An information transmission method, apparatus, device, chip and storage medium

Abstract

An information transmission method is provided in the embodiments of the present application, which comprises: sending, to a second terminal, a plurality of physical sidelink shared channels (PSSCHs) and a physical sidelink control channel (PSCCH) associated with the plurality of PSSCHs on a plurality of carrier components (CCs); wherein the PSFCH resources corresponding to the plurality of PSSCHs are located on part of the plurality of CCs. That is, the first terminal can use the plurality of CCs for sending the PSSCHs and the PSCCH, and the PSFCH resources corresponding to the sent PSSCHs can be concentrated on part of the plurality of CCs. In this way, for the other CCs in the plurality of CCs other than the part of the CCs, the corresponding PSFCH resources can not be configured, thus part of the symbols can be saved for the transmission of the PSSCHs and the PSCCH (or the transmission of data), thereby improving the overall resource utilization and data transmission efficiency on the plurality of CCs.

Description

Information transmission method, device, equipment, chip and storage medium Technical Field

[0001] The embodiments of the present application relate to the field of communication technology, and specifically to an information transmission method, apparatus, device, chip, and storage medium. Background Art

[0002] In current sidelink (SL) technology, carrier aggregation supports feedback, and each component carrier (CC) is configured with a Physical Sidelink Feedback Channel (PSFCH) resource. Within a timeslot, the PSFCH resource must occupy at least two symbols, which cannot be used for data transmission. Therefore, in carrier aggregation scenarios, a large number of symbols cannot be used for data transmission, resulting in low resource utilization.

[0003] Summary of the Invention

[0004] Embodiments of the present application provide an information transmission method, apparatus, device, chip, and storage medium.

[0005] In a first aspect, an embodiment of the present application provides an information transmission method, applied to a first terminal, the method comprising: sending multiple physical sidelink shared channels PSSCH and physical sidelink control channels PSCCH associated with the multiple PSSCHs to a second terminal on multiple carrier components CC; wherein the PSFCH resources corresponding to the multiple PSSCHs are located on some CCs among the multiple CCs.

[0006] In the second aspect, an embodiment of the present application provides an information transmission method, which is applied to a second terminal, the method comprising: receiving multiple physical sidelink shared channels PSSCH from a first terminal on multiple carrier components CC, and a physical sidelink control channel PSCCH associated with the multiple PSSCHs; wherein the PSFCH resources corresponding to the multiple PSSCHs are located on some CCs among the multiple CCs.

[0007] In a third aspect, an embodiment of the present application provides an information transmission method, which is applied to a first terminal, the method comprising: sending a physical sidelink shared channel PSSCH and a physical sidelink control channel PSCCH associated with the PSSCH on a first carrier component CC, the retransmission resources of the PSSCH are located in a second CC, and the second CC is indicated by the PSCCH.

[0008] In a fourth aspect, an embodiment of the present application provides an information transmission method, which is applied to a second terminal, the method comprising: receiving a physical side control channel PSCCH from a first terminal, transmitting the PSCCH and the physical side shared channel PSSCH associated with the PSCCH through a first carrier component CC, and the retransmission resources of the PSSCH are located in a second CC, which is indicated by the PSCCH.

[0009] In the fifth aspect, an embodiment of the present application provides an information transmission device, which includes: a first sending unit, configured to send multiple physical sidelink shared channels PSSCH and physical sidelink control channels PSCCH associated with the multiple PSSCHs to a second terminal on multiple carrier components CC; wherein, the PSFCH resources corresponding to the multiple PSSCHs are located on some CCs among the multiple CCs.

[0010] In the sixth aspect, an embodiment of the present application provides an information transmission device, which includes: a first receiving unit, configured to receive multiple physical sidelink shared channels PSSCH from a first terminal on multiple carrier components CC, and a physical sidelink control channel PSCCH associated with the multiple PSSCHs; wherein the PSFCH resources corresponding to the multiple PSSCHs are located on some CCs among the multiple CCs.

[0011] In the seventh aspect, an embodiment of the present application provides an information transmission device, which includes: a second sending unit, configured to send a physical sidelink shared channel PSSCH and a physical sidelink control channel PSCCH associated with the PSSCH on a first carrier component CC, the retransmission resources of the PSSCH are located in the second CC, and the second CC is indicated by the PSCCH.

[0012] In the eighth aspect, an embodiment of the present application provides an information transmission device, which includes: a second receiving unit, configured to receive a physical side control channel PSCCH from a first terminal, the PSCCH and the physical side shared channel PSSCH associated with the PSCCH are transmitted through a first carrier component CC, and the retransmission resources of the PSSCH are located in a second CC, and the second CC is indicated by the PSCCH.

[0013] In the ninth aspect, an embodiment of the present application provides a communication device, comprising: a memory for storing a computer program; a processor connected to the memory, for calling and running the computer program from the memory, to implement the method described in any one of the first to fourth aspects; and a transceiver for receiving and sending information during the process of sending and receiving information between other devices.

[0014] In a tenth aspect, embodiments of the present application provide a chip. The chip includes: a processor configured to load and execute a computer program from a memory, causing a device equipped with the chip to execute the method described in any one of aspects 1 to 4; and a transceiver configured to transmit and receive information during the process of transmitting and receiving information to and from the device or chip.

[0015] In an eleventh aspect, an embodiment of the present application provides a computer-readable storage medium for storing a computer program, which enables a computer to execute the method described in any one of the first to fourth aspects.

[0016] In a twelfth aspect, an embodiment of the present application provides a computer program product, comprising computer program instructions, which enable a computer to execute the method described in any one of the first to fourth aspects.

[0017] In a thirteenth aspect, an embodiment of the present application provides a computer program, which, when executed on a computer, enables the computer to execute the method described in any one of the first to fourth aspects.

[0018] Through the above technical solution, the first terminal can send multiple PSSCHs and PSCCHs associated with the multiple PSSCHs on multiple CCs, wherein the PSFCH resources corresponding to the multiple PSSCHs can be located on some CCs among the multiple CCs. In other words, the first terminal can use multiple CCs for the transmission of PSSCHs and PSCCHs, and the PSFCH resources corresponding to the transmitted PSSCHs can be concentrated on some CCs among the multiple CCs. In this way, for CCs other than the part of CCs in the multiple CCs, it is not necessary to configure corresponding PSFCH resources, so some symbols can be saved for the transmission of PSSCHs and PSCCHs (or for the transmission of data), thereby improving the overall resource utilization and data transmission efficiency on the multiple CCs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] FIG1 is a schematic diagram of sideline communication within network coverage provided by an embodiment of the present application;

[0021] FIG2 is a schematic diagram of sideline communication with partial network coverage provided by an embodiment of the present application;

[0022] FIG3 is a schematic diagram of sideline communication outside network coverage provided by an embodiment of the present application;

[0023] FIG4 is a schematic diagram of sideline communication with a central control node provided in an embodiment of the present application;

[0024] FIG5 is a schematic diagram of a unicast transmission method provided in an embodiment of the present application;

[0025] FIG6 is a schematic diagram of a multicast transmission method provided in an embodiment of the present application;

[0026] FIG7 is a schematic diagram of a broadcast transmission method provided in an embodiment of the present application;

[0027] FIG8 is a schematic diagram of the time slot structure in NR-V2X provided in an embodiment of the present application;

[0028] FIG9 is a schematic diagram showing changes in the OFDM symbols available in a time slot of a PSSCH in different transmissions provided by an embodiment of the present application;

[0029] FIG10 is a schematic diagram of a second-order SCI mapping method provided in an embodiment of the present application;

[0030] FIG11 is a schematic diagram of the time-frequency domain position of a PSCCH DMRS provided in an embodiment of the present application;

[0031] FIG12 is a schematic diagram of the time domain position of 4 DMRS symbols when the PSSCH has 13 symbols provided in an embodiment of the present application;

[0032] FIG13 is a schematic diagram of a single-symbol DMRS frequency domain type 1 provided in an embodiment of the present application;

[0033] FIG14 is a schematic diagram of the time-frequency position of the SL CSI-RS provided in an embodiment of the present application;

[0034] FIG15 is a schematic diagram of an example of channel occupancy time and channel occupancy provided in an embodiment of the present application;

[0035] FIG16 is a flowchart of an information transmission method according to an embodiment of the present application;

[0036] FIG17 is a second flow chart of the information transmission method provided in an embodiment of the present application;

[0037] FIG18 is a schematic diagram of an implementation scheme of the information transmission method provided in an embodiment of the present application;

[0038] FIG19 is a second schematic diagram of an implementation scheme of the information transmission method provided in an embodiment of the present application;

[0039] FIG20 is a third schematic diagram of an implementation scheme of the information transmission method provided in an embodiment of the present application;

[0040] FIG21 is a fourth schematic diagram of an implementation scheme of the information transmission method provided in an embodiment of the present application;

[0041] FIG22 is a fifth schematic diagram of an implementation scheme of the information transmission method provided in an embodiment of the present application;

[0042] FIG23 is a schematic diagram of the first structure of the information transmission device provided in an embodiment of the present application;

[0043] FIG24 is a second schematic diagram of the structure of the information transmission device provided in an embodiment of the present application;

[0044] FIG25 is a third schematic diagram of the structure of the information transmission device provided in an embodiment of the present application;

[0045] FIG26 is a fourth schematic diagram of the structure of the information transmission device provided in an embodiment of the present application;

[0046] FIG27 is a schematic structural diagram of a communication device provided in an embodiment of the present application;

[0047] Figure 28 is a schematic structural diagram of the chip of an embodiment of the present application. DETAILED DESCRIPTION

[0048] The following will describe the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0049] The technical solutions of the embodiments of the present application can be applied to various side communication systems. To facilitate understanding of the technical solutions of the embodiments of the present application, the relevant technologies of the embodiments of the present application are explained below. The following related technologies can be arbitrarily combined with the technical solutions of the embodiments of the present application as optional solutions, and they all fall within the protection scope of the embodiments of the present application.

[0050] 1. Sideline communication in different network coverage environments

[0051] In side communication, according to the network coverage of the communicating terminal, it can be divided into side communication within the network coverage, side communication with partial network coverage, side communication outside the network coverage, and side communication with a central control node, as shown in Figures 1, 2, 3 and 4 respectively.

[0052] As shown in FIG1 , in sideline communications within network coverage, all terminals performing sideline communications are within the coverage of the same base station. Thus, the above terminals can perform sideline communications based on the same sideline configuration by receiving configuration signaling from the base station.

[0053] As shown in Figure 2, in the case of sidelink communication with partial network coverage, some terminals performing sidelink communication are located within the coverage of the base station. These terminals can receive the configuration signaling from the base station and perform sidelink communication according to the configuration of the base station. However, terminals located outside the network coverage cannot receive the configuration signaling from the base station. In this case, the terminals outside the network coverage will determine the sidelink configuration based on the pre-configuration information and the information carried in the Physical Sidelink Broadcast Channel (PSBCH) sent by the terminals within the network coverage, thereby performing sidelink communication.

[0054] As shown in FIG3 , for sideline communications outside network coverage, all terminals performing sideline communications are located outside network coverage, and all terminals determine sideline configurations according to pre-configured information and perform sideline communications.

[0055] As shown in Figure 4 , for sideline communication with a central control node, multiple terminals form a communication group, which includes a central control node, such as UE1 in Figure 4 . The central control node can also be called a cluster header (CH). The central control node has at least one of the following functions, but is not limited to: establishing the communication group; managing the joining and leaving of group members; coordinating resources, allocating sideline transmission resources to other terminals, receiving sideline feedback information from other terminals, and coordinating resources with other communication groups.

[0056] 2. Device to Device (D2D) / Vehicle to Everything (V2X)

[0057] Device-to-device communication is a sidelink transmission technology based on D2D. Unlike traditional cellular systems, where communication data is received or sent via base stations, it offers higher spectrum efficiency and lower transmission latency. The connected vehicle system utilizes direct end-to-end communication. The 3rd Generation Partnership Project (3GPP) defines two transmission modes: Mode 1 and Mode 2.

[0058] Mode 1: The terminal's transmission resources are allocated by the base station, and the terminal transmits data on the sidelink based on the allocated resources. The base station can allocate resources for either single transmissions or semi-static transmissions. As shown in Figure 1, when the terminal is within network coverage, the network allocates transmission resources for sidelink transmissions.

[0059] Mode 2: The terminal selects a resource from the resource pool for data transmission. As shown in Figure 3, when the terminal is outside the cell coverage area, it autonomously selects a transmission resource from the pre-configured resource pool for sidelink transmission. Alternatively, as shown in Figure 1, the terminal autonomously selects a transmission resource from the network-configured resource pool for sidelink transmission.

[0060] 3. New Radio-Vehicle to Everything (NR-V2X)

[0061] In NR-V2X, autonomous driving needs to be supported, which places higher requirements on data interaction between vehicles, such as higher throughput, lower latency, higher reliability, larger coverage, and more flexible resource allocation.

[0062] LTE-V2X supports broadcast transmission, while NR-V2X introduces unicast and multicast transmission modes. For unicast transmission, there is only one receiving terminal. For example, in Figure 5, unicast transmission is performed between UE1 and UE2. For multicast transmission, the receiving terminals are all terminals in a communication group, or all terminals within a certain transmission distance. As shown in Figure 6, UE1, UE2, UE3, and UE4 form a communication group, where UE1 transmits data, and the other terminal devices in the group are all receiving terminals. For broadcast transmission, the receiving terminal is any terminal around the transmitting terminal. As shown in Figure 7, UE1 is the transmitting terminal, and the other terminals around it, UE2 to UE6, are all receiving terminals.

[0063] 4. NR-V2X system frame structure

[0064] The time slot structure in NR-V2X is shown in Figure 8:

[0065] FIG8(a) is a schematic diagram of a time slot structure in which a physical sidelink feedback channel (PSFCH) is not included in the time slot; FIG8(b) is a schematic diagram of a time slot structure in which a PSFCH is included.

[0066] The NR-V2X Physical Sidelink Control Channel (PSCCH) starts at the second sidelink symbol of the timeslot in the time domain, occupies 2 or 3 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and can occupy {10, 12, 15, 20, 25} Physical Resource Blocks (PRBs) in the frequency domain. To reduce the complexity of blind detection of the PSCCH by the user equipment (UE), only one number of PSCCH symbols and PRBs is allowed to be configured in a resource pool. In addition, because the subchannel is the minimum granularity for the allocation of physical sidelink shared channel (PSSCH) resources in NR-V2X, the number of PRBs occupied by the PSCCH must be less than or equal to the number of PRBs contained in a subchannel in the resource pool to avoid additional restrictions on PSSCH resource selection or allocation. In the time domain, the PSSCH also begins with the second sidelink symbol of the timeslot. The last time-domain symbol in the timeslot is the guard period (GP) symbol, and the remaining symbols are mapped to the PSSCH. The first sidelink symbol in the timeslot is a repetition of the second sidelink symbol. The receiving terminal typically uses the first sidelink symbol as an automatic gain control (AGC) symbol; the data on this symbol is not typically used for data demodulation. In the frequency domain, the PSSCH occupies K subchannels, each consisting of N consecutive PRBs.

[0067] When a time slot contains a PSFCH channel, the second to last and third to last symbols in the time slot are used for PSFCH channel transmission, and a time domain symbol before the PSFCH channel is used as a GP symbol, as shown in FIG8 (b).

[0068] 5. Sidelink PSSCH

[0069] In NR-V2X, the PSSCH is used to carry second-order sidelink control information (SCI) (SCI 2-A or SCI 2-B) and data information. The second-order SCI uses polarization coding and fixed quadrature phase shift keying (QPSK) modulation. The data portion of the PSSCH uses low-density parity check (LDPC) code, and the highest supported modulation order is 256QAM.

[0070] In NR-V2X, PSSCH supports up to two stream transmissions and uses a unit precoding matrix to map data on two layers to two antenna ports. At most, only one transport block (TB) can be sent in a PSSCH. However, unlike the transmission method of the PSSCH data part, when PSSCH adopts a dual-stream transmission method, the modulation symbols sent by the second-order SCI on the two streams are exactly the same. This design can ensure the reception performance of the second-order SCI in highly correlated channels.

[0071] Since the maximum number of retransmissions of a PSSCH in NR-V2X is 32, if there are PSFCH resources in the resource pool and the configuration period of PSFCH resources is 2 or 4, the available OFDM symbols in the time slot where different transmissions of a PSSCH are located may change, as shown in Figure 9. If calculated based on the actual number of OFDM symbols in a time slot The difference in the number of symbols available for PSSCH transmission in a time slot may cause Q′ SCI2 Different, and Q′ SCI2 The change of will lead to the change of the size of the TB carried by PSSCH. In order to ensure that the transmission block size (TBS) remains unchanged during multiple transmissions of PSSCH, The actual number of PSFCH symbols is not used. The number of resource elements (REs) occupied by the PSSCH demodulation reference signal (DMRS) and the number of REs occupied by the phase-tracking reference signal (PT-RS), which may change during the retransmission process, are not taken into account.

[0072] The code rate of the second-order SCI can be dynamically adjusted within a certain range. The specific code rate used is indicated by the first-order SCI, so the receiver does not need to perform blind detection of the second-order SCI even after the code rate changes. The modulation symbols of the second-order SCI are mapped in the frequency domain first and then in the time domain, starting from the symbol containing the first PSSCH DMRS. In the OFDM symbol containing the DMRS, the second-order SCI is mapped to the REs not occupied by the DMRS, as shown in Figure 10.

[0073] The data portion of the PSSCH within a resource pool can use multiple different modulation and coding scheme (MCS) tables, including the conventional 64QAM MCS table, the 256QAM MCS table, and the low-spectrum-efficiency 64QAM MCS table. The specific MCS table used in a transmission is indicated by the "MCS table indication" field in the first-order SCI. To control the Peak to Average Power Ratio (PAPR), the PSSCH must be transmitted using contiguous PRBs. Since the subchannel is the minimum frequency-domain resource granularity of the PSSCH, this requires that the PSSCH must occupy contiguous subchannels.

[0074] 6. Sidelink transmission block size

[0075] PSSCH follows the transport block size (TBS) determination mechanism of the physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) in the New Radio (NR), that is, the TBS is determined based on the reference value of the number of REs used for PSSCH in the time slot where the PSSCH is located, so that the actual code rate is as close to the target code rate as possible. The purpose of using the reference value of the number of REs instead of the actual number of REs here is to ensure that the number of REs used to determine the TBS remains unchanged during the PSSCH retransmission process, so that the determined TBS size is the same. To achieve this goal, the reference value N of the number of REs occupied by PSSCH in the TBS determination process is used. RE Determine according to formula (1):

[0076] where n PRB is the number of PRBs occupied by PSSCH, is the number of REs occupied by the first-order SCI (including the REs occupied by the DMRS of the PSCCH), is the number of REs occupied by the second-order SCI, N′ RErepresents the number of reference REs that can be used for PSSCH in a PRB, which is determined by formula (2):

[0077] in: Indicates the number of subcarriers in a PRB; Indicates the number of symbols available for sidelink in a time slot, excluding the last GP symbol and the first symbol used for AGC. or 3. The specific value is indicated by the "PSFCH symbol number" field in the first-order SCI, which is the reference value of the number of symbols occupied by PSFCH. The value of is configured by the Radio Resource Control (RRC) layer parameters and is used to indicate the reference value of the number of REs occupied by PT-RS and CSI-RS. It represents the average number of DMRS REs in a time slot and is related to the DMRS patterns allowed in the resource pool, as shown in Table 1.

[0078] Table 1 DMRS patterns allowed in the resource pool and The corresponding relationship

[0079] 7. Sidelink DMRS

[0080] In NR-V2X, the DMRS pattern of the PSCCH is the same as that of the NR physical downlink control channel (PDCCH). That is, the DMRS exists in each OFDM symbol of the PSCCH and is located in the frequency domain at {#1, #5, #9} REs of a PRB, as shown in Figure 11. The DMRS sequence of the PSCCH is generated by formula (3):

[0081] The pseudo-random sequence c(m) is given by Initialize, where l is the index of the OFDM symbol where the DMRS is located in the time slot, is the index of the time slot where the DMRS is located in the system frame, Indicates the number of OFDM symbols in a time slot, N ID ∈{0,1,…,65535}, in a resource pool N ID The specific value is configured or pre-configured by the network.

[0082] NR-V2X draws on the design of the NR Uu interface and adopts multiple time-domain PSSCH DMRS patterns. The number of available DMRS patterns within a resource pool is related to the number of PSSCH symbols in the resource pool. For a specific number of PSSCH symbols (including the first AGC symbol) and PSCCH symbols, the available DMRS patterns and the position of each DMRS symbol within the pattern are shown in Table 2. Figure 12 shows a schematic diagram of the time-domain position of four DMRS symbols when the PSSCH has 13 symbols.

[0083] Table 2 Number and position of DMRS symbols under different PSSCH and PSCCH symbol numbers

[0084] If multiple time-domain DMRS patterns are configured within the resource pool, the transmitting UE selects the specific time-domain DMRS pattern to use and indicates this in the first-order SCI. This design allows high-speed UEs to select a high-density DMRS pattern, thereby ensuring accurate channel estimation, while low-speed UEs can use a low-density DMRS pattern, thereby improving spectrum efficiency.

[0085] The generation method of the PSSCH DMRS sequence is almost identical to that of the PSCCH DMRS sequence. The only difference is the initialization formula c(m) of the pseudo-random sequence. init middle, p i The i-th cyclic redundancy check (CRC) of the PSCCH that schedules the PSSCH, where L=24 is the number of bits of the PSCCH CRC.

[0086] NR PDSCH and PUSCH support two frequency-domain DMRS patterns: DMRS frequency-domain Type 1 and DMRS frequency-domain Type 2. Each frequency-domain type has two different types: single DMRS symbol and dual DMRS symbol. Single-symbol DMRS frequency-domain Type 1 supports four DMRS ports, while single-symbol DMRS frequency-domain Type 2 supports six DMRS ports. With dual DMRS symbols, the number of supported ports is doubled. However, in NR-V2X, since PSSCH only needs to support a maximum of two DMRS ports, only single-symbol DMRS frequency-domain Type 1 is supported, as shown in Figure 13.

[0087] 8. Sidelink Channel State Information Reference Signal (CSI-RS)

[0088] To better support unicast communication, NR-V2X supports SL CSI-RS. SL CSI-RS is sent only when the following three conditions are met:

[0089] 1) The UE sends the corresponding PSSCH, that is, the UE cannot only send SL CSI-RS;

[0090] 2) Sidelink CSI reporting is activated by higher-layer signaling;

[0091] 3) When sidelink CSI reporting is activated by higher layer signaling, the corresponding bit in the second-order SCI sent by the UE triggers the sidelink CSI reporting.

[0092] The maximum number of ports supported by SL CSI-RS is two. For two ports, SL CSI-RSs from different ports are code-division multiplexed across two adjacent REs in the same OFDM symbol. Within a PRB, the number of SL CSI-RSs per port is one, meaning the density is one. Therefore, within a PRB, an SL CSI-RS appears in at most one OFDM symbol, the specific location of which is determined by the transmitting terminal. To avoid impacting the resource mapping of the PSCCH and second-order SCI, the SL CSI-RS cannot be located in the same OFDM symbol as the PSCCH and second-order SCI. Because the channel estimation accuracy of the OFDM symbol where the PSSCH DMRS resides is higher, and the SL CSI-RSs for two ports occupy two consecutive REs in the frequency domain, the SL CSI-RS cannot be transmitted in the same OFDM symbol as the PSSCH DMRS. The OFDM symbol location of the SL CSI-RS is indicated by the sl-CSI-RS-FirstSymbol parameter in the PC5RRC protocol.

[0093] The position of the first RE occupied by the SL CSI-RS within a PRB is indicated by the sl-CSI-RS-FreqAllocation parameter in the PC5RRC. If the SL CSI-RS is a single port, this parameter is a 12-bit bitmap corresponding to the 12 REs within a PRB. If the SL CSI-RS is a dual port, this parameter is a 6-bit bitmap. In this case, the SL CSI-RS occupies two REs, 2f(1) and 2f(1)+1, where f(1) represents the index of the bit with a value of 1 in the bitmap. The frequency domain position of the SL CSI-RS is also determined by the transmitting terminal, but the determined frequency domain position of the SL CSI-RS cannot conflict with the PT-RS. FIG14 shows a schematic diagram of the time-frequency position of an SL CSI-RS. In FIG14 , the number of SL CSI-RS ports is 2, the sl-CSI-RS-FirstSymbol is 8, and the sl-CSI-RS-FreqAllocation is [b5, b4, b3, b2, b1, b0] = [0, 0, 0, 1, 0, 0].

[0094] 9. 5G unlicensed (unlicensed) spectrum communications (NR-unlicensed, NR-U)

[0095] The NR system introduced by the 3GPP R15 standard is a communication technology for use on existing and new licensed spectrum. The NR system can achieve seamless coverage, high spectrum efficiency, high peak rate and high reliability of cellular networks. In the Long Term Evolution (LTE) system, unlicensed spectrum (or unlicensed spectrum) has been used as a supplementary frequency band to the licensed spectrum for cellular networks. Similarly, the NR system can also use unlicensed spectrum as part of 5G cellular network technology to provide services to users. In the 3GPP R16 standard, the NR system for unlicensed spectrum, called NR-unlicensed (NR-U), was discussed.

[0096] The NR-U system supports two networking modes: licensed spectrum assisted access and unlicensed spectrum independent access. The former requires the use of licensed spectrum to access the network, and the unlicensed spectrum is used as a secondary carrier; the latter can be independently networked through unlicensed spectrum, and the UE can directly access the network through the unlicensed spectrum. The range of unlicensed spectrum used by the NR-U system introduced in 3GPP R16 is concentrated in the 5GHz and 6GHz frequency bands, such as 5925-7125MHz in the United States, or 5925-6425MHz in Europe. In the R16 standard, band 46 (5150MHz-5925MHz) is newly defined for use as unlicensed spectrum.

[0097] Unlicensed spectrum is spectrum designated by countries and regions for use by radio equipment. This spectrum is generally considered shared spectrum, meaning that as long as communications devices meet national or regional regulatory requirements for the spectrum, they can use it without having to apply for exclusive spectrum authorization from the national or regional spectrum management agency. Because the use of unlicensed spectrum must comply with specific national and regional regulations, such as the "Listen Before Talk" (LBT) principle, NR technology requires corresponding enhancements to meet regulatory requirements for unlicensed frequency bands and efficiently utilize unlicensed spectrum to provide services. The 3GPP Release 16 standard primarily standardizes the following aspects of NR-U technology: channel sensing process; initial access process; control channel design; Hybrid Automatic Repeat Request (HARQ) and scheduling; and scheduling-free grant transmission.

[0098] 10. Channel monitoring: LBT

[0099] To ensure the harmonious coexistence of various communication systems using unlicensed spectrum for wireless communications, some countries and regions have established regulatory requirements for the use of unlicensed spectrum. For example, according to European regulations, when communicating on unlicensed spectrum, communication devices must adhere to the "LBT" principle. This means that before transmitting signals on a channel in the unlicensed spectrum, they must first perform LBT, or channel sensing. Only if the channel sensing result indicates that the channel is idle, or if LBT is successful, can the communication device transmit signals on that channel. If the channel sensing result indicates that the channel is busy, or if LBT fails, the communication device cannot transmit signals on that channel. Furthermore, to ensure fair use of shared spectrum resources, if a communication device successfully performs LBT on an unlicensed spectrum channel, the duration for which it can use that channel for communication cannot exceed a certain limit. This mechanism, by limiting the maximum duration of communication after a successful LBT, ensures that different communication devices have the opportunity to access the shared channel, thereby enabling harmonious coexistence of different communication systems on the shared spectrum.

[0100] Although channel sensing is not a global regulatory requirement, it can provide interference avoidance and friendly coexistence benefits for communication transmissions between communication systems on shared spectrum. Therefore, in the design of NR systems on unlicensed spectrum, channel sensing is a feature that must be supported by the communication equipment in the system. From the perspective of system networking, channel sensing includes two mechanisms: load-based equipment (LBE) LBT, also known as dynamic channel sensing or dynamic channel occupancy, and frame-based equipment (FBE) LBT, also known as semi-static channel sensing or semi-static channel occupancy.

[0101] 11. Dynamic channel monitoring

[0102] Dynamic channel monitoring can also be considered as an LBT method based on LBE, and its channel monitoring principle is that the communication equipment performs LBT on the carrier of the unlicensed spectrum after the service arrives, and starts sending signals on the carrier after the LBT is successful. The LBT method of dynamic channel monitoring includes Type 1 (Type1) channel access method and Type 2 (Type2) channel access method. The Type 1 channel access method is a multi-slot channel detection with random backoff based on the adjustment of the contention window size, wherein the corresponding channel access priority (Channel Access Priority Class, CAPC) p can be selected according to the priority of the service to be transmitted. The Type 2 channel access method is a channel access method based on a fixed-length monitoring time slot, wherein the Type 2 channel access method includes Type 2A channel access, Type 2B channel access and Type 2C channel access. The Type 1 channel access method is mainly used for communication equipment to initiate channel occupancy, and the Type 2 channel access method is mainly used for communication equipment to share channel occupancy. A special case that needs to be explained is that when the base station initiates channel occupancy for the synchronization signal / physical broadcast channel (SS / PBCH) block within the Discovery Reference Symbol (DRS) window and the DRS window does not include UE unicast data transmission, if the length of the DRS window does not exceed 1ms and the duty cycle of the DRS window transmission does not exceed 1 / 20, then the base station can use Type2A channel access to initiate channel occupancy.

[0103] FIG15 shows an example of a channel occupancy time obtained by a communication device after successful LBT on a channel of an unlicensed spectrum and signal transmission using resources within the channel occupancy time.

[0104] 12. Default channel access mode on the base station side: Type 1 channel access

[0105] Taking the base station as an example, the channel access parameters corresponding to the channel access priority p on the base station side are shown in Table 3. In Table 3, m p It refers to the number of backoff slots corresponding to the channel access priority p, and CWp refers to the contention window (CW) size corresponding to the channel access priority p. min,p Refers to the CW corresponding to the channel access priority p p Minimum value, CW max,p Refers to the CW corresponding to the channel access priority p p The maximum value, T mcot,p It refers to the maximum channel occupancy time corresponding to the channel access priority p.

[0106] If the channel access process is completed, the base station can use the channel to transmit the service to be transmitted. The maximum time length that the base station can use the channel for transmission cannot exceed T mcot,p .

[0107] Table 3 Channel access parameters corresponding to different channel access priorities p

[0108] 13. Channel occupancy time sharing on the base station side

[0109] When the base station initiates the Channel Occupancy Time (COT), in addition to using the resources within the COT for downlink transmission, the resources within the COT can also be shared with the UE for uplink transmission. When the resources within the COT are shared with the UE for uplink transmission, the channel access mode that the UE can use is Type 2A channel access, Type 2B channel access, or Type 2C channel access. Among them, Type 2A channel access, Type 2B channel access, and Type 2C channel access are all channel access modes based on fixed-length monitoring time slots.

[0110] Type 2A channel access:

[0111] The UE uses a 25μs single-slot channel detection method. Specifically, under Type 2A channel access, the UE can monitor the channel for 25μs before starting transmission and transmit after successful channel monitoring.

[0112] Type 2B channel access:

[0113] The UE uses a 16μs single-slot channel detection method. Specifically, in Type 2B channel access, the UE can monitor the channel for 16μs before starting transmission and transmit after successful channel monitoring. The gap between the start position of each transmission and the end position of the previous transmission is 16μs.

[0114] Type 2C channel access:

[0115] The UE transmits after the gap ends without performing channel detection. Specifically, under Type 2C channel access, the UE can directly transmit, where the gap between the start position of the transmission and the end position of the previous transmission is less than or equal to 16μs. The length of the transmission does not exceed 584μs.

[0116] 14. Channel access for transmission(s) on multiple channels

[0117] When the system supports multiple channels (multiple RB sets), the UE needs to access multiple channels separately, that is, LBT channel listening. When the NR-U downlink (DL) multi-channel access mechanism is adopted, the UE can transmit on any channel with successful channel access. In the sidelink unlicensed system, for the transmission of PSFCH and S-SSB, the following multi-channel access methods are supported:

[0118] 1) Type A multi-channel access

[0119] When a UE wants to send a PSFCH or S-SSB on C channels (RB sets), it needs to perform a Type 1 channel access procedure independently on each of the C channels. If access is successful on any one or more of the channels, the UE can send a PSFCH or S-SSB on the one or more corresponding channels.

[0120] 2) Type B multi-channel access

[0121] When a UE wants to transmit a PSFCH or S-SSB on C channels (RB sets), it randomly selects one of the C channels and uses Type 1 channel access. The remaining channels are accessed using Type 2 channels. Only after successful Type 1 channel access can the UE transmit on the channel where Type 2 channel access was successful. If Type 1 channel access fails, all channels accessed using Type 2 channels are considered unavailable.

[0122] 15. Channel access parameter indication (including cyclic prefix extension (CPE))

[0123] In the NR-U system, when the UE is scheduled to transmit the Physical Uplink Shared Channel (PUSCH) or the Physical Uplink Control Channel (PUCCH), the base station can indicate the channel access method corresponding to the PUSCH or PUCCH by carrying the downlink control information (DCI) of the uplink grant (UL grant) or downlink grant (DL grant). Since some channel access methods need to meet the gap requirements of 16μs or 25μs, the UE can ensure the gap size between two transmissions by transmitting an extended cyclic prefix (CPE). Accordingly, the base station can indicate the CPE length of the first symbol of the UE's uplink transmission.

[0124] When specifically indicating, the base station can explicitly indicate channel access parameters such as CPE length, channel access mode or channel access priority to the UE through joint coding. The following describes the characteristics of the indication mode of channel access parameters introduced in different DCI formats.

[0125] 1) Fallback uplink grant for scheduling PUSCH transmission (DCI format 0_0):

[0126] The standard pre-sets a set of joint channel access mode and CPE length indications, as shown in Table 4. The fallback uplink grant includes 2-bit LBT indication information, which is used to indicate the jointly coded channel access mode and CPE length from the set shown in Table 4. The channel access mode and CPE length are used for PUSCH transmission. If the channel access mode is Type 1 channel access, the UE selects the channel access priority (CAPC) based on the service priority.

[0127] 2) Fallback downlink grant for scheduling PDSCH transmission (DCI format 1_0):

[0128] The standard presets a set of joint indications of channel access mode and CPE length, as shown in Table 4. The fallback downlink grant includes 2-bit LBT indication information, which is used to indicate the jointly coded channel access mode and CPE length from the set shown in Table 4. The channel access mode and CPE length are used for PUCCH transmission, where the PUCCH can carry a positive acknowledgment (ACK) or negative acknowledgment (NACK) corresponding to the PDSCH. If the channel access mode is Type 1 channel access, the UE determines the channel access priority CAPC = 1 for transmitting the PUCCH.

[0129] Table 4 Channel access mode and CPE length joint indication set

[0130] In Table 4, the value of C1 is specified by the protocol. When the subcarrier spacing is 15 kHz and 30 kHz, C1 = 1; when the subcarrier spacing is 60 kHz, C1 = 2. The values ​​of C2 and C3 are configured by higher-layer parameters. When the subcarrier spacing is 15 kHz and 30 kHz, the values ​​of C2 and C3 range from 1 to 28; when the subcarrier spacing is 60 kHz, the values ​​of C2 and C3 range from 2 to 28.

[0131] 3) Non-fallback uplink grant for scheduling PUSCH transmission (DCI format 0_1):

[0132] The higher layer configures an LBT parameter indication set, which includes at least one jointly coded channel access method, CPE length, and CAPC. The non-fallback uplink grant includes LBT indication information, which is used to indicate the jointly coded channel access method, CPE length, and CAPC from the above-mentioned LBT parameter indication set. The channel access method, CPE length, and CAPC are used for PUSCH transmission. If the indicated channel access method is Type 2 channel access, the CAPC indicated at the same time is the CAPC used by the base station when obtaining the COT. The LBT indication information includes a maximum of 6 bits.

[0133] 4) Non-fallback downlink grant for scheduling PDSCH transmission (DCI format 1_1):

[0134] The higher layer configures an LBT parameter indication set, which includes at least one jointly coded channel access mode and CPE length. The non-fallback downlink grant includes LBT indication information, which is used to indicate the jointly coded channel access mode and CPE length from the above-mentioned LBT parameter indication set. The channel access mode and CPE length are used for PUCCH transmission, wherein the PUCCH can carry ACK or NACK information corresponding to the PDSCH. If the channel access mode is Type 1 channel access, the UE determines that the channel access priority CAPC=1 for transmitting the PUCCH. The LBT indication information includes a maximum of 4 bits.

[0135] In addition to the above explicit indications, the base station can also implicitly indicate the channel access method within the COT. When the UE receives an UL grant or DL ​​grant sent by the base station indicating that the channel access type corresponding to the PUSCH or PUCCH is Type 1 channel access, if the UE can determine that the PUSCH or PUCCH belongs to the COT of the base station, for example, the UE receives a DCI format 2_0 sent by the base station and determines that the PUSCH or PUCCH belongs to the COT of the base station based on the DCI format 2_0, then the UE can update the channel access type corresponding to the PUSCH or PUCCH to Type 2A channel access instead of Type 1 channel access.

[0136] The above briefly explains the relevant technologies / terms involved in the embodiments of this application, which will not be repeated in the following embodiments.

[0137] It should be understood that the terms "system" and "network" are often used interchangeably in this document. The term "and / or" in this document is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this document generally indicates that the objects associated before and after are in an "or" relationship. It should also be understood that the "indication" mentioned in the embodiments of this application can be a direct indication, an indirect indication, or an indication of an association relationship. For example, A indicates B, which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B. It should also be understood that the "correspondence" mentioned in the embodiments of this application can mean that there is a direct or indirect correspondence between the two, or it can mean that there is an association relationship between the two, or it can mean a relationship between indication and indication, configuration and configuration, etc. It should also be understood that the “predefined” or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method. For example, predefined can refer to what is defined in the protocol. It should also be understood that in the embodiments of the present application, the “protocol” may refer to a standard protocol in the field of communications, such as LTE protocols, NR protocols, and related protocols used in future communication systems, and the present application does not limit this.

[0138] It should also be understood that the embodiments of the present application do not limit the specific form of the terminal. As an example, the terminal in the embodiments of the present application may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent or a user device. The access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolution network, etc.

[0139] In current SL technology, the carrier aggregation mechanism supports feedback, and each CC is configured with PSFCH resources. Within a timeslot, PSFCH resources must occupy at least two symbols, which cannot be used for data transmission. Therefore, in carrier aggregation scenarios, there are a large number of symbols that cannot be used for data transmission, resulting in low resource utilization.

[0140] In view of this, the present application provides an information transmission method, apparatus, device, chip and storage medium. In this method, the first terminal may send multiple PSSCHs and PSCCHs associated with the multiple PSSCHs on multiple CCs, wherein the PSFCH resources corresponding to the multiple PSSCHs may be located on some CCs in the multiple CCs. That is, the first terminal may use multiple CCs for the transmission of PSSCHs and PSCCHs, and the PSFCH resources corresponding to the transmitted PSSCHs may be concentrated on some CCs in the multiple CCs. In this way, for other CCs in the multiple CCs except for the part of CCs, it is not necessary to configure corresponding PSFCH resources, so some symbols can be saved for the transmission of PSSCHs and PSCCHs (or for the transmission of data), thereby improving the overall resource utilization and data transmission efficiency on the multiple CCs.

[0141] To facilitate understanding of the technical solutions of the embodiments of the present application, the technical solutions of the present application are described in detail below through specific embodiments. The above related technologies can be combined arbitrarily with the technical solutions of the embodiments of the present application as optional solutions, and all of them fall within the scope of protection of the embodiments of the present application. The embodiments of the present application include at least part of the following contents.

[0142] FIG16 is a flow chart of the information transmission method provided in an embodiment of the present application. As shown in FIG16 , the method may include the following steps:

[0143] S1601, a first terminal sends multiple PSSCHs and PSCCHs associated with the multiple PSSCHs to a second terminal on multiple CCs; wherein PSFCH resources corresponding to the multiple PSSCHs are located on some CCs among the multiple CCs.

[0144] In this embodiment, the first terminal may transmit multiple PSSCHs and PSCCHs associated with the multiple PSSCHs to the second terminal on multiple CCs. For example, the first terminal may transmit at least one PSSCH and a PSCCH associated with the at least one PSSCH on each of the multiple CCs. Accordingly, the second terminal may receive multiple PSSCHs and PSCCHs associated with the multiple PSSCHs from the first terminal on the multiple CCs.

[0145] It should be noted that, for a certain PSSCH, the PSCCH associated with the PSSCH can also be understood as the PSCCH transmitted in the same time slot as the PSSCH. In other words, the PSSCH and PSCCH associated with each other can be transmitted in the same time slot.

[0146] In this embodiment, the PSFCH resources corresponding to the multiple PSSCHs transmitted by the first terminal on multiple CCs may be located on some of the CCs. In other words, the PSFCH resources corresponding to the multiple PSSCHs may be concentrated on some of the CCs. For example, these CCs may be CCs configured in a resource pool that can be used for PSFCH transmission. In some embodiments, CCs other than these CCs are not configured with PSFCH resources, or in other words, CCs other than these CCs cannot be used for PSFCH transmission.

[0147] For example, assuming that the PSSCH transmitted by the first terminal on CC#1, CC#2, and CC#3 includes N PSSCHs, the PSFCH resources corresponding to these N PSSCHs can be concentrated on some CCs among CC#1, CC#2, and CC#3. For example, the PSFCH resources corresponding to these N PSSCHs can be concentrated on CC#2. In this way, PSFCH resources do not need to be allocated on CC#1 and CC#3, thus saving some symbols for PSSCH and PSCCH transmission (or for data transmission), thereby improving resource utilization and data transmission efficiency.

[0148] Exemplarily, each PSSCH may correspond to at least one PSFCH resource.

[0149] It should be noted that the PSFCH resource corresponding to the PSSCH can also be understood as the PSFCH resource reserved for the PSSCH. The second terminal can send a PSFCH to the first terminal on the PSFCH resource to indicate whether the PSSCH is correctly received.

[0150] According to the method of this embodiment, the first terminal may send multiple PSSCHs and PSCCHs associated with the multiple PSSCHs to the second terminal on multiple CCs, wherein the PSFCH resources corresponding to the multiple PSSCHs may be located on some CCs among the multiple CCs. In other words, the first terminal may use multiple CCs for the transmission of PSSCHs and PSCCHs, and the PSFCH resources corresponding to the transmitted PSSCHs may be concentrated on some CCs among the multiple CCs. In this way, for CCs other than the some CCs among the multiple CCs, it is not necessary to configure corresponding PSFCH resources, so some symbols can be saved for the transmission of PSSCHs and PSCCHs (or for the transmission of data), thereby improving the overall resource utilization and data transmission efficiency on the multiple CCs.

[0151] In some embodiments, the multiple PSSCHs sent by the first terminal may include a first PSSCH. The PSFCH resource corresponding to the first PSSCH may be related to the CC and time slot where the first PSSCH is located; or the PSFCH resource corresponding to the first PSSCH may be related to the starting position of the frequency domain resource where the first PSCCH is located and the time slot where the first PSSCH is located, and the first PSCCH is associated with the first PSSCH.

[0152] In one example, the PSFCH resource corresponding to the first PSSCH is related to the CC and time slot where the first PSSCH is located.

[0153] That is, based on the CC and timeslot where the first PSSCH is located, the PSFCH resource corresponding to the first PSSCH can be determined. In other words, the CC where the first PSSCH is located and the timeslot where the first PSSCH is located can jointly correspond to one PSFCH resource.

[0154] In another example, the PSFCH resource corresponding to the first PSSCH is related to the starting position of the frequency domain resource where the first PSCCH (associated with the first PSSCH) is located and the time slot where the first PSSCH is located.

[0155] That is, based on the starting position of the frequency domain resource where the first PSCCH is located and the time slot where the first PSSCH is located, the PSFCH resource corresponding to the first PSSCH can be determined. In other words, the starting position of the frequency domain resource where the first PSCCH is located and the time slot where the first PSSCH is located can jointly correspond to one PSFCH resource.

[0156] It should be noted that, since the first PSCCH is associated with the first PSSCH, the time slot where the first PSCCH and the first PSSCH are located is the same time slot. Therefore, the time slot where the first PSSCH is located can also be replaced by the time slot where the first PSCCH is located.

[0157] It should also be noted that the CC where a PSSCH / PSCCH is located mentioned in the embodiments of the present application can also be understood as the CC used to transmit the PSSCH / PSCCH; the time slot where a PSSCH / PSCCH is located can also be understood as the time slot where the PSSCH / PSCCH is transmitted. For example, the CC where the first PSSCH is located can also be understood as the CC used to transmit the first PSSCH; the time slot where the first PSSCH is located can also be understood as the time slot where the first PSSCH is transmitted.

[0158] According to the method of this embodiment, the PSFCH resource corresponding to the first PSSCH is related to the CC and time slot where the first PSSCH is located, or is related to the starting position of the frequency domain resource where the first PSCCH is located and the time slot where the first PSSCH is located. In this way, the first terminal does not need to indicate the PSFCH resources corresponding to each PSSCH to the second terminal. After receiving the first PSSCH from the first terminal, the second terminal can determine the PSFCH resource corresponding to the first PSSCH based on the CC and time slot where the first PSSCH is located, or can determine the PSFCH resource corresponding to the first PSSCH based on the starting position of the frequency domain resource where the first PSCCH is located and the time slot where the first PSSCH is located. Then, the PSFCH can be sent to the first terminal on the determined PSFCH resource to indicate whether the first PSSCH is correctly received. Since this method does not need to indicate the PSFCH resources corresponding to each PSSCH, it is beneficial to save the load of indication information.

[0159] In some embodiments, determining the PSFCH resource may include determining the location (time-frequency location) of the PSFCH resource. For example, determining the PSFCH resource corresponding to the first PSSCH may include determining the location (time-frequency location) of the PSFCH resource corresponding to the first PSSCH.

[0160] In some embodiments, the multiple PSSCHs sent by the first terminal also include a second PSSCH. The PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH may be located in the first time slot of the same CC, and the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are orthogonal in the frequency domain.

[0161] That is, among the multiple PSSCHs, PSFCH resources corresponding to different PSSCHs may be located in the same time slot on the same CC, and different PSFCH resources located in the same time slot on the same CC may be orthogonal in the frequency domain.

[0162] According to the method of this embodiment, the PSFCH resources corresponding to different PSSCHs can be concentrated in the same time slot on the same CC in a frequency domain orthogonal manner. In this way, the second terminal can send PSFCHs for different PSSCHs to the first terminal in the same time slot on the same CC, thereby further improving resource utilization.

[0163] In some embodiments, the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH may occupy the same symbols (eg, occupy the same two symbols) in the first time slot.

[0164] In some embodiments, when the first PSSCH and the second PSSCH are located in different CCs, and the index of the CC where the first PSSCH is located is smaller than the index of the CC where the second PSSCH is located, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is smaller than the index of the PSFCH resource corresponding to the second PSSCH in the first time slot.

[0165] That is to say, for PSSCHs on different CCs, if the PSFCH resources corresponding to the PSSCHs on different CCs are located in the same time slot of the same CC, then the smaller the CC index of the PSSCH is, the smaller the index of the corresponding PSFCH resource in the time slot is.

[0166] For example, assume that the first PSSCH is located in CC#1 and the second PSSCH is located in CC#2, where the index of CC#1 is 1 and the index of CC#2 is 2. Since the index of CC#1 is smaller than the index of CC#2, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is smaller than the index of the PSFCH resource corresponding to the second PSSCH in the first time slot. For example, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is 1, and the index of the PSFCH resource corresponding to the second PSSCH in the first time slot is 4. That is, the first PSSCH may correspond to the PSFCH resource with index 1 in the first time slot, and the second PSSCH may correspond to the PSFCH resource with index 4 in the first time slot.

[0167] In some embodiments, for different PSFCH resources within the same timeslot on the same CC, the lower the frequency domain position (or frequency point), the smaller the PSFCH resource index. For example, the same timeslot on the same CC contains three PSFCH resources, denoted as PSFCH#1 (index 1), PSFCH#2 (index 2), and PSFCH#3 (index 3), where the frequency domain position of PSFCH#1 is lower than that of PSFCH#2, and the frequency domain position of PSFCH#2 is lower than that of PSFCH#3.

[0168] In some embodiments, for different PSFCH resources within the same timeslot on the same CC, the higher the frequency domain position (or frequency point), the smaller the PSFCH resource index. For example, the same timeslot on the same CC contains three PSFCH resources, denoted as PSFCH#1 (index 1), PSFCH#2 (index 2), and PSFCH#3 (index 3). The frequency domain position of PSFCH#1 is higher than that of PSFCH#2, and the frequency domain position of PSFCH#2 is higher than that of PSFCH#3.

[0169] In some embodiments, when the first PSSCH and the second PSSCH are located in the same CC, and the time slot where the first PSSCH is located is before the time slot where the second PSSCH is located, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is smaller than the index of the PSFCH resource corresponding to the second PSSCH in the first time slot.

[0170] That is to say, for PSSCHs in different time slots on the same CC, if the PSFCH resources corresponding to the PSSCHs in different time slots on the same CC are located in the same time slot of the same CC, then the earlier the time slot where the PSSCH is located, the smaller the index of the corresponding PSFCH resource in the time slot.

[0171] For example, assume that the first PSSCH and the second PSSCH are both located in CC#1, where the time slot where the first PSSCH is located is time slot t, and the time slot where the second PSSCH is located is time slot t+2. Since time slot t is before time slot t+2, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is smaller than the index of the PSFCH resource corresponding to the second PSSCH in the first time slot. For example, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is 1, and the index of the PSFCH resource corresponding to the second PSSCH in the first time slot is 3. That is, the first PSSCH can correspond to the PSFCH resource with index 1 in the first time slot, and the second PSSCH can correspond to the PSFCH resource with index 3 in the first time slot.

[0172] In some embodiments, the PSFCH resource corresponding to the first PSSCH may be indicated by a first SCI, and the first SCI may be carried in a PSCCH associated with the first PSSCH.

[0173] That is to say, when the first terminal sends the first PSSCH and its associated PSCCH to the second terminal, it can indicate the PSFCH resource corresponding to the first PSSCH to the second terminal through the first SCI carried in the PSCCH. Correspondingly, after receiving the first PSSCH and its associated PSCCH from the first terminal, the second terminal can determine the PSFCH resource corresponding to the first PSSCH based on the first SCI carried in the PSCCH, and then send the PSFCH to the first terminal on the determined PSFCH resource to indicate whether the first PSSCH is correctly received.

[0174] As an example, the first SCI may include an information field D1, which may be composed of, for example, d bits. The information field D1 may be used to indicate the PSFCH resource corresponding to the first PSSCH. Thus, the second terminal may determine the PSFCH resource corresponding to the first PSSCH based on the information field D1 included in the first SCI.

[0175] In some embodiments, the PSFCH resource corresponding to the first PSSCH is located in the first time slot; when the above-mentioned part of CCs (the part of CCs where the PSFCH resources corresponding to multiple PSSCHs are located) includes one CC, the first SCI is used to indicate the index of the PSFCH resource corresponding to the first PSSCH in the first time slot; when the above-mentioned part of CCs includes multiple CCs, the first SCI is used to indicate the index of the CC where the PSFCH resource corresponding to the first PSSCH is located, and the index of the PSFCH resource corresponding to the first PSSCH in the first time slot.

[0176] In one possible scenario, the aforementioned partial CCs include one CC. That is, the PSFCH resources corresponding to multiple PSSCHs transmitted by the first terminal on multiple CCs are concentrated on a single CC. In this case, the first SCI may be used to indicate the index of the PSFCH resource corresponding to the first PSSCH within the first time slot. This index may be indicated, for example, by the information field D1 included in the first SCI.

[0177] It is understandable that, since there may be multiple PSFCH resources in a time slot, the first terminal may indicate to the second terminal the index of the PSFCH resource corresponding to the first PSSCH in the first time slot, so that the second terminal can determine which PSFCH resource in the first time slot the PSFCH resource corresponding to the first PSSCH is. In addition, since the PSFCH resources are all concentrated on a specific CC, the first terminal may not need to indicate to the second terminal the CC in which the PSFCH resource corresponding to the first PSSCH is located.

[0178] In another possible scenario, the aforementioned partial CCs include multiple CCs, that is, the PSFCH resources corresponding to the multiple PSSCHs sent by the first terminal on multiple CCs are concentrated on multiple CCs, or in other words, there are multiple CCs configured with PSFCH resources. In this case, the first SCI can be used to indicate the index of the CC where the PSFCH resource corresponding to the first PSSCH is located, and the index of the PSFCH resource corresponding to the first PSSCH in the first time slot. The index of the CC where the PSFCH resource corresponding to the first PSSCH is located and the index of the PSFCH resource in the first time slot can be indicated, for example, by the information field D1 contained in the first SCI.

[0179] In some scenarios, when multiple CCs are configured with PSFCH resources, the indexes in the same time slot on different CCs may overlap. For example, assuming that PSFCH resources are configured in the first time slots of CC#1 and CC#2, the following situation may occur: the first time slot on CC#1 contains k PSFCH resources, and the indexes of the k PSFCH resources are 1 to k respectively; the first time slot on CC#2 also contains k PSFCH resources, and the indexes of the k PSFCH resources are also 1 to k. Therefore, in addition to indicating the index of the PSFCH resource corresponding to the first PSSCH in the first time slot to the second terminal, the first terminal can also indicate to the second terminal the index of the CC where the PSFCH resource corresponding to the first PSSCH is located. In this way, the second terminal can determine the CC where the PSFCH resource corresponding to the first PSSCH is located based on the index of the CC, and further determine which PSFCH resource in the first time slot on the CC corresponding to the first PSSCH is based on the index of the PSFCH resource corresponding to the first PSSCH in the first time slot.

[0180] In some embodiments, when multiple CCs are configured with PSFCH resources, the first terminal may, for example, indicate a CC with better channel conditions / quality to the second terminal in the first SCI based on the channel conditions / quality of the multiple CCs. In this way, the second terminal can send a PSFCH to the first terminal on the CC with better channel conditions / quality to indicate whether the first PSFCH was correctly received. Because PSFCH transmission can affect system reliability, using a CC with better channel conditions / quality for PSFCH transmission helps ensure system reliability.

[0181] In some embodiments, the first time slot (the time slot where the PSFCH resources corresponding to the first PSSCH are located) is: a time slot containing PSFCH resources after the second time slot and closest to the second time slot; or, a time slot containing PSFCH resources after the third time slot and closest to the third time slot; the second time slot is the time slot where the first PSSCH is located, and the third time slot is located after the second time slot.

[0182] In a possible manner, the first time slot is a time slot that is after the second time slot and is closest to the second time slot and contains PSFCH resources.

[0183] For example, assuming that the second time slot (the time slot where the first PSSCH is located) is time slot n, then if time slot n+1 contains PSFCH resources, the time slot where the PSFCH resources corresponding to the first PSSCH are located is time slot n+1; if time slot n+1 does not contain PSFCH resources, and time slot n+2 contains PSFCH resources, the time slot where the PSFCH resources corresponding to the first PSSCH are located is time slot n+2, and so on.

[0184] In this way, after receiving the first PSSCH, the second terminal can send the PSFCH to the first terminal in the latest time slot where the PSFCH resource exists to indicate whether the first PSSCH is correctly received, thereby helping to improve feedback efficiency.

[0185] In another possible way, considering that it takes a certain amount of processing time for the second terminal to process the received PSSCH and its associated PSCCH, and the second terminal may not have completed the processing of the first PSSCH and its associated PSCCH in time slot n+1, the first time slot can be a time slot containing PSFCH resources after the third time slot and closest to the third time slot.

[0186] For example, assuming that the third time slot (located after the second time slot) is time slot m, then if time slot m+1 contains PSFCH resources, the time slot where the PSFCH resources corresponding to the first PSSCH are located is time slot m+1; if time slot m+1 does not contain PSFCH resources, and time slot m+2 contains PSFCH resources, the time slot where the PSFCH resources corresponding to the first PSSCH are located is time slot m+2, and so on.

[0187] In some embodiments, the value of m is related to the time required for the second terminal to process the received PSSCH and its associated PSCCH. For example, the longer the second terminal takes to process the received PSSCH and its associated PSCCH, the larger the value of m. This ensures that the second terminal has sufficient time to complete processing the first PSSCH and its associated PSCCH before the first time slot, and then sends a PSFCH to the first terminal in the first time slot based on the processing results to indicate whether the first PSSCH was correctly received.

[0188] In some embodiments, the third time slot is the next time slot of the second time slot.

[0189] For example, assuming the second time slot (the time slot where the first PSSCH is located) is time slot n, then the third time slot is time slot n+1. In this case, the first time slot can be the time slot containing PSFCH resources that is closest to time slot n+1 and follows time slot n+1. For example, if time slot n+2 contains PSFCH resources, then the time slot where the PSFCH resources corresponding to the first PSSCH are located is time slot n+2; if time slot n+2 does not contain PSFCH resources, and time slot n+3 does contain PSFCH resources, then the time slot where the PSFCH resources corresponding to the first PSSCH are located is time slot n+3, and so on.

[0190] According to the method of this embodiment, the second terminal can determine the position of the first time slot according to the above solution. Therefore, the first terminal does not need to indicate the position of the first time slot to the second terminal, which helps to save the load of indication information.

[0191] In some embodiments, the first PSSCH is located in a first CC, and the retransmission resources of the first PSSCH are located in a second CC, which is the same as or different from the first CC.

[0192] The retransmission resource of the first PSSCH may be used by the first terminal to retransmit the first PSSCH to the second terminal. For example, if the PSFCH received by the first terminal on the PSFCH resource corresponding to the first PSSCH carries a negative acknowledgment (NACK), or the first terminal does not receive a positive acknowledgment (ACK) on the PSFCH resource corresponding to the first PSSCH, the first terminal may retransmit the first PSSCH to the second terminal on the retransmission resource.

[0193] According to the method of this embodiment, the CC where the retransmission resources of the first PSSCH are located (the second CC) and the CC where the first PSSCH is located (the first CC) may be the same or different, which is conducive to improving the flexibility of resource utilization.

[0194] In some embodiments, when the first SCI includes the first indication information, the first indication information is used to indicate the second CC; when the first SCI does not include the first indication information, the second CC is the same as the first CC, or the second CC is the same as the third CC, and the third CC is the CC where the PSFCH resources corresponding to the first PSSCH are located. The first SCI is carried in the PSCCH associated with the first PSSCH.

[0195] In one possible scenario, the first SCI includes first indication information. In this case, the first indication information can be used to indicate the second CC. Indicating the second CC can also be understood as indicating the CC where the retransmission resources of the first PSSCH are located, or can also be understood as indicating which CC is used to retransmit the first PSSCH.

[0196] For example, if the second CC indicated by the first indication information is CC#2, it means that the retransmission resource of the first PSSCH is located in CC#2. In this case, if the first terminal receives NACK on the PSFCH resource corresponding to the first PSSCH, or does not receive ACK, the first terminal can retransmit the first PSSCH to the second terminal on CC#2; for another example, if the second CC indicated by the first indication information is CC#3, it means that the retransmission resource of the first PSSCH is located in CC#3. In this case, if the first terminal receives NACK on the PSFCH resource corresponding to the first PSSCH, or does not receive ACK, the first terminal can retransmit the first PSSCH to the second terminal on CC#3.

[0197] In another possible case, the first SCI does not include the first indication information. In this case, the second CC is the same as the first CC, or the second CC is the same as the third CC.

[0198] That is, if the first SCI does not include the first indication information, the retransmission resource corresponding to the first PSSCH may be the same as the CC where the first PSSCH is located, or may be the same as the CC where the PSFCH resource corresponding to the first PSSCH is located. In some scenarios, if the first SCI does not carry the first indication information, it can be considered that the first SCI implicitly indicates that the second CC is the same as the first CC, or the same as the third CC.

[0199] In some embodiments, the third CC is the same as or different from the first CC. That is, the CC where the PSFCH resources corresponding to the first PSSCH are located can be the same as or different from the CC where the first PSSCH is located. This allows the transmission of the first PSSCH and the transmission of the PSFCH corresponding to the first PSSCH to be performed on the same CC, thereby improving resource utilization flexibility.

[0200] In some embodiments, the second CC is preconfigured, configured by a network device, or determined by the first terminal. In other words, the CC where the retransmission resources for the first PSSCH are located is preconfigured, configured by a network device, or determined by the first terminal. In other words, which CC is used to retransmit the first PSSCH is preconfigured, configured by a network device, or determined by the first terminal.

[0201] In one example, the second CC is preconfigured or configured by a network device. In this case, the first SCI may carry first indication information to indicate the second CC that is preconfigured or configured by the network device, or the first SCI may not carry the first indication information to save the load of the indication information. In the case that the first SCI does not carry the first indication information, the first terminal may retransmit the first PSSCH on the second CC that is preconfigured or configured by the network device. In some scenarios, if the first SCI does not carry the first indication information, it can also be considered that the first SCI implicitly indicates that the CC where the retransmission resource is located is a second CC that is preconfigured or configured by the network device. Exemplarily, the second CC that is preconfigured or configured by the network device may be the same as the first CC, or may be the same as the third CC.

[0202] In another example, the second CC is determined by the first terminal. In this case, the first SCI may carry first indication information to indicate the second CC determined by the first terminal, or the first SCI may not carry the first indication information to save the load of indication information.

[0203] For example, assuming that the second CC determined by the first terminal is the same as the first CC or the third CC, the first indication information may not need to be carried in the first SCI. If the first SCI does not carry the first indication information, the second CC may be considered to be the same as the first CC, or the third CC. In other words, if the first SCI does not carry the first indication information, the first SCI may be considered to implicitly indicate that the second CC is the same as the first CC, or the third CC.

[0204] In some embodiments, the first terminal may determine, based on the channel conditions / channel qualities of multiple CCs, a CC with better channel conditions / channel quality as the second CC. In this way, the first terminal may retransmit the first PSSCH on the CC with better channel conditions / channel quality, thereby improving the success rate of retransmissions.

[0205] In some embodiments, if the first CC is currently relatively busy and its resources are relatively congested, the first terminal may determine the second CC as a CC other than the first CC with relatively low resource congestion. In this way, the retransmission of the first PSSCH may not need to be performed on the first CC, which is beneficial to improving the problem of high resource congestion on the first CC and improving the retransmission performance.

[0206] In some embodiments, the first PSSCH is an initial transmission or a retransmission PSSCH. That is, the first PSSCH (the first PSSCH transmitted on the first CC) may be an initial transmission of the first PSSCH or a retransmission of the first PSSCH.

[0207] For example, when the first PSSCH is an initially transmitted PSSCH, the retransmission resources of the first PSSCH may include at least the first retransmission resources, that is, the resources for the first retransmission of the first PSSCH may be located on the second CC. When the first PSSCH is a retransmitted PSSCH, the retransmission resources of the first PSSCH may include at least the next retransmission resources, that is, the resources for the next retransmission of the first PSSCH may be located on the second CC.

[0208] In some embodiments, the first PSSCH may be any one of a plurality of PSSCHs transmitted by the first terminal. That is, any one of the plurality of PSSCHs may be applicable to the solution applicable to the first PSSCH.

[0209] In current SL technology, in carrier aggregation scenarios, the initial transmission and retransmission of a PSSCH are limited to the same carrier / CC, and resources on different carriers / CCs cannot be flexibly utilized for retransmission. As a result, some carriers / CCs with busier services are in a busy or poor channel condition for a long time.

[0210] In view of this, the present application also provides an information transmission method. In this method, a first terminal may send a PSSCH and an associated PSCCH on a first CC. The retransmission resource of the PSSCH may be located in a second CC, and the second CC may be indicated by the PSCCH. According to the method of an embodiment of the present application, the CC where the retransmission resource is located can be flexibly indicated by the PSCCH, so that the retransmission of the PSSCH is performed on the indicated CC, thereby improving the flexibility of resource utilization, which is conducive to improving the problem that some CCs are in a busy state for a long time and the channel conditions are poor for a long time.

[0211] FIG17 is a second flow chart of the information transmission method provided in an embodiment of the present application. As shown in FIG17 , the method may include the following steps:

[0212] S1701: A first terminal sends a PSSCH and a PSCCH associated with the PSSCH on a first CC. A retransmission resource of the PSSCH is located in a second CC, and the second CC is indicated by the PSCCH.

[0213] In this embodiment, the first terminal may send a PSSCH and a PSCCH associated with the PSSCH on a first CC, wherein the PSCCH may be used to indicate a second CC where retransmission resources of the PSSCH are located.

[0214] The retransmission resource of the PSSCH may be used by the first terminal to retransmit the PSSCH. For example, if the first terminal receives a NACK or does not receive an ACK on the PSFCH resource corresponding to the PSSCH, the first terminal may retransmit the PSSCH on the retransmission resource.

[0215] In some embodiments, the PSCCH may be received by, for example, a second terminal. By receiving the PSCCH from the first terminal, the second terminal may learn the CC where the retransmission resources of the PSSCH associated with the PSCCH are located. In this way, the second terminal may avoid occupying the retransmission resources of the PSSCH during resource sensing, thereby preventing resource conflicts.

[0216] According to the method of this embodiment, the PSCCH sent by the first terminal and the PSSCH associated with the PSCCH can be transmitted through the first CC, and the retransmission resources of the PSSCH can be located in the second CC, which can be indicated by the PSCCH. This method indicates the CC where the retransmission resources are located through the PSCCH, so that the PSSCH retransmission is performed on the indicated CC, which is conducive to improving the flexibility of resource utilization and further improving the problem of some CCs being in a busy state for a long time and the channel conditions being poor for a long time.

[0217] In some embodiments, the PSCCH includes the SCI, or in other words, the PSCCH carries the SCI. When the SCI includes (carries) first indication information, the first indication information is used to indicate a second CC, which is the same as or different from the first CC. When the SCI does not include the first indication information, the second CC is the same as the first CC, or the second CC is the same as the third CC, and the third CC is the CC where the PSFCH resources corresponding to the PSSCH are located.

[0218] In one possible scenario, the SCI includes the first indication information. In this case, the first indication information can be used to indicate the second CC. That is, the way in which the PSCCH indicates the second CC can be: indicating the second CC through the first indication information in the SCI.

[0219] Indicating the second CC may also be understood as indicating the CC where the retransmission resources of the PSSCH are located, or may also be understood as indicating which CC is the CC for retransmitting the PSSCH.

[0220] For example, if the second CC indicated by the first indication information is CC#2, it means that the retransmission resource of PSSCH is located in CC#2. In this case, if the first terminal receives NACK on the PSFCH resource corresponding to the PSSCH, or does not receive ACK, the first terminal can retransmit the PSSCH to the second terminal on CC#2; for another example, if the second CC indicated by the first indication information is CC#3, it means that the retransmission resource of PSSCH is located in CC#3. In this case, if the first terminal receives NACK on the PSFCH resource corresponding to the PSSCH, or does not receive ACK, the first terminal can retransmit the PSSCH to the second terminal on CC#3.

[0221] In another possible scenario, the SCI does not include the first indication information. In this case, the second CC is the same as the first CC, or the second CC is the same as the third CC. In this case, the PSCCH (or SCI) can also be considered to implicitly indicate that the second CC is the same as the first CC, or the third CC.

[0222] That is, if the SCI does not include the first indication information, the retransmission resource corresponding to the PSSCH may be the same as the CC where the PSSCH is located, or may be the same as the CC where the PSFCH resource corresponding to the PSSCH is located.

[0223] In some embodiments, the third CC is the same as or different from the first CC. That is, the CC where the PSFCH resources corresponding to the PSSCH are located can be the same as or different from the CC where the PSSCH is located. This allows the transmission of the PSSCH and the corresponding PSFCH to be performed on the same CC, thereby improving resource utilization flexibility.

[0224] In some embodiments, the second CC is preconfigured, configured by a network device, or determined by the first terminal. In other words, the CC where the PSSCH retransmission resources are located is preconfigured, configured by a network device, or determined by the first terminal. In other words, which CC is used to retransmit the PSSCH is preconfigured, configured by a network device, or determined by the first terminal.

[0225] In one example, the second CC is preconfigured or configured by a network device. In this case, the SCI may carry first indication information to indicate the second CC that is preconfigured or configured by the network device, or the SCI may not carry the first indication information to save the load of the indication information. In the case that the SCI does not carry the first indication information, the first terminal may retransmit the PSSCH on the second CC that is preconfigured or configured by the network device. In some scenarios, if the SCI does not carry the first indication information, it can also be considered that the SCI implicitly indicates that the CC where the retransmission resources are located is a second CC that is preconfigured or configured by the network device. Exemplarily, the second CC that is preconfigured or configured by the network device may be the same as the first CC, or may be the same as the third CC.

[0226] In another example, the second CC is determined by the first terminal. In this case, the SCI may carry first indication information to indicate the second CC determined by the first terminal, or the SCI may not carry the first indication information to save the load of indication information.

[0227] For example, assuming that the second CC determined by the first terminal is the same as the first CC or the third CC, the first indication information may not need to be carried in the SCI. If the SCI does not carry the first indication information, the second CC may be considered to be the same as the first CC, or the third CC. In other words, if the SCI does not carry the first indication information, the SCI may be considered to implicitly indicate that the second CC is the same as the first CC, or the third CC.

[0228] In some embodiments, the first terminal may determine, based on the channel conditions / channel qualities of multiple CCs, a CC with better channel conditions / channel quality as the second CC. In this way, the first terminal may retransmit the PSSCH on the CC with better channel conditions / channel quality, thereby improving the retransmission success rate.

[0229] In some embodiments, if the first CC is currently relatively busy and its resources are relatively congested, the first terminal may determine the second CC as a CC other than the first CC with relatively low resource congestion. In this way, the retransmission of the first PSSCH may not need to be performed on the first CC, which is beneficial to improving the problem of high resource congestion on the first CC and improving the retransmission performance.

[0230] In some embodiments, the PSSCH is an initial transmission or a retransmission of the PSSCH. That is, the PSSCH sent by the first terminal on the first CC may be an initial transmission of the PSSCH or a retransmission of the PSSCH.

[0231] Exemplarily, if the PSSCH sent by the first terminal on the first CC is an initially transmitted PSSCH, the retransmission resources of the PSSCH may include at least the first retransmission resources, that is, the resources for the first retransmission of the PSSCH may be located on the second CC. If the PSSCH sent by the first terminal on the first CC is a retransmitted PSSCH, the retransmission resources of the PSSCH may include at least the next retransmission resources, that is, the resources for the next retransmission of the PSSCH may be located on the second CC.

[0232] The above introduces the information transmission method provided by the embodiment of the present application. To facilitate understanding of the embodiment of the present application, the following introduces possible implementation schemes of the information transmission method applicable to the embodiment of the present application with examples.

[0233] Option 1

[0234] In solution 1, for K CCs, all PSFCH resources can be concentrated on K1 (1≤K1≤K) CCs.

[0235] Exemplarily, a sidelink resource pool may be configured as follows: the resource pool includes K CCs, each of which may transmit PSCCH and PSSCH, and K1 CCs are configured with PSFCH resources, while no PSFCH resources are configured on CCs other than the K1 CCs.

[0236] In some embodiments, for each PSSCH on each CC, there may be at least one PSFCH resource corresponding to the PSSCH. For example, the corresponding manner may include the following manner A and / or manner B:

[0237] Method A: PSSCH and PSFCH resources correspond to each other in an implicit manner.

[0238] As an example, the CC where the PSSCH is located and the timeslot where the PSSCH is located can jointly correspond to a PSFCH resource. In other words, the PSFCH resource corresponding to the PSSCH can be determined based on the CC and timeslot where the PSSCH is located. In other words, the PSFCH resource corresponding to the PSSCH is related to the CC and timeslot where the PSSCH is located.

[0239] As another example, the starting position of the frequency-domain resources occupied by the PSCCH associated with the PSSCH, and the time slot in which the PSSCH is located (i.e., the time slot in which the PSCCH is located), can jointly correspond to a PSFCH resource. That is to say, based on the starting position of the frequency-domain resources occupied by the PSCCH associated with the PSSCH, and the time slot in which the PSSCH is located, the PSFCH resource corresponding to the PSSCH can be determined. Or rather, the PSFCH resource corresponding to the PSSCH is related to the starting position of the frequency-domain resources where the PSCCH associated with the PSSCH is located, and the time slot in which the PSSCH is located.

[0240] Mode B: The correspondence between the PSSCH and the PSFCH resource is indicated by a display method.

[0241] For example, for a certain PSSCH, an SCI can be carried in the PSCCH associated with the PSSCH, and an information field D1 can be included in the SCI, and the information field D1 can be used to indicate the PSFCH resource corresponding to the PSSCH.

[0242] According to the method of this embodiment, the UE can send the PSSCH and the PSCCH on K CCs, and all the PSFCH resources can be concentrated on K1 CCs. When K1 < K, there are some CCs without configured PSFCH resources. Therefore, in these CCs, some symbols can be saved for the transmission of the PSSCH and the PSCCH (or for the transmission of data), which is conducive to improving the overall resource utilization rate and data transmission efficiency.

[0243] For ease of understanding, FIG. 18 shows an example of Solution 1.

[0244] As shown in FIG. 18, the resource pool may include 3 CCs, denoted as CC#1, CC#2, and CC#3 respectively. Among them, the PSFCH resources are configured on CC#2, and the period of the appearance of the PSFCH resources is 2, that is, the PSFCH resources appear once every 2 time slots.

[0245] In Figure 18, CC#1, CC#2, and CC#3 can all be used to send PSCCH and PSSCH. CC#1 and CC#3 do not contain PSFCH resources. The PSFCH resources corresponding to the PSSCH sent on CC#1, CC#2, and CC#3 are all located on CC#2 (the arrows in Figure 18 indicate the PSFCH resources corresponding to each PSSCH). In other words, the PSFCH corresponding to the PSSCH sent on CC#1, CC#2, and CC#3 are all transmitted on CC#2. This saves time-frequency resources on CC#1 and CC#3, allowing all time-frequency resources on CC#1 and CC#3 to be used to send PSCCH and PSSCH, thereby improving overall resource utilization and data transmission efficiency.

[0246] In some embodiments, CC#1, CC#2 and CC#3 may also be used for transmission of sidelink synchronization signal blocks (S-SSB) and the like.

[0247] FIG19 is a schematic diagram showing an example of the correspondence between PSSCH and PSFCH resources, wherein PSSCH and PSFCH resources can correspond to each other in an implicit manner.

[0248] As shown in Figure 19, CC#1, CC#2, and CC#3 can be used to transmit the PSCCH and PSSCH. The PSFCH resources corresponding to the PSSCHs transmitted on CC#1, CC#2, and CC#3 are all located on CC#2. For each PSSCH on each CC, there is at least one PSFCH resource corresponding to that PSSCH on CC#2. For ease of explanation, the example in Figure 19 assumes that each PSSCH corresponds to one PSFCH resource.

[0249] In some embodiments, the PSFCH resources in a time slot may be divided into Y orthogonal PSFCH resources in the frequency domain, and the Y orthogonal PSFCH resources may correspond to different indexes / numbers. For example, in the example of FIG19 , the PSFCH resources in a time slot are divided into five orthogonal PSFCH resources in the frequency domain. The numbers 1 to 5 in the time slot in FIG19 represent the indexes corresponding to the five orthogonal PSFCH resources, respectively.

[0250] In some embodiments, the index of the PSFCH resource in a time slot may be counted in ascending order in the frequency domain starting from the PRB with the lowest frequency. For example, in Figure 19, the frequency of the PSFCH resource with index 1 (denoted as PSFCH#1) is lower than the frequency of the PSFCH resource with index 2 (denoted as PSFCH#2); the frequency of PSFCH#2 is lower than the frequency of the PSFCH resource with index 3 (denoted as PSFCH#3), and so on.

[0251] When the PSSCHs on multiple CCs correspond to the same PSFCH resource set in the same time slot on CC#2 (that is, a resource set consisting of Y orthogonal PSFCH resources), they can be jointly mapped to a PSFCH resource on CC#2 (such as the index / number corresponding to a certain PSFCH resource) based on the CC where the PSSCH is located (such as the CC index / number) and the time slot (such as the time slot index / number).

[0252] For example, in Figure 19, the PSSCH sent on time slot 1-1 of CC#1 can correspond to PSFCH#1 on time slot 2-3 of CC#2; the PSSCH sent on time slot 3-2 of CC#3 can correspond to PSFCH#5 in time slot 2-3 of CC#2 (that is, the PSFCH resource indexed as 5 in time slot 2-3).

[0253] It should be noted that some time slots on CC#1, CC#2, and CC#3 do not transmit PSSCH and PSCCH. For these time slots, corresponding PSFCH resources must also be reserved. In other words, for each time slot used to transmit PSSCH and PSCCH, there is at least one PSFCH resource corresponding to that time slot.

[0254] For example, in Figure 19, although time slot 1-2 on CC#1 does not transmit the PSCCH and PSSCH, a PSFCH resource is still reserved for this time slot 1-2. For example, time slot 1-2 may correspond to PSFCH#2 in time slot 2-3 on CC#2. Similarly, time slot 2-1 on CC#2 may correspond to PSFCH#3 in time slot 2-3 on CC#2; and time slot 3-1 on CC#3 may correspond to PSFCH#4 in time slot 2-3 on CC#2 (i.e., the PSFCH resource indexed as 4 in time slot 2-3). It should be understood that a PSFCH resource corresponding to time slot 2-2 on CC#2 also exists, but is not shown in Figure 19.

[0255] In some embodiments, the correspondence between PSSCH and PSFCH resources complies with the following correspondence rule: Y PSFCH resources within a time slot correspond to the Y time slots used for PSSCH transmission before the time slot. The Y PSFCH resources can be arranged in ascending order of index, and the Y time slots used for PSSCH transmission can be arranged in the following order: first, arrange in ascending order of CC index, and then arrange the time slots used for PSSCH transmission on each CC in ascending order. After the arrangement is completed, the Y sorted time slots used for PSSCH transmission are mapped to the Y sorted PSFCH resources respectively.

[0256] Taking the five PSFCH resources in slots 2-3 on CC#2 as an example, these five PSFCH resources can correspond to the five slots used to transmit PSSCH before slots 2-3. The five slots used to transmit PSSCH include slots 1-1 and 1-2 on CC#1, slot 2-1 on CC#2, and slots 3-1 and 3-2 on CC#3. These five slots can be sorted according to the following steps 1 and 2:

[0257] Step 1: Sort the CCs in ascending order of index. The resulting order is: CC#1, CC#2, CC#3. That is, the time slots on CC#1 (slots 1-1 and 1-2) precede the time slots on CC#2 (slot 2-1), and the time slots on CC#2 precede the time slots on CC#3 (slots 3-1 and 3-2).

[0258] Step 2: Arrange the time slots used for PSSCH transmission in each CC from smallest to largest. The ordering result is: in CC#1, time slot 1-1 is arranged before time slot 1-2; in CC#3, time slot 3-1 is arranged before time slot 3-2.

[0259] After sorting the Y time slots used for PSSCH transmission according to steps 1 and 2, the following sorting result is obtained: time slot 1-1, time slot 1-2, time slot 2-1, time slot 3-1, time slot 3-2. These five sorted time slots can then be mapped to the five sorted PSFCH resources in time slot 2-3. These five PSFCH resources are arranged in ascending order of index. For example, time slot 1-1 can be mapped to PSFCH#1 in time slot 2-3, that is, time slot 1-1 can correspond to PSFCH#1 in time slot 2-3; time slot 1-2 can be mapped to PSFCH#2 in time slot 2-3, that is, time slot 1-2 can correspond to PSFCH#2 in time slot 2-3; time slot 2-1 can be mapped to PSFCH#3 in time slot 2-3, that is, time slot 2-1 can correspond to PSFCH#3 in time slot 2-3; time slot 3-1 can be mapped to PSFCH#4 in time slot 2-3, that is, time slot 3-1 can correspond to PSFCH#4 in time slot 2-3; time slot 3-2 can be mapped to PSFCH#5 in time slot 2-3, that is, time slot 3-2 can correspond to PSFCH#5 in time slot 2-3.

[0260] In some embodiments, the correspondence between PSSCH and PSFCH resources may be indicated in a display manner.

[0261] Exemplarily, each PSCCH, when transmitted, may be associated with a PSSCH and transmitted within the same time slot. The PSCCH may carry an SCI, which may be composed of multiple information fields, including an information field D1. The information field D1 may be composed of, for example, d bits. The information field D1 may be used to indicate the PSFCH resource corresponding to the PSSCH associated with the SCI (i.e., the PSSCH associated with the PSCCH carrying the SCI), such as indicating the index of the PSFCH resource (e.g., the index of the PSFCH resource within a time slot).

[0262] For example, the PSCCH (SCI) transmitted in time slot 1-1 on CC#1 may include a 3-bit information field D1. When the content of information field D1 is 001, it may indicate PSFCH#1 in time slot 2-3 on CC#2. That is, the PSFCH resource corresponding to the PSSCH transmitted in time slot 1-1 on CC#1 is PSFCH#1 in time slot 2-3 on CC#2.

[0263] In some embodiments, when the number of CCs configured with PSFCH resources is 2 or more, the information field D1 of the SCI may indicate not only the index of the PSFCH resource but also the index of the CC.

[0264] For example, the PSCCH (SCI) transmitted in slot 1-1 on CC#1 may include a 4-bit information field D1, where the first bit may be used to indicate the CC index, and the next three bits may be used to indicate the PSFCH index. As an example, the content of information field D1 is 1001, where the first bit "1" (CC index) may be used to indicate CC#2, for example, and the next three bits "001" (PSFCH index) may be used to indicate PSFCH#1 in slot 2-3, for example. Thus, "1001" can be used to indicate PSFCH#1 in slot 2-3 on CC#2. That is, the PSFCH resource corresponding to the PSSCH transmitted in slot 1-1 on CC#1 is PSFCH#1 in slot 2-3 on CC#2.

[0265] When the system includes multiple CCs, the channel conditions of some CCs are better, while the channel conditions of some CCs are worse, and there is more interference, which leads to uneven transmission / reception performance on different CCs, thereby affecting the final transmission effect. According to the method of this embodiment, when the number of CCs configured with PSFCH resources is 2 or more, the transmitting terminal (the terminal that sends PSSCH and PSCCH) can indicate the CC where the PSFCH resources corresponding to the PSSCH associated with the SCI are located through the information field D1 in the SCI, so that the receiving terminal (the terminal that receives the PSSCH and PSCCH) can send PSFCH to the transmitting terminal on the CC to indicate whether the PSSCH is correctly received. In some implementations, the transmitting terminal can indicate a CC with better channel conditions to the receiving terminal through the information field D1. Since PSFCH is a more critical channel in the SL communication scenario, the transmission of PSFCH can directly affect the reliability of the system and the effect of retransmission. Therefore, transmitting the PSFCH indication on a CC with better channel conditions can ensure the reliability of PSFCH transmission, thereby ensuring the reliability of the system and the effect of retransmission.

[0266] In some embodiments, assuming that the time slot where a PSSCH and its associated PSCCH are located is time slot n, then when determining the time slot where the PSFCH resource corresponding to the PSSCH is located, the following rule 1 or rule 2 may be used:

[0267] Rule 1: The PSFCH resource corresponding to the PSSCH is located after time slot n and is the time slot closest to time slot n that contains the PSFCH resource.

[0268] For example, if time slot n+1 contains PSFCH resources, then the time slot where the PSFCH resources corresponding to the PSSCH are located is time slot n+1; if time slot n+1 does not contain PSFCH resources, and time slot n+2 contains PSFCH resources, then the time slot where the PSFCH resources corresponding to the PSSCH are located is time slot n+2, and so on.

[0269] Rule 2: The PSFCH resource corresponding to the PSSCH is located after time slot n+1 and is the time slot containing the PSFCH resource closest to time slot n+1.

[0270] For example, if time slot n+2 contains PSFCH resources, then the time slot where the PSFCH resources corresponding to the PSSCH are located is time slot n+2; if time slot n+2 does not contain PSFCH resources, and time slot n+3 contains PSFCH resources, then the time slot where the PSFCH resources corresponding to the PSSCH are located is time slot n+3, and so on.

[0271] It should be noted that, in some embodiments, the time slot where the PSFCH resource corresponding to the PSSCH is located may also be the time slot containing the PSFCH resource that is closest to and after time slot m, where time slot m is after time slot n. In some embodiments, the value of m is related to the time required for the receiving terminal (the terminal receiving the PSSCH) to process the received PSSCH and its associated PSCCH.

[0272] According to the method of this embodiment, the receiving terminal can determine the time slot where the PSFCH resource corresponding to the PSSCH is located according to the above rules. Therefore, when the transmitting terminal sends the PSSCH and its associated PSCCH, it can indicate the index of the PSFCH resource in the information field D1, or it can indicate the index of the PSFCH resource and the index of the CC in the information field D1 without indicating the time slot where the PSFCH resource is located.

[0273] Option 2

[0274] For ease of explanation, it is assumed below that a PSSCH is sent on CC#1, the PSFCH resource corresponding to the PSSCH is on CC#2, and the retransmission of the PSSCH is sent on CC#3 (or, the retransmission resource of the PSSCH is on CC#3).

[0275] In some embodiments, the initial transmission and retransmission of the PSSCH may be on the same or different CCs, that is, CC#1 and CC#3 may be the same CC, or CC#1 and CC#3 may be different CCs.

[0276] In some embodiments, the CC where the PSSCH retransmission resource is located may be indicated by the following method C or method D:

[0277] Method C: The SCI (carried in the PSCCH associated with the PSSCH) may include information field D2 (an example of the first indication information in the aforementioned embodiment). When the SCI includes information field D2, information field D2 can be used to indicate the CC where the PSSCH retransmission resource is located. When the SCI does not include information field D2, the PSSCH retransmission is sent on the same CC as the initial transmission, that is, the PSSCH retransmission is sent on CC#1.

[0278] Mode D: The SCI (carried in the PSCCH associated with the PSSCH) may include information field D3 (another example of the first indication information in the aforementioned embodiment). When the SCI includes information field D3, information field D3 can be used to indicate the CC where the PSSCH retransmission resources are located. When the SCI does not include information field D3, the PSSCH retransmission resources and the PSFCH resources corresponding to the PSSCH are on the same CC, that is, the PSSCH retransmission is sent on CC#2. CC#2 and CC#1 can be the same CC or different CCs.

[0279] It should be noted that since the PSSCH is used to carry TBs, the initial transmission / retransmission of the PSSCH can also be understood as the initial transmission / retransmission of the TB, and the PSFCH resources / PSCCH associated (corresponding) with the PSSCH can also be understood as the PSFCH resources / PSCCH associated (corresponding) with the TB. In some scenarios, the initial transmission of the PSSCH / TB can also be referred to as the initial transmitted PSSCH / TB, and the retransmission of the PSSCH / TB can also be referred to as the retransmitted PSSCH / TB.

[0280] For ease of understanding, an example of Solution 2 is shown in Figure 20. As shown in Figure 20, the initial transmission of TB#1 is sent in time slot 1-1 on CC#1, and the corresponding PSFCH resource is on CC#2.

[0281] For example, the PSCCH associated with the initial transmission of TB#1 (i.e., the PSCCH transmitted in timeslot 1-1) can carry the SCI with information field D2. Assuming that the CC indicated by information field D2 is CC#2, if the transmitting terminal (the terminal transmitting TB#1) receives a NACK or no ACK on the corresponding PSFCH resource (the PSFCH resource in timeslot 2-3 on CC#2), TB#1 can be retransmitted on CC#2. For example, in Figure 20, the transmitting terminal can retransmit TB#1 in timeslot 2-6 on CC#2.

[0282] For example, the PSCCH associated with TB#1 retransmitted in timeslots 2-6 on CC#2 may also carry the SCI with information field D2. Assuming that the CC indicated by information field D2 is also CC#2, if the transmitting terminal receives a NACK or no ACK on the corresponding PSFCH resource (the PSFCH resource in timeslots 2-7 on CC#2), TB#1 may be retransmitted on CC#2. For example, in Figure 20, the transmitting terminal may retransmit TB#1 on timeslots 2-9 on CC#2.

[0283] In some embodiments, the information field D2 carried in the SCI corresponding to each transmission (including initial transmission and retransmission) of TB#1 may indicate the same CC, such as CC#2. Then, each retransmission of TB#1 may be performed on CC#2.

[0284] Figure 21 shows another example of Solution 2. As shown in Figure 21 , the initial transmission of TB#1 is sent in time slot 1-1 on CC#1, and the corresponding PSFCH resource is on CC#2.

[0285] In some embodiments, if the SCI carried by the PSCCH associated with the initial transmission of TB#1 (i.e., the PSCCH transmitted in time slot 1-1) does not carry the information field D2, then the next retransmission of TB#1 can be sent on the same CC as the initial transmission of TB#1, that is, on CC#1. For example, in Figure 21, assuming that the SCI carried by the PSCCH transmitted in time slot 1-1 does not carry the information field D2, then if the transmitting terminal receives a NACK or no ACK on the PSFCH resource in time slot 2-3 on CC#2, the transmitting terminal can retransmit TB#1 in time slots 1-6 on CC#1.

[0286] In some embodiments, if the SCI carried by the PSCCH associated with the first retransmission of TB#1 (i.e., the PSCCH transmitted in time slots 1-6) does not carry the information field D2, then the next retransmission (second retransmission) of TB#1 may also be sent on CC#1. For example, in Figure 21, assuming that the SCI carried by the PSCCH transmitted in time slots 1-6 also does not carry the information field D2, then if the transmitting terminal receives a NACK or no ACK on the PSFCH resources in time slots 2-7 on CC#2, the transmitting terminal may retransmit TB#1 in time slots 1-9 on CC#1.

[0287] In some embodiments, the SCI corresponding to each transmission (including initial transmission and retransmission) of TB#1 does not carry the information field D2. Therefore, the initial transmission and subsequent retransmissions of TB#1 can be sent on the same CC (CC#1).

[0288] In some embodiments, the PSCCH associated with the initial transmission of TB#1 (i.e., the PSCCH transmitted in time slot 1-1) may carry an SCI with information field D2. If the CC indicated by information field D2 is CC#1, the next retransmission of TB#1 may be sent on CC#1. For example, in Figure 21 , assuming that the PSCCH transmitted in time slot 1-1 carries an SCI with information field D2, and the CC indicated by information field D2 is CC#1, then if the transmitting terminal receives a NACK or no ACK on the PSFCH resource in time slot 2-3 on CC#2, the transmitting terminal may retransmit TB#1 in time slots 1-6 on CC#1.

[0289] In some embodiments, the PSCCH associated with the first retransmission of TB#1 (i.e., the PSCCH transmitted in time slots 1-6) may also carry an SCI carrying information field D2. If the CC indicated by information field D2 is also CC#1, the next retransmission (second retransmission) of TB#1 may also be sent on CC#1. For example, in Figure 21, assuming that the PSCCH transmitted in time slots 1-6 carries an SCI carrying information field D2, and the CC indicated by information field D2 is also CC#1, then if the transmitting terminal receives a NACK or does not receive an ACK on the PSFCH resources in time slots 2-7 on CC#2, the transmitting terminal may retransmit TB#1 in time slots 1-9 on CC#1.

[0290] In some embodiments, the information field D2 carried in the SCI corresponding to each transmission of TB#1 (including initial transmission and retransmission) may indicate the same CC, such as CC#1. Then, the initial transmission and subsequent retransmissions of TB#1 may be sent on the same CC (CC#1).

[0291] Figure 22 shows another example of Solution 2. As shown in Figure 22, the initial transmission of TB#1 is sent in time slot 1-1 on CC#1, and the corresponding PSFCH resource is on CC#2.

[0292] For example, the PSCCH associated with the initial transmission of TB#1 (i.e., the PSCCH transmitted in timeslot 1-1) can carry the SCI with information field D3. Assuming that the CC indicated by information field D3 is CC#3, if the transmitting terminal receives a NACK or no ACK on the corresponding PSFCH resource (the PSFCH resource in timeslot 2-3 on CC#2), TB#1 can be retransmitted on CC#3. For example, in Figure 22, the transmitting terminal can retransmit TB#1 in timeslots 3-5 on CC#3.

[0293] For example, the PSCCH associated with TB#1 retransmitted in slots 3-5 on CC#3 may also carry the SCI with information field D3. Assuming that the CC indicated by information field D3 is CC#1, if the transmitting terminal receives a NACK or no ACK on the corresponding PSFCH resource (PSFCH resources in slots 2-7 on CC#2), the next retransmission of TB#1 may be performed on CC#1. For example, in Figure 22, the transmitting terminal may perform the next retransmission of TB#1 in slots 1-9 on CC#1.

[0294] In some embodiments, the initial transmission of TB#1 is sent on CC#1, and the PSFCH resources corresponding to the initial and retransmissions of TB#1 are both on CC#2. In this case, if the SCI corresponding to each transmission of TB#1 (including the initial transmission and retransmission) does not carry the information field D3, then the retransmissions of TB#1 are all sent on CC#2, that is, the retransmissions of TB#1 are all sent on the CC where the PSFCH resources are located.

[0295] The information transmission method provided in the embodiments of the present application can solve the following problems in current SL technology:

[0296] In current SL technology, the carrier aggregation mechanism supports feedback, but data transmission, corresponding feedback information, and retransmission on each carrier / CC are limited to the same carrier, and there is no cross-carrier scheduling, feedback, or retransmission solution. This leads to the following problems:

[0297] 1) The system contains multiple carriers, each subject to varying channel conditions and interference. For example, some frequency bands are relatively busy or subject to significant interference, resulting in poor communication conditions on these carriers. If a terminal uses a carrier / CC with poor communication conditions for transmission, the terminal's communication quality and performance will remain poor, impacting communication performance and effectiveness over the long term.

[0298] 2) In current technology, the initial transmission, feedback (PSFCH), and retransmission of a TB are all restricted to the same carrier / CC, and cross-carrier scheduling or retransmission is not possible. Due to different services, some carriers may be busy for a long time, resulting in high resource congestion. All terminals using these carriers will be restricted to transmitting both initial and retransmissions on the same carrier, further exacerbating resource congestion.

[0299] Regarding the above problems 1) and 2), the method of the embodiment of the present application can flexibly allocate the initial transmission, feedback, and retransmission of data to be transmitted on different carrier components, avoiding the problem that the long-term communication quality of carriers with poor communication conditions is poor. In addition, through explicit / implicit indication methods, the resources for initial transmission, feedback, and retransmission are flexibly indicated on different carriers, enabling flexible use of resources on different carriers. Among them, the implicit indication method can further save the load of indication information. In the scenario of carrier aggregation, the method of the embodiment of the present application is beneficial to improving the resource utilization rate and flexibility on multiple carriers, and further improving the performance of feedback and retransmission in a multi-carrier system.

[0300] 3) In the current technology, each carrier / CC contains PSFCH feedback resource information. The PSFCH within a time slot occupies at least 2 symbols, and an additional symbol is required as a gap (GAP) for transceiver conversion. That is to say, at least 3 symbols out of the 14 symbols in a time slot cannot be used for data transmission, and this is the case for each carrier. Therefore, in the scenario of carrier aggregation, there are a large number of symbols that cannot be used for data transmission, resulting in a low resource utilization rate.

[0301] Regarding the above problem 3), in the embodiment of the present application, for K CCs available for transmitting PSSCH and PSCCH, all PSFCH resources can be concentrated on K1 of these CCs. When K1 < K, there are some CCs without PSFCH resources configured. Therefore, in these CCs, some symbols can be saved for the transmission of PSSCH and PSCCH, which is beneficial to improving the system resource utilization rate and data transmission efficiency.

[0302] The preferred embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all fall within the protection scope of the present application. For example, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present application will not separately describe various possible combination methods. Again, any combination can be made between various different embodiments of the present application as long as it does not violate the idea of the present application, and it should also be regarded as the content disclosed by the present application. Again, for example, on the premise of no conflict, the various embodiments described in the present application and / or the technical features in each embodiment can be combined arbitrarily with the prior art, and the technical solutions obtained after combination should also fall within the protection scope of the present application.

[0303] It should also be understood that in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply a precedence in the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application. In addition, in the embodiments of the present application, the terms "downlink," "uplink," and "sidelink" are used to indicate the transmission direction of signals or data, where "downlink" is used to indicate the first direction of transmission of signals or data from a site to a user equipment in a cell, "uplink" is used to indicate the second direction of transmission of signals or data from a user equipment in a cell to a site, and "sidelink" is used to indicate the third direction of transmission of signals or data from user equipment 1 to user equipment 2. For example, "downlink signal" indicates that the transmission direction of the signal is the first direction. In addition, in the embodiments of the present application, the term "and / or" is merely a description of the association relationship between associated objects, indicating that three relationships can exist. Specifically, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0304] Based on the aforementioned embodiments, the embodiments of the present application provide corresponding information transmission devices.

[0305] FIG23 is a schematic diagram of the structure of the information transmission device provided in an embodiment of the present application, which is applied to the first terminal. As shown in FIG23, the information transmission device 2300 (hereinafter referred to as the device 2300) includes:

[0306] The first sending unit 2301 is configured to send multiple physical sidelink shared channels PSSCH and physical sidelink control channels PSCCH associated with the multiple PSSCHs to the second terminal on multiple carrier components CC; wherein PSFCH resources corresponding to the multiple PSSCHs are located on some CCs among the multiple CCs.

[0307] In some embodiments, multiple PSSCHs include a first PSSCH; the PSFCH resources corresponding to the first PSSCH are related to the CC and time slot where the first PSSCH is located; or, the PSFCH resources corresponding to the first PSSCH are related to the starting position of the frequency domain resources where the first PSCCH is located and the time slot where the first PSSCH is located, and the first PSCCH is associated with the first PSSCH.

[0308] In some embodiments, the multiple PSSCHs also include a second PSSCH, the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are located in the first time slot on the same CC, and the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are orthogonal in the frequency domain.

[0309] In some embodiments, when the first PSSCH and the second PSSCH are located in different CCs, and the index of the CC where the first PSSCH is located is smaller than the index of the CC where the second PSSCH is located, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is smaller than the index of the PSFCH resource corresponding to the second PSSCH in the first time slot.

[0310] In some embodiments, when the first PSSCH and the second PSSCH are located in the same CC, and the time slot where the first PSSCH is located is before the time slot where the second PSSCH is located, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is smaller than the index of the PSFCH resource corresponding to the second PSSCH in the first time slot.

[0311] In some embodiments, the multiple PSSCHs include a first PSSCH; a PSFCH resource corresponding to the first PSSCH is indicated by first sidelink control information SCI, and the first SCI is carried in a PSCCH associated with the first PSSCH.

[0312] In some embodiments, the PSFCH resource corresponding to the first PSSCH is located in the first time slot; when some CCs include one CC, the first SCI is used to indicate the index of the PSFCH resource corresponding to the first PSSCH in the first time slot; when some CCs include multiple CCs, the first SCI is used to indicate the index of the CC where the PSFCH resource corresponding to the first PSSCH is located, and the index of the PSFCH resource corresponding to the first PSSCH in the first time slot.

[0313] In some embodiments, the PSFCH resources corresponding to the first PSSCH are located in the first time slot, and the first time slot is: a time slot containing PSFCH resources after the second time slot and closest to the second time slot; or, a time slot containing PSFCH resources after the third time slot and closest to the third time slot; the second time slot is the time slot where the first PSSCH is located, and the third time slot is located after the second time slot.

[0314] In some embodiments, the third time slot is the next time slot of the second time slot.

[0315] In some embodiments, the multiple PSSCHs include a first PSSCH; the first PSSCH is located in a first CC, and retransmission resources of the first PSSCH are located in a second CC, and the second CC is the same as or different from the first CC.

[0316] In some embodiments, when the first SCI includes first indication information, the first indication information is used to indicate the second CC; when the first SCI does not include the first indication information, the second CC is the same as the first CC, or the second CC is the same as the third CC, and the third CC is the CC where the PSFCH resources corresponding to the first PSSCH are located; the first SCI is carried in the PSCCH associated with the first PSSCH.

[0317] In some embodiments, the third CC is the same as or different from the first CC.

[0318] In some embodiments, the second CC is preconfigured; or, the second CC is configured by a network device; or, the second CC is determined by the apparatus 2300 .

[0319] In some embodiments, the first PSSCH is an initially transmitted or retransmitted PSSCH.

[0320] FIG24 is a second schematic diagram of the structure of an information transmission device provided in an embodiment of the present application, which is applied to a second terminal. As shown in FIG24 , an information transmission device 2400 (hereinafter referred to as device 2400 ) includes:

[0321] The first receiving unit 2401 is configured to receive multiple physical sidelink shared channels PSSCHs and physical sidelink control channels PSCCHs associated with the multiple PSSCHs from the first terminal on multiple carrier components CC; wherein PSFCH resources corresponding to the multiple PSSCHs are located on some CCs among the multiple CCs.

[0322] In some embodiments, multiple PSSCHs include a first PSSCH; the PSFCH resources corresponding to the first PSSCH are related to the CC and time slot where the first PSSCH is located; or, the PSFCH resources corresponding to the first PSSCH are related to the starting position of the frequency domain resources where the first PSCCH is located and the time slot where the first PSSCH is located, and the first PSCCH is associated with the first PSSCH.

[0323] In some embodiments, the multiple PSSCHs also include a second PSSCH, the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are located in the first time slot on the same CC, and the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are orthogonal in the frequency domain.

[0324] In some embodiments, when the first PSSCH and the second PSSCH are located in different CCs, and the index of the CC where the first PSSCH is located is smaller than the index of the CC where the second PSSCH is located, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is smaller than the index of the PSFCH resource corresponding to the second PSSCH in the first time slot.

[0325] In some embodiments, when the first PSSCH and the second PSSCH are located in the same CC, and the time slot where the first PSSCH is located is before the time slot where the second PSSCH is located, the index of the PSFCH resource corresponding to the first PSSCH in the first time slot is smaller than the index of the PSFCH resource corresponding to the second PSSCH in the first time slot.

[0326] In some embodiments, the multiple PSSCHs include a first PSSCH; a PSFCH resource corresponding to the first PSSCH is indicated by first sidelink control information SCI, and the first SCI is carried in a PSCCH associated with the first PSSCH.

[0327] In some embodiments, the PSFCH resource corresponding to the first PSSCH is located in the first time slot; when some CCs include one CC, the first SCI is used to indicate the index of the PSFCH resource corresponding to the first PSSCH in the first time slot; when some CCs include multiple CCs, the first SCI is used to indicate the index of the CC where the PSFCH resource corresponding to the first PSSCH is located, and the index of the PSFCH resource corresponding to the first PSSCH in the first time slot.

[0328] In some embodiments, the PSFCH resources corresponding to the first PSSCH are located in the first time slot, and the first time slot is: a time slot containing PSFCH resources after the second time slot and closest to the second time slot; or, a time slot containing PSFCH resources after the third time slot and closest to the third time slot; the second time slot is the time slot where the first PSSCH is located, and the third time slot is located after the second time slot.

[0329] In some embodiments, the third time slot is the next time slot of the second time slot.

[0330] In some embodiments, the multiple PSSCHs include a first PSSCH; the first PSSCH is located in a first CC, and retransmission resources of the first PSSCH are located in a second CC, and the second CC is the same as or different from the first CC.

[0331] In some embodiments, when the first SCI includes first indication information, the first indication information is used to indicate the second CC; when the first SCI does not include the first indication information, the second CC is the same as the first CC, or the second CC is the same as the third CC, and the third CC is the CC where the PSFCH resources corresponding to the first PSSCH are located; the first SCI is carried in the PSCCH associated with the first PSSCH.

[0332] In some embodiments, the third CC is the same as or different from the first CC.

[0333] In some embodiments, the second CC is preconfigured; or, the second CC is configured by a network device; or, the second CC is determined by the first terminal.

[0334] In some embodiments, the first PSSCH is an initially transmitted or retransmitted PSSCH.

[0335] FIG25 is a third schematic diagram of the structure of an information transmission device provided in an embodiment of the present application, which is applied to a first terminal. As shown in FIG25 , an information transmission device 2500 (hereinafter referred to as device 2500 ) includes:

[0336] The second sending unit 2501 is configured to send a physical sidelink shared channel PSSCH and a physical sidelink control channel PSCCH associated with the PSSCH on a first component carrier CC. The retransmission resource of the PSSCH is located in a second CC, and the second CC is indicated by the PSCCH.

[0337] In some embodiments, the PSCCH includes sidelink control information SCI; when the SCI includes first indication information, the first indication information is used to indicate a second CC, which is the same as or different from the first CC; when the SCI does not include the first indication information, the second CC is the same as the first CC, or the second CC is the same as the third CC, and the third CC is the CC where the PSFCH resources corresponding to the PSSCH are located.

[0338] In some embodiments, the third CC is the same as or different from the first CC.

[0339] In some embodiments, the second CC is preconfigured; or, the second CC is configured by a network device; or, the second CC is determined by the apparatus 2500 .

[0340] In some embodiments, the PSSCH is an initial transmission or a retransmission PSSCH.

[0341] FIG26 is a fourth structural diagram of an information transmission device provided in an embodiment of the present application, which is applied to a second terminal. As shown in FIG26 , an information transmission device 2600 (hereinafter referred to as device 2600 ) includes:

[0342] The second receiving unit 2601 is configured to receive a physical sidelink control channel PSCCH from the first terminal. The PSCCH and the physical sidelink shared channel PSSCH associated with the PSCCH are transmitted through the first carrier component CC. The retransmission resource of the PSSCH is located in the second CC, and the second CC is indicated by the PSCCH.

[0343] In some embodiments, the PSCCH includes sidelink control information SCI; when the SCI includes first indication information, the first indication information is used to indicate a second CC, which is the same as or different from the first CC; when the SCI does not include the first indication information, the second CC is the same as the first CC, or the second CC is the same as the third CC, and the third CC is the CC where the PSFCH resources corresponding to the PSSCH are located.

[0344] In some embodiments, the third CC is the same as or different from the first CC.

[0345] In some embodiments, the second CC is preconfigured; or, the second CC is configured by a network device; or, the second CC is determined by the first terminal.

[0346] In some embodiments, the PSSCH is an initial transmission or a retransmission PSSCH.

[0347] Those skilled in the art should understand that the relevant description of the above-mentioned information transmission device in the embodiment of the present application can be understood with reference to the relevant description of the information transmission method in the embodiment of the present application.

[0348] Figure 27 is a schematic structural diagram of a communication device 2700 provided in an embodiment of the present application. The communication device 2700 shown in Figure 27 includes a processor 2710, which can call and run a computer program from a memory to implement the method in the embodiment of the present application.

[0349] Optionally, as shown in FIG27 , the communication device 2700 may further include a memory 2720. The processor 2710 may call and execute a computer program from the memory 2720 to implement the method in the embodiment of the present application.

[0350] The memory 2720 may be a separate device independent of the processor 2710 , or may be integrated into the processor 2710 .

[0351] Optionally, as shown in FIG27 , the communication device 2700 may further include a transceiver 2730 , and the processor 2710 may control the transceiver 2730 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.

[0352] The transceiver 2730 may include a transmitter and a receiver. The transceiver 2730 may further include an antenna, and the number of antennas may be one or more.

[0353] Optionally, the communication device 2700 may specifically be the first terminal of an embodiment of the present application, and the communication device 2700 may implement the corresponding processes implemented by the first terminal in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0354] Optionally, the communication device 2700 may specifically be the second terminal of the embodiment of the present application, and the communication device 2700 may implement the corresponding processes implemented by the second terminal in each method of the embodiment of the present application. For the sake of brevity, they will not be repeated here.

[0355] Figure 28 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 2800 shown in Figure 28 includes a processor 2810, which can call and run a computer program from a memory to implement the method according to the embodiment of the present application.

[0356] Optionally, as shown in FIG28 , the chip 2800 may further include a memory 2820 , wherein the processor 2810 may call and execute a computer program from the memory 2820 to implement the method in the embodiment of the present application.

[0357] The memory 2820 may be a separate device independent of the processor 2810 , or may be integrated into the processor 2810 .

[0358] Optionally, the chip 2800 may further include an input interface 2830. The processor 2810 may control the input interface 2830 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.

[0359] Optionally, the chip 2800 may further include an output interface 2840. The processor 2810 may control the output interface 2840 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.

[0360] Optionally, the chip can be applied to the first terminal in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the first terminal in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0361] Optionally, the chip can be applied to the second terminal in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the second terminal in each method of the embodiment of the present application. For the sake of brevity, it will not be repeated here.

[0362] It should be understood that the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.

[0363] It should be understood that the processor of the embodiments of the present application may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method embodiment can be completed by hardware integrated logic circuits in the processor or software instructions. The above processor can be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. The various methods, steps, and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a storage medium mature in the art, such as random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0364] It is understood that the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM bus random access memory (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0365] It should be understood that the above-mentioned memories are exemplary but not restrictive. For example, the memories in the embodiments of the present application may also be static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct RAM RAM (DR RAM), etc. In other words, the memories in the embodiments of the present application are intended to include, but are not limited to, these and any other suitable types of memories.

[0366] An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.

[0367] Optionally, the computer-readable storage medium can be applied to the first terminal in the embodiment of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the first terminal in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0368] Optionally, the computer-readable storage medium can be applied to the second terminal in the embodiment of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the second terminal in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0369] An embodiment of the present application also provides a computer program product, including computer program instructions.

[0370] Optionally, the computer program product can be applied to the first terminal in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the first terminal in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0371] Optionally, the computer program product can be applied to the second terminal in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the second terminal in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0372] The embodiment of the present application also provides a computer program.

[0373] Optionally, the computer program can be applied to the first terminal in the embodiment of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the first terminal in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0374] Optionally, the computer program can be applied to the second terminal in the embodiment of the present application. When the computer program runs on the computer, the computer executes the corresponding processes implemented by the second terminal in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.

[0375] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0376] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0377] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0378] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0379] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0380] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0381] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An information transmission method, applied to a first terminal, the method comprising: Sending a plurality of physical sidelink shared channels (PSSCH) to a second terminal on a plurality of carrier components (CC), and a physical sidelink control channel (PSCCH) associated with the plurality of PSSCH; Wherein, the PSFCH resources corresponding to the plurality of PSSCH are located on some of the plurality of CC.

2. The method according to claim 1, wherein, The plurality of PSSCH includes a first PSSCH; The PSFCH resources corresponding to the first PSSCH are related to the CC and time slot where the first PSSCH is located; or, The PSFCH resources corresponding to the first PSSCH are related to the starting position of the frequency domain resources where the first PSCCH is located and the time slot where the first PSSCH is located, and the first PSCCH is associated with the first PSSCH.

3. The method according to claim 2, wherein, The plurality of PSSCH further includes a second PSSCH, the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are located in a first time slot on the same CC, and the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are orthogonal in the frequency domain.

4. The method according to claim 3, wherein, In the case where the first PSSCH and the second PSSCH are on different CC, and the index of the CC where the first PSSCH is located is less than the index of the CC where the second PSSCH is located, the index of the PSFCH resources corresponding to the first PSSCH in the first time slot is less than the index of the PSFCH resources corresponding to the second PSSCH in the first time slot.

5. The method according to claim 3 or 4, wherein, In the case where the first PSSCH and the second PSSCH are on the same CC, and the time slot where the first PSSCH is located is before the time slot where the second PSSCH is located, the index of the PSFCH resources corresponding to the first PSSCH in the first time slot is less than the index of the PSFCH resources corresponding to the second PSSCH in the first time slot.

6. The method according to claim 1, wherein The plurality of PSSCH includes a first PSSCH; The PSFCH resources corresponding to the first PSSCH are indicated by a first sidelink control information (SCI), and the first SCI is carried in the PSCCH associated with the first PSSCH.

7. The method according to claim 6, wherein, The PSFCH resources corresponding to the first PSSCH are located in a first time slot; In the case where the part of the CC includes one CC, the first SCI is used to indicate the index of the PSFCH resources corresponding to the first PSSCH in the first time slot; In the case where the part of the CC includes a plurality of CC, the first SCI is used to indicate the index of the CC where the PSFCH resources corresponding to the first PSSCH are located, and the index of the PSFCH resources corresponding to the first PSSCH in the first time slot.

8. The method according to any one of claims 2 to 7, wherein the PSFCH resource corresponding to the first PSSCH is located within a first time slot, and the first time slot is: a time slot that comes after the second time slot and is the closest to the second time slot and contains a PSFCH resource; or, a time slot that comes after the third time slot and is the closest to the third time slot and contains a PSFCH resource; the second time slot is the time slot where the first PSSCH is located, and the third time slot is after the second time slot.

9. The method according to claim 8, wherein the third time slot is the next time slot after the second time slot.

10. The method according to any one of claims 1 to 9, wherein The plurality of PSSCHs includes a first PSSCH; the first PSSCH is located in a first CC, and the retransmission resource of the first PSSCH is located in a second CC, and the second CC is the same as or different from the first CC.

11. The method according to claim 10, wherein when the first SCI includes first indication information, the first indication information is used to indicate the second CC; when the first SCI does not include the first indication information, the second CC is the same as the first CC, or the second CC is the same as a third CC, and the third CC is the CC where the PSFCH resource corresponding to the first PSSCH is located; the first SCI is carried in a PSCCH associated with the first PSSCH.

12. The method according to claim 11, wherein the third CC is the same as or different from the first CC.

13. The method according to any one of claims 10 to 12, wherein the second CC is pre-configured; or, the second CC is configured by a network device; or, the second CC is determined by the first terminal.

14. The method according to any one of claims 10 to 13, wherein the first PSSCH is an initial transmission or retransmission PSSCH.

15. An information transmission method, applied to a second terminal, the method comprising: receiving, on a plurality of carrier components CC, a plurality of physical sidelink shared channels PSSCH from a first terminal, and physical sidelink control channels PSCCH associated with the plurality of PSSCHs; wherein the PSFCH resources corresponding to the plurality of PSSCHs are located on some of the plurality of CCs.

16. The method according to claim 15, wherein, The plurality of PSSCHs includes a first PSSCH; the PSFCH resource corresponding to the first PSSCH is related to the CC and time slot where the first PSSCH is located; or, the PSFCH resource corresponding to the first PSSCH is related to the starting position of the frequency domain resource where the first PSCCH is located and the time slot where the first PSSCH is located, and the first PSCCH is associated with the first PSSCH.

17. The method according to claim 16, wherein The plurality of PSSCHs further includes a second PSSCH. The PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are located in a first time slot on the same CC, and the PSFCH resources corresponding to the first PSSCH and the PSFCH resources corresponding to the second PSSCH are orthogonal in the frequency domain.

18. The method according to claim 17, wherein when the first PSSCH and the second PSSCH are on different CCs, and the index of the CC where the first PSSCH is located is less than the index of the CC where the second PSSCH is located, the index of the PSFCH resources corresponding to the first PSSCH in the first time slot is less than the index of the PSFCH resources corresponding to the second PSSCH in the first time slot.

19. The method according to claim 17 or 18, wherein when the first PSSCH and the second PSSCH are on the same CC, and the time slot where the first PSSCH is located is before the time slot where the second PSSCH is located, the index of the PSFCH resources corresponding to the first PSSCH in the first time slot is less than the index of the PSFCH resources corresponding to the second PSSCH in the first time slot.

20. The method according to claim 15, wherein, The plurality of PSSCHs includes a first PSSCH; The PSFCH resources corresponding to the first PSSCH are indicated by a first sidelink control information SCI, and the first SCI is carried in a PSCCH associated with the first PSSCH.

21. The method according to claim 20, wherein The PSFCH resources corresponding to the first PSSCH are located in a first time slot; when the partial CCs include one CC, the first SCI is used to indicate the index of the PSFCH resources corresponding to the first PSSCH in the first time slot; when the partial CCs include multiple CCs, the first SCI is used to indicate the index of the CC where the PSFCH resources corresponding to the first PSSCH are located, and the index of the PSFCH resources corresponding to the first PSSCH in the first time slot.

22. The method according to any one of claims 16 to 21, wherein The PSFCH resources corresponding to the first PSSCH are located in a first time slot, and the first time slot is: a time slot that is after the second time slot and is the closest to the second time slot and contains PSFCH resources; or, a time slot that is after the third time slot and is the closest to the third time slot and contains PSFCH resources; The second time slot is the time slot where the first PSSCH is located, and the third time slot is after the second time slot.

23. The method according to claim 22, wherein The third time slot is the next time slot of the second time slot.

24. The method according to any one of claims 15 to 23, wherein The plurality of PSSCHs includes a first PSSCH; The first PSSCH is located in a first CC, and the retransmission resources of the first PSSCH are located in a second CC, and the second CC is the same as or different from the first CC.

25. The method according to claim 24, wherein when the first SCI contains first indication information, the first indication information is used to indicate the second CC; when the first SCI does not contain the first indication information, the second CC is the same as the first CC, or the second CC is the same as a third CC, and the third CC is the CC where the PSFCH resource corresponding to the first PSSCH is located; the first SCI is carried in a PSCCH associated with the first PSSCH.

26. The method according to claim 25, wherein the third CC is the same as or different from the first CC.

27. The method according to any one of claims 24 to 26, wherein the second CC is pre-configured; or the second CC is configured by a network device; or the second CC is determined by the first terminal.

28. The method according to any one of claims 24 to 27, wherein the first PSSCH is an initial transmission or retransmission PSSCH.

29. An information transmission method, applied to a first terminal, the method comprising: transmitting a physical side-link shared channel PSSCH and a physical side-link control channel PSCCH associated with the PSSCH on a first carrier component CC, wherein a retransmission resource of the PSSCH is located on a second CC, and the second CC is indicated by the PSCCH.

30. The method according to claim 29, wherein, The PSCCH contains side-link control information SCI; when the SCI contains first indication information, the first indication information is used to indicate the second CC, and the second CC is the same as or different from the first CC; when the SCI does not contain the first indication information, the second CC is the same as the first CC, or the second CC is the same as a third CC, and the third CC is the CC where the PSFCH resource corresponding to the PSSCH is located.

31. The method according to claim 30, wherein the third CC is the same as or different from the first CC.

32. The method according to any one of claims 29 to 31, wherein the second CC is pre-configured; or the second CC is configured by a network device; or the second CC is determined by the first terminal.

33. The method according to any one of claims 29 to 32, wherein the PSSCH is an initial transmission or retransmission PSSCH.

34. An information transmission method, applied to a second terminal, the method comprising: receiving a physical side-link control channel PSCCH from a first terminal, wherein the PSCCH and a physical side-link shared channel PSSCH associated with the PSCCH are transmitted through a first carrier component CC, and a retransmission resource of the PSSCH is located on a second CC, and the second CC is indicated by the PSCCH.

35. The method according to claim 34, wherein, The PSCCH contains side-link control information SCI; when the SCI contains first indication information, the first indication information is used to indicate the second CC, and the second CC is the same as or different from the first CC; In the case that the SCI does not include the first indication information, the second CC is the same as the first CC, or the second CC is the same as a third CC, where the third CC is the CC where the PSFCH resource corresponding to the PSSCH is located.

36. The method according to claim 35, wherein the third CC is the same as or different from the first CC.

37. The method according to any one of claims 34 to 36, wherein the second CC is pre-configured; or the second CC is configured by a network device; or the second CC is determined by the first terminal.

38. The method according to any one of claims 34 to 37, wherein the PSSCH is an initial transmission or retransmission PSSCH.

39. An information transmission device, the device comprising: a first transmission unit configured to transmit a plurality of physical sidelink shared channels PSSCH and physical sidelink control channels PSCCH associated with the plurality of PSSCH on a plurality of carrier components CC; wherein the PSFCH resources corresponding to the plurality of PSSCH are located on some of the plurality of CC.

40. An information transmission device, the device comprising: a first reception unit configured to receive a plurality of physical sidelink shared channels PSSCH and physical sidelink control channels PSCCH associated with the plurality of PSSCH from a first terminal on a plurality of carrier components CC; wherein the PSFCH resources corresponding to the plurality of PSSCH are located on some of the plurality of CC.

41. An information transmission device, the device comprising: a second transmission unit configured to transmit a physical sidelink shared channel PSSCH and a physical sidelink control channel PSCCH associated with the PSSCH on a first carrier component CC, wherein the retransmission resources of the PSSCH are located on a second CC, and the second CC is indicated by the PSCCH.

42. An information transmission device, the device comprising: a second reception unit configured to receive a physical sidelink control channel PSCCH from a first terminal, wherein the PSCCH and the physical sidelink shared channel PSSCH associated with the PSCCH are transmitted through a first carrier component CC, and the retransmission resources of the PSSCH are located on a second CC, and the second CC is indicated by the PSCCH.

43. A communication device, the communication device comprising: a memory for storing a computer program; a processor connected to the memory for calling and running the computer program from the memory to implement the method according to any one of claims 1 to 14, or the method according to any one of claims 15 to 28, or the method according to any one of claims 29 to 33, or the method according to any one of claims 34 to 38; a transceiver for receiving and sending information during the process of receiving and sending information with other devices.

44. A chip, the chip comprising: A processor, configured to call and run a computer program from a memory, such that a device installed with the chip executes the method according to any one of claims 1 to 14, or the method according to any one of claims 15 to 28, or the method according to any one of claims 29 to 33, or the method according to any one of claims 34 to 38; A transceiver, configured for receiving and sending information during the process of receiving and sending information between a device and the chip.

45. A computer-readable storage medium, configured to store a computer program, where the computer program causes a computer to execute the method according to any one of claims 1 to 14, or the method according to any one of claims 15 to 28, or the method according to any one of claims 29 to 33, or the method according to any one of claims 34 to 38.

46. A computer program product, comprising computer program instructions, where the computer program instructions cause a computer to execute the method according to any one of claims 1 to 14, or the method according to any one of claims 15 to 28, or the method according to any one of claims 29 to 33, or the method according to any one of claims 34 to 38.

47. A computer program, where the computer program causes a computer to execute the method according to any one of claims 1 to 14, or the method according to any one of claims 15 to 28, or the method according to any one of claims 29 to 33, or the method according to any one of claims 34 to 38.

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