CN110830161B - A method and apparatus for determining the size of a transport block - Google Patents

Abstract

The embodiments of the present application disclose a method and an apparatus for determining the size of a transport block, which relate to the field of communications and solve the problem of how to determine a TBS based on non-slot repetition. The specific solution is as follows: the sending device determines the TBS according to the number of REs and the modulation and coding modes included in the M first time units, and sends S times the data carried on the symbols corresponding to the first time units. The receiving device receives data carried on symbols corresponding to the first time unit S times, determines TBS according to the number of REs included in the M first time units and a modulation and coding scheme, and decodes data on symbols corresponding to the first time unit according to the TBS. where M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit, S is an integer, S is greater than or equal to 1 and less than or equal to K. The embodiments of the present application are used for the process of determining the size of the transport block.

Description

A method and apparatus for determining the size of a transport block

This application claims the priority of the Chinese patent application with the application number 201810911082.3 and the application title "A Method and Device for Determining Transmission Block Size", which was filed with the China Patent Office on August 10, 2018, the entire contents of which are incorporated by reference in in this application.

technical field

The embodiments of the present application relate to the field of communications, and in particular, to a method and apparatus for determining the size of a transport block.

Background technique

In order to cope with the explosive growth of mobile data traffic in the future, the connection of massive mobile communication devices, and the emerging of various new services and application scenarios, the fifth generation (5G) mobile communication system emerges as the times require. For wireless control in industrial manufacturing or production processes, motion control of unmanned vehicles and unmanned aerial vehicles, and tactile interaction applications such as remote repair and remote surgery, the International Telecommunication Union (ITU) defines high reliability and low time. Delay communication (ultra reliable and low latency communications, URLLC). The main features of URLLC services are that they require ultra-high reliability, low latency, less data transmission and burstiness.

In the process of transmitting data between a terminal device and a network device, a transport block size (transport block size, TBS) needs to be determined. The so-called transport block size refers to the amount of data (number of bits) carried on the time-frequency resource. In the prior art, data can be repeatedly transmitted on a slot-based basis to determine the TBS in a slot. However, for URLLC scenarios with high latency requirements, non-slot-based repeated data transmission can be used to meet the low latency feature. Therefore, how to determine the TBS based on non-slot repetition is an urgent problem to be solved.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a method and apparatus for determining the size of a transport block, which solves the problem of how to determine the TBS based on non-slot repetition.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

In a first aspect, an embodiment of the present application provides a method for determining the size of a transport block, and the method can be applied to a terminal device, or the method can be applied to an apparatus for determining the size of a transport block that can support the terminal device to implement the method, such as this The apparatus for determining the size of the transport block includes a chip system, or the method may be applied to a network device, or the method may be applied to the apparatus for determining the size of the transport block that can support the network device to implement the method, for example, the apparatus for determining the size of the transport block includes Chip system, the method includes: after receiving data carried on symbols corresponding to a first time unit for S times, determining a TBS according to the number of resource elements (resource elements, REs) and a modulation and coding mode included in the M first time units, and according to the TBS Decode the data on the symbol corresponding to the first time unit. Wherein, S is an integer, S is greater than or equal to 1, and less than or equal to K, K is an integer greater than or equal to 2, K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit; M is greater than or equal to 2 or equal to 1 and an integer less than or equal to K.

The method for determining the size of the transport block provided by the embodiment of the present application calculates the TBS based on the whole or part of the non-slot repetition, uses a first time unit to send the data corresponding to the TBS once, and repeats the sending S times. Therefore, the TBS can be calculated using the symbols occupied by all or part of the transport blocks in the preset repetition times based on non-slot repetition without exceeding the upper limit of the number of symbols used for calculating the TBS. At the same time, while ensuring the reliability of transmission, the flexibility of the starting point of repeated transmission can also be ensured.

In a second aspect, an embodiment of the present application provides a method for determining the size of a transport block, and the method can be applied to a terminal device, or the method can be applied to an apparatus for determining the size of a transport block that can support a terminal device to implement the method, such as this The apparatus for determining the size of the transport block includes a chip system, or the method may be applied to a network device, or the method may be applied to the apparatus for determining the size of the transport block that can support the network device to implement the method, for example, the apparatus for determining the size of the transport block includes A chip system, the method includes: firstly determining a TBS according to the number of REs included in the M first time units and a modulation and coding mode, and then repeatedly sending S times data carried on symbols corresponding to the first time unit according to the TBS, wherein M is greater than or equal to or equal to 1, and an integer less than or equal to K, where K is an integer greater than or equal to 2, K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit; S is an integer, and S is greater than or equal to 1 , and less than or equal to K.

The method for determining the size of the transport block provided by the embodiment of the present application calculates the TBS based on the whole or part of the non-slot repetition, uses a first time unit to send the data corresponding to the TBS once, and repeats the sending S times. Therefore, the TBS can be calculated using the symbols occupied by all or part of the transport blocks in the preset repetition times based on non-slot repetition without exceeding the upper limit of the number of symbols used for calculating the TBS. At the same time, while ensuring the reliability of transmission, the flexibility of the starting point of repeated transmission can also be ensured.

In a third aspect, an embodiment of the present application further provides an apparatus for determining the size of a transport block, which is used to implement the method described in the first aspect above. The apparatus for determining the size of the transport block is a terminal device or a device for determining the size of the transport block that supports the terminal device to implement the method described in the first aspect, for example, the apparatus for determining the size of the transport block includes a chip system, and/or the device for determining the size of the transport block. The apparatus is a network device or a device for determining a transport block size that supports the network device to implement the method described in the first aspect, for example, the device for determining a transport block size includes a chip system. For example, the means for determining the size of the transport block includes: a processing unit. The processing unit is configured to determine the TBS according to the number of REs and the modulation and coding modes included in the M first time units, and decode the data on the symbol corresponding to the first time unit received by the receiving unit according to the TBS.

Optionally, the apparatus for determining the size of the transport block may further include a communication interface, configured to receive data carried S times on the symbols corresponding to the first time unit. Wherein, S is an integer, S is greater than or equal to 1, and less than or equal to K, K is an integer greater than or equal to 2, K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit; M is greater than or equal to 2 or equal to 1 and an integer less than or equal to K.

In a fourth aspect, an embodiment of the present application further provides an apparatus for determining the size of a transport block, which is used to implement the method described in the second aspect above. The apparatus for determining the size of the transport block is a terminal device or an apparatus for determining the size of the transport block that supports the terminal device to implement the method described in the second aspect, for example, the apparatus for determining the size of the transport block includes a chip system, and/or a device for determining the size of the transport block. The apparatus is a network device or a device for determining a transport block size that supports the network device to implement the method described in the second aspect, for example, the device for determining a transport block size includes a chip system. For example, the means for determining the size of the transport block includes: a processing unit. The processing unit is configured to determine the TBS according to the number of REs and the modulation and coding modes included in the M first time units.

Optionally, the apparatus for determining the size of the transport block may further include a communication interface for sending data carried on the symbol corresponding to the first time unit by repeatedly sending S times according to the TBS determined by the processing unit. Among them, M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit; S is an integer, S is greater than or equal to 1 and less than or equal to K.

With reference to any one of the first aspect to the fourth aspect, in a first possible implementation manner, the TBS is determined according to the number of REs included in the K first time units and the modulation and coding manner, that is, M=K. The first transmission opportunity in K is t, and the first transmission opportunity is the first time to send the data carried on the symbol corresponding to the first time unit, where t is a positive integer greater than or equal to 1 and less than or equal to K .

Depending on the timing of the first transmission, the actual number of repetitions may also be different.

In a possible implementation manner, S=K-t+1, which represents the actual repetition times of repeated transmission of data carried on the symbol corresponding to the first time unit in the second time unit.

In another possible implementation manner, S=K, indicating the actual repetition times of repeated transmission of data carried on the symbol corresponding to the first time unit in the second time unit.

With reference to any one of the first aspect to the second aspect, in another possible implementation manner, the TBS is determined according to the number of REs included in one first time unit and the modulation and coding manner, that is, M=1. After determining the size of the transport block according to the number of REs and the modulation and coding modes included in the M first time units, the method includes: if the symbols corresponding to the P first time units carry demodulation reference signals (demodulation reference signals, DMRS), according to the first time unit Adjusting the TBS by a scaling factor obtains the first adjusted TBS, the first scaling factor is greater than 1, P is an integer, and P is greater than or equal to 1 and less than K. Or, if all symbols corresponding to the first time unit are used to carry a physical uplink shared channel (PUSCH) or a physical downlink shared channel (physical downlink shared channel, PDSCH), adjust the TBS according to the second scaling factor to obtain the first Two adjusted TBS, the second scale factor is less than 1.

With reference to any one of the third aspect to the fourth aspect, in another possible implementation manner, the TBS is determined according to the number of REs included in one first time unit and the modulation and coding manner, that is, M=1. If the symbols corresponding to the P first time units carry the DMRS, the processing module is further configured to adjust the TBS according to the first scale factor to obtain the first adjusted TBS, where the first scale factor is greater than 1, P is an integer, and P is greater than or equal to 1 and less than K. Or, if all symbols corresponding to the first time unit are used to carry a physical uplink shared channel (PUSCH) or a physical downlink shared channel (physical downlink shared channel, PDSCH), the processing module is also used to, according to the second standard The TBS is adjusted by the scale factor to obtain a second adjusted TBS, and the second scale factor is less than 1.

Thus, it is guaranteed that when the number of REs included in a first time unit is selected for calculating the TBS repeated based on the first time unit, the TBS obtained by multiplying the TBS of the copy itself and the scaling factor and the average TBS of all repeated copies Consistently, the adjusted TBS is used as the TBS repeated based on the first time unit. The so-called copy refers to the data that is carried on the time-frequency resource and transmitted once.

Optionally, in practical applications, the time domain resources required for repeated data transmission based on the first time unit may also exceed the time-frequency resources included in a second time unit. In this case, M=K, that is, the TBS is still determined according to the number of REs included in the K first time units and the modulation and coding method, which is not suitable because the number of REs included in the K first time units exceeds one The number of REs included in the second time unit. Therefore, the embodiments of the present application may further include the following specific implementation manners.

In a fifth aspect, an embodiment of the present application provides a method for determining the size of a transport block, and the method can be applied to a terminal device, or the method can be applied to an apparatus for determining the size of a transport block that can support a terminal device to implement the method, such as this The apparatus for determining the size of the transport block includes a chip system, or the method may be applied to a network device, or the method may be applied to the apparatus for determining the size of the transport block that can support the network device to implement the method, for example, the apparatus for determining the size of the transport block includes Chip system, the method includes: M=K, after receiving data carried on symbols corresponding to a first time unit for S times, when the duration of K first time units is greater than the duration of one second time unit, according to the reference duration corresponding to The number of REs and the modulation and coding scheme determine the TBS, and the data on the symbol corresponding to the first time unit is decoded according to the TBS. Wherein, S is an integer, S is greater than or equal to 1, and less than or equal to K, K is an integer greater than or equal to 2, and K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit. The reference duration is equal to the duration of the second time unit; or, the reference duration is equal to the duration of R first time units, R is the largest integer less than K, and the reference duration is less than the duration of the second time unit.

The method for determining the size of the transport block provided by the embodiment of the present application calculates the TBS based on the number of REs corresponding to the reference duration, sends the data corresponding to the TBS once with a first time unit, and repeats the sending K times. Therefore, TBS can be calculated by using symbols occupied by all or part of the transport blocks in the preset repetition times based on non-slot repetitions on the premise that the upper limit of the number of symbols used for calculating TBS is exceeded. At the same time, while ensuring the reliability of transmission, the flexibility of the starting point of repeated transmission can also be ensured.

In a sixth aspect, an embodiment of the present application provides a method for determining the size of a transport block, and the method can be applied to a terminal device, or the method can be applied to an apparatus for determining the size of a transport block that can support a terminal device to implement the method, such as this The apparatus for determining the size of the transport block includes a chip system, or the method may be applied to a network device, or the method may be applied to the apparatus for determining the size of the transport block that can support the network device to implement the method, for example, the apparatus for determining the size of the transport block includes Chip system, the method includes: M=K, when the duration of K first time units is greater than the duration of one second time unit, determining the size of the transport block according to the number of REs corresponding to the reference duration and the modulation and coding mode, and then repeating the transmission according to the TBS S times of data carried on the symbol corresponding to the first time unit, where K is an integer greater than or equal to 2, K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit; S is an integer, S Greater than or equal to 1 and less than or equal to K. The reference duration is equal to the duration of the second time unit; or, the reference duration is equal to the duration of R first time units, R is the largest integer less than K, and the reference duration is less than the duration of the second time unit.

The method for determining the size of the transport block provided by the embodiment of the present application calculates the TBS based on the number of REs corresponding to the reference duration, sends the data corresponding to the TBS once with a first time unit, and repeats the sending K times. Therefore, TBS can be calculated by using symbols occupied by all or part of the transport blocks in the preset repetition times based on non-slot repetitions on the premise that the upper limit of the number of symbols used for calculating TBS is exceeded. At the same time, while ensuring the reliability of transmission, the flexibility of the starting point of repeated transmission can also be ensured.

In a seventh aspect, an embodiment of the present application further provides an apparatus for determining the size of a transport block, which is used to implement the method described in the fifth aspect above. The apparatus for determining the size of the transport block is a terminal device or an apparatus for determining the size of the transport block that supports the terminal device to implement the method described in the fifth aspect, for example, the apparatus for determining the size of the transport block includes a chip system, and/or a device for determining the size of the transport block. The apparatus is a network device or a device for determining a transport block size that supports the network device to implement the method described in the fifth aspect, for example, the device for determining a transport block size includes a chip system. For example, the means for determining the size of the transport block includes: a processing unit. The processing unit is used for M=K. When the duration of K first time units is greater than the duration of one second time unit, the TBS is determined according to the number of REs corresponding to the reference duration and the modulation and coding mode, and received by the TBS decoding receiving unit. The data on the symbol corresponding to the arrived first time unit.

Optionally, the apparatus for determining the size of the transport block may further include a communication interface, configured to receive data carried S times on the symbols corresponding to the first time unit.

In an eighth aspect, an embodiment of the present application further provides an apparatus for determining the size of a transport block, which is used to implement the method described in the sixth aspect. The apparatus for determining the size of the transport block is a terminal device or an apparatus for determining the size of the transport block that supports the terminal device to implement the method described in the sixth aspect, for example, the apparatus for determining the size of the transport block includes a chip system, and/or, the device for determining the size of the transport block. The apparatus is a network device or a device for determining a transport block size that supports the network device to implement the method described in the sixth aspect, for example, the device for determining a transport block size includes a chip system. For example, the means for determining the size of the transport block includes: a processing unit. The processing unit is used for M=K. When the duration of the K first time units is greater than the duration of one second time unit, the TBS is determined according to the number of REs corresponding to the reference duration and the modulation and coding mode.

Optionally, the apparatus for determining the size of the transport block may further include a communication interface, configured to repeatedly send the data carried on the symbol corresponding to the first time unit S times according to the TBS determined by the processing unit.

With reference to any one of the fifth aspect to the eighth aspect, in a possible implementation manner, the first transmission opportunity in K is t, and the first transmission opportunity is the first transmission of the corresponding data carried in the first time unit. The timing of the data on the symbol, where t is a positive integer greater than or equal to 1 and less than or equal to K.

In a ninth aspect, an embodiment of the present application provides a network device, where the network device has a function of implementing the actual behavior of the network device in the above method. The functions can be implemented by hardware, and can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the network device includes a processor and a transceiver, and the processor is configured to support the network device to perform the corresponding functions in the above method. The transceiver is used for supporting the communication between the network device and the terminal device, sending the information or instructions involved in the above method to the terminal device, or receiving the information or instructions involved in the above method sent by the terminal device. The network device may also include a memory for coupling with the processor that holds program instructions and data necessary for the network device.

In a tenth aspect, an embodiment of the present application provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the above method design. The functions can be implemented by hardware, and can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. The modules may be software and/or hardware.

In a possible design, the structure of the terminal device includes a transceiver and a processor, and the transceiver is configured to support the terminal device to send or receive data carried on symbols corresponding to the first time unit S times. The processor is configured to determine the TBS according to the number of REs and the modulation and coding modes included in the M first time units, and decode data on symbols corresponding to the first time unit according to the TBS.

In an eleventh aspect, an embodiment of the present application further provides a computer-readable storage medium, comprising: computer software instructions; when the computer software instructions are executed in the apparatus for determining the size of the transmission block, the apparatus for determining the size of the transmission block executes the above The method of the first aspect to the second aspect or the method of the fifth aspect to the sixth aspect.

In a twelfth aspect, an embodiment of the present application further provides a computer program product including instructions, when the computer program product is executed in the apparatus for determining the size of the transmission block, the apparatus for determining the size of the transmission block executes the above-mentioned first to sixth aspects. The method described in the second aspect or the method described in the fifth aspect to the sixth aspect.

In a thirteenth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may also include a memory, for implementing the functions of the network device or the terminal device in the above method. The chip system can be composed of chips, and can also include chips and other discrete devices.

In a fourteenth aspect, an embodiment of the present application further provides a communication system, where the communication system includes the terminal device described in the third aspect or an apparatus for determining a transport block size that supports the terminal device to implement the method described in the first aspect, and The network device described in the fourth aspect or the apparatus for determining the transport block size that supports the network device to implement the method described in the second aspect;

Or the communication system includes the terminal device described in the seventh aspect or the apparatus for determining the transport block size that supports the terminal device to implement the method described in the fifth aspect, and the network device described in the eighth aspect or the support network device to implement the sixth aspect an apparatus for determining a transport block size of the method described;

Or the communication system includes the terminal device described in the ninth aspect or a device for determining the transport block size that supports the terminal device to implement the method described in the first aspect or the fifth aspect, and the network device described in the tenth aspect or supports the implementation of the network device. The apparatus for determining a transport block size of the method described in the second aspect or the sixth aspect.

In addition, for the technical effects brought about by the design manners of any of the above aspects, reference may be made to the technical effects brought about by different design manners in the first aspect and the second aspect, which will not be repeated here.

In this embodiment of the present application, the names of the terminal device, the network device, and the apparatus for determining the size of the transport block do not limit the devices themselves. In actual implementation, these devices may appear with other names. As long as the functions of each device are similar to the embodiments of the present application, they fall within the scope of the claims of the present application and their equivalents.

In a fifteenth aspect, an embodiment of the present application provides a method for determining the size of a transport block, and the method can be applied to a terminal device, or the method can be applied to an apparatus for determining the size of a transport block that can support a terminal device to implement the method, for example The apparatus for determining the size of the transport block includes a chip system, or the method may be applied to a network device, or the method may be applied to an apparatus for determining the size of the transport block that can support the network device to implement the method, for example, the apparatus for determining the size of the transport block A chip system is included, and the method includes: after receiving the data carried on the symbols corresponding to the first time units for S times, determining the first TBS according to the number of REs, the first code rate and the first modulation order included in the M first time units , and decode the data on the symbol corresponding to the first time unit according to the first TBS. Wherein, S is an integer, S is greater than or equal to 1, and less than or equal to K, K is an integer greater than or equal to 2, and K indicates pre-configuration or downlink control information (DCI) indicates that the repeated transmission is carried at the first time The number of times of data on the symbol corresponding to the unit; M is an integer greater than or equal to 1 and less than or equal to K.

The method for determining the size of the transport block provided by the embodiment of the present application calculates the TBS based on the whole or part of the non-slot repetition, uses a first time unit to send the data corresponding to the TBS once, and repeats the sending S times. Therefore, the TBS can be calculated using the symbols occupied by all or part of the transport blocks in the preset repetition times based on non-slot repetition without exceeding the upper limit of the number of symbols used for calculating the TBS. At the same time, while ensuring the reliability of transmission, the flexibility of the starting point of repeated transmission can also be ensured.

In a sixteenth aspect, an embodiment of the present application provides a method for determining the size of a transport block, and the method can be applied to a terminal device, or the method can be applied to an apparatus for determining the size of a transport block that can support a terminal device to implement the method, for example The apparatus for determining the size of the transport block includes a chip system, or the method may be applied to a network device, or the method may be applied to an apparatus for determining the size of the transport block that can support the network device to implement the method, for example, the apparatus for determining the size of the transport block A chip system is included, and the method includes: firstly determining a first TBS according to the number of REs included in the M first time units, a first code rate and a first modulation order, and then repeatedly sending S times according to the first TBS to be carried at the first time The data on the symbol corresponding to the unit, where M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K indicates pre-configuration or DCI indicates that the repeated transmission is carried in the corresponding first time unit. The number of times of data on the symbol; S is an integer, and S is greater than or equal to 1 and less than or equal to K.

The method for determining the size of the transport block provided by the embodiment of the present application calculates the TBS based on the whole or part of the non-slot repetition, uses a first time unit to send the data corresponding to the TBS once, and repeats the sending S times. Therefore, the TBS can be calculated using the symbols occupied by all or part of the transport blocks in the preset repetition times based on non-slot repetition without exceeding the upper limit of the number of symbols used for calculating the TBS. At the same time, while ensuring the reliability of transmission, the flexibility of the starting point of repeated transmission can also be ensured.

With reference to the fifteenth aspect or the sixteenth aspect, in a first possible implementation manner, before determining the first TBS according to the number of REs included in the M first time units, the first code rate and the first modulation order, The method further includes: determining the second TBS and the reference code rate according to the number of REs, the first code rate and the first modulation order included in the K first time units, and if the reference code rate is greater than the code rate threshold, determining M according to the code rate threshold , M<K, and the code rate corresponding to the first TBS determined according to M acting on a first time unit is less than or equal to the code rate threshold. The reference code rate is the code rate corresponding to the second TBS acting on a first time unit, the first code rate is the code rate indicated by the network device, and the first modulation order is the modulation order indicated by the network device. M is the largest positive integer that satisfies the reference code rate not greater than the code rate threshold. The so-called "reference code rate" may refer to the code when the TB corresponding to the first TBS is carried on the time-frequency resources occupied by a first time unit. Rate. In the following, it should be understood that the code rate at which the first TBS determined by M acts on a first time unit may refer to the code rate when the TB corresponding to the first TBS is carried on the time-frequency resources occupied by a first time unit for transmission. code rate. The code rate when the TB corresponding to the first TBS is carried on the time-frequency resources occupied by a first time unit can also be understood as carrying the TB corresponding to the first TBS on the time-frequency resources occupied by a first time unit The number of bits in transmission.

In the method for determining the size of the transmission block provided by the embodiment of the present application, before transmitting the data packet, by adjusting the number of mini-slots used for calculating the TBS, the reference code rate can be overcome to be greater than the code rate threshold, and the incomplete transmission of the data packet can be avoided. The decoding failure at the receiving end will result, and a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

With reference to the fifteenth aspect or the sixteenth aspect, in a second possible implementation manner, M=K, and the number of REs included in the M first time units, the first code rate and the first modulation order are determined. A TBS, including: determining the second TBS and the reference code rate according to the number of REs included in the K first time units, the first code rate and the first modulation order; if the reference code rate is greater than the code rate threshold, determining the first TBS according to the scale factor One TBS, the first TBS is smaller than the second TBS, the scale factor is greater than 0 and less than 1, and the code rate corresponding to the first TBS acting on a first time unit is less than or equal to the code rate threshold. The reference code rate is the code rate corresponding to the second TBS acting on a first time unit, the first code rate is indicated by the network device, and the first modulation order is indicated by the network device.

In the method for determining the size of the transmission block provided by the embodiment of the present application, before transmitting the data packet, by using the scale factor to determine the TBS, the reference code rate can be overcome to be greater than the code rate threshold, and the decoding failure at the receiving end caused by the incomplete transmission of the data packet can be avoided. , a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

With reference to the fifteenth aspect or the sixteenth aspect, in a second possible implementation manner, M=K, and the number of REs included in the M first time units, the first code rate and the first modulation order are determined. Before one TBS, the method further includes: determining the second TBS and the reference code rate according to the number of REs included in the K first time units, the second code rate and the second modulation order, and the reference code rate is the second TBS acting on a first time unit. The code rate corresponding to a time unit, the second code rate is indicated by the network device, and the second modulation order is indicated by the network device; according to the number of resource elements REs included in the M first time units, the first code rate and the first modulation order Determining the first TBS according to the number of data includes: if the reference code rate is greater than the code rate threshold, determining the first TBS according to the number of REs included in the M first time units, the first code rate and the first modulation order, for determining the first TBS The first code rate of is the code rate threshold, and the code rate corresponding to a first time unit acting on the first TBS is less than or equal to the code rate threshold.

In the method for determining the size of a transmission block provided by the embodiment of the present application, before transmitting a data packet, the TBS can be determined by using a preconfigured code rate, which can overcome that the reference code rate is greater than the code rate threshold, and avoid the reception caused by incomplete transmission of the data packet. If the decoding fails at the end, a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

In a seventeenth aspect, an embodiment of the present application further provides an apparatus for determining the size of a transport block, which is used to implement the method described in the fifteenth aspect above. The apparatus for determining the size of the transport block is a terminal device or an apparatus for determining the size of the transport block that supports the terminal device to implement the method described in the fifteenth aspect, for example, the apparatus for determining the size of the transport block includes a chip system, and/or, determines the size of the transport block The apparatus is a network device or a device for determining a transport block size that supports the network device to implement the method described in the fifteenth aspect, for example, the device for determining a transport block size includes a chip system. For example, the means for determining the size of the transport block includes: a processing unit. The processing unit determines the first TBS according to the number of REs included in the M first time units, the first code rate and the first modulation order, and decodes the first TBS according to the corresponding first time unit received by the first TBS decoding receiving unit. Symbolic data, M is an integer greater than or equal to 1 and less than or equal to K.

Optionally, the device for determining the size of the transport block may further include a communication interface for receiving data carried on symbols corresponding to the first time unit for S times, where S is an integer, S is greater than or equal to 1, and less than or equal to K, and K is greater than or equal to K. or an integer equal to 2, K represents the pre-configuration or the DCI indicates the number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit.

In an eighteenth aspect, an embodiment of the present application further provides an apparatus for determining the size of a transport block, which is used to implement the method described in the sixteenth aspect above. The apparatus for determining the size of the transport block is a terminal device or a device for determining the size of the transport block that supports the terminal device to implement the method described in the tenth aspect, for example, the apparatus for determining the size of the transport block includes a chip system, and/or, the device for determining the size of the transport block. The apparatus is a network device or a device for determining a transport block size that supports the network device to implement the method described in the sixteenth aspect. For example, the device for determining a transport block size includes a chip system. For example, the means for determining the size of the transport block includes: a processing unit. The processing unit determines the first TBS according to the number of REs, the first code rate and the first modulation order included in the M first time units, where M is an integer greater than or equal to 1 and less than or equal to K, where K is greater than or equal to K or an integer equal to 2, K represents the pre-configuration or the DCI indicates the number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit.

Optionally, the apparatus for determining the size of the transport block may further include a communication interface for repeatedly sending data carried on the symbol corresponding to the first time unit for S times according to the first TBS determined by the processing unit, where S is an integer, and S is greater than or equal to 1, and less than or equal to K.

With reference to the seventeenth aspect or the eighteenth aspect, in a first possible implementation manner, the processing unit is further configured to: according to the number of REs, the first code rate and the first modulation order included in the K first time units Determine the second TBS and the reference code rate, and if the reference code rate is greater than the code rate threshold, determine M according to the code rate threshold. Wherein, M<K, and the code rate corresponding to the first TBS determined according to M acting on a first time unit is less than or equal to the code rate threshold. The reference code rate is the code rate corresponding to the second TBS acting on a first time unit, the first code rate is indicated by the network device, and the first modulation order is indicated by the network device.

In the method for determining the size of the transmission block provided by the embodiment of the present application, before transmitting the data packet, by adjusting the number of mini-slots used for calculating the TBS, the reference code rate can be overcome to be greater than the code rate threshold, and the incomplete transmission of the data packet can be avoided. The decoding failure at the receiving end will result, and a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

With reference to the seventeenth aspect or the eighteenth aspect, in a second possible implementation manner, M=K, and the processing unit is configured to: according to the number of REs included in the K first time units, the first code rate and the first The modulation order determines the second TBS and the reference code rate. If the reference code rate is greater than the code rate threshold, the first TBS is determined according to the scale factor. Wherein, the first TBS is less than the second TBS, the scale factor is greater than 0 and less than 1, and the code rate corresponding to a first time unit acting on the first TBS is less than or equal to the code rate threshold. The reference code rate is the code rate corresponding to the second TBS acting on a first time unit, the first code rate is indicated by the network device, and the first modulation order is indicated by the network device.

In the method for determining the size of the transmission block provided by the embodiment of the present application, before transmitting the data packet, by using the scale factor to determine the TBS, the reference code rate can be overcome to be greater than the code rate threshold, and the decoding failure at the receiving end caused by the incomplete transmission of the data packet can be avoided. , a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

With reference to the seventeenth aspect or the eighteenth aspect, in a third possible implementation manner, M=K, the processing unit is further configured to: according to the number of REs included in the K first time units, the second code rate and the The second modulation order determines the second TBS and the reference code rate, the reference code rate is the code rate corresponding to the second TBS acting on a first time unit, the second code rate is indicated by the network device, and the second modulation order is indicated by the network device The processing unit is used for: if the reference code rate is greater than the code rate threshold, determine the first TBS according to the number of REs included in the M first time units, the first code rate and the first modulation order, and is used to determine the value of the first TBS. The first code rate is a code rate threshold, and the code rate corresponding to a first time unit acting on the first TBS is less than or equal to the code rate threshold.

In the method for determining the size of a transmission block provided by the embodiment of the present application, before transmitting a data packet, the TBS can be determined by using a preconfigured code rate, which can overcome that the reference code rate is greater than the code rate threshold, and avoid the reception caused by incomplete transmission of the data packet. If the decoding fails at the end, a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

In combination with any of the above aspects, in a fourth possible implementation manner, M is pre-configured, predefined or indicated by DCI, and the first TBS determined according to M acts on a code rate corresponding to a first time unit that is less than or equal to the code rate. rate threshold.

Combining the various possible implementation manners above, in a fifth possible implementation manner, the duration of the first time unit is the maximum or minimum value among the durations of the K first time units.

In a nineteenth aspect, an embodiment of the present application provides a network device, where the network device has a function of implementing the actual behavior of the network device in the above method. The functions can be implemented by hardware, and can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions.

In a possible design, the structure of the network device includes a processor and a transceiver, and the processor is configured to support the network device to perform the corresponding functions in the above method. The transceiver is used for supporting the communication between the network device and the terminal device, sending the information or instructions involved in the above method to the terminal device, or receiving the information or instructions involved in the above method sent by the terminal device. The network device may also include a memory for coupling with the processor that holds program instructions and data necessary for the network device.

In a twentieth aspect, an embodiment of the present application provides a terminal device, where the terminal device has a function of implementing the behavior of the terminal device in the foregoing method design. The functions can be implemented by hardware, and can also be implemented by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above functions. The modules may be software and/or hardware.

In a possible design, the structure of the terminal device includes a transceiver and a processor, and the transceiver is configured to support the terminal device to send or receive data carried on symbols corresponding to the first time unit S times. The processor is configured to determine the first TBS according to the number of REs included in the M first time units, the first code rate and the first modulation order, and decode the data on the symbol corresponding to the first time unit according to the first TBS.

In a twenty-first aspect, an embodiment of the present application further provides a computer-readable storage medium, comprising: computer software instructions; when the computer software instructions are executed in the apparatus for determining the size of the transmission block, the apparatus for determining the size of the transmission block executes The methods described in the fifteenth aspect to the sixteenth aspect above.

In a twenty-second aspect, an embodiment of the present application further provides a computer program product including instructions, when the computer program product runs in the apparatus for determining the size of the transmission block, the apparatus for determining the size of the transmission block executes the above-mentioned fifteenth aspect to the method described in the sixteenth aspect.

In a twenty-third aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor, and may also include a memory, for implementing the functions of the network device or the terminal device in the above method. The chip system can be composed of chips, and can also include chips and other discrete devices.

In a twenty-fourth aspect, an embodiment of the present application further provides a communication system, where the communication system includes the terminal device described in the seventeenth aspect or a device that supports the terminal device to implement the method described in the fifteenth aspect for determining the transport block size an apparatus, and the network device described in the eighteenth aspect or a device for determining a transport block size that supports the network device to implement the method described in the sixteenth aspect;

Alternatively, the communication system includes the terminal device described in the nineteenth aspect or the apparatus for determining the transport block size that supports the terminal device to implement the method described in the fifteenth aspect, and the network device described in the twentieth aspect or the support network device to implement The method described in the sixteenth aspect is an apparatus for determining a transport block size.

In addition, for the technical effects brought by the design methods of any of the above aspects, reference may be made to the technical effects brought by different design methods in the fifteenth aspect and the sixteenth aspect, which will not be repeated here.

In this embodiment of the present application, the names of the terminal device, the network device, and the apparatus for determining the size of the transport block do not limit the devices themselves. In actual implementation, these devices may appear with other names. As long as the functions of each device are similar to the embodiments of the present application, they fall within the scope of the claims of the present application and their equivalents.

Description of drawings

1 is an example diagram of a transmission block based on time slot repetition provided by the prior art;

2 is an example diagram of a transmission block based on mini-slot repetition provided by the prior art;

FIG. 3 is an exemplary diagram of the architecture of a mobile communication system provided by an embodiment of the present application;

FIG. 4 is an example diagram of a communication system provided by an embodiment of the present application;

5 is a flowchart 1 of a method for determining the size of a transport block provided by an embodiment of the present application;

FIG. 6 is an example diagram 1 of data transmission based on mini-slot repetition provided by an embodiment of the present application;

FIG. 7 is an example FIG. 2 of transmission data based on mini-slot repetition provided by an embodiment of the present application;

FIG. 8 is an example FIG. 3 of transmission data based on mini-slot repetition provided by an embodiment of the present application;

9 is an example diagram of a DMRS transmission provided by the prior art;

10 is a flowchart 2 of a method for determining the size of a transport block provided by an embodiment of the present application;

FIG. 11 is an example FIG. 4 of transmission data based on mini-slot repetition provided by an embodiment of the application;

FIG. 12 is an example FIG. 5 of transmission data based on mini-slot repetition provided by an embodiment of the present application;

FIG. 13 is a composition example diagram 1 of an apparatus for determining a transport block size provided by an embodiment of the present application;

FIG. 14 is a composition example of an apparatus for determining the size of a transport block provided by an embodiment of the present application, FIG. 2;

FIG. 15 is an exemplary diagram of the composition of a network device provided by an embodiment of the present application;

FIG. 16 is a diagram of an example composition of a terminal device provided by an embodiment of the present application;

FIG. 17 is a flowchart 3 of a method for determining the size of a transport block provided by an embodiment of the present application;

FIG. 18 is a fourth flowchart of a method for determining the size of a transport block provided by an embodiment of the present application;

FIG. 19 is a flowchart 5 of a method for determining the size of a transport block provided by an embodiment of the present application;

FIG. 20 is a composition example of an apparatus for determining the size of a transport block provided by an embodiment of the present application, FIG. 3;

FIG. 21 is a composition example of an apparatus for determining the size of a transport block provided by an embodiment of the application, FIG. 4;

FIG. 22 is an exemplary diagram of the composition of a network device provided by an embodiment of the present application;

FIG. 23 is a diagram of an example composition of a terminal device provided by an embodiment of the present application.

Detailed ways

The terms "first", "second" and "third" in the description and claims of the present application and the above drawings are used to distinguish different objects, rather than to limit a specific order.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiments or designs described in the embodiments of the present application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

Mobile communication technology has profoundly changed people's lives, but people's pursuit of higher-performance mobile communication technology has never stopped. In order to cope with the explosive growth of mobile data traffic in the future, the connection of massive mobile communication devices, and the emerging of various new services and application scenarios, the fifth generation (5G) mobile communication system emerges as the times require. The International Telecommunication Union (ITU) defines three types of application scenarios for 5G and future mobile communication systems: enhanced mobile broadband (eMBB), ultra reliable and low latency communication communications, URLLC) and massive machine type communications (mMTC).

Typical eMBB services include: ultra-high-definition video, augmented reality (AR), virtual reality (VR), etc. The main features of these services are large amount of data transmission and high transmission rate.

Typical mMTC services include: smart grid power distribution automation, smart city, etc. The main features are the huge number of networked devices, the small amount of data transmitted, and the insensitivity of data to transmission delay. These mMTC terminals need to meet low cost and very long standby time. time requirements.

Typical URLLC businesses include: wireless control in industrial manufacturing or production processes, motion control of driverless cars and drones, and tactile interaction applications such as remote repair and remote surgery. The main features of these services are ultra-reliable requirements. high reliability, low latency, small amount of transmitted data, and burstiness. For example, the vehicle-to-everything (V2X) information exchange requires a reliability of 99.999%, and the end-to-end delay is 5 milliseconds (millisecond, ms); power distribution requires a reliability of 99.9999%, The end-to-end delay is 5ms; the reliability of factory automation is 99.9999%, and the end-to-end delay is 2ms.

In the prior art, in the process of transmitting data between a terminal device and a network device, it is necessary to align the amount of data to be sent by the terminal device and the amount of data to be received by the network device. size, TBS). It can be understood that the size of the transport block is the amount of data (number of bits) carried on a certain time-frequency resource. A transport block (transport block, TB) refers to the data that is carried on the time-frequency resource and transmitted once. In addition, each transmission of data carried on the time-frequency resource may be referred to as a repetition (repetition). The flow of the method for determining TBS provided by the prior art is briefly introduced below.

确定一个时隙中的RE数。其中，N_RE′表示一个时隙中的RE数；

表示一个物理资源块(physical resource block，PRB)中频域上的载波数，例如，

表示一个时隙内物理上行共享信道(physical uplink sharedchannel，PUSCH)或物理下行共享信道(physical downlink shared channel，PDSCH)调度的符号数，PUSCH用于传输上行数据，PDSCH用于传输下行数据，

表示一个PRB中解调参考信号(demodulation reference signal，DMRS)所占的RE数，包括DMRS开销，

表示是由高层参数PUSCH-业务小区配置(PUSCH-servingcellconfig)中的开销(xOverhead)参数配置的开销。First, the number of resource elements (REs) in a slot (slot) is determined. Specifically, using formula one

Determine the number of REs in a slot. Wherein, N _RE ' represents the number of REs in a time slot;

represents the number of carriers in the frequency domain in a physical resource block (PRB), for example,

Represents the number of symbols scheduled by physical uplink shared channel (PUSCH) or physical downlink shared channel (PDSCH) in a time slot, PUSCH is used to transmit uplink data, PDSCH is used to transmit downlink data,

Indicates the number of REs occupied by the demodulation reference signal (DMRS) in a PRB, including the DMRS overhead,

Indicates the overhead configured by the overhead (xOverhead) parameter in the upper layer parameter PUSCH-serving cell configuration (PUSCH-servingcellconfig).

Second, the number of REs for calculating TBS is determined according to the number of REs in a time slot. Specifically, the number of REs used to calculate TBS is obtained by formula 2 N _RE =min(156, N _RE ′)·n _PRB , where N _RE represents the number of REs used to calculate TBS; n _PRB represents the number of PRBs.

计算信息比特的量化中间值，其中，

在协议中查表得到不小于N_i'_nfo最近的一个值作为TBS；如果N_info＞3824，通过公式五

计算信息比特的量化中间值，其中，

如果码率R≤1/4，

其中，

否则，

其中，

C表示编码块的数目。Third, the TBS is determined according to the number of REs used to calculate the TBS. Specifically, the number of information bits is obtained by formula 3 N _info =N _RE ·R·Q _m ·υ. Among them, Q _m is the modulation order, R is the code rate, Q _m and R are the values indicated by the modulation and coding scheme (MCS) field in the downlink control information (DCI) in the protocol obtained from the look-up table. υ represents the mother code rate. If N _info ≤ 3824, by formula four

Calculate the quantized median value of the information bits, where,

Look up the table in the protocol to get the nearest value not less than N _i ' _nfo as TBS; if N _info > 3824, formula 5

Calculate the quantized median value of the information bits, where,

If the code rate R≤1/4,

in,

otherwise,

in,

C represents the number of coding blocks.

To sum up, the TBS is determined by the time-frequency resources scheduled by PDSCH or PUSCH, and the code rate and modulation order included in the MCS. The time-frequency resource for PDSCH/PUSCH scheduling required for calculation refers to a symbol in a time slot in the time domain. The above protocol can be NR R15, and the detailed explanation of the method of determining TBS can refer to the elaboration in NR R15 protocol 38.214. According to NR R15, one slot includes 14 symbols. In the prior art, the maximum value of the coincidence number used for calculating the TBS may be 14.

In addition, in order to improve the reliability of data transmission, the NR R15 version of the protocol supports slot-based repetition (repetition) transmission of data. Specifically, the network device preconfigures a preset number of repetitions K, and the terminal device transmits the same transmission block on the same symbol allocated to each of the consecutive K time slots. It is understandable that transmission blocks transmitted on the same symbols allocated to each of the K time slots have the same size and the same content. By way of example, FIG. 1 is an example diagram of a transmission block based on time slot repetition provided in the prior art. As shown in FIG. 1, time slot n and time slot n+1 are two consecutive arbitrary time slots, time slot n includes 14 symbols, and time slot n+1 includes 14 symbols. Assuming K=2, the symbols 4 to 11 included in the time slot n are used for the first transmission of data corresponding to the TB, and the symbols 4 to 11 included in the time slot n+1 are used for the second transmission of the data corresponding to the TB. The data transmitted from symbol 4 to symbol 11 included in each time slot can be considered as a transmission block, and the data content transmitted from symbol 4 to symbol 11 included in time slot n is the same as the data transmitted from symbol 4 to symbol 11 included in time slot n+1. The data content is the same. When determining the TBS based on time slot repetition, in order not to exceed the upper limit of calculating TBS, that is, one time slot, one of K repetitions, that is, the TBS in one time slot, can be calculated according to the above method for determining TBS.

In a long term evolution (long term evolution, LTE) system, the minimum time scheduling unit is a transmission time interval (transmission time interval, TTI) with a time length of 1 ms. 5G supports not only the time-domain scheduling granularity at the time unit level, but also the time-domain scheduling granularity of micro-time units, as well as meeting the delay requirements of different services. For example, the time unit is mainly used for the eMBB service, and the micro-time unit is mainly used for the URLLC service. It should be noted that the above-mentioned time unit and micro-time unit are general terms, and a specific example may be, a time unit may be referred to as a time slot, and a micro-time unit may be referred to as a micro-slot, a non-slot (non-slot). -based) or mini-slot (mini-slot); alternatively, a time unit may be referred to as a subframe, and a micro-time unit may be referred to as a micro-subframe; other similar time-domain resource division methods are not limited. In the following, time slots and mini-slots are used as examples for illustration, wherein, for example, a time slot may include 14 time-domain symbols, and the number of time-domain symbols included in a mini-slot is less than 14, such as 2, 3, 4, 5 , 6 or 7, etc.; or, for example, a time slot may include 7 time-domain symbols, and the number of time-domain symbols included in a mini-slot is less than 7, such as 2 or 4, etc. The specific value is not limited. The time-domain symbols here may be orthogonal frequency division multiplexing (OFDM) symbols. For a time slot with a subcarrier spacing of 15 kHz (kilohertz, kHz), including 6 or 7 time domain symbols, the corresponding time length is 0.5ms; for a time slot with a subcarrier spacing of 60 kHz, the corresponding time The length is shortened to 0.125ms.

Since URLLC has high requirements for delay, in the prior art, time-domain scheduling granularity based on mini-slots can be used, and data is sent in small packets with a small amount of data to meet the low-latency feature of URLLC. Usually 32 bytes (byte, ie 256bits) can be defined as a small packet. Similarly, in order to improve the reliability of data transmission, data may be repeatedly transmitted based on mini-slot based. By way of example, FIG. 2 is an example diagram of a transmission block based on mini-slot repetition provided in the prior art. As shown in Fig. 2, it is assumed that the time slot n includes 14 symbols, the mini-slot includes 4 symbols, K=2, and the symbols 4 to 7 included in the time slot n are the first mini-slot, which is used for the first time To transmit the data corresponding to the TB, the symbols 8 to 11 included in the time slot n are the second mini-slot, which is used for the second transmission of the data corresponding to the TB. The data transmitted every 4 symbols can be considered as a transport block.

In the case of repeating data transmission based on mini-slots, the time-domain resources required for repeating mini-slots may not exceed one time slot, that is, the upper limit of time-domain symbols specified for calculating TBS in the prior art cannot be reached. For example, if a mini-slot has 2 symbols and the configuration repetition times is 4, a total of 8 symbols are required to complete the transmission, which is less than one time slot (14 symbols). Therefore, when data is repeatedly transmitted based on mini-slots, it is not necessary to calculate and obtain the TBS based on mini-slot repetition according to the above calculation method of TBS based on time-slot repetition. Therefore, the technical problem to be solved by this application is how to determine the TBS based on mini-slot repetition.

In order to solve the above problem, an embodiment of the present application provides a method for determining TBS. Data on the symbol corresponding to the first time unit. Then, after receiving the data carried on the symbols corresponding to the first time units for S times, the receiving device determines the TBS according to the number of REs and the modulation and coding modes included in the M first time units, and decodes the symbols corresponding to the first time units according to the TBS data on. where M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the first time unit, S is an integer, S is greater than or equal to 1 and less than or equal to K. Therefore, TBS can be calculated using symbols occupied by all or part of the transport blocks in the preset repetition times based on mini-slot repetitions without exceeding the upper limit of the number of symbols used for calculating TBS.

It should be noted that, the first time unit described in this embodiment of the present application may be the aforementioned micro-time unit, micro-slot, non-slot or mini-slot, and the second time unit may be the aforementioned time unit. In addition, for uplink transmission, the sending device may be a terminal device, and the receiving device may be a base station, and the data that is repeatedly sent S times on the symbol corresponding to the first time unit is uplink data; for downlink transmission, the sending device may be a base station, and the receiving device may be a base station. The device may be a terminal device, and repeatedly transmits data carried on the symbol corresponding to the first time unit for S times as downlink data.

The implementation of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 3 shows an exemplary diagram of an architecture of a mobile communication system that can be applied to an embodiment of the present application. As shown in FIG. 3 , the mobile communication system includes a core network device 301 , a network device 302 and at least one terminal device (the terminal device 303 and the terminal device 304 as shown in FIG. 3 ). The terminal device is connected with the network device in a wireless way, and the network device is connected with the core network device in a wireless or wired way. The core network device and the network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the network device can be integrated on the same physical device, or part of the core network can be integrated into one physical device. The functionality of the device and part of the functionality of the network device. Terminal equipment can be fixed or movable. FIG. 3 is only a schematic diagram, the mobile communication system may also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in FIG. 3 . The embodiments of the present application do not limit the number of core network devices, network devices, and terminal devices included in the mobile communication system.

The terminal device may be a wireless terminal device capable of receiving network device scheduling and instruction information, and the wireless terminal device may be a device that provides voice and/or data connectivity to users, or a handheld device with a wireless connection function, or a device connected to Other processing equipment for wireless modems. A wireless end device may communicate with one or more core networks or the Internet via a radio access network (eg, a radio access network, RAN), and the wireless end device may be a mobile end device such as a mobile phone (or "cellular" phone) , mobile phone (mobile phone), computer and data card, for example, may be portable, pocket, hand-held, computer built-in or vehicle mounted mobile devices that exchange language and/or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), tablets Computer (Pad), computer with wireless transceiver function and other equipment. Wireless terminal equipment may also be referred to as a system, subscriber unit, subscriber station, mobile station (mobile station), mobile station (MS), remote station (remote station), access point ( access point (AP), remote terminal (remote terminal), access terminal (access terminal), user terminal (user terminal), user agent (user agent), subscriber station (SS), user terminal equipment (customer premises equipment, CPE), terminal (terminal), user equipment (user equipment, UE), mobile terminal (mobile terminal, MT), etc. For URLLC application scenarios, the terminal devices can be wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, and smart grids. wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, and so on.

The network device may be a base station (BS), a base station controller, an evolved base station (eNodeB), etc. for wireless communication. It may also be called a wireless access point, a transceiver station, a relay station, a cell, a transmit and receive port (TRP) and so on. Specifically, a network device is a device deployed in a wireless access network to provide wireless communication functions for terminal devices, and its main functions include one or more of the following functions: management of wireless resources, Internet Protocol (IP) ) header compression and encryption of user data streams, selection of mobility management entity (MME) when user equipment is attached, routing of user plane data to service gateway (SGW), organization and transmission of paging messages , organization and transmission of broadcast messages, configuration of measurements and measurement reports for mobility or scheduling purposes, and so on. Network equipment may include various forms of cellular base stations, home base stations, cells, wireless transmission points, macro base stations, micro base stations, relay stations, wireless access points, and the like. In systems using different radio access technologies, the names of the devices with network device functions may vary. For example, in a 5G NR system, it is called a 5G base station (generation Node B, gNB) and so on. As communication technology evolves, the names of network devices may change. In addition, in other possible cases, the network device may be other devices that provide wireless communication functions for the terminal device. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device. For convenience of description, in this embodiment of the present application, a device that provides a wireless communication function for a terminal device is referred to as a network device.

This application is mainly applied to the 5G NR system. The present application can also be applied to other communication systems. As long as there is an entity in the communication system that needs to send the transmission direction indication information, another entity needs to receive the indication information and determine the transmission direction within a certain period of time according to the indication information. By way of example, FIG. 4 is an example diagram of a communication system provided by an embodiment of the present application. As shown in FIG. 4 , the base station and terminal equipment 1 to terminal equipment 6 form a communication system. In this communication system, the terminal equipment 1 to the terminal equipment 6 can send uplink data to the base station, and the base station receives the uplink data sent by the terminal equipment 1 to the terminal equipment 6 . The base station may also send downlink data to terminal equipment 1 to terminal equipment 6, and terminal equipment 1 to terminal equipment 6 receive the downlink data. In addition, the terminal device 4 to the terminal device 6 may also form a communication system. In this communication system, the terminal device 5 can receive the uplink information sent by the terminal device 4 or the terminal device 6 , and the downlink information sent by the terminal device 5 to the terminal device 4 or the terminal device 6 .

Network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water; can also be deployed in the air on aircraft, balloons and satellites. The embodiments of the present application do not limit the application scenarios of the network device and the terminal device.

Communication between network equipment and terminal equipment and between terminal equipment and terminal equipment can be performed through licensed spectrum (licensed spectrum), or through unlicensed spectrum (unlicensed spectrum), or through both licensed spectrum and unlicensed spectrum. communication. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.

The embodiments of the present application may be applicable to downlink signal transmission, uplink signal transmission, and device to device (device to device, D2D) signal transmission. For D2D signal transmission, the sending device is a terminal device, and the corresponding receiving device is also a terminal device. For uplink signal transmission, the sending device is a terminal device, the corresponding receiving device is a network device, and the data carried on the symbol corresponding to the first time unit repeatedly sent S times according to the TBS is uplink data. For downlink signal transmission, the sending device is a network device, the corresponding receiving device is a terminal device, and the TBS repeatedly transmits data carried on a symbol corresponding to the first time unit for S times as downlink data.

The method for determining the size of the transport block will be described in detail below by taking uplink signal transmission as an example. FIG. 5 is a flowchart 1 of a method for determining the size of a transport block provided by an embodiment of the present application. In this embodiment of the present application, it is assumed that the first time unit is a mini-slot, and the second time unit is a time slot. The time-domain resources required to repeatedly transmit data based on mini-slots are within one slot. As shown in Figure 5, the method may include:

S501. The terminal device determines the TBS according to the number of REs included in the M mini-slots and the modulation and coding mode.

Wherein, M is an integer greater than or equal to 1 and less than or equal to K. K represents the pre-configured number of times to repeatedly transmit the data carried on the symbol corresponding to the mini-slot, and K is an integer greater than or equal to 2. In practical applications, the preset number of repetitions K may be pre-configured through a high-level parameter, and the high-level parameter may be repK. Alternatively, the preset number of repetitions K may also be dynamically indicated by the DCI. The following descriptions in the present application take K as an example of the preset number of repetitions. According to the different number of symbols included in the mini-slot, the preset number of repetitions K may take different values.

Exemplarily, it is assumed that one slot includes 14 symbols. If the mini-slot includes 2 symbols, the preset number of repetitions K may be 2, 3, 4, 5, 6 or 7. Correspondingly, 2 minislots include 2 symbols, 3 minislots include 6 symbols, 4 minislots include 8 symbols, 5 minislots include 10 symbols, 6 minislots include 12 symbols, and 7 minislots include 10 symbols. A mini-slot includes 14 symbols. Alternatively, the mini-slot includes 3 symbols, and the preset number of repetitions K may be 2, 3 or 4. Alternatively, the mini-slot includes 4 symbols, and the preset number of repetitions K may be 2 or 3. Alternatively, the mini-slot includes 5 symbols, and the preset number of repetitions K may be 2. Alternatively, the mini-slot includes 6 symbols, and the preset number of repetitions K may be 2. Alternatively, the mini-slot includes 7 symbols, and the preset number of repetitions K may be 2.

The method for determining the TBS is described below with different values of M respectively.

In a first possible implementation manner, the sending device may determine the size of the transport block according to the number of REs included in the K mini-slots and the modulation and coding manner, that is, M=K. Specifically, the following steps may be included:

确定K个迷你时隙包括的RE数。其中，N_RE″表示K个迷你时隙包括的RE数；

表示一个PRB中频域上的载波数，或者基于迷你时隙重复传输数据所占用的时域单位所对应的载波数，例如，

时域单元也可以称为时间单元，

表示K个迷你时隙内重复的所有PUSCH或PDSCH占用的符号数，例如，一个迷你时隙包括2个符号，K＝4，

其中，

表示一个PRB中DMRS所占的RE数，包括DMRS开销，

表示是由高层参数PUSCH-servingcellconfig中的xOverhead参数配置的开销。First, the number of REs included in the K mini-slots is determined. Specifically, using formula six

Determine the number of REs included in the K mini-slots. Wherein, N _RE ″ represents the number of REs included in the K mini-slots;

Indicates the number of carriers in the frequency domain in a PRB, or the number of carriers corresponding to the time-domain unit occupied by the repeated transmission of data based on mini-slots, for example,

A time domain unit can also be called a time unit,

Indicates the number of symbols occupied by all PUSCH or PDSCH repeated in K mini-slots, for example, a mini-slot includes 2 symbols, K=4,

in,

Indicates the number of REs occupied by DMRS in a PRB, including the DMRS overhead,

Indicates that the overhead is configured by the xOverhead parameter in the upper layer parameter PUSCH-servingcellconfig.

Second, the number of REs used to calculate the TBS is determined according to the number of REs included in the K mini-slots. Specifically, the number of REs used to calculate TBS is obtained by formula 7 N _RE =min(156, N _RE ″)·n _PRB , where N _RE represents the number of REs used to calculate TBS, and n _PRB represents the number of PRBs.

计算信息比特的量化中间值，其中，

在协议中查表得到不小于N'_info最近的一个值作为TBS；或者，如果N_info＞3824，通过公式五

计算信息比特的量化中间值，其中，

如果码率R≤1/4，

其中，

否则，

其中，

C表示编码块的数目。Third, the TBS is determined according to the number of REs used to calculate the TBS. Specifically, the number of information bits is obtained by formula 3 N _info =N _RE ·R·Q _m ·υ. Among them, Q _m is the modulation order, R is the code rate, and Q _m and R are obtained by looking up the table in the protocol through the values indicated by the MCS field in the DCI. υ represents the bit rate of the mother code. If N _info ≤ 3824, by formula four

Calculate the quantized median value of the information bits, where,

Look up the table in the protocol to get the nearest value not less than N' _info as TBS; or, if N _info > 3824, use formula 5

Calculate the quantized median value of the information bits, where,

If the code rate R≤1/4,

in,

otherwise,

in,

C represents the number of coding blocks.

Optionally, not only can the TBS be obtained through the above formulae 3 to 5, but also the TBS can be obtained by looking up a table according to the number of REs and the modulation and coding mode. Specifically, the TBS is obtained by querying a transport block size table (transport block size table, TBST) according to the index used for calculating the number of REs and the modulation and coding scheme of the TBS. As shown in Table 1.

Table 1

The value of the TBS in the above Table 1 is determined by the modulation and coding mode, the number of REs used to calculate the TBS, and the overhead. For example, N _TBS =N _RE *coderate*Q _m -overhead, and round up the calculated value. Among them, N _TBS represents the value, N _RE represents the number of REs, coderate represents the target code rate, Q _m represents the modulation order, and overhead represents the overhead. The overhead may be reference signal overhead and/or system loss. The target code rate and modulation order can be obtained from the MCS table in NR R15 protocol 38.213. For example, as shown in Table 2.

Table 2

Wherein, when the high-level parameter PUSCH-tp-pi2BPSK is configured, that is, the modulation mode is (pi/2)BPSK, and the modulation order is 1, q=1, and in other cases, q=2.

In the prior art, if an entire block of resources (such as one time slot or n time slots) is directly configured to transmit data corresponding to a TB, the first transmission occasion (transmission occasion) is missed when the entire block of resources is transmitted. TO), it is necessary to miss the configured whole block of resources, and retransmit the data corresponding to the TB in the next whole block of resources. For downlink transmission, the so-called miss means that the beginning of the entire block of resources is an uplink symbol and downlink data cannot be transmitted. Exemplarily, as shown in Figure 1, symbol 4 of time slot n is an uplink symbol. If downlink data needs to be transmitted on symbol 4, it is necessary to miss the entire time slot n. When waiting for time slot n+1 to arrive, if the time slot Symbol 4 of n+1 is a downlink symbol, so downlink data can be transmitted on symbol 4 of time slot n+1. Similarly, for uplink transmission, the so-called miss means that the beginning of the entire block of resources is a downlink symbol and uplink data cannot be transmitted. Alternatively, the entire resource is a grant free resource. The so-called transmission opportunity can be understood as the opportunity to transmit a copy, and the copy can refer to the data that needs to be repeatedly transmitted. The first transmission opportunity refers to the opportunity to transmit the copy for the first time. The first copy refers to the data that was transferred for the first time.

However, flexibility in the transmission starting point can be achieved when data is repeatedly transmitted based on mini-slots. The first transmission opportunity in K is t, and the first transmission opportunity is the first transmission opportunity of data carried on the symbol corresponding to the mini-slot, where t is a positive integer greater than or equal to 1 and less than or equal to K. For example, when repeating the transmission of K copies, if the first copy of data is repeatedly transmitted based on mini-slots, the first symbol of the first mini-slot cannot be sent, such as the first symbol of the first mini-slot. If the symbol is a downlink symbol and cannot transmit uplink data, the transmission of the first copy can be postponed to the next transmission opportunity (such as the first symbol of the second mini-slot), and so on until the first copy can be transmitted. mini-slots. If the transmission opportunity is not determined in the time slot where the K mini-slots are located, the transmission time is determined in the next time slot. Exemplarily, as shown in Figure 2, the symbol 4 of the first mini-slot in the time slot n is an uplink symbol. If downlink data needs to be transmitted on symbol 4, it is necessary to miss the first mini-slot and wait for it to arrive. In the second mini-slot, if the symbol 8 of the second mini-slot is a downlink symbol, the downlink data can be transmitted on the symbol 8 of the second mini-slot.

It should be noted that, in a possible implementation manner, the number of symbols included in the K mini-slots is based on the scheduling of transmission (grant-based), that is, the time domain resource selected when determining the TBS is K in a time slot. The number of symbols scheduled for the second repetition, S=K-t+1, represents the actual repetition times of the data carried on the symbol corresponding to the mini-slot repeatedly transmitted in the time slot. Exemplarily, as shown in FIG. 2 , K=2, t=1, and S=1, indicating that the actual repetition times of the data carried on the symbol corresponding to the mini-slot is repeated once in the time slot. Or, as shown in FIG. 6 , assuming that a mini-slot includes 2 symbols, K=4, t=2, S=3, it means that the actual repetition of the data carried on the symbol corresponding to the mini-slot is repeatedly transmitted in the time slot The number of times is 3 times.

In another possible implementation manner, the number of symbols included in the K mini-slots is based on grant-free transmission, and the time-domain resources selected when determining the TBS are required for K repetitions in a time slot The number of symbols of , S=K, represents the actual number of times the data carried on the symbol corresponding to the mini-slot is repeatedly transmitted in the time slot. The so-called "required" time-frequency resources whose number of symbols is repeated K times are not dynamically scheduled by the network device, but are directly transmitted on the pre-configured time-frequency resources without scheduling. Exemplarily, as shown in FIG. 7 , it is assumed that a mini-slot includes 2 symbols, K=4, t=2, S=4, indicating that the data carried on the symbols corresponding to the mini-slot is repeatedly transmitted in the time slot. The actual number of repetitions is 4. The fourth copy can be transmitted using the fifth minislot. Optionally, K replicas are actually transmitted, and the symbols occupied by the K mini-slots may span two time slots. As an example, as shown in FIG. 8 , it is assumed that a mini-slot includes 4 symbols, K=4, t=2, S=4, which indicates that the data carried on the symbols corresponding to the mini-slot is repeatedly transmitted in the time slot. The number of repetitions is 4 times. The last two symbols used by the second transport block, and the symbols used by the third and fourth transport blocks are symbols in slot n+1.

In addition, in the prior art, if the actual repetition times are less than the preconfigured repetition times when data is repeatedly transmitted based on time slots, the packet error rate of the actual repetition times is smaller than the packet error rate of the preconfigured repetition times. Assuming that the block error rate (BLER) of one transmission is 10-1, the packet error rate of 10-4 can be achieved through four repetitions. However, the actual number of repetitions is 3, and only a reliable packet error rate of 10-3 can be achieved. Therefore, when the preconfigured repetitions cannot be guaranteed, the reliability of the transmission suffers. However, the repeated transmission of data based on mini-slots described in the embodiments of the present application realizes the flexibility of the transmission starting point, and the next transmission opportunity may still be within this time slot. Therefore, K repeated transmissions can also be implemented, or K-t +1 transmission, when the pre-configured repetition times are guaranteed, the reliability of the transmission is also guaranteed, which can effectively improve the reliability. Even if the actual number of repetitions is less than the preconfigured number of repetitions, the reliability of transmission is higher than that in the prior art when the number of preconfigured repetitions is reduced.

In the second possible implementation manner, the sending device may determine the size of the transport block according to the number of REs included in one mini-slot and the modulation and coding manner, that is, M=1. Specifically, the same area as the first possible implementation above is that when determining the number of REs included in K mini-slots, the number of symbols occupied by all PUSCH or PDSCH repeated in one mini-slot is used, and other methods For the steps, reference may be made to the detailed description in the first possible implementation manner, and details are not described herein again in this embodiment of the present application.

In the prior art, when data is repeatedly transmitted based on time slots, 1-2 symbols in each time slot are used to carry DMRS. In the case of data transmission based on mini-slots, the unit of mini-slots is small, generally 2, 4 or 7 symbols. If 1-2 symbols in the symbols included in the mini-slot are also used to carry the DMRS, the overhead is too large for mini-slot scheduling. Therefore, a method of DMRS sharing (DMRS sharing) is proposed. Specifically, it is not necessary to configure or schedule DMRS for each mini-slot, but configure or schedule DMRS for one mini-slot. Several mini-slots share this DMRS, and the receiving device performs channel estimation on the physical channel after receiving the DMRS. , as shown in Figure 9, the DMRS is configured in the first symbol in the first mini-slot and the third mini-slot respectively, and the second mini-slot can share the first one in the first mini-slot. For the DMRS configured by the symbol, the fourth minislot can share the DMRS configured by the first symbol in the third minislot, so that the receiving device can correctly demodulate the PUCCH or PUSCH carried on the aforementioned several minislots.

In this case, only one symbol in the first mini-slot and third mini-slot can be used to transmit PUCCH or PUSCH, and two symbols in the second and fourth mini-slot can be used It can be used to transmit PUCCH or PUSCH, resulting in that when determining TBS based on mini-slot repetition, the TBS of mini-slots carrying DMRS and mini-slots not carrying DMRS are different.

In this embodiment of the present application, an associated scaling factor may be configured for a mini-slot based on mini-slot repetition, and the scaling factor is related to whether the symbol on the associated mini-slot has a symbol to carry DMRS. For example, after determining the transport block size according to the number of REs included in one mini-slot and the modulation and coding scheme, if the symbols corresponding to the P mini-slots carry DMRS, adjust the TBS according to the first scaling factor to obtain the first adjusted TBS , the first scaling factor is greater than 1, P is an integer, and P is greater than or equal to 1 and less than K. If all symbols corresponding to the first time unit are used to carry PUSCH or PDSCH, adjust the TBS according to the second scale factor to obtain the second adjusted TBS, and the second scale factor is less than 1. The scaling factor can be pre-configured through high-layer parameters, or can be dynamically indicated by the DCI. Therefore, it is guaranteed that when selecting the number of REs included in a mini-slot to calculate the TBS based on mini-slot repetition, the TBS obtained by multiplying the TBS of the replica itself by the scaling factor is consistent with the average TBS of all repeated replicas, The adjusted TBS is used as the TBS based on mini-slot repetition.

S502. The terminal device repeatedly sends the data carried on the symbol corresponding to the mini-slot for S times.

The number of bits corresponding to the TBS is mapped to the symbol corresponding to one mini-slot, and the data carried on the symbol corresponding to the mini-slot is repeatedly sent S times through S mini-slots. S is an integer, and S is greater than or equal to 1 and less than or equal to K. In the actual data transmission process, the data carried on the symbol corresponding to the mini-slot can be repeatedly sent K times based on the mini-slot according to the pre-configured repetition times, or the data carried in the mini-slot can be repeatedly transmitted based on the mini-slot according to less than the pre-configured repetition times. The data on the symbol corresponding to the mini-slot. S represents the actual repetition times of repeating transmission of data carried on the symbol corresponding to the mini-slot in the time slot.

S503, the network device receives data carried on symbols corresponding to the mini-slot for S times.

S504. The network device determines the TBS according to the number of REs and the modulation and coding modes included in the M mini-slots.

For the specific explanation of S503, reference may be made to the detailed explanation of S501, and details are not described herein again in this embodiment of the present application.

S505, the network device decodes the data on the symbol corresponding to the mini-slot according to the TBS.

The data may be demodulated and decoded according to the modulation and coding manner, and the specific reference may be made to the prior art, which will not be repeated in this embodiment of the present application.

In addition, the main difference between the repeated transmission of data based on mini-slots and the repeated transmission of data based on time-slots is that, first, the data carried on the symbols corresponding to the mini-slots can be transmitted in consecutive time slots, and at different consecutive times. The symbols used for transmission within the slot are different; secondly, the mini-slots used for repeated transmission of data carried on the symbols corresponding to the mini-slots are also consecutive; third, there are at least two copies in a slot or all.

In the method for determining the size of the transport block provided by the embodiment of the present application, the size of the transport block is determined according to the number of REs included in K mini-slots and the modulation and coding scheme, or the transport block is determined according to the number of REs included in one mini-slot and the modulation and coding scheme Therefore, the TBS can be calculated using the symbols occupied by all or part of the transport blocks in the preset repetition times based on mini-slot repetition without exceeding the upper limit of the number of symbols used for calculating the TBS.

Optionally, in practical applications, the time-domain resources required for repeated data transmission based on mini-slots may also exceed the time-frequency resources included in one time slot. Exemplarily, it is assumed that one slot includes 14 symbols. If the mini-slot includes 2 symbols, the preset number of repetitions K is at least 8. Correspondingly, 8 mini-slots include 16 symbols, and the duration of the 8 mini-slots is greater than the duration of one slot. Alternatively, the mini-slot includes 3 symbols, and the preset number of repetitions K is at least 5 times. Correspondingly, 5 mini-slots include 15 symbols, and the duration of the 5 mini-slots is greater than the duration of one slot. Alternatively, the mini-slot includes 4 symbols, and the preset number of repetitions K is at least 4 times. Alternatively, the mini-slot includes 5 symbols, and the preset number of repetitions K is at least 3 times. Alternatively, the mini-slot includes 6 symbols, and the preset number of repetitions K is at least 3 times. Alternatively, the mini-slot includes 7 symbols, and the preset number of repetitions K is at least 3 times. The following describes a method for determining the size of a transport block when the time-domain resources required for repeated data transmission based on mini-slots may also exceed the time-frequency resources included in one time slot.

FIG. 10 is a second flowchart of a method for determining the size of a transport block provided by an embodiment of the present application. In the embodiment of the present application, it is assumed that the time domain resources required for repeated data transmission based on mini-slots exceed one time slot. As shown in Figure 10, the method may include:

S1001. The terminal device determines the TBS according to the number of REs corresponding to the reference duration and the modulation and coding mode.

In one possible implementation, the reference duration may be equal to the duration of the time slot. Exemplarily, as shown in FIG. 11 , it is assumed that a time slot includes 14 symbols; a mini-slot includes 4 symbols, K=4, and 4 mini-slots include 16 symbols, then the duration of 4 mini-slots The duration is greater than one time slot, that is, the last two symbols of the 4th mini-slot do not belong to the symbols of time slot n, but are the first symbol (symbol 0) and the second symbol (symbol 1 of time slot n+1) ). In this case, the number of REs in a time slot can be determined according to the number of symbols scheduled by PUSCH or PDSCH in a time slot, and then the number of REs for calculating TBS can be determined according to the number of REs in a time slot, and the number of REs for calculating TBS can be determined according to the number of REs in a time slot. number to determine TBS. For details, reference may be made to the detailed description in S501, and details are not described herein again in this embodiment of the present application.

In another possible implementation manner, the reference duration is equal to the duration of R mini-slots, where R is the largest integer smaller than K, and the reference duration is less than the duration of the slot.

Exemplarily, as shown in FIG. 11 , one mini-slot includes 4 symbols, and K=4. In this case, 3 mini-slots can be determined according to the number of symbols scheduled by PUSCH or PDSCH in one 3 mini-slots. The number of REs in the slot, R=3, and then the number of REs for calculating TBS is determined according to the number of REs in the three mini-slots, and the TBS is determined according to the number of REs for calculating TBS. For details, reference may be made to the detailed description in S501, and details are not described herein again in this embodiment of the present application.

In addition, the flexibility of the transmission starting point can be achieved when data is repeatedly transmitted based on mini-slots. The first transmission opportunity in K is t, and the first transmission opportunity is the first transmission opportunity of data carried on the symbol corresponding to the mini-slot, where t is a positive integer greater than or equal to 1 and less than or equal to K. For example, as shown in Figure 11, if the symbol 0 in the time slot n is an uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be transmitted for the first time as the uplink data, at this time, t=1, indicating the first A mini-slot can be used to transmit upstream data. Similarly, if the symbol 0 in the time slot n is a downlink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, at this time, t=1, indicating the first mini-slot Can be used to transmit downlink data. Accordingly, R may be equal to 3. However, if the symbol 0 in the time slot n is an uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, in this case, it is necessary to wait for the arrival of the second mini-slot. , determine whether the first symbol (symbol 4) of the second mini-slot is a downlink symbol, if the first symbol (symbol 4) of the second mini-slot is a downlink symbol, t=2, indicating that the second A mini-slot can be used to transmit downlink data, as shown in Figure 12. And so on until deferring to a minislot where the first copy can be transmitted.

If the mini-slot includes 2 symbols, the preset number of repetitions K is at least 8. Correspondingly, 8 mini-slots include 16 symbols, and the duration of the 8 mini-slots is greater than the duration of one slot. If the symbol 0 in the time slot n is the uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be transmitted for the first time as the uplink data, at this time, t=1, indicating that the first mini-slot can be used for transmit upstream data. Similarly, if the symbol 0 in the time slot n is a downlink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, at this time, t=1, indicating the first mini-slot Can be used to transmit downlink data. Accordingly, R may be equal to 7. However, if the symbol 0 in the time slot n is an uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, in this case, it is necessary to wait for the arrival of the second mini-slot. , determine whether the first symbol (symbol 2) of the second mini-slot is a downlink symbol, if the first symbol (symbol 2) of the second mini-slot is a downlink symbol, t=2, indicating that the second A mini-slot can be used to transmit downlink data.

Alternatively, the mini-slot includes 3 symbols, and the preset number of repetitions K is at least 5 times. Correspondingly, 5 mini-slots include 15 symbols, and the duration of the 5 mini-slots is greater than the duration of one slot. If the symbol 0 in the time slot n is the uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be transmitted for the first time as the uplink data, at this time, t=1, indicating that the first mini-slot can be used for transmit upstream data. Similarly, if the symbol 0 in the time slot n is a downlink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, at this time, t=1, indicating the first mini-slot Can be used to transmit downlink data. Accordingly, R can be equal to 4. However, if the symbol 0 in the time slot n is an uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, in this case, it is necessary to wait for the arrival of the second mini-slot. , determine whether the first symbol (symbol 3) of the second mini-slot is a downlink symbol, if the first symbol (symbol 3) of the second mini-slot is a downlink symbol, t=2, indicating that the second A mini-slot can be used to transmit downlink data.

Alternatively, the mini-slot includes 5 symbols, and the preset number of repetitions K is at least 3 times. If the symbol 0 in the time slot n is the uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be transmitted for the first time as the uplink data, at this time, t=1, indicating that the first mini-slot can be used for transmit upstream data. Similarly, if the symbol 0 in the time slot n is a downlink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, at this time, t=1, indicating the first mini-slot Can be used to transmit downlink data. Accordingly, R may be equal to 2. However, if the symbol 0 in the time slot n is an uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, in this case, it is necessary to wait for the arrival of the second mini-slot. , determine whether the first symbol (symbol 5) of the second mini-slot is a downlink symbol, if the first symbol (symbol 5) of the second mini-slot is a downlink symbol, t=2, indicating that the second A mini-slot can be used to transmit downlink data.

Alternatively, the mini-slot includes 6 symbols, and the preset number of repetitions K is at least 3 times. If the symbol 0 in the time slot n is the uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be transmitted for the first time as the uplink data, at this time, t=1, indicating that the first mini-slot can be used for transmit upstream data. Similarly, if the symbol 0 in the time slot n is a downlink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, at this time, t=1, indicating the first mini-slot Can be used to transmit downlink data. Accordingly, R may be equal to 2. However, if the symbol 0 in the time slot n is an uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, in this case, it is necessary to wait for the arrival of the second mini-slot. , determine whether the first symbol (symbol 6) of the second mini-slot is a downlink symbol, if the first symbol (symbol 6) of the second mini-slot is a downlink symbol, t=2, indicating that the second A mini-slot can be used to transmit downlink data.

Alternatively, the mini-slot includes 7 symbols, and the preset number of repetitions K is at least 3 times. If the symbol 0 in the time slot n is the uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be transmitted for the first time as the uplink data, at this time, t=1, indicating that the first mini-slot can be used for transmit upstream data. Similarly, if the symbol 0 in the time slot n is a downlink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, at this time, t=1, indicating the first mini-slot Can be used to transmit downlink data. Accordingly, R may be equal to 2. However, if the symbol 0 in the time slot n is an uplink symbol, and the data carried on the symbol corresponding to the mini-slot needs to be sent for the first time as the down-link data, in this case, it is necessary to wait for the arrival of the second mini-slot. , determine whether the first symbol (symbol 7) of the second mini-slot is a downlink symbol, if the first symbol (symbol 7) of the second mini-slot is a downlink symbol, t=2, indicating that the second A mini-slot can be used to transmit downlink data.

S1002 , the terminal device repeatedly transmits the data carried on the symbol corresponding to the mini-slot for S times.

The number of bits corresponding to the TBS is mapped to the symbol corresponding to one mini-slot, and the data carried on the symbol corresponding to the mini-slot is repeatedly sent S times through S mini-slots. S is an integer, and S is greater than or equal to 1 and less than or equal to K. In the actual data transmission process, the data carried on the symbol corresponding to the mini-slot can be repeatedly sent K times based on the mini-slot according to the pre-configured repetition times, or the data carried in the mini-slot can be repeatedly transmitted based on the mini-slot according to less than the pre-configured repetition times. The data on the symbol corresponding to the mini-slot.

S1003. The network device receives data carried on symbols corresponding to the mini-slot for S times.

S1004, the network device determines the TBS according to the number of REs corresponding to the reference duration and the modulation and coding mode.

For the specific explanation of S1004, reference may be made to the detailed explanation of S1001, and details are not described herein again in this embodiment of the present application.

S1005, the network device decodes the data on the symbol corresponding to the mini-slot according to the TBS.

In the method for determining the size of the transport block provided by the embodiment of the present application, when the duration of the K mini-slots is greater than the duration of one slot, the TBS can be determined according to the number of REs corresponding to the reference duration and the modulation and coding mode. The TBS is calculated for the symbols occupied by all or part of the transport blocks in the preset number of repetitions of the mini-slot repetition.

For downlink signal transmission, the sending device is a network device, the corresponding receiving device is a terminal device, and the TBS repeatedly transmits data carried on a symbol corresponding to the first time unit for S times as downlink data. For the process of determining the size of the transmission block in the process of downlink signal transmission, the execution bodies in FIG. 5 and FIG. 10 may be exchanged. For a detailed explanation, reference may be made to the method steps shown in FIG. 5 and FIG. 10 . This embodiment of the present application does not Repeat.

In the above-mentioned embodiments provided by the present application, the methods provided by the embodiments of the present application are respectively introduced from the perspectives of the terminal device, the network device, and the interaction between the terminal device and the network device. It can be understood that each network element, such as a terminal device and a network device, includes hardware structures and/or software modules corresponding to each function in order to implement the functions in the methods provided by the above embodiments of the present application. Those skilled in the art should easily realize that the present application can be implemented in hardware or in the form of a combination of hardware and computer software, in conjunction with the algorithm steps of the examples described in the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the terminal device and the network device may be divided into functional modules according to the above method examples. For example, each functional module may be divided into each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

In the case where each functional module is divided according to each function, FIG. 13 shows a possible composition example of the apparatus for determining the size of the transport block involved in the above and the embodiments. Figure 1, the apparatus for determining the size of the transport block can execute Steps performed by the terminal device in any of the method embodiments of the present application. As shown in FIG. 13 , the apparatus for determining the size of the transport block is a terminal device or a device for determining the size of the transport block that supports the terminal device to implement the method provided in the embodiment, for example, the apparatus for determining the size of the transport block may be a chip system. The apparatus for determining the size of the transport block may include: a processing unit 1301 , a sending unit 1302 and a receiving unit 1303 .

For uplink signal transmission, the processing unit 1301 is configured to support the apparatus for determining the size of the transport block to perform the method described in the embodiments of the present application. For example, the processing unit 1301, configured to execute or support the apparatus for determining the transport block size, executes S501 in the method for determining the transport block size shown in FIG. 5 , and S1001 in the method for determining the transport block size shown in FIG. 10 .

The sending unit 1302 is configured to send data, for example, to support the apparatus for determining the transport block size to perform S502 in the method for determining the transport block size shown in FIG. 5 , and S1002 in the method for determining the transport block size shown in FIG. 10 .

For downlink signal transmission, the receiving unit 1303 is configured to support the apparatus for determining the size of the transport block to perform the method described in the embodiments of the present application. For example, the receiving unit 1303 is configured to receive data, for example, to support the apparatus for determining the transport block size to perform S503 in the method for determining the transport block size shown in FIG. 5 , and S503 in the method for determining the transport block size shown in FIG. 10 . S1003.

The processing unit 1301 is configured to perform or support the apparatus for determining the transport block size to perform S504 and S505 in the method for determining the transport block size shown in FIG. 5 , and S1004 and S505 in the method for determining the transport block size shown in FIG. 10 . S1005.

It should be noted that, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here.

The apparatus for determining the size of the transport block provided by the embodiment of the present application is used to execute the method of any of the foregoing embodiments, and thus can achieve the same effect as the method of the foregoing embodiment.

The entity device corresponding to the receiving unit may be a receiver, the entity device corresponding to the transmitting unit may be a transmitter, and the entity device corresponding to the processing unit may be a processor.

In the case where each functional module is divided according to each function, FIG. 14 shows a possible composition example of the apparatus for determining the size of the transport block involved in the above and the embodiment. Figure 1, the apparatus for determining the size of the transport block can execute Steps performed by the network device in any of the method embodiments of the present application. As shown in FIG. 14 , the apparatus for determining the size of the transport block is a network device or a device for determining the size of the transport block that supports the network device to implement the method provided in the embodiment. For example, the apparatus for determining the size of the transport block may be a chip system. The apparatus for determining the size of the transport block may include: a processing unit 1401 , a sending unit 1402 and a receiving unit 1403 .

For uplink signal transmission, the receiving unit 1403 is configured to support the apparatus for determining the size of the transport block to perform the methods described in the embodiments of the present application. For example, the receiving unit 1403 is configured to receive data, for example, for supporting the apparatus for determining the transport block size to perform S503 in the method for determining the transport block size shown in FIG. 5 , and S503 in the method for determining the transport block size shown in FIG. 10 S1003.

The processing unit 1401 is configured to perform or support the apparatus for determining the transport block size to perform S504 and S505 in the method for determining the transport block size shown in FIG. 5 , and S1004 and S505 in the method for determining the transport block size shown in FIG. S1005.

For downlink signal transmission, the processing unit 1401 is configured to support the apparatus for determining the size of the transport block to perform the methods described in the embodiments of the present application. For example, the processing unit 1401, configured to execute or support the apparatus for determining the transport block size, performs S501 in the method for determining the transport block size shown in FIG. 5 , and S1001 in the method for determining the transport block size shown in FIG. 10 .

The sending unit 1402 is configured to send data, for example, to support the apparatus for determining the transport block size to perform S502 in the method for determining the transport block size shown in FIG. 5 , and S1002 in the method for determining the transport block size shown in FIG. 10 .

It should be noted that, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here.

The apparatus for determining the size of the transport block provided by the embodiment of the present application is used to execute the method of any of the foregoing embodiments, and thus can achieve the same effect as the method of the foregoing embodiment.

The entity device corresponding to the receiving unit may be a receiver, the entity device corresponding to the transmitting unit may be a transmitter, and the entity device corresponding to the processing unit may be a processor.

FIG. 15 shows a possible schematic structural diagram of the network device involved in the foregoing embodiment.

The network device includes transmitter/receiver 1501 , controller/processor 1502 and memory 1503 . The transmitter/receiver 1501 is used to support the sending and receiving of information between the network device and the terminal device in the above embodiments. The controller/processor 1502 performs various functions for communicating with end devices. On the uplink, the uplink signal from the terminal device is received via the antenna, mediated by the receiver 1501, and further processed by the controller/processor 1152 to recover the traffic data and signaling information sent by the terminal device . On the downlink, traffic data and signaling messages are processed by the controller/processor 1502 and mediated by the transmitter 1501 to generate downlink signals, which are transmitted to end devices via the antenna. The controller/processor 1502 also performs the processes of Figures 5 and 10 involving network devices and/or other processes for the techniques described herein. The memory 1503 is used to store program codes and data of the network device.

FIG. 16 shows a simplified schematic diagram of a possible design structure of the terminal device involved in the above embodiment. The terminal equipment includes a transmitter 1601 , a receiver 1602 , a controller/processor 1603 , a memory 1604 and a modem processor 1605 .

The transmitter 1601 is configured to transmit an uplink signal (repeatedly transmit data carried on the symbol corresponding to the first time unit S times), and the uplink signal is transmitted to the network device described in the above embodiment via an antenna. On the downlink, the antenna receives the downlink signal transmitted by the network device in the above-mentioned embodiment (repeatedly transmits the data carried on the symbol corresponding to the first time unit S times). The receiver 1602 is configured to receive the downlink signal received from the antenna (S times the data carried on the symbol corresponding to the first time unit). In modem processor 1605, encoder 1606 receives and processes traffic data and signaling messages to be sent on the uplink. Modulator 1607 further processes (eg, symbol mapping and modulation) the encoded traffic data and signaling messages and provides output samples. A demodulator 1609 processes (eg, demodulates) the input samples and provides symbol estimates. A decoder 1608 processes (eg, decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the terminal device. The encoder 1606 , modulator 1607 , demodulator 1609 and decoder 1608 may be implemented by a composite modem processor 1605 . These units are processed according to the radio access technology adopted by the radio access network.

The controller/processor 1603 controls and manages the actions of the terminal device, so as to execute the processing performed by the terminal device in the above-mentioned embodiments. For example, it is used to control the terminal equipment to determine the TBS according to the number of REs and the modulation and coding modes included in the M first time units, and to decode the data on the symbols corresponding to the first time unit according to the TBS and/or other processes of the technology described in this application. As an example, the controller/processor 1603 is configured to support the terminal device to perform the process S501 in FIG. 5 and the process S1001 in FIG. 10 .

In this embodiment of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement or The methods, steps and logic block diagrams disclosed in the embodiments of this application are executed. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

In this embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may be a volatile memory (volatile memory), such as random access Access memory (random-access memory, RAM). Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data.

From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another device, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place, or may be distributed to multiple different places . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a terminal or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available media that can be accessed by a computer, or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVDs)), or semiconductor media (eg, SSDs), and the like.

In the process of determining the TBS in the above embodiments, if the TBS is determined according to the K transmission occasions, the time-frequency resources occupied by the K transmission occasions, and the modulation and coding mode indicated by the network device, the TB corresponding to the determined TBS is determined. The transmission code rate can be obtained by carrying the transmission on the time-frequency resources occupied by a transmission opportunity. The transmission code rate can also be understood as the number of bits when the TB corresponding to the TBS is carried on the time-frequency resources occupied by one transmission opportunity. The code rate threshold may be the maximum number of bits that can be carried by the time-frequency resources occupied by one transmission opportunity. The transmission code rate may be greater than the code rate threshold. For example, assuming that the code rate threshold is 1, the maximum data packet that can be carried by the time-frequency resources occupied by one transmission opportunity is 100 bits. If the transmission code rate is 1.2 and a 120-bit data packet needs to be transmitted, the time-frequency resources occupied by one transmission opportunity cannot transmit the 120-bit data packet completely. One retransmission, thereby reducing the transmission efficiency and increasing the transmission delay.

In this case, the TBS needs to be recalculated, so that the reference code rate when the TB corresponding to the TBS is carried on the time-frequency resources occupied by one transmission opportunity is less than or equal to the code rate threshold. In addition, in the following, a transmission opportunity may be understood as a time unit, and a time unit may be one or more than two OFDM symbols. The time unit may also refer to a transmission opportunity or a mini-slot. For specific explanations, reference may be made to the explanations in the foregoing embodiments, which will not be repeated in the embodiments of the present application. In this embodiment of the present application, it is assumed that the first time unit is a mini-slot. The time-domain resources required to repeatedly transmit data based on mini-slots are within one slot. The method for re-determining the size of the transport block will be described in detail below by taking uplink signal transmission as an example.

In the first implementation manner, if the reference code rate is greater than the code rate threshold, the number of mini-slots used for calculating the TBS can be adjusted to overcome the reference code rate being greater than the code rate threshold. FIG. 17 is a third flowchart of a method for determining the size of a transport block provided by an embodiment of the present application. As shown in Figure 17, the method may include:

S1701. The terminal device determines the first TBS and the reference code rate according to the number of REs included in the K mini-slots, the first code rate and the first modulation order.

First, the terminal device determines the first TBS according to the number of REs included in the K mini-slots and the first modulation and coding scheme. Among them, the K mini-slots can also be understood as K transmission opportunities. K is an integer greater than or equal to 2, and K represents the number of times that the data carried on the symbol corresponding to the mini-slot is repeatedly transmitted by pre-configuration or DCI dynamic indication. For example, the PUSCH is repeatedly transmitted on the time-frequency resources corresponding to the K transmission occasions according to the number of repetitions K dynamically indicated by the DCI or configured by the high-layer parameters. "K represents the pre-configured or DCI dynamic indication of the number of times to repeatedly send the data carried on the symbol corresponding to the mini-slot" can also be described as K represents the number of times the data carried on the symbol corresponding to the mini-slot notified by the network device to repeatedly send the data on the mini-slot. The first modulation and coding manner may be indicated by the network device. The first modulation and coding mode may be used to indicate the first code rate and the first modulation order. For example, the first modulation and coding scheme may be MCS index 9. As shown in Table 3, the modulation order indicated by MCS index 9 is 2, that is, the first modulation order is 2, and the code rate indicated by MCS index 9 is 251/1024, that is, the first code rate is 251/1024.

table 3

Illustratively, the following formula 8 can be used to determine TBS: N _TBS =cd*K*N _RE *Q _m , where N _TBS represents the value of TBS, cd represents the code rate, for example, the first code rate, and N _RE represents a The number of REs included in the mini-slot, or N _RE is used to represent the number of REs included in a mini-slot for transmitting data or control information, and Q _m denotes the modulation order, for example, the first modulation order.

由此可以得出，参考码率可以为第一码率的K倍。但是，用一个迷你时隙发送该第一TBS对应的TB时，参考码率可能大于码率门限。假设第一码率为251/1024，K＝4时，即1次传输占用的时频资源为4次传输所占用的时频资源的1/4，参考码率可以为(251*4)/1024＝1004/1024。所述码率门限可以为现有协议(3GPP TS 38.214v15.3.0，6.1.4.1节)MCS表格中的最大值。例如，MCS表格中的MCS索引27指示的目标码率772/1024。1004/1024大于772/1024，即参考码率大于码率门限。Then, if the terminal device carries the TB corresponding to the N _TBS on a mini-slot for transmission, the time-frequency resources occupied by one corresponding transmission are 1/K of the time-frequency resources occupied by the K transmissions. If the first modulation order is guaranteed to remain unchanged, Formula 8 can be organized as:

From this, it can be concluded that the reference code rate may be K times the first code rate. However, when the TB corresponding to the first TBS is transmitted in one mini-slot, the reference code rate may be greater than the code rate threshold. Assuming that the first code rate is 251/1024, when K=4, that is, the time-frequency resources occupied by one transmission are 1/4 of the time-frequency resources occupied by 4 transmissions, the reference code rate can be (251*4)/ 1024=1004/1024. The code rate threshold may be the maximum value in the MCS table of the existing protocol (3GPP TS 38.214v15.3.0, section 6.1.4.1). For example, the target code rate indicated by MCS index 27 in the MCS table is 772/1024. 1004/1024 is greater than 772/1024, that is, the reference code rate is greater than the code rate threshold.

Optionally, the code rate threshold may also be a predefined or preconfigured code rate. For example, 0.95, 1, 1.33, 1.67. The so-called "predefined" may refer to pre-writing the device according to the protocol. The so-called "pre-configured" may mean that the network device is pre-indicated.

If the reference code rate is greater than the code rate threshold, the TBS should be recalculated. Instead of using the resources of K transmission opportunities to calculate TBS, use the resources of M transmission opportunities to calculate, M<K, and the first TBS determined according to M acts on The code rate corresponding to one mini-slot is less than or equal to the code rate threshold. M is the largest positive integer that satisfies the reference code rate not greater than the code rate threshold. The so-called "reference code rate" can be understood as the code rate when the TB corresponding to the first TBS is carried on the time-frequency resource occupied by one mini-slot for transmission. S1702 is executed.

S1702. The terminal device determines M according to the code rate threshold.

其中，M应满足的条件为

其中，cd_max表示码率门限。从而，保证参考码率不大于码率门限。Exemplarily, N' _TBS can be determined by formula 9: N' _TBS =cd*M*N _RE *Q _m , where N' _TBS represents the number of REs included in the M mini-slots, the first code rate and the first The value of TBS determined by the modulation order. When the TB corresponding to the N' _TBS is borne on one mini-slot, the time-frequency resources occupied by one corresponding transmission are 1/M of the time-frequency resources occupied by the M transmissions. cd indicates the code rate, for example, the first code rate, N _RE indicates the number of REs included in a mini-slot, or N _RE is used to indicate the number of REs included in a mini-slot for transmitting data or control information, Q _m indicates The modulation order, eg, the first modulation order. If the first modulation order is kept unchanged, Equation 9 can be organized as:

Among them, the condition that M should satisfy is

Among them, cd _max represents the code rate threshold. Therefore, it is guaranteed that the reference code rate is not greater than the code rate threshold.

As an example, assuming that the number of transmission opportunities K=4, the first code rate is 251/1024, the first modulation order is 2, and two RBs are used for transmission, each RB is 12 subcarriers, and each transmission opportunity is 2 symbols, The code rate threshold is 772/1024, then the calculated TBS is:

N _TBS =cd*K*N _RE *Q _m =251/1024*4*(12*2*2)*2

The TB corresponding to the N _TBS is carried on the RE of a transmission opportunity and sent, then the reference code rate is,

If the code rate threshold of 772/1024 is exceeded, the TBS needs to be re-determined, which should satisfy:

The value of M is 3.

M的取值为3。Alternatively, the code rate threshold is a predefined or preconfigured code rate. For example, the code rate threshold is 0.95.

The value of M is 3.

Optionally, M may also be predefined, pre-configured, or dynamically indicated by the DCI, and it is not necessary for the terminal device to calculate the value of M.

Optionally, if the K mini-slots are of equal length, the TBS may also be calculated using the time-frequency resources occupied by one mini-slot instead of the total time-frequency resources occupied by all mini-slots. For example, the code rate threshold is preset to 772/1024, the MCS index is 13, the first code rate is 526/1024, the first modulation order is 2, K=2, the time domain length of one mini-slot is 2 symbols, The frequency domain resource is a physical resource block (Physical Resource Block, PRB). The TBS calculated from 2 mini-slots is:

N _TBS =cd*K*N _RE *Q _m =526/1024*2*(12*2*2)*2

Therefore, if the reference code rate is 1052/1024, and the reference code rate is greater than the code rate threshold, the TBS is recalculated. Calculate TBS using the time-frequency resources occupied by one mini-slot instead of the total time-frequency resources occupied by all mini-slots:

N _TBS =cd*K*N _RE *Q _m =526/1024*2*(12*2)*2

S1703. The terminal device determines the second TBS according to the number of REs included in the M mini-slots, the first code rate, and the first adjustment order.

Specifically, the following steps may be included:

确定M个迷你时隙包括的RE数。其中，N_RE″表示M个迷你时隙包括的RE数；

表示一个PRB中频域上的载波数，或者基于迷你时隙重复传输数据所占用的时域单位所对应的载波数，例如，

时域单元也可以称为时间单元，

表示M个迷你时隙内重复的所有PUSCH或PDSCH占用的符号数，例如，一个迷你时隙包括2个符号，M＝4，

其中，

表示一个PRB中DMRS所占的RE数，包括DMRS开销，

表示是由高层参数PUSCH-servingcellconfig中的xOverhead参数配置的开销。First, the number of REs included in the M mini-slots is determined. Specifically, using formula six

Determine the number of REs included in the M mini-slots. Wherein, N _RE ″ represents the number of REs included in the M mini-slots;

Indicates the number of carriers in the frequency domain in a PRB, or the number of carriers corresponding to the time-domain unit occupied by the repeated transmission of data based on mini-slots, for example,

A time domain unit can also be called a time unit,

Indicates the number of symbols occupied by all PUSCH or PDSCH repeated in M mini-slots, for example, a mini-slot includes 2 symbols, M=4,

in,

Indicates the number of REs occupied by DMRS in a PRB, including the DMRS overhead,

Indicates that the overhead is configured by the xOverhead parameter in the upper layer parameter PUSCH-servingcellconfig.

Second, the number of REs used to calculate the TBS is determined according to the number of REs included in the M mini-slots. Specifically, the number of REs used to calculate TBS is obtained by formula 7 N _RE =min(156, N _RE ″)·n _PRB , where N _RE represents the number of REs used to calculate TBS, and n _PRB represents the number of PRBs.

计算信息比特的量化中间值，其中，

在协议中查表得到不小于N_i'_nfo最近的一个值作为TBS；或者，如果N_info＞3824，通过公式五

计算信息比特的量化中间值，其中，

如果码率R≤1/4，

其中，

否则，

其中，

C表示编码块的数目。Third, the TBS is determined according to the number of REs used to calculate the TBS. Specifically, the number of information bits is obtained by formula 3 N _info =N _RE ·R·Q _m ·υ. Among them, Q _m is the modulation order, R is the code rate, and Q _m and R are obtained by looking up the table in the protocol through the values indicated by the MCS field in the DCI. υ represents the bit rate of the mother code. If N _info ≤ 3824, by formula four

Calculate the quantized median value of the information bits, where,

Look up the table in the protocol to get the nearest value not less than N _i ' _nfo as TBS; or, if N _info > 3824, use formula 5

Calculate the quantized median value of the information bits, where,

If the code rate R≤1/4,

in,

otherwise,

in,

C represents the number of coding blocks.

S1704. The terminal device repeatedly transmits the data carried on the symbol corresponding to the mini-slot S times according to the second TBS.

S is an integer, and S is greater than or equal to 1 and less than or equal to K.

S1705. The network device receives the data carried on the symbols corresponding to the mini-slot for S times.

After receiving the data carried on the symbols corresponding to the mini-slots for S times, the network device may first determine the reference code rate according to the number of REs included in the K mini-slots, the first code rate, and the first modulation order. For specific explanations, please refer to The detailed description of S1701 is not repeated in this embodiment of the present application. If the reference code rate is greater than the code rate threshold, then M is determined according to the code rate threshold. For a specific explanation, reference may be made to the detailed description of S1702, which is not repeated in this embodiment of the present application.

S1706. The network device determines the second TBS according to the number of REs included in the M mini-slots, the first code rate, and the first modulation order.

For the specific determination of the second TBS, reference may be made to explanations in the prior art, which are not repeated in this embodiment of the present application.

S1707. The network device decodes the data on the symbol corresponding to the mini-slot according to the second TBS.

The data may be demodulated and decoded according to the modulation and coding manner, and the specific reference may be made to the prior art, which will not be repeated in this embodiment of the present application.

In the method for determining the size of the transmission block provided by the embodiment of the present application, before transmitting the data packet, by adjusting the number of mini-slots used for calculating the TBS, the reference code rate can be overcome to be greater than the code rate threshold, and the incomplete transmission of the data packet can be avoided. The decoding failure at the receiving end will result, and a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

In the second achievable manner, M=K, if the reference code rate is greater than the code rate threshold, the TBS can be determined by using the scale factor to overcome the reference code rate being greater than the code rate threshold. FIG. 18 is a fourth flowchart of a method for determining the size of a transport block provided by an embodiment of the present application. As shown in Figure 18, the method may include:

S1801. The terminal device determines the first TBS according to the number of REs included in the M mini-slots, the first code rate and the first adjustment order.

First, the terminal device determines the second TBS and the reference code rate according to the number of REs included in the K first time units, the first code rate and the first modulation order, and the reference code rate acts on the second TBS corresponding to one mini-slot. code rate. Among them, M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, K represents the pre-configuration or DCI indicates the number of times to repeatedly transmit the data carried on the symbol corresponding to the mini-slot, M= K. For example, the PUSCH is repeatedly transmitted on the time-frequency resources corresponding to the K transmission occasions according to the number of repetitions K dynamically indicated by the DCI or configured by the high-layer parameters. The first modulation and coding manner may be indicated by the network device. The first modulation and coding mode may be used to indicate the first code rate and the first modulation order. For example, the first modulation and coding scheme may be MCS index 9. As shown in Table 3, the modulation order indicated by MCS index 9 is 2, that is, the first modulation order is 2, and the code rate indicated by MCS index 9 is 251/1024, that is, the first code rate is 251/1024. Illustratively, the following formula 8 can be used to determine TBS: N _TBS =cd*K*N _RE *Q _m , where N _TBS represents the value of TBS, cd represents the code rate, for example, the first code rate, and N _RE represents a The number of REs included in the mini-slot, Q _m represents the modulation order, for example, the first modulation order.

For a specific explanation of the determination of the reference code rate, reference may be made to the detailed description of S1701, and details are not described herein again in this embodiment of the present application.

If the reference code rate is greater than the code rate threshold, the first TBS can be determined according to the scale factor, and the first TBS is smaller than the second TBS. The scale factor is greater than 0 and less than 1, and the code rate corresponding to the first TBS acting on one mini-slot is less than or equal to the code rate threshold. The scale factor may be indicated by higher layer parameters or DCI.

For the explanation of the corresponding code rate threshold, reference may be made to the above description, and details are not described herein again in this embodiment of the present application.

S1802. The terminal device repeatedly transmits the data carried on the symbol corresponding to the mini-slot S times according to the first TBS.

S1803. The network device receives data carried on symbols corresponding to the mini-slot for S times.

S1804. The network device determines the first TBS according to the number of REs included in the M mini-slots, the first code rate, and the first modulation order.

After receiving the data carried on the symbols corresponding to the mini-slots for S times, the network device determines the reference code rate according to the number of REs included in the K first time units, the first code rate and the first adjustment order. For a specific explanation, please refer to S1801 The detailed description of the embodiments of the present application will not be repeated here. If the reference code rate is greater than the code rate threshold, perform S1805.

S1805. The network device decodes the data on the symbol corresponding to the mini-slot according to the first TBS.

It should be noted that, when uplink data transmission or control information transmission is based on scheduling, the scaling factor may be dynamically indicated by DCI. When uplink data transmission or control information transmission is free of scheduling, the scaling factor may be configured by higher layer parameters, or indicated by activation DCI (activation DCI). For example, the code rate threshold is preset to 772/1024. If the network device indicates that the scale factor is 0.7, the MCS index is 13, and K=2, then the reference code rate calculated based on 2 mini-slots when the TBS is carried in one mini-slot is 1052/1024, and the reference code rate is greater than the code rate If the code rate threshold is set, the TBS needs to be adjusted according to the scale factor of 0.7. The adjusted code rate is 0.72, and 0.72 is less than the code rate threshold. In addition, if the reference code rate does not exceed the code rate threshold when the initially calculated TBS is carried on the time-frequency resource of a mini-slot, the scale factor does not need to be considered, or the terminal device considers the scale factor to be 1. If the scale factor is greater than 0.5 and the adjusted code rate is still greater than the code rate threshold, recalculate the TBS and use the time-frequency resources occupied by one mini-slot instead of the total time-frequency resources occupied by all mini-slots to calculate the TBS .

In the method for determining the size of the transmission block provided by the embodiment of the present application, before transmitting the data packet, by using the scale factor to determine the TBS, the reference code rate can be overcome to be greater than the code rate threshold, and the decoding failure at the receiving end caused by the incomplete transmission of the data packet can be avoided. , a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

In the third implementation manner, M=K, if the reference code rate is greater than the code rate threshold, the first TBS can be determined according to the preconfigured code rate, and the preconfigured code rate is less than or equal to the code rate threshold, overcoming the reference code rate greater than the bit rate threshold. FIG. 19 is a flowchart 5 of a method for determining the size of a transport block provided by an embodiment of the present application. As shown in Figure 19, the method may include:

S1901. The terminal device determines the first TBS and the reference code rate according to the number of REs included in the M mini-slots, the first code rate and the first modulation order.

For a specific explanation, reference may be made to the detailed description of S1701, which is not repeated in this embodiment of the present application.

If the reference code rate is greater than the code rate threshold, go to S1902.

S1902. The terminal device determines the second TBS according to the number of REs included in the M mini-slots, the second code rate, and the second modulation order.

For a specific explanation, reference may be made to the detailed description of S1703, which is not repeated in this embodiment of the present application.

It should be noted that the second code rate used to determine the second TBS is a code rate threshold, and the code rate corresponding to the second TBS acting on a first time unit is less than or equal to the code rate threshold. The second code rate is predefined or preconfigured. The second modulation order can be obtained by looking up from the MCS table according to the second code rate.

As an example, assuming that the code rate threshold is 772/1024, the second code rate is 1, K=2, the MCS index is 13, the first modulation order is 2, and the first code rate is 526/1024. The number of REs included in the slot, the first code rate and the first adjustment order determine the first TBS, and the number of bits represented by the first TBS is carried on the time-frequency resources occupied by a mini-slot for transmission, and the reference code rate is 1052/ 1024, the reference code rate is greater than the code rate threshold, and the second TBS is determined according to the second code rate 943/1024.

S1903. The terminal device repeatedly transmits the data carried on the symbol corresponding to the mini-slot for S times according to the second TBS.

S1904, the network device receives the data carried on the symbol corresponding to the mini-slot for S times.

After receiving the data carried on the symbols corresponding to the mini-slots for S times, the network device determines the reference code rate according to the number of REs included in the K first time units, the first code rate and the first adjustment order. For a specific explanation, please refer to S1901 The detailed description of the embodiments of the present application will not be repeated here. If the reference code rate is greater than the code rate threshold, go to S1905.

S1905. The network device determines the second TBS according to the number of REs included in the M mini-slots, the second code rate, and the second modulation order.

It should be noted that the second code rate used to determine the second TBS is a code rate threshold, and the code rate corresponding to the second TBS acting on a first time unit is less than or equal to the code rate threshold. The second code rate is predefined or preconfigured. The second modulation order can be obtained by looking up from the MCS table according to the second code rate.

S1906, the network device decodes the data on the symbol corresponding to the mini-slot according to the second TBS.

In the method for determining the size of a transmission block provided by the embodiment of the present application, before transmitting a data packet, the TBS can be determined by using a preconfigured code rate, which can overcome that the reference code rate is greater than the code rate threshold, and avoid the reception caused by incomplete transmission of the data packet. If the decoding fails at the end, a retransmission is required, thereby effectively improving the transmission efficiency and reducing the transmission delay.

In a fourth implementation manner, when the terminal device determines the first TBS according to the number of REs included in the M mini-slots, the first code rate and the first modulation order, the M used may be pre-configured, predefined or DCI Indicated and determined according to M, the code rate corresponding to the first TBS acting on a first time unit is less than or equal to the code rate threshold.

网络设备预配置或者指示的码率门限为943/1024，3682/1024大于943/1024，所以回退计算TBS。Optionally, if the mini-slots are not of equal length, the mini-slot used for calculating whether the TBS exceeds the code rate threshold may be the shortest one of the K mini-slots. For example, the number of repetitions K dynamically indicated or preconfigured by the network device is 3, the time domain length of each mini-slot is 2 symbols, 5 symbols and 7 symbols respectively, the MCS index dynamically indicated by the network device is 13, and the MCS index 13 corresponds to The modulation order is 2, and the code rate is 526/1024. When calculating the TBS, N _RE can be the time-frequency resource determined according to the (2+5+7) symbol. The number of encoded bits represented by _NTBS is carried in one mini-slot for transmission. Since the three mini-slots are not of equal length, the corresponding equivalent code rates are different. N _TBS is transmitted on 2-symbol mini-slots with a reference code rate of

The bit rate threshold preconfigured or indicated by the network device is 943/1024, and 3682/1024 is greater than 943/1024, so TBS is calculated back.

Alternatively, if the transmission opportunities are not of equal length, the mini-slot used for calculating whether the TBS exceeds the code rate threshold may also be the longest one of the K mini-slots.

For downlink signal transmission, the sending device is a network device, the corresponding receiving device is a terminal device, and the TBS repeatedly transmits data carried on a symbol corresponding to the first time unit for S times as downlink data. For the process of determining the size of the transport block in the process of downlink signal transmission, the execution bodies in FIG. 17 to FIG. 19 may be exchanged. For a detailed explanation, reference may be made to the method steps shown in FIG. 17 to FIG. 19 . Repeat.

In the above-mentioned embodiments provided by the present application, the methods provided by the embodiments of the present application are respectively introduced from the perspectives of the terminal device, the network device, and the interaction between the terminal device and the network device. It can be understood that each network element, such as a terminal device and a network device, includes hardware structures and/or software modules corresponding to each function in order to implement the functions in the methods provided by the above embodiments of the present application. Those skilled in the art should easily realize that the present application can be implemented in hardware or in the form of a combination of hardware and computer software, in conjunction with the algorithm steps of the examples described in the embodiments disclosed herein. Whether a function is performed by hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

In this embodiment of the present application, the terminal device and the network device may be divided into functional modules according to the above method examples. For example, each functional module may be divided into each function, or two or more functions may be integrated into one processing module. The above-mentioned integrated modules can be implemented in the form of hardware, and can also be implemented in the form of software function modules. It should be noted that, the division of modules in the embodiments of the present application is schematic, and is only a logical function division, and there may be other division manners in actual implementation.

In the case where each functional module is divided according to each function, FIG. 20 shows a possible composition example of the apparatus for determining the size of the transport block involved in the above and the embodiment. FIG. 3 , the apparatus for determining the size of the transport block can execute Steps performed by the terminal device in any of the method embodiments of the present application. As shown in FIG. 20 , the apparatus for determining the size of the transport block is a terminal device or a device for determining the size of the transport block that supports the terminal device to implement the method provided in the embodiment, for example, the apparatus for determining the size of the transport block may be a chip system. The apparatus for determining the size of the transport block may include: a processing unit 2001 , a sending unit 2002 and a receiving unit 2003 .

For uplink signal transmission, the processing unit 2001, configured to support the apparatus for determining the size of the transport block, executes the method described in the embodiments of the present application. For example, the processing unit 2001, configured to execute or support the apparatus for determining the transport block size, executes S1701-S1703 in the method for determining the transport block size shown in FIG. S1801, S1901-1902 in the method for determining the transport block size shown in FIG. 18 .

The sending unit 2002 is configured to send data, for example, to support the apparatus for determining the size of the transport block to perform S1704 in the method for determining the size of the transport block shown in FIG. 17 , and S1802 in the method for determining the size of the transport block shown in FIG. 18 , S1903 in the method of determining the transport block size shown in FIG. 19 .

For downlink signal transmission, the receiving unit 2003 is configured to support the apparatus for determining the size of the transport block to perform the method described in the embodiments of the present application. For example, the receiving unit 2003 is configured to receive data, for example, to support the apparatus for determining the transport block size to perform S1705 in the method for determining the transport block size shown in FIG. 17 , and S1705 in the method for determining the transport block size shown in FIG. 18 . S1803, S1904 in the method for determining the transport block size shown in FIG. 19 .

The processing unit 2001 is configured to perform or support the apparatus for determining the transport block size to perform S1706 and S1707 in the method for determining the transport block size shown in FIG. 17 , and S1804 and S1804 in the method for determining the transport block size shown in FIG. 18 S1805, S1905-S1906 in the method for determining the transport block size shown in FIG. 19 .

It should be noted that, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here.

The apparatus for determining the size of the transport block provided by the embodiment of the present application is used to execute the method of any of the foregoing embodiments, and thus can achieve the same effect as the method of the foregoing embodiment.

The entity device corresponding to the receiving unit may be a receiver, the entity device corresponding to the transmitting unit may be a transmitter, and the entity device corresponding to the processing unit may be a processor.

In the case where each functional module is divided according to each function, FIG. 21 shows a possible example of the composition of the apparatus for determining the size of the transport block involved in the above and the embodiments. FIG. 4 , the apparatus for determining the size of the transport block can execute Steps performed by the network device in any of the method embodiments of the present application. As shown in FIG. 21 , the apparatus for determining the size of the transport block is a network device or a device for determining the size of the transport block that supports the network device to implement the method provided in the embodiment. For example, the apparatus for determining the size of the transport block may be a chip system. The apparatus for determining the size of the transport block may include: a processing unit 2101 , a sending unit 2102 and a receiving unit 2103 .

For uplink signal transmission, the receiving unit 2103 is configured to support the apparatus for determining the size of the transport block to perform the methods described in the embodiments of the present application. For example, the receiving unit 2103 is configured to receive data, for example, to support the apparatus for determining the transport block size to perform S1705 in the method for determining the transport block size shown in FIG. 17 , and S1705 in the method for determining the transport block size shown in FIG. 18 S1803, S1904 in the method for determining the transport block size shown in FIG. 19 .

The processing unit 2101 is configured to execute or support the apparatus for determining the transport block size to perform S1706 and S1707 in the method for determining the transport block size shown in FIG. 17 , and S1804 and S1804 in the method for determining the transport block size shown in FIG. 18 S1805, S1905 and S1906 in the method for determining the transport block size shown in FIG. 19 .

For downlink signal transmission, the processing unit 2101 is configured to support the apparatus for determining the size of the transport block to perform the method described in the embodiments of the present application. For example, the processing unit 2101 is configured to execute or support the apparatus for determining the transport block size to execute S1701 to S1703 in the method for determining the transport block size shown in FIG. S1801, S1901 and S1902 in the method for determining the transport block size shown in FIG. 19 .

The sending unit 2102 is configured to send data, for example, to support the apparatus for determining the size of the transport block to perform S1704 in the method for determining the size of the transport block shown in FIG. 17 , S1802 in the method for determining the size of the transport block shown in FIG. 18 , S1903 in the method of determining the transport block size shown in FIG. 19 .

It should be noted that, all relevant contents of the steps involved in the above method embodiments can be cited in the functional description of the corresponding functional module, which will not be repeated here.

The apparatus for determining the size of the transport block provided by the embodiment of the present application is used to execute the method of any of the foregoing embodiments, and thus can achieve the same effect as the method of the foregoing embodiment.

The entity device corresponding to the receiving unit may be a receiver, the entity device corresponding to the transmitting unit may be a transmitter, and the entity device corresponding to the processing unit may be a processor.

FIG. 22 shows a possible schematic structural diagram of the network device involved in the above embodiment.

The network device includes a transmitter/receiver 2201 , a controller/processor 2202 and a memory 2203 . The transmitter/receiver 2201 is used to support sending and receiving information between the network device and the terminal device in the above-mentioned embodiment. The controller/processor 2202 performs various functions for communicating with end devices. On the uplink, the uplink signal from the terminal device is received via the antenna, mediated by the receiver 2201, and further processed by the controller/processor 2202 to recover the service data and signaling information sent by the terminal device . On the downlink, traffic data and signaling messages are processed by the controller/processor 2202 and mediated by the transmitter 2201 to generate downlink signals, which are transmitted to the terminal device via the antenna. The controller/processor 2202 also performs the processes of Figures 17 and 19 involving network devices and/or other processes for the techniques described herein. The memory 2203 is used to store program codes and data of the network device.

FIG. 23 shows a simplified schematic diagram of a possible design structure of the terminal device involved in the above embodiment. The terminal equipment includes a transmitter 2301 , a receiver 2302 , a controller/processor 2303 , a memory 2304 and a modem processor 2305 .

The transmitter 2301 is configured to transmit an uplink signal (repeatedly transmit data carried on symbols corresponding to the first time unit S times), and the uplink signal is transmitted to the network device described in the above embodiment via an antenna. On the downlink, the antenna receives the downlink signal transmitted by the network device in the above-mentioned embodiment (repeatedly transmits the data carried on the symbol corresponding to the first time unit S times). The receiver 2302 is configured to receive the downlink signal received from the antenna (S times the data carried on the symbol corresponding to the first time unit). In modem processor 2305, encoder 2306 receives and processes traffic data and signaling messages to be sent on the uplink. Modulator 2307 further processes (eg, symbol mapping and modulation) the encoded traffic data and signaling messages and provides output samples. A demodulator 2309 processes (eg, demodulates) the input samples and provides symbol estimates. A decoder 2308 processes (eg, decodes) the symbol estimates and provides decoded data and signaling messages for transmission to the terminal device. The encoder 2306 , modulator 2307 , demodulator 2309 and decoder 2308 may be implemented by a composite modem processor 2305 . These units are processed according to the radio access technology adopted by the radio access network.

The controller/processor 2303 controls and manages the actions of the terminal device, so as to execute the processing performed by the terminal device in the above-mentioned embodiment. For example, it is used to control the terminal equipment to determine the TBS according to the number of REs and the modulation and coding modes included in the M first time units, and to decode the data on the symbols corresponding to the first time unit according to the TBS and/or other processes of the technology described in this application. As an example, the controller/processor 2303 is configured to support the terminal device to perform the processes S1701 to S1703 in FIG. 17 , the process S1801 in FIG. 18 , and the process S1901 in FIG. 19 .

In this embodiment of the present application, the processor may be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, which can implement or The methods, steps and logic block diagrams disclosed in the embodiments of this application are executed. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware processor, or executed by a combination of hardware and software modules in the processor.

In this embodiment of the present application, the memory may be a non-volatile memory, such as a hard disk drive (HDD) or a solid-state drive (SSD), etc., or may be a volatile memory (volatile memory), such as random access Access memory (random-access memory, RAM). Memory is, but is not limited to, any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory in this embodiment of the present application may also be a circuit or any other device capable of implementing a storage function, for storing program instructions and/or data.

From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of the above functional modules is used as an example for illustration. In practical applications, the above functions can be allocated as required. It is completed by different functional modules, that is, the internal structure of the device is divided into different functional modules, so as to complete all or part of the functions described above.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules or units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be Incorporation may either be integrated into another device, or some features may be omitted, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place, or may be distributed to multiple different places . Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The methods provided in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, a network device, a terminal or other programmable device. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be downloaded from a website site, computer, server, or data center Transmission to another website site, computer, server, or data center by wire (eg, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (eg, infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available media that can be accessed by a computer, or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The usable media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, digital video discs (DVDs)), or semiconductor media (eg, SSDs), and the like.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this, and any changes or substitutions within the technical scope disclosed in the present application should be covered within the protection scope of the present application. . Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (41)

1. a method for determining transport block size TBS, characterized in that, comprising: Receive data carried S times on the symbol corresponding to the first time unit, S is an integer, S is greater than or equal to 1, and less than or equal to K, K is an integer greater than or equal to 2, and K indicates that the pre-configured repeated transmission is carried on the the number of times of data on the symbol corresponding to the first time unit; Determine the TBS according to the number of resource element REs and the modulation and coding scheme included in the M first time units, where M is an integer greater than or equal to 1 and less than or equal to K; Decode data on symbols corresponding to the first time unit according to the TBS; M=K, the first transmission opportunity in K is t, and the first transmission opportunity is the first time to send the data carried on the symbol corresponding to the first time unit, where t is greater than or equal to 1 A positive integer less than or equal to K. 2. The method for determining the size of a transport block according to claim 1, wherein S=K-t+1, indicating that the data carried on the symbol corresponding to the first time unit is repeatedly transmitted in the second time unit number of times. 3 . The method for determining the size of a transport block according to claim 1 , wherein S=K represents the number of times of repeated transmission of the data carried on the symbol corresponding to the first time unit in the second time unit. 4 . 4. The method for determining the size of a transport block according to claim 1, wherein M=1, after the TBS is determined according to the number of REs and the modulation and coding modes included in the M first time units, the method comprises: If the symbols corresponding to the P first time units carry the demodulation reference signal DMRS, adjust the TBS according to the first scale factor to obtain the first adjusted TBS, the first scale factor is greater than 1, and P is Integer, P is greater than or equal to 1 and less than K. 5. The method for determining the size of a transport block according to claim 1, wherein M=1, and after the TBS is determined according to the number of REs and the modulation and coding modes included in the M first time units, the method further comprises: If all symbols corresponding to the first time unit are used to carry the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH, adjust the TBS according to the second scale factor to obtain a second adjusted TBS, the second scale The factor is less than 1. 6. The method for determining a transport block size according to any one of claims 1-5, wherein the first time unit is a mini-slot, and the second time unit is a time slot. 7. The method for determining a transport block size according to any one of claims 1-5, wherein the value of K is predefined or dynamically indicated by downlink control information DCI. 8. A method for determining a transport block size TBS, comprising: The TBS is determined according to the number of resource elements REs and the modulation and coding modes included in the M first time units, where M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K represents pre-configured repeated transmission the number of times the data is carried on the symbol corresponding to the first time unit; Repeatedly sending data carried on the symbol corresponding to the first time unit for S times according to the TBS, where S is an integer, S is greater than or equal to 1, and less than or equal to K; M=K, the first transmission opportunity in K is t, and the first transmission opportunity is the first time to send the data carried on the symbol corresponding to the first time unit, where t is greater than or equal to 1 A positive integer less than or equal to K. 9 . The method for determining the size of a transport block according to claim 8 , wherein S=K-t+1, indicating that the data carried on the symbol corresponding to the first time unit is repeatedly transmitted in the second time unit. 10 . number of times. 10 . The method for determining the size of a transport block according to claim 8 , wherein S=K, which represents the number of times that the data carried on the symbol corresponding to the first time unit is repeatedly transmitted in the second time unit. 11 . 11. The method for determining the size of a transport block according to claim 8, wherein M=1, and after the TBS is determined according to the number of REs and the modulation and coding modes included in the M first time units, the method comprises: If the symbols corresponding to the P first time units carry the demodulation reference signal DMRS, adjust the TBS according to the first scale factor to obtain the first adjusted TBS, the first scale factor is greater than 1, and P is Integer, P is greater than or equal to 1 and less than K. 12. The method for determining the size of a transport block according to claim 8, wherein M=1, and after the TBS is determined according to the number of REs and the modulation and coding modes included in the M first time units, the method further comprises: If all symbols corresponding to the first time unit are used to carry the physical uplink shared channel PUSCH or the physical downlink shared channel PDSCH, adjust the TBS according to the second scale factor to obtain a second adjusted TBS, the second scale The factor is less than 1. 13. The method for determining a transport block size according to any one of claims 8-12, wherein the first time unit is a mini-slot, and the second time unit is a time slot. 14. The method for determining a transport block size according to any one of claims 8-12, wherein the value of K is predefined or dynamically indicated by downlink control information DCI. 15. An apparatus for determining a transport block size TBS, comprising: A receiving unit, configured to receive data carried on symbols corresponding to the first time unit for S times, S is an integer, S is greater than or equal to 1, and less than or equal to K, K is an integer greater than or equal to 2, and K represents a pre-configured repetition the number of times of sending the data carried on the symbol corresponding to the first time unit; A processing unit, configured to determine a TBS according to the number of resource elements REs and a modulation and coding scheme included in the M first time units, and decode the symbols corresponding to the first time units received by the receiving unit according to the TBS. data, where M is an integer greater than or equal to 1 and less than or equal to K; M=K, the first transmission opportunity in K is t, and the first transmission opportunity is the first time to send the data carried on the symbol corresponding to the first time unit, where t is greater than or equal to 1 A positive integer less than or equal to K. 16. The apparatus for determining the size of a transport block according to claim 15, wherein S=K-t+1, indicating that the data carried on the symbol corresponding to the first time unit is repeatedly transmitted in the second time unit number of times. 17 . The apparatus for determining the size of a transport block according to claim 15 , wherein S=K, which represents the number of times that the data carried on the symbol corresponding to the first time unit is repeatedly transmitted in the second time unit. 18 . 18. The apparatus for determining the size of a transport block according to claim 15, wherein the processing unit is further configured to: when M=1, if the symbols corresponding to the P first time units carry a demodulation reference For the signal DMRS, adjust the TBS according to a first scaling factor to obtain a first adjusted TBS, the first scaling factor is greater than 1, P is an integer, P is greater than or equal to 1, and less than K. 19 . The apparatus for determining the size of a transport block according to claim 15 , wherein the processing unit is further configured to, when M=1, if all symbols corresponding to the first time unit are used to carry physical uplink sharing Channel PUSCH or physical downlink shared channel PDSCH, adjust the TBS according to a second scale factor to obtain a second adjusted TBS, and the second scale factor is less than 1. 20. The apparatus for determining the size of a transport block according to any one of claims 15-19, wherein the first time unit is a mini-slot, and the second time unit is a time slot. 21. The apparatus for determining the size of a transport block according to any one of claims 15-19, wherein the value of K is predefined or dynamically indicated by downlink control information DCI. 22. An apparatus for determining a transport block size TBS, comprising: A processing unit, configured to determine the TBS according to the number of resource elements REs and the modulation and coding modes included in the M first time units, where M is an integer greater than or equal to 1 and less than or equal to K, K is an integer greater than or equal to 2, and K Indicates the number of times preconfigured to repeatedly transmit the data carried on the symbol corresponding to the first time unit; a sending unit, configured to repeatedly send data carried on the symbol corresponding to the first time unit for S times according to the TBS determined by the processing unit, where S is an integer, S is greater than or equal to 1, and less than or equal to K; M=K, the first transmission opportunity in K is t, and the first transmission opportunity is the first time to send the data carried on the symbol corresponding to the first time unit, where t is greater than or equal to 1 A positive integer less than or equal to K. 23. The apparatus for determining the size of a transport block according to claim 22, wherein S=K-t+1, indicating that the data carried on the symbol corresponding to the first time unit is repeatedly transmitted in the second time unit number of times. 24 . The apparatus for determining the size of a transport block according to claim 22 , wherein S=K represents the number of times of repeated transmission of data carried on the symbol corresponding to the first time unit in the second time unit. 25 . 25. The apparatus for determining the size of a transport block according to claim 22, wherein the processing unit is further configured to: when M=1, if the symbols corresponding to the P first time units carry a demodulation reference For the signal DMRS, adjust the TBS according to a first scaling factor to obtain a first adjusted TBS, the first scaling factor is greater than 1, P is an integer, P is greater than or equal to 1, and less than K. 26. The apparatus for determining the size of a transport block according to claim 22, wherein the processing unit is further configured to, when M=1, if all symbols corresponding to the first time unit are used to carry physical uplink sharing Channel PUSCH or physical downlink shared channel PDSCH, adjust the TBS according to a second scale factor to obtain a second adjusted TBS, and the second scale factor is less than 1. 27. The apparatus for determining the size of a transport block according to any one of claims 22-26, wherein the first time unit is a mini-slot, and the second time unit is a time slot. 28. The apparatus for determining a transport block size according to any one of claims 22-26, wherein the value of K is predefined or dynamically indicated by downlink control information DCI. 29. A method for determining a transport block size TBS, comprising: Receive data carried S times on the symbol corresponding to the first time unit, S is an integer, S is greater than or equal to 1, and less than or equal to K, K is an integer greater than or equal to 2, and K indicates that the pre-configured repeated transmission is carried on the the number of times of data on the symbol corresponding to the first time unit; When the duration of the K first time units is greater than the duration of one second time unit, the TBS is determined according to the number of resource element REs and the modulation and coding scheme corresponding to the reference duration; Decode data on symbols corresponding to the first time unit according to the TBS; Wherein, the reference duration is equal to the duration of the second time unit; or, the reference duration is equal to the duration of R first time units, where R is the largest integer less than K, and the reference duration is less than the duration of the second time unit; The first transmission opportunity in K is t, and the first transmission opportunity is the first transmission opportunity of the data carried on the symbol corresponding to the first time unit, where t is greater than or equal to 1 and less than or equal to positive integer of K. 30. The method of claim 29, wherein the first time unit is a mini-slot, and the second time unit is a time slot. 31. The method for determining the size of a transport block according to claim 29, wherein the value of K is predefined or dynamically indicated by downlink control information DCI. 32. A method for determining transport block size TBS, comprising: When the duration of the K first time units is greater than the duration of one second time unit, the TBS is determined according to the number of resource element REs corresponding to the reference duration and the modulation and coding scheme, where K is an integer greater than or equal to 2, and K represents the pre-configured repeated transmission bearer the number of times of data on the symbol corresponding to the first time unit; Repeatedly sending data carried on the symbol corresponding to the first time unit for S times according to the TBS, where S is an integer, S is greater than or equal to 1, and less than or equal to K; Wherein, the reference duration is equal to the duration of the second time unit; or, the reference duration is equal to the duration of R first time units, where R is the largest integer less than K, and the reference duration is less than the duration of the second time unit; The first transmission opportunity in K is t, and the first transmission opportunity is the first transmission opportunity of the data carried on the symbol corresponding to the first time unit, where t is greater than or equal to 1 and less than or equal to positive integer of K. 33. The method of claim 32, wherein the first time unit is a mini-slot, and the second time unit is a time slot. 34. The method for determining the size of a transport block according to claim 32, wherein the value of K is predefined or dynamically indicated by downlink control information DCI. 35. An apparatus for determining a transport block size TBS, comprising: A receiving unit, configured to receive data carried on symbols corresponding to the first time unit for S times, S is an integer, S is greater than or equal to 1, and less than or equal to K, K is an integer greater than or equal to 2, and K represents a pre-configured repetition the number of times of sending the data carried on the symbol corresponding to the first time unit; A processing unit, configured to determine the TBS according to the number of resource element REs corresponding to the reference duration and the modulation and coding mode when the duration of the K first time units is greater than the duration of one second time unit, and decode the received TBS according to the TBS The data on the symbol corresponding to the first time unit received by the unit, wherein the reference duration is equal to the duration of the second time unit; or, the reference duration is equal to the duration of the R first time units, The R is the largest integer less than K, and the reference duration is less than the duration of the second time unit; The first transmission opportunity in K is t, and the first transmission opportunity is the first transmission opportunity of the data carried on the symbol corresponding to the first time unit, where t is greater than or equal to 1 and less than or equal to positive integer of K. 36. The apparatus for determining the size of a transport block according to claim 35, wherein the first time unit is a mini-slot, and the second time unit is a time slot. 37. The apparatus for determining the size of a transport block according to claim 35, wherein the value of K is predefined or dynamically indicated by downlink control information DCI. 38. An apparatus for determining a transport block size TBS, comprising: The processing unit is used to determine the TBS according to the number of resource element REs corresponding to the reference duration and the modulation and coding mode when the duration of the K first time units is greater than the duration of one second time unit, where K is an integer greater than or equal to 2, and K represents Preconfiguring the number of times of repeatedly sending the data carried on the symbol corresponding to the first time unit; a sending unit, configured to repeatedly send the data carried on the symbol corresponding to the first time unit for S times according to the TBS determined by the processing unit, where S is an integer, S is greater than or equal to 1, and less than or equal to K; Wherein, the reference duration is equal to the duration of the second time unit; or, the reference duration is equal to the duration of R first time units, where R is the largest integer less than K, and the reference duration is less than the duration of the second time unit; The first transmission opportunity in K is t, and the first transmission opportunity is the first transmission opportunity of the data carried on the symbol corresponding to the first time unit, where t is greater than or equal to 1 and less than or equal to positive integer of K. 39. The apparatus for determining the size of a transport block according to claim 38, wherein the first time unit is a mini-slot, and the second time unit is a time slot. 40. The apparatus for determining the size of a transport block according to claim 38, wherein the value of K is predefined or dynamically indicated by downlink control information DCI. 41. A computer-readable storage medium, comprising: computer software instructions; When the computer software instructions run in the transport block size determining device or a chip built in the transport block size determining device, the device causes the device to perform the transport block size determining method of any one of claims 1-14 method, or a method of determining a transport block size as claimed in any of claims 29-34.

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