CN116455528A

CN116455528A - Data transmission method and device

Info

Publication number: CN116455528A
Application number: CN202210191913.0A
Authority: CN
Inventors: 刘云
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-01-05
Filing date: 2022-02-28
Publication date: 2023-07-18

Abstract

A data transmission method and device relates to the technical field of communication, and can improve the communication performance in a side uplink scene, and the method comprises the following steps: the method comprises the steps that receiving equipment receives N transmission blocks TB, wherein N is a positive integer; the receiving device obtains the upper limit of the transmission times of the feedback channel and the parameters of the comb teeth, and sends feedback information for M TB in the N TB according to the parameters of the comb teeth and the upper limit of the transmission times, wherein M is a positive integer, M is smaller than or equal to N, M is smaller than or equal to the upper limit P of the number of feedback information sent by the receiving device, the upper limit P of the number is determined according to the upper limit of the transmission times and the parameters of the comb teeth, and P is a positive integer.

Description

Data transmission method and device

The present application claims priority from the chinese patent office, application number 202210007015.5, entitled "PSFCH channel carrying multiple TB feedback information," filed on day 05, 2022, 01, the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a data transmission method and apparatus.

Background

Currently, for a transmitting device and a receiving device of communication, the reliability of data transmission can be improved by a hybrid automatic repeat request (hybrid automatic repeat request, HARQ) mechanism. Specifically, for the receiving device, the receiving device receives the data information from the transmitting device, and may feed back the decoding condition of the data information to the transmitting device, and the transmitting device determines whether to retransmit the data information according to the decoding condition of the receiving device. Wherein the data information may be transmitted in a transport block (transmission block, TB) format. In some schemes, if the receiving device can successfully decode the data information (TB), the receiving device feeds back an HARQ Acknowledgement (ACK) message to the transmitting device, and the transmitting device may learn that the data information is successfully decoded according to the HARQ-ACK (may be simply referred to as ACK), and thus does not retransmit the data information. Otherwise, if the decoding of the data information fails, the receiving device feeds back a HARQ Negative Acknowledgement (NACK) message to the transmitting device, and the transmitting device may learn that the decoding of the data information fails according to the HARQ NACK (may be simply referred to as NACK), so as to retransmit the data information.

After introducing a Sidelink (SL) scenario, terminals may communicate directly with each other, and one terminal may communicate with multiple terminals at the same time. If SL communication is performed through unlicensed spectrum, the receiving device generally needs to send ACK or NACK for multiple TBs, where multiple TBs may come from the same or different sending devices, and the requirement on data transmission performance is high, and the above conventional HARQ mechanism cannot meet the communication requirement of the SL scenario, so it is needed to propose an HARQ mechanism suitable for the SL scenario in order to improve the performance of communication between terminals in the SL scenario.

Disclosure of Invention

The application provides a data transmission method and device, which can improve the communication performance between terminals in a SL scene.

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

in a first aspect, a data transmission method is provided, which may be applied to an electronic device or an apparatus (such as a chip system) implementing a function of the electronic device, where the method includes:

the method comprises the steps that a receiving device receives N Transmission Blocks (TB), acquires the upper limit of the transmission times of a feedback channel and parameters of comb teeth, and sends feedback information for M TB in the N TB through the comb teeth according to the parameters of the comb teeth and the upper limit of the transmission times.

The N is a positive integer; the M is a positive integer, the M is smaller than or equal to the N, the M is smaller than or equal to the upper limit P of the number of feedback information sent by the receiving equipment, the upper limit P of the number is determined according to the upper limit of the transmission times and the parameters of the comb teeth, and the P is a positive integer.

In the data transmission method of the embodiment of the present application, on one hand, in some scenarios, the receiving device does not feed back for each TB received, so signaling overhead in the HARQ process can be reduced; on the other hand, the number of feedback information sent by the receiving device is smaller than or equal to the upper number limit P (P is determined according to the comb teeth parameter and the upper transmission number limit), so that the receiving device can transmit as much feedback information as possible when the upper transmission number limit and the comb teeth parameter are met, and therefore, the reliability of the HARQ process can be improved. In combination, the data transmission performance can be improved.

The parameters of the comb teeth comprise the interval between adjacent physical resource blocks PRBs in the comb teeth and/or the number of PRBs in the comb teeth.

In one possible design of the first aspect, the upper number limit P satisfies the following condition:

or->Or->Or (b)Or->Or->

Wherein L represents the upper limit of the number of transmissions,GAP represents the spacing between adjacent PRBs in the comb teeth,/PRB, and GAP represents the number of PRBs in the bandwidth occupied by data transmission>The number of PRBs in the comb is represented.

In one possible design of the first aspect, the sending feedback information includes:

transmitting feedback information through the Q PRBs of the first comb teeth; q is a positive integer;or-> The comb teeth include the first comb teeth.

In one possible design of the first aspect,in the case of (a), the first comb teeth include PRBs greater than Q.

For example, q=4, and the first comb teeth include 5 PRBs, and the feedback information may be transmitted through 4 or 5 PRBs of the first comb teeth. If the 5 PRBs of the first comb teeth are occupied, the feedback information can be repeatedly transmitted on more PRBs, so that the reliability of the feedback information can be improved. If the 4 PRBs of the first comb teeth are occupied, more feedback information can be transmitted by reducing the repeated transmission times of each feedback information.

In one possible design of the first aspect, if Q < X, the method further comprises:

and sending feedback information through PRBs (physical resource blocks) except the Q PRBs in the first comb teeth, wherein X represents the number of the PRBs included in the first comb teeth.

In one possible design of the first aspect, the upper number limit P satisfies the following relationship:

or->Or->

In one possible design of the first aspect, sending the feedback information includes:

transmitting feedback information through R PRBs of the second comb teeth;

and R is a positive integer, wherein the R PRBs at least comprise PRBs with the highest frequency band and PRBs with the lowest frequency band in the second comb teeth, and the comb teeth comprise the second comb teeth.

In the mode, feedback information is transmitted at least through PRB (physical resource block) of the highest frequency band and the lowest frequency band of the comb teeth, so that data transmission can be guaranteed to meet bandwidth occupation requirements, communication bandwidth of terminals is guaranteed, and meanwhile mutual detection between the terminals is facilitated.

In one possible design of the first aspect, the upper number limit P satisfies the following relationship: Or->

Wherein N is _interlace Indicating the number of fingers available for the feedback channel, L indicating the upper limit of the number of transmissions.

In one possible design of the first aspect, sending the feedback information includes: and sending feedback information through the PRB with the highest frequency band and the PRB with the lowest frequency band in the first comb teeth.

In this way, on one hand, the PRB of the highest frequency band and the lowest frequency band of the comb teeth can meet the requirement of occupying channel bandwidth (occupied channel bandwidth, OCB), and on the other hand, the number of repeated transmission times of each feedback information can be reduced, so that more feedback information can be sent.

In one possible design of the first aspect, the range of values of M satisfies the following condition:

2 ^M-1 ≤N _CS ；

wherein N is _CS Representing an upper limit on the number of available sequence pairs for the feedback channel, each sequence pair comprising two sequences.

In this way, the value range of M can be determined from the resource perspective, so that the receiving device determines the number of feedback information to be fed back according to the value range of M.

In one possible design of the first aspect, the method further comprises:

receiving indication information; the indication information is used for indicating the upper limit of the M.

In one possible design of the first aspect, the indication information is further used to indicate a time domain end position of the N TBs.

In one possible design of the first aspect, a sequence pair is determined according to M-1 of the feedback information corresponding to M-1 TBs of the M TBs, the sequence pair being used to carry the feedback information of the M-1 TBs;

and the sequence is determined according to feedback information except the M-1 feedback information in M feedback information corresponding to the M TB, the sequence is used for bearing the feedback information except the M-1 feedback information in the M feedback information, and the sequence pair comprises the sequence.

In one possible design of the first aspect, a sequence is determined according to M pieces of feedback information corresponding to the M TBs, where the sequence is used to carry the M pieces of feedback information.

In one possible design of the first aspect, the sequence pairs are determined according to the following formula:

(P _ID +M _ID +k’)mod N _CS ；

wherein P is _ID Representing source identity of physical layer, M _ID Representing parameters related to propagation type, k' being parameters related to M-1 feedback information of the M feedback information, N _CS Representing the number of available sequence pairs for the feedback channel, mod represents the modulo operator.

In this way, the sequence pair is determined according to M-1 feedback information in the M feedback information, so that the sequence pair can represent, indicate or carry the M-1 feedback information. A sequence is determined from the sequence pair based on the remaining 1 feedback information such that the determined sequence is capable of carrying or representing the 1 feedback information. The receiving device sends the sequence to the sending device, so that the sending device can learn feedback information carried by the sequence.

In one possible design of the first aspect, the sequence is determined according to the following formula:

wherein P is _ID Representing source identity of physical layer, M _ID Representing a parameter related to the propagation type, k being a parameter related to the M feedback information,representing the number of available sequences of the feedback channel, < >>The number of available PRBs representing the feedback channel, b, is related to the number of sequences used within one PRB.

In one possible design of the first aspect, the number of TBs that fail decoding of the N TBs is S;

if S is more than or equal to P, the M TB are P TB which fail decoding in the N TB, and the feedback information corresponding to the M TB is NACK for the P TB; or, in the case of S < P, the M TBs include the S TBs, and the feedback information corresponding to the M TBs includes NACKs for the S TBs.

That is, when there are more TBs that fail decoding (more than the upper limit P of the number of feedback information), the receiving apparatus feeds back feedback information for the top P TBs that fail decoding at most. When there are few TBs that fail decoding (less than the upper limit P of the number of feedback information), the receiving device may feedback NACKs for all the TBs that fail decoding.

In one possible design of the first aspect, if all the N TBs are decoded successfully, the M TBs are the last TB of the N TBs, and the feedback information corresponding to the M TBs is an ACK for the last TB.

In the scheme, the effect of feeding back more than P TB decoding conditions is achieved by feeding back NACK as much as possible. For example, in some examples, the receiving device may send only 1 NACK for tb#4 to the transmitting device, so that the transmitting device may learn that the receiving device decodes the remaining TBs, and signaling overhead in the transmission process is small. That is, with less feedback information (e.g., only the feedback information of tb#4), more decoding results of TBs (e.g., decoding results of tbs#1-tb#8) can be carried.

In a second aspect, a data transmission method is provided, which may be applied to a transmitting device or an apparatus (such as a chip system) implementing a function of the transmitting device, where the transmitting device is used to perform the method as an example, and the method includes:

the method comprises the steps that a transmitting device transmits N transmission blocks TB, wherein N is a positive integer;

receiving feedback information aiming at M TB in the N TB through a comb tooth, wherein M is a positive integer, M is smaller than or equal to N, M is smaller than or equal to the upper limit P of the number of feedback information sent by the receiving equipment, the upper limit P of the number is determined according to the upper limit of the transmission times and parameters of the comb tooth, and P is a positive integer.

In one possible design of the second aspect, the sending feedback information includes:

In one possible design of the second aspect, if Q < X, the method further comprises:

In one possible design of the second aspect, sending the feedback information includes:

transmitting feedback information through R PRBs of the second comb teeth;

In one possible design of the second aspect, the method further comprises:

In the second aspect, description of other technical features may be found in the related description in the first aspect. For example, the upper limit P of the number may be calculated by referring to the description of the related content in the first aspect.

In a third aspect, there is provided a communication apparatus, which may be an electronic device or an apparatus (such as a chip system) implementing a function of an electronic device, the apparatus comprising:

A communication interface for receiving N transport blocks TBs;

the processor is used for the receiving equipment to acquire the transmission frequency upper limit of the feedback channel and the parameters of the comb teeth;

and the communication interface is used for sending feedback information aiming at M TB in the N TB through the comb teeth according to the parameters of the comb teeth and the upper limit of the transmission times.

Optionally, the parameters of the comb teeth include an interval between adjacent physical resource blocks PRBs in the comb teeth and/or a number of PRBs in the comb teeth.

In one possible design of the third aspect, the upper number limit P satisfies the following condition:

or->Or->Or (b)Or->Or->

In one possible design of the third aspect, the sending feedback information includes:

In one possible design of the third aspect,in the case of (a), the first comb teeth include PRBs greater than Q.

In a possible design of the third aspect, the communication interface is further configured to send feedback information through PRBs within the first comb except for the Q PRBs in case of Q < X, where X represents a number of PRBs included in the first comb.

In one possible design of the third aspect, the upper number limit P satisfies the following relationship:

or->Or->

In one possible design of the third aspect, sending the feedback information includes:

transmitting feedback information through R PRBs of the second comb teeth;

In one possible design of the third aspect, the upper number limit P satisfies the following relationship: Or->

In one possible design of the third aspect, sending the feedback information includes: and sending feedback information through the PRB with the highest frequency band and the PRB with the lowest frequency band in the first comb teeth.

In one possible design of the third aspect, the range of values of M satisfies the following condition:

2 ^M-1 ≤N _CS ；

In a possible design of the third aspect, the communication interface is further configured to receive indication information; the indication information is used for indicating the upper limit of the M.

In one possible design of the third aspect, the indication information is further used to indicate a time domain end position of the N TBs.

In one possible design of the third aspect, a sequence pair is determined according to M-1 pieces of the feedback information corresponding to M-1 TBs in the M TBs, and the sequence pair is used for carrying the feedback information of the M-1 TBs;

In one possible design of the third aspect, a sequence is determined according to M pieces of feedback information corresponding to the M TBs, where the sequence is used to carry the M pieces of feedback information.

In one possible design of the third aspect, the sequence pairs are determined according to the following formula:

(P _ID +M _ID +k’)mod N _CS ；

wherein P is _ID Representing the source identity of the physical layer,M _ID representing parameters related to propagation type, k' being parameters related to M-1 feedback information of the M feedback information, N _CS Representing the number of available sequence pairs for the feedback channel, mod represents the modulo operator.

In one possible design of the third aspect, the sequence is determined according to the following formula:

In one possible design of the third aspect, the number of TBs that fail decoding from the N TBs is S;

In one possible design of the third aspect, if all the N TBs are decoded successfully, the M TBs are the last TB of the N TBs, and the feedback information corresponding to the M TBs is an ACK for the last TB.

In a fourth aspect, there is provided a communication apparatus, which may be a transmitting device or an apparatus (such as a chip system) implementing a function of the transmitting device, the apparatus comprising:

and the communication interface is used for transmitting the N transmission blocks TB and receiving feedback information aiming at M TB in the N TB through the comb teeth.

The N is a positive integer; the M is a positive integer, the M is smaller than or equal to the N, the M is smaller than or equal to the upper limit P of the number of feedback information sent by the receiving equipment, the upper limit P of the number is determined according to the upper limit of the transmission times and parameters of the comb teeth, and the P is a positive integer.

In one possible design of the fourth aspect, the sending feedback information includes:

In one possible design of the fourth aspect, the communication interface is further configured to send feedback information through PRBs within the first comb except for the Q PRBs in case of Q < X, where X represents a number of PRBs included in the first comb.

transmitting feedback information through R PRBs of the second comb teeth;

In a possible design of the fourth aspect, the communication interface is further configured to receive indication information; the indication information is used for indicating the upper limit of the M.

In a fourth aspect, reference may be made to the description relating to the third aspect for a description of other technical features. For example, the calculation of the upper limit P of the number may be described in the third aspect.

In a fifth aspect, embodiments of the present application provide a communication device having a function of implementing the data transmission method of any one of the above aspects. The functions can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a sixth aspect, there is provided a communication apparatus comprising: a processor and a memory; the memory is configured to store computer-executable instructions that, when executed by the communication device, cause the communication device to perform the data transmission method of any of the above aspects.

In a seventh aspect, there is provided a communication apparatus comprising: a processor; the processor is configured to perform the data transmission method according to any one of the above aspects according to the instructions after being coupled to the memory and reading the instructions in the memory.

In an eighth aspect, there is provided a computer readable storage medium having instructions stored therein which, when run on a computer, cause the computer to perform the data transmission method of any one of the above aspects.

In a ninth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the data transmission method of any of the above aspects.

In a tenth aspect, there is provided circuitry comprising processing circuitry configured to perform the data transmission method of any of the above aspects.

In an eleventh aspect, there is provided a chip comprising a processor, the processor being coupled to a memory, the memory storing program instructions that when executed by the processor implement the data transmission method of any one of the above aspects.

A twelfth aspect provides a communication system comprising the transmitting device of any one of the above aspects, the receiving device of any one of the above aspects.

The technical effects of any one of the second to twelfth aspects may be referred to the technical effects of the different designs in the first aspect, and will not be described herein.

Drawings

FIG. 1 is a diagram of a method for determining a cyclic shift sequence in the related art;

fig. 2 is a schematic diagram of a method for determining a channel busy proportion in the related art;

fig. 3 is a schematic architecture diagram of a communication system according to an embodiment of the present application;

fig. 4 is another architecture schematic diagram of a communication system according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 6 is a flow chart of a data transmission method according to an embodiment of the present application;

fig. 7 to fig. 12 are schematic diagrams of a method for transmitting data through comb teeth according to an embodiment of the present application;

fig. 13 is another flow chart of a data transmission method according to an embodiment of the present application;

fig. 14 is a schematic diagram of a method for determining a cyclic shift sequence according to an embodiment of the present application;

fig. 15 is a schematic diagram of another method for determining a cyclic shift sequence according to an embodiment of the present application;

fig. 16 is a schematic diagram of a method for transmitting data through comb teeth according to an embodiment of the present application;

Fig. 17 to 20 are schematic diagrams of HARQ processes provided in the embodiments of the present application;

fig. 21 is another flow chart of a data transmission method according to an embodiment of the present application;

fig. 22 is another flow chart of the data transmission method provided in the embodiment of the present application;

fig. 23 is a schematic diagram of a method for transmitting data through comb teeth according to an embodiment of the present application;

fig. 24 is another flow chart of the data transmission method provided in the embodiment of the present application;

fig. 25 is a schematic diagram of a method for determining a channel busy proportion according to an embodiment of the present application;

fig. 26 is another schematic diagram of a method for determining a channel busy proportion according to an embodiment of the present application.

Fig. 27 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the specification and the appended claims, the singular forms "a," "an," "the," and "the" are intended to include, for example, "one or more" such forms of expression, unless the context clearly indicates to the contrary. It should also be understood that in the various embodiments herein below, "at least one", "one or more" means one or more than two (including two). The term "and/or" is used to describe an association relationship of associated objects, meaning that there may be three relationships; for example, a and/or B may represent: a alone, a and B together, and B alone, wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship.

Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise. The term "coupled" includes both direct and indirect connections, unless stated otherwise.

The terms "first" and "second" are used below for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

First, some technical terms related to the embodiments of the present application are described:

1. side Link (SL)

In some scenarios, side communication can be performed between terminals, i.e., direct communication can be performed between terminals, without forwarding by a base station. At this time, links directly connecting terminals to each other are called SL.

Physical sidelink control channel (physical sidelink control channel, PSCCH): for carrying sidestream control information (sidelink control information, SCI). The SCI may be used to indicate at least one of a coded modulation format, a time-frequency resource, resource reservation information, retransmission indication, a terminal source address, a terminal destination address, hybrid automatic repeat request (Hybrid automatic repeat request, HARQ) information, etc. of the sidelink data information, and the receiving device for the sidelink communication receives and analyzes the SCI on the PSCCH, and further receives and analyzes the sidelink data information according to the analyzed SCI.

Physical sidelink shared channel (physical sidelink share channel, PSSCH): the method is used for bearing the side line data information, wherein the side line data information is business data information during side line communication.

SL scenes include, but are not limited to, vehicle-to-everything (V2X), vehicle-to-vehicle (vehicle to vehicle, V2V), device-to-device (D2D), and the like.

SL resource pool (resource pool)

In a New Radio (NR) SL, a terminal may transmit based on a resource pool. Resource pools are logical concepts. One resource pool may include a plurality of physical resources, any one of which may be used to transmit data. When the terminal performs data transmission, resources need to be selected from the resource pool. The resource selection may be that the terminal selects a resource from the resource pool according to the indication information of the network device and uses the resource to perform data transmission, or the terminal may autonomously select a resource from the resource pool and uses the resource to perform data transmission.

In some examples, each resource pool contains one or more subchannels (sub-channels). Optionally, in one resource pool, the number of frequency domain resources occupied by each sub-channel, such as physical resource blocks (physical resource block, PRBs), is the same, and in each sub-channel belonging to different resource pools, the frequency domain resources occupied by each sub-channel may be different. It should be noted that, in the embodiment of the present application, the number of frequency domain resources occupied by each sub-channel is not limited.

3. SL (sidelink unlicensed band, SL-U) over unlicensed spectrum

As an important issue in the R18 standard, the SL-U main content is SL transmission using unlicensed spectrum.

In general, when terminals communicate, it is necessary to detect whether or not the terminals exist, if a certain terminal has a low communication bandwidth, other terminals cannot easily identify the terminal, and in addition, the transmission efficiency of the terminal is affected due to the low communication bandwidth of the terminal. For this reason, for unlicensed spectrum, some rules need to be followed when used. For example, in the bandwidth with granularity of 20MHz, at least 80% of the frequency spectrum in the bandwidth is occupied, so as to increase the communication bandwidth, facilitate mutual identification between terminals and facilitate improvement of the transmission efficiency of the terminals.

4. NR (new radio unlicensed band, NR-U) over unlicensed spectrum

In NR-U technology, unlicensed spectrum may be used for NR transmission. In some arrangements, comb (interface) is used for transmission. Each comb may include a plurality of PRBs. A terminal may transmit data on some or all of the plurality of PRBs.

5. Physical side uplink feedback channel (physical sidelink feedback channel, PSFCH)

5.1 in some schemes, the above-described ACK or NACK may be carried with the PSFCH.

Currently, the HARQ feedback process described above is supported in unicast and multicast scenarios. In the unicast scene, if the received TB is successfully decoded, the receiving device feeds back ACK to the sending device; if decoding fails, the receiving device feeds back NACK.

In the multicast scenario, the receiving device determines whether to transmit HARQ feedback according to parameters such as a distance between the receiving device (TX UE) and the transmitting device (RX UE) and/or reference signal received power (reference signal receiver power, RSRP). Specifically, in the multicast scenario, the HARQ feedback has the following two options:

option (Option) 1: if the TB decoding fails, NACK is fed back, and no signal is transmitted in other cases. Option 1 supports all receiving devices within a group sharing the PSFCH resource.

Option 2: if the TB decoding is successful, the receiving device feeds back ACK, and if the TB decoding is failed, the receiving device feeds back NACK. Option 2 supports each receiving device to use separate PSFCH resources.

Optionally, at least 1 symbol PSFCH is supported in unicast and multicast option 1 and option 2, which may multiplex the sequence bearing information of format (format) 0 of the physical uplink control channel (physical uplink control channel, PUCCH).

5.2 periodicity of PSFCH

In the resource pool, the resources of the PSFCH occur in a period, the value of which includes, but is not limited to, 1, 2, and 4 slots. The PSSCH received by the terminal in one period of time requires feedback on the PSFCH in the corresponding period.

Illustratively, for one PSSCH occurring in slot (slot) n, the corresponding PSFCH occurs on slot n+a. a is the smallest integer greater than or equal to parameter K. Optionally, the parameter K is related to the processing delay. Assuming that K of all terminals is the same value, when the resources of the PSFCH occur with the period T1, there is a PSSCH corresponding to the PSFCH resources on T1 slots on one slot.

6. Cyclic shift pair (cyclic shift pair, CS pair), cyclic shift sequence

In some examples, the ACK or NACK described above may be carried using a cyclic shift sequence.

In some aspects, the terminal may determine a cyclic shift sequence for transmitting the PSFCH as follows.

The terminal can determine a group of Resource Blocks (RBs) according to the configuration information sl-PSFCH-RB-Set, namelyTerminal slave->Middle division For N on the ith time slot _subch The j-th subchannel among subchannels (subchannels).

Wherein, the liquid crystal display device comprises a liquid crystal display device,the order of dividing the PRBs is determined in descending order of i and j after the end. For the ith slot, the PSFCH may occupy two consecutive symbols on the ith slot. / >

Terminal determines resource set of PSFCH asWherein, the liquid crystal display device comprises a liquid crystal display device,is a cyclic shiftThe number of pairs is determined by the configuration information sl-NumMuxCS-Pair. />There are two possibilities for the value of (1), one is that the resources of the PSFCH correspond to the starting subchannel of the PSSCH. Another value +.>In this case +.>Is the PRB occupied by the PSSCH.

Next, as in (1) of fig. 1, the terminal is according toA cyclic shift pair for transmitting the PSFCH is determined. Wherein P is _ID Is the source ID of the physical layer, can be determined by SCI carried by PSSCH, M _ID Determined by the propagation type. One cyclic shift pair includes two cyclic shift sequences.

Thereafter, as in (2) of fig. 1, the terminal determines a cyclic shift sequence for transmitting the PSFCH from the cyclic shift pair according to the decoding result. Illustratively, if the decoding result is decoding failure, a cyclic shift sequence (e.g., corresponding to 1) corresponding to decoding failure is determined from the cyclic shift pair. Alternatively, if the decoding result is that the decoding is successful, a cyclic shift sequence (for example, 0) corresponding to the decoding success is determined from the cyclic shift pair.

7. Channel busy ratio (channel busy ratio, CBR)

CBR is used to describe channel busyness, and in LTE V2X and R16V 2X, a CBR value needs to be determined when PSSCH is transmitted, so as to measure the communication quality of the channel where the terminal is located. If CBR is high, which means that the channel where the current resource pool is located is very busy, for example, most of the sub-channels are occupied, then the terminal may wait for CBR to decrease and transmit PSSCH, or the terminal transmits PSSCH through other resource pools, so as not to cause resource collision.

Alternatively, CBR may be defined as: the time slot within 100ms starts with the second symbol and the received signal strength indicator (received signal strength indicator, RSSI) exceeds the threshold subchannel scale. Exemplary, concrete calculation of CBR as shown in fig. 2, CBR needs to be calculated at time n-U when the terminal is ready to transmit on resource 1 at time n. Specifically, within 100ms before the n-U time, the RSSI value of each subchannel is taken as the perceived result, which is used to calculate CBR. Taking the example that the time range is 100ms and the frequency range is 4 sub-channels, assuming that the RSSI of each sub-channel is calculated once every 1ms, 4 RSSI is calculated for 4 sub-channels every 1ms, and then 400 RSSI is calculated for 4 sub-channels in 100 ms. Wherein, the ratio of the number of RSSIs above the RSSI threshold value to 400 is CBR. Wherein the definition of U is related to the processing delay of the terminal.

8. Unlicensed spectrum access mode

Unlicensed spectrum access means include frame-based device (FBE) access and listen-before-talk (listen before talk, LBT) access. FBE access, i.e. channel idle detection is performed before each slot starts, and access is performed if channel idle is determined. LBT access, namely when there is transmission demand, channel detection is carried out at any time and access is carried out.

The CBR calculation scheme is based on FBE access, in which the channel is detected from the second symbol. The purpose is to measure the resource occupation of devices of the same system in a resource pool.

In the conventional HARQ mechanism, the receiving device needs to send feedback information to each TB received, which has a large signaling overhead and does not meet the communication requirement of the SL scenario. The communication method can be applied to SL scenes including scenes of direct communication between various terminal devices. Such as including but not limited to V2X, D2D communications, V2V communications, etc. As follows, application to V2X is mainly taken as an example, but this does not constitute a limitation on the scene to which the embodiments of the present application are applied.

Optionally, the spectrum used by the SL scenario includes, but is not limited to, unlicensed spectrum, including a frequency band around 2.4GHz, a frequency band around 5.8GHz, and so on.

Fig. 3 is a V2X communication system provided in an embodiment of the present application, as shown in fig. 3, the V2X communication system may include: a plurality of terminal apparatuses (terminal apparatus 1, terminal apparatus 2, terminal apparatus 3 … … shown in fig. 3). The terminal equipment and the surrounding terminal equipment can establish a direct communication link to realize direct communication, such as: the terminal device 1 and the terminal device 2 can communicate directly. By way of example, a direct communication link established between terminal devices may be defined as SL, and an interface through which the terminal devices directly communicate with surrounding terminal devices may be referred to as a PC5 port.

Optionally, the V2X communication system shown in fig. 3 may further include a network device. The terminal device may send the V2X message to the opposite terminal device in a network device transfer manner or access the network through the network device, for example: the terminal device 1 may send a V2X message to the network device, which sends the V2X message to the terminal device 2. For example, the interface between the terminal device and the network device may be referred to as Uu interface.

Alternatively, the network architecture shown in fig. 3 is only an exemplary architecture diagram, and embodiments of the present application do not limit the number of network elements included in the V2X communication system shown in fig. 3. Furthermore, although not shown, the network shown in fig. 3 may include other functional entities in addition to the network functional entity shown in fig. 3, such as: the application server (application server), core network device, etc., are not limited.

The network device in fig. 3 is mainly used for implementing the functions of radio physical control, resource scheduling and radio resource management, radio access control, mobility management, and the like. The network device may be AN Access Network (AN)/radio access network (radio access network, RAN) device, may be a device composed of a plurality of 5G-AN/5G-RAN nodes, and may be any one of a base station (nodeB, NB), AN evolved nodeB (eNB), a next generation nodeB (gNB), a transceiving point (transmission receive point, TRP), a transmission point (transmission point, TP), and some other access node. In the embodiment of the present application, the means for implementing the function of the network device may be the network device, or may be a means capable of supporting the network device to implement the function, for example, a chip system. In the technical solution provided in the embodiments of the present application, the device for implementing the function of the network device is the network device, which is described by taking the network device as an example.

The terminal equipment is a terminal which is accessed into the V2X communication system and has a wireless receiving and transmitting function or a chip which can be arranged on the terminal. By way of example, the terminal device may be a vehicle shown in fig. 3, which is not limited to any type of vehicle such as an automobile, a bicycle, an electric car, an airplane, a ship, a train, a high-speed rail, etc., and may include an in-vehicle device capable of directly communicating with other devices, which may be referred to as a User Equipment (UE) or a terminal device (terminal).

The terminal device may also be a user equipment, an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. For example, the terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an augmented reality (augmented reality, AR) terminal device, a vehicle user device (vehicle user equipment, VUE), a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote media), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation security (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a vehicle-mounted terminal, an RSU with a terminal function, or the like. The terminal device of the present application may also be an in-vehicle module, an in-vehicle component, an in-vehicle chip, or an in-vehicle unit that is built in a vehicle as one or more components or units, and the vehicle may implement the communication method provided in the present application through the in-vehicle module, the in-vehicle component, the in-vehicle chip, or the in-vehicle unit.

Fig. 4 shows another example of a SL scenario applicable to the embodiments of the present application. The mobile phone and the intelligent glasses can communicate according to the data transmission method provided by the embodiment of the application.

In this embodiment of the present application, the device for implementing the function of the terminal device may be the terminal device itself, or may be a device capable of supporting the terminal device to implement the function, for example, a chip system. In the embodiment of the application, the chip system may be formed by a chip, and may also include a chip and other discrete devices.

The system architecture and the service scenario described in the present application are for more clearly describing the technical solution of the present application, and do not constitute a unique limitation to the technical solution provided in the present application, and as a person of ordinary skill in the art can know, with the evolution of the system architecture and the appearance of a new service scenario, the technical solution provided in the present application is also applicable to similar technical problems.

Alternatively, the terminal device or the network device in the embodiments of the present application may be implemented by a communication device having the structure described in fig. 5. Fig. 5 is a schematic hardware structure of a communication device according to an embodiment of the present application. The communication device 400 comprises at least one processor 401, a memory 403 and at least one communication interface 404. Wherein the memory 403 may also be included in the processor 401.

The processor 401 may be comprised of one or more processing units, which may be a central processing unit (central processing unit, CPU), application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs in the present application.

Communication lines exist between the above components for communicating information between the components.

A communication interface 404 for communicating with other devices. In the embodiment of the application, the communication interface may be a module, a circuit, an interface, or other devices capable of implementing a communication function, and is used for communicating with other devices. Alternatively, the communication interface may be a separately provided transmitter that is operable to transmit information to other devices, or a separately provided receiver that is operable to receive information from other devices. The communication interface may also be a component integrating functions of sending and receiving information, and the embodiment of the application does not limit the specific implementation of the communication interface.

The memory 403 may be a read-only memory (ROM) or other type of memory module that can store static information and instructions, a random access memory (random access memory, RAM) or other type of memory module that can store information and instructions dynamically, or an electrically erasable programmable read-only memory (EEPROM), an optical disk, a magnetic disk, or other magnetic storage device. The memory may be stand alone and be coupled to the processor via a communication line. The memory may also be integrated with the processor.

Wherein the memory 403 is used to store computer-executable instructions that may be invoked by one or more processing units in the processor 401 to perform corresponding steps in the various methods provided in the embodiments described below.

Alternatively, the computer-executable instructions in the embodiments of the present application may be referred to as application code, instructions, computer programs, or other names, and the embodiments of the present application are not limited in detail.

In a particular implementation, as one embodiment, the communication device 400 may include multiple processors, such as the processor 401 and the processor 407 in fig. 5. Each of these processors may be a single-core processor or a multi-core processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In a specific implementation, if the communication device 400 is a terminal such as a mobile phone, the communication device 400 may further include an output device 405 and an input device 406, as an embodiment. The output device 405 communicates with the processor 401 and may display information in a variety of ways. For example, the output device 405 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 406 is in communication with the processor 401 and may receive user input in a variety of ways. For example, the input device 406 may be a mouse, keyboard, touch screen device, or sensing device, among others.

An exemplary block diagram of a communication device is shown in fig. 5. It should be understood that the illustrated communication device is only one example, and that in practical applications the communication device may have more or fewer components than shown in fig. 5, may combine two or more components, or may have a different configuration of components.

The communication device 400 may be a general purpose device or a special purpose device, and the embodiments of the present application are not limited to the type of the communication device 400. The terminal device may be a device having a similar structure to that of fig. 5.

The following describes a communication method provided in the embodiments of the present application with reference to the accompanying drawings.

It should be noted that the embodiment of the present application is mainly applied to a SL scenario, that is, a flow of communication between terminal devices through a PC5 interface.

Example 1

Referring to fig. 6, the communication method provided in the embodiment of the present application includes the following steps:

s101, a transmitting device transmits N TB' S to a receiving device. Accordingly, the receiving apparatus receives N TBs from the transmitting apparatus. Wherein N is a positive integer.

S102, the receiving equipment acquires the upper limit of the transmission times of the feedback channel and parameters of the comb teeth.

Illustratively, the feedback channel may be a PSFCH. Optionally, the parameters of the comb teeth include the spacing between adjacent PRBs in the comb teeth and/or the number of PRBs in the comb teeth.

The spacing between adjacent PRBs in the comb refers to the number of PRBs spaced between adjacent PRBs. Illustratively, as shown in fig. 7, the number of PRBs for the interval between adjacent PRBs (e.g., PRB1 and PRB 26) in the comb is 25. The PRB interval is set so as to occupy 80% of the frequency band in the comb teeth when the number of PRBs is as small as possible.

As a possible implementation, the upper limit of the number of transmissions may depend on the capability of the receiving device itself, or may be configured by the network device (such as a base station) for the receiving device, or the upper limit of the number of transmissions may be a pre-configured parameter in the receiving device.

Optionally, the upper transmission frequency limit may be determined by a psfch-formatezeroSidelink parameter. The upper limit of the number of transmissions includes, but is not limited to, 4,8,16.

Alternatively, the embodiment of the present application does not limit the execution sequence between S102 and S101.

In this embodiment of the present application, after acquiring the transmission frequency upper limit and the parameters of the comb teeth, the receiving device may determine the upper limit P of the number of sending feedback information according to the transmission frequency upper limit and the parameters of the comb teeth, where P is a positive integer. The feedback information is, for example, feedback information of the receiving device for M TBs of the N TBs. And M is a positive integer, and is smaller than or equal to N, and is smaller than or equal to the upper limit P of the number of feedback information sent by the receiving equipment.

The calculation of the upper limit P of the number of feedback information transmitted from the receiving apparatus is described in the following case 1.

Case 1: the upper limit P of the number satisfies the following condition:

or->Or->Or (b)Or->Or (I)>

Wherein L represents the upper limit of the number of transmissions,the GAP represents the spacing between adjacent PRBs in one comb, and represents the number of PRBs in the bandwidth occupied by data transmission. The number of transmissions indicates the number of cyclic shift sequences that the receiving apparatus supports transmission at the same time. The bandwidth occupied by data transmission may also be referred to as communication bandwidth. />Representing a rounding down, a +.>Representing an upward rounding.

Representing the number of PRBs that one comb includes. Optionally, a->Or (b) Alternatively, the number of PRBs comprised by one comb may be preconfigured with a value such as 2.

Case 2: the upper number limit P satisfies the following relationship:or->Or (b) Wherein L represents the upper limit of the number of transmissions, < >>GAP represents the spacing between adjacent PRBs in the comb teeth,/PRB, and GAP represents the number of PRBs in the bandwidth occupied by data transmission>The number of PRBs in the comb is represented.

Case 3: the upper number limit P satisfies the following relationship:or->

Wherein N is _interlace Indicating the number of combs available for the feedback channel or the number of combs available for transmitting feedback information, L indicating the upper limit of the number of transmissions. Is to formula->Is a variant of (a). />Other variations are possible, and the present application is not limited to a particular variation.

S103, the receiving device decodes the N TB.

The decoding situation of the TB by the receiving device includes the following: the N TBs fail to decode, or the N TBs include both the TB that fails to decode and the TB that fails to decode.

And S104, the receiving equipment sends feedback information aiming at M TB in the N TB according to the parameters of the comb teeth and the upper limit of the transmission times.

Wherein, M is a positive integer, M is less than or equal to N, and M is less than or equal to the upper limit P of the number of feedback information sent by the receiving device.

Alternatively, P may also be referred to as the maximum PSFCH feedback number, the upper limit of transmission capability, the maximum feedback number, etc.

It can be understood that after the receiving device decodes the N TBs, the upper limit P of the number of sending feedback information may be determined according to the upper limit of the number of transmission times and the parameters of the comb teeth, the number M of feedback information fed back to the sending device is determined according to the upper limit P of the number, and the M feedback information is fed back to the sending device, so as to feed back the decoding situation to the sending device. For example, the receiving device determines that the upper limit p=3 of the number of pieces of feedback information that can be transmitted, and then the subsequent receiving device feeds back at most 3 pieces of feedback information to the transmitting device when feeding back ACK or NACK to the transmitting device.

The following describes a specific implementation of sending feedback information to the receiving device in combination with the above cases 1 to 3.

Corresponding to the above case 1, the receiving device sends feedback information, which may be implemented as: and sending feedback information through Q PRBs of the first comb teeth, wherein the comb teeth comprise the first comb teeth. Wherein, Q is a positive integer;or-> Or Q is a preconfigured parameter such as 2./>

Wherein, the liquid crystal display device comprises a liquid crystal display device,the GAP represents the spacing between adjacent PRBs in one comb, and represents the number of PRBs in the bandwidth occupied by data transmission. That is, for a certain comb, feedback information may be transmitted by occupying Q PRBs among the plurality of PRBs included in the comb.

Exemplary, the communication bandwidth is 20MHz (the number of PRBs included in the communication bandwidth is106), the number of RBs spaced between PRBs in the comb (i.e. GAP) is 25, and the receiving device supports transmitting PSFCH 12 times at maximum (i.e. the upper limit of transmission number L is 12), for example, as shown in fig. 7, the comb may include 5 PRBs. The receiving device sends a feedback message (ACK or NACK) via the comb, at least occupying +.>The feedback information needs to be transmitted through 4 PRBs of the comb teeth. That is, each feedback information needs to be repeatedly transmitted 4 times over 4 PRBs, and each 4 PSFCH transmissions are used to support feedback of one feedback information.

Thus, 12 PSFCH transmissions (i.e., L) are actually used to support feedback at bestThe receiving device may determine that at most 3 pieces of feedback information are supported (i.e., the upper limit of the number of feedback information is 3).

According to the aboveThis formula calculates the upper limit P of the number of feedback information as an example, in other embodiments, it is also possible to calculate the upper limit P based on +>This formula calculates P, i.e

Still further exemplary, as shown in fig. 8, the receiving device transmits a feedback message via the comb, occupyingAnd the number of PRBs. That is, the receiving apparatus needs to transmit feedback information through 5 PRBs of the comb teeth, and each feedback information needs to be repeatedly transmitted 5 times.

Thus, as in fig. 8, 12 PSFCH transmissions (i.e., L) are actually used at best to support feedback And feedback information. In this case, two PSFCH transmissions may remain, and the receiving device may complete the remaining two PSFCH transmissions on the comb with the free PRBs. For example, the remaining two PSFCH transmissions may be completed on the idle PRB101, 77 of fig. 9.

Alternatively, the receiving device may also be based onThis formula calculates P, i.e.>

Alternatively, the receiving device may also be based onThis formula calculates P. For example, l=12,when (I)>

In some embodiments, inAnd the PRB (denoted as X) included in the first comb teeth is greater than Q, the receiving device may send feedback information through some or all PRBs in the PRBs included in the comb teeth. That is, the number of PRBs included in the comb may be different or the same as the number of PRBs used for transmitting feedback information in the comb.

Optionally, in some examples, the number of PRBs within the communication bandwidth is considered (i.e.) The number of PRBs (namely GAPs) which are not necessarily capable of dividing the interval between adjacent PRBs in the comb teeth can cause certain comb teeth to occupy +.>The PRBs feed back, and additionally the comb teeth occupy +.>And feeding back the PRBs. At->In order to transmit feedback information as much as possible, the receiving apparatus may transmit feedback information only on Q PRBs in one comb when PRBs included in the comb are greater than Q, and the remaining PRBs in the comb do not transmit feedback information.

Alternatively, the PRB included in the comb teeth is larger thanThe receiving device is only in the +_ of the comb teeth>The feedback information is sent on the PRBs, which can be implemented as: before the comb teeth->Feedback information is sent on the PRBs; alternatively, after the comb teeth +.>Feedback information is sent on the PRBs; alternatively, in any +.>Feedback information is transmitted on the PRBs, optionally +.>The PRBs comprise PRBs of the highest frequency band and PRBs of the lowest frequency band in the comb teeth; alternatively, the two PRBs with the lowest frequency domain position and the highest frequency domain position are includedFeedback information is transmitted on the PRBs, i.e., except for the PRB of the highest frequency band and the PRB of the lowest frequency band, The remaining PRBs of (a) may be arbitrary.

Illustratively, as in fig. 7, where the comb 1 includes 5 PRBs, the receiving device may transmit feedback information only through the 4 PRBs (PRB 1, PRB26, PRB51, PRB 76) within the comb. Comb 2 includes 5 PRBs, and feedback information is transmitted only through 4 PRBs (PRB 2, PRB27, PRB52, PRB 77) in the comb. It can be seen that, compared with the case that all PRBs in the comb teeth are occupied to send feedback information in fig. 8, 2 feedback information can be fed back, and in the technical scheme corresponding to fig. 7, when the number of available PRBs is the same, since each feedback information occupies fewer PRBs, 3 feedback information can be fed back, that is, more feedback information can be fed back in the scheme corresponding to fig. 7.

Optionally, in other examples, in the case of Q < X, the receiving device may send feedback information through PRBs other than the Q PRBs in the first comb, where X represents the number of PRBs included in the first comb, in addition to sending feedback information through the Q PRBs in the first comb.

Exemplary, as in FIG. 9 (a), ifThe upper limit of the PSFCH transmission number (i.e., L) is 13, the receiving device may be +_ according to the above formula>The upper limit P of the number of feedback information of the receiving device is preliminarily calculated. Wherein the upper limit P of the number of feedback information is 3. Assuming that the receiving device transmits the first feedback information through 4 PRBs in the comb 1, transmits the second feedback information through 4 PRBs in the comb 2, and transmits the third feedback information through 4 PRBs in the comb 3, the three feedback information needs 12 PSFCH transmissions in total, and then the PSFCH transmission capability remains 1 time.

In order to fully utilize the PSFCH transmission capability and improve the reliability of transmitting feedback information, the receiving device may select one PRB from the remaining PRBs in the comb teeth 1-3, for performing one PSFCH transmission, that is, transmitting one feedback information. For example, as shown in fig. 9 (b), the receiving device may select the PRB30 in the comb 3 and make a fifth transmission of the feedback information 3 on the PRB 30.

Optionally, in the case that there are free PRBs in the comb teeth (for example, in fig. 9, the free PRBs include PRB101 in comb teeth 1, PRB77 in comb teeth 2, and PRB30 in comb teeth 3), the receiving device may randomly select a part of PRBs on the free PRBs to perform PSFCH transmission, or select a part of PRBs from the free PRBs according to a certain policy, which does not limit the specific implementation of PRB selection in this embodiment.

Corresponding to the above case 2, as a possible implementation manner, the receiving device sends feedback information, which may be implemented as: and sending feedback information through the R PRBs of the second comb teeth.

For example, as shown in fig. 10 (a), the upper limit of transmission number L is 12, and after excluding PRBs (corresponding to two PSFCH transmissions) of the highest frequency band and the lowest frequency band in a certain comb (e.g., comb 3), the transmission number remains 10, and the receiving device calculates the upper limit of feedback information number P that can be sent by 10 PSFCH transmissions. That is, the receiving apparatus is based on The upper limit P of the number of feedback information is calculated to be 3.

As shown in fig. 10 (b), 12 PRBs (e.g., black filled PRBs) corresponding to 12 PSFCH transmissions, any 4 PRBs (e.g., PRB1, PRB26, PRB51, PRB 76) in the comb 1 are used to transmit feedback information 1, any 4 PRBs (e.g., PRB2, PRB27, PRB52, PRB 102) in the comb 2 are used to transmit feedback information 2, PRB5 of the highest frequency band and PRB105 of the lowest frequency band in the comb 3 are used to transmit feedback information 3, and any 2 PRBs (e.g., PRB30, PRB 80) other than the PRB of the highest frequency band and the lowest frequency band in the comb 3 are used to transmit feedback information.

As can be seen, in the technical solution corresponding to fig. 10, for at least one comb tooth (i.e. comb tooth 3) of the plurality of comb teeth used by the receiving device, at least the PRB of the highest frequency band and the PRB of the lowest frequency band of the comb tooth can be ensured to meet the bandwidth occupation requirement of the OCB.

Further exemplary, as in (a) of FIG. 11, the receiving device is according toThe upper limit P of the number of feedback information is calculated to be 2.

As shown in fig. 11 (b), corresponding to 8 PRBs (e.g., black filled PRBs) of 8 PSFCH transmissions, 5 PRBs in the comb 1 are used to transmit feedback information 1, PRB2 of the highest frequency band and PRB102 of the lowest frequency band in the comb 2 are used to transmit feedback information 3, and any 1 PRB (e.g., PRB 27) except for the PRBs of the highest frequency band and the lowest frequency band in the comb 3 is used to transmit feedback information.

Still further exemplary, if L is lower than the number of PRBs included in one comb, for example, l=3, the receiving device may follow the formulaThe upper limit of the number of the feedback information is calculated to be 1, for example, the feedback information is sent through the PRB of the highest frequency band, the PRB of the lowest frequency band and the other PRB of one comb tooth.

Corresponding to the above case 3, the receiving device sends feedback information, which may be implemented as: and sending feedback information through the PRB with the highest frequency band and the PRB with the lowest frequency band in the first comb teeth. That is, for a certain comb, only the highest PRB and the lowest PRB in the frequency band in the comb are occupied to send feedback information, and the rest PRBs of the comb do not send feedback information.

Exemplary, as shown in fig. 12, assuming that the upper limit of transmission times l=6, the upper limit of the number of comb teeth N available for transmitting feedback information _interlace 12, the upper limit of the number of feedback information that the receiving device can The PRB1 with the highest frequency band and the PRB101 with the lowest frequency band in the comb teeth 1 are used for transmitting the feedback information 1, the PRB2 with the highest frequency band and the PRB102 with the lowest frequency band in the comb teeth 2 are used for transmitting the feedback information 2, and the PRB5 with the highest frequency band and the PRB105 with the lowest frequency band in the comb teeth 3 are used for transmitting the feedback information 3.

In one aspect, in some scenarios, the receiving device does not feed back for each TB received, so the signaling overhead in the HARQ process can be reduced; on the other hand, the number of feedback information sent by the receiving device is smaller than or equal to the upper number limit P (P is determined according to the comb teeth parameter and the upper transmission number limit), so that the receiving device can transmit as much feedback information as possible when the upper transmission number limit and the comb teeth parameter are met, and therefore, the reliability of the HARQ process can be improved. In combination, the data transmission performance can be improved.

For example, it is assumed that the receiving apparatus feeds back 4 feedback information (i.e., p=4) at the same time at most, and the decoding results of 8 TBs received by the receiving apparatus are (1, 0,1, 0), respectively, where "1" corresponds to NACK and "0" corresponds to ACK. Then, the receiving apparatus feeds back 4 feedback information to the transmitting apparatus at most after receiving and decoding 8 TBs.

As a possible implementation manner, when the number of feedback information to be transmitted is greater than P, the receiving device may determine, according to the priority of the service type, P TBs with priority from high to low to transmit the feedback information.

In some embodiments of the present application, as shown in fig. 13, S104 may be implemented as: and S104a, the receiving equipment sends a cyclic shift sequence according to the parameters of the comb teeth and the upper limit of the transmission times, wherein the sequence is used for bearing or representing feedback information.

Several methods of determining the sequence are presented as follows:

method 1: the receiving device first determines a sequence pair from the available communication resources of the feedback channel and then determines the sequence from the determined sequence pair. Wherein the sequence may include, but is not limited to, a cyclic shift sequence.

In case the sequence is a cyclic shifted sequence, the sequence pairs are cyclic shifted pairs, one cyclic shifted pair comprising two cyclic shifted sequences. The following describes the technical solution of the embodiment of the present application by taking a sequence as a cyclic shift sequence and taking a sequence pair as a cyclic shift pair as an example, but the embodiment of the present application is not limited thereto.

Optionally, a cyclic shift pair is determined according to M-1 pieces of the feedback information corresponding to M-1 TBs in the M TBs, where the cyclic shift pair is used to carry the feedback information of the M-1 TBs. Each cyclic shift pair includes two cyclic shift sequences.

Optionally, the cyclic shift pair is determined according to the following formula: (P) _ID +M _ID +k’)mod N _CS The method comprises the steps of carrying out a first treatment on the surface of the Wherein P is _ID Representing source identity of physical layer, M _ID Representing propagation type-related parameters, k'N being parameters related to M-1 feedback information in the M feedback information _CS Representing the number of available cyclic shift pairs of the feedback channel, mod represents the modulo operator.

Optionally, in the multicast scenario, M _ID Is the identification of the receiving equipment, M in other scenes such as unicast and the like _ID May be 0. Alternatively, M _ID The value of (2) may also be determined otherwise according to the scene, without limitation.

Alternatively, the above formula (P _ID +M _ID +k’)mod N _CS It can also be replaced by the following form: (P) _ID +M _ID +k’*a)mod N _CS . Where α is used to space adjacent feedback channels in order to reduce correlation at channel detection.

The formula (P _ID +M _ID +k’*a)mod N _CS When a is 1, the above formula (P) _ID +M _ID +k’)mod N _CS 。

Alternatively to this, the method may comprise,wherein (1)>Representing a set of available resources of a feedback channel, N _clot Representing the number of timeslots occupied by the N TBs. Optionally, the available resources of the feedback channel include, but are not limited to, any one or more of the following: time domain resources, frequency domain resources, code domain resources.

For example, it is assumed that the receiving apparatus feeds back m=5 pieces of feedback information to the transmitting apparatus, 1 piece of feedback information corresponds to 1 bit, and 5 bits corresponding to 5 pieces of feedback information are 10111. First, the receiving apparatus determines a value k' of any M-1 pieces of feedback information among M pieces of feedback information. For example, as shown in fig. 14, the receiving apparatus determines the value of k ' from any M-1=4 bits of information (e.g., the first 4 bits of information 1011) (e.g., converts 1011 to a decimal value (11), the value 11 is taken as k '), and then the receiving apparatus substitutes the value of k ' as the above formula (P) _ID +M _ID +k’)mod N _CS And calculating a result, and determining a cyclic shift pair from available resources of a feedback channel according to the calculation result.

Here, taking the 1011 converted decimal value 11 as k ', in other embodiments, k ' may be determined according to the decimal value 11, or k ' may be determined in other manners, where the specific calculation manner of k ' is not limited in the embodiments of the present application, so long as it is guaranteed that k ' is associated with any M-1 bit information in M bits of information, so that the determined cyclic shift pair can carry or represent the M-1 bit information.

Wherein each cyclic shift pair may be used to represent a combination of bits. As shown in fig. 14, the bit combination of 4 bits is 2 in total ⁴ =16. Each bit combination may be represented by a cyclic shift pair. For example, bit combination 1011 may be represented by a cyclic shift pair a.

In this example, only one possible calculation mode of k 'is shown, and k' can be calculated by adopting other modes according to M-1 pieces of feedback information, which is not limited in the embodiment of the present application.

After determining the cyclic shift pair from the available resources of the feedback channel, the receiving device may determine a cyclic shift sequence from the determined cyclic shift pair. Optionally, the cyclic shift sequence is determined according to feedback information except for the M-1 feedback information in the M feedback information corresponding to the M TBs, and the cyclic shift sequence is used for carrying feedback information except for the M-1 feedback information in the M feedback information. Different cyclic shift sequences represent different feedback information.

Still referring to fig. 14, after determining a cyclic shift pair from the first 4 bit information 1011, the receiving apparatus determines a cyclic shift sequence from the determined cyclic shift pair from the last bit information. Taking the example of the receiving device determining the cyclic shift pair a (denoted CSA) from the available resources of the feedback channel, assuming that the CSA comprises a sequence A1 (denoted SeqA 1) and a sequence A2 (denoted SeqA 2), in one example the last bit information is 1, the receiving device determines to use SeqA1. If the last bit information is 0, the receiving device determines to use SeqA2.

In a further example, the last bit information is 1, the receiving device determines to use SeqA2, i.e. 1 is represented by SeqA 2. In this way, after the transmitting device receives SeqA2 from the receiving device, it can be known that the last bit in the feedback information is 1. If the last bit information is 0, the reception apparatus determines to use SeqA1, and indicates 0 by SeqA 1.

It should be noted that, in the embodiment of the present application, a specific correspondence between feedback information and a cyclic shift sequence is not limited.

Method 2: and the cyclic shift sequence is determined according to M pieces of feedback information corresponding to the M pieces of TB, and the cyclic shift sequence is used for bearing the M pieces of feedback information.

In this implementation, the concept of cyclic shift pairs is no longer being followed and the receiving device may directly determine the cyclic shift sequence. Different cyclic shift sequences represent different bit combinations. Different bit combinations represent different decoding situations. Illustratively, cyclic shift sequence 1 represents bit combination a, cyclic shift sequence 2 represents bit combination B, cyclic shift sequence 3 represents bit combination C, and so on. In this way, after the transmitting apparatus receives the cyclic shift sequence from the receiving apparatus, the decoding condition of the receiving apparatus can be determined according to the correspondence between the cyclic shift sequence and the bit combination.

Optionally, the cyclic shift sequence is determined according to the following formula: wherein P is _ID Representing source identity of physical layer, M _ID Representing parameters related to propagation type, k being parameters related to said M feedback information,/>Indicating the number of available cyclic shift sequences of the feedback channel,/->The number of available PRBs representing the feedback channel, b, is related to the number of sequences used within one PRB.

Alternatively to this, the method may comprise,it can be understood that one cyclic shift pair contains two cyclic shift sequences, and thus the number of available cyclic shift sequences is: />

Alternatively, b=12/Δ. Where Δ represents the interval between available cyclic shift sequences.

Alternatively, the above formulaIt can also be replaced by the following form:

for example, as shown in fig. 15, assuming that the receiving apparatus feeds back m=5 bits, the 5 bits being 10111, respectively, to the transmitting apparatus, the receiving apparatus needs to calculate the value of k from the 5 bits of 10111, for example, convert 10111 into decimal number 23 and take 23 as k, or determine the value of k from decimal number 23. Then, k is substituted into the above formula A cyclic shift sequence for carrying feedback information is calculated.

The method 1 and the method 2 mainly use the case that the cyclic shift sequence is a short sequence as an example to describe the method for determining the cyclic shift sequence, and in other embodiments (corresponding to the method 3), the cyclic shift sequence may also be a long sequence.

Wherein, the short sequence may refer to a sequence occupying one PRB. A long sequence may refer to a sequence occupying multiple PRBs. Alternatively, the long sequences include, but are not limited to, the following: a sequence occupying part or all of PRBs in one comb tooth, and a sequence occupying a plurality of PRBs in a plurality of comb teeth.

Method 3: the feedback information is represented using a long sequence. Alternatively, the number of resources occupied by the long sequence may be determined according to the number of PRBs, for example, the available PRBs of the feedback channel is 10, and then the long sequence may occupy all REs (for example, 120 REs) on the 10 PRBs. In the long sequences of 120 candidates corresponding to the 120 REs, according to the aboveOr (b)Determining the sequence. Wherein k is determined according to M feedback information, < >>I.e. the number of available long sequences of the feedback channel is 120.

After determining the cyclic shift sequence for representing the feedback information, the receiving device transmits the cyclic shift sequence to the transmitting device through the comb teeth. After the transmitting device receives the cyclic shift sequence, the decoding condition of the receiving device may be determined according to the cyclic shift sequence.

By way of example, fig. 16 gives an example of a cyclic shift sequence transmitted by a receiving device. Let 5 bits corresponding to 5 feedback information be 10111, wherein 1 corresponds to NACK and 0 corresponds to ACK. Illustratively, the receiving device may determine k 'from 4 bits (e.g., the 2 nd to 5 th bits) 0111 of the 5 bits and determine the cyclic shift pair to use from k'. Next, from the remaining 1 bit (e.g., bit 1), the cyclic shift sequence used is determined from the cyclic shift pair. Similarly, k 'is determined from 4 bits (e.g., 1 st bit, 3 rd bit-5 th bit) 1111 out of the 5 bits, and the cyclic shift pair used is determined from k'. Next, from the remaining 1 bit (e.g., bit 2) of the 5 bits, the cyclic shift sequence used is determined from the cyclic shift pair. And so on, determining the sequence for carrying each bit and transmitting each sequence on the corresponding comb teeth.

In the above embodiment, several calculation modes of a value range (i.e., upper limit of number) of the feedback information number are mainly given from the point of view of comb structure. In other embodiments of the present application, the range of values of the feedback information number may also be given from other angles.

Optionally, the value range of the feedback information number is calculated from the resource perspective. Optionally, to ensure that there is sufficient cyclic shift sequence to represent feedback information. The value range of M meets the following conditions: 2 ^M-1 ≤N _CS (inequality one); and/or, the following condition is satisfied: 2 ^M ≤N _seq (inequality two).

Wherein N is _CS Representing an upper limit on the number of available cyclic shift pairs for the feedback channel, each cyclic shift pair comprising two cyclic shift sequences. N (N) _seq Representing an upper limit on the number of available cyclic shift sequences.

Alternatively to this, the method may comprise,wherein (1)>Representing a set of available resources of a feedback channel, N _slot Representing the number of timeslots occupied by the N TBs.

Briefly, M is defined by Ncs and/or N _seq Determining, i.e. satisfying, ncs and/or N _seq The maximum value of (2) is taken as M.

Illustratively, the upper limit (N _CS ) 15 is taken as an example, and in order to ensure that the feedback information can be correctly represented, the number M of feedback information is at most 4.

In some examples, the receiving device receives the feedback information according to 3 of the m=4 feedback informationThe cyclic shift pair is determined (e.g., the first 3 feedback information). In this process, it is necessary to ensure that the number of available cyclic shift pairs is greater than 2 ³ Since the upper limit of the number of cyclic shift pairs is 15, satisfying 15 > 8, =8, it can be ensured that there are sufficient available cyclic shift pairs to represent or carry 3 feedback information. Thereafter, the reception apparatus determines a cyclic shift sequence from the determined cyclic shift pair according to the remaining 1 feedback information (such as the last feedback information) among the m=4 feedback information.

In the embodiment of the present application, the value range of M may be determined in any manner as follows:

mode 1: the transmitting device transmits indication information to the receiving device; the indication information is used for indicating the value range of M. Alternatively, the indication information may be an explicit indication of the value range of M, or may implicitly indicate the value range of M.

Alternatively, the indication information may be a radio resource control (radio resource control, RRC) message. For example, the upper limit of M may be configured in an RRC message.

Optionally, the indication information is further used to indicate a time domain end position of the N TBs (for example, a time slot in which a last TB of the N TBs is located). Therefore, the receiving device can determine that M pieces of feedback information need to be fed back to the sending device according to the time domain end positions of the N pieces of TB. The indication information may be carried over a control channel. Optionally, the transmitting device sends indication information to the receiving device through the control channel, indicating the time domain position of each TB (e.g., the time slot of each TB). Or, alternatively, the transmitting device transmits indication information to the receiving device through the control channel, indicating the upper limit of M.

Optionally, the transmitting device sends the indication information on the time slot of the mth TB through the control channel or the data channel, and the receiving device obtains the value range of M after receiving the indication information from the time slot of the mth TB. For example, the transmitting device transmits the indication information in the time slot where the 3 rd TB is located, and after the receiving device receives the indication information, it determines that the upper limit of M is 3.

Optionally, the receiving device may further determine the position of the feedback channel according to the time domain end positions of the N TBs.

Mode 2: the transmitting device transmits N TBs to the receiving device, and the receiving device may determine that M feedback information needs to be fed back to the transmitting device according to the N TBs and the periodicity of the PSFCH. Assuming that the PSFCH period is 4 slots and the time interval between the PSFCH and the PSSCH is 2, feedback may be made for TBs received in the 4 slots n-1 through n-4 in slot n+2. For example, if the transmitting device transmits a total of 6 TBs to the receiving device in time slots n-2, n-3, and n-4, the receiving device may determine that 6 feedback information needs to be fed back for 6 TBs in time slot n+2, i.e., determine that the value of M is 6, according to the periodicity of the PSFCH.

The above description will be given mainly with respect to determining PRBs for transmitting feedback information in the comb teeth from the point of view of comb teeth parameters. In other embodiments of the present application, PRBs used for transmitting feedback information in the comb teeth may also be determined from a resource perspective. As one possible implementation manner, the number of PRBs used for transmitting feedback information in the comb teeth is multiple, and the feedback information is repeatedly transmitted on the multiple PRBs in the comb teeth. In the scheme of carrying feedback information by using the cyclic shift sequence, the feedback information is repeatedly transmitted on a plurality of PRBs in the comb teeth, which means that the cyclic shift sequence is repeatedly transmitted on a plurality of PRBs in the comb teeth. Number of repeated transmissions of cyclic shift sequence R _repetition The following conditions are satisfied:

wherein, the liquid crystal display device comprises a liquid crystal display device,representing the set of available resources of the feedback channel, +.>Indicating the number of sub-channels occupied by the feedback channel, < + >>Represents the number of cyclic shift pairs>The number of PRBs of the feedback channel on one slot of one subchannel is represented.

Alternatively to this, the method may comprise,wherein (1)>A set of available PRBs representing a feedback channel, +.>Determined according to the parameter sl-PSFCH-Period, N _subch Indicating the number of subchannels available for the feedback channel.

In this way, the cyclic shift sequence is repeatedly transmitted on a plurality of PRBs, so that the transmission requirement of OCB can be met, the communication bandwidth of the terminals is ensured, and meanwhile, the terminals can be conveniently mutually detected.

Optionally, cyclic shift hopping (cyclic shift hopping), i.e., R, may be performed when the cyclic shift sequence is repeatedly transmitted _repetition In the secondary transmission, a phase difference exists between the cyclic shift sequence used for the ith transmission of feedback information and the cyclic shift sequence used for the (i+1) th transmission of feedback information. Wherein i is a positive integer. In this way, the peak-to-average power ratio (peak to average power ratio, PAPR) of the cyclic shift sequence transmitted by the receiving device can be reduced as much as possible, and the communication performance of the receiving device can be improved.

After determining the value range of the number of feedback information, the receiving device may determine the number of feedback information to be transmitted to the transmitting device according to the value range of the number of feedback information, and transmit the feedback information accordingly.

Alternatively, considering that in normal communication scenarios, the TB that fails to decode is generally less than the TB that fails to decode, for example, in some scenarios, the success rate of data transmission is as high as 90%, so the receiving device may send feedback information (such as NACK) for the TB that fails to decode as much as possible according to the value range of the number of feedback information. In this way, after receiving NACK for the TB whose decoding failed, the transmitting apparatus can infer that the decoding result of the other TBs is decoding success. That is, a TB that does not feedback the decoding result may be regarded as a successfully decoded TB. In the scheme, because more NACK is fed back and ACK is not sent or less ACK is fed back, the quantity of feedback information can be reduced, and the signaling overhead is reduced.

In some embodiments, it is assumed that the number of TBs that fail decoding among the N TBs received by the receiving apparatus is S.

And under the condition that S is more than or equal to P, the M TB is P TB which fails decoding in the N TB, and the feedback information corresponding to the M TB is NACK for the P TB. That is, when there are more TBs that fail to decode, the receiving apparatus transmits feedback information for the TB that fails to decode to the transmitting apparatus as much as possible, and the receiving apparatus feeds back feedback information for the first P TBs that fail to decode to the transmitting apparatus at most, considering that the upper limit of the number of feedback information is P.

For the TB whose P-th decoding result is NACK, the decoding results of the rest TBs are ACKs except for the TBs whose decoding result is NACK among all TBs before the TB.

For example, as shown in fig. 17, the receiving apparatus receives 8 TBs from the transmitting apparatus, wherein 3 TBs (s=3) are failed in decoding, 5 TBs are successfully decoded, and assuming that the upper limit of the number of feedback information p=2, the receiving apparatus feeds back NACK for the previous p=2 failed TBs to the transmitting apparatus at most. For example, the receiving device feeds back a NACK for tb#1 to the transmitting device, and transmits a NACK for tb#3. Among the TBs (i.e., tb#3) whose decoding result is NACK, all TBs preceding the tb#3 except for tb#1 whose decoding result is NACK, the decoding results of the remaining TBs are ACK, i.e., the decoding result of tb#2 is ACK.

Optionally, in this case, after the transmitting device receives the feedback information, when retransmitting the TB, the P decoding results are NACK before retransmitting the TB.

Assuming that the TB whose P-th decoding result is NACK is called the target TB, the transmitting device needs to retransmit the TB after the target TB because the receiving device does not feed back the decoding result of the TB after the target TB.

Illustratively, as shown in fig. 17, in a certain transmission of data, the transmitting apparatus transmits 8 TBs to the receiving apparatus and receives decoding results NACK for tb#1 and tb#3 from the receiving apparatus. The transmitting device may infer that the decoding result of tb#2 is ACK from the received NACKs for tb#1 and tb#3. Thereafter, the transmitting apparatus needs to retransmit tb#1 and tb#3, for which the decoding result is known and the decoding fails, and also needs to retransmit tb#4 to tb#8, for which the decoding result is not known.

For example, assuming that the upper limit p=4 of the number of feedback information of the receiving device and the decoding result of the received 8 TBs is (1,0,1,0,1,1,0,1), the receiving device is limited to feeding back at most 4 feedback information, and feeds back NACKs corresponding to the 1 st, 3 rd, 5 th and 6 th TBs. According to the NACK of the four TBs, the transmitting device may learn that the decoding result of the 2 nd and 4 th TBs is ACK. Since the receiving apparatus feeds back only to the 6 th TB, the transmitting apparatus does not know the decoding results of the 7 th and 8 th TBs, and upon subsequent retransmission, the transmitting apparatus needs to retransmit the 7 th and 8 th TBs in addition to the TBs #1, TB #3, TB #5, TB #6 for which the decoding results were known and the decoding failed.

Further exemplary, when all decoding results are ACK, the receiving device feeds back ACK corresponding to 8 th TB.

Or in the case of S < P, the M TBs include the S TBs, and the feedback information corresponding to the M TBs includes NACKs for the S TBs. That is, when there are few TBs that fail decoding (less than the upper limit P of the number of feedback information), the receiving apparatus may feedback NACK for all the TBs that fail decoding to the transmitting apparatus.

For example, it is assumed that the transmitting apparatus and the receiving apparatus both know the upper limit p=2 of the number of feedback information, and as shown in fig. 18, the receiving apparatus receives 8 TBs from the transmitting apparatus. Wherein, 1 TB (tb#4) fails to decode, and the number of TBs failing to decode is less than the upper limit P of the number of feedback information, the receiving device feeds back NACK for all TBs failing to decode, i.e., feeds back NACK of tb#4, to the transmitting device. After the transmitting apparatus receives NACK for tb#4 from the receiving apparatus, it may determine that only tb#4 of 8 TBs fails to be decoded and that the remaining TBs are successfully decoded according to the decoding situation of tb#4 and the upper limit P of the number of feedback information. Therefore, in the technical scheme of the embodiment of the application, the receiving device can enable the sending device to acquire the decoding condition of the receiving device by feeding back less NACK to the sending device, so that the signaling overhead in the transmission process can be reduced. After determining the decoding condition of each TB, the transmitting end retransmits the TB #4 that failed decoding to the receiving device.

For example, assuming that the transmitting device knows that the receiving device feeds back 4 PSFCHs (i.e., 4 pieces of feedback information) at the same time at most, and that the transmitting device receives NACKs for the 1 st TB and the 4 th TB and does not receive feedback information for other TBs, it may know that the decoding results of the other 6 TBs are all ACKs. After determining the decoding condition of each TB, the transmitting apparatus retransmits the tb#1 and tb#4, for which decoding failed, to the receiving apparatus.

Still further exemplary, assuming that the transmitting device does not know the upper limit p=2 of the number of feedback information, still as in fig. 18, the receiving device receives 8 TBs from the transmitting device. Wherein, 1 TB (tb#4) fails to decode, and the number of TBs failing to decode is less than the upper limit P of the number of feedback information, the receiving device feeds back NACK for all TBs failing to decode, i.e., feeds back NACK of tb#4, to the transmitting device. After receiving NACK for tb#4 from the receiving device, the transmitting device retransmits the decoding-failed tb#4 and all TBs after the decoding-failed TB, i.e., tb#5 to tb#8, to the receiving device.

Optionally, as shown in fig. 19, the receiving device may further feed back an ACK or NACK for the last TB of the N TBs to the transmitting device so as to identify the last TB, which indicates that before the last TB, the decoding results of the remaining TBs are all ACKs except for the TB for which the NACK is fed back.

For another example, in the case of S < P, the receiving apparatus feeds back feedback information of S TBs failing in decoding and ACK/NACK corresponding to the last TB among the N TBs to the transmitting apparatus. For example, the NACK of the 1 st TB, the NACK of the 5 th TB, and the ACK of the 8 th TB are fed back to indicate the end position of the TB received by the receiving device, and indicate that the decoding results of the rest of TBs except for the TB for which the NACK was fed back before the TB are all ACKs. In this scheme, the transmitting device may retransmit the TB that fails decoding during retransmission.

In some embodiments, if all the N TBs received by the receiving device are successfully decoded, the M TBs are the last TB of the N TBs, and the feedback information corresponding to the M TBs is an ACK for the last TB. That is, as shown in fig. 20, in case that all TBs are successfully decoded, the receiving apparatus feeds back ACK of the last TB (e.g., TB # 8) of the N TBs to the transmitting apparatus.

In the above embodiments, taking as an example whether the transmitting device knows the upper limit P of the number of feedback information and determines the decoding result of the receiving device according to the situation, in other embodiments, whether the transmitting device knows P is not paid attention to any more, after receiving feedback information of M TBs from the receiving device, the transmitting device directly determines the decoding states of all TBs before the TB according to the TB corresponding to the last feedback information in the M feedback information, and the decoding result of the TB after the TB is regarded as unknown, and retransmits the TB with unknown decoding result at the time of retransmission. Optionally, in all TBs before the last TB, the decoding result of the TB with feedback information is NACK, and the decoding result of the TB without feedback information is ACK.

In the related art, if the upper limit p=2 of the number of feedback information is set, feedback can only be performed for the decoding cases of 2 TBs, for example, only the decoding success cases of tb#1 and tb#2 can be fed back, and the decoding cases of tb#3 to tb#8 cannot be fed back. For example, in some examples, as shown in fig. 18, the receiving device sends only 1 NACK for tb#4 to the transmitting device, so that the transmitting device knows that the receiving device decodes the remaining TBs, and the signaling overhead in the transmission process is small. That is, with less feedback information (e.g., only the feedback information of tb#4), more decoding results of TBs (e.g., decoding results of tbs#1-tb#8) can be carried.

Example two

As shown in fig. 21, the embodiment of the present application further provides a data transmission method, which includes the following steps:

s201, the transmitting device transmits N TBs to the receiving device. Accordingly, the receiving apparatus receives N TBs from the transmitting apparatus. Wherein N is a positive integer.

S202, the receiving device decodes the N TB.

The specific implementation manner of step S202 may be referred to S103, which is not described herein.

S203, the receiving device sends a sequence associated with feedback information of M TB in the N TB according to the decoding result of the N TB.

That is, the receiving device transmits feedback information, which may be implemented as: the receiving device transmits the sequence. The sequence is determined according to feedback information of M TB, and the sequence is used for representing the feedback information of the TB. Since the sequence is determined according to feedback information of the M TBs and may represent feedback information of the M TBs, after the transmitting device receives the sequence from the receiving device, it may be determined that the feedback information of the receiving device is ACK/NACK according to an association relationship of the sequence and the feedback information, so as to determine a decoding situation of the receiving device.

The sequence is determined according to feedback information of M TBs, and there are two ways. In one way, a cyclic shift pair is determined according to M-1 pieces of feedback information corresponding to M-1 pieces of TB in the M pieces of TB, where the cyclic shift pair is used for carrying the feedback information of the M-1 pieces of TB. And determining a cyclic shift sequence according to feedback information except the M-1 pieces of feedback information in M pieces of feedback information corresponding to the M pieces of TB. The cyclic shift sequence is used for carrying feedback information except the M-1 feedback information in the M feedback information. In another way, a cyclic shift sequence is determined directly according to M pieces of feedback information corresponding to M TBs, where the cyclic shift sequence is used to carry the M pieces of feedback information. For the specific implementation of the two ways of determining the cyclic shift sequence, reference may be made to the related steps (e.g. step S104 a) in the first embodiment, which is not described herein.

Optionally, the time slots of the plurality of PSFCHs are determined according to the time slot of the last one or more PSSCHs. Alternatively, the time slots of the plurality of feedback information are determined based on the time slot of the last one or more TBs. For the effectiveness of the feedback, it is necessary to ensure that the time slot of the last TB transmitted by the transmitting device is at least T time slots apart from the time slot of the feedback channel. Illustratively, as in fig. 20, after receiving the last tb#8, the receiving device transmits feedback information to the transmitting device through a feedback channel at least after T slots.

Alternatively, the time interval T relates to a subcarrier interval, and the time interval t=1 slot when the subcarrier interval is 15kHz, for example.

Optionally, in some embodiments, before executing S203, the receiving device may further determine a value range of M, and feed back, according to the value range of M and decoding results of the N TBs, a sequence associated with feedback information of the M TBs in the N TBs to the sending device.

As a possible implementation manner, when the receiving device adopts the comb teeth to transmit the feedback information, the upper limit P of the number of the feedback information can be determined according to the comb teeth parameters, and M needs to be smaller than or equal to P. For specific calculation of P, see the related steps (e.g. step S104) of the first embodiment.

As a possible implementation manner, when the receiving device adopts the comb teeth to transmit data, or does not adopt the comb teeth to transmit data, the receiving device can determine the value range of M according to the communication resource. For example, the value range of M satisfies the following conditions: 2 ^M ^-1 ≤N _CS The method comprises the steps of carrying out a first treatment on the surface of the And/or, the following condition is satisfied: 2 ^M ≤N _seq . The meaning of each parameter in the two formulas can be referred to the related description of the first embodiment, and will not be repeated.

Optionally, in some embodiments, the receiving device sends the feedback information using the comb teeth, which may be implemented as: and sending feedback information through part or all PRBs of the comb teeth. By way of example, by means of comb teethThe PRBs transmit feedback information. Or, by the +.>Sending feedback messages by PRBAnd (5) extinguishing. Or, feedback information is sent through at least the PRB of the highest frequency band and the PRB of the lowest frequency band of the comb teeth.

Optionally, in some embodiments, it is assumed that the number of TBs that fail decoding among the N TBs is S; and under the condition that S is more than or equal to P, the M TB is P TB which fails decoding in the N TB, and the feedback information corresponding to the M TB is NACK for the P TB. Meaning that when there are more TBs that fail decoding (more than the upper limit P of the number of feedback information), the receiving apparatus feeds back feedback information for the top P TBs that fail decoding at most. Or, in the case of S < P, the M TBs include the S TBs, and the feedback information corresponding to the M TBs includes NACKs for the S TBs. Meaning that the receiving device may feedback NACKs for all the failed TBs when there are fewer TBs that fail decoding (less than the upper limit P of the number of feedback information).

Optionally, in some embodiments, if all the N TBs are decoded successfully, the M TBs are the last TB of the N TBs, and the feedback information corresponding to the M TBs is an ACK for the last TB. Meaning that in case that all of the N TBs are successfully decoded, the receiving apparatus feeds back one ACK for only the last TB among the N TBs.

S204, the sending device determines a decoding result of the receiving device according to the sequence.

As a possible implementation manner, the transmitting device performs correlation detection on the 2M-1 cyclic shift pairs, and determines a cyclic shift sequence with a correlation degree higher than a threshold and highest from the cyclic shift pairs, so as to determine specific values of M feedback information represented by the cyclic shift sequence.

For example, if m=3, that is, the receiving device feeds back feedback information for 3 TBs to the transmitting device, the transmitting device needs to perform correlation detection on 23=8 cyclic shift sequences in 23-1=4 cyclic shift pairs in order to determine a decoding result of the receiving device.

Example III

As shown in fig. 22, the embodiment of the present application further provides a data transmission method, including:

s401, the transmitting device transmits N TBs to the receiving device. Accordingly, the receiving apparatus receives N TBs from the transmitting apparatus. Wherein N is a positive integer.

S402, the receiving device decodes the N TB.

The specific implementation manner of step S402 may be referred to S103, which is not described herein.

S403, according to the decoding results of the N TB, the receiving equipment sends feedback information through the PRBs of the comb teeth.

Wherein, the occupied PRB is determined according to feedback information. That is, in this scheme, the receiving device may determine PRBs used for transmitting feedback information in one comb according to one or more feedback information, and transmit the feedback information through the determined PRBs. In this case, after the transmitting device receives the feedback information, the transmitting device may learn specific feedback information according to the PRBs occupied in the comb teeth.

For example, as shown in fig. 23, assuming that the comb teeth include 5 PRBs, feedback NACK when 4 PRBs occupying the highest frequency band is specified, and feedback ACK when 4 PRBs occupying the lowest frequency band is specified, the transmitting device may learn that the feedback information is 10111 after receiving the feedback information on the 5 comb teeth as shown in fig. 23.

Optionally, the sequences on the PRBs of the highest frequency band and the lowest frequency band of the comb teeth are used for carrying or indicating 1 feedback information in the M feedback information, and except for the 1 feedback information, it may be determined whether to occupy the rest of PRBs except for the PRBs of the highest frequency band and the lowest frequency band according to rest or all feedback information except for the 1 feedback information in the M feedback information.

Illustratively, the comb teeth include PRB1, PRB26, PRB51, PRB76, and PRB101. The sequences on the PRB1 and PRB101 of the comb teeth are used to carry or indicate 1 feedback information of M feedback information, and the rest or all feedback information except the 1 feedback information in the M feedback information is used to determine whether to occupy the PRB26, PRB51, and PRB76. For example, 2 pieces of feedback information among other feedback information are 00, which means that the PRB26 and the PRB51 are occupied, 2 pieces of feedback information are 01, which means that the PRB51 and the PRB76 are occupied, 2 pieces of feedback information are 10, which means that the PRB26 and the PRB76 are occupied, and other 2 pieces of feedback information are 11, which means that the PRB51, the PRB76 and the PRB101 are occupied.

In the second embodiment, the feedback information is represented or carried or indicated by a sequence, and the meaning of the feedback information is different when different sequences or pairs of sequences are used, and in the third embodiment, the feedback information is represented or carried or indicated by a PRB, and the meaning of the feedback information is different when different PRBs of the comb teeth are occupied.

In other embodiments, feedback information may also be represented or carried or indicated jointly based on PRBs and sequences. For example, the same occupies the first 4 PRBs of the comb 1 and the comb 2, and when the sequence 1 is transmitted by the first 4 PRBs of the comb 1, feedback NACK is indicated, and when the sequence 2 is transmitted by the first 4 PRBs of the comb 2, feedback ACK is indicated. For another example, feedback ACK is indicated by the first 4 PRB feedback sequences 3 of the comb teeth 3, and feedback NACK is indicated by the last 4 PRB feedback sequences 3 of the comb teeth 4.

Example IV

As shown in fig. 24, the embodiment of the present application further provides a data transmission method, including:

s301, the transmitting device transmits N TBs to the receiving device. Accordingly, the receiving apparatus receives N TBs from the transmitting apparatus. Wherein N is a positive integer.

S302, the receiving device decodes the N TB.

The specific implementation manner of step S302 may be referred to S103, which is not described herein.

And S303, the receiving equipment sends feedback information to the sending equipment according to the decoding results of the N TB.

S303 may include the following:

s303a, according to the decoding results of the N TBs, under the condition that S is more than or equal to P, the receiving equipment sends NACK of P TBs with failed decoding in the S TBs.

Where S is the number of TBs of the N TBs that fail decoding. P is the upper limit of the number of feedback information. The calculation method of P can be referred to the related description in the first embodiment, and will not be repeated here.

Meaning that when there are more TBs that fail decoding (more than the upper limit P of the number of feedback information), the receiving apparatus feeds back feedback information for the top P TBs that fail decoding at most.

Optionally, under the condition that S is more than or equal to P, the value range of P meets the following conditions: 2 ^P-1 ≤N _CS And/or the following conditions are satisfied: 2 ^P ≤N _seq . That is, it is necessary to ensure that the available sequence is sufficient to represent P NACKs.

S303b, according to the decoding results of the N TBs, in the case of S < P, the receiving device transmits NACKs of the S TBs of the N TBs.

Meaning that the receiving device may feedback NACKs for all the failed TBs when there are fewer TBs that fail decoding (less than the upper limit P of the number of feedback information).

Optionally, at S<In the case of P, the value range of S satisfies the following conditions: 2 ^S-1 ≤N _CS . That is, it is necessary to ensure that the available sequence is sufficient to represent S NACKs.

Optionally, as in the case of fig. 19, s < p, the receiving device may also feed back an ACK or NACK for the last TB of the N TBs to the transmitting device, so as to identify the last TB, which indicates that before the last TB, the decoding results of the remaining TBs are all ACKs except for the TB for which the NACK is fed back.

And S303c, according to the decoding results of the N TB, the receiving equipment sends the ACK of the last TB in the N TB when the N TB is successfully decoded.

Meaning that in case that all of the N TBs are successfully decoded, the receiving apparatus feeds back one ACK for only the last TB among the N TBs.

Alternatively, in some embodiments, the receiving device sends the feedback information, which may be implemented as: and sending feedback information through part or all PRBs of the comb teeth. By way of example, by means of comb teeth The PRBs transmit feedback information. Or, by the +.>The PRBs transmit feedback information. Or, feedback information is sent through at least the PRB of the highest frequency band and the PRB of the lowest frequency band of the comb teeth.

Alternatively, in some embodiments, the receiving device sends the feedback information, which may be implemented as: and transmitting a sequence, wherein the sequence is used for bearing or representing feedback information. The two ways of determining the sequence may be referred to the related description of the first embodiment, and will not be repeated. For example, in the case that S is greater than or equal to P, the receiving device may determine a sequence pair according to P-1 feedback information among the P feedback information, and determine a sequence from the determined sequence pair according to 1 feedback information other than the P-1 feedback information among the P feedback information. Alternatively, the receiving device may directly determine the sequence from the P feedback information. Further exemplary, in case of S < P, the reception apparatus may determine a sequence pair from S-1 feedback information among S feedback information, and determine a sequence from the determined sequence pair from 1 feedback information other than the S-1 feedback information among the S feedback information. Alternatively, the receiving device may directly determine the sequence based on the S feedback information.

Example five

The above-mentioned method for calculating CBR may sense the RSSI of the sub-channel from the second symbol within 100ms and calculate CBR according to the sensed result. Such CBR calculation is applicable to frame or slot based devices or systems (such as NR) to calculate CBR. After introducing unlicensed spectrum, the above mentioned CBR calculation is risky, since unlicensed spectrum may not be a spectrum in other systems based on frames or time slots, such as Wi-Fi, which is not transmitted in the time slot structure of NR.

Considering that the NR system and the Wi-Fi system are not synchronous systems, the time slot structures are not known to each other, and the above CBR calculation scheme is not applicable any more, the embodiment of the application provides a new CBR determination method. The method can be used in PSSCH, PSCCH, PSFCH and other transmission scenes. After calculating the CBR value, it may be determined whether to perform corresponding data or signaling transmission according to the CBR value.

As one possible implementation, CBR may be calculated according to the following formula:

wherein, the liquid crystal display device comprises a liquid crystal display device,indicates the number of busy subchannels in the time window, < +.>Representing the number of total subchannels within the time window. All the subchannels include the above-mentioned busy subchannels and idle subchannels. Wherein (1)>Indicating the number of free subchannels within the time window.

The above time window may also be referred to as a CBR window (window).

In the embodiment of the present application, the busy subchannel is associated with a time unit, and the subchannel is busy, which means that the subchannel is busy in a certain time unit. Time units, including but not limited to, sensing slots (sensing slots) of unlicensed spectrum. Taking the perceived time slot as an example, the duration of one perceived time slot can be, for example, but not limited to, 9us, and the terminal performs statistics with 9us as the time granularityAnd +.>

Illustratively, as in fig. 25, subchannel 1 is busy in perceived time slot 2, perceived time slot 5, and so on, the busy subchannel includes: subchannel 1 in perceived time slot 2, subchannel 1 … in perceived time slot 5, and subchannel 4 in perceived time slot 5, for a total of 6 busy subchannels.

Optionally, in order to avoid power consumption of the terminal caused by sensing a time unit (such as 9us sensing a time slot) in the process of calculating the CBR, the terminal may access through Type1 (i.e. LBT access), multiplex a time slot sensing result in the process of Type1 access, and calculate the CBR according to the sensing result. Therefore, the terminal can avoid extra perception time slots by multiplexing the time slot perception result in the Type1 access process, thereby avoiding extra perception power consumption.

As a possible implementation manner, in the Type1 access process, the terminal decides to access by monitoring whether the channel is idle, and if the channel is busy, the terminal is retracted for a certain time to access. Optionally, the duration of the backoff is one sensing time slot V.

In the back-off period, the terminal needs to continuously detect whether each sensing time slot is busy, and if an idle sensing time slot (idle slot) is detected, the back-off number is reduced by one until the back-off number reaches 0, which indicates that the channel is idle, and the terminal accesses the channel. For a specific Type1 access manner, refer to related technologies, and are not described herein again.

Statistics when the Type1 access mode exists in the time window rangeAnd +.>Calculating CBR according to the statistical result, and not counting ++when the Type1 access mode does not exist>And +.>CBR is not calculated.

As shown in FIG. 26, multiple Type1 accesses can be performed within a time window, and statistics can be performed each time Type1 accessesAnd +.>And calculates CBR based on the statistics.

The fifth embodiment can be combined with any of the first to fourth embodiments described above. And when the CBR is determined to meet the condition, the transceiver transmits data or signaling.

It should be noted that some operations in the flow of the above-described method embodiments are optionally combined, and/or the order of some operations is optionally changed. The order of execution of the steps in each flow is merely exemplary, and is not limited to the order of execution of the steps, and other orders of execution may be used between the steps. And is not intended to suggest that the order of execution is the only order in which the operations may be performed. Those of ordinary skill in the art will recognize a variety of ways to reorder the operations described herein. In addition, it should be noted that details of processes involved in a certain embodiment herein apply to other embodiments as well in a similar manner, or that different embodiments may be used in combination.

Illustratively, in each drawing, there is no limitation on the execution order between step S102 and step S103.

Moreover, some steps in method embodiments may be equivalently replaced with other possible steps. Alternatively, some steps in method embodiments may be optional and may be deleted in some usage scenarios. Alternatively, other possible steps may be added to the method embodiments.

Moreover, the method embodiments described above may be implemented alone or in combination.

It may be understood that, in order to implement the above-mentioned functions, the network element in the embodiments of the present application includes corresponding hardware structures and/or software modules that perform each function. The various example units and algorithm steps described in connection with the embodiments disclosed herein may be embodied as hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation is not to be considered as beyond the scope of the embodiments of the present application.

The embodiment of the application may divide the functional units of the network element according to the above method example, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated units may be implemented in hardware or in software functional units. It should be noted that, in the embodiment of the present application, the division of the units is schematic, which is merely a logic function division, and other division manners may be implemented in actual practice.

Fig. 27 shows a schematic block diagram of a communication apparatus provided in an embodiment of the present application, which may be the above-described receiving device or transmitting device. The communication apparatus 1700 may exist in the form of software or may be a chip usable for a device. The communication apparatus 1700 includes: a processing unit 1702 and a communication unit 1703. Alternatively, the communication unit 1703 may be further divided into a transmission unit (not shown in fig. 27) and a reception unit (not shown in fig. 27). Wherein, the sending unit is configured to support the communication apparatus 1700 to send information to other network elements. A receiving unit, configured to support the communication apparatus 1700 to receive information from other network elements.

Optionally, the communication device 1700 may further include a storage unit 1701 for storing program codes and data of the communication device 1700, and the data may include, but is not limited to, raw data or intermediate data, etc.

If the communication apparatus 1700 is a receiving device, the processing unit 1702 may be configured to support the receiving device to perform processes such as S102, S103, etc. in fig. 6, and/or other processes for the schemes described herein. The communication unit 1703 is configured to support communication between the receiving apparatus and other network elements (e.g., the transmitting apparatus and the like described above), for example, support the receiving apparatus to perform S101, S104 and the like in fig. 6.

If the communication apparatus 1700 is a transmitting device, the processing unit 1702 may be configured to support the transmitting device to perform S204 in fig. 21, and/or other processes for the schemes described herein. The communication unit 1703 is configured to support communication between the transmitting apparatus and other network elements (e.g., the receiving apparatus described above, etc.), for example, support the transmitting apparatus to perform S203 in fig. 21, etc.

In one possible approach, the processing unit 1702 may be a controller or the processor 401 and/or the processor 407 shown in fig. 5, such as a central processing unit (Central Processing Unit, CPU), general purpose processor, digital signal processing (Digital Signal Processing, DSP), application specific integrated circuit (Application Specific Integrated Circuit, ASIC), field programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, transistor logic device, hardware component, or any combination thereof. Which may implement or perform the various exemplary logic blocks, modules, and circuits described in connection with this disclosure. A processor may also be a combination that performs computing functions, e.g., including one or more microprocessors, a combination of a DSP and a microprocessor, and so forth.

In a possible manner, the communication unit 1703 may be the communication interface 404 shown in fig. 5, and may also be a transceiver circuit, a transceiver, a radio frequency device, or the like.

In one possible approach, the memory unit 1701 may be the memory 403 shown in fig. 5.

Embodiments of the present application also provide a communication device including one or more processors and one or more memories. The one or more memories are coupled to the one or more processors, the one or more memories being configured to store computer program code comprising computer instructions that, when executed by the one or more processors, cause the communication device to perform the related method steps described above to implement the data transmission method of the above embodiments.

The embodiment of the application also provides a chip system, which comprises: a processor coupled to a memory for storing programs or instructions which, when executed by the processor, cause the system-on-a-chip to implement the method of any of the method embodiments described above.

Alternatively, the processor in the system-on-chip may be one or more. The processor may be implemented in hardware or in software. When implemented in hardware, the processor may be a logic circuit, an integrated circuit, or the like. When implemented in software, the processor may be a general purpose processor, implemented by reading software code stored in a memory.

Alternatively, the memory in the system-on-chip may be one or more. The memory may be integral with the processor or separate from the processor, and is not limited in this application. For example, the memory may be a non-transitory processor, such as a ROM, which may be integrated on the same chip as the processor, or may be separately provided on different chips, and the type of memory and the manner of providing the memory and the processor are not specifically limited in this application.

The system-on-chip may be, for example, a field programmable gate array (field programmable gatearray, FPGA), an application specific integrated chip (application specific integrated circuit, ASIC), a system on chip (SoC), a central processing unit (central processorunit, CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), a microcontroller (micro controller unit, MCU), a programmable controller (programmable logic device, PLD) or other integrated chip.

It should be understood that the steps in the above-described method embodiments may be accomplished by integrated logic circuitry in hardware in a processor or instructions in the form of software. The steps of a method disclosed in connection with the embodiments of the present application may be embodied directly in a hardware processor or in a combination of hardware and software modules in a processor.

The present application also provides a computer-readable storage medium having stored therein computer instructions which, when executed on a communication device, cause the communication device to perform the above-described related method steps to implement the data transmission method in the above-described embodiments.

The present application also provides a computer program product which, when run on a computer, causes the computer to perform the above-mentioned related steps to implement the data transmission method in the above-mentioned embodiments.

In addition, embodiments of the present application also provide an apparatus, which may be a component or module in particular, which may include a processor and a memory connected; the memory is configured to store computer-executable instructions, and when the apparatus is running, the processor may execute the computer-executable instructions stored in the memory, so that the apparatus performs the data transmission method in the above method embodiments.

The communication device, the computer readable storage medium, the computer program product, or the chip provided in the embodiments of the present application are used to perform the corresponding methods provided above, and therefore, the advantages achieved by the communication device, the computer readable storage medium, the computer program product, or the chip may refer to the advantages in the corresponding methods provided above, and are not described herein.

It will be appreciated that in order to achieve the above-described functionality, the electronic device comprises corresponding hardware and/or software modules that perform the respective functionality. The steps of an algorithm for each example described in connection with the embodiments disclosed herein may be embodied in hardware or a combination of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application in conjunction with the embodiments, but such implementation is not to be considered as outside the scope of this application.

The present embodiment may divide the functional modules of the electronic device according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated modules described above may be implemented in hardware. It should be noted that, in this embodiment, the division of the modules is schematic, only one logic function is divided, and another division manner may be implemented in actual implementation.

From the foregoing description of the embodiments, it will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of functional modules is illustrated, and in practical application, the above-described functional allocation may be implemented by different functional modules according to needs, i.e. the internal structure of the apparatus is divided into different functional modules to implement all or part of the functions described above. The specific working processes of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which are not described herein.

In the several embodiments provided in this application, it should be understood that the disclosed methods may be implemented in other ways. For example, the above-described embodiments of the terminal device are merely illustrative, e.g., the division of the modules or units is merely a logical functional division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via interfaces, modules or units, which may be in electrical, mechanical or other forms.

The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

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

The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform all or part of the steps of the methods described in the various embodiments of the present application. And the aforementioned storage medium includes: flash memory, removable hard disk, read-only memory, random access memory, magnetic or optical disk, and the like.

The foregoing is merely a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered in the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of data transmission, the method comprising:

the method comprises the steps that receiving equipment receives N transmission blocks TB, wherein N is a positive integer;

the receiving device obtains the upper limit of the transmission times of the feedback channel and the parameters of the comb teeth, and sends feedback information for M TB in the N TB according to the parameters of the comb teeth and the upper limit of the transmission times, wherein M is a positive integer, M is smaller than or equal to N, M is smaller than or equal to the upper limit P of the number of feedback information sent by the receiving device, the upper limit P of the number is determined according to the upper limit of the transmission times and the parameters of the comb teeth, and P is a positive integer.

2. The method according to claim 1, wherein the parameters of the comb teeth comprise the spacing between adjacent physical resource blocks, PRBs, within the comb teeth and/or the number of PRBs within a comb tooth.

3. Method according to claim 1 or 2, characterized in that the upper number limit P fulfils the following condition:

or->Or->Or->Or->Or->

4. A method according to claim 3, wherein said sending feedback information comprises:

5. The method of claim 4, wherein the step of determining the position of the first electrode is performed,in the case of (a), the first comb teeth include PRBs greater than Q.

6. The method of claim 5, wherein if Q < X, the method further comprises:

7. Method according to claim 1 or 2, characterized in that the upper number limit P satisfies the following relation:

or->Or->

Wherein L represents the upper limit of the number of transmissions,representing a data transmission stationThe number of PRBs within the occupied bandwidth, GAP representing the spacing between adjacent PRBs in the comb, ++ >The number of PRBs in the comb is represented.

8. The method of claim 7, wherein transmitting feedback information comprises:

transmitting feedback information through R PRBs of the second comb teeth;

9. Method according to claim 1 or 2, characterized in that the upper number limit P satisfies the following relation: or->

Wherein N is _innterlace Indicating the number of fingers available for the feedback channel, L indicating the upper limit of the number of transmissions.

10. The method of claim 9, wherein transmitting feedback information comprises: and sending feedback information through the PRB with the highest frequency band and the PRB with the lowest frequency band in the first comb teeth.

11. The method according to any one of claims 1-10, wherein the range of values of M satisfies the following condition:

2 ^M-1 ≤N _CS ；

12. The method according to any one of claims 1-11, further comprising:

13. The method of claim 12, wherein the indication information is further used to indicate time domain end positions of the N TBs.

14. The method according to any one of claims 1 to 13, wherein,

the sequence pair is determined according to M-1 pieces of feedback information corresponding to M-1 TB in the M pieces of TB, and the sequence pair is used for bearing the feedback information of the M-1 TB;

15. The method according to any one of claims 1 to 13, wherein,

the sequence is determined according to M pieces of feedback information corresponding to the M pieces of TB, and the sequence is used for bearing the M pieces of feedback information.

16. The method of claim 14, wherein the sequence pairs are determined according to the following formula:

(P _ID +M _ID +k’)mod N _CS ；

wherein P is _ID Representing source identity of physical layer, M _ID Representing parameters related to propagation type, k' being parameters related to M-1 feedback information of the M feedback information, N _CS Representation ofThe number of available sequence pairs of the feedback channel, mod, represents the modulo operator.

17. The method of claim 15, wherein the sequence is determined according to the formula:

18. The method according to any one of claims 1 to 17, wherein,

the number of the TB which fails to be decoded in the N TB is S;

19. The method of any of claims 1-17, wherein if all of the N TBs are successfully decoded, the M TBs are the last TB of the N TBs, and the feedback information corresponding to the M TBs is an ACK for the last TB.

20. A method of data transmission, the method comprising:

21. The method of claim 20, wherein the sending feedback information comprises:

22. The method of claim 21, wherein if Q < X, the method further comprises:

23. The method according to any of claims 20-22, wherein transmitting feedback information comprises:

transmitting feedback information through R PRBs of the second comb teeth;

24. The method according to any one of claims 20-23, further comprising:

25. A communication device comprising a memory, a processor, and a transceiver, wherein:

the memory is used for storing computer instructions;

the transceiver is used for receiving and transmitting information;

the processor, coupled to the memory, for invoking computer instructions in the memory to perform the method of any of claims 1-19, or to perform the method of any of claims 20-24, by the transceiver.

26. A computer readable storage medium having stored therein computer executable instructions which when invoked by the computer to perform the method of any one of claims 1-19 or to perform the method of any one of claims 20-24.

27. A computer program product comprising instructions which, when run on a computer, cause the method of any one of claims 1 to 19, or the method of any one of claims 20 to 24, to be performed.

28. A chip, characterized in that the chip is coupled to a memory for reading and executing program instructions stored in the memory for implementing the method according to any of claims 1-19 or for implementing the method according to any of claims 20-24.