Methods, apparatus, communication equipment and storage media for determining PSSCH resources

Abstract

This disclosure provides a method, apparatus, communication device, and storage medium for determining Physical Shared Channel (PSSCH) resources on a physical side crosslink. The method includes: determining a target PSFCH timing from M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH of a transport block (TB); determining the minimum time interval between any two PSSCH resources selected for the TB based on the target PSFCH timing; wherein the time interval between any two PSSCH resources selected for a TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources used for the transmission and retransmission of the TB; the first PSSCH of the two PSSCH resources supports HARQ feedback; and M is an integer greater than 1. Thus, when transmitting a TB based on unlicensed frequency band PSSCH resources, it can be ensured that the minimum time interval is met between any two PSSCH resources selected for the TB, thereby ensuring that the TB supports retransmission based on HARQ feedback.

Description

Technical Field

[0001] This disclosure relates to, but is not limited to, the field of wireless communication technology, and particularly to a method, apparatus, communication device, and storage medium for determining Physical Sidelink Shared Channel (PSSCH) resources. Background Technology

[0002] In wireless communication technology, the unlicensed frequency band of the sidelink (SL) can support the transmission of transport blocks (TBs). To ensure the reliability of TB transmission, a hybrid automatic repeat request (HARQ) mechanism can be introduced. Under HARQ support for TBs, the selection of TB transmission resources is a crucial consideration. Summary of the Invention

[0003] This disclosure provides a method, apparatus, communication device, and storage medium for determining physical side link shared channel (PSSCH) resources.

[0004] According to a first aspect of the present disclosure, a method for determining physical side crosslink shared channel (PSSCH) resources is provided, wherein the method is executed by a first terminal, and the method includes:

[0005] The target PSFCH timing is determined from the M physical shared feedback channel (PSFCH) timings mapped by the PSSCH where the transport block TB is located;

[0006] Based on the target PSFCH timing, determine the minimum time interval between any two PSSCH resources selected by the TB;

[0007] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0008] According to a second aspect of the present disclosure, a method for transmitting PSSCH resources is provided, wherein the method is executed by a second terminal, and the method includes:

[0009] Receive the TB sent by the first terminal on the PSSCH resource;

[0010] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0011] According to a third aspect of the present disclosure, an apparatus for determining physical-side cross-link shared channel (PSSCH) resources is provided, wherein the apparatus includes:

[0012] The determining module is configured to determine a target PSFCH timing from M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block (TB) is located; and based on the target PSFCH timing, determine the minimum time interval for selecting PSSCH resources for the TB; wherein the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0013] According to a fourth aspect of the present disclosure, a PSSCH resource transmission apparatus is provided, wherein the apparatus includes:

[0014] The receiving module is configured to receive TB sent by the first terminal on the PSSCH resource;

[0015] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0016] According to a fifth aspect of the present disclosure, a communication device is provided, the communication device comprising:

[0017] processor;

[0018] Memory used to store the processor's executable instructions;

[0019] The processor is configured to implement the method described in any embodiment of this disclosure when running the executable instructions.

[0020] According to a sixth aspect of the present disclosure, a computer storage medium is provided, the computer storage medium storing a computer executable program, which, when executed by a processor, implements the methods described in any embodiment of the present disclosure.

[0021] In this embodiment of the disclosure, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH of the transport block TB. Based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined. The time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval. The PSSCH resources are unlicensed frequency band resources used for the transmission of the TB. The first PSSCH of the two PSSCH resources supports HARQ feedback. M is an integer greater than 1. Here, the minimum time interval between any two PSSCH resources selected for the TB can be determined based on the determination of the target PSFCH timing from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH of the transport block TB, and the determination that the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval. Thus, when transmitting the TB based on unlicensed frequency band PSSCH resources, it can be ensured that the minimum time interval is met between any two PSSCH resources selected for the TB, thereby ensuring that the TB supports retransmission based on HARQ feedback. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the structure of a wireless communication system according to an exemplary embodiment.

[0023] Figure 2 This is a flowchart illustrating a method for determining PSSCH resources according to an exemplary embodiment.

[0024] Figure 3 This is a flowchart illustrating a method for determining PSSCH resources according to an exemplary embodiment.

[0025] Figure 4 This is a flowchart illustrating a method for determining PSSCH resources according to an exemplary embodiment.

[0026] Figure 5 This is a flowchart illustrating a method for determining PSSCH resources according to an exemplary embodiment.

[0027] Figure 6This is a flowchart illustrating a method for determining PSSCH resources according to an exemplary embodiment.

[0028] Figure 7 This is a flowchart illustrating a method for determining PSSCH resources according to an exemplary embodiment.

[0029] Figure 8 This is a flowchart illustrating a method for determining PSSCH resources according to an exemplary embodiment.

[0030] Figure 9 This is a flowchart illustrating a method for determining PSSCH resources according to an exemplary embodiment.

[0031] Figure 10 This is a flowchart illustrating a method for transmitting PSSCH resources according to an exemplary embodiment.

[0032] Figure 11 This is a flowchart illustrating a method for transmitting PSSCH resources according to an exemplary embodiment.

[0033] Figure 12 This is a flowchart illustrating a method for transmitting PSSCH resources according to an exemplary embodiment.

[0034] Figure 13 This is a flowchart illustrating a method for transmitting PSSCH resources according to an exemplary embodiment.

[0035] Figure 14 This is a flowchart illustrating a method for transmitting PSSCH resources according to an exemplary embodiment.

[0036] Figure 15 This is a schematic diagram of a PSSCH resource determination apparatus according to an exemplary embodiment.

[0037] Figure 16 This is a schematic diagram of a PSSCH resource transmission apparatus according to an exemplary embodiment.

[0038] Figure 17 This is a schematic diagram of the structure of a terminal according to an exemplary embodiment.

[0039] Figure 18 This is a block diagram illustrating a base station according to an exemplary embodiment. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those of this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the embodiments of this disclosure as detailed in the appended claims.

[0041] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0042] It should be understood that although the terms first, second, third, etc., may be used to describe various information in embodiments of this disclosure, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first information may also be referred to as second information without departing from the scope of embodiments of this disclosure, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to a determination."

[0043] For the sake of brevity and ease of understanding, the terms “greater than” or “less than” are used in this document to characterize size relationships. However, it will be understood by those skilled in the art that the term “greater than” also includes the meaning of “greater than or equal to”, and “less than” also includes the meaning of “less than or equal to”.

[0044] Please refer to Figure 1 This illustration shows a schematic diagram of the structure of a wireless communication system provided in an embodiment of this disclosure. Figure 1 As shown, the wireless communication system is a communication system based on mobile communication technology. The wireless communication system may include: several user equipment 110 and several base stations 120.

[0045] User equipment 110 may be a device that provides voice and / or data connectivity to users. User equipment 110 may communicate with one or more core networks via a Radio Access Network (RAN). User equipment 110 may be an Internet of Things (IoT) user equipment, such as sensor devices, mobile phones, and computers with IoT user equipment capabilities. For example, it may be a fixed, portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted device. Examples include a station (STA), subscriber unit, subscriber station, mobile station, mobile station, remote station, access point, remote terminal, access terminal, user terminal, user agent, user device, or user equipment. Alternatively, user equipment 110 may also be a device from an unmanned aerial vehicle (UAV). Alternatively, user equipment 110 may also be a vehicle-mounted device, such as a vehicle computer with wireless communication capabilities, or a wireless user equipment connected to an external vehicle computer. Alternatively, user equipment 110 can also be a roadside device, such as a street light, traffic light, or other roadside device with wireless communication capabilities.

[0046] Base station 120 can be a network-side device in a wireless communication system. This wireless communication system can be a fourth-generation mobile communication (4G) system, also known as a Long Term Evolution (LTE) system; or it can be a 5G system, also known as a New Radio (NR) system; or it can be the next generation after 5G. In this case, the access network in the 5G system can be called NG-RAN (New Generation-Radio Access Network).

[0047] The base station 120 can be an evolved NB (eNB) used in a 4G system. Alternatively, the base station 120 can also be a gNB (gNB) using a centralized-distributed architecture in a 5G system. When the base station 120 adopts a centralized-distributed architecture, it typically includes a central unit (CU) and at least two distributed units (DUs). The central unit is equipped with a protocol stack of the Packet Data Convergence Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the Media Access Control (MAC) layer; the distributed units are equipped with a physical (PHY) layer protocol stack. This disclosure does not limit the specific implementation of the base station 120.

[0048] Base station 120 and user equipment 110 can establish a wireless connection via a wireless air interface. In different implementations, the wireless air interface is a wireless air interface based on the fourth-generation mobile communication network technology (4G) standard; or, the wireless air interface is a wireless air interface based on the fifth-generation mobile communication network technology (5G) standard, such as a new air interface; or, the wireless air interface can also be a wireless air interface based on a next-generation mobile communication network technology standard based on 5G.

[0049] In some embodiments, user equipment 110 can also establish E2E (End to End) connections. Examples include V2V (vehicle to vehicle), V2I (vehicle to Infrastructure), and V2P (vehicle to pedestrian) communication scenarios in vehicle-to-everything (V2X) communication.

[0050] Here, the user equipment mentioned above can be considered as the terminal equipment in the following embodiments.

[0051] In some embodiments, the wireless communication system described above may further include a network management device 130.

[0052] Several base stations 120 are connected to network management device 130. Network management device 130 can be a core network device in a wireless communication system, such as a Mobility Management Entity (MME) in an Evolved Packet Core (EPC). Alternatively, it can be other core network devices, such as a Serving Gateway (SGW), a Public Data Network Gateway (PGW), a Policy and Charging Rules Function (PCRF), or a Home Subscriber Server (HSS). The implementation of network management device 130 is not limited in this embodiment.

[0053] To facilitate understanding by those skilled in the art, this disclosure provides multiple embodiments to clearly illustrate the technical solutions of the embodiments of this disclosure. Of course, those skilled in the art will understand that the multiple embodiments provided in this disclosure can be executed individually, or in combination with the methods of other embodiments in this disclosure, or individually or in combination with some methods in other related technologies; this disclosure does not limit these aspects.

[0054] To better understand the embodiments of this disclosure, the following describes application scenarios in wireless communication:

[0055] In one embodiment, in the design of the sidelink licensed frequency band, if the resource pool is configured with Physical Sidelink Feedback Channel (PSFCH) resources and retransmissions supporting HARQ feedback are configured, it is necessary to ensure that any two Physical Sidelink Shared Channel (PSSCH) resources selected for one TB satisfy a minimum time interval X (between initial transmission resources and retransmission resources, or between retransmission resources), where X = a + b. Here, a can be the time interval between the end position of the last symbol of a resource selected for PSSCH transmission for that TB and the start position of the first symbol of the corresponding PSFCH reception. The PSFCH reception position is determined by the resource pool's sl-MinTimeGapPSFCH and sl-PSFCH-Period. B can be the time required for PSFCH reception and processing, as well as sidechain retransmission preparation. The time required for PSFCH reception and processing includes the processing time for the necessary physical channel multiplexing and any transmission-to-reception (TX-RX) or reception-to-transmission (RX-TX) switching time.

[0056] In one embodiment, in sidelink communication, a minimum time interval a+b must be satisfied between any two resources selected for one TB. Here, 'a' represents the time interval between the end of the last symbol of the PSSCH transmission of the first resource and the start of the first symbol of the PSFCH reception corresponding to the PSSCH, and 'b' represents the time required for PSFCH reception and processing, as well as sidelink retransmission preparation, including necessary physical channel multiplexing processing time and any TX-RX / RX-TX switching time. In sidelink communication, one PSSCH has only one corresponding PSFCH occasion, so the value of 'a' is calculated based on this single PSFCH occasion. When the sidelink operates in an unlicensed frequency band, one PSSCH can support multiple PSFCH occasions through a one-to-many mapping between PSSCH and PSFCH, and TB transmission supports retransmission based on HARQ feedback. However, there is no corresponding solution for calculating the minimum time interval a+b based on the PSFCH occasion and selecting retransmission resources based on this minimum time interval.

[0057] like Figure 2 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a first terminal, and the method includes:

[0058] Step 21: Determine the target PSFCH timing from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block TB is located;

[0059] Step 22: Based on the target PSFCH timing, determine the minimum time interval between any two PSSCH resources selected for the TB; wherein, the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0060] Here, the terminal involved in this disclosure may be, but is not limited to, a mobile phone, wearable device, vehicle terminal, roadside unit (RSU), smart home terminal, industrial sensing device and / or medical device, etc. In some embodiments, the terminal may be a Redcap terminal or a predetermined version of a New Radio (NR) terminal (e.g., an R17 NR terminal).

[0061] In one embodiment, the first terminal and the second terminal involved in this disclosure can be two terminals communicating via sidelink. The first terminal can be the terminal that sends TB, and the second terminal can be the terminal that receives TB. The terms "first terminal" and "sender" can be interchanged, and the terms "second terminal" and "receiver" can be interchanged.

[0062] In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block (TB) is located; based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined; wherein, when the target PSFCH timing is the Mth PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0063] In one embodiment, the second time interval is the sum of the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0064] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0065] In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH of the transport block (TB). Based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined. Wherein, when the target PSFCH timing is the Mth PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval. Wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing; the second time interval includes: the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for retransmission preparation on the side link; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1. For example, please refer to [link to example]. Figure 3 The first time interval is the time interval between the end position of the last symbol of the PSSCH sent by the first PSSCH resource and the start position of the first symbol of the PSSCH received at the target PSFCH timing, which is 11 slots; the second time interval is a predetermined value, for example, the predetermined value is 2 slots, then the minimum time interval between the initial PSSCH resource selected for TB and the retransmitted PSSCH resource is 13 slots (i.e., 11 slots + 2 slots), then the PSSCH resource located in slot 14 can be selected for retransmission.

[0066] In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block (TB) is located; based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined; wherein, when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback, and M is an integer greater than 1.

[0067] In one embodiment, the second time interval is the sum of the time for receiving the PSFCH at the Mth PSFCH timing, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0068] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX). In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block (TB) is located; based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined; wherein, when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol of PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving PSFCH at the Mth PSFCH timing, the time for processing PSFCH, and the time required for retransmission preparation on the side link; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback, and M is an integer greater than 1. For example, sl-MinTimeGapPSFCH = 3 slots, sl-PSFCH-Period = 4 slots, the first terminal sends PSSCH1 on slot 0, and this PSSCH1 maps to 3 PSFCH occasions, located in slots 3, 7, and 11 respectively. If the minimum interval between any two resources selected for TB is determined based on the first PSFCH occasion (i.e., slot 3), for example, a+b = 4 slots, where a is the first time interval and b is the second time interval, then the retransmission resources located in slots 5, 10, and 15 are selected. In one embodiment, if LBT fails on the first PSFCH occasion slots 3 and 7, and the first terminal does not receive HARQ information, then the retransmission resources located in slots 5 and 10 selected by the first terminal will not be used for data transmission.

[0069] In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block (TB) is located; based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined; wherein, when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval, a second time interval, and a third time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0070] In one embodiment, the second time interval is the sum of the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0071] In one embodiment, the third time interval is (M-1) sidelink PSFCH cycles.

[0072] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0073] In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block (TB) is located; based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined; wherein, when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval, a second time interval, and a third time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing, the second time interval includes: the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the sidelink to prepare for retransmission, and the third time interval is (M-1) sidelink PSFCH cycles; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1. Here, the side link PSFCH period can be sl-PSFCH-Period.

[0074] For example, please see Figure 4 The first time interval is 3 slots, the second time interval is 8 slots, and the third time interval is 2 slots. Based on the above minimum time intervals, the interval between the first retransmission resource and the initial transmission resource selected for this TB is 13 time slots, that is, the PSSCH resource located in slot 14 is selected. It should be noted that each PSSCH timing is located on the last 3 symbols of a time slot, that is, on symbols 11, 12, and 13 of a time slot (symbol 0 is the starting symbol).

[0075] For example, sl-MinTimeGapPSFCH = 3 slots, sl-PSFCH-Period = 4 slots, PSSCH1 is sent on slot 0, and this PSSCH maps to 3 PSFCH occasions, located in slot 3, slot 7 and slot 11 respectively. The minimum interval between any two resources selected for TB is determined by the 3rd PSFCH occasion, which is X = a + b + 2 × 4 = 14 slots. Therefore, the retransmission resource selected for the PSSCH sent on slot 0 needs to be 14 slots apart from slot 0. Thus, the retransmission resource located on slot 15 can be selected.

[0076] In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block (TB) is located; based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined; wherein, when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0077] In one embodiment, the second time interval is the sum of the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0078] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0079] In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH of the transport block (TB). Based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined. When the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval. The first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received at the target PSFCH timing. The second time interval includes: the time for receiving the PSFCH timing, the time for processing the PSFCH timing, and the time required for retransmission preparation on the side link. The time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval. The PSSCH resources are unlicensed frequency band resources used for the transmission of the TB. The first PSSCH of any two PSSCHs supports HARQ feedback. M is an integer greater than 1.

[0080] For example, please see Figure 5sl-MinTimeGapPSFCH = 3 slots, sl-PSFCH-Period = 4 slots. PSSCH1 is sent on slot 0, and this PSSCH1 maps to 3 PSFCH occasions, located in slots 3, 7, and 11 respectively. The first PSFCH occasion determines the minimum interval between any two resources selected for TB. For example, a+b = 4 slots, where a is the first time interval and b is the second time interval. Then, the retransmission resources located in slots 5, 10, and 15 are selected. If the first terminal successfully performs LBT on slot 3 on the first PSFCH occasion and sends NACK, the sending UE can use the retransmission resources located in slot 5 to perform retransmission as early as possible, reducing the retransmission latency.

[0081] In one embodiment, a target PSFCH timing is determined from M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH of the transport block (TB). Based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined. When the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval. The first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received at the target PSFCH timing. The second time interval includes: the time for receiving the PSFCH timing, the time for processing the PSFCH timing, and the time required for retransmission preparation on the side link, including necessary physical channel multiplexing and any TX-RX / RX-TX switching time. The time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval. The PSSCH resources are unlicensed band resources used for the transmission of the TB. The first PSSCH of any two PSSCH resources supports HARQ feedback. M is an integer greater than 1. If no HARQ information is received at the first PSFCH timing, retransmission is performed using the selected retransmission resources; if no HARQ information is received at the Nth PSFCH timing, retransmission is not performed using the selected retransmission resources; where N is an integer, 1≤N<M; and / or, if no HARQ information is received at the Mth PSFCH timing, retransmission is performed using the selected retransmission resources.

[0082] In one embodiment, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH of the transport block (TB). Based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined; wherein the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1. The TB is transmitted to a second terminal on the PSSCH resources selected for the TB.

[0083] In this embodiment of the disclosure, a target PSFCH timing is determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH of the transport block TB. Based on the target PSFCH timing, the minimum time interval between any two PSSCH resources selected for the TB is determined. The time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval. The PSSCH resources are unlicensed frequency band resources used for the transmission of the TB. The first PSSCH of the two PSSCH resources supports HARQ feedback. M is an integer greater than 1. Here, the minimum time interval between any two PSSCH resources selected for the TB can be determined based on the determination of the target PSFCH timing from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH of the transport block TB, and the determination that the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval. Thus, when transmitting the TB based on unlicensed frequency band PSSCH resources, it can be ensured that the minimum time interval is satisfied between any two selected PSSCH resources.

[0084] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0085] like Figure 6 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a first terminal, and the method includes:

[0086] Step 61: Determine the target PSFCH timing from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block TB is located;

[0087] Step 62: Based on the target PSFCH timing, determine the minimum time interval between any two PSSCH resources selected for the TB; wherein, when the target PSFCH timing is the Mth PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission; the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission and retransmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0088] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0089] For detailed explanations of steps 61 and 62, please refer to steps 21 and 22, which will not be repeated here.

[0090] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0091] like Figure 7 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a first terminal, and the method includes:

[0092] Step 71: Determine the target PSFCH timing from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block TB is located;

[0093] Step 72: Based on the target PSFCH timing, determine the minimum time interval between any two PSSCH resources selected for the TB; wherein, when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol of PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving PSFCH at the Mth PSFCH timing, the time for processing PSFCH, and the time required for retransmission preparation on the side link; the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0094] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0095] For detailed explanations of steps 71 and 72, please refer to steps 21 and 22, which will not be repeated here.

[0096] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0097] like Figure 8 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a first terminal, and the method includes:

[0098] Step 81: Determine the target PSFCH timing from the M physical shared feedback channel (PSFCH) timings mapped by the PSSCH where the transport block TB is located;

[0099] Step 82: Based on the target PSFCH timing, determine the minimum time interval between any two PSSCH resources selected for the TB; wherein, when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval, the second time interval, and the third time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing; the second time interval includes: the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the sidelink to prepare for retransmission; the third time interval is (M-1) sidelink PSFCH cycles; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0100] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0101] Here, the side link PSFCH period can be sl-PSFCH-Period.

[0102] For detailed explanations of steps 81 and 82, please refer to steps 21 and 22, which will not be repeated here.

[0103] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0104] like Figure 9 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a first terminal, and the method includes:

[0105] Step 91: Determine the target PSFCH timing from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block TB is located;

[0106] Step 92: Based on the target PSFCH timing, determine the minimum time interval between any two PSSCH resources selected for the TB; wherein, when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol received by the PSFCH at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH timing, the time for processing the PSFCH timing, and the time required for the side link to prepare for retransmission; the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0107] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0108] For detailed explanations of steps 91 and 92, please refer to steps 21 and 22, which will not be repeated here.

[0109] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0110] like Figure 10 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a second terminal, and the method includes:

[0111] Step 101: Receive the TB sent by the first terminal on the PSSCH resource;

[0112] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0113] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the Mth PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein the first time interval is the time interval between the end position of the last symbol of the PSSCH transmitted by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing.

[0114] In one embodiment, the second time interval is the sum of the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0115] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0116] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the Mth PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein the first time interval is the time interval between the end position of the last symbol of the PSSCH transmitted by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0117] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1. The PSSCH includes the initial PSSCH and the retransmitted PSSCH; HARQ feedback is not performed on the PSFCH timings after the first PSFCH timing mapped from the initial PSSCH, but on the PSFCH timings mapped from the retransmitted PSSCH, wherein the first PSFCH timing is the PSFCH timing of the first LBT success among the M PSFCH timings.

[0118] For example, when the first terminal does not receive any HARQ information on the first PSFCH timing, the first terminal uses the selected retransmission resource to retransmit. At this time, the second terminal does not perform HARQ feedback on the initial PSSCH on the remaining PSFCH mapped to the PSFCHHoccasion (the PSFCH timing after the first PSFCH timing), but only performs HARQ feedback on the retransmitted PSSCH. Therefore, the second terminal only feeds back 1 bit of HARQ information for this TB, and the first terminal will also only receive 1 bit of HARQ feedback information.

[0119] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1. The PSSCH includes the initial PSSCH and the retransmitted PSSCH; HARQ feedback is performed on the initial PSSCH and on the retransmitted PSSCH.

[0120] For example, when the first terminal does not receive any HARQ information on the first PSSCH occasion, the first terminal uses the selected retransmission resource to retransmit. At this time, the second terminal performs HARQ feedback on the initial PSSCH and also performs HARQ feedback on the retransmitted PSSCH. However, the second terminal merges the HARQ information of the initial and retransmitted PSSCH and feeds back 1 bit of HARQ information. When the receiving UE feeds back this 1 bit of HARQ information on the PSSCH mapping PSSCH occasion, the first terminal will also only receive 1 bit of HARQ feedback information.

[0121] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1. The PSSCH includes an initial PSSCH and a retransmitted PSSCH; the HARQ feedback results of the initial PSSCH and the retransmitted PSSCH are merged to obtain a merged HARQ feedback result; the merged HARQ feedback result is fed back on the PFCH timing mapped to the retransmitted PSSCH.

[0122] For example, the second terminal performs one of the following:

[0123] For the initial PSSCH, the second terminal decodes and obtains ACK. For the retransmitted PSSCH, the second terminal decodes and obtains ACK. Then, the second terminal merges the HARQ information of the initial PSSCH and the retransmitted PSSCH into ACK, and the second terminal will send back 1 bit of ACK to the first terminal.

[0124] For the initial PSSCH, the second terminal decodes and obtains ACK; for the retransmitted PSSCH, the second terminal decodes and obtains NACK. Then, the second terminal merges the HARQ information of the initial PSSCH and the retransmitted PSSCH into ACK, and the second terminal will send back 1 bit of ACK to the first terminal.

[0125] For the initial PSSCH, the second terminal decodes and obtains NACK; for the retransmitted PSSCH, the second terminal decodes and obtains ACK. Then the first terminal combines the HARQ information of the initial PSSCH and the retransmitted PSSCH into ACK, and the second terminal will send back 1 bit of ACK to the first terminal.

[0126] For the initial PSSCH, the second terminal decodes and obtains NACK. For the retransmitted PSSCH, the second terminal decodes and obtains NACK. Then, the second terminal combines the HARQ information of the initial PSSCH and the retransmitted PSSCH into NACK, and the second terminal will send back 1 bit of NACK to the first terminal.

[0127] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1. The PSSCH includes the initial PSSCH and the retransmitted PSSCH; HARQ feedback is performed on the PSFCH timing after the first PSFCH timing mapped from the initial PSSCH and on the PSFCH timing mapped from the retransmitted PSSCH, wherein the first PSFCH timing is the PSFCH timing of the first LBT success among the M PSFCH timings.

[0128] For example, the second terminal performs one of the following:

[0129] For the initial PSSCH, if the second terminal successfully decodes it, it will send back an ACK; for the retransmitted PSSCH, if the second terminal successfully decodes it, it will send back an ACK.

[0130] For the initial PSSCH, if the second terminal fails to decode it, it will send a NACK response; for the retransmitted PSSCH, if the second terminal successfully decodes it, it will send an ACK response.

[0131] For the initial PSSCH, if the second terminal successfully decodes it, it will send back an ACK; for the retransmitted PSSCH, if the second terminal fails to decode it, it will send back a NACK.

[0132] For the initial PSSCH transmission, if the second terminal fails to decode it, it will send a NACK response. For the retransmitted PSSCH transmission, if the second terminal fails to decode it, it will send a NACK response.

[0133] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein the first time interval is the time interval between the end position of the last symbol of the PSSCH transmitted by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing.

[0134] In one embodiment, the second time interval is the sum of the time for receiving the PSFCH at the Mth PSFCH timing, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0135] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0136] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH at the Mth PSFCH timing, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0137] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval, a second time interval, and a third time interval; wherein the first time interval is the time interval between the end position of the last symbol of the PSSCH transmitted by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing.

[0138] In one embodiment, the second time interval is the sum of the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0139] In one embodiment, the third time interval is (M-1) sidelink PSFCH cycles.

[0140] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0141] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval, a second time interval, and a third time interval; wherein the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing, the second time interval includes: the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission, and the third time interval is (M-1) side link PSFCH cycles.

[0142] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein the first time interval is the time interval between the end position of the last symbol of the PSSCH transmitted by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing.

[0143] In one embodiment, the second time interval is the sum of the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0144] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0145] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of a first time interval and a second time interval; wherein the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH timing, the time for processing the PSFCH timing, and the time required for the side link to prepare for retransmission.

[0146] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1. Listen-before-tell (LBT) is performed on the M PSFCH timings; and Hybrid Automatic Repeat Request (HARQ) information is sent at the location of one or more PSFCH timings where LBT is successfully performed.

[0147] In one embodiment, a TB transmitted by a first terminal is received on a PSSCH resource; wherein the time interval between any two PSSCH resources selected for one TB is not less than a minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1. Hybrid Automatic Repeat Request (HARQ) information is sent only at the location of the first PSFCH timing after a successful LBT, and LBT is not performed on PSFCH timings after the first successful LBT.

[0148] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0149] like Figure 11 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a second terminal, and the method includes:

[0150] Step 111: Receive the TB sent by the first terminal on the PSSCH resource;

[0151] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the Mth PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol of the PSSCH transmission of the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

[0152] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0153] For a detailed explanation of step 111, please refer to step 101; it will not be repeated here.

[0154] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0155] like Figure 12 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a second terminal, and the method includes:

[0156] Step 121: Receive the TB sent by the first terminal on the PSSCH resource;

[0157] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol of PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving PSFCH at the Mth PSFCH timing, the time for processing PSFCH, and the time required for the side link to prepare for retransmission.

[0158] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0159] For a detailed explanation of step 121, please refer to step 101; it will not be repeated here.

[0160] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0161] like Figure 13 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a second terminal, and the method includes:

[0162] Step 131: Receive the TB sent by the first terminal on the PSSCH resource;

[0163] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval, the second time interval, and the third time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol of PSFCH received at the target PSFCH timing, the second time interval includes: the time for receiving PSFCH, the time for processing PSFCH, and the time required for the side link to prepare for retransmission, and the third time interval is (M-1) side link PSFCH cycles.

[0164] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0165] For a detailed explanation of step 131, please refer to step 101; it will not be repeated here.

[0166] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0167] like Figure 14 As shown, this embodiment provides a method for determining physical side crosslink shared channel (PSSCH) resources, wherein the method is executed by a second terminal, and the method includes:

[0168] Step 141: Receive the TB sent by the first terminal on the PSSCH resource;

[0169] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; M is an integer greater than 1; when the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol used for PSSCH transmission by the first PSSCH resource and the start position of the first symbol of the PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH timing, the time for processing the PSFCH timing, and the time required for the side link to prepare for retransmission.

[0170] In one embodiment, the time for receiving and processing the PSFCH includes: the processing time for the necessary physical channel multiplexing, and any switching time between transmit to receive (TX-RX) or receive to transmit (RX-TX).

[0171] For a detailed explanation of step 141, please refer to step 101; it will not be repeated here.

[0172] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0173] like Figure 15 As shown in the figure, this disclosure provides a device for determining physical-side cross-link shared channel (PSSCH) resources, wherein the device includes:

[0174] The determining module 151 is configured to determine a target PSFCH timing from the M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH where the transport block TB is located; and based on the target PSFCH timing, determine the minimum time interval for selecting PSSCH resources for the TB; wherein the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0175] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0176] like Figure 16 As shown, this embodiment of the disclosure provides a PSSCH resource transmission apparatus, wherein the apparatus includes:

[0177] Receiver module 161 is configured to receive TB sent by the first terminal on the PSSCH resource;

[0178] Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports HARQ feedback; and M is an integer greater than 1.

[0179] It should be noted that those skilled in the art will understand that the methods provided in the embodiments of this disclosure can be executed alone or together with some methods in the embodiments of this disclosure or some methods in related technologies.

[0180] This disclosure provides an information indication system, which includes a terminal and an access network device; the terminal is used to execute any of the methods executed by the terminal in this disclosure, and the access network device is used to execute any of the methods executed by the access network device in this disclosure.

[0181] This disclosure provides a communication device, which includes:

[0182] processor;

[0183] Memory used to store processor-executable instructions;

[0184] The processor is configured to implement, when running executable instructions, the methods applicable to any embodiment of this disclosure.

[0185] The processor may include various types of storage media, which are non-transitory computer storage media that can continue to store information after the communication device loses power.

[0186] The processor can connect to the memory via a bus or other means to read executable programs stored in the memory.

[0187] This disclosure also provides a computer storage medium storing a computer executable program, which, when executed by a processor, implements the method of any embodiment of this disclosure.

[0188] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0189] like Figure 17 As shown, one embodiment of this disclosure provides a terminal structure.

[0190] Reference Figure 17 This embodiment provides a terminal 800, which may specifically be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0191] Reference Figure 17 Terminal 800 may include one or more of the following components: processing component 802, memory 804, power supply component 806, multimedia component 808, audio component 810, input / output (I / O) interface 812, sensor component 814, and communication component 816.

[0192] Processing component 802 typically controls the overall operation of terminal 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0193] Memory 804 is configured to store various types of data to support operation on terminal 800. Examples of this data include instructions for any application or method operating on terminal 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0194] Power supply component 806 provides power to various components of terminal 800. Power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to terminal 800.

[0195] Multimedia component 808 includes a screen that provides an output interface between terminal 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of touch or swipe actions but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When terminal 800 is in an operating mode, such as a shooting mode or video mode, the front-facing camera and / or rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0196] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when terminal 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0197] I / O interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0198] Sensor assembly 814 includes one or more sensors for providing state assessments of various aspects of terminal 800. For example, sensor assembly 814 can detect the on / off state of terminal 800, the relative positioning of components such as the display and keypad of terminal 800, changes in the position of terminal 800 or a component of terminal 800, the presence or absence of user contact with terminal 800, the orientation or acceleration / deceleration of terminal 800, and temperature changes of terminal 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0199] Communication component 816 is configured to facilitate wired or wireless communication between terminal 800 and other devices. Terminal 800 can access wireless networks based on communication standards, such as Wi-Fi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0200] In an exemplary embodiment, terminal 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0201] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions, which can be executed by a processor 820 of a terminal 800 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0202] like Figure 18 As shown, one embodiment of this disclosure illustrates the structure of a base station. For example, base station 900 can be provided as a network-side device. (Refer to...) Figure 18The base station 900 includes a processing component 922, which further includes one or more processors, and memory resources represented by a memory 932 for storing instructions executable by the processing component 922, such as application programs. The application programs stored in the memory 932 may include one or more modules, each corresponding to a set of instructions. Furthermore, the processing component 922 is configured to execute instructions to perform any of the methods described above applied to the base station.

[0203] Base station 900 may also include a power supply component 926 configured to perform power management of base station 900, a wired or wireless network interface 950 configured to connect base station 900 to a network, and an input / output (I / O) interface 958. Base station 900 can operate on an operating system stored in memory 932, such as Windows Server™, Mac OS X™, Unix™, Linux™, FreeBSD™, or similar.

[0204] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0205] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method for determining physical-side cross-link shared channel (PSSCH) resources, wherein, The method is executed by a first terminal, and the method includes: The target PSFCH timing is determined from the M physical shared feedback channel (PSFCH) timings mapped by the PSSCH where the transport block TB is located; Based on the target PSFCH timing, determine the minimum time interval between any two PSSCH resources selected by the TB; Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports Hybrid Automatic Repeat Request (HARQ) feedback, and M is an integer greater than 1; The PSSCH includes the initial PSSCH and the retransmitted PSSCH, and the method further includes: The merged HARQ feedback result is received at the PFCH time of the retransmitted PSSCH. The merged HARQ feedback result is obtained by merging the HARQ feedback result of the initial PSSCH and the HARQ feedback result of the retransmitted PSSCH.

2. The method according to claim 1, wherein, When the target PSFCH timing is the Mth PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol of the first PSSCH resource used for PSSCH transmission and the start position of the first symbol of the PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

3. The method according to claim 1, wherein, When the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol of the first PSSCH resource used for PSSCH transmission and the start position of the first symbol of the PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH at the Mth PSFCH timing, the time for processing the PSFCH, and the time required for the side link to prepare for retransmission.

4. The method according to claim 1, wherein, When the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval, the second time interval, and the third time interval; wherein, the first time interval is the time interval between the end position of the last symbol of the first PSSCH resource used for PSSCH transmission and the start position of the first symbol of the PSFCH received at the target PSFCH timing, the second time interval includes: the time for receiving PSFCH, the time for processing PSFCH, and the time required for the side link to prepare for retransmission, and the third time interval is (M-1) side link PSFCH cycles.

5. The method according to claim 1, wherein, When the target PSFCH timing is the first PSFCH timing, the minimum time interval is the sum of the first time interval and the second time interval; wherein, the first time interval is the time interval between the end position of the last symbol of the first PSSCH resource used for PSSCH transmission and the start position of the first symbol of the PSFCH received at the target PSFCH timing, and the second time interval includes: the time for receiving the PSFCH timing, the time for processing the PSFCH timing, and the time required for the side link to prepare for retransmission.

6. The method according to any one of claims 1 to 5, wherein, The method further includes at least one of the following: If no HARQ information is received on the first PSFCH timing, a retransmission is performed using the selected retransmission resource; If no HARQ information is received at the Nth PSFCH timing, the selected retransmission resources are not used to perform a retransmission; where N is an integer, 1≤N<M; If no HARQ information is received at the Mth PSFCH time, a retransmission is performed using the selected retransmission resource.

7. The method according to claim 1, wherein, The method further includes: On the PSSCH resource selected for the TB, the TB is sent to the second terminal.

8. A method for transmitting PSSCH resources, wherein, The method is executed by a second terminal, and the method includes: Receive the TB sent by the first terminal on the PSSCH resource; Wherein, the time interval between any two PSSCH resources selected for 1 TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports Hybrid Automatic Repeat Request (HARQ) feedback; and M is an integer greater than 1. The PSSCH includes the initial PSSCH and the retransmitted PSSCH, and the method further includes: The HARQ feedback results of the initial PSSCH and the HARQ feedback results of the retransmitted PSSCH are merged to obtain the merged HARQ feedback result. Feedback of the merged HARQ result is given at the PFCH time point of the retransmitted PSSCH mapping.

9. The method according to claim 8, wherein, The method further includes: Perform the Listen-Before-Speak LBT at the M PSFCH times; Send a Hybrid Automatic Repeat Request (HARQ) message at one or more candidate PSFCH timings when LBT is successful.

10. The method according to claim 9, wherein, Sending HARQ information at one or more PSFCH timing points when LBT is successful includes: HARQ information is sent only at the position of the first PSFCH timing after LBT success, and LBT is not performed at PSFCH timings after the first PSFCH timing after LBT success.

11. The method according to claim 8, wherein, The method also includes one of the following: HARQ feedback is not performed on the PSFCH timing after the first PSFCH timing of the initial PSSCH mapping, but on the PSFCH timing of the retransmitted PSSCH mapping. HARQ feedback is performed on the initial PSSCH and on the retransmitted PSSCH. HARQ feedback is performed at the PSFCH timing after the first PSFCH timing of the initial PSSCH mapping and at the PSFCH timing of the retransmitted PSSCH mapping. The first PSFCH timing is the first LBT successful PSFCH timing among M PSFCH timings.

12. A device for determining physical-side cross-link shared channel (PSSCH) resources, wherein, The device includes: The determining module is configured to determine a target PSFCH timing from M Physical Shared Feedback Channel (PSFCH) timings mapped by the PSSCH of the transport block (TB); based on the target PSFCH timing, determine the minimum time interval for selecting PSSCH resources for the TB; wherein the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the PSSCH resources are unlicensed frequency band resources and are used for the transmission of the TB; the first PSSCH of any two PSSCHs supports Hybrid Automatic Repeat Request (HARQ) feedback; M is an integer greater than 1; the PSSCH includes the initial PSSCH and the retransmitted PSSCH. The receiving module is configured to receive the merged HARQ feedback result at the time of the PFCH mapped by the retransmitted PSSCH. The merged HARQ feedback result is obtained by merging the HARQ feedback result of the initial PSSCH and the HARQ feedback result of the retransmitted PSSCH.

13. A device for transmitting PSSCH resources, wherein, The device includes: The receiving module is configured to receive TB sent by the first terminal on the PSSCH resource; Wherein, the time interval between any two PSSCH resources selected for one TB is not less than the minimum time interval; the minimum time interval is the time interval determined by the target PSFCH timing determined from the M Physical Shared Feedback Channel (PSFCH) timings mapped from the PSSCH where the TB is located; the PSSCH resource is an unlicensed frequency band resource and is used for the transmission of the TB; the first PSSCH of any two PSSCHs supports Hybrid Automatic Repeat Request (HARQ) feedback; M is an integer greater than 1; the PSSCH includes the initial PSSCH and the retransmitted PSSCH. The receiving module is further configured to perform the following steps: merge the HARQ feedback result of the initial PSSCH and the HARQ feedback result of the retransmitted PSSCH to obtain a merged HARQ feedback result; and feed back the merged HARQ feedback result at the PFCH time mapped by the retransmitted PSSCH.

14. A communication device, wherein, include: One or more processors; The processor is configured to invoke instructions to cause the communication device to perform the method according to any one of claims 1 to 7 or claims 8 to 11.

15. A storage medium storing instructions, characterized in that, When the instructions are executed on the communication device, the communication device performs the method as described in any one of claims 1 to 7 or 8 to 11.

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