CN109981227A - Based on a group HARQ transmission method and control system for communication in scenes of internet of things - Google Patents

Abstract

The invention discloses a HARQ transmission method and control system based on group communication in the Internet of Things scenario, and belongs to the technical field of communication. In a specific radio resource, at the second time point, monitor the group HARQ indication channel sent by the base station; decode the monitored group HARQ indication channel; according to the fourth rule, determine the group HARQ indication information from the decoded group HARQ indication channel . Decode the data from the network access point, obtain a group ID of an IoT logical group, and determine to become a group coordination terminal, wherein the IoT logical group is determined by the network access point according to the second rule; according to the third rule The data of the IoT terminal in the group is sent at the first time point. Compared with the prior art, the present invention addresses the communication requirements of large-scale IoT devices, especially in weak and blind areas, provides resource efficiency of wireless communication systems, and reduces power consumption of IoT devices.

Description

HARQ transmission method and control system based on group communication in IoT scenario

technical field

The invention relates to the field of communication technologies, and in particular to a HARQ transmission method and control system based on group communication in an Internet of Things scenario. The control system mainly involves a terminal, a base station and a baseband chip.

Background technique

LTE (Long Term Evolution, Long Term Evolution)/LTE-A (Long Term Evolution-Advanced, Enhanced Long Term Evolution), 5G (Fifth Generation) and MultiFire technologies are wireless access technologies in licensed and unlicensed frequency bands, providing high Wireless data services such as data rate and low latency, including data transmission in the Internet of Things (Internet of Things, IoT, also known as machine-type communication) scenarios. One of the characteristics of the IoT scenario is the huge number of IoT terminals. When a large-scale data-level IoT terminal initiates a data request, it will bring enormous pressure to the network. Therefore, it is a challenge for the network to effectively support data concurrency of a huge order of magnitude. In some IoT scenarios, because the IoT terminal is in a weak coverage area or a blind area, the signal quality is poor, and repeated transmission is required to improve the signal strength. Therefore, in the coverage blind area or weak area, when the number of IoT terminals is large, the resource consumption of the network is very huge.

In the related art, the communication quality of a communication terminal of a huge order of magnitude is not optimized, especially in weak coverage areas and blind areas. One of the scenarios of 5G system is to support massive Machine Type Communication (mMTC), and there is no mature solution yet. Therefore, the present invention designs a HARQ (Hybrid Automatic Repeat request, hybrid automatic repeat request) transmission method and control system for a transmission mechanism based on group communication in an Internet of Things scenario.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a HARQ transmission method and control system based on group communication in the Internet of Things scenario. The HARQ indicates information transmission and data retransmission.

In order to achieve the above object, the technical solution adopted in the present invention is a HARQ transmission method and control system based on group communication in the Internet of Things scenario, and the device that provides wireless data services for Internet of Things terminals is called a network access point. It can be a base station of a cell, or a wifi access device. The wireless communication technology in the Internet of Things scenario in the present invention is based on NB-IoT (Narrow Band-Internet of Things), or the Internet of Things communication technology based on eMTC (enhanced Machine Type Communication, enhanced machine type communication) or An extended version, or the 5G standard, or MultiFire's unlicensed band IoT communication technology. The IoT terminal in the present invention is based on the 5G standard, or the unlicensed frequency band IoT communication technology of MultiFire, or is NB-IoT, or is a terminal node of eMTC.

The present invention provides a HARQ transmission method based on group communication in the Internet of Things scenario, which is used for data retransmission in the Internet of Things communication. In the above invention, the method includes:

Step 1: in a specific radio resource, at a second time point, monitor the group HARQ indication channel sent by the base station;

Step 2: Decode the monitored group HARQ indication channel;

Step 3: According to the fourth rule, determine the group HARQ indication information from the decoded group HARQ indication channel.

In the above invention, before step 1, that is, before the step of monitoring the group HARQ indication channel sent by the base station, the method further includes:

Step A: Decode the data from the network access point, obtain a group ID of an IoT logical group, and determine to become a group coordination terminal, wherein the IoT logical group is determined by the network access point according to the second rule;

Step B: Send the data of the IoT terminals in the group at the first time point according to the third rule.

In step A of the present invention, the second rule is defined that the network access point forms an IoT logical group according to a specific group size within a certain geographical area. Further, the IoT logical group is assigned a group ID. The network access point sends the group ID to the group coordination terminal, and the group coordination terminal is determined by the network access point. The data transmission and reception of each IoT terminal in the group is performed through the group of coordination terminals, and further, each IoT terminal is assigned an ID in the group. Further, the group coordinating terminal has a mapping table between the physical ID of the terminal in the group and the ID in the group. In the above-mentioned group-based transmission mechanism, in one embodiment, the actual or physical terminals included in an IoT logical group are variable. In one embodiment, the actual or physical terminals included in an IoT logical group are fixed after the logical group is formed.

The group size of the above-mentioned one IoT logical group is defined as the number of IoT terminals that can be accommodated in one group, which is expressed as N _UE . In one embodiment, the number of physical or actual IoT terminals contained in a group is always equal to the number of N _UEs . In another embodiment, the number of physical or actual IoT terminals contained in a group may be less than N _UE .

In the present invention, in one embodiment, the group ID of the IoT terminal in an IoT logical group is determined by the network access point, and the physical ID of the IoT terminal in the IoT logical group and the group ID are mapped The table is distributed to the group coordination terminal of each group. Further, in an example, the intra-group ID of the IoT terminal in an IoT logical group is the C-RNTI (cell-Radio Network Temporary Identity) allocated by the network access point. In the second example, the intra-group ID of IoT terminals within an IoT logical group is the intra-group index given by the network access point. In another embodiment, the intra-group ID of the IoT terminal in an IoT logical group is determined by the group coordinating terminal, and the mapping table between the physical ID and the intra-group ID of the IoT terminal in the IoT logical group is updated and reported. In one example, the intra-group ID of the IoT terminal in an IoT logical group is the intra-group index given by the group coordinating terminal.

In the present invention, the group IDs of the IoT terminals in one IoT logical group are fixed. In the second embodiment, the group IDs of the IoT terminals in one IoT logical group are changed. In one embodiment, the physical ID of the IoT terminal in one IoT logical group is IMSI (International Mobile Subscriber Identification Number).

In step B of the present invention, the first time point represents the time when the data is sent for the first time. In step B of the above invention, the group coordinating terminal sends data of all IoT terminals in the group according to a third rule, and the third sending rule is defined as each IoT terminal in the group sending data to each group of coordinating terminals , each group of coordinating terminals combines the data in the group into a data packet and sends it to the network access point at the first point in time. The content of a data packet includes the data packet sequence number, group ID, the group ID of the IoT terminal, the Terminal data, the size of a packet. The size of the one data packet represents the number of IoT terminals in the group corresponding to the one data packet, and is denoted as K. The value of K can be 1, that is, the group coordination terminal sends the data of each IoT terminal in the group to the network access point one by one. In one embodiment, different groups have different K. In the second embodiment, the values of K for different groups are the same.

In one embodiment, the value range of K is specified by the protocol, and the K of each group is determined by the network access point. When forming an IoT logical group, the network access point sends it to each group for coordination through high-level signaling. terminal. Further, when the scale of an IoT logical group changes, the value of K is updated. In the second embodiment, the value of K is dynamically changed, determined by the group coordinating terminal, and reported to the network every time a data packet is sent. In the third embodiment, the value range of K is specified by the protocol, and the group coordination terminal selects from it and reports it to the network.

In the present invention, optionally, when the third rule combines the IoT data in the group into a data packet, it is specifically: the group coordination terminal adds CRC (Cyclic Redundancy Check) to the data of the K IoT terminals in the group respectively. , Cyclic Redundancy Check) bits, and then arrange the multiple data in sequence, and then encode and send.

In the present invention, optionally, when the third rule combines the IoT data in the group into a data packet, specifically: the group coordination terminal concatenates the data of the K IoT terminals in the group in order, and adds the CRC bits, and then encoded and sent.

In step 3 of the present invention, the group HARQ indication information is carried in the group HARQ indication channel in step 2 to feed back ACK (Acknowledgement, positive)/NACK (Negative Acknowledgement), and the group HARQ indication information is the network The access point sends it to the group coordination terminal, and other terminals in each IoT logical group do not monitor or decode the group HARQ indication channel. The group coordination terminal sends data at the first time point, judges the second time point according to a predefined rule, and starts monitoring the group HARQ indication channel at the second time point.

In one embodiment of the present invention, one group HARQ indication channel carries one group HARQ indication information. In another embodiment of the present invention, one group HARQ indication channel carries multiple HARQ indication information. In an embodiment of the present invention, the ACK/NACK carried by the HARQ indication information of a group corresponds to an IoT terminal in an IoT logical group. In another embodiment, the ACK/NACK carried by one HARQ indication information corresponds to multiple IoT logical groups.

In one embodiment of the present invention, all IoT logical groups within a network access point share one group HARQ indicator channel, that is, the group HARQ indicator channel is a broadcast channel. Further, the group of HARQ indication channels occupy a common radio resource for transmission. In another embodiment, within one network access point, one IoT logical group corresponds to one HARQ indicator channel, that is, the group HARQ indicator channel is a multicast channel. Optionally, the radio resource occupied by the HARQ indication channel of the one group is determined based on a function of the group ID. Optionally, the radio resources occupied by the one group HARQ indication channel are allocated by the network access point. Further, a network access point may transmit one or more group HARQ indication channels at the same time, and the one or more group HARQ indication channels occupy one or more blocks of radio resources.

In step 3 of the present invention, the fourth rule is the specification of the content and format contained in a group of HARQ indication information. In the present invention, the content contained in a group of HARQ indication information includes one or more NACK indication information, a One or more of ACK indication information, one or more ACK/NACK indication information, one or more terminal indexes, one or more group IDs, and one or more process indexes of data packets. Wherein, in one embodiment, the above-mentioned terminal index is the intra-group ID of the IoT terminal in an IoT logical group, and in another embodiment, the above-mentioned terminal index is the Internet of Things contained in a data packet sent by the group coordination terminal. The sequence index of the terminal data in the one data packet corresponds to each IoT terminal in the one data packet. Among them, the NACK indication information is 1 bit. For example, NACK is represented by 1, which means that the data is received incorrectly. The network access point only sends NACK when the data is received incorrectly, and the network access point does not send feedback when the data is received correctly; the ACK indication information is 1 Bit, such as ACK is represented by 0, indicating that the data is received correctly, the network access point only sends ACK when the data is received correctly, and the network access point does not send feedback when the data is received incorrectly; the ACK/NACK indication information is 1 bit, indicating that the data is received. True/False, the network access point sends an ACK/NACK after the data has been received.

In the present invention, optionally, the fourth rule is that a group HARQ indication information is a plurality of IoT terminals corresponding to a data packet sent by a group coordination terminal, and the group HARQ indication information includes one or more NACK indication information and one or more terminal indices, no ACK. The one or more NACK indication information indicates that the IoT terminal data corresponding to the one or more terminal indexes in the one data packet is received incorrectly. Optionally, the group of HARQ indication information includes a group ID.

In the present invention, optionally, the fourth rule is that a group HARQ indication information is a plurality of IoT terminals corresponding to a data packet sent by a group coordination terminal, and the group HARQ indication information includes one or more Terminal index. In one example, the one or more terminal indices correspond to data reception errors of one or more IoT terminals in a data packet. Correspondingly, if the terminal index is not included in the HARQ indication information of a group, the group coordinating terminal can judge that the corresponding IoT terminal data is received correctly. Optionally, the group of HARQ indication information includes a group ID. In the second example, the one or more terminal indexes corresponding to one or more IoT terminals in a data packet receive data correctly. Correspondingly, if the terminal index is not included in a group HARQ indication information, the group coordinating terminal can judge that the corresponding IoT terminal has received data incorrectly. Optionally, the group of HARQ indication information includes a group ID.

In the present invention, optionally, the fourth rule is that a group HARQ indication information is a plurality of IoT terminals corresponding to a data packet sent by a group coordination terminal, and the group HARQ indication information includes one or more ACK indication information and one or more intra-group IDs, no NACK. The one or more ACK indication information indicates that the IoT terminal data corresponding to the one or more terminal indexes in the one data packet is received correctly. Optionally, the group of HARQ indication information includes a group ID.

In the present invention, optionally, the fourth rule is that a group HARQ indication information is a plurality of IoT terminals corresponding to a data packet sent by a group coordinating terminal, and the group HARQ indication information includes multiple ACK/ NACK indication information. Further, the multiple values are K. Optionally, the group of HARQ indication information includes a group ID.

In the present invention, optionally, the fourth rule is that a group HARQ indication information is a plurality of IoT terminals corresponding to a data packet sent by a group coordinating terminal, and the group HARQ indication information includes multiple ACK/ NACK indication information, and multiple terminal indices. Further, the multiple values are K. Optionally, the group of HARQ indication information includes a group ID.

In the present invention, optionally, the fourth rule is that a group HARQ indication information corresponds to a data packet sent by a group coordination terminal, and the group HARQ indication information includes a NACK indication information. Wherein, the NACK indication information corresponds to a data packet reception error. When the group coordination terminal does not monitor the group HARQ indication channel, it is judged that the corresponding data packet is received correctly. Optionally, the fourth rule is that a group HARQ indication information further includes a group ID.

In the present invention, optionally, the fourth rule is that a group HARQ indication information corresponds to a data packet sent by a group coordination terminal, and the group HARQ indication information includes an ACK indication information. The one ACK indication information corresponds to one data packet received correctly. When the group coordination terminal does not monitor the group HARQ indication channel, it determines that the corresponding data packet is received incorrectly. Optionally, the fourth rule is that a group HARQ indication information further includes a group ID.

In the present invention, optionally, the fourth rule is that one group HARQ indication information corresponds to multiple data packets sent by multiple group coordination terminals, and the one group HARQ indication information includes one or more group IDs, and a or multiple ACK indications. The one or more group IDs correspond to one or more IoT logical groups, and the one or more ACKs indicate that one or more data packets sent corresponding to the one or more IoT logical groups are received correctly.

In the present invention, optionally, the fourth rule is that one group HARQ indication information corresponds to multiple data packets sent by multiple group coordination terminals, and the one group HARQ indication information includes one or more group IDs, and a or multiple NACK indications. Wherein, the one or more group IDs correspond to one or more IoT logical groups, and one or more NACKs indicate that one or more data packets sent by the one or more IoT logical groups are received incorrectly.

In the present invention, optionally, the fourth rule is that one group HARQ indication information corresponds to multiple data packets sent by multiple group coordination terminals, and the one group HARQ indication information includes one or more group IDs. The one or more group IDs correspond to one or more IoT logical groups. In one example, the one or more group IDs represent one or more packet reception errors sent by the one or more IoT logical groups. In another example, the one or more group IDs indicate that one or more data packets sent by the one or more IoT logical groups are received correctly.

In the present invention, optionally, the fourth rule is that one group HARQ indication information corresponds to a plurality of data packets sent by a group coordinating terminal, and the one group HARQ indication information contains no more than the plurality of data packet process indexes . The process index of the data packets not larger than the plurality indicates that the corresponding data packets are received correctly.

In the present invention, optionally, the fourth rule is that a group HARQ indication information corresponds to a plurality of data packets sent by a group coordinating terminal, and the group HARQ indication information includes a process index and multiple data packets of the plurality of data packets. ACK/NACK indication information.

In the present invention, optionally, determining the group HARQ indication information from the decoded group HARQ indication channel according to the fourth rule, the specific steps include: according to the fourth rule, if the group HARQ indication channel is not monitored, then determine The data packet is received correctly; if the group HARQ indication channel is monitored, the group HARQ indication channel is decoded, the obtained group HARQ indication information is determined to be NACK, and the first time point is determined according to the second time point, and the corresponding original data packet is resent.

In the present invention, optionally, determining the group HARQ indication information from the decoded group HARQ indication channel according to the fourth rule, the specific steps include: according to the fourth rule, if the group HARQ indication channel is not monitored, then determine Data packet reception error; if the group HARQ indication channel is monitored, it is determined that the obtained group HARQ indication information is ACK, the first time point is determined according to the second time point, and the original data packets corresponding to other first time points are resent.

In the present invention, optionally, determining the group HARQ indication information from the decoded group HARQ indication channel according to the fourth rule, the specific method includes: according to the fourth rule, if the group HARQ indication channel is not monitored, then determine The data packet is received correctly; if the group HARQ indication channel is monitored, the group HARQ indication channel is decoded, the obtained group HARQ indication information is determined to be NACK and the group ID, and the data of the IoT terminal corresponding to the group ID is resent.

In the present invention, optionally, determining the group HARQ indication information from the decoded group HARQ indication channel according to the fourth rule, the specific method includes: according to the fourth rule, if the group HARQ indication channel is not monitored, then determine The data packet is received incorrectly; if the group HARQ indication channel is monitored, it is determined that the obtained group HARQ indication information is ACK and the group ID, and the data of the remaining IoT terminals in the group except the obtained group ID are resent.

In the present invention, optionally, determining the group HARQ indication information from the decoded group HARQ indication channel according to the fourth rule, the specific method includes: according to the fourth rule, determining that the obtained group HARQ indication information is ACK/NACK Indication information and intra-group ID, resend the data of the IoT terminal corresponding to the intra-group ID whose ACK/NACK indication information is NACK.

It is determined that the group HARQ indication information is NACK, and the data is retransmitted according to the first rule. In an embodiment of the present invention, the first rule is that the group coordination terminal resends the original data packet formed according to the third rule. In the second embodiment of the present invention, the group coordinating terminal retransmits the data of the IoT terminals in the group that were not received correctly in sequence, and only sends the data of one IoT terminal at a time, including the group ID, the intra-group ID and the corresponding data. In a third embodiment, the group coordinating terminal combines the incorrectly received data of the IoT terminals in the group according to the third rule, and resends it.

The present invention provides a HARQ transmission control system based on group communication in an Internet of Things scenario. The control system includes a terminal for completing Internet of Things services of the terminal and group HARQ transmission and control, including: a radio frequency transceiver module, a processor , a memory and a HARQ functional module; the radio frequency transceiver module is used to receive wireless signals from the base station, send them to the processor for signal processing, and send signals from the processor; an instruction executed by the processor; the processor is used to call the instruction stored in the memory, and the processor and the group of HARQ function modules exchange information; the group of HARQ function modules includes a group HARQ monitor sub-module module, a group HARQ decoding submodule, and a group HARQ management submodule, the group HARQ monitoring submodule is used to monitor whether there is a group HARQ indication channel in the wireless signal received by the radio frequency module, and the group HARQ decoding submodule is used for Decoding the group HARQ indication channel confirmed by the group HARQ monitoring sub-module to obtain group HARQ indication information, and the group HARQ management sub-module controls subsequent HARQ transmission according to the decoded group HARQ indication information.

The present invention provides a HARQ transmission control system based on group communication in the Internet of Things scenario. The control system includes a base station for controlling service transmission and HARQ transmission and control based on group communication in the Internet of Things scenario, including: radio frequency A transceiver module, a processor, a memory and a HARQ function module, the radio frequency transceiver module is used to receive wireless signals from a terminal, send them to the processor for signal processing, and send signals from the processor; the memory Instructions that can be executed by the processor are stored in the processor; the processor is used to call the instructions stored in the memory, and the processor exchanges information with the group of HARQ function modules; the group of HARQ function modules It includes a group HARQ encoding submodule and a group HARQ management submodule, the group HARQ encoding submodule obtains the data decoding result from the IoT terminal based on the processor, generates group HARQ indication information, and generates a group HARQ indication channel. The HARQ management sub-module manages the HARQ transmission of each IoT terminal according to the group HARQ indication information generated by the group HARQ encoding sub-module.

The present invention provides a HARQ transmission control system based on group communication in an Internet of Things scenario, the control system includes a baseband chip for a terminal, including: a processor; The instruction executed by the processor, and the processor is used to call the instruction stored in the memory, and perform the following operations: obtain the group HARQ indication channel issued by the base station; according to the decoded group HARQ indication information, resend the data according to the first rule .

The present invention provides a HARQ transmission control system based on group communication in an Internet of Things scenario, the control system includes a baseband chip for a base station, including: a processor; The instruction executed by the processor, and the processor is used to call the instruction stored in the memory to perform the following operations: define an IoT logical group; receive data from the IoT logical group; generate HARQ according to the data decoding result and according to the fourth rule Indication information, send the HARQ indication channel.

Compared with the prior art, the present invention provides a communication-based HARQ transmission method and control system for the communication requirements of large-scale Internet of Things devices, especially in the coverage of weak areas and blind areas, and provides the resource efficiency of the wireless communication system. , reducing the power consumption of IoT devices.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 shows a schematic diagram of a wireless communication system for providing Internet of Things service data transmission according to an embodiment of the present invention;

FIG. 2 shows group HARQ indication information of an embodiment of the present invention;

FIG. 3 shows group HARQ indication information of another embodiment of the present invention;

Fig. 4 shows the group HARQ indication information of the third embodiment of the present invention;

Fig. 5 shows the group HARQ indication information of the fourth embodiment of the present invention;

Fig. 6 shows the group HARQ indication information of the fifth embodiment of the present invention;

Figure 7 shows a third rule of an embodiment of the present invention;

Figure 8 shows a third rule of another embodiment of the present invention;

FIG. 9 shows a flowchart of determining group HARQ indication information according to an embodiment of the present invention;

FIG. 10 shows a flowchart of determining group HARQ indication information according to another embodiment of the present invention.

Detailed ways

In order to better understand the technical solutions of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

It should be understood that the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a," "the," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

Example 1

FIG. 1 shows a schematic diagram of a wireless communication system for providing Internet of Things service data transmission according to an embodiment of the present invention.

As shown in FIG. 1 , the wireless communication network 100 is an OFDM/OFDMA-based system, including a base station 101 and a plurality of communication terminals 121 , 122 , 123 and 124 . The service area of the base station 101 is 110. Within this range, the communication terminal 124 is a non-IoT terminal, and 121-123 are IoT terminals. The IoT terminals 121 to 123 belong to an IoT logical group 120, wherein 121 is the group coordination terminal of the logical group, and the data transmission and group HARQ indication information of all services in the logical group 120 pass through the uplink 131 between 121 and 101 and downlink 130 is performed as well. There are also uplink and downlink links between the IoT terminals 122/123 and the base station 101, which are respectively 141 and 142, which are mainly used for 122/123 to connect to the network. Communication links 162 and 163 exist between IoT terminals 122/123 and 121.

According to the embodiment of the present invention, FIG. 1 also shows the module structure of the base station 101 . The base station 101 has an antenna module 170 for receiving and transmitting signals. A radio frequency transceiver module 173, connected to the antenna module 170, is used to obtain signals from the antenna module 170, convert them into baseband signals, and transmit them to the processing module 174. The 173 can also convert the baseband signals from the 174 into radio frequency signals, and pass the antenna module 170 sent out. The processing module 174 processes the baseband signal, and calls other modules of the base station 101 to perform other processing according to the function of the signal. The storage module 175 stores data.

The base station 101 further includes a group HARQ function module 192 , including a group HARQ coding sub-module 171 and a group HARQ processing sub-module 172 . According to the decoding result of the received IoT data, the group HARQ encoding sub-module 171 generates ACK or NACK information and performs encoding. The group HARQ processing sub-module 172 generates a group HARQ channel based on the information generated by the sub-module 171, and sends it to the group coordination terminal of the IoT logical group.

According to an embodiment of the present invention, FIG. 1 also shows a module structure of a group coordination terminal 121 of an IoT logical group. The group coordination terminal 121 has an antenna module 150 for receiving and transmitting signals. A radio frequency transceiver module 151, connected to the antenna module 150, is used to obtain signals from the antenna module 150, convert them into baseband signals, and transmit them to the processing module 152. The 151 can also convert the baseband signals from the 152 into radio frequency signals, and pass the antenna module 150 sent out. The processing module 152 processes the baseband signal, and calls other modules of 121 to perform other processing according to the action of the signal. The storage module 153 stores data.

The group coordination terminal 121 further includes a group HARQ function module 191 , including a group HARQ decoding submodule 154 , a group HARQ monitoring submodule 155 , and a group HARQ processing submodule 156 . The group HARQ monitoring sub-module 155 is used for detecting the group HARQ channel, and the group HARQ decoding sub-module 154 is used for decoding the group HARQ channel received from the base station. The group HARQ processing sub-module 156 obtains the decoded group HARQ indication information and processes the group HARQ indication information.

Embodiment 2

FIG. 2 shows group HARQ indication information according to an embodiment of the present invention.

As shown in FIG. 2 , one group HARQ indication information 200 includes multiple intra-group IDs 210 to 212 and multiple NACK indication information 230 to 232 , corresponding to one data packet of one IoT logical group. 210 to 212 correspond to IoT terminals in multiple IoT logical groups, and their group IDs are respectively n ₁ , n ₂ , and n _k , and 230 is 1-bit NACK indication information, indicating that the terminal 210 receives data incorrectly. Similarly, 231 and 232 are both 1-bit NACK indication information, indicating that the terminals 211 and 212 receive data errors. Based on the decoded group HARQ indication information, the group coordinating terminal determines the corresponding

Embodiment 3

FIG. 3 shows group HARQ indication information of another embodiment of the present invention.

As shown in FIG. 3 , a group HARQ indication information 300 includes multiple intra-group IDs 310-312, 310-312 correspond to IoT terminals in multiple IoT logical groups, and their intra-group IDs are n ₁ , n ₂ , and n _{k respectively} . The group coordinating terminal judges that the data received by the corresponding IoT terminal in the group is incorrect by decoding the intra-group ID, or judges that the data received by the corresponding IoT terminal in the group is correct.

Embodiment 4

FIG. 4 shows group HARQ indication information of the third embodiment of the present invention.

As shown in FIG. 4, a group HARQ indication information 400 includes multiple intra-group IDs 410-412 and multiple ACK indication information 430-432. 410-412 correspond to IoT terminals in multiple IoT logical groups, and their intra-group IDs are respectively are n ₁ , n ₂ , n _k , and 430 is 1-bit ACK indication information, indicating that the terminal 410 receives the data correctly. Similarly, 431 and 432 are both 1-bit ACK indication information, indicating that the terminals 411 and 412 receive data errors.

Embodiment 5

FIG. 5 shows group HARQ indication information of the fourth embodiment of the present invention.

As shown in FIG. 5 , a group of HARQ indication information 500 includes a plurality of intra-packet indices 510 to 512 , and the plurality of data packet indices correspond to the sequential indices of IoT terminals in a data packet, indicating that the multiple indices correspond to the IoT terminals. The data received by the terminal is correct.

Embodiment 6

FIG. 6 shows group HARQ indication information of the fifth embodiment of the present invention.

As shown in FIG. 6 , one group HARQ indication information 600 includes multiple intra-group IDs 610 to 612 , and the multiple group IDs correspond to the reception errors of multiple data packets sent by the multiple groups.

Embodiment 7

FIG. 7 shows the third rule of one embodiment of the present invention.

As shown in FIG. 7 , the data packet 700 sent by the group coordinating terminal contains multiple intra-group IDs 710, 711, and 712. The data of the intra-group IDs 710, 711, and 712 are the CRCs of 730, 731, and 732, and 730, 731, and 732 respectively. The bits are 750, 751 and 752 respectively. The group coordinating terminal concatenates the data of each terminal together according to the order of the ID, data, and CRC bits in the group to form a data packet 700 .

Embodiment 8

Figure 8 shows a third rule of one embodiment of the present invention.

As shown in FIG. 8 , the data packet 800 sent by the group coordinating terminal includes data 810 , 811 , and 812 of multiple IoT terminals in the group, and the multiple data are concatenated together to generate CRC bits 850 .

Embodiment 9

FIG. 9 shows a flowchart of determining group HARQ indication information according to an embodiment of the present invention.

As shown in FIG. 9 , the method for determining group HARQ indication information according to an embodiment of Unrestrained includes:

Step 910, monitor the group HARQ indication channel from the network access point.

Step 911, determine whether the group HARQ indication channel is monitored.

Step 912, when the determination result of step 911 is yes, the decoding monitors the group HARQ indication channel.

Step 913, obtain the index in the data packet.

Step 914, it is determined that the data of the IoT terminal in the group corresponding to the index in the data packet is incorrectly received.

Step 916, it is determined that other terminals except the index in a data packet are correctly received.

Step 915, when the determination result of step 911 is no, that is, the group HARQ indication channel is not monitored, it is determined that all IoT terminal data in a data packet is correctly received.

Embodiment ten

FIG. 10 shows a flowchart of determining group HARQ indication information according to another embodiment of the present invention.

As shown in FIG. 10 , a method for determining group HARQ indication information according to an embodiment of Bingfang includes:

Step 1010, monitor the group HARQ indication channel from the network access point.

Step 1011, judging whether the group HARQ indication channel is monitored.

Step 1012, when the judgment result in step 1011 is yes, the decoding monitors the group HARQ indication channel.

Step 1013, obtain the index in the data packet.

Step 1014, it is determined that the data of the IoT terminal in the group corresponding to the index in the data packet is correctly received.

In step 1016, it is determined that other terminals except the index in a data packet are received in error.

Step 1015, when the determination result in step 1011 is no, that is, the group HARQ indication channel is not monitored, and it is determined that all IoT terminal data in a data packet is received by mistake.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

It should be understood that although the terms first, second, etc. may be used to describe time points in the embodiments of the present invention, these time points should not be limited to these terms. These terms are only used to distinguish points in time from one another. For example, without departing from the scope of the embodiments of the present invention, the first point in time may also be referred to as the second point in time, and similarly, the second point in time may also be referred to as the first point in time.

Depending on the context, the word "if" as used herein can be interpreted as "at" or "when" or "in response to determining" or "in response to detecting." Similarly, the phrases "if determined" or "if detected (the stated condition or event)" can be interpreted as "when determined" or "in response to determining" or "when detected (the stated condition or event)," depending on the context )" or "in response to detection (a stated condition or event)".

It should be noted that the terminals involved in the embodiments of the present invention may include, but are not limited to, a personal computer (Personal Computer, PC), a personal digital assistant (Personal Digital Assistant, PDA), a wireless handheld device, a tablet computer (Tablet Computer), Mobile phones, MP3 players, MP4 players, etc.

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

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

The above-mentioned integrated units implemented in the form of software functional units can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, and includes several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (Processor) to execute the methods described in the various embodiments of the present invention. some steps. The aforementioned storage medium includes: 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 codes .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (10)

1. based on a group HARQ transmission method for communication in scenes of internet of things, it is characterised in that: HARQ transmission method includes following step Suddenly,

Step 1: in one piece of particular radio resource, at the second time point, monitoring the group HARQ that base station is sent and indicate channel；

Step 2: decoding the group HARQ instruction channel listened to；

Step 3: according to the 4th rule, determining that group HARQ indicates information from decoded group of HARQ instruction channel；

Include: step A before step 1: data of the decoding from network access point obtain the group ID of an IoT logical groups, and really Surely become a group and coordinate terminal, wherein the IoT logical groups are that network access point is determined according to Second Rule；

Step B: the data of internet-of-things terminal in this group are sent in first time point according to third rule.

2. based on a group HARQ transmission method for communication in scenes of internet of things according to claim 1, it is characterised in that: step In A, the Second Rule is defined as network access point will be multiple according to specific group of scale in a determining geographic area Internet-of-things terminal is configured to an IoT logical groups；Further, which is assigned a group ID；Network access point will Group ID is sent to a group coordination terminal, and group is coordinated terminal and determined by network access point；The data of each internet-of-things terminal are sent in the group Terminal progress is coordinated by the group with receiving, each internet-of-things terminal is assigned ID in a group；Group, which coordinates terminal, to be had in a group ID mapping table in the physics ID and group of terminal；

The group scale of one IoT logical groups is defined as open ended internet-of-things terminal number in a group, is expressed as N_UE；

ID is determined by network access point in the group of internet-of-things terminal in one IoT logical groups, by the object in IoT logical groups The group that ID mapping table is handed down to each group in the physics ID and group of networked terminals coordinates terminal；Internet of Things in one IoT logical groups ID is the C-RNTI of network access point distribution in the group of terminal.

3. based on a group HARQ transmission method for communication in scenes of internet of things according to claim 1, it is characterised in that: in step In rapid B, which indicates the time that data are sent for the first time；Described group of coordination terminal according to third rule send this one The data of all internet-of-things terminals in group, third transmission rule are defined as each internet-of-things terminal in group and send the data to each group Coordinate terminal, each group coordinate terminal will organize in data group generated data packet in first time point be sent to network access point, one Content includes packet sequence number, organizes ID in the group of ID, internet-of-things terminal, the data of each terminal, a number in group in data packet According to the scale of packet；The scale of one data packet indicates internet-of-things terminal number in corresponding group an of data packet, is denoted as K；K Value be 1, i.e., group coordinate terminal will organize in the data of each internet-of-things terminal be sent to network access point one by one.

4. based on a group HARQ transmission method for communication in scenes of internet of things according to claim 3, it is characterised in that: K's Value range is as defined in agreement, and each group of K is determined by network access point, when forming an IoT logical groups, network insertion Point, which is handed down to each group by high-level signaling, coordinates terminal.

5. based on a group HARQ transmission method for communication in scenes of internet of things according to claim 1, it is characterised in that: described Third rule will organize in internet of things data when being combined into data packet, specifically: group coordinate terminal by K organize in Internet of Things end The data at end add CRC bit respectively, then multiple data are arranged in order, and then carry out coding transmission.

6. based on a group HARQ transmission method for communication in scenes of internet of things according to claim 5, it is characterised in that: described Third rule will organize in internet of things data when being combined into data packet, specifically: group coordinate terminal by K organize in Internet of Things end The data at end cascade in order, and CRC bit is added, then carries out coding transmission.

7. based on a group HARQ transmission method for communication in scenes of internet of things according to claim 1, it is characterised in that: step In 3, in the described group of HARQ instruction channel of group HARQ instruction information carrying in step 2, to feeding back ACK/NACK, HARQ is organized Instruction information is that network access point is sent to a group coordination terminal, other terminals in each IoT logical groups do not go to monitor or solve code character HARQ indicates channel；Group coordinates terminal and judged for the second time according to the rule predefined in first time point transmission data Point, and a group HARQ instruction channel is begun listening at the second time point；

One group HARQ instruction channel bearing, one group HARQ indicates information；

The shared group HARQ of all IoT logical groups in a network access point indicates that channel, i.e. group HARQ indicate channel It is broadcast channel；This group of HARQ instruction one piece of common radio resources of channel occupancy are transmitted；In a network access point, one The corresponding HARQ of a IoT logical groups indicates channel, i.e. group HARQ instruction channel is Multicast Channel；

In step 3, content, the specification of format that the 4th rule includes for a group HARQ instruction information, a group HARQ instruction information include content include one or more NACK instruction information, one or more ACK indicate information, one or Multiple ACK/NACK instruction information, one or more terminal indexes, one or more processes for organizing ID, one or more data packets Wherein one or more of index.

8. based on a group HARQ transmission method for communication in scenes of internet of things according to claim 7, it is characterised in that: the 4th Rule indicates that information is the corresponding multiple Internet of Things of a data packet that a corresponding group coordinates that terminal is sent for a group HARQ Terminal, which includes one or more NACK instruction information and one or more terminal indexes, is not had There is ACK；One or more NACK instruction information indicates that the index of the one or more terminal in a data packet is corresponding Internet-of-things terminal Data reception errors；Optionally, this group of HARQ instruction information includes a group ID；

4th rule indicates that information is that the data packet that corresponding group coordination terminal is sent is corresponding more for a group HARQ A internet-of-things terminal, which includes one or more terminal indexes；One or more terminal index The Data reception errors of one or more internet-of-things terminals in a corresponding data packet；Accordingly, it is not included in a group HARQ indicates the terminal index in information, and group, which coordinates terminal, can determine whether that corresponding internet-of-things terminal data receiver is correct；Optionally, This group of HARQ instruction information includes a group ID；In second example, which indexes a corresponding data The data receiver of one or more internet-of-things terminals in packet is correct；Ying Di is not included in a group HARQ instruction information Terminal index, group, which coordinates terminal, can determine whether corresponding internet-of-things terminal Data reception errors；Optionally, this group of HARQ indicates information Include a group ID；

4th rule indicates that information is that the data packet that corresponding group coordination terminal is sent is corresponding more for a group HARQ A internet-of-things terminal, which includes in one or more ACK instruction information and one or more groups ID, without NACK；One or more ACK instruction information indicates the index pair of the one or more terminal in a data packet The internet-of-things terminal data receiver answered is correct；This group of HARQ instruction information includes a group ID；

4th rule indicates that information is that the data packet that corresponding group coordination terminal is sent is corresponding more for a group HARQ A internet-of-things terminal, which includes that multiple ACK/NACK indicate information；Multiple value is K；It should Group HARQ instruction information includes a group ID；

4th rule indicates that information is that the data packet that corresponding group coordination terminal is sent is corresponding more for a group HARQ A internet-of-things terminal, which includes multiple ACK/NACK instruction information and multiple terminals index；It should Multiple values is K；This group of HARQ instruction information includes a group ID；

4th rule indicates that information is the data packet that a corresponding group coordinates that terminal is sent, a group for a group HARQ HARQ indicates that information includes that a NACK indicates information；Wherein, which receives wrong Accidentally；A channel is indicated when a group coordination terminal does not listen to group HARQ, then it is correct to judge that corresponding data packet receives；4th rule Then indicate that information also includes a group ID for a group HARQ；

4th rule indicates that information is the data packet that a corresponding group coordinates that terminal is sent, a group for a group HARQ HARQ indicates that information includes that an ACK indicates information；Wherein, which receives correct； A channel is indicated when a group coordination terminal does not listen to group HARQ, then judges that corresponding data packet receives mistake；4th rule Indicate that information also includes a group ID for a group HARQ；

4th rule indicates that information is multiple data packets that corresponding multiple groups of coordination terminals are sent, a group for a group HARQ HARQ indicates that information includes one or more group ID, and one or more ACK indicates information；Wherein, the one or more group ID corresponds to one or more IoT logical groups, and one or more ACK indicate one that corresponding one or more IoT logical groups are sent A or multiple data packets receive correct；

4th rule indicates that information is multiple data packets that corresponding multiple groups of coordination terminals are sent, a group for a group HARQ HARQ indicates that information includes one or more group ID, and one or more NACK indicates information；Wherein, the one or more group ID corresponds to one or more IoT logical groups, and one or more NACK indicate one that corresponding one or more IoT logical groups are sent A or multiple data packets receive mistake；

4th rule indicates that information is multiple data packets that corresponding multiple groups of coordination terminals are sent, a group for a group HARQ HARQ indicates that information includes one or more group ID；Wherein, the corresponding one or more IoT logical groups of the one or more group ID； One or more group ID indicates that one or more data packets that one or more IoT logical groups are sent receive mistake；This one It is correct that a or multiple group of ID indicates that one or more data packets that one or more IoT logical groups are sent receive；

4th rule indicates that information is multiple data packets that a corresponding group coordinates that terminal is sent, a group for a group HARQ HARQ indicates that information includes to index no more than multiple data packet process；The process rope no more than multiple data packet Drawing indicates that corresponding data packet receives correctly；

4th rule indicates that information is multiple data packets that a corresponding group coordinates that terminal is sent, a group for a group HARQ HARQ indicates that information includes that the process index of multiple data packet and multiple ACK/NACK indicate information；

Determine that group HARQ indicates an information from decoded group of HARQ instruction channel according to the 4th rule, specific steps include: by According to the 4th rule, a group HARQ instruction channel is not heard such as, then judges that data packet is properly received；Such as listen to a group HARQ instruction letter Road solves code character HARQ and indicates channel, determines that the group HARQ obtained instruction information determines first according to the second time point for NACK Time point retransmits corresponding raw data packets；

Determine that group HARQ indicates an information from decoded group of HARQ instruction channel according to the 4th rule, specific steps include: by According to the 4th rule, a group HARQ instruction channel is not heard such as, then judges that data packet receives mistake；Such as listen to a group HARQ instruction letter Road determines that the group HARQ obtained instruction information is that ACK according to the second time point determines first time point, retransmit other the One time point corresponding raw data packets；

Determine that group HARQ indicates an information from decoded group of HARQ instruction channel according to the 4th rule, specific method include: by According to the 4th rule, a group HARQ instruction channel is not heard such as, then judges that data packet is properly received；Such as listen to a group HARQ instruction letter Road, solution code character HARQ indicate channel, and the determining group HARQ instruction information obtained is NACK and organizes interior ID, ID in retransmission group The data of corresponding internet-of-things terminal；

Determine that group HARQ indicates an information from decoded group of HARQ instruction channel according to the 4th rule, specific method include: by According to the 4th rule, a group HARQ instruction channel is not heard such as, then judges that data packet receives mistake；Such as listen to a group HARQ instruction letter Road, the group HARQ of determining acquisition indicate that information is ACK and organizes interior ID, remaining of ID in the interior removing acquisition group of retransmission group The data of internet-of-things terminal；

Determine that group HARQ indicates an information from decoded group of HARQ instruction channel according to the 4th rule, specific method include: by According to the 4th rule, determines that the group HARQ instruction information obtained is ID in ACK/NACK indicates information and organizes, retransmit ACK/ NACK indicates information for the data of the corresponding internet-of-things terminal of ID in the group of NACK；

Determine that group HARQ instruction information is NACK, according to the first regular retransmission data.

9. based on a group HARQ transmission control system for communication in scenes of internet of things, it is characterised in that: the control system includes one kind Terminal, for completing the internet of things service and group HARQ transmission, control of terminal, comprising: RF receiving and transmission module, processor, storage Device and group HARQ function module；The RF receiving and transmission module is sent into the processor for receiving the wireless signal from base station Signal processing is carried out, and sends the signal from the processor；Being stored in the memory can be by the processor The instruction of execution；The processor is used to call the described instruction of the memory storage, and the processor and described group HARQ function module carries out information exchange；Described group of HARQ function module includes group HARQ monitoring submodule, group HARQ solution numeral Module and group HARQ manage submodule, and described group of HARQ monitoring submodule is for monitoring the wireless signal that the radio-frequency module receives In with the presence or absence of group HARQ indicate a channel, described group of HARQ decoding sub-module is for decoding described group of HARQ monitoring submodule confirmation Group HARQ indicate channel, information is indicated with acquisition group HARQ, described group of HARQ management submodule is according to decoded group of HARQ Indicate that information carries out the control of subsequent HARQ transmission.

10. based on a group HARQ transmission control system for communication in scenes of internet of things, it is characterised in that: the control system includes one kind Base station, for controlling business transmission and HARQ transmission, control in scenes of internet of things based on group communication, comprising: radio-frequency receiving-transmitting Module, processor, memory and group HARQ function module, the RF receiving and transmission module is for receiving the wireless communication for carrying out self terminal Number, it is sent into the processor and carries out signal processing, and send the signal from the processor；It is stored in the memory The instruction that can be executed by the processor；The processor is used to call the described instruction of the memory storage, and described Processor and described group of HARQ function module carry out information exchange；Described group of HARQ function module includes group HARQ encoding submodule Submodule is managed with group HARQ, described group of HARQ encoding submodule obtains the data from internet-of-things terminal based on the processor Decoding result, generation group HARQ indicate information, and generation group HARQ indicates channel, and described group of HARQ management submodule is according to described group The HARQ transmission for the group HARQ instruction each internet-of-things terminal of information management that HARQ encoding submodule generates.