Information transmission method, information transmission device, and storage medium

Abstract

This application provides an information transmission method, an apparatus and a storage medium. The information transmission method applied to a first communication node includes: determining at least one second feedback slot mapped to a first feedback slot (S110), each second feedback slot including at least two feedback resource subsets; determining candidate PSSCH transmission occasions corresponding to the at least one feedback resource subset in each second feedback slot (S120); and sending feedback information corresponding to the candidate PSSCH transmission occasions in the first feedback slot to a second communication node (S130).

Description

[Technical Field]

[0001] The present application relates to the field of communications, in particular to information transmission methods, Information Transmission Devices and storage media. [Background technology]

[0002] 1 is a schematic diagram of communication between a user equipment (UE) and a base station according to the related art. As shown in FIG. 1, UE1 transmits one or more physical sidelink shared channels (PSSCHs) to one or more UEs. Then, UE2 receives at least one PSSCH from the one or more PSSCHs and feeds back to UE1 via a physical sidelink feedback channel (PSFCH) whether the PSSCH has been correctly received. There may be other UEs other than UE2, and they feed back to UE1 via the PSFCH whether the PSSCH has been correctly received.

[0003] After receiving the PSFCH of UE2 and / or other UEs, UE1 feeds back N-bit Hybrid Automatic Repeat reQuest (HARQ)-acknowledgement (ACK) information to the base station. Here, each bit in the N-bit HARQ-ACK information is used to indicate whether the PSSCH has been correctly received. For example, if a predetermined bit in the HARQ-ACK information is 1, it indicates that the corresponding PSSCH has been correctly received, and if a predetermined bit in the HARQ-ACK information is 0, it indicates that the corresponding PSSCH has not been correctly received. Summary of the Invention [Problem to be solved by the invention]

[0004] In the design of the sidelink of the unlicensed spectrum, how UE1 generates HARQ-ACK information and reports the generated HARQ-ACK information to the base station is an urgent problem to be solved. [Means for solving the problem]

[0005] The present embodiment is An information transmission method applied to a first communication node, comprising: determining at least one second feedback slot mapped to the first feedback slot, each second feedback slot including at least two feedback resource subsets; determining candidate PSSCH (Physical Sidelink Shared Channel) transmission occasions corresponding to at least one feedback resource subset in each second feedback slot; transmitting feedback information corresponding to the candidate PSSCH transmission occasions to a second communication node in the first feedback slot. A method for transmitting information is provided.

[0006] The present embodiment is An information transmission method applied to a second communication node, comprising: receiving feedback information corresponding to candidate PSSCH transmission occasions transmitted from a first communication node in a first feedback slot; A method for transmitting information is provided.

[0007] The present application is directed to a memory and at least one processor; the memory is configured to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the method according to any one of the preceding embodiments. Provides information transmission equipment.

[0008] The present application is directed to A computer program is stored which, when executed by a processor, implements the method according to any of the preceding embodiments. Provide a storage medium. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic diagram of communication between a UE and a base station according to the related art. [Figure 2] 1 is a flowchart of an information transmission method according to an embodiment of the present application; [Figure 3] 4 is a flowchart of another information transmission method according to an embodiment of the present application. [Figure 4] FIG. 10 is a schematic diagram illustrating slot settings according to an embodiment of the present application. [Figure 5] FIG. 10 is a schematic diagram illustrating the setting of candidate PSSCH transmission occasion numbers according to an embodiment of the present application; [Figure 6] FIG. 10 is a schematic diagram illustrating the numbering of another candidate PSSCH transmission occasion according to an embodiment of the present application; [Figure 7] FIG. 10 is a schematic diagram illustrating the setting of numbers of further candidate PSSCH transmission occasions according to an embodiment of the present application; [Figure 8] FIG. 10 is a schematic diagram illustrating another slot setting according to an embodiment of the present application. [Figure 9] 10 is a schematic diagram of a further slot configuration according to an embodiment of the present application; [Figure 10] 1 is a structural block diagram of an information transmission device according to an embodiment of the present application; [Figure 11] FIG. 2 is a structural block diagram of another information transmission device according to an embodiment of the present application; [Figure 12] 1 is a structural schematic diagram of an information transmission device according to an embodiment of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, the present application will be described with reference to the drawings. Hereinafter, the present application will be described with reference to the drawings of the examples. The examples given are merely for the purpose of interpreting the present application and are not intended to limit the scope of the present application.

[0011] In a SideLink communication system, when traffic needs to be transmitted between UEs, the traffic is transmitted directly from a data source UE to a target UE via SideLink without going through the network, i.e., without going through a cellular link between the UE and a base station. This direct UE-to-UE communication mode clearly distinguishes it from traditional cellular system communication modes. Typical applications of SideLink communication include device-to-device (D2D) communication and vehicle-to-everything (V2X) communication. Here, vehicle-to-everything (V2X) communication includes vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure (V2I). For short-range communication users who can apply SideLink communication, SideLink communication not only saves wireless spectrum resources, but also further reduces the data transmission pressure of the core network, reduces the occupation of system resources, improves the spectral efficiency of cellular communication systems, reduces communication delays, and significantly saves network operation costs.

[0012] In an unlicensed spectrum, only channels that have successfully passed LBT (Listen Before Talk) can transmit. In the so-called LBT, communication nodes must compete for resources, and only after successfully competing for time-frequency resources can the communication node transmit information on the time-frequency resources. More specifically, in the LBT mechanism, before transmitting information, the communication node performs a channel access process (intercepts whether the channel is idle), and only after intercepting that the channel is idle can the communication node transmit information.

[0013] In the SideLink design, only the Intelligent Transport System (ITS) spectrum and licensed spectrum allocated to network operators are considered for the SideLink. Therefore, in the design where the SideLink uses unlicensed spectrum for the SideLink, how to generate HARQ-ACK information and report the HARQ-ACK information to the base station is an urgent issue to be solved.

[0014] An embodiment of the present application proposes an information transmission method, which supports a terminal to feed back HARQ-ACK information to a base station when the sidelink uses unlicensed spectrum and there are multiple PSFCH reception occasions, and the fed back HARQ-ACK information is used to reflect whether the sidelink PSSCH is correctly received.

[0015] In one embodiment, FIG. 2 is a flowchart of an information transmission method according to an embodiment of the present application. This embodiment can be performed by a first communication node. Here, the first communication node may be a terminal side (e.g., a user equipment). As shown in FIG. 2, this embodiment includes steps S110 to S130.

[0016] At S110, determine at least one second feedback slot that is mapped to the first feedback slot.

[0017] Here, each second feedback slot includes at least two feedback resource subsets. In an embodiment, the first feedback slot is a slot for feeding back HARQ-ACK information in a Physical Uplink Control Channel (PUCCH) slot, the second feedback slot is a slot including PSFCH resources, and the feedback resource subset may be a PSFCH resource subset. In an embodiment, the first feedback slot may correspond to one or more second feedback slots, and the first feedback slot is sorted according to the time domain, with the first feedback slot located after the second feedback slot. Note that determining at least one second feedback slot mapped to one first feedback slot means determining at least one slot including PSFCH resources mapped to one first feedback slot.

[0018] At S120, determine candidate PSSCH transmission occasions corresponding to at least one feedback resource subset in each second feedback slot.

[0019] In an embodiment, for each slot including a PSFCH resource, a candidate PSSCH transmission occasion corresponding to at least one feedback resource subset included in the slot is determined. Here, the candidate PSSCH transmission occasion refers to a slot available for transmitting a PSSCH. In an embodiment, each feedback resource subset may include multiple PSFCH resources for feeding back one or more candidate PSSCH transmission occasions. In an embodiment, the candidate PSSCH transmission occasions corresponding to two feedback resource subsets may be the same or different. If the candidate PSSCH transmission occasions corresponding to two feedback resource subsets are the same, the candidate PSSCH transmission occasion is fed back twice, i.e., information on whether it has been correctly received is transmitted twice to the first communication node.

[0020] At S130, feedback information corresponding to the candidate PSSCH transmission occasion is transmitted to a second communication node in a first feedback slot.

[0021] Here, the first communication node sends feedback information to the second communication node through the first feedback slot to indicate to the second communication node whether the PSSCH corresponding to the candidate PSSCH transmission occasion has been correctly received, thereby achieving the effect that the first communication node can send HARQ-ACK information to the second communication node when there are multiple PSSCH reception occasions in the unlicensed spectrum.

[0022] In one embodiment, each second feedback slot including at least two feedback resource subsets includes each feedback resource subset corresponding to one physical sidelink feedback channel (PSFCH) reception occasion of a candidate PSSCH transmission occasion corresponding to each feedback resource in the respective feedback resource subset. In the embodiment, the number of PSFCH reception occasions of each candidate PSSCH transmission occasion is equal to the number of feedback resource subsets. Illustratively, assuming the second feedback slot includes two feedback resource subsets, each feedback resource in one feedback resource subset corresponds to the first PSFCH reception occasion of one candidate PSSCH transmission occasion, and each feedback resource in the other feedback resource subset corresponds to the second PSFCH reception occasion of one candidate PSSCH transmission occasion.

[0023] In one embodiment, determining candidate PSSCH transmission occasions corresponding to at least one feedback resource subset in each second feedback slot includes determining candidate PSSCH transmission occasions corresponding to one feedback resource subset in each second feedback slot, where each feedback resource in one feedback resource subset corresponds to an initial PSFCH reception occasion corresponding to the candidate PSSCH transmission occasion. In one embodiment, for each second feedback slot, candidate PSSCH transmission occasions are determined by one feedback resource subset, where each feedback resource in the feedback resource subset corresponds to an initial PSFCH reception occasion of one candidate PSSCH transmission occasion.

[0024] In one embodiment, determining candidate PSSCH transmission occasions corresponding to at least one feedback resource subset in each second feedback slot includes determining candidate PSSCH transmission occasions corresponding to one feedback resource subset in each second feedback slot, where each feedback resource in one feedback resource subset corresponds to a final PSFCH reception occasion corresponding to the candidate PSSCH transmission occasion. In one embodiment, for each second feedback slot, candidate PSSCH transmission occasions are determined using one feedback resource subset, where each feedback resource in the feedback resource subset corresponds to a final PSFCH reception occasion of multiple PSFCH reception occasions for one candidate PSSCH transmission occasion.

[0025] In one embodiment, determining candidate PSSCH transmission occasions corresponding to at least one feedback resource subset in each second feedback slot includes determining candidate PSSCH transmission occasions corresponding to the mth feedback resource subset in each second feedback slot, where 1≦m≦M, and M is the number of feedback resource subsets included in each second feedback slot. In one embodiment, the candidate PSSCH transmission occasions are determined by one feedback resource subset for each second feedback slot, where each feedback resource in the feedback resource subset corresponds to the mth PSSCH reception occasion of one candidate PSSCH transmission occasion.

[0026] In one embodiment, determining candidate PSSCH transmission occasions corresponding to at least one feedback resource subset in each second feedback slot includes determining candidate PSSCH transmission occasions corresponding to a first feedback resource subset in the at least one second feedback slot, and determining candidate PSSCH transmission occasions corresponding to the first feedback resource subset and a second feedback resource subset in the at least one second feedback slot, where each feedback resource in the first feedback resource subset corresponds to a first PSFCH reception occasion of the candidate PSSCH transmission occasion, and each feedback resource in the second feedback resource subset corresponds to a last PSFCH reception occasion of the candidate PSSCH transmission occasion. In an embodiment, the candidate PSSCH transmission occasions can be determined based on the first PSFCH reception occasion and the last PSFCH reception occasion, i.e., for at least one slot of the second feedback slots, a candidate PSSCH transmission occasion corresponding to a first feedback resource subset in the second feedback slot is determined, and for at least one slot of the second feedback slots, a candidate PSSCH transmission occasion corresponding to a first feedback resource subset and a second feedback resource subset in the second feedback slot is determined, where each feedback resource in the first feedback resource subset corresponds to the first PSFCH reception occasion of the candidate PSSCH transmission occasion, and each feedback resource in the second feedback resource subset corresponds to the last PSFCH reception occasion of the candidate PSSCH transmission occasion.

[0027] In one embodiment, determining candidate PSSCH transmission occasions corresponding to at least one feedback resource subset in each second feedback slot includes determining candidate PSSCH transmission occasions corresponding to a first feedback resource subset in at least one second feedback slot, and determining candidate PSSCH transmission occasions corresponding to the first feedback resource subset and the second feedback resource subset in at least one second feedback slot. Here, each feedback resource in the first feedback resource subset corresponds to the m-th PSFCH reception occasion of the candidate PSSCH transmission occasion, where 1 ≤ m < M, and M is the number of feedback resource subsets included in each second feedback slot. Each feedback resource in the second feedback resource subset is the last PSFCH reception occasion corresponding to the candidate PSSCH transmission occasion. In the embodiment, the candidate PSSCH transmission occasions can be determined based on the m-th PSFCH reception occasion and the last PSFCH reception occasion. That is, for at least one slot among the second feedback slots, determine the candidate PSSCH transmission occasions corresponding to the first feedback resource subset in the second feedback slot, and for at least one slot among the second feedback slots, determine the candidate PSSCH transmission occasions corresponding to the first feedback resource subset and the second feedback resource subset in the second feedback slot. Here, each feedback resource in the first feedback resource subset corresponds to the m-th PSFCH reception occasion of the candidate PSSCH transmission occasion, and each feedback resource in the second feedback resource subset corresponds to the last PSFCH reception occasion among the m PSFCH reception occasions corresponding to the candidate PSSCH transmission occasion.

[0028] In one embodiment, the method for determining the value of m includes determining the value of m based on received control information. In one embodiment, the first communication node receives the control information sent from the second communication node and determines the value of m based on the control information.

[0029] In one embodiment, the information type of the control information includes at least one of Radio Resource Control (RRC) signaling, System Information Block (SIB) information, and Downlink Control Information (DCI).

[0030] In one embodiment, the control information carries at least one of the number of the feedback resource subset and the number of PSFCH reception occasions.

[0031] In one embodiment, determining the value of m based on the received control information includes one of determining that the value of m is a feedback resource subset number, determining that the value of m is the feedback resource subset number plus 1, and determining that the value of m is the number of PSFCH receiving occasions.

[0032] In an embodiment, if the control information includes a feedback resource subset number, the second communication node can determine, based on the control information, that the value of m is equal to the feedback resource subset number, or equal to the feedback resource subset number plus 1. It can be understood that if the feedback resource subset number starts from 0, the value of m is equal to the feedback resource subset number plus 1, and if the feedback resource subset number starts from 1, the value of m is equal to the feedback resource subset number. If the control information includes the number of PSFCH receiving occasions, the second communication node can determine, based on the control information, that the value of m is equal to the number of PSFCH receiving occasions.

[0033] In one embodiment, the number of the candidate PSSCH transmission occasions is determined by the periodicity value of the PSFCH, the f-th second feedback slots sorted in reverse time domain order, and the n-th second feedback slots mapped to the f-th second feedback slots. f and determining a candidate PSSCH transmission occasion number based on the n-th candidate PSSCH transmission occasion. In an embodiment, j can be used to represent the candidate PSSCH transmission occasion number, where j is expressed as j=f×T+n f where T may represent a periodicity value of the PSFCH, and f represents the fth second feedback slot from the back in the time domain among the F second feedback slots mapped to one first feedback slot, where f is an integer between [0, F], and n f is the nth second feedback slot that is mapped to the fth second feedback slot. f th candidate PSSCH transmission occasion.

[0034] In one embodiment, the j-th candidate PSSCH transmission occasion among all candidate PSSCH transmission occasions sorted in reverse time domain order has number j. In one embodiment, the j-th candidate PSSCH transmission occasion among all candidate PSSCH transmission occasions sorted in reverse time domain order has number j.

[0035] In one embodiment, the bit number of the feedback information is equal to the number of the candidate PSSCH transmission occasion. In this embodiment, the first communication node transmits feedback information to the second communication node, and the j-th bit of the feedback information that is fed back corresponds to the feedback information of the j-th candidate PSSCH transmission occasion.

[0036] In one embodiment, the candidate PSSCH transmission occasions are sorted in order of time domain, and for the first second feedback slot, the candidate PSSCH transmission occasions are the candidate PSSCH transmission occasions corresponding to the first feedback resource subset and the second feedback resource subset; and the candidate PSSCH transmission occasions are sorted in order of time domain, and for the second feedback slots other than the first second feedback slot, the candidate PSSCH transmission occasions are the candidate PSSCH transmission occasions corresponding to the first feedback resource subset.

[0037] In one embodiment, determining at least one second feedback slot to be mapped to the first feedback slot includes: determining the first feedback slot based on time-domain position information of the PUCCH indicated by the DCI or RRC message; and determining at least one second feedback slot to be mapped to the first feedback slot based on a timing relationship between the PSFCH and the PUCCH indicated by the DCI or RRC message, wherein the first feedback slot is one PUCCH slot, the second feedback slot is a slot including a PSFCH resource, and the feedback resource subset is a PSFCH resource subset.

[0038] In one embodiment, Figure 3 is a flowchart of another information transmission method according to an embodiment of the present application. This embodiment can be performed by a second communication node, where the second communication node is a base station. As shown in Figure 3, this embodiment includes S210.

[0039] At S210, receive feedback information corresponding to candidate PSSCH transmission occasions sent from a first communication node in a first feedback slot.

[0040] In an embodiment, the second communication node receives feedback information corresponding to the candidate PSSCH transmission occasion transmitted from the first communication node in the first feedback slot, thereby timely knowing whether the data between the first communication node and another first communication node has been transmitted correctly.

[0041] In Example 1, the first communication node is a terminal and the second communication node is a base station, and a feedback information transmission process is described below. In this embodiment, the step of the terminal reporting HARQ-ACK information to the base station includes: determining a slot including F≧1 PSFCH resources (i.e., the second feedback slot in the above embodiment) that is mapped to one first feedback slot n, where the slot including the PSFCH resources includes M≧2 PSFCH resource subsets; and determining, for each slot including the PSFCH resources, candidate PSSCH transmission occasions corresponding to at least one PSFCH resource subset included in the slot.

[0042] Report HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information of the candidate PSSCH transmission occasions.

[0043] A candidate PSSCH transmission occasion belonging to the candidate PSSCH transmission occasions is an occasion at which the first communication node may transmit a PSSCH, but does not mean that the first communication node will necessarily transmit a PSSCH on that candidate PSSCH transmission occasion.

[0044] Preferably, the slot including the PSFCH resource including M≧2 PSFCH resource subsets includes, for one PSFCH resource subset, each PSFCH resource in the PSFCH resource subset corresponds to a first PSFCH reception occasion of one PSSCH, and for one PSFCH resource subset, each PSFCH resource in the PSFCH resource subset corresponds to a second PSFCH reception occasion of one PSSCH, and by analogy therewith.

[0045] Fig. 4 is a schematic diagram of slot setting according to an embodiment of the present application. The above process will be described in detail using Fig. 4 as an example. Before describing the above process in detail, Fig. 4 will first be described.

[0046] In FIG. 4, there is one slot containing a PSFCH for every four sidelink slots, i.e. the period of the PSFCH is T=4.

[0047] In Figure 4, the first feedback slot n is the slot for HARQ-ACK information reported by the terminal to the base station, and the number of the first feedback slot n is expressed in the format of X+21. Assume that one group of slot timing values ​​from PSFCH to HARQ feedback is {2, 6, 10}. In this case, the slots before slot n and with a slot interval of {2, 6, 10} to slot n are {X+19, X+15, X+11}, and these three slots include PSFCH resources. Therefore, the slots including F=3 PSFCH resources mapped to slot n are {X+19, X+15, X+11}.

[0048] In FIG. 4, from the perspective of one UE2 that has received a PSSCH, UE2 needs to feed back sidelink HARQ-ACK information for the received PSSCH to UE1 via a PSFCH. For one PSSCH in one slot, UE2 has M=2 PSFCH transmission occasions. From the perspective of UE2, a PSFCH transmission occasion is a PSFCH transmission occasion. The first PSFCH transmission occasion is the slot containing the first PSFCH resource after G (G=2 in FIG. 4) slots, and the second transmission occasion is the slot containing the next PSFCH resource after the slot in which the first PSFCH transmission occasion is located. Here, G represents the smallest slot interval between PSSCH reception and PSFCH transmission. Based on this description, for a PSSCH in slot X+2, the first PSFCH transmission occasion is located in slot X+7, and the second PSFCH transmission occasion is located in slot X+11.

[0049] Similarly, from the perspective of UE1, which has transmitted one PSSCH, UE1 needs to receive sidelink HARQ-ACK information fed back by UE2 via the PSFCH, and UE2 is the receiving UE of the PSSCH. For one PSSCH in one slot, UE1 has M PSFCH transmission occasions. From the perspective of UE1, the PSFCH transmission occasions are PSFCH reception occasions. The first PSFCH transmission occasion is the slot containing the first PSFCH resource after G (G=2 in FIG. 4) slots, and the second transmission occasion is the slot containing the next PSFCH resource after the slot in which the first PSFCH transmission occasion is located. Here, G represents the smallest slot interval between PSSCH transmission and PSFCH reception.

[0050] Each slot including PSFCH resources includes M PSFCH resource subsets, each corresponding to one PSFCH transmission occasion. In Figure 4, when M=2, a slot including PSFCH resources includes PSFCH resource subset 1 and PSFCH resource subset 2. PSFCH resource subset 1 includes multiple PSFCH resources, each of which corresponds to the first PSFCH transmission occasion. Similarly, PSFCH resource subset 2 includes multiple PSFCH resources, each of which corresponds to the second PSFCH transmission occasion.

[0051] Based on the description of Figure 4 above, the terminal performs the following process:

[0052] The terminal determines slots including F≧1 PSFCH resources to be mapped to one slot n. As described above, the slots including F≧1 PSFCH resources to be mapped to slot n are three slots, X+19, X+15, and X+11.

[0053] For a slot including the PSFCH resource, determine candidate PSSCH transmission occasions corresponding to at least one PSFCH resource subset included in the slot. For slot X+19, the candidate PSSCH transmission occasions determined by PSFCH resource subset 1 are located at {X+17, X+16, X+15, X+14}.

[0054] UE1 reports HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information of the candidate PSSCH transmission occasions.

[0055] The terminal determines candidate PSSCH transmission occasions for each of the F PSFCH slots, and feeds back HARQ-ACK information to the base station for all of these candidate PSSCH transmission occasions. The slot in which UE1 reports HARQ-ACK information to the base station is PUCCH slot n, and in PUCCH slot n, the terminal reports HARQ-ACK information to the base station via PUCCH or PUSCH.

[0056] In Example 2, the first communication node is a terminal, the second communication node is a base station, and the terminal determines candidate PSSCH transmission occasions at the initial PSFCH reception occasions as an example to describe the feedback information transmission process. In this embodiment, the step of the terminal reporting HARQ-ACK information to the base station includes: determining a slot including F≧1 PSFCH resources mapped to one slot n, where the slot including the PSFCH resources includes M≧2 PSFCH resource subsets; and determining a candidate PSSCH transmission occasion for each slot including the PSFCH resources by one PSFCH resource subset, where each PSFCH resource in the PSFCH resource subset corresponds to the initial PSFCH transmission occasion of one PSSCH, and reporting HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information of the candidate PSSCH transmission occasions.

[0057] Next, the above process will be described in detail with reference to Fig. 4. The description of Fig. 4 itself refers to Example 1.

[0058] The terminal determines a slot including F≧1 PSFCH resources to be mapped to one slot n, and the slot including the PSFCH resources includes M≧2 PSFCH resource subsets. In Figure 4, the slots including F≧1 PSFCH resources mapped to slot n are three slots {X+19, X+15, X+11}. Each of the three slots includes M=2 PSFCH resource subsets, which are PSFCH resource subset 1 and PSFCH resource subset 2, respectively.

[0059] For each slot including the PSFCH resource, candidate PSSCH transmission occasions are determined by one PSFCH resource subset, where each PSFCH resource in the PSFCH resource subset corresponds to the initial PSFCH transmission occasion of one PSSCH. For slot X+19 including the PSFCH resource, PSFCH resource subset 1 includes multiple PSFCH resources, where each PSFCH resource corresponds to the initial transmission occasion of one PSSCH. Wherein at least one PSFCH resource corresponds to the PSSCH resource in slot X+14, at least one PSFCH resource corresponds to the PSSCH resource in slot X+15, at least one PSFCH resource corresponds to the PSSCH resource in slot X+16, and at least one PSFCH resource corresponds to the PSSCH resource in slot X+17. Therefore, because PSFCH resource subset 1 in slot X+19 includes PSFCH resources, the determined candidate PSSCH transmission occasions are located in slots {X+14, X+15, X+16, X+17}. Similarly, because PSFCH resource subset 1 in slot X+15 includes PSFCH resources, the determined candidate PSSCH transmission occasions are located in slots {X+10, X+11, X+12, X+13}, and because PSFCH resource subset 1 in slot X+11 includes PSSCH resources, the determined candidate PSSCH transmission occasions are located in slots {X+6, X+7, X+8, X+9}. Therefore, based on this process, all determined candidate PSSCH transmission occasions are located in slots {X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}, respectively.

[0060] UE1 reports HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information of the candidate PSSCH transmission occasions. The terminal feeds back 12 bits of HARQ-ACK to the base station, where each bit of HARQ-ACK corresponds to one candidate PSSCH transmission occasion among the candidate PSSCH transmission occasions located in slots {X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}. The slot in which UE1 reports the HARQ-ACK information to the base station is PUCCH slot n, and in PUCCH slot n, the terminal reports the HARQ-ACK information to the base station via PUCCH or PUSCH.

[0061] Preferably, the candidate PSSCH transmission occasions are numbered, and the numbering rule determines the number j of the candidate PSSCH transmission occasions, where j=f×T+n f where T represents the periodicity of the PSFCH, f represents the slot including the fth PSFCH resource from the rear in time among slots including F PSFCH resources mapped to one slot, f is an integer between [0, F], and n f is the nth PSFCH resource that is mapped to the slot containing the fth PSFCH resource. f represents the th PSSCH.

[0062] According to the numbering rule, the candidate PSSCH transmission occasions for slots {X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17} are numbered {11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}, respectively. Figure 5 is a schematic diagram illustrating how candidate PSSCH transmission occasions are numbered according to an embodiment of the present application. As shown in Figure 5, bit 0 of the 12 HARQ bits corresponds to candidate PSSCH transmission occasion number 0, and bit 1 of the 12 HARQ bits corresponds to candidate PSSCH transmission occasion number 1, by analogy.

[0063] In Example 3, the first communication node is a terminal, the second communication node is a base station, and the terminal determines a candidate PSSCH transmission occasion at the last PSFCH reception occasion, to describe the transmission process of the feedback information. In this embodiment, the step of the terminal reporting HARQ-ACK information to the base station includes: determining a slot including F≧1 PSFCH resources mapped to one slot n, where the slot including the PSFCH resources includes M≧2 PSFCH resource subsets; and determining a candidate PSSCH transmission occasion by one PSFCH resource subset for each slot including the PSFCH resources, where each PSFCH resource in the PSFCH resource subset corresponds to the last PSFCH transmission occasion of the M PSFCH transmission occasions of one PSSCH, and reporting HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information of the candidate PSSCH transmission occasion.

[0064] Next, the above process will be described in detail with reference to Fig. 4. The description of Fig. 4 itself refers to Example 1.

[0065] The terminal determines a slot including F≧1 PSFCH resources to be mapped to one slot n, and the slot including the PSFCH resources includes M≧2 PSFCH resource subsets. In Figure 4, the slots including F≧1 PSFCH resources mapped to slot n are three slots {X+19, X+15, X+11}. Each of the three slots includes M=2 PSFCH resource subsets, which are PSFCH resource subset 1 and PSFCH resource subset 2, respectively.

[0066] For each slot including the PSFCH resource, candidate PSSCH transmission occasions are determined by one PSFCH resource subset, where each PSFCH resource in the PSFCH resource subset corresponds to the final PSFCH transmission occasion of the M PSFCH transmission occasions for one PSSCH. For slot X+19 including a PSFCH resource, PSFCH resource subset 2 includes multiple PSFCH resources, where each PSFCH resource corresponds to the final transmission occasion of the M PSFCH transmission occasions for one PSSCH. In PSFCH resource subset 2 for slot X+19, at least one PSFCH resource corresponds to the PSSCH resource in slot X+10, at least one PSFCH resource corresponds to the PSSCH resource in slot X+11, at least one PSFCH resource corresponds to the PSSCH resource in slot X+12, and at least one PSFCH resource corresponds to the PSSCH resource in slot X+13. Therefore, because PSFCH resource subset 2 in slot X+19 includes PSFCH resources, the determined candidate PSSCH transmission occasions are located in slots {X+10, X+11, X+12, X+13}. Similarly, because PSFCH resource subset 2 in slot X+15 includes PSFCH resources, the determined candidate PSSCH transmission occasions are located in slots {X+6, X+7, X+8, X+9}, and because PSFCH resource subset 2 in slot X+11 includes PSSCH resources, the determined candidate PSSCH transmission occasions are located in slots {X+2, X+3, X+4, X+5}. Therefore, based on this process, all determined candidate PSSCH transmission occasions are located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13}, respectively.

[0067] UE1 reports HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information of the candidate PSSCH transmission occasions. The terminal feeds back 12 bits of HARQ-ACK to the base station, where each bit of HARQ-ACK corresponds to one candidate PSSCH transmission occasion among the candidate PSSCH transmission occasions located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13}. The slot in which UE1 reports the HARQ-ACK information to the base station is PUCCH slot n, and in PUCCH slot n, the terminal reports the HARQ-ACK information to the base station via PUCCH or PUSCH.

[0068] Preferably, the candidate PSSCH transmission occasions are numbered, and the numbering rule determines the number j of the candidate PSSCH transmission occasions, where j=f×T+n f It includes:

[0069] where T represents the periodicity of the PSFCH, f represents the slot including the fth PSFCH resource from the back in time among the slots including F PSFCH resources mapped to one slot, f is an integer between [0, F], and n f is the nth PSFCH resource that is mapped to the slot containing the fth PSFCH resource. f represents the th PSSCH.

[0070] According to the numbering rule, the candidate PSSCH transmission occasions for slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13} are numbered {11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}, respectively. Figure 6 is a schematic diagram illustrating how candidate PSSCH transmission occasions are numbered according to another embodiment of the present application. As shown in Figure 6, bit 0 of the 12 HARQ bits corresponds to candidate PSSCH transmission occasion number 0, and bit 1 of the 12 HARQ bits corresponds to candidate PSSCH transmission occasion number 1, by analogy.

[0071] In Example 4, the first communication node is a terminal, the second communication node is a base station, and the terminal determines a candidate PSSCH transmission occasion at the m-th PSFCH reception occasion as an example to describe the feedback information transmission process. In this embodiment, the step of the terminal reporting HARQ-ACK information to the base station includes: determining a slot including F≧1 PSFCH resources mapped to one slot n, where F≧1 PSFCH resources are mapped to the slot, and the slot including the PSFCH resources includes M≧2 PSFCH resource subsets; and determining a candidate PSSCH transmission occasion by one PSFCH resource subset for each slot including the PSFCH resources. wherein each PSFCH resource in the PSFCH resource subset corresponds to the m-th PSFCH transmission occasion of one PSSCH, where m is an integer between [1, M]; before determining the value of m, the terminal receives control information transmitted from the base station; the terminal determines the value of m according to the received control information and reports HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information of the candidate PSSCH transmission occasion.

[0072] Next, the above process will be described in detail with reference to Fig. 4. The description of Fig. 4 itself refers to Example 1.

[0073] The terminal determines a slot including F≧1 PSFCH resources to be mapped to one slot n, and the slot including the PSFCH resources includes M≧2 PSFCH resource subsets. In Figure 4, the slots including F≧1 PSFCH resources mapped to slot n are three slots {X+19, X+15, X+11}. Each of the three slots includes M=2 PSFCH resource subsets, which are PSFCH resource subset 1 and PSFCH resource subset 2, respectively.

[0074] When M=2 and m=1, the terminal determines slots including F≧1 PSFCH resources mapped to one slot n as {X+19, X+15, X+11}. Based on {PSFCH resource subset 1 in slot X+19, PSFCH resource subset 1 in slot X+15, PSFCH resource subset 1 in slot X+11}, the determined slots of candidate PSSCH transmission occasions are {X+14, X+15, X+16, X+17}, {X+10, X+11, X+12, X+13}, and {X+6, X+7, X+8, X+9}, respectively. Therefore, all determined candidate PSSCH transmission occasions are located in slots {X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}, respectively. The terminal reports 12 bits of HARQ-ACK information to the base station for the 12 candidate PSSCH transmission occasions.

[0075] When M = 2 and m = 2, the terminal determines slots including F ≥ 1 PSFCH resources mapped to one slot n as {X+19, X+15, X+11}. Based on {PSFCH resource subset 2 in slot X+19, PSFCH resource subset 2 in slot X+15, PSFCH resource subset 2 in slot X+11}, the slots of the determined candidate PSSCH transmission occasions are {X+10, X+11, X+12, X+13}, {X+6, X+7, X+8, X+9}, and {X+2, X+3, X+4, X+5}, respectively. Therefore, all determined candidate PSSCH transmission occasions are located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13}, respectively. The terminal reports 12 bits of HARQ-ACK information to the base station for the 12 candidate PSSCH transmission occasions.

[0076] Preferably, the terminal can determine the m value in the following manner:

[0077] The terminal receives control information transmitted from a base station, the control information including a PSFCH resource subset number, and determines, based on the received control information, that the value m is equal to the PSFCH resource subset number or equal to the PSFCH resource subset number plus 1; alternatively, the terminal receives control information transmitted from a base station, the control information including a number of PSFCH transmission occasions, and determines, based on the received control information, that the value m is equal to the number of PSFCH transmission occasions.

[0078] Preferably, the control information includes at least one of RRC signaling (RRC, Radio Resource Control), SIB information (SIB, System Information Block), and DCI (Downlink Control Information).

[0079] In Example 5, the first communication node is a terminal, the second communication node is a base station, and the terminal determines candidate PSSCH transmission occasions at the first PSFCH reception occasion and the last PSFCH reception occasion as an example to describe the feedback information transmission process. In this embodiment, the step of the terminal reporting HARQ-ACK information to the base station includes: determining slots including F≧1 PSFCH resources mapped to one slot n, where the slot including the PSFCH resources includes M≧2 PSFCH resource subsets; and determining, for at least one slot including the PSFCH resources, a candidate PSSCH transmission occasion corresponding to a first PSFCH resource subset in the slot. For at least one slot including the PSFCH resources, determining candidate PSSCH transmission occasions corresponding to a first PSFCH resource subset and a second PSFCH resource subset in the slot. Each PSFCH resource in the first PSFCH resource subset corresponds to the first PSFCH transmission occasion of one PSSCH. Each PSFCH resource in the second PSFCH resource subset corresponds to the final PSFCH transmission occasion among the M PSFCH transmission occasions corresponding to one PSSCH, and reports HARQ-ACK information to the base station, where the HARQ-ACK information includes the HARQ-ACK information of the candidate PSSCH transmission occasion.

[0080] Next, the above process will be described in detail with reference to Fig. 4. The description of Fig. 4 itself refers to Example 1.

[0081] The terminal determines a slot including F≧1 PSFCH resources to be mapped to one slot n, and the slot including the PSFCH resources includes M≧2 PSFCH resource subsets. In Figure 4, the slots including F≧1 PSFCH resources mapped to slot n are three slots {X+19, X+15, X+11}. Each of the three slots includes M=2 PSFCH resource subsets, which are PSFCH resource subset 1 and PSFCH resource subset 2, respectively.

[0082] For at least one slot among the slots including the PSFCH resources, determine a candidate PSSCH transmission occasion corresponding to a first PSFCH resource subset in the slot. For at least one slot among the slots including the PSFCH resources, determine candidate PSSCH transmission occasions corresponding to a first PSFCH resource subset and a second PSFCH resource subset in the slot. Each PSFCH resource in the first PSFCH resource subset corresponds to the first PSFCH transmission occasion of one PSSCH. Each PSFCH resource in the second PSFCH resource subset corresponds to the last PSFCH transmission occasion of M PSFCH transmission occasions corresponding to one PSSCH. Based on the above, the slots including F≧1 PSFCH resources are {X+19, X+15, X+11}. In this embodiment, the first PSFCH resource subset corresponds to PSFCH resource subset 1 in Figure 4, and each PSFCH resource in PSFCH resource subset 1 corresponds to the first PSFCH transmission occasion of one PSSCH. The second PSFCH resource subset corresponds to PSFCH resource subset M (M=2) in Figure 4, and each PSFCH resource in PSFCH resource subset M=2 corresponds to the last PSFCH transmission occasion of one PSSCH.

[0083] In this embodiment, among slots {X+19, X+15, X+11} including F≧1 PSFCH resources, candidate PSSCH transmission occasions are determined for slots X+19 and X+15 based on a first PSFCH resource subset. Due to the first PSFCH resource subset (PSFCH resource subset 1) in slot X+19 including PSFCH resources, the determined candidate PSSCH transmission occasions are located in slots {X+14, X+15, X+16, X+17}. Due to the first PSFCH resource subset (PSFCH resource subset 1) in slot X+15 including PSFCH resources, the determined candidate PSSCH transmission occasions are located in slots {X+10, X+11, X+12, X+13}.

[0084] In this embodiment, among slots {X+19, X+15, X+11} including F≧1 PSFCH resources, candidate PSSCH transmission occasions for slot X+11 are determined based on a first PSFCH resource subset (PSFCH resource subset 1) and a second PSFCH resource subset (PSFCH resource subset M=2). The candidate PSSCH transmission occasions determined by the first PSFCH resource subset are located in slots {X+6, X+7, X+8, X+9}, and the candidate PSSCH transmission occasions determined by the second PSFCH resource subset are located in slots {X+2, X+3, X+4, X+5}. Therefore, for slot X+11, the candidate PSSCH transmission occasions determined based on the first PSFCH resource subset and the second PSFCH resource subset are located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9}.

[0085] To summarize, in slot {X+19, X+15, X+11} containing F≧1 PSFCH resources, all determined candidate PSSCH transmission occasions are located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}, respectively.

[0086] UE1 reports HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information for the candidate PSSCH transmission occasions. The terminal feeds back 16 bits of HARQ-ACK to the base station, where each bit of HARQ-ACK corresponds to one candidate PSSCH transmission occasion among the candidate PSSCH transmission occasions located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}. The slot in which UE1 reports the HARQ-ACK information to the base station is PUCCH slot n, and in PUCCH slot n, the terminal reports the HARQ-ACK information to the base station via PUCCH or PUSCH.

[0087] Preferably, the candidate PSSCH transmission occasions are numbered, and the numbering rule is that the jth candidate PSSCH transmission occasion from the end of time among all candidate PSSCH transmission occasions determined by slots including the PSFCH resources where F≧1 is numbered j. According to the numbering rule, the candidate PSSCH transmission occasions in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17} are numbered {15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}, respectively. Figure 7 is a schematic diagram illustrating how to set the numbers of further candidate PSSCH transmission occasions according to an embodiment of the present application. As shown in FIG. 7, bit 0 of the 16 HARQ bits corresponds to candidate PSSCH transmission occasion number 0, and bit 1 of the 16 HARQ bits corresponds to candidate PSSCH transmission occasion number 1, and so on.

[0088] In Example 6, the first communication node is a terminal, the second communication node is a base station, and the terminal determines candidate PSSCH transmission occasions at the m-th PSFCH reception occasion and the final PSFCH reception occasion as an example to describe the feedback information transmission process. In this embodiment, the step of the terminal reporting HARQ-ACK information to the base station includes: determining slots including F≧1 PSFCH resources mapped to one slot n, where the slot including PSFCH resources includes M≧2 PSFCH resource subsets; and determining, for the slot including PSFCH resources, candidate PSSCH transmission occasions corresponding to at least one PSFCH resource subset included in the slot. For at least one slot including the PSFCH resources, determining a candidate PSSCH transmission occasion corresponding to a first PSFCH resource subset in the slot. For at least one slot including the PSFCH resources, determining candidate PSSCH transmission occasions corresponding to the first and second PSFCH resource subsets in the slot. Each PSFCH resource in the first PSFCH resource subset corresponds to the m-th PSFCH transmission occasion of one PSSCH, where m is an integer between [1, M), and each PSFCH resource in the second PSFCH resource subset corresponds to the final PSFCH transmission occasion of the M PSFCH transmission occasions corresponding to one PSSCH, and before determining the value of m, the terminal receives control information transmitted from the base station, and the terminal determines the value of m based on the received control information and reports HARQ-ACK information to the base station, where the HARQ-ACK information includes the HARQ-ACK information of the candidate PSSCH transmission occasions.

[0089] Next, the above process will be described in detail with reference to Fig. 4. The description of Fig. 4 itself refers to Example 1.

[0090] The terminal determines a slot including F≧1 PSFCH resources to be mapped to one slot n, and the slot including the PSFCH resources includes M≧2 PSFCH resource subsets. In Figure 4, the slots including F≧1 PSFCH resources mapped to slot n are three slots {X+19, X+15, X+11}. Each of the three slots includes M=2 PSFCH resource subsets, which are PSFCH resource subset 1 and PSFCH resource subset 2, respectively.

[0091] When M=2 and m=1, the first PSFCH resource subset corresponds to PSFCH resource subset 1 in Figure 4, and each PSFCH resource in PSFCH resource subset 1 corresponds to the m=1th PSFCH reception occasion of one PSSCH. The second PSFCH resource subset corresponds to PSFCH resource subset M (M=2) in Figure 4, and each PSFCH resource in PSFCH resource subset M=2 corresponds to the last PSFCH reception occasion of one PSSCH.

[0092] For M=2 and m=1, for slots X+19 and X+15 of slots {X+19, X+15, X+11}, the first PSFCH resource subset (PSFCH resource subset m=1) in slot X+19 that includes a PSFCH resource results in determined candidate PSSCH transmission occasions being located in slots {X+14, X+15, X+16, X+17}.The first PSFCH resource subset (PSFCH resource subset m=1) in slot X+15 that includes a PSFCH resource results in determined candidate PSSCH transmission occasions being located in slots {X+10, X+11, X+12, X+13}.

[0093] For M=2 and m=1, a candidate PSSCH transmission occasion is determined based on a first PSFCH resource subset (PSFCH resource subset m=1) and a second PSFCH resource subset (PSFCH resource subset M=2) in slot X+11 of slots {X+19, X+15, X+11} containing F≧1 PSFCH resources. The candidate PSSCH transmission occasion determined by the first PSFCH resource subset is located in slots {X+6, X+7, X+8, X+9}, and the candidate PSSCH transmission occasion determined by the second PSFCH resource subset is located in slots {X+2, X+3, X+4, X+5}. Therefore, in slot X+11, the candidate PSSCH transmission occasions determined based on the first PSFCH resource subset and the second PSFCH resource subset are located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9}.

[0094] To summarize, in slot {X+19, X+15, X+11} containing F≧1 PSFCH resources, all determined candidate PSSCH transmission occasions are located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}, respectively.

[0095] UE1 reports HARQ-ACK information to the base station, where the HARQ-ACK information includes HARQ-ACK information of the candidate PSSCH transmission occasions. The terminal feeds back 16 bits of HARQ-ACK to the base station, where each bit of HARQ-ACK corresponds to one candidate PSSCH transmission occasion among the candidate PSSCH transmission occasions located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}. The slot in which UE1 reports the HARQ-ACK information to the base station is slot n, and in slot n, the terminal reports the HARQ-ACK information to the base station via PUCCH or PUSCH.

[0096] Preferably, the candidate PSSCH transmission occasions are numbered, and the numbering rule is that among all candidate PSSCH transmission occasions determined by slots including the PSFCH resources where F≧1, the j-th candidate PSSCH transmission occasion from the back in time is numbered j. According to the numbering rule, the candidate PSSCH transmission occasions in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17} are numbered {15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0}, respectively. As shown in FIG. 7, bit 0 of the 16 HARQ bits corresponds to candidate PSSCH transmission occasion number 0, and bit 1 of the 16 HARQ bits corresponds to candidate PSSCH transmission occasion number 1, and so on.

[0097] Preferably, the terminal can determine the m value in the following manner:

[0098] The terminal receives control information transmitted from a base station, the control information including a PSFCH resource subset number, and determines, based on the received control information, that the value m is equal to the PSFCH resource subset number or equal to the PSFCH resource subset number plus 1; alternatively, the terminal receives control information transmitted from a base station, the control information including a number of PSFCH transmission / reception occasions, and determines, based on the received control information, that the value m is equal to the number of PSFCH transmission / reception occasions.

[0099] Preferably, the control information includes at least one of RRC signaling, SIB information, and DCI.

[0100] In Example 7, a method for a terminal reporting HARQ-ACK information to a base station includes: determining slots including F≧1 PSFCH resources mapped to one slot n, where the slot including the PSFCH resources includes M≧2 PSFCH resource subsets; determining candidate PSSCH transmission occasions for each of the slots including the PSFCH resources based on the slot; deleting some candidate PSSCH transmission occasions from target candidate PSSCH transmission occasions, which are a set of all candidate PSSCH transmission occasions determined in the slot including F≧1 PSFCH resources; and reporting HARQ-ACK information for the remaining candidate PSSCH transmission occasions to the base station after deleting some candidate PSSCH transmission occasions from the target candidate PSSCH transmission occasions.

[0101] Preferably, the slot including the PSFCH resource including M≧2 PSFCH resource subsets includes: in the one PSFCH resource subset, each PSFCH resource in the PSFCH resource subset corresponds to a first PSFCH reception occasion of one PSSCH; and in the one PSFCH resource subset, each PSFCH resource in the PSFCH resource subset corresponds to a second PSFCH reception occasion of one PSSCH, and by analogy therewith.

[0102] Next, the above process will be described in detail with reference to Fig. 4. The description of Fig. 4 itself refers to Example 1.

[0103] The terminal determines slots including F≧1 PSFCH resources to be mapped to one slot n, and the slots including the PSFCH resources include M≧2 PSFCH resource subsets. In Figure 4, the slots including F≧1 PSFCH resources mapped to slot n are three slots {X+19, X+15, X+11}. Each of the three slots includes M=2 PSFCH resource subsets, which are PSFCH resource subset 1 and PSFCH resource subset 2, respectively.

[0104] For each of the slots that include the PSFCH resource, determine candidate PSSCH transmission occasions based on the slot. All PSFCH resource subsets in slot X+19 include PSFCH resource subset 1 and PSFCH resource subset 2. The eight candidate PSSCH transmission occasions mapped to slot X+19 are located in slots {X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}. The eight candidate PSSCH transmission occasions mapped to slot X+15 are located in slots {X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13}. The eight candidate PSSCH transmission occasions mapped to slot X+11 are located in slots {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9}. A total of 24 candidate PSSCH transmission occasions are determined for all PSFCH-containing slots corresponding to slot n.

[0105] The terminal deletes some candidate PSSCH transmission occasions from the 24 candidate PSSCH transmission occasions (target candidate PSSCH transmission occasions) and reports HARQ-ACK information for the remaining candidate PSSCH transmission occasions to the base station. The terminal reports the HARQ-ACK information to the base station via the PUCCH or PUSCH in slot n.

[0106] Preferably, the terminal deletes candidate PSSCH transmission occasions with some overlapping slot numbers, leaving only 16 candidate PSSCH transmission occasions, whose corresponding slot numbers are {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}.

[0107] In Example 8, after deleting some of the candidate PSSCH transmission occasions in Example 7, the slot numbers corresponding to the remaining candidate PSSCH transmission occasions are {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}, respectively.

[0108] The remaining candidate PSSCH transmission occasions are numbered, and the numbering rule is that the j-th candidate PSSCH transmission occasion from the back in time among the remaining candidate PSSCH transmission occasions is numbered j.

[0109] Among the remaining candidate PSSCH transmission occasions, the zeroth candidate PSSCH transmission occasion from the back in time is numbered 0, and among the remaining candidate PSSCH transmission occasions, the first candidate PSSCH transmission occasion from the back in time is numbered 1, and so on.

[0110] The terminal feeds back a HARQ-ACK to the base station, and the fed back j-th bit HARQ-ACK is the HARQ-ACK of the candidate PSSCH transmission occasion with number j.

[0111] In Example 9, after deleting some of the candidate PSSCH transmission occasions in Example 7, the slot numbers corresponding to the remaining candidate PSSCH transmission occasions are {X+2, X+3, X+4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}, respectively.

[0112] The remaining candidate PSSCH transmission occasions are numbered.

[0113] The terminal feeds back N-bit HARQ-ACK information to the base station, and the 1-bit HARQ-ACK feedback corresponding to the j-th candidate PSSCH transmission occasion is placed at the j-th bit in the N-bit HARQ-ACK information.

[0114] By analogy, the 1-bit HARQ-ACK feedback corresponding to the candidate PSSCH transmission occasion numbered 0 is placed at the 0th bit in the N-bit HARQ-ACK information, and the 1-bit HARQ-ACK feedback corresponding to the candidate PSSCH transmission occasion numbered 1 is placed at the 1st bit in the N-bit HARQ-ACK information.

[0115] In Example 10, the description of the operations performed on the first communication node is as follows.

[0116] Based on the time domain position information of the PUCCH indicated by the DCI or RRC message, a PUCCH slot is determined; based on the timing relationship between the PSFCH and the PUCCH indicated by the DCI or RRC message, a group of PSFCH slots to be mapped to one PUCCH slot is determined; for each of the group of PSFCH slots, candidate PSSCH transmission occasions corresponding to each PSFCH slot are determined; and HARQ-ACK information is reported to the base station, where the HARQ-ACK information includes the HARQ-ACK information of the candidate PSSCH transmission occasions.

[0117] Preferably, the group of PSFCH slots is one of a set of first PSFCH occasions corresponding to the PSSCH, a set of last PSFCH occasions corresponding to the PSSCH, and a set of multiple PSFCH occasions corresponding to the PSSCH.

[0118] 8 is a schematic diagram of another slot configuration according to an embodiment of the present application. When the group of PSFCH slots is a set of the first PSFCH occasions corresponding to the PSSCH, the group of PSFCH slots is three slots corresponding to the first PSFCH occasion in FIG. 8. Candidate PSSCH transmission occasions corresponding to the three PSFCH slots correspond to slots {X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13, X+14, X+15, X+16, X+17}.

[0119] 9 is a schematic diagram illustrating further slot configuration according to an embodiment of the present application. When the group of PSFCH slots is a set of the last PSFCH occasions corresponding to the PSSCH, the group of PSFCH slots is three slots corresponding to the last (second) PSFCH occasions in FIG. 9. Candidate PSSCH transmission occasions corresponding to the three PSFCH slots correspond to slots {X+2, X+3, X4, X+5, X+6, X+7, X+8, X+9, X+10, X+11, X+12, X+13}.

[0120] In one embodiment, Figure 10 is a structural block diagram of an information transmission device according to an embodiment of the present application. This embodiment is applied to a first communication node. As shown in Figure 10, this embodiment includes a first determination module 1010, a second determination module 1020, and a transmitter 1030.

[0121] Here, the first determining module 1010 is configured to determine at least one second feedback slot to be mapped to the first feedback slot, where each second feedback slot includes at least two feedback resource subsets.

[0122] The second determining module 1020 is configured to determine candidate PSSCH transmission occasions corresponding to at least one feedback resource subset in each second feedback slot.

[0123] Transmitter 1030 is configured to transmit feedback information corresponding to the candidate PSSCH transmission occasions to a second communication node in the first feedback slot.

[0124] In one embodiment, the second feedback slot including at least two feedback resource subsets includes each feedback resource subset corresponding to one PSFCH reception occasion of a candidate PSFCH transmission occasion corresponding to each feedback resource in the respective feedback resource subset.

[0125] In one embodiment, the second determining module 1020 is configured to determine candidate PSSCH transmission occasions corresponding to one feedback resource subset in each of the second feedback slots, where each feedback resource in the one feedback resource subset corresponds to an initial PSSCH reception occasion corresponding to the candidate PSSCH transmission occasion.

[0126] In one embodiment, the second determining module 1020 is configured to determine a candidate PSSCH transmission occasion corresponding to one feedback resource subset in each of the second feedback slots, where each feedback resource in the one feedback resource subset corresponds to a final PSSCH reception occasion corresponding to the candidate PSSCH transmission occasion.

[0127] In one embodiment, the second determining module 1020 is configured to determine a candidate PSSCH transmission occasion corresponding to the m-th feedback resource subset in each of the second feedback slots, where 1≦m≦M, and M is the number of feedback resource subsets included in each of the second feedback slots.

[0128] In one embodiment, the second determination module 1020 is configured to determine candidate PSSCH transmission occasions corresponding to a first feedback resource subset in at least one second feedback slot, and to determine candidate PSSCH transmission occasions corresponding to the first feedback resource subset and a second feedback resource subset in at least one second feedback slot, where each feedback resource in the first feedback resource subset corresponds to the first PSFCH reception occasion of the candidate PSSCH transmission occasion, and each feedback resource in the second feedback resource subset corresponds to the last PSFCH reception occasion of the candidate PSSCH transmission occasion.

[0129] In one embodiment, the second determination module 1020 is configured to determine candidate PSSCH transmission occasions corresponding to a first feedback resource subset in at least one second feedback slot, and to determine candidate PSSCH transmission occasions corresponding to the first feedback resource subset and a second feedback resource subset in at least one second feedback slot, where each feedback resource in the first feedback resource subset corresponds to the m-th PSFCH reception occasion of the candidate PSSCH transmission occasion, 1 ≤ m < M, where M is the number of feedback resource subsets included in each second feedback slot, and each feedback resource in the second feedback resource subset is the last PSFCH reception occasion corresponding to the candidate PSSCH transmission occasion.

[0130] In one embodiment, the method for determining the m value includes determining the value of m based on the received control information.

[0131] In one embodiment, the information type of the control information includes at least one of the following: radio resource control (RRC) signaling, system information block (SIB) information, and downlink control information (DCI).

[0132] In one embodiment, the control information carries at least one of the number of the feedback resource subset and the number of PSFCH reception occasions.

[0133] In one embodiment, determining the value of m based on the received control information includes one of determining that the value of m is a feedback resource subset number, determining that the value of m is the feedback resource subset number plus 1, and determining that the value of m is the number of PSFCH receiving occasions.

[0134] In one embodiment, the number of the candidate PSSCH transmission occasions is determined by the periodicity value of the PSFCH, the f-th second feedback slots sorted in reverse time domain order, and the n-th second feedback slots mapped to the f-th second feedback slots. f Determining a number of the candidate PSSCH transmission occasions based on the second candidate PSSCH transmission occasion.

[0135] In one embodiment, the j-th candidate PSSCH transmission occasion among all the candidate PSSCH transmission occasions sorted in reverse time domain order has number j.

[0136] In one embodiment, the bit number of the feedback information is equal to the number of the candidate PSSCH transmission occasions.

[0137] In one embodiment, the candidate PSSCH transmission occasions are sorted in order of time domain, and for the first second feedback slot, the candidate PSSCH transmission occasions are the candidate PSSCH transmission occasions corresponding to the first feedback resource subset and the second feedback resource subset; and the candidate PSSCH transmission occasions are sorted in order of time domain, and for the second feedback slots other than the first second feedback slot, the candidate PSSCH transmission occasions are the candidate PSSCH transmission occasions corresponding to the first feedback resource subset.

[0138] In one embodiment, the first determination module 1010 includes: a first determination unit configured to determine a first feedback slot based on time-domain location information of a PUCCH indicated by a DCI or an RRC message; and a second determination unit configured to determine at least one second feedback slot to be mapped to the first feedback slot based on a timing relationship between a PSFCH and a PUCCH indicated by a DCI or an RRC message, wherein the first feedback slot is a PUCCH slot, the at least one second feedback slot is a slot including a PSFCH resource, and the at least two feedback resource subsets are PSFCH resource subsets.

[0139] The information transmission device of this embodiment is configured to realize the information transmission method of the embodiment shown in Figure 2, and the realization principle and technical effects of the information transmission device of this embodiment are similar, so the description will be omitted here.

[0140] In one embodiment, Figure 11 is a structural block diagram of another information transmission device according to an embodiment of the present application. This embodiment is applied to a second communication node. As shown in Figure 11, this embodiment includes a receiver 1110.

[0141] The receiver 1110 is configured to receive feedback information corresponding to a candidate PSSCH transmission occasion sent from a first communication node in a first feedback slot.

[0142] The information transmission device of this embodiment is configured to realize the information transmission method of the embodiment shown in Figure 3, and the realization principle and technical effects of the information transmission device of this embodiment are similar, so the description will be omitted here.

[0143] FIG. 12 is a structural diagram of an information transmission device according to an embodiment of the present application. As shown in FIG. 12, the device according to the present application includes a processor 1210 and a memory 1220. The number of processors 1210 in the device may be one or more, and FIG. 12 takes one processor 1210 as an example. The number of memories 1220 in the device may be one or more, and FIG. 12 takes one memory 1220 as an example. The processor 1210 and memory 1220 of the device may be connected via a bus or other manner, and FIG. 12 takes a bus connection as an example. In this embodiment, the device may be a terminal (e.g., user equipment).

[0144] The memory 1220 can be used as a computer-readable storage medium to store software programs, computer-executable programs, and modules, such as program instructions / modules corresponding to the device of any embodiment of the present application (e.g., the first determination module 1010, the second determination module 1020, and the transmitter 1030 in an information transmission device). The memory 1220 may include a program storage area and a data storage area, where the program storage area can store an operating system and / or application programs required for at least one function, and the data storage area can store data generated based on the use of the device. The memory 1220 may also include high-speed random access memory and may further include non-volatile memory, such as at least one magnetic disk storage device, flash memory, or other non-volatile solid-state storage device. In some embodiments, the memory 1220 can include memory located remotely from the processor 1210, and these remote memories can be connected to the device via a network. Examples of such networks may include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0145] When the information transmission device is a first communication node, the above-mentioned device can be configured to execute the information transmission method applied to the first communication node according to any of the above embodiments, and has corresponding functions and effects.

[0146] When the information transmission device is a second communication node, the above-mentioned device is configured to execute the information transmission method applied to the second communication node according to any of the above embodiments, and has corresponding functions and effects.

[0147] An embodiment of the present application further provides a storage medium including computer-executable instructions, which, when executed by a computer processor, are used to perform an information transmission method applied to a first communication node, the method including: determining at least one second feedback slot mapped to a first feedback slot, each second feedback slot including at least two feedback resource subsets; determining candidate PSSCH transmission occasions corresponding to the at least one feedback resource subset in each second feedback slot; and transmitting feedback information corresponding to the candidate PSSCH transmission occasions in the first feedback slot to a second communication node.

[0148] An embodiment of the present application further provides a storage medium including computer-executable instructions, which, when executed by a computer processor, are used to perform an information transmission method applied to a second communication node, the method including receiving, in a first feedback slot, feedback information corresponding to a candidate PSSCH transmission occasion sent from the first communication node.

[0149] Those skilled in the art will appreciate that the term user terminal includes any suitable type of wireless user equipment, including, for example, a mobile phone, a portable data processing device, a portable network browser, or a vehicle mounted mobile station.

[0150] In general, various embodiments of the present application may be implemented in hardware or special purpose circuits, software, logic, or any combination thereof. For example, some aspects may be implemented in hardware while other aspects may be implemented in firmware or software executable by a controller, microprocessor, or other computing device, and the present application is not limited thereto.

[0151] Embodiments of the present application may be implemented by execution of computer program instructions by a data processor of a mobile device, for example in a processor entity, by hardware, or by a combination of software and hardware. The computer program instructions may be assembly instructions, Instruction Set Architecture (ISA) instructions, machine instructions, machine-related instructions, microcode, firmware instructions, state setting data, or source or target code written in any combination of one or more programming languages.

[0152] Any logic flow block diagrams in the drawings of this application may represent program steps, interconnected logic circuits, modules, and functions, or combinations of program steps and logic circuits, modules, and functions. Computer programs may be stored in memory. The memory may be of any type suitable for the local technology environment and may be implemented with any appropriate data storage technology. For example, the memory may include, but is not limited to, read-only memory (ROM), random access memory (RAM), optical storage devices and systems (Digital Versatile Discs (DVDs) or Compact Discs (CDs)), etc. The computer-readable medium may include a non-transitory storage medium. The data processor may be of any type suitable for the local technology environment, such as, but not limited to, a general purpose computer, a special purpose computer, a microprocessor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), and a processor based on a multi-core processor architecture.

[0153] The above is only a preferred embodiment of the present invention, and does not limit the present application, and various modifications and variations are possible for those skilled in the art in the present application. Any modifications, equivalent replacements, improvements, etc. made within the principle of the present application shall be included in the protection scope of the present application.

Claims

1. An information transmission method applied to a first communication node, comprising: determining at least one second feedback slot mapped to the first feedback slot, each second feedback slot including at least two feedback resource subsets; determining candidate PSSCH (Physical Sidelink Shared Channel) transmission occasions corresponding to at least one feedback resource subset in each second feedback slot; and transmitting feedback information corresponding to the candidate PSSCH transmission occasions to a second communication node in the first feedback slot; Determining candidate PSSCH transmission occasions corresponding to at least one feedback resource subset in each second feedback slot includes: determining a candidate PSSCH transmission occasion corresponding to one feedback resource subset in each second feedback slot; Each feedback resource in the one feedback resource subset corresponds to a final PSFCH reception occasion corresponding to the candidate PSFCH transmission occasion. Information transmission method.

2. Each second feedback slot includes at least two feedback resource subsets, each feedback resource subset corresponding to one physical sidelink feedback channel (PSFCH) reception occasion of a candidate PSFCH transmission occasion corresponding to each feedback resource in the respective feedback resource subset.

2. The information transmission method according to claim 1.

3. The method of determining the candidate PSSCH transmission occasion numbers is as follows: The periodicity value of the PSFCH, the f-th second feedback slot sorted in reverse order in the time domain, and n second feedback slots mapped to the f-th second feedback slot. ｆ determining a number of candidate PSSCH transmission occasions based on the second candidate PSSCH transmission occasion; 2. The information transmission method according to claim 1.

4. Among all candidate PSSCH transmission occasions, the j-th candidate PSSCH transmission occasion sorted in reverse time domain order has number j.

2. The information transmission method according to claim 1.

5. The bit number of the feedback information is equal to the number of the candidate PSSCH transmission occasion.

2. The information transmission method according to claim 1.

6. Determining at least one second feedback slot mapped to the first feedback slot includes: Determining a first feedback slot according to time domain location information of a physical uplink control channel (PUCCH) indicated by a DCI or an RRC message; determining at least one second feedback slot to be mapped to the first feedback slot based on a timing relationship between a PSFCH and a PUCCH indicated by a DCI or an RRC message; the first feedback slot is one PUCCH slot, the at least one second feedback slot is a slot including a PSFCH resource, and the at least two feedback resource subsets are PSFCH resource subsets.

2. The information transmission method according to claim 1.

7. An information transmission method applied to a second communication node, comprising: receiving feedback information corresponding to candidate PSSCH (Physical Sidelink Shared Channel) transmission occasions sent from a first communication node in a first feedback slot, the first feedback slot is used to map at least one second feedback slot, the at least one second feedback slot being determined by the first communication node, and each second feedback slot including at least two feedback resource subsets; the candidate PSSCH transmission occasions correspond to one feedback resource subset in each second feedback slot, and the candidate PSSCH transmission occasions are determined by the first communication node; Each feedback resource in the one feedback resource subset corresponds to a final PSFCH reception occasion corresponding to the candidate PSFCH transmission occasion. Information transmission method.

8. a memory and at least one processor; the memory is configured to store at least one program; When the at least one program is executed by the at least one processor, the at least one processor realizes the information transmission method according to any one of claims 1 to 6 or the information transmission method according to claim 7. Information transmission equipment.

9. A computer program is stored which, when executed by a processor, realizes the information transmission method according to any one of claims 1 to 6 or the information transmission method according to claim 7. storage medium.

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