WO2020221055A1

WO2020221055A1 - Method for receiving data and sending data, and communication apparatus

Info

Publication number: WO2020221055A1
Application number: PCT/CN2020/085760
Authority: WO
Inventors: 吴霁; 马瑞泽大卫•简-玛丽; 张佳胤
Original assignee: 华为技术有限公司
Priority date: 2019-04-30
Filing date: 2020-04-21
Publication date: 2020-11-05
Also published as: CN111867074A; CN111867074B

Abstract

Provided in the present application are a method for receiving data and sending data and a communication apparatus, in order to prevent the waste of resources and reduce signaling overhead. The described method may comprise: a terminal device receiving downlink control information (DCI), the DCI being used to indicate a time domain resource indication, and the time domain resource indication comprising information on a relative position between a time domain resource used for transmitting data and a time domain resource used for transmitting DCI; and the terminal device determining a starting position of the time domain resource used for transmitting data, and receiving data on the basis of the starting position.

Description

Method and communication device for receiving and sending data

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on April 30, 2019, the application number is 201910364413.0, and the application name is "Methods for Receiving and Sending Data, Communication Devices", the entire content of which is incorporated by reference In this application.

Technical field

This application relates to the field of communication, and more specifically, to a method and communication device for receiving and sending data.

Background technique

The rapid development of wireless communication technology has led to an increasing shortage of spectrum resources, which has promoted the exploration of unlicensed frequency bands. The 3rd Generation Partnership Project (3GPP) introduced license assisted access (license assisted access) in version 13 (release-13, R-13) and version 14 (release-14, R-14), respectively. LAA) and enhanced LAA (eLAA) technology, that is, non-standalone deployment of LTE/LTE-A systems on unlicensed spectrum, with the assistance of licensed spectrum to maximize the use of unlicensed Spectrum resources.

Communication systems deployed on unlicensed spectrum usually use or share wireless resources in a competitive manner. Generally, the sending end device first monitors whether the unlicensed channel (or unlicensed spectrum) is free before sending a signal. For example, the sender device confirms whether the channel is free through a listen before talk (LBT) mechanism.

Taking the network device as an example, if the LBT initiated by the network device is successful, the network device obtains the channel use right. The network device occupies the channel during the channel occupancy time (COT). For example, the network device can send data to the terminal device, and the network device can indicate the data to the terminal device through downlink control information (DCI) The absolute position information of the time domain resource.

However, considering that the result of LBT is real-time, that is, the LBT initiated by the network device may succeed in different locations, based on the above-mentioned indication method, the network device needs to update the DCI indication information in real time to indicate the time domain resource of the terminal device data. The method is very wasteful of resources.

Summary of the invention

The present application provides a method and communication device for receiving and sending data, in order to avoid resource waste, save signaling overhead, and reduce transmission delay.

In the first aspect, a communication method is provided. The method may be executed by a terminal device, or may also be executed by a chip or a circuit configured in the terminal device, which is not limited in this application.

The method may include: a terminal device receives downlink control information DCI, where the DCI is used to indicate a time domain resource indication, and the time domain resource indication includes a time domain resource for transmitting data and a time domain resource for transmitting the DCI Information about the relative position between the two; based on the time domain resource indication, the terminal device receives the data.

Based on the above technical solution, the terminal device receives the downlink control information (DCI), which can be used to indicate the start and length indicator (start and length indicator, SLIV) (or, it can also be called the time domain resource indicator). ). The SLIV includes information about the relative position between the time domain resources used to transmit data and the time domain resources used to transmit DCI. Therefore, no matter where the network device is located, LBT succeeds, or in other words, the time domain resources used to transmit data When the starting position of is in different time domain positions, the time domain resource indication information in DCI does not need to be updated, because SLIV indicates the time domain resource used to transmit data and the time domain resource used to transmit DCI Therefore, it is possible to avoid waste of resources and reduce requirements on network equipment, and it can also ensure that the terminal device correctly obtains the resource location of the transmitted data, and then correctly receives the data, reduces the transmission delay, and ensures the data transmission performance.

With reference to the first aspect, in some implementations of the first aspect, the time domain resource indicator is used to indicate S and L, and the S represents a time domain resource used to transmit the data and a time domain resource used to transmit the DCI The number of symbols between the start positions of the time domain resources, the L represents the length of the time domain resources used to transmit the data, and S and L are integers greater than or equal to 0.

Based on the above technical solution, the terminal device can determine the start position of the time domain resource for transmitting data based on the start position of the time domain resource of the received DCI, so as to know when to start receiving data. In addition, the value of S will not change continuously with the change of the starting position of the time domain resource used to transmit data, which can save the network equipment from continuously notifying the terminal device of the absolute position of the time domain resource used to transmit data. Signaling overhead to avoid wasting resources.

With reference to the first aspect, in some implementations of the first aspect, the value of S can be any one of the following: T, T+1, T+2; where T represents the time used to transmit the DCI The number of symbols occupied by the domain resource, T is an integer greater than or equal to 1.

With reference to the first aspect, in some implementations of the first aspect, the time domain resources occupied by the multicast common physical downlink control channel GC-PDCCH and/or the time domain occupied by the terminal equipment dedicated physical downlink control channel PDCCH When the resource does not include a complete symbol, the value of S is 0.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device acquiring first indication information, where the first indication information is used to indicate the frequency domain used to transmit the data Resource information.

Based on the above technical solution, when the time domain resources occupied by the GC-PDCCH and/or the time domain resources occupied by the terminal equipment dedicated PDCCH do not include complete symbols, that is, the time domain resources occupied by the GC-PDCCH and/or In the case that the time domain resources occupied by the dedicated PDCCH of the terminal equipment and the time domain resources used for data transmission include the same symbols, the terminal equipment may determine the frequency domain resources based on the obtained indication information.

Optionally, the indication information may be an implicit indication or a display indication; or, the indication information may be indicated by the network device to the terminal device, or may be pre-defined by the protocol.

With reference to the first aspect, in some implementations of the first aspect, the first indication information is used to indicate any of the following: frequency domain resources used to transmit the data and frequency domain resources occupied by GC-PDCCH Do not overlap; or, the frequency domain resources used to transmit the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH; or, the frequency domain resources used to transmit the data and the frequency domain resources occupied by the GC-PDCCH The frequency domain resources and the frequency domain resources occupied by the terminal equipment dedicated PDCCH do not overlap; or, the frequency domain resources used to transmit the data are resources other than the frequency domain resources occupied by the GC-PDCCH, and The first indication information includes information about the frequency domain resources occupied by the GC-PDCCH; or, the frequency domain resources used to transmit the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH, and The terminal equipment dedicated PDCCH includes indication information for indicating that the GC-PDCCH is not transmitted.

Optionally, data coexists with GC-PDCCH and/or PDCCH on different frequency domain resources of the same symbol.

Based on the above technical solution, the terminal device can perform data frequency domain resource analysis on symbols where data coexists with GC-PDCCH and/or PDCCH according to different situations, such as the multiple situations listed above, that is, rate matching (rate matching). -matching), so that the frequency domain resources used for data transmission can be determined.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: the terminal device receives second indication information, where the second indication information is used to indicate that the S is used to transmit the The number of symbols between the time domain resource of the data and the start position of the time domain resource used to transmit the DCI.

Optionally, the indication information may be an implicit indication or a display indication.

Based on the above technical solution, the terminal device can determine the number of symbols between the time domain resource used to transmit data and the start position of the time domain resource used to transmit DCI according to the instructions of the network device, and further determine when Start receiving data.

With reference to the first aspect, in some implementation manners of the first aspect, the method further includes: the terminal device determines the location of the time-frequency resource for transmitting the data according to one or more of the following: The time-frequency resource of the synchronization signal block, the time-frequency resource used to transmit the channel state information reference signal CSI-RS, the time-frequency resource used to transmit paging, or the demodulation reference signal DMRS used to demodulate the data Time-frequency resources.

Based on the above technical solution, when determining the location of the time-frequency resource used for data transmission, the terminal device may consider one or more of the following: the time-frequency resource used to transmit the synchronization signal block, and the channel state information reference signal used to transmit The time-frequency resources of CSI-RS, the time-frequency resources used to transmit paging, or the time-frequency resources of demodulation reference signal DMRS used to demodulate data, thereby avoiding the time-frequency resources and other signals used to transmit data The overlap of time and frequency resources affects data transmission performance.

In the second aspect, a communication method is provided. The method may be executed by a network device, or may also be executed by a chip or circuit configured in the network device, which is not limited in this application.

The method may include: a network device determines a time domain resource indication; the network device sends the DCI to a terminal device, the DCI includes information of the time domain resource indication, and the time domain resource indication includes information for transmitting data Information about the relative position between the time domain resource and the time domain resource used to transmit the DCI.

Based on the above technical solution, when the network device indicates the time domain resource indication to the terminal device, it can indicate the relative position information between the time domain resource used to transmit data and the time domain resource used to transmit DCI. Therefore, no matter where the network device is Where LBT is successful, or when the starting position of the time domain resource used to transmit data appears in a different time domain location, the time domain resource indication information in the DCI does not need to be updated, which can avoid waste of resources and reduce The requirements for network equipment can also ensure that the terminal equipment correctly obtains the resource location of the transmitted data, and then correctly receives the data to ensure the data transmission performance.

With reference to the second aspect, in some implementations of the second aspect, the time domain resource indicator is used to indicate S and L, and the S represents a time domain resource used to transmit the data and a time domain resource used to transmit the DCI The number of symbols between the start positions of the time domain resources, the L represents the length of the time domain resources used to transmit the data, and S and L are integers greater than or equal to 0.

With reference to the second aspect, in some implementations of the second aspect, the value of S is any one of the following: T, T+1, T+2; where T represents the time for transmitting the DCI The number of symbols occupied by the domain resource, T is an integer greater than or equal to 1.

With reference to the second aspect, in some implementations of the second aspect, the time domain resources occupied by the multicast common physical downlink control channel GC-PDCCH and/or the time domain occupied by the terminal equipment dedicated physical downlink control channel PDCCH When the resource does not include a complete symbol, the value of S is 0.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device sends first indication information to the terminal device, where the first indication information is used to indicate the The frequency domain resource information of the data.

With reference to the second aspect, in some implementations of the second aspect, the first indication information is used to indicate any of the following: frequency domain resources used to transmit the data and frequency domain resources occupied by GC-PDCCH Do not overlap; or, the frequency domain resources used to transmit the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH; or, the frequency domain resources used to transmit the data and the frequency domain resources occupied by the GC-PDCCH The frequency domain resources and the frequency domain resources occupied by the terminal equipment dedicated PDCCH do not overlap; or, the frequency domain resources used to transmit the data are resources other than the frequency domain resources occupied by the GC-PDCCH, and The first indication information includes information about the frequency domain resources occupied by the GC-PDCCH; or, the frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH, and the The terminal equipment dedicated PDCCH includes indication information for indicating that the GC-PDCCH is not transmitted.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: the network device sends second indication information to the terminal device, where the second indication information is used to indicate that the S means The number of symbols between the time domain resource used to transmit the data and the start position of the time domain resource used to transmit the DCI.

In a third aspect, a communication device is provided, and the communication device is configured to execute the method provided in the foregoing first aspect. Specifically, the communication device may include a module for executing the method provided in the first aspect.

In a fourth aspect, a communication device is provided, and the communication device is configured to execute the method provided in the second aspect. Specifically, the communication device may include a module for executing the method provided in the second aspect.

In a fifth aspect, a communication device is provided. The communication device includes a memory and a processor, the memory is configured to store instructions, and the processor is configured to execute instructions stored in the memory, so that the communication device executes the first aspect Provided method.

In a sixth aspect, a communication device is provided. The communication device includes a memory and a processor, the memory is configured to store instructions, and the processor is configured to execute the instructions stored in the memory, so that the communication device performs the second aspect. Provided method.

In a seventh aspect, a chip is provided. The chip includes a processing module and a communication interface, the processing module is configured to control the communication interface to communicate with the outside, and the processing module is also configured to implement the method provided in the first aspect.

In an eighth aspect, a chip is provided. The chip includes a processing module and a communication interface, the processing module is configured to control the communication interface to communicate with the outside, and the processing module is also configured to implement the method provided in the second aspect.

In a ninth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a communication device, the communication device realizes the first aspect and any possible implementation of the first aspect The method in the way.

In a tenth aspect, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a communication device, the communication device realizes the second aspect and any possible realization of the second aspect The method in the way.

In an eleventh aspect, a computer program product containing instructions is provided, which when executed by a computer causes a communication device to implement the method provided in the first aspect.

In a twelfth aspect, a computer program product containing instructions is provided, which when executed by a computer causes a communication device to implement the method provided in the second aspect.

In a thirteenth aspect, a communication system is provided, including the aforementioned network equipment and terminal equipment.

Based on the embodiment of the present application, the SLIV indicated by the network device to the terminal device includes information about the relative position between the time domain resource used to transmit data and the time domain resource used to transmit DCI. Therefore, no matter where the network device is located, LBT In other words, when the start position of the time domain resource used to transmit data appears in a different time domain position, the time domain resource indication information in the DCI does not need to be updated, which can avoid the waste of resources and reduce the need for network equipment. It can also ensure that the terminal device correctly obtains the resource location of the transmitted data, and then receives the data correctly to ensure the data transmission performance.

Description of the drawings

Fig. 1 shows a schematic diagram of a communication system applicable to an embodiment of the present application;

Figure 2 shows another schematic diagram of a communication system suitable for an embodiment of the present application;

FIG. 3 shows a schematic diagram of an LBT interception mechanism applicable to an embodiment of the present application;

FIG. 4 shows a schematic diagram of another LBT interception mechanism applicable to an embodiment of the present application;

Figures 5 and 6 show schematic diagrams of two possible time slot frame structures;

Figure 7 shows a schematic diagram of channel occupation;

Figure 8 shows a schematic diagram of a mini-slot;

Fig. 9 is a schematic diagram of a communication method provided according to an embodiment of the present application;

(1) to (3) in FIG. 10 show schematic diagrams of a complete symbol of CORESET applicable to the embodiments of the present application;

FIG. 11 shows a schematic diagram of CORESET and PDSCH being transmitted on the same symbol, which is applicable to an embodiment of the present application;

(1) and (2) in FIG. 12 show a schematic diagram of transmitting RMSI CORESET and RMSI PDSCH applicable to the embodiments of the present application;

FIG. 13 shows another schematic diagram of sending RMSI CORESET and RMSI PDSCH applicable to the embodiments of the present application;

(1) and (2) in FIG. 14 show schematic diagrams of PDSCH DMRS applicable to the embodiments of the present application;

FIG. 15 is a schematic block diagram of a communication device provided by an embodiment of the present application;

FIG. 16 is another schematic block diagram of a communication device provided by an embodiment of the present application;

FIG. 17 is a schematic block diagram of a terminal device provided by an embodiment of the present application;

FIG. 18 is a schematic block diagram of a network device provided by an embodiment of the present application.

Detailed ways

The technical solution in this application will be described below in conjunction with the drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, for example: the future 5th generation (5G) system or new radio (NR), global system for mobile communications, GSM ) System, code division multiple access (CDMA) system, wideband code division multiple access (WCDMA) system, general packet radio service (GPRS), long-term evolution (long-term evolution) term evolution, LTE) system, LTE frequency division duplex (FDD) system, LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), global interconnected microwave access Into (worldwide interoperability for microwave access, WiMAX) communication systems, etc. The technical solutions of the embodiments of this application can also be applied to device-to-device (D2D) communication, machine-to-machine (M2M) communication, machine type communication (MTC), and car networking systems Communication. Among them, the communication methods in the Internet of Vehicles system are collectively referred to as V2X (X stands for anything). For example, the V2X communication includes: vehicle-to-vehicle (V2V) communication, vehicle to roadside infrastructure (V2I) ) Communication, vehicle-to-pedestrian (V2P) or vehicle-to-network (V2N) communication, etc.

In order to facilitate the understanding of the embodiments of the present application, a communication system applicable to the embodiments of the present application is first described in detail with reference to FIGS.

FIG. 1 is a schematic diagram of a wireless communication system 100 applicable to an embodiment of the present application. As shown in FIG. 1, the wireless communication system 100 may include at least one network device, such as the network device 111 shown in FIG. 1, and the wireless communication system 100 may also include at least one terminal device, such as the terminal device 121 shown in FIG. To terminal equipment 123. Both network equipment and terminal equipment can be configured with multiple antennas, and the network equipment and terminal equipment can communicate using multiple antenna technology.

Among them, when a network device communicates with a terminal device, the network device may manage one or more cells, and there may be an integer number of terminal devices in a cell. Optionally, the network device 111 and the terminal device 121 to the terminal device 123 form a single-cell communication system. Without loss of generality, the cell is denoted as cell #1. The network device 111 may be a network device in the cell #1, or in other words, the network device 111 may serve a terminal device (for example, the terminal device 121) in the cell #1.

It should be noted that a cell can be understood as an area covered by a wireless signal of a network device.

FIG. 2 is another schematic diagram of a wireless communication system 200 applicable to an embodiment of the present application. As shown in Figure 2, the technical solutions of the embodiments of the present application can also be applied to D2D communication. The wireless communication system 200 includes a plurality of terminal devices, such as the terminal device 124 to the terminal device 126 in FIG. 2. The terminal device 124 to the terminal device 126 can directly communicate with each other. For example, the terminal device 124 and the terminal device 125 may send data to the terminal device 126 separately or at the same time.

It should be understood that FIGS. 1 and 2 are only simplified schematic diagrams for ease of understanding. The communication system 100 or the communication system 200 may further include other network devices or other terminal devices, which are not shown in the figure.

It should also be understood that the network device in the wireless communication system may be any device with a wireless transceiver function. The equipment includes, but is not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (Node B, NB), Base Station Controller (BSC) , Base transceiver station (Base Transceiver Station, BTS), home base station (for example, Home evolved NodeB, or Home Node B, HNB), baseband unit (BaseBand Unit, BBU), wireless fidelity (Wireless Fidelity, WIFI) system Access point (Access Point, AP), wireless relay node, wireless backhaul node, transmission point (transmission point, TP) or transmission and reception point (transmission and reception point, TRP), etc., can also be 5G, such as NR , The gNB in the system, or the transmission point (TRP or TP), one or a group of antenna panels (including multiple antenna panels) of the base station in the 5G system, or the network node that constitutes the gNB or transmission point, Such as baseband unit (BBU), or distributed unit (DU), etc.

In some deployments, the gNB may include a centralized unit (CU) and a DU. The gNB may also include an active antenna unit (AAU for short). CU implements part of the functions of gNB, and DU implements part of the functions of gNB. For example, the CU is responsible for processing non-real-time protocols and services, and implements radio resource control (radio resource control, RRC), packet data convergence protocol (packet data convergence protocol, PDCP) layer functions. The DU is responsible for processing physical layer protocols and real-time services, and realizes the functions of the radio link control (RLC) layer, media access control (MAC) layer, and physical (PHY) layer. AAU realizes some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by DU , Or, sent by DU+AAU. It can be understood that the network device may be a device that includes one or more of a CU node, a DU node, and an AAU node. In addition, the CU can be divided into network equipment in an access network (radio access network, RAN), or the CU can be divided into network equipment in a core network (core network, CN), which is not limited in this application.

It should also be understood that the terminal equipment in the wireless communication system may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, User terminal, terminal, wireless communication device, user agent or user device. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (VR) terminal device, and an augmented reality (AR) terminal Equipment, wireless terminals in industrial control, wireless terminals in unmanned driving (self-driving), wireless terminals in remote medical, wireless terminals in smart grid, transportation safety ( Wireless terminals in transportation safety, wireless terminals in smart cities, and wireless terminals in smart homes. The embodiment of this application does not limit the application scenario.

In order to facilitate the understanding of the embodiments of the present application, the following first briefly introduces several terms involved in the present application.

1. Licensed spectrum and unlicensed spectrum

The frequency spectrum used by the wireless communication system can be divided into two categories, licensed spectrum and unlicensed spectrum. Generally, the carrier on the licensed spectrum is called the licensed carrier, and the carrier on the unlicensed spectrum is called the unlicensed carrier. With the development of wireless communication technology, the amount of information transmitted in the wireless communication network is increasing. To seize the unlicensed spectrum to transmit information can increase the data throughput in the wireless communication network and better meet the needs of users. In the long-term evolution of the unlicensed spectrum (licensed-assisted access using long term evolution, LAA-LTE) system, the LAA-LTE nodes use the channel resources through the listen before talk (LBT) principle. Among them, LBT is A carrier sense multiple access (CSMA) technology. In the LAA system, the LBT mode is used to compete for the access channel, but the start time point of channel occupation in this mode is random, so the start time point of the signal appearance of the LAA-LTE carrier is also random.

In the current LAA system, usually LBT is based on energy detection (energy detection, ED) to support the coexistence of different nodes and technologies. When the measured interference level exceeds a certain level, the node will simply backoff. The preamble detection-based mechanism in the WiFi system has more advantages. The transmission opportunity (TXOP) length is carried in the payload (payload) of the preamble, and the backoff depends on the preamble detection and the demodulation/decoding of the payload.

Generally, after the transmitting end device competes for a channel, it can send a channel occupation signal to other surrounding devices. The channel occupation signal indicates to other devices the length of time that the transmitting end device needs to occupy on the competing channel, thereby avoiding collisions of other devices. Improve communication efficiency. Transmission or reception can be performed within this time period.

The sending end device may be a network device, for example, the network device 111 in the communication system 100. Alternatively, the sending end device may also be a terminal device, for example, the terminal device 121, or the terminal device 122, or the terminal device 123 in the communication system 100. Specifically, if the LBT initiated by the network device is successful, it is determined that it can communicate with the terminal device. If data is sent during the communication, the network device is the sending device; if it is receiving data during the communication, the network device is Receiving device. If the LBT initiated by the terminal device is successful, it is determined that it can communicate with the network device. If it is sending data during the communication, the terminal device is the sending device; if it is receiving data during the communication, the network device is the receiving device.

For a clear understanding, the following describes the general process after the sending end device obtains the channel use right.

After the LBT is successful, the sending end device sends a channel occupation signal, which is used to indicate to other devices the length of time that the sending end device will use the channel on the channel that it is competing for.

If the LBT initiated by the sender device is successful, the sender device obtains the right to use the channel. The sender device occupies the channel within the channel occupancy time (COT). Wherein, the COT may be configured by the network device, or specified by the standard, or pre-stored, etc., which is not limited in the embodiment of the present application. In other words, the sender device can transmit in the COT without being disturbed by other devices. The COT can be less than or equal to the maximum channel occupancy time (maximum channel occupancy time, MCOT), or it can be TXOP.

In the following, "COT" is used as an example of channel occupation time for description.

Generally, when the sending end device is a network device, the transmission in the corresponding COT is downlink transmission; when the sending end device is a terminal device, the transmission in the corresponding COT is uplink transmission. Optionally, the sender device may share the obtained channel usage rights in the COT with other devices. For example, when the sending end device is a network device, the network device can share the channel use right to the terminal device for use, that is, allow the terminal device to transmit in the COT. In other words, there will be a switch between uplink transmission and downlink transmission within a certain COT. This switching can be one or multiple times.

2. Send LBT after listening

In order to ensure coexistence with other devices operating in unlicensed frequency bands, 5G systems or next-generation systems adopt LBT channel competition access mechanisms. Figures 3 and 4 show two types of LBT listening mechanisms.

One type of LBT listening mechanism is shown in Figure 3, where the LBT device can perform independent backoff on multiple carriers, such as component carriers (CC). As shown in Figure 3, for example, when the competing node Wi-Fi is occupied, that is, when there is a Wi-Fi protocol data unit on carrier 2, the LBT device backs off independently on carrier 1, carrier 3, and carrier 4 (ie self-backoff) , Perform busy extended idle channel assessment on carrier 2 (as shown in Figure 3, busy extended idle channel assessment slot). Busy extended idle channel assessment can be understood as estimating the length of the channel occupied by the LBT device on carrier 2. As shown in Figure 3, the LBT device backs off independently on carrier 2 and carrier 3, and performs busy extended idle channel assessment on carrier 4. In Figure 3, the busy initial idle channel assessment can be understood as the idle channel assessment performed before the WiFi node is occupied. The idle initial channel assessment can be understood as the idle channel assessment performed before the base station is occupied. The busy extended idle channel assessment can be understood as the channel assessment performed during the occupation of the WiFi node. The idle extension idle channel assessment can be understood as the channel assessment performed before data transmission. In the LBT listening mechanism shown in Figure 3, when backoff is completed on a certain carrier, transmission is delayed to wait for other component carriers that are still backoff. Carrier 1 to carrier 4 in Fig. 3, specifically, as shown in Fig. 3, when LBT self-backoffs on carrier 1 and carrier 3, no data is transmitted on carrier 4. After all the carriers performing LBT have completed backoff, the device needs to do an additional one-shot clear channel assessment (one-shot CCA) to ensure that all carriers are free. As shown in Figure 3, the initial idle channel assessment duration is idle. If all the carriers are idle, the base station transmits on the idle carriers at the same time. For example, a duration can be 25 microseconds (us).

There is also a type of LBT listening mechanism as shown in Figure 4, where the LBT device only performs back-off on a selected component carrier. In Figure 4, back-off is performed on the selected carrier. At the end of the backoff, before starting data transmission, perform initial idle channel assessment on carrier 1, carrier 2, and carrier 3 (as shown in the busy initial idle channel assessment time slot in Figure 4). That is, when the backoff ends, one-shot CCA is performed on other component carriers. If the component carrier is idle, data transmission is performed; if the component carrier is not idle, data transmission cannot be performed on the component carrier this time. In Figure 4, the busy initial idle channel assessment can be understood as the idle channel assessment performed before the WiFi node is occupied. The idle initial channel assessment can be understood as the idle channel assessment performed before the base station is occupied. The busy extended idle channel assessment can be understood as the channel assessment performed during the occupied period of the WiFi node. The idle extension idle channel assessment can be understood as the channel assessment performed before data transmission.

As shown in FIG. 3 or FIG. 4, the device performing LBT may be a communication device in a 5G system or a next-generation system, such as LAA LTE, WiFi, NR-U, or other communication devices operating in an unlicensed frequency band. The interference received by the device performing LBT in Figure 3 or Figure 4 comes from the WiFi system. In actual scenarios, the interference received by the device performing LBT can also come from 5G systems or next-generation systems, such as LAA LTE, NR-U or Other communication systems working in unlicensed frequency bands are not limited in this application.

It should be noted that the LBT interception mechanism adopted in the embodiment of the present application is not limited to the interception mechanism shown in FIG. 3 or FIG. 4 above.

3. Channel occupation signal

After the sending end device competes for the channel, it can send channel occupation signals to other surrounding devices. The channel occupancy signal can be used to indicate to other devices the transmission time that the transmitting end device needs to occupy on the competing channel, thereby avoiding collisions of other devices. In addition, the channel occupancy signal can also instruct other devices to feed back channel occupancy information.

It should be noted that in the embodiments of the present application, the channel occupation signal may also be channel occupation indication information or channel indication information, etc., and its specific name does not limit the scope of protection to be protected by this application.

4. Symbol

The smallest unit of time domain resources. The embodiment of the present application does not limit the time length of a symbol. For different subcarrier intervals, the length of a symbol can be different. The symbol may include an uplink symbol and a downlink symbol, as an example and not a limitation; the downlink symbol may be called an OFDM symbol, for example. In the embodiment of the present application, the symbol may be another example of the resource unit.

5. Time slot

The time slot is a period of time resource. For example, in NR, a time slot may be the smallest scheduling unit of time. A slot format contains 14 OFDM symbols, and the CP of each OFDM symbol is a normal CP (normal CP); a slot format contains 12 OFDM symbols, and the CP of each OFDM symbol is an extended CP ( extended CP); A slot format contains 7 OFDM symbols, and the CP of each OFDM symbol is the normal CP. The OFDM symbols in a time slot can be all used for uplink transmission; all can be used for downlink transmission; or some of them can be used for downlink transmission, some for uplink transmission, and some are reserved for no transmission. It should be understood that the above examples are merely illustrative and should not constitute any limitation to the application. For the sake of system forward compatibility, the slot format is not limited to the above example.

Two time slot frame structures are introduced in conjunction with Figure 5 and Figure 6.

As shown in FIG. 5, the frame structure shown in FIG. 5 is a frame structure under the LTE system. In a scheduling slot, the first 1 OFDM symbol, or the first 2 OFDM symbols, or the first 3 OFDM symbols carry downlink control information (DCI), and the following symbols carry data. In other words, in LTE, DCI is located on one or more of the first 3 symbols of each frame.

In order to improve the flexibility of system scheduling, the concept of mini-slots, mini-slots, is introduced in NR. Its length can be: 2 OFDM symbols, 4 OFDM symbols, or 7 OFDM symbols. The mini-slot with 4 symbols and the mini-slot with 2 symbols are shown in Figure 6. The first symbol in each mini-slot has a mini-slot control resource set (control resource set, CORESET), which is used to carry the mini-slot scheduling information.

Control resource set: A resource set used to transmit downlink control information, which may also be referred to as a control resource region or a physical downlink control channel resource set.

Each control resource set may be a set of resource element groups (REG). REG is the basic unit for downlink control signaling to allocate physical resources, and is used to define the mapping of downlink control signaling to RE. For example, in the LTE protocol, it is stipulated that one REG is composed of 4 continuous resource elements (resource elements, RE) of non-reference signal (RS) in the frequency domain. It should be understood that REG is only a unit for resource allocation and should not constitute any limitation to this application. This application does not exclude the definition of a new resource allocation unit in future agreements to achieve the same or similar functions.

For network devices, the control resource set can be understood as a set of resources that may be used to send a physical downlink control channel (PDCCH); for terminal devices, the search space of each terminal device’s PDCCH corresponds to All resources belong to the control resource set. In other words, the network device can determine the resource used to send the PDCCH from the control resource set, and the terminal device can determine the PDCCH search space according to the control resource set.

Wherein, the control resource set may include time-frequency resources, for example, it may be a section of bandwidth in the frequency domain, or one or more subbands, etc.; it may be one or more symbols in the time domain. A control resource set may be continuous or discontinuous resource units in the time-frequency domain, for example, a continuous resource block (resource block, RB) or a discontinuous RB.

It should be understood that the specific content of the frequency domain resources, time domain resources, and time-frequency domain resources listed above are only exemplary descriptions, and should not constitute any limitation to this application. For example, an RB is an example of a resource unit, and the size of the RB may be a resource defined in the NR protocol, or a resource defined in a future protocol, or other names may be used instead. For another example, the control resource set in the time domain may also be one or more time slots, radio frames, subframes, mini-slots or sub-slots, or transmission time intervals (TTI). The application embodiment does not specifically limit this.

In the embodiment of the present application, the control resource set is a mini-slot in the time domain as an example for description.

It should be understood that the control resource set listed above is only exemplary, and the embodiment of the present application does not limit this. For example, the control resource set can be configured through the ControlResourceSet information element in the high-level parameters. The high-level parameters may include, for example, the identification (ID) of the control resource set, frequency domain resources, and the number of symbols included in the duration (duration). This application does not limit the specific parameters used to configure the control resource set.

6. Time-frequency resources

In the embodiments of the present application, data or information may be carried by time-frequency resources, where the time-frequency resources may include resources in the time domain and resources in the frequency domain. Wherein, in the time domain, the time-frequency resource may include one or more time domain units (or, it may also be referred to as a time unit), and in the frequency domain, the time-frequency resource may include one or more frequency domain units.

Among them, a time domain unit may be a symbol, or a mini-slot, or a time slot (slot), or a subframe (subframe). Among them, the duration of a subframe in the time domain may be 1 millisecond (ms). One mini-slot may include at least one symbol (for example, 2 symbols or 4 symbols or 7 symbols or 14 symbols, or any number of symbols less than or equal to 14 symbols). The above-mentioned time-domain unit sizes are only for the convenience of understanding the solutions of the application, and should not be understood as limiting the present invention. It is understandable that the above-mentioned time-domain unit sizes may be other values, which are not limited in this application.

A frequency domain unit may be a resource block (resource block, RB), or a resource block group (resource block group, RBG), or a predefined subband (subband).

In the embodiments of the present application, "data" or "information" can be understood as bits generated after information blocks are coded, or "data" or "information" can also be understood as modulation symbols generated after information blocks are coded and modulated.

From the above description, it can be seen that the transmitter equipment (such as network equipment) working in the unlicensed frequency band can start LBT at any time. Due to the occurrence of interference generated by other systems and the uncertainty of the duration, LBT may end at any time. As shown in Figure 7, the sender device grabs the channel in the middle of slot 0. For LTE LAA, it supports transmission opportunities (such as TXOP) starting from the first symbol of the slot or the seventh symbol . The receiving end device (such as the terminal device) will detect the DCI at these two positions of each slot outside the transmission opportunity to determine whether the TXOP exists.

When the receiving device detects the TXOP, the DCI sent by the transmitting device to the receiving device will only be located in the first 1 OFDM symbol, 2 OFDM symbols, or 3 OFDM symbols of each slot, that is, when If the receiving device does not detect DCI in the first 3 OFDM symbols in a slot, the receiving device will think that the transmitting device has not sent data in this slot. In order to save energy consumption, the receiving device is in other OFDM symbols in this slot. The symbols (symbol 3-symbol 13) will not try to detect DCI again. The receiving end device repeats the above process in each slot.

Then, suppose that LBT succeeds in symbol 8 of slot 0, that is, the sending end device grabs the channel at symbol 8 of slot 0. Since the receiving end device will not detect DCI at this position, even if the sending end device is in symbol 8-symbol 13 Send data, the receiving end device will not receive the data. In this case, symbol 8-symbol 13 of slot 0 can only be vacant or send useless signals, that is, downlink control information and data can only be sent in the next complete slot (for example, slot 1) and later slots.

For this reason, mini-slot is proposed. As shown in Figure 8, the sender device will prepare a full slot (full slot) and a mini-slot with a length of 2 symbols, a mini-slot with a length of 4 symbols, and a mini-slot with a length of 7 symbols before the LBT. , And adjust the actual transmission mode according to the final LBT.

As shown in Figure 8, when the LBT of the first symbol in the slot (ie symbol 0) is successful, the sending device can send 2 symbols mini-slot in symbol 1, symbol 3 sends 4 symbol mini-slot, and symbol 7 sends 7 symbol mini-slot. If the LBT succeeds before different symbols in the slot, the downlink data will be sent in different ways. Take the 2-slot mini-slot as an example. When the LBT succeeds at different times, the sending end device may appear in 4 positions in the slot, as shown in Figure 8: Symbol 1-2, Symbol 5-6, Symbol 8 -9, symbols 12-13.

It should be understood that the several situations shown in FIG. 8 are only exemplary descriptions and do not limit the embodiments of the present application.

Table 1 shows the DCI resource indication table. It can be seen from Table 1 that there are 4 bits in the DCI to indicate the time domain position of the downlink resource. It is indicated by 4 bits to obtain a row configuration (row x) in the PDSCH allocation list (pdsch-Allocationlist), where x is an integer greater than or equal to 0, row x can correspond to the following information: k0, mapping type, and The startsymbolandlength configuration value. In other words, the terminal device can determine the k0, mapping type, and startsymbolandlength configuration value corresponding to the row x indicated by the received DCI. In other words, the terminal device can learn the k0, PDSCH mapping type, and startsymbolandlength configuration value. This information can then determine the time domain resources used to transmit the PDSCH.

Table 1

It should be understood that the foregoing Table 1 only provides a possible DCI resource indication table as an example, and the embodiment of the present application is not limited thereto.

Among them, k0 can represent the slot offset value between the DCI and the scheduled PDSCH. For mini-slot, k0 is fixed to 0, that is, the PDSCH is always connected with the corresponding DCI. For mini-slot, the mapping type is type B. For a mini-slot with 2/4/7 symbols, SLIV=14*(L-1)+S, where S is the absolute number of the PDSCH starting symbol, and L is the number of symbols that the mini-slot lasts, which is 2/4 /7 symbol.

For different PDSCH mapping types and different cyclic prefix (CP), the corresponding S and L combinations are different. As shown in Table 2 and Table 3.

Regarding the mapping type, the mapping mode of PDSCH or PUSCH in the time domain may include a first mapping mode and a second mapping mode, where the first mapping mode may be mapping type A (mapping type A) in the NR protocol, and the second mapping The method can be the mapping type B (mapping type A) in the NR protocol. Under normal circumstances, the mapping mode of PDSCH or PUSCH can be indicated by higher layer signaling, for example, radio resource control (RRC) signaling.

Regarding CP, it includes normal CP (normal CP) and extended CP (extended CP). A slot format contains 14 OFDM symbols, and the CP of each OFDM symbol is a normal CP; a slot format contains 12 OFDM symbols, and the CP of each OFDM symbol is an extended CP; a slot The format contains 7 OFDM symbols, and the CP of each OFDM symbol is the normal CP. It should be understood that the above examples are merely illustrative and should not constitute any limitation to the application.

Table 2

table 3

The terminal equipment can determine the location of the PDSCH transmission resource according to S and L.

It can be seen from Figure 8 that for the 2-symbol mini-slot, when it appears in the symbol 1-2, the symbol 5-6, the symbol 8-9, and the symbol 12-13, L does not change and S will change, so DCI The time-domain resource indication information in the also needs to be updated. Therefore, the network device needs to prepare four different DCIs at the same time to correspond to different possible sending locations or update the DCI indication information in real time according to the LBT result. Both of the above two methods have higher requirements on the capabilities of the network device.

The embodiment of the present application proposes a method to change the time domain resource analysis mode in the DCI so that the network device does not need to update the time domain indication information in the DCI when the mini-slot sending position changes, thereby saving resource overhead.

The various embodiments provided in this application will be described in detail below with reference to the accompanying drawings.

FIG. 9 is a schematic interaction diagram of a method 900 for receiving data and sending data according to an embodiment of the present application. The method 900 may include the following steps.

910. The terminal device receives indication information, where the indication information is used to indicate a time domain resource indication. Correspondingly, the network device sends instruction information to the terminal device.

In the embodiment of the present application, the following solution may be included: the terminal device receives the instruction information. The terminal device determines the time domain resource of the downlink data according to the indication information. Specifically, the terminal device can use the start symbol of the PDCCH and/or the end symbol of the PDCCH as a reference point to determine the time domain resource of the PDSCH. For example, the indication information carries the symbol offset between the PDCCH (or the start symbol of the PDCCH and/or the end symbol of the PDCCH) and the PDSCH (or the start symbol of the PDSCH and/or the end symbol of the PDSCH). The terminal device may determine the start symbol of the PDCCH and/or the end symbol of the PDCCH after receiving the PDCCH. Further, the terminal device can determine the resources occupied by the PDSCH according to the symbol offset carried in the indication information. That is, the terminal device determines the start symbol of the PDSCH and/or the end symbol of the PDSCH, and/or the duration.

The indication information may be carried in the DCI, for example, and the network device may indicate information related to the time domain resource for transmitting data to the terminal device through the DCI, as shown in the indication manner in Table 1 above. After receiving the DCI, the terminal device can determine the time domain resource for transmitting the data, so that the data can be received at the correct location.

In the following embodiments, the indication information is carried on the DCI and the data is PDSCH as an example for description.

Among them, the time domain resource indication may characterize the time domain resource for transmitting downlink data. Specifically, the time domain resource indication includes SLIV. SLIV, PDSCH start and length indicator (start and length indicator, SLIV), or, can also be called PDSCH time domain resource indicator, including the difference between the time domain resources used to transmit data and the time domain resources used to transmit DCI Relative location information.

Optionally, SLIV is used to indicate S and L, S indicates the relative position between the time domain resource used to transmit PDSCH and the time domain resource used to transmit DCI, L indicates the length of the time domain resource used to transmit PDSCH, S and L are integers greater than or equal to zero.

S represents the relative position between the start position of the time domain resource used to transmit the PDSCH and the time domain resource used to transmit the DCI, and S is an integer greater than or equal to 0.

In a possible implementation manner, S may represent the number of symbols (or symbol offsets) between the time domain resources used to transmit PDSCH and the start positions of the time domain resources used to transmit DCI. The terminal device can determine the start position of the time domain resource used to transmit the PDSCH according to the start position of the time domain resource used to transmit the DCI. For example, when S=1, when the start position of the time domain resource used to transmit DCI is symbol 0, the terminal device may determine that the start position of the time domain resource used to transmit PDSCH is symbol 1.

In another possible implementation manner, S may represent the number of symbols between the start position of the time domain resource used for transmitting the PDSCH and the end position of the time domain resource used for transmitting the DCI. The terminal device can determine the start position of the time domain resource used to transmit the PDSCH according to the end position of the time domain resource used to transmit the DCI. For example, when S=0 and the end position of the time domain resource used to transmit DCI is symbol 2, the terminal device may determine that the start position of the time domain resource used to transmit PDSCH is symbol 2.

In the embodiment of the present application, S represents the number of symbols between the time domain resource used to transmit the PDSCH and the start position of the time domain resource used to transmit the DCI as an example for illustration. It should be understood that the way S represents the number of symbols between the start position of the time domain resource used to transmit the PDSCH and the end position of the time domain resource used to transmit the DCI is also applicable to the embodiments of the present application.

Wherein, L represents the duration of the time domain resource used to transmit the PDSCH, and L is an integer greater than or equal to zero. The value of L can be, for example, 2-S, 5-S, 6-S, 7-S, 12-S, 13-S, or 14-S, etc. The specific value of L depends on the number of continuous DCI symbols and Whether the number of symbols for other signals that may exist is half a slot or 1 slot (14 symbols), etc.

The following will describe in detail how the terminal device determines S and L.

The network device indicates the information of S and L to the terminal device through DCI. In other words, the network device indicates to the terminal device the starting position and length of the time domain resource used to transmit the PDSCH through the DCI, so that the terminal device can learn the position of the time domain resource used to transmit the PDSCH, that is, when to start receiving the PDSCH And how long to receive.

The network device indicates the information of S and L to the terminal device through DCI. In a possible implementation manner, the network device indicates the SLIV information to the terminal device through the DCI, and the SLIV is used to indicate S and L. In other words, the terminal equipment parses out the starting position and length of the time domain resources used to transmit PDSCH according to SLIV and the meaning of S and L; in another possible implementation manner, the network equipment indicates S to the terminal equipment through DCI And L, the terminal device parses out the starting position and length of the time domain resource used to transmit PDSCH according to S and L.

In the following, the time-domain resource indication is SLIV as an example to introduce in detail the way the terminal device analyzes the location of the time-frequency resource.

Optionally, before step 910, the method 900 may further include step 901.

901: The network device determines the SLIV.

After the network device determines the SLIV, it can send a message carrying the SLIV to the terminal device. After receiving the SLIV, the terminal device can analyze the location of the time domain resources used to transmit the PDSCH. For example, the terminal device determines the location to start receiving the PDSCH and the length of the received PDSCH , And then you can correctly receive data at the corresponding location.

920: The terminal device receives data based on SLIV.

In other words, the terminal device receives the PDSCH based on the determined resource location for PDSCH transmission.

The manner in which the terminal device analyzes the location of the time domain resources used to transmit the PDSCH will be described in detail below.

Optionally, the terminal device receives second indication information, where the second indication information is used to indicate that S indicates a relative position between a time domain resource used to transmit PDSCH and a time domain resource used to transmit DCI. It can also be understood that the second indication information is used to indicate the manner in which the terminal device analyzes the location of the time domain resource used to transmit the PDSCH.

In other words, the terminal device may determine the manner of analyzing the location of the time domain resource according to the second indication information. As mentioned above, the terminal device can obtain the configuration value of startsymbolandlength through the instruction of DCI, and SLIV can be calculated according to Formula 1:

SLIV=14*(L-1)+S

Formula 1

S is the sequence number of the PDSCH starting symbol (that is, the starting position of the time domain resource used to transmit the PDSCH), and L is the number of symbols for transmitting the PDSCH (that is, the number of symbols lasting for the mini-slot).

In the embodiment of the present application, the terminal device may at least analyze the time domain resource location in any of the following ways.

Method 1, based on the meaning of S for relative position analysis.

In other words, S represents the relative position between the time domain resources used to transmit PDSCH and the time domain resources used to transmit DCI, that is, S is not an absolute sequence number, but a sequence number relative to DCI. The terminal equipment The time domain resource location is resolved based on the relative location.

Method 2, based on the meaning of S for absolute position analysis.

That is to say, S represents the absolute sequence number of the start symbol of the time domain resource used to transmit the PDSCH, and the terminal device resolves the position of the time domain resource based on the absolute position. Illustrate with reference to FIG. 8. In the case of starting position 1, as shown in Figure 8, S is 1, that is, the terminal device starts to receive PDSCH at symbol 1, and in the case of starting position 2 in Figure 8, S is 3, that is, the terminal device starts to receive PDSCH at symbol 3; In the case of starting position 3 in Fig. 8, S is 5, that is, the terminal device starts to receive PDSCH at symbol 5. It can be seen that when the start symbols of the time domain resources used to transmit the PDSCH are different, S will also change.

It should be understood that the foregoing manner 1 and manner 2 are only naming for distinction, and their naming does not limit the protection scope of the embodiments of the present application.

The second indication information may be a display indication or an implicit indication, which is not limited. Described separately below.

In a possible implementation manner, the second indication information is a display indication.

Exemplarily, a field can be added on the basis of the PDCCH instruction, such as an x-bit field, and the added field is used to instruct the terminal device to parse the time domain resource location. Or, it can also be understood that the added field indicates whether S represents the relative symbol sequence number relative to DCI or the absolute sequence number of the start symbol used to transmit the PDSCH, and the terminal device can use the S The meaning of the representation determines the start symbol used to transmit the PDSCH. The length of the DCI after the added field and the DCI before the increase may be the same or different. Among them, x is an integer greater than or equal to 1.

For example, a 1-bit field is used to instruct the terminal device to parse the time domain resource location. Among them, 0 corresponds to the terminal device using mode 1 to resolve the time domain resource location, and 1 corresponds to the terminal device using mode 2 to resolve the time domain resource location. Or, 1 corresponds to the terminal device using mode 1 to resolve the time domain resource location, and 0 corresponds to the terminal device using mode 2 to resolve the time domain resource location. In other words, a 1-bit field can be used to indicate whether the meaning of S is a relative position or an absolute position. It should be understood that the specific instructions are not limited in the embodiment of the present application.

In another possible implementation manner, the second indication information is an implicit indication.

Exemplarily, method 1 may be adopted for mini-slots in one or more slots at the beginning of COT, and method 2 may be adopted for mini-slots or full slots (full slots) in other positions of COT.

In other words, the terminal device can detect the location of the DCI, and determine whether the mini-slot is located in one or more slots at the beginning of the COT based on the location of the DCI. If so, the terminal device uses Method 1 to resolve the time domain resource location; If no, the terminal device uses method 2 to resolve the time domain resource location.

The manner in which the terminal device determines S and L in step 910 will be described in detail below.

There are two scenarios below.

Case 1: Multicast common physical downlink control channel (group common physical downlink control channel, GC PDCCH) occupied time domain resources and/or terminal equipment dedicated physical downlink control channel PDCCH (UE-specific PDCCH) occupied time domain resources Including complete symbols.

Or, it can also be understood that, in this case, PDCCH and PDSCH do not occupy the same symbol. As shown in FIG. 10, CORESET occupies a complete symbol. As mentioned above, CORESET can be used to carry scheduling information. CORESET occupies one complete symbol, which means that PDCCH occupies one complete symbol.

In this case, S is greater than one or equal to one.

Exemplarily, the starting sequence number S of the time domain resource used to transmit the PDSCH may be (T+Δ).

T represents the length of the time domain resource used to transmit DCI, such as the number of continuous symbols; Δ represents an integer greater than or equal to 0, such as Δ=0, 1, 2, 3.... Δ can be pre-defined, configured by the network device, or instructed by the network device to the terminal device, which is not limited.

The following is an exemplary description with reference to the three scenarios (1) to (3) in FIG. 10.

For example, when the time domain resource used to transmit DCI is 1 symbol, that is, T is 1, and S is (1+Δ). A possible implementation, Δ is 0, and S is 1, that is to say, the mini-slot starts from the second symbol, or it can also be understood that the time domain resources used to transmit PDSCH start from the second Symbol start. As shown in (1) in FIG. 10, the time domain resources used to transmit PDSCH start from the second symbol. S can be equivalent to the duration of the PDCCH, L is the number of symbols to transmit PDSCH, and the duration of the mini-slot is equivalent to the duration of the PDCCH plus the duration of the PDSCH, so the duration of the mini-slot is (S+L). For example, for a mini-slot with a duration of 2 symbols, when the DCI lasts for 1 symbol, the value of L is 1; for a mini-slot with a duration of 4 symbols, when the DCI lasts for 1 symbol, the value of L is 3 ; For a mini-slot with a duration of 7 symbols, when the DCI lasts for 1 symbol, the value of L is 6.

For another example, when the time domain resource used to transmit DCI is 2 symbols, that is, T is 2, and S is (2+Δ). A possible implementation manner, Δ is 0, at this time S is 2, that is to say, the mini-slot starts from the third symbol, or it can also be understood that the time domain resources used to transmit PDSCH start from the third symbol Symbol start. As shown in (2) in FIG. 10, the time domain resources used to transmit PDSCH start from the third symbol. The duration of mini-slot is (S+L). For example, for a mini-slot with a duration of 2 symbols, when the DCI lasts for 2 symbols, the value of L is 0; for a mini-slot with a duration of 4 symbols, when the DCI lasts for 2 symbols, the value of L is 2 ; For a mini-slot with a duration of 7 symbols, when the DCI lasts for 2 symbols, the value of L is 5.

For another example, when the time domain resources used to transmit DCI are 3 symbols, that is, T is 3 and S is (3+Δ). A possible implementation manner, Δ is 0, and S is 3 at this time. That is to say, the mini-slot starts from the fourth symbol, or it can also be understood that the time domain resources used to transmit PDSCH start from the fourth symbol. Symbol start. As shown in (3) in FIG. 10, the time domain resources used to transmit the PDSCH start from the fourth symbol. The duration of mini-slot is (S+L). For example, for a mini-slot with a duration of 2 symbols, when the DCI lasts for 2 symbols, the value of L is 0; for a mini-slot with a duration of 4 symbols, when the DCI lasts for 3 symbols, the value of L is 1 ; For a mini-slot with a duration of 7 symbols, when the DCI lasts for 3 symbols, the value of L is 4.

The foregoing exemplified description with Δ being 0. It should be understood that the embodiments of the present application are not limited to this. For example, Δ may be greater than 0, that is, the time domain resources used to transmit PDSCH and the time domain used to transmit DCI The resources may not be adjacent. For example, the time domain resources used to transmit PDSCH and the time domain resources used to transmit DCI may reserve a part of resources for use by other signals, and so on.

In case 1, when the time domain resources used to transmit the DCI are different, the PDSCH corresponding to the DCI is also in a different position accordingly. Because S represents the relative positional relationship between DCI and PDSCH, the value of S will not change, so there is no need to update the mini-slot when it appears in different positions (that is, when the starting position for transmitting PDSCH is different) DCI.

Optionally, the terminal device may also determine the frequency domain resources used to transmit the PDSCH.

In a possible implementation manner, the frequency domain resources used to transmit the PDSCH may be: one or more 20 MHz frequency domain bandwidths.

Considering that LBT is generally performed at a granularity of 20 MHz, it can be specified in advance that its frequency domain resources occupy one or more frequency domain bandwidths of 20 MHz. At this time, the frequency domain indication information in the DCI can be: indicating one or more 20MHz frequency domain bandwidths, so the frequency domain indication information in the DCI can be simplified, or the frequency domain indication information may not need to be used. The frequency domain indication information in the indication frequency domain can be used for other LBT-related indications.

Based on the above situation 1, when the time domain resources used to transmit the DCI are different, the PDSCH corresponding to the DCI is also in a different position accordingly. Because S represents the relative positional relationship between DCI and PDSCH, the value of S will not change, so there is no need to update the mini-slot when it appears in different positions (that is, when the starting position for transmitting PDSCH is different) DCI, in turn, can save resources and signaling overhead, and reduce transmission delay.

Case 2: The time domain resources occupied by the GC-PDCCH and/or the UE-specific time domain resources occupied by the PDCCH do not occupy complete symbols.

Or, it can also be understood that in this case, the PDCCH and PDSCH are transmitted on the same symbol, that is, the time domain resources used to transmit the PDCCH and the time domain resources used to transmit the PDSCH partially or completely overlap. As shown in Figure 11, CORESET and PDSCH are transmitted in the same symbol.

Since the PDSCH is always transmitted from the first symbol, in this case, S is equal to 0. In this case, L is equal to the number of continuous symbols of the mini-slot. For example, for a mini-slot with a duration of 2 symbols, the value of L is 2, that is, S+L is equal to the number of continuous symbols of the mini-slot 2. For another example, for a mini-slot with a duration of 4 symbols, the value of L is 4, that is, S+L is equal to the number of continuous symbols 4 of the mini-slot. For another example, for a mini-slot with a duration of 7 symbols, the value of L is 7, that is, S+L is equal to the number of continuous symbols of the mini-slot 7.

Optionally, in this case, the terminal device may obtain the first indication information to determine the frequency domain resource used to transmit the PDSCH.

It can also be understood that, considering that the PDSCH and the PDCCH are transmitted on the same symbol, the terminal device needs to obtain the position of the frequency domain resource for transmitting the PDSCH, so as to obtain the time-frequency domain resource for transmitting the PDSCH.

The first indication information may be carried in the DCI, that is, the network device may indicate the frequency domain resource for transmitting the PDSCH to the terminal device through the DCI. For example, a field can be added on the basis of the PDCCH command, such as a y-bit field, where y is an integer greater than or equal to 1, and the terminal device is indicated by the added field. In the same symbol, the frequency domain resource used to transmit PDSCH is The frequency domain resources used to transmit PDCCH do not overlap.

The first indication information may be a display indication or an implicit indication, which is not limited. The following is a description of several scenarios.

In case 2, the frequency domain resources used to transmit the PDSCH and the frequency domain resources used to transmit the PDCCH do not overlap. The following is an exemplary description with reference to 4 scenarios.

Scenario 1: UE-specific PDCCH is transmitted in GC-PDCCH CORESET.

In this scenario, the first indication information may be used to indicate that the frequency domain resources used for PDSCH transmission and the frequency domain resources occupied by the GC-PDCCH do not overlap.

In a possible implementation manner, the first indication information may be a preset rule (such as a default rule or a rule stipulated by an agreement), which may be understood as an implicit indication. That is to say, when UE-specific PDCCH is transmitted in GC-PDCCH CORESET, it can be specified that the transmission resource of GC-PDCCH CORESET will not be used for PDSCH transmission. In this implementation manner, acquiring the first indication information by the terminal device can be understood to mean that the terminal device determines that the PDSCH is transmitted at a frequency domain location that does not overlap the transmission resource of GC-PDCCH CORESET in the same symbol according to a preset rule.

In another possible implementation manner, the first indication information may also be sent by the network device to the terminal device, and may be understood as a display indication. The terminal device receives the first indication information, and determines, according to the first indication information, that the PDSCH is transmitted at a frequency domain position that does not overlap the transmission resource of the GC-PDCCH CORESET in the same symbol.

Scenario 2: UE-specific PDCCH is transmitted outside GC-PDCCH CORESET.

In this scenario, the first indication information may be used to indicate that the frequency domain resources used for PDSCH transmission, the frequency domain resources occupied by the GC-PDCCH, and the frequency domain resources occupied by the UE-specific PDCCH do not overlap.

In a possible implementation manner, the first indication information may be a preset rule (such as a default rule or a rule stipulated by an agreement), which may be understood as an implicit indication. In other words, when UE-specific PDCCH is transmitted outside GC-PDCCH CORESET, it can be specified that neither the transmission resource of GC-PDCCH CORESET nor the transmission resource of UE-specific PDCCH will be used for PDSCH transmission. In this implementation manner, the terminal device acquiring the first indication information can be understood as the terminal device determining according to preset rules that the PDSCH does not overlap with the transmission resources of GC-PDCCH CORESET in the same symbol, and does not overlap with the UE-specific PDCCH at the same time. The transmission resources overlap the frequency domain position.

In another possible implementation manner, the first indication information may also be sent by the network device to the terminal device, and may be understood as a display indication. The terminal device receives the first indication information, and determines according to the first indication information that the PDSCH does not overlap with the transmission resource of GC-PDCCH CORESET in the same symbol, and at the same time does not overlap with the transmission resource of UE-specific PDCCH, and transmits .

Scenario 3: The transmission resource of GC-PDCCH is fixed.

In this scenario, the first indication information may be used to indicate that the frequency domain resources used to transmit the PDSCH are resources other than the frequency domain resources occupied by the GC-PDCCH.

In a possible implementation manner, the first indication information may be a preset rule (such as a default rule or a rule stipulated by an agreement), which may be understood as an implicit indication. In other words, when the transmission resource of the GC-PDCCH is fixed, it can be specified that all resources other than the transmission resource of the GC-PDCCH can be used for PDSCH transmission. In this implementation manner, acquiring the first indication information by the terminal device can be understood as that the terminal device determines that the transmission resource of the PDSCH is a resource other than the frequency domain resource occupied by the GC-PDCCH according to a preset rule.

In another possible implementation manner, the first indication information may also be sent by the network device to the terminal device, and may be understood as a display indication. The terminal device receives the first indication information, and determines, according to the first indication information, that the transmission resource of the PDSCH is a resource other than the frequency domain resource occupied by the GC-PDCCH.

In this scenario, the transmission resource of the GC-PDCCH may be instructed by the network device to the terminal device, or may be agreed upon between the terminal device and the network device, which is not limited.

Scenario 4: GC-PDCCH is not transmitted.

In this scenario, the first indication information may be used to indicate that the frequency domain resources used for PDSCH transmission and the frequency domain resources occupied by the UE-specific PDCCH do not overlap.

In a possible implementation manner, the first indication information may be a preset rule (such as a default rule or a rule stipulated by an agreement), which may be understood as an implicit indication. In other words, when the GC-PDCCH is not transmitted, it can be specified that the transmission resources of the UE-specific PDCCH will not be used for PDSCH transmission. In this implementation manner, acquiring the first indication information by the terminal device may be understood to mean that the terminal device determines according to a preset rule that the PDSCH is transmitted at a frequency domain location that does not overlap the transmission resource of the UE-specific PDCCH in the same symbol.

In another possible implementation manner, the first indication information may also be sent by the network device to the terminal device, and may be understood as a display indication. The terminal device receives the first indication information, and determines, according to the first indication information, that the PDSCH is sent at a frequency domain position that does not overlap the transmission resource of the UE-specific PDCCH in the same symbol.

Optionally, in this scenario, the UE-specific PDCCH may also include first indication information for indicating that the GC-PDCCH is not transmitted.

The foregoing exemplarily introduces the method for the terminal device to determine the frequency domain resource of the PDSCH in case 2. It should be understood that the embodiment of the present application is not limited to this, and any method that enables the terminal device to determine the frequency domain resource of the PDSCH falls within It falls into the protection scope of the embodiments of this application. For example, the network device may indicate the relative position between the frequency domain resource of the PDSCH of the terminal device and the frequency domain resource of the UE-specific PDCCH, and based on the relative position, the terminal device may also determine the frequency domain resource of the PDSCH.

Based on the above situation 2, when the mini-slot appears in different positions in the slot, there is no need to update the DCI time domain indication information, which can save signaling overhead. In addition, in case 2 above, it also provides a way to perform rate matching when the PDSCH and PDCCH are carried on the same symbol, that is, to determine the time domain resources used to transmit the PDSCH based on the frequency domain resource analysis method.

Optionally, the terminal device may determine the position of the time-frequency resource used to transmit the PDSCH according to one or more of the following: the time-frequency resource used to transmit the synchronization signal block (SS block, SSB), and the channel state information reference Signal (channel state information-reference signal, CSI-RS) time-frequency resources, time-frequency resources used to transmit paging (paging), or demodulation reference signal (demodulation reference signal, DMRS) used to demodulate PDSCH Time-frequency resources.

The following takes the PDSCH as the remaining minimum system information (RMSI) PDSCH as an example, and exemplifies the description with reference to FIGS. 12 to 14.

For different subcarrier spacing (SCS), for example, 15kHz and 30kHz, the corresponding symbol length is different. For example, RMSI CORESET corresponding to a sub-carrier spacing of 15KHz generally occupies 48 RB in the frequency domain and 1 symbol in the time domain; RMSI CORESET corresponding to a sub-carrier spacing of 30KHz generally occupies 96 RB in the frequency domain, and in the time domain Generally occupy 2 symbols. In addition, in the 20MHz frequency domain bandwidth, 15KHz or 30KHz subcarriers can correspond to 51 available subcarriers or 106 available subcarriers.

Firstly, a method of sending RMSI PDSCH, RMSI CORESET, and SSB is introduced in conjunction with Figure 12 and Figure 13.

Let me introduce SSB first. In some cases, SSB can also be called synchronization signal/physical broadcast channel block (SS/PBCH block). SSB: In the time domain, one SSB can be composed of 4 OFDM symbols. In the frequency domain, one SSB can be composed of, for example, 240 continuous subcarriers, that is, 20 continuous RBs.

SSB can be understood as a block of resources used to transmit SS and/or PBCH. The network device can send the PBCH and synchronization signal on the resource, or only send the PBCH or only the synchronization signal in the resource. Among them, the synchronization signal may include a primary synchronization signal (PSS) and a secondary synchronization signal (secondary synchronization signal, SSS).

In a certain time slot, the symbols that SSB may occupy are {2, 3, 4, 5}, {8, 9, 10, 11}, and {9, 10, 11, 12}, as shown in Figure 12 and Shown in Figure 13.

It should be noted that FIG. 12 and FIG. 13 are only the meaning of the symbols used to facilitate understanding of the SSB, and should not constitute any limitation to this application. It should be understood that the free padding part in FIG. 13 can be used to transmit uplink data and/or downlink data, which is not limited.

As shown in Figure 12, SSB and RMSI PDSCH may coexist in the same symbol, as shown in (1) in Figure 12, the symbol {2, 3, 4, 5}; or, SSB, RMSI PDSCH, and CSI-RS may coexist For the same symbols, the symbols {8, 9, 10, 11} shown in (1) in FIG. 12 or the symbols {9, 10, 11, 12} shown in (2) in FIG. As shown in Figure 13, SSB and RMSI PDSCH may coexist in the same symbol, as shown in Figure 13 with symbols {2, 3, 4, 5}; or, SSB, RMSI PDSCH, and CSI-RS may coexist in the same symbol , The symbol {8,9,10,11} as shown in Figure 13. In other words, the transmission resources of SSB, RMSI PDSCH, and CSI-RS may overlap. In this case, the terminal device needs to consider transmission resources such as SSB and CSI-RS when determining the transmission resource of the RMSI PDSCH, that is, it needs to perform rate matching. Wherein, the transmission resources include time domain resources and/or frequency domain resources. The following is an exemplary description from the perspective of time domain resources and frequency domain resources.

Frequency domain resources

An example is described in conjunction with the situation shown in (1) in FIG. 12.

As shown in (1) in Figure 12, SSB and RMSI PDSCH coexist with the same symbol {2, 3, 4, 5}. Then, on the symbols {2, 3, 4, 5}, the frequency domain resources used to transmit PDSCH are resources other than the frequency domain resources used to transmit SSB. As shown in (1) in FIG. 12, the frequency domain resources used to transmit PDSCH and the frequency domain resources used to transmit PSS, PBCH, and SSS do not overlap. In other words, the frequency domain resources used to transmit PDSCH are frequency domain resources other than those used to transmit PSS, PBCH, and SSS. Alternatively, it can also be understood that, for a section of frequency domain resources, the frequency domain resources used for transmitting PDSCH are frequency domain resources on the section of frequency domain resources except for frequency domain resources used for transmitting PSS, PBCH, and SSS.

As shown in (1) in Figure 12, SSB and RMSI PDSCH coexist at the same symbol {8, 9, 10, 11}. Then on the symbols {8, 9, 10, 11}, the frequency domain resources used to transmit the PDSCH are resources other than the frequency domain resources used to transmit the SSB. As shown in (1) in FIG. 12, the frequency domain resources used to transmit PDSCH and the frequency domain resources used to transmit PSS, PBCH, and SSS do not overlap. In other words, the frequency domain resources used to transmit PDSCH are frequency domain resources other than those used to transmit PSS, PBCH, and SSS. Or, it can also be understood that, for a certain segment of frequency domain resources, the frequency domain resources used to transmit the PDSCH are frequency domain resources on the segment of frequency domain resources except for the frequency domain resources used to transmit PSS, PBCH, and SSS.

Among them, the frequency domain resources used to transmit the SSB are fixed, so the network device may not indicate to the terminal device.

Time domain resources

In a possible scenario, at most 2 SSBs and corresponding RMSI can be sent in a slot. The discovery reference signal (discovery reference signal, DRS) block composed of one SSB and the corresponding RMSI can have a duration of 7 symbols. When 1 symbol or 2 symbols are used to transmit RMSI CORESET, RMSI PDSCH can occupy 5 symbols or 6 symbols. Alternatively, when the RMSI CORESET is carried on 1 symbol or 2 symbols, the RMSI PDSCH can be carried on 5 symbols or 6 symbols. In this case, the unauthorized communication system can support a mini-slot with a length of 5 symbols and/or a mini-slot with 6 symbols.

It should be understood that the foregoing is only an exemplary description, and the embodiments of the present application are not limited thereto.

The following two scenarios are combined.

Case A: RMSI PDSCH is not transmitted in symbols that appear on RMSI PDCCH (for example, it can be recorded as CORESET 0).

Similar to the situation in FIG. 10, the time domain resource indication mode of the RMSI PDSCH at this time can refer to Case 1 described above, for example, the starting sequence number S of the time domain resource used to transmit the PDSCH is greater than 0. For details, refer to the description of Case 1, which will not be repeated here.

RMSI PDSCH may coexist with channels or signals such as SSB, CSI-RS, and paging on some symbols, as shown in Figure 12. When determining the transmission resources of the RMSI PDSCH, the terminal device needs to consider the transmission resources such as SSB and CSI-RS. Among them, regarding the time-frequency resources used to transmit the SSB, the time-frequency resources used to transmit the SSB are fixed, so no indication is required. Regarding the time-frequency resources used to transmit CSI-RS and paging, the network equipment can instruct the terminal equipment to use the resources for transmitting CSI-RS and paging through separate signaling, or through SSB (or PBCH in SSB) or RMSI CORESET Whether it exists, and the specific time domain location.

In this case, the value of L can be, for example, 7-S, 14-S, 5-S, 6-S, 12-S, or 13-S, etc. The specific value of L depends on the number of continuous symbols of the RMSI Is it half a slot or 1 slot (14 symbols) and possible channel configurations such as CSI-RS and paging.

Exemplarily, the time-frequency resource used to transmit the RMSI PDSCH may be determined according to the time-frequency resource used to transmit the CSI-RS.

For example, the time domain resources used to transmit RMSI PDSCH and the time domain resources used to transmit CSI-RS do not overlap. Similar to the situation in Figure 10, when the RMSI CORESET lasts for 1 symbol and the second symbol is used for CSI-RS transmission, the RMSI PDSCH can be carried on the third symbol, or the fourth symbol, or the fifth symbol. Symbol, or one or more symbols on the sixth symbol.

For another example, the time domain resources used to transmit the RMSI PDSCH and the time domain resources used to transmit CSI-RS overlap. Then the frequency domain resources used to transmit RMSI PDSCH and the frequency domain resources used to transmit CSI-RS do not overlap. After the terminal device obtains the frequency domain resources used to transmit CSI-RS, it can use the frequency domain resources used to transmit CSI-RS. Resource analysis other than domain resources is used to transmit RMSI PDSCH frequency domain resources.

Exemplarily, the time domain resource used to transmit the RMSI PDSCH may be determined according to the time domain resource used to transmit paging.

For example, the time domain resources used to transmit the RMSI PDSCH and the time domain resources used to transmit paging do not overlap. For example, when the RMSI CORESET lasts for 1 symbol and the second symbol is used for paging transmission, the RMSI PDSCH can be carried on the third symbol, or the fourth symbol, or the fifth symbol, or the sixth symbol. Of one or more symbols.

For another example, the time domain resources used to transmit the RMSI PDSCH and the time domain resources used to transmit paging overlap. Then the frequency domain resources used to transmit RMSI PDSCH and the frequency domain resources used to transmit paging do not overlap. After the terminal device obtains the frequency domain resources used to transmit paging, it can use resources other than the frequency domain resources used to transmit paging. Analyze the frequency domain resources used to transmit RMSI PDSCH.

Exemplarily, the time domain resource used to transmit the RMSI PDSCH may be determined according to the time domain resource used to transmit the SSB.

For example, the time domain resources used to transmit the RMSI PDSCH and the time domain resources used to transmit the SSB do not overlap.

Case B: The symbol transmission of RMSI PDSCH in RMSI PDCCH (CORESET 0).

At this time, the time domain resource indication mode of the RMSI PDSCH can refer to the case 2 described above, that is, the starting sequence number S of the time domain resource used to transmit the PDSCH is 0. For details, refer to the description of Case 2.

Similarly, RMSI PDSCH may also coexist with channels or signals such as SSB, CSI-RS, and paging on certain symbols. Among them, SSB time-frequency resources are fixed and do not need to be indicated. Whether CSI-RS and paging resources exist and the specific time domain The location can be indicated to the terminal device. For example, by indicating in the SSB or RMSI CORESET, the terminal device obtains the time-frequency resource location actually occupied by the RMSI PDSCH according to the above information.

In this case, the value of L may be: 7-S, 14-S, 5-S, 6-S, 12-S, or 13-S. The specific value of L depends on the number of continuous symbols of RMSI PDCCH: Half a slot is still 1 slot (14 symbols) and possible channel configurations such as CSI-RS and paging.

Optionally, in this case, the terminal device may obtain the third indication information to determine the frequency domain resource used to transmit the RMSI PDSCH.

That is to say, in this case, the terminal device also needs to know the frequency domain resources of the RMSI PDSCH in the first symbol and/or the second symbol (ie, the RMSI PDSCH and the RMSI CORESET coexistence symbol).

The terminal device obtains the third indication information, and determines the location of the frequency domain resource used for transmitting the RMSI PDSCH according to the third indication information. The third indication information, or the frequency domain resource information, may be pre-defined, for example, it may be directly given by a standard; or, it may be indicated in the DCI or PBCH.

Exemplarily, the terminal device may determine the frequency domain resource used to transmit the RMSI and PDSCH according to the frequency domain resource used to transmit the RMSI and CORESET.

For example, the third indication information may indicate that the frequency domain resources used to transmit RMSI PDSCH do not overlap with the frequency domain resources used to transmit RMSI CORESET. Then, after the terminal device learns the frequency domain resources used to transmit RMSI CORESET, it may 3. The indication information determines that the frequency domain resources used to transmit RMSI PDSCH and the frequency domain resources used to transmit RMSI CORESET do not overlap, that is, the frequency domain resources used to transmit RMSI PDSCH are among the frequency domain resources used to transmit RMSI CORESET External resources.

Exemplarily, the terminal device may determine the frequency domain resource used to transmit RMSI and PDSCH according to the frequency domain resource used to transmit RMSI and CORESET and the frequency domain resource used to transmit SSB.

For example, the third indication information may indicate that the frequency domain resources used to transmit RMSI PDSCH do not overlap with the frequency domain resources used to transmit SSB and the frequency domain resources used to transmit RMSI CORESET. Then, the terminal device knows that it is used to transmit SSB After the frequency domain resources used to transmit RMSI CORESET, the frequency domain resources used to transmit RMSI PDSCH, the frequency domain resources used to transmit SSB, and the frequency domain resources used to transmit RMSI CORESET can be determined according to the third indication information. None of the domain resources overlap, that is, the frequency domain resources used to transmit RMSI and PDSCH are the frequency domain resources used to transmit RMSI CORESET and resources other than the frequency domain resources used to transmit SSB.

Exemplarily, the terminal device may determine the frequency domain resource used for transmitting RMSI and PDSCH according to the frequency domain resource used for transmitting RMSI and CORESET and the frequency domain resource used for transmitting CSI-RS and/or paging.

For example, the third indication information may indicate that the frequency domain resources used to transmit RMSI PDSCH do not overlap with the frequency domain resources used to transmit CSI-RS and/or paging, and the frequency domain resources used to transmit RMSI CORESET. Then, the terminal After the device learns the frequency domain resources used to transmit CSI-RS and/or paging and the frequency domain resources used to transmit RMSI CORESET, it can determine the frequency domain resources used to transmit RMSI PDSCH and the frequency domain resources used to transmit CSI according to the third indication information. -RS and/or paging frequency domain resources and frequency domain resources used to transmit RMSI CORESET do not overlap, that is, frequency domain resources used to transmit RMSI PDSCH are frequency domain resources used to transmit RMSI CORESET, and Resources other than frequency domain resources for transmitting CSI-RS and/or paging.

The foregoing exemplarily introduces the manner in which the terminal device determines the frequency domain resource used to transmit the RMSI PDSCH in case B. It should be understood that the embodiment of the present application is not limited to this, and any terminal device can determine to transmit the RMSI PDSCH All of the frequency domain resource modes fall within the protection scope of the embodiments of this application. For example, the network device may indicate the relative position between the frequency domain resource of the RMSI PDSCH of the terminal device and the frequency domain resource of the RMSI CORESET, and based on the relative position, the terminal device may also determine the frequency domain resource of the RMSI PDSCH.

Optionally, the terminal device may also determine the frequency domain resource used to transmit the RMSI PDSCH according to the time-frequency resource of the demodulation reference signal DMRS used to demodulate the PDSCH.

The mapping mode of the demodulation reference signal (PDSCH DMRS) used for the physical shared channel includes, for example, mapping type A (mapping type A) and mapping type B (mapping type B). Figure 13 shows the PDSCH DMRS of mapping type B. As shown in Figure 13, there are many possible scenarios for the location of PDSCH DMRS. (1) in Fig. 13 exemplarily shows several possible positions when PDSCH DMRS occupies a single-symbol, and (2) in Fig. 13 exemplarily shows PDSCH DMRS occupies a double symbol ( Several possible positions for double-symbol).

For PDSCH with a mapping type of type B, if the PDSCH and the CORESET configured for GC-PDCCH are sent on the same symbol, the PDSCH will perform rate matching according to the configured CORESET. In addition, when the time domain resources or frequency resources allocated for the GC-PDCCH are fixed resources, the CORESET subset (if any) will be punctured for PDSCH allocation. In addition, if the PDSCH and the CORESET configured for the GC-PDCCH are sent on the same symbol, the DMRS used to demodulate the PDSCH is not sent on this symbol. The time position of the DMRS used to demodulate the PDSCH will be shifted back (or switched to other symbols). For example, when 1-symbol CORESET is configured for 2-slot mini-slot, the DMRS used to demodulate PDSCH can be sent on the second symbol of mini-slot; when 1-symbol or 2-symbol CORESET is configured for 4 When the symbol is mini-slot, the DMRS used to demodulate the PDSCH can be sent on the second or third symbol of the mini-slot.

For RMSI PDSCH with a duration of 2 symbols, 4 symbols, and 7 symbols, the first symbol can all be used to carry RMSI CORESET. When RMSI CORESET lasts for 1 or 2 symbols, PDSCH DMRS can be carried on the second symbol. Symbol and/or the seventh symbol; when the second symbol is used for CSI-RS or paging transmission, the PDSCH DMRS can be carried on the third symbol, or the fourth symbol, or the fifth symbol, or the 6 symbols. Considering that the above symbols may be used to carry SSB at the same time, in this case, the frequency domain resources used to transmit PDSCH DMRS and the frequency domain resources used to transmit SSB do not overlap, that is, PDSCH DMRS is carried on the above symbols and SSB frequency domain does not overlap subcarriers.

When the terminal equipment performs downlink channel estimation, it can use PBCH DMRS and PDSCH DMRS to jointly perform channel estimation. When the PDSCH DMRS is carried on the second symbol, the seventh symbol, or other symbols, and the symbol is also used for the transmission of the RMSI PDSCH or paging (the frequency domain resources of the two transmissions do not overlap), when analyzing the RMSI PDSCH Or rate matching is required during paging. Specifically, the frequency domain subcarriers corresponding to PDSCH DMRS can be removed or ignored, that is, the frequency domain resources used to transmit RMSI PDSCH or the frequency domain resources used to transmit paging are used for transmission PDSCH DMRS resources other than frequency domain resources.

In the existing NR standard, RMSI PDSCH supports continuous RB mapping in the frequency domain, and does not support rate matching operations on SSB. In an unlicensed communication system, RMSI PDSCH needs to be considered for rate matching with SSB, because the joint transmission of the two can compress the time domain duration of the overall transmission signal. When the DRS transmission duration is less than 1ms, a higher priority LBT (such as CAT2, 2 symbol mini-slot) can be used to increase the probability of its successful transmission. When the RMSI PDSCH performs rate matching on the SSB, the transmission time of the DMRS used to demodulate the PDSCH may be offset because it cannot occupy the same symbol as the SSB that is transmitted together. When the SSB transmission mode is shown in Figure 12 (2), the RMSI PDSCH DMRS can be in symbol 1 or symbol 6 (corresponding to the first SSB in the slot) or symbol 8 or symbol 13 (corresponding to the 12th SSB in the slot) ), the specific transmission time domain position depends on whether the configured CORESET is 1 symbol or 2 symbols.

In the existing NR standard, for mini-slots of 4 symbols and 7 symbols, the first DMRS is not allowed to appear after the 4th symbol and the 4th symbol. For unlicensed communication systems, this restriction needs to be lifted. As mentioned above, RMSI PDSCH DMRS may appear in symbol 6 or symbol 13. Another possible solution is that the terminal device may use the PBCH DMRS and RMSI PDSCH DMRS sent on symbol 2 or symbol 9 to perform channel measurement together (such as channel estimation for the entire 20MHz bandwidth) for RMSI PDSCH demodulation . In this case, the RMSI PDSCH can be transmitted on symbol 1, symbol 6, symbol 8, and symbol 13.

When the RMSI PDSCH transmission lasts for 5 or 6 symbols, an additional combination of S and L needs to be added, for example, S remains unchanged. The value of L can be any of 2, 4, 5, 6, and 7.

Based on the above solution, when the RMSI PDSCH appears in different positions in the slot, there is no need to update the DCI time domain indication information, and it shows how the terminal device performs the PDSCH frequency domain on the symbols where the RMSI PDSCH and RMSI CORESET coexist according to different situations. The method of resource analysis, and how to parse SSB and possible CSI-RS, paging and other signals, that is, how to perform rate matching, so that the terminal device can learn the time-frequency resource for transmitting PDSCH, and then accurately receive data.

It should be understood that the above embodiments are described by taking the data as PDSCH as an example. It should be understood that the embodiments of the present application may also be applied to other types of data. It should also be understood that all the above symbols can be replaced with OFDM symbols.

Based on the above description, in the solution provided by the embodiment of the present application, the network device indicates the SLIV to the terminal device through DCI, and the SLIV includes information about the relative position between the time domain resource used to transmit data and the time domain resource used to transmit DCI, Therefore, no matter where the network device succeeds in LBT, or in other words, when the starting position of the time domain resource used to transmit data appears in a different time domain position, the time domain resource indication information in the DCI does not need to be updated, because SLIV It indicates the relative position between the time domain resources used to transmit data and the time domain resources used to transmit DCI, so as to avoid waste of resources, reduce requirements on network equipment, and ensure that terminal equipment correctly obtains transmission data In order to receive data correctly, the data transmission performance can be guaranteed.

The various embodiments described in this document may be independent solutions, or may be combined according to internal logic, and these solutions fall within the protection scope of the present application.

It is understandable that, in the foregoing method embodiments, the methods and operations implemented by terminal devices can also be implemented by components (such as chips or circuits) that can be used in terminal devices, and the methods and operations implemented by network devices can also be implemented by It can be implemented by components (such as chips or circuits) of network devices.

The foregoing mainly introduces the solutions provided by the embodiments of the present application from the perspective of each interaction. It can be understood that each network element, such as a transmitting end device or a receiving end device, includes hardware structures and/or software modules corresponding to each function in order to realize the above functions. Those skilled in the art should be aware that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiments of the present application can divide the transmitter device or the receiver device into functional modules according to the above method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. in. The above-mentioned integrated modules can be implemented in the form of hardware or software function modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The following is an example of using the corresponding functional modules to divide each functional module.

Above, the method provided by the embodiment of the present application has been described in detail with reference to FIGS. 9 to 14. Hereinafter, the communication device provided by the embodiment of the present application will be described in detail with reference to FIG. 15 to FIG. 18. It should be understood that the description of the device embodiment and the description of the method embodiment correspond to each other. Therefore, for the content that is not described in detail, please refer to the above method embodiment. For brevity, details are not repeated here.

The foregoing mainly introduces the solution provided by the embodiment of the present application from the perspective of interaction between various network elements. It can be understood that each network element, such as a transmitting end device or a receiving end device, includes hardware structures and/or software modules corresponding to each function in order to realize the above functions. Those skilled in the art should be aware that, in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to realize the described functions, but this realization should not be considered beyond the scope of this application.

The embodiments of the present application can divide the transmitter device or the receiver device into functional modules according to the above method examples. For example, each functional module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. in. The above-mentioned integrated modules can be implemented in the form of hardware or software functional modules. It should be noted that the division of modules in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation. The following is an example of dividing each function module corresponding to each function.

FIG. 15 is a schematic block diagram of a communication device provided by an embodiment of the present application. As shown in the figure, the communication device 1500 may include a communication unit 1510 and a processing unit 1520. The communication unit 1510 can communicate with the outside, and the processing unit 1520 is used for data processing. The communication unit 1510 may also be referred to as a communication interface or a transceiving unit.

In a possible design, the communication device 1500 can implement the steps or processes performed by the terminal device corresponding to the above method embodiment, for example, it can be a terminal device, or a chip or circuit configured in the terminal device. At this time, the communication device 1500 may be referred to as a terminal device. The communication unit 1510 is used to perform the transceiving-related operations on the terminal device side in the above method embodiment, and the processing unit 1520 is used to perform the processing related operations on the terminal device in the above method embodiment.

In a possible implementation manner, the communication unit 1510 is configured to receive downlink control information DCI, where the DCI is used to indicate a time domain resource indication, and the time domain resource indication includes a time domain resource used to transmit data and a DCI used to transmit the DCI. Information about the relative position between time domain resources; the processing unit 1520 is configured to determine a time domain resource indication; the communication unit 1510 is further configured to: receive data based on the time domain resource indication.

Optionally, the time domain resource indicator is used to indicate S and L, S represents the number of symbols between the time domain resource used to transmit data and the start position of the time domain resource used to transmit DCI, and L indicates the number of symbols used for transmission. The length of the time domain resource of the data, S and L are integers greater than or equal to 0.

Optionally, the value of S is any one of the following: T, T+1, T+2; where T represents the number of symbols occupied by time domain resources used to transmit DCI, and T is greater than 1 or equal to 1. Integer.

Optionally, the communication unit 1510 is further configured to obtain first indication information, where the first indication information is used to indicate frequency domain resource information used to transmit data.

Optionally, the first indication information is used to indicate any of the following: frequency domain resources used for data transmission do not overlap with frequency domain resources occupied by GC-PDCCH; or, frequency domain resources used for data transmission and the communication device The frequency domain resources occupied by the 1500 dedicated PDCCH do not overlap; or, the frequency domain resources used for data transmission do not overlap with the frequency domain resources occupied by the GC-PDCCH and the frequency domain resources occupied by the communication device 1500 dedicated PDCCH; or , The frequency domain resources used for data transmission are resources other than the frequency domain resources occupied by GC-PDCCH, and the first indication information includes information about the frequency domain resources occupied by GC-PDCCH; or, the frequency domain used for data transmission The resources do not overlap with the frequency domain resources occupied by the dedicated PDCCH of the communication device 1500, and the dedicated PDCCH of the communication device 1500 includes indication information for indicating that the GC-PDCCH is not transmitted.

Optionally, the communication unit 1510 is further configured to: receive second indication information, where the second indication information is used to indicate that S indicates the difference between the time domain resource used to transmit data and the start position of the time domain resource used to transmit DCI. The number of symbols.

Optionally, the processing unit 1520 is further configured to: determine the position of the time-frequency resource used to transmit data according to one or more of the following: the time-frequency resource used to transmit the synchronization signal block, and the channel state information reference signal CSI -RS time-frequency resources, time-frequency resources used to transmit paging, or time-frequency resources of demodulation reference signal DMRS used to demodulate data.

The communication device 1500 may implement the steps or processes executed by the terminal device in the method 900 according to the embodiment of the present application. The communication device 1500 may include a unit for executing the method executed by the terminal device in the method 900 in FIG. 9 . In addition, each unit in the communication device 1500 and other operations and/or functions described above are used to implement the corresponding process of the method 900 in FIG. 9.

Wherein, when the communication device 1500 is used to execute the method 900 in FIG. 9, the communication unit 1510 may be used to execute steps 910 and 920 in the method 900, and the processing unit 1520 may be used to execute the terminal device determination time-frequency resource in the method 900 Location and other steps.

It should be understood that the specific process for each unit to execute the foregoing corresponding steps has been described in detail in the foregoing method embodiment, and is not repeated here for brevity.

It should also be understood that the communication unit 1510 in the communication device 1500 may be implemented by the transceiver 1710 in the terminal device 1700 shown in FIG. 17, and the processing unit 1520 in the communication device 1500 may be implemented by the terminal device shown in FIG. The processor 1720 in 1700 is implemented. Among them, the transceiver may include a transmitter and/or a receiver, which respectively implement the functions of the sending unit and the receiving unit.

It should also be understood that the communication unit 1510 in the communication device 1500 may also be an input/output interface.

In another possible design, the communication device 1500 can implement the steps or processes performed by the network device corresponding to the above method embodiment, for example, it can be a network device, or a chip or circuit configured in the network device. At this time, the communication device 1500 may be referred to as a network device. The communication unit 1510 is configured to perform the transceiving-related operations on the network device side in the above method embodiment, and the processing unit 1520 is configured to perform the processing related operations on the network device in the above method embodiment.

In a possible implementation manner, the processing unit 1520 is configured to: determine the time domain resource indication; the communication unit 1510 is configured to: send DCI to the terminal device, the DCI includes information about the time domain resource indication, and the time domain resource indication includes information for transmitting data. Information on the relative position between the time domain resource and the time domain resource used to transmit DCI.

Optionally, the communication unit 1510 is further configured to send first indication information to the terminal device, where the first indication information is used to indicate frequency domain resource information used for data transmission.

Optionally, the first indication information is used to indicate any of the following: frequency domain resources used for data transmission do not overlap with frequency domain resources occupied by GC-PDCCH; or, frequency domain resources used for data transmission and terminal equipment The frequency domain resources occupied by the dedicated PDCCH do not overlap; or, the frequency domain resources used for data transmission do not overlap with the frequency domain resources occupied by the GC-PDCCH and the frequency domain resources occupied by the terminal equipment dedicated PDCCH; or, use The frequency domain resources used for data transmission are resources other than the frequency domain resources occupied by the GC-PDCCH, and the first indication information includes information about the frequency domain resources occupied by the GC-PDCCH; or, the frequency domain resources used for data transmission are related to The frequency domain resources occupied by the terminal equipment dedicated PDCCH do not overlap, and the terminal equipment dedicated PDCCH includes indication information for indicating that the GC-PDCCH is not transmitted.

Optionally, the communication unit 1510 is further configured to: send second indication information to the terminal device, where the second indication information is used to indicate that S indicates the start position of the time domain resource used to transmit data and the time domain resource used to transmit DCI The number of symbols between.

The communication device 1500 may implement the steps or processes executed by the network device in the method 900 according to the embodiment of the present application. The communication device 1500 may include a unit for executing the method executed by the network device in the method 900 in FIG. 9 . In addition, each unit in the communication device 1500 and other operations and/or functions described above are used to implement the corresponding process of the method 900 in FIG. 9.

Wherein, when the communication device 1500 is used to execute the method 900 in FIG. 9, the communication unit 1510 can be used to execute steps 910 and 920 in the method 900, and the processing unit 1520 can be used to execute step 901 in the method 900.

It should also be understood that the communication unit in the communication device 1500 can be implemented by the transceiver 1810 in the network device 1800 shown in FIG. 17, and the processing unit 1520 in the communication device 1500 can be implemented by the network device shown in FIG. The processor 1820 in 1800 is implemented.

It should also be understood that the communication unit 1510 in the communication device 1500 may also be an input/output interface. Among them, the transceiver may include a transmitter and/or a receiver, which respectively implement the functions of the sending unit and the receiving unit.

FIG. 16 is another schematic block diagram of a communication device 1600 provided by an embodiment of the present application. As shown in the figure, the communication device 1600 includes a transceiver 1610, a processor 1620, and a memory 1630. The memory 1630 stores programs. The processor 1620 is used to execute the programs stored in the memory 1630 and execute the programs stored in the memory 1630. , So that the processor 1620 is used to execute the relevant processing steps in the above method embodiment, and executes the program stored in the memory 1630, so that the processor 1620 controls the transceiver 1610 to execute the transceiver related steps in the above method embodiment.

As an implementation, the communication device 1600 is used to execute the actions performed by the terminal device in the above method embodiment. At this time, the execution of the program stored in the memory 1630 enables the processor 1620 to execute the above method embodiment. The processing steps on the terminal device side in the middle, execute the program stored in the memory 1630, so that the processor 1620 controls the transceiver 1610 to perform the receiving and sending steps on the terminal device side in the above method embodiment.

As another implementation, the communication device 1600 is used to perform the actions performed by the network device in the above method embodiment. At this time, the execution of the program stored in the memory 1630 enables the processor 1620 to perform the above method implementation. In the example, the processing steps on the network device side execute the programs stored in the memory 1630 so that the processor 1620 controls the transceiver 1610 to perform the receiving and sending steps on the network device side in the above method embodiment.

The embodiment of the present application also provides a communication device 1700, and the communication device 1700 may be a terminal device or a chip. The communication device 1700 may be used to perform the actions performed by the terminal device in the foregoing method embodiments.

When the communication device 1700 is a terminal device, FIG. 17 shows a simplified schematic diagram of the structure of the terminal device. It is easy to understand and easy to illustrate. In FIG. 17, the terminal device uses a mobile phone as an example. As shown in Figure 17, the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of baseband signal and radio frequency signal and the processing of radio frequency signal. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of description, only one memory and processor are shown in FIG. 17. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

In the embodiments of the present application, the antenna and radio frequency circuit with the transceiver function can be regarded as the transceiver unit of the terminal device, and the processor with the processing function can be regarded as the processing unit of the terminal device.

As shown in FIG. 17, the terminal device includes a transceiver unit 1710 and a processing unit 1720. The transceiver unit 1710 may also be referred to as a transceiver, a transceiver, a transceiver, and so on. The processing unit 1720 may also be called a processor, a processing board, a processing module, a processing device, and the like. Optionally, the device for implementing the receiving function in the transceiver unit 1710 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1710 as the sending unit, that is, the transceiver unit 1710 includes a receiving unit and a sending unit. The transceiver unit may sometimes be called a transceiver, a transceiver, or a transceiver circuit. The receiving unit may sometimes be called a receiver, receiver, or receiving circuit. The transmitting unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit.

For example, in an implementation manner, the processing unit 1720 is configured to execute other processing steps on the terminal device side in the embodiment of the present application. The transceiving unit 1710 is used to perform steps 910 and 920 shown in FIG. 9, and/or the transceiving unit 1710 is also used to perform other transceiving steps on the terminal device side.

It should be understood that FIG. 17 is only an example and not a limitation, and the foregoing terminal device including a transceiver unit and a processing unit may not rely on the structure shown in FIG. 17.

When the communication device 1700 is a chip, the chip includes a transceiver unit and a processing unit. Wherein, the transceiver unit may be an input/output circuit or a communication interface; the processing unit may be a processor, microprocessor, or integrated circuit integrated on the chip.

The embodiment of the present application also provides a communication device 1800, which may be a network device or a chip. The communication device 1800 can be used to perform the actions performed by the network device in the foregoing method embodiments.

When the communication device 1800 is a network device, for example, it is a base station. Figure 18 shows a simplified schematic diagram of the base station structure. The base station includes 1810 part and 1820 part. The 1810 part is mainly used for receiving and sending radio frequency signals and the conversion between radio frequency signals and baseband signals; the 1820 part is mainly used for baseband processing and controlling the base station. The 1810 part can usually be called a transceiver unit, transceiver, transceiver circuit, or transceiver. The 1820 part is usually the control center of the base station, and can usually be referred to as a processing unit, which is used to control the base station to perform the processing operations on the network device side in the foregoing method embodiments.

The transceiver unit of part 1810 may also be called a transceiver or a transceiver, etc. It includes an antenna and a radio frequency unit, and the radio frequency unit is mainly used for radio frequency processing. Optionally, the device used for implementing the receiving function in part 1810 can be regarded as the receiving unit, and the device used for implementing the sending function can be regarded as the sending unit, that is, the part 1810 includes the receiving unit and the sending unit. The receiving unit may also be called a receiver, a receiver, or a receiving circuit, and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.

The 1820 part may include one or more single boards, and each single board may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control the base station. If there are multiple boards, the boards can be interconnected to enhance processing capabilities. As an optional implementation, multiple single boards may share one or more processors, or multiple single boards may share one or more memories, or multiple single boards may share one or more processing at the same time. Device.

For example, in an implementation manner, the transceiving unit of part 1810 is used to perform the sending operation on the network device side in step 910 and step 920 shown in FIG. 9, and/or the transceiving unit of part 1810 is also used to perform the present application Other transceiving steps on the network device side in the embodiment. The processing unit in part 1820 is used to perform the processing operation of step 901 in FIG. 9, and/or the processing unit in part 1820 is also used to perform the processing steps on the network device side in the embodiment of the present application.

It should be understood that FIG. 18 is only an example and not a limitation, and the foregoing network device including a transceiver unit and a processing unit may not rely on the structure shown in FIG. 18.

When the communication device 1800 is a chip, the chip includes a transceiver unit and a processing unit. Among them, the transceiver unit may be an input/output circuit or a communication interface; the processing unit is a processor or microprocessor or integrated circuit integrated on the chip.

In addition, the network equipment is not limited to the above forms, and may also be in other forms: for example: including BBU and adaptive radio unit (ARU), or BBU and active antenna unit (AAU); or Customer premises equipment (CPE) may also be in other forms, which is not limited by this application.

The above-mentioned BBU can be used to perform the actions described in the previous method embodiments implemented by the network device, and the RRU can be used to perform the actions described in the previous method embodiments that the network device sends to or receives from the terminal device. For details, please refer to the description in the previous method embodiment, which will not be repeated here.

The embodiment of the present application also provides a processing device, including a processor and an interface. The processor may be used to execute the method in the foregoing method embodiment.

It should be understood that the foregoing processing device may be a chip. For example, the processing device may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), or a system on chip (SoC), or It is a central processor unit (CPU), it can also be a network processor (NP), it can also be a digital signal processing circuit (digital signal processor, DSP), or it can be a microcontroller (microcontroller unit). , MCU), it can also be a programmable logic device (PLD) or other integrated chips.

In the implementation process, the steps of the above method can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware processor, or executed and completed by a combination of hardware and software modules in the processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware. To avoid repetition, it will not be described in detail here.

It should be noted that the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability. In the implementation process, the steps of the foregoing method embodiments can be completed by hardware integrated logic circuits in the processor or instructions in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components . The methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like. The steps of the method disclosed in combination with the embodiments of the present application can be directly embodied as being executed and completed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electronic Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) ) And direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that the memories of the systems and methods described herein are intended to include, but are not limited to, these and any other suitable types of memories.

According to the method provided in the embodiments of the present application, the present application also provides a computer program product. The computer program product includes: computer program code, which when the computer program code runs on a computer, causes the computer to execute the steps shown in FIGS. 9 to 15 The method of any one of the embodiments is shown.

According to the method provided in the embodiments of the present application, the present application also provides a computer-readable medium that stores a program code, and when the program code runs on a computer, the computer executes the steps shown in FIGS. 9 to 15 The method of any one of the embodiments is shown.

According to the method provided in the embodiments of the present application, the present application also provides a system, which includes the aforementioned one or more terminal devices and one or more network devices.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk (solid state disc, SSD)) etc.

The network equipment in the above device embodiments corresponds to the network equipment or terminal equipment in the terminal equipment and method embodiments, and the corresponding modules or units execute the corresponding steps. For example, the communication unit (transceiver) performs the receiving or sending in the method embodiments. In addition to sending and receiving, other steps can be executed by the processing unit (processor). For the functions of specific units, refer to the corresponding method embodiments. There may be one or more processors.

The terms "component", "module", "system", etc. used in this specification are used to denote computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, the component may be, but is not limited to, a process, a processor, an object, an executable file, an execution thread, a program, and/or a computer running on a processor. Through the illustration, both the application running on the computing device and the computing device can be components. One or more components may reside in processes and/or threads of execution, and components may be located on one computer and/or distributed between two or more computers. In addition, these components can be executed from various computer readable media having various data structures stored thereon. The component may be based on, for example, a signal having one or more data packets (such as data from two components interacting with another component in a local system, a distributed system, and/or a network, such as the Internet that interacts with other systems through signals) Communicate through local and/or remote processes.

A person of ordinary skill in the art may be aware that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, 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 displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of this application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for receiving data, characterized by comprising:

The terminal device receives downlink control information DCI, where the DCI is used to indicate a time domain resource indication, and the time domain resource indication includes a relative position between a time domain resource used to transmit data and a time domain resource used to transmit the DCI Information;

Based on the time domain resource indication, the terminal device receives the data.
The method according to claim 1, wherein the time domain resource indication is used to indicate S and L, and the S represents a time domain resource used to transmit the data and a time domain used to transmit the DCI The number of symbols between the starting positions of the resource, the L represents the length of the time domain resource used to transmit the data, and S and L are integers greater than or equal to zero.
The method according to claim 2, wherein the value of S is any one of the following: T, T+1, T+2;

Wherein, T represents the number of symbols occupied by the time domain resources used to transmit the DCI, and T is an integer greater than or equal to 1.
The method according to claim 1 or 2, wherein the method further comprises:

The terminal device obtains first indication information, where the first indication information is used to indicate frequency domain resource information used to transmit the data.
The method according to claim 4, wherein the first indication information is used to indicate any one of the following:

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the GC-PDCCH;

The frequency domain resources used to transmit the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH;

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the GC-PDCCH and the frequency domain resources occupied by the terminal equipment dedicated PDCCH;

The frequency domain resources used for transmitting the data are resources other than the frequency domain resources occupied by the GC-PDCCH, and the first indication information includes information about the frequency domain resources occupied by the GC-PDCCH; or,

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH, and the terminal equipment dedicated PDCCH includes indication information for indicating that the GC-PDCCH is not transmitted.
The method according to claim 2 or 3, wherein the method further comprises:

The terminal device receives second indication information, where the second indication information is used to indicate that S indicates that the time domain resource used to transmit the data is between the start position of the time domain resource used to transmit the DCI The number of symbols.
The method according to any one of claims 1 to 6, wherein the method further comprises:

The terminal device determines the location of the time-frequency resource for transmitting the data according to one or more of the following:

The time-frequency resource used to transmit the synchronization signal block, the time-frequency resource used to transmit the channel state information reference signal CSI-RS, the time-frequency resource used to transmit paging, or the demodulation reference used to demodulate the data The time-frequency resource of the signal DMRS.
A method for sending data, characterized in that it comprises:

The network equipment determines the time domain resource indication;

The network device sends the DCI to a terminal device, where the DCI includes information indicated by the time domain resource, and the time domain resource indication includes a time domain resource used to transmit data and a time domain used to transmit the DCI Information about the relative location between resources.
The method according to claim 8, wherein the time domain resource indication is used to indicate S and L, and the S represents a time domain resource used to transmit the data and a time domain used to transmit the DCI The number of symbols between the starting positions of the resource, the L represents the length of the time domain resource used to transmit the data, and S and L are integers greater than or equal to zero.
The method according to claim 9, wherein the value of S is any one of the following: T, T+1, T+2;

Wherein, T represents the number of symbols occupied by the time domain resources used to transmit the DCI, and T is an integer greater than or equal to 1.
The method according to claim 8 or 9, characterized in that:

The method also includes:

The network device sends first indication information to the terminal device, where the first indication information is used to indicate frequency domain resource information used to transmit the data.
The method according to claim 11, wherein the first indication information is used to indicate any one of the following:

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the GC-PDCCH;

The frequency domain resources used to transmit the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH;

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the GC-PDCCH and the frequency domain resources occupied by the terminal equipment dedicated PDCCH;

The frequency domain resources used for transmitting the data are resources other than the frequency domain resources occupied by the GC-PDCCH, and the first indication information includes information about the frequency domain resources occupied by the GC-PDCCH; or,

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH, and the terminal equipment dedicated PDCCH includes indication information for indicating that the GC-PDCCH is not transmitted.
The method according to claim 9 or 10, wherein the method further comprises:

The network device sends second indication information to the terminal device, where the second indication information is used to indicate that the S indicates the time domain resource used to transmit the data and the time domain resource used to transmit the DCI The number of symbols between the starting positions.
A communication device, characterized by comprising: a processing unit and a communication unit,

The communication unit is configured to receive downlink control information DCI, where the DCI is used to indicate a time domain resource indication, and the time domain resource indication includes a time domain resource for transmitting data and a time domain resource for transmitting the DCI The relative position information between;

The processing unit is used to determine the time domain resource indication;

The communication unit is further configured to: receive the data based on the time domain resource indication.
The apparatus according to claim 14, wherein the time domain resource indication is used to indicate S and L, and the S represents a time domain resource used to transmit the data and a time domain used to transmit the DCI The number of symbols between the starting positions of the resource, the L represents the length of the time domain resource used to transmit the data, and S and L are integers greater than or equal to zero.
The device according to claim 15, wherein the value of S is any one of the following: T, T+1, T+2;

Wherein, T represents the number of symbols occupied by the time domain resources used to transmit the DCI, and T is an integer greater than or equal to 1.
The device according to claim 14 or 15, characterized in that:

The communication unit is further configured to obtain first indication information, where the first indication information is used to indicate frequency domain resource information used to transmit the data.
The apparatus according to claim 17, wherein the first indication information is used to indicate any one of the following:

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the GC-PDCCH;

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the dedicated PDCCH of the communication device;

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the GC-PDCCH and the frequency domain resources occupied by the dedicated PDCCH of the communication device;

The frequency domain resources used for transmitting the data are resources other than the frequency domain resources occupied by the GC-PDCCH, and the first indication information includes information about the frequency domain resources occupied by the GC-PDCCH; or,

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the communication device dedicated PDCCH, and the communication device dedicated PDCCH includes indication information for indicating that the GC-PDCCH is not transmitted.
The device according to claim 15 or 16, characterized in that:

The communication unit is further configured to receive second indication information, where the second indication information is used to indicate that the S indicates the difference between the time domain resource used to transmit the data and the time domain resource used to transmit the DCI. The number of symbols between the start positions.
The device according to any one of claims 14 to 19, wherein the processing unit is further configured to:

Determine the location of the time-frequency resource used to transmit the data according to one or more of the following:

Time-frequency resources used to transmit synchronization signal blocks, time-frequency resources used to transmit channel state information reference signals CSI-RS, time-frequency resources used to transmit paging, and demodulation reference signals used to demodulate the data Time-frequency resources of DMRS.
A communication device, characterized by comprising: a processing unit and a communication unit,

The processing unit is used to determine a time domain resource indication and a time domain resource indication;

The communication unit is configured to send the DCI to a terminal device, where the DCI includes information indicated by the time domain resource, and the time domain resource indication includes a time domain resource used to transmit data and a time domain resource used to transmit the DCI. The relative position information between the time domain resources.
The apparatus according to claim 21, wherein the time domain resource indication is used to indicate S and L, and the S represents a time domain resource used to transmit the data and a time domain used to transmit the DCI The number of symbols between the starting positions of the resource, the L represents the length of the time domain resource used to transmit the data, and S and L are integers greater than or equal to zero.
The device according to claim 22, wherein the value of S is any one of the following: T, T+1, T+2;

Wherein, T represents the number of symbols occupied by the time domain resources used to transmit the DCI, and T is an integer greater than or equal to 1.
The device according to claim 21 or 22, wherein:

The communication unit is further configured to send first indication information to the terminal device, where the first indication information is used to indicate frequency domain resource information used to transmit the data.
The device according to claim 24, wherein the first indication information is used to indicate any one of the following:

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the GC-PDCCH;

The frequency domain resources used to transmit the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH;

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the GC-PDCCH and the frequency domain resources occupied by the terminal equipment dedicated PDCCH;

The frequency domain resources used for transmitting the data are resources other than the frequency domain resources occupied by the GC-PDCCH, and the first indication information includes information about the frequency domain resources occupied by the GC-PDCCH; or,

The frequency domain resources used for transmitting the data do not overlap with the frequency domain resources occupied by the terminal equipment dedicated PDCCH, and the terminal equipment dedicated PDCCH includes indication information for indicating that the GC-PDCCH is not transmitted.
The device according to any one of claims 21 to 25, wherein the communication unit is further configured to:

Send second indication information to the terminal device, where the second indication information is used to indicate that S indicates the start position of the time domain resource used to transmit the data and the time domain resource used to transmit the DCI The number of symbols between.
A communication device, characterized by comprising:

The processor is configured to be coupled with the memory and execute the instructions in the memory to implement the method according to any one of claims 1 to 13.
A communication system, characterized by comprising: the communication device according to any one of claims 14 to 20, and/or the communication device according to any one of claims 21 to 26.
A computer-readable storage medium, characterized by comprising a computer program, which when the computer program runs on a computer, causes the computer to execute the method according to any one of claims 1 to 13.
A computer program product, characterized by comprising a computer program, when the computer program is run on a computer, the computer is caused to execute the method according to any one of claims 1 to 13.
A chip, characterized in that it comprises:

Memory, used to store computer programs;

The processor is configured to call and run the computer program from the memory, so that the communication device installed with the chip system executes the method according to any one of claims 1 to 13.