A method and apparatus used in a node for wireless communication

Abstract

The application discloses a method and device used in a node for wireless communication. A first node receives first signaling used for triggering first channel sensing; performs the first channel sensing used for determining a first time-frequency resource block; sends second signaling used for indicating a target identity and the first time-frequency resource block; the first signaling indicates a first identity and a first parameter; the first identity is used for identifying a second node; the first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first parameter is used for performing the first channel sensing; the first identity is used for determining the target identity; and the first time-frequency resource block is reserved for transmission of the first signal. The application reduces scheduling delay and signaling interaction overhead of inter-user cooperation.

Description

Technical Field

[0001] This application relates to transmission methods and apparatus in wireless communication systems, and more particularly to transmission schemes and apparatus related to sidelinks in wireless communication. Background Technology

[0002] Since LTE (Long Term Evolution), 3GPP (3rd Generation Partner Project) has been developing Sidelink (SL) as a direct communication method between users, and completed the first NR SL (New Radio Sidelink) standard for "5G V2X with NR Sidelink" in Rel-16 (Release-16). In Rel-16, NR SL is mainly designed for V2X (Vehicle-to-Everything), but it can also be used for public safety.

[0003] However, due to time constraints, NR SL Rel-16 cannot fully support the service requirements and operating scenarios identified by 3GPP for 5G V2X. Therefore, 3GPP will study enhanced NR SL in Rel-17. Summary of the Invention

[0004] In NR SL systems, VRUs (Vulnerable road users) and PUEs (Pedestrian user equipment) typically have short battery life and low processing complexity. A VRU or PUE needs to locate its Rx-UEs (receiving users) or nearby users to assist in channel awareness and resource allocation. However, when a Tx-UE (transmitting user) receives resources perceived by nearby users and then performs resource scheduling, it causes severe latency issues and incurs significant signaling overhead.

[0005] To address the aforementioned issues, this application discloses a resource allocation method for user assistance, effectively assisting VRU or PUE in performing channel awareness and resource allocation, reducing scheduling latency and signaling interaction overhead. It should be noted that, unless otherwise specified, the embodiments and features in the user equipment of this application can be applied to base stations, and vice versa. Unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined. Furthermore, although this application is initially intended for SL (Single-Leg Link), it can also be used for UL (Uplink). Furthermore, although this application is initially intended for single-carrier communication, it can also be used for multi-carrier communication. Furthermore, although this application is initially intended for single-antenna communication, it can also be used for multi-antenna communication. Furthermore, although this application is initially intended for V2X scenarios, it is also applicable to communication scenarios between terminals and base stations, terminals and relays, and relays and base stations, achieving similar technical effects in V2X scenarios. Furthermore, adopting a unified solution for different scenarios (including but not limited to V2X scenarios and terminal-base station communication scenarios) can help reduce hardware complexity and cost.

[0006] It should be noted that the interpretation of the terminology in this application is based on the definitions in the 3GPP specification protocols TS36, TS37 and TS38 series, but may also refer to the definitions in the IEEE (Institute of Electrical and Electronics Engineers) specification protocols.

[0007] This application discloses a method used in a first node of wireless communication, characterized by comprising:

[0008] Receive the first signaling, which is used to trigger the first channel sensing;

[0009] The first channel sensing is performed, and the first channel sensing is used to determine the first time-frequency resource block;

[0010] Send a second signaling message, which is used to indicate the target identifier and the first time-frequency resource block;

[0011] Wherein, the first signaling indicates a first identifier and a first parameter; the first identifier is used to identify the second node in this application; the first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first parameter is used to perform the first channel sensing; the first identifier is used to determine the target identifier; the second node is the sender of the first signal, and the first time-frequency resource block is reserved for the transmission of the first signal; the second node and the first node are not co-located.

[0012] As an example, the problem this application aims to solve is that when a Tx-UE (transmitting user) receives resources perceived by nearby users and then performs resource scheduling, it causes serious latency problems and brings a large amount of signaling interaction overhead.

[0013] As an example, the method of this application is to enable nearby users to perform channel awareness and resource scheduling.

[0014] As an example, the method of this application is: nearby users simultaneously schedule Tx-UE to transmit signals and Rx-UE to receive signals.

[0015] As an example, the method of this application is to simultaneously establish an association between the second signaling and the sender and receiver of the first signal.

[0016] As an example, the advantage of the above method is that nearby users assist in performing channel awareness and resource allocation, which greatly reduces the transmission delay and signaling interaction overhead caused by inter-user coordination.

[0017] According to one aspect of this application, the method is characterized in that the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block, and the interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

[0018] According to one aspect of this application, the method is characterized in that the second signaling includes a first field, the first field being used to indicate the first time offset value; the reception timing of the second signaling is used to determine the transmission timing of the first signal, and the receiver of the first signal is a node other than the first node.

[0019] According to one aspect of this application, the above method is characterized in that a second identifier is used to identify a third node in this application, the third node being the receiver of the first signal, and the second identifier is used to generate the target identifier.

[0020] According to one aspect of this application, the above method is characterized in that the first signal indicates the target identifier.

[0021] According to one aspect of this application, the above method is characterized in that the first node is a user equipment.

[0022] According to one aspect of this application, the above method is characterized in that the first node is a relay node.

[0023] According to one aspect of this application, the above method is characterized in that the first node is a base station.

[0024] This application discloses a method used in a second node for wireless communication, characterized by comprising:

[0025] Send a third signaling message, which is used to indicate the first identifier and the first parameter;

[0026] Receive a second signaling message, which indicates the target identifier and the first time-frequency resource block;

[0027] Send a first signal on the first time-frequency resource block;

[0028] Wherein, the first identifier is used to identify the second node; the first parameter includes at least one of the following: first resource pool, first priority, first time length, and first frequency domain resource size; the target identifier is related to the first identifier.

[0029] According to one aspect of this application, the method is characterized in that the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block, and the interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

[0030] According to one aspect of this application, the method is characterized in that the second signaling includes a first field, the first field being used to indicate the first time offset value; the reception timing of the second signaling is used to determine the transmission timing of the first signal, and the receiver of the first signal and the sender of the second signaling are not co-located.

[0031] According to one aspect of this application, the above method is characterized in that a second identifier is used to identify a third node in this application, the third node being the receiver of the first signal, and the second identifier is used to generate the target identifier.

[0032] According to one aspect of this application, the above method is characterized in that the first signal is used to indicate the target identifier.

[0033] According to one aspect of this application, the above method is characterized in that the second node is a user equipment.

[0034] According to one aspect of this application, the above method is characterized in that the second node is a relay node.

[0035] According to one aspect of this application, the method described above is characterized in that the second node is a base station.

[0036] This application discloses a method used in a third node for wireless communication, characterized by comprising:

[0037] Receive a second signaling message, which indicates the target identifier and the first time-frequency resource block;

[0038] Receive the first signal on the first time-frequency resource block;

[0039] The target identifier is related to the first identifier; the first identifier is used to identify the sender of the first signal; the sender of the second signaling is not co-located with the sender of the first signal.

[0040] According to one aspect of this application, the method is characterized in that the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block, and the time-domain resources occupied by the second signaling are separated from the time-domain resources occupied by the first time-frequency resource block by a first time offset.

[0041] According to one aspect of this application, the method is characterized in that the second signaling includes a first field, the first field being used to indicate the first time offset value; the reception timing of the second signaling is used to determine the transmission timing of the first signal, and the sender of the first signal and the sender of the second signaling are not co-located.

[0042] According to one aspect of this application, the above method is characterized in that a second identifier is used to identify the third node, and the second identifier is used to generate the target identifier.

[0043] According to one aspect of this application, the above method is characterized in that the first signal indicates the target identifier.

[0044] According to one aspect of this application, the above method is characterized in that the third node is a user equipment.

[0045] According to one aspect of this application, the above method is characterized in that the third node is a relay node.

[0046] According to one aspect of this application, the above method is characterized in that the third node is a base station.

[0047] This application discloses a first node device used for wireless communication, characterized in that it includes:

[0048] The first receiver receives the first signaling, which is used to trigger the first channel sensing.

[0049] The second receiver performs the first channel sensing, which is used to determine the first time-frequency resource block.

[0050] The first transmitter sends a second signaling message, which is used to indicate the target identifier and the first time-frequency resource block;

[0051] Wherein, the first signaling indicates a first identifier and a first parameter; the first identifier is used to identify the second node device in this application; the first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first parameter is used to perform the first channel sensing; the first identifier is used to determine the target identifier; the second node device is the sender of the first signal, and the first time-frequency resource block is reserved for the transmission of the first signal; the second node device and the first node device are not co-located.

[0052] This application discloses a second node device used for wireless communication, characterized in that it includes:

[0053] The second transmitter sends a third signaling message, which is used to indicate the first identifier and the first parameter;

[0054] The third receiver receives the second signaling, which indicates the target identifier and the first time-frequency resource block.

[0055] The third transmitter sends the first signal on the first time-frequency resource block;

[0056] Wherein, the first identifier is used to identify the second node device; the first parameter includes at least one of the following: a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the target identifier is related to the first identifier.

[0057] This application discloses a third-node device used for wireless communication, characterized in that it includes:

[0058] The fourth receiver receives the second signaling, which indicates the target identifier and the first time-frequency resource block;

[0059] The fifth receiver receives the first signal on the first time-frequency resource block;

[0060] The target identifier is related to the first identifier; the first identifier is used to identify the sender of the first signal; the sender of the second signaling is not co-located with the sender of the first signal.

[0061] As an example, this application has the following advantages:

[0062] - The problem this application aims to solve is that when a Tx-UE receives resources perceived by nearby users and then performs resource scheduling, it causes serious latency issues and brings a large amount of signaling interaction overhead;

[0063] This application enables nearby users to perform channel awareness and resource scheduling;

[0064] -In this application, adjacent users simultaneously schedule Tx-UE to transmit signals and Rx-UE to receive signals;

[0065] -This application establishes an association between the second signaling and the sender and receiver of the first signal simultaneously;

[0066] - In this application, neighboring users assist in performing channel awareness and resource allocation, which greatly reduces transmission delay and signaling interaction overhead caused by inter-user coordination. Attached Figure Description

[0067] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0068] Figure 1 A flowchart illustrating the processing of a first node according to an embodiment of this application is shown;

[0069] Figure 2 A schematic diagram of a network architecture according to an embodiment of this application is shown;

[0070] Figure 3 A schematic diagram of a wireless protocol architecture for the user plane and control plane according to an embodiment of this application is shown;

[0071] Figure 4 A schematic diagram of a first communication device and a second communication device according to an embodiment of this application is shown;

[0072] Figure 5 A flowchart illustrating a wireless signal transmission process according to an embodiment of this application is shown;

[0073] Figure 6 A flowchart illustrating a wireless signal transmission process according to an embodiment of this application is shown;

[0074] Figure 7A schematic diagram illustrating the relationship between a first signaling, a second signaling, and a first signal according to an embodiment of this application is shown;

[0075] Figure 8 A schematic diagram illustrating the relationship between a first signaling, a second signaling, a third signaling, and a first signal according to an embodiment of this application is shown.

[0076] Figure 9 A flowchart illustrating a target node performing channel awareness according to an embodiment of this application is shown;

[0077] Figure 10 A structural block diagram of a processing apparatus for a first node according to an embodiment of this application is shown;

[0078] Figure 11 A structural block diagram of a processing apparatus for a second node according to an embodiment of this application is shown;

[0079] Figure 12 A structural block diagram of a processing apparatus for a third node according to an embodiment of this application is shown. Detailed Implementation

[0080] The technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0081] Example 1

[0082] Example 1 illustrates a processing flowchart of the first node of an embodiment of this application, as shown in the attached diagram. Figure 1 As shown. In the appendix Figure 1 In the diagram, each box represents a step.

[0083] In Embodiment 1, the first node in this application first executes step 101, receiving a first signaling, which is used to trigger a first channel sensing; then executes step 102, performing the first channel sensing, which is used to determine a first time-frequency resource block; finally executes step 103, sending a second signaling, which is used to indicate a target identifier and the first time-frequency resource block; the first signaling indicates a first identifier and a first parameter; the first identifier is used to identify the second node; the first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first parameter is used to perform the first channel sensing; the first identifier is used to determine the target identifier; the second node is the sender of a first signal, and the first time-frequency resource block is reserved for the transmission of the first signal; the second node and the first node are not co-located.

[0084] As one embodiment, the first signaling includes one or more fields in a PHY layer (Physical Layer) signaling.

[0085] As an example, the first signaling includes one or more fields in an SCI (Sidelink Control Information).

[0086] As an example, the definition of SCI is referenced in sections 8.3 and 8.4 of 3GPP TS38.212.

[0087] As one embodiment, the first signaling includes one or more fields in a DCI (Downlink Control Information).

[0088] As one embodiment, the first signaling includes all or part of a higher layer signaling.

[0089] As one embodiment, the first signaling includes all or part of an RRC (Radio Resource Control) layer signaling.

[0090] As one embodiment, the first signaling includes all or part of a MAC (Multimedia Access Control) layer signaling.

[0091] As an example, the channel occupied by the first signaling includes PSCCH (Physical Sidelink Control Channel).

[0092] As an example, the channel occupied by the first signaling includes PSSCH (Physical Sidelink Shared Channel).

[0093] As an example, the channel occupied by the first signaling includes PDCCH (Physical Downlink Control Channel).

[0094] As an example, the channel occupied by the first signaling includes PDSCH (Physical Downlink Shared Channel).

[0095] As an example, the first signaling is used to trigger the first node to perform the first channel sensing.

[0096] As one embodiment, the first signaling is used to trigger the first node to send the second signaling.

[0097] As an example, the first signaling is used to trigger the first node to perform the first channel sensing and send the second signaling.

[0098] As an example, after the first node detects the first signaling, it performs the first channel sensing.

[0099] As one example, after the first node detects the first signaling, it sends the second signaling.

[0100] As an example, after the first node detects the first signaling, it performs the first channel sensing and sends the second signaling.

[0101] As an example, in response to detecting the first signaling, the first node performs the first channel sensing.

[0102] As one example, in response to detecting the first signaling, the first node sends the second signaling.

[0103] As an example, in response to detecting the first signaling, the first node performs the first channel sensing and sends the second signaling.

[0104] As an example, the first signaling directly indicates the first identifier and the first parameter.

[0105] As an example, the first signaling indirectly indicates the first identifier and the first parameter.

[0106] As one embodiment, the first signaling directly indicates the first parameter, and the first signaling indirectly indicates the first identifier.

[0107] As one embodiment, the first signaling includes the first identifier.

[0108] As one embodiment, the first signaling includes the first parameter.

[0109] As one embodiment, the first signaling includes the first identifier and the first parameter.

[0110] As one embodiment, the first signaling indicates the first identifier, and the first signaling includes the first parameter.

[0111] As one embodiment, the first identifier is used to scramble the first signaling, which includes the first parameter.

[0112] As an example, the first identifier is used to generate the scrambling sequence of the first signaling.

[0113] As an example, the first identifier is used to determine the Demodulation Reference Signal (DMRS) of the first signaling.

[0114] As one embodiment, the first signaling includes a first control signaling and a first bit block, the first bit block comprising a positive integer number of bits.

[0115] As an example, the first control signaling is used to indicate the first identifier, and the first bit block is used to indicate the first parameter.

[0116] As one embodiment, the first identifier is used to scramble the first control signaling.

[0117] As an example, the first identifier is used to generate the initial scrambling sequence of the first control signaling.

[0118] As one embodiment, the first identifier is used to generate a scrambling sequence for scrambling the first bit block.

[0119] As one embodiment, the first bit block includes the first parameter.

[0120] As one embodiment, the first control signaling is transmitted on the PSCCH, and the first bit block is transmitted on the PSSCH.

[0121] As an example, the first control signaling is transmitted on the PDCCH, and the first bit block is transmitted on the PDSCH.

[0122] As an example, the first control signaling is an SCI.

[0123] As an example, the first control signaling is a DCI.

[0124] As an example, a first bit block is used to generate the first signaling, and the first bit block comprises a positive integer number of bits.

[0125] As one embodiment, the first bit block comprises a positive integer number of bits, and all or some of the positive integer number of bits in the first bit block are used to generate the first signaling.

[0126] As an example, the first bit block includes one CW (Codeword).

[0127] As an example, the first bit block includes one CB (Code Block).

[0128] As an example, the first bit block includes one CBG (Code Block Group).

[0129] As one example, the first bit block includes 1 TB (Transport Block).

[0130] As an example, all or part of the bits of the first bit block are sequentially subjected to transport block-level CRC (Cyclic Redundancy Check) attachment, code block segmentation, code block-level CRC attachment, channel coding, rate matching, code block concatenation, scrambling, modulation, layer mapping, antenna port mapping, mapping to physical resource blocks, baseband signal generation, modulation and upconversion to obtain the first signaling.

[0131] As an example, the first signaling is the output of the first bit block after it has passed through the modulation mapper, layer mapper, precoding, resource element mapper, and multicarrier symbol generation in sequence.

[0132] As an example, the channel coding is based on polar codes.

[0133] As an example, the channel coding is based on LDPC (Low-density Parity-Check) codes.

[0134] As an example, the first identifier is used to identify the second node in this application.

[0135] As an example, the first identifier is used to identify the second node device in this application.

[0136] As one embodiment, the first identifier is used to identify the sender of the first signaling.

[0137] As an example, the first identifier is used to identify the sender of the third signaling in this application.

[0138] As one embodiment, the first identifier is used to identify the sender of the first signal.

[0139] As an example, the first identifier is used to identify a user equipment.

[0140] As an example, the first identifier is used to identify a relay.

[0141] As one example, the first identifier includes a source identifier (Source ID, Source Identity).

[0142] As one embodiment, the first includes a Layer-1 Source ID.

[0143] As an example, the first identifier includes the SL source identity (Sidelink Source Identity).

[0144] As one example, the first identifier includes RNTI (Radio Network Temporary Identifier).

[0145] As one example, the first identifier includes C-RNTI (Cell-Radio Network Temporary Identifier).

[0146] As one embodiment, the first identifier includes TC-RNTI (Temporary Cell-Radio Network Temporary Identifier).

[0147] As one example, the first identifier includes IMSI (International Mobile Subscriber Identifier).

[0148] As an example, the first identifier is a positive integer less than 16777217.

[0149] As an example, the first identifier is 2 to the power of 0.

[0150] As one embodiment, the first identifier includes X0 bits, where X0 is a positive integer.

[0151] As an example, X0 is configurable.

[0152] As an example, X0 equals 16.

[0153] As an example, X0 equals 8.

[0154] As one embodiment, the first parameter includes at least one of the following: a first resource pool, a first priority, a first time length, and a first frequency domain resource size.

[0155] As one example, the first parameter includes a first resource pool.

[0156] As one example, the first parameter includes a first priority.

[0157] As one example, the first parameter includes a first time length.

[0158] As one embodiment, the first parameter includes a first frequency domain resource size.

[0159] As one example, the first parameter includes a first resource pool and a first priority.

[0160] As one embodiment, the first parameter includes a first priority and a first frequency domain resource size.

[0161] As one embodiment, the first parameter includes a first priority, a first time length, and a first frequency domain resource size.

[0162] As one embodiment, the first parameter includes a first resource pool, a first priority, a first time length, and a first frequency domain resource size.

[0163] As an example, the first parameter is used to indicate at least one of the following: the first resource pool, the first priority, the first time length, and the first frequency domain resource size.

[0164] As an example, the first signaling is used to indirectly indicate at least one of the following: the first resource pool, the first priority, the first time length, and the first frequency domain resource size.

[0165] As an example, the first signaling is used to indicate the first resource pool, the first priority, the first time length, and the first frequency domain resource size.

[0166] As one embodiment, the first signaling includes a first resource pool, in which the target node performs channel awareness.

[0167] As one embodiment, the first signaling includes a first resource pool, the first resource pool includes a plurality of time-frequency resource blocks, and the target time-frequency resource block is one of the plurality of time-frequency resource blocks included in the first resource pool.

[0168] As one embodiment, the first resource pool includes all or part of the resources of the secondary link resource pool (SL Resource Pool).

[0169] As an example, any one of the multiple time-frequency resource blocks included in the first resource pool includes multiple REs (Resource Elements).

[0170] As an example, any one of the multiple time-frequency resource blocks included in the first resource pool occupies a positive integer number of multi-carrier symbols (Symbol(s)) in the time domain, and any one of the multiple time-frequency resource blocks included in the first resource pool occupies a positive integer number of subcarriers (Subcarrier(s)) in the frequency domain.

[0171] As an example, any one of the multiple time-frequency resource blocks included in the first resource pool occupies a positive integer number of multi-carrier symbols (Symbol(s)) in the time domain, and any one of the multiple time-frequency resource blocks included in the first resource pool occupies a positive integer number of physical resource blocks (Physical Resource Block(s), PRB(s)) in the frequency domain.

[0172] As an example, any one of the multiple time-frequency resource blocks included in the first resource pool occupies a positive integer number of multi-carrier symbols (Symbol(s)) in the time domain, and any one of the multiple time-frequency resource blocks included in the first resource pool occupies a positive integer number of subchannels (Subchannel(s)) in the frequency domain.

[0173] As an example, any one of the multiple time-frequency resource blocks included in the first resource pool occupies a positive integer number of time slots (Slot(s)) in the time domain, and any one of the multiple time-frequency resource blocks included in the first resource pool occupies a positive integer number of subchannels (Subchannel(s)) in the frequency domain.

[0174] As one embodiment, the first signaling includes a first priority, which is associated with the first signal.

[0175] As an example, the first priority is a positive integer.

[0176] As an example, the first priority is one of P positive integers, where P is a positive integer.

[0177] As an example, the first priority is a positive integer from 1 to P.

[0178] As an example, P equals 8.

[0179] As an example, P equals 9.

[0180] As an example, the first priority is the Layer 1 (L1) priority.

[0181] As one example, the first priority is used for transmitting the first signal.

[0182] As one example, the first priority is configured by higher-layer signaling.

[0183] As one embodiment, the first signal includes a first target bit block, and the first priority is the priority of the first target bit block.

[0184] As an example, the first time length is related to the Remaining PacketDelay Budget.

[0185] As an example, the first time length is linearly related to the remaining packet delay budget.

[0186] As an example, the first time length is calculated based on the remaining packet delay budget.

[0187] As an example, the time at which the remaining packet delay budget is subtracted from the first time length is no later than the time of transmission of the first signaling.

[0188] As an example, the remaining packet delay budget minus the first time length in the time slot is no later than the time slot in which the first signaling is transmitted.

[0189] As an example, the time at which the remaining packet delay budget is subtracted from the first time length is no later than the transmission time of the third signaling in this application.

[0190] As an example, the remaining packet delay budget minus the first time length of the time slot is no later than the time slot in which the third signaling in this application is transmitted.

[0191] As an example, the time interval between the remaining packet delay budget and the moment when the first signaling is sent is equal to the first time length.

[0192] As an example, the time interval between the remaining packet delay budget and the time slot in which the first signaling is transmitted is equal to the first time length.

[0193] As an example, the time interval between the remaining packet delay budget and the moment when the first signaling is sent is greater than the first time length.

[0194] As an example, the time interval between the remaining packet delay budget and the time slot in which the first signaling is transmitted is greater than the first time length.

[0195] As an example, the time at which the remaining packet delay budget is subtracted from the first time length is no later than the time when the second signaling is sent.

[0196] As an example, the remaining packet delay budget minus the first time length of the time slot is no later than the time slot in which the second signaling is transmitted.

[0197] As an example, the time interval between the remaining packet delay budget and the moment when the second signaling is sent is equal to the first time length.

[0198] As an example, the time interval between the remaining packet delay budget and the time slot in which the second signaling is transmitted is equal to the first time length.

[0199] As an example, the time interval between the remaining packet delay budget and the moment when the second signaling is sent is greater than the first time length.

[0200] As an example, the time interval between the remaining packet delay budget and the time slot in which the second signaling is transmitted is greater than the first time length.

[0201] As one embodiment, the first time length includes a positive integer number of time slots.

[0202] As one embodiment, the first time length includes a positive integer number of multicarrier symbols.

[0203] As an example, the first time length includes an integer multiple of 0.5 milliseconds.

[0204] As an example, the remaining packet delay budget is associated with the first target bit block.

[0205] As an example, the first target bit block is expected to be sent before the remaining packet delay budget.

[0206] As an example, the first signal is expected to be sent before the remaining packet delay budget.

[0207] As an example, the unit of the remaining packet delay budget is milliseconds.

[0208] As an example, the granularity of the remaining packet delay budget is 0.5 milliseconds.

[0209] As an example, the second node in this application monitors the second signaling within the first monitoring window.

[0210] As an example, the sender of the first signaling monitors the second signaling within a first monitoring window.

[0211] As an example, the sender of the third signaling in this application monitors the second signaling within the first monitoring window.

[0212] As an example, the start time of the first monitoring window is the time when the first signaling is sent.

[0213] As an example, the start time of the first monitoring window is the time slot in which the first signaling is sent.

[0214] As an example, the start time of the first monitoring window is the sum of the transmission time of the first signaling and the second time offset value.

[0215] As an example, the start time of the first monitoring window is the time after the first signaling is sent, offset by a second time offset value.

[0216] As an example, the start time of the first monitoring window is later in the time domain than the transmission time of the first signaling.

[0217] As an example, the start time of the first monitoring window is the sum of the time slot in which the first signaling is sent and the second time offset value.

[0218] As an example, the start time of the first monitoring window is later in the time domain than the time slot in which the first signaling is sent.

[0219] As one example, the second time offset value includes a positive integer number of time slots.

[0220] As one embodiment, the second time offset value includes a positive integer number of multicarrier symbols.

[0221] As an example, the second time offset value is configured.

[0222] As an example, the second time offset value is fixed.

[0223] As an example, the length of the first monitoring window is equal to the length of the first time.

[0224] As an example, the length of the first monitoring window is less than the length of the first time.

[0225] As an example, the size of the first frequency domain resource is not less than the size of the frequency domain resource occupied by the first time-frequency resource block.

[0226] As an example, the size of the first frequency domain resource is not less than the number of sub-channels occupied by the first time-frequency resource block.

[0227] As an example, the size of the first frequency domain resource is equal to the size of the frequency domain resources occupied by the first time-frequency resource block.

[0228] As an example, the size of the first frequency domain resource is equal to the number of sub-channels occupied by the first time-frequency resource block.

[0229] As an example, the size of the first frequency domain resource is equal to the number of physical resource blocks occupied by the first time-frequency resource block.

[0230] As an example, the first frequency domain resource size is equal to the number of subcarriers occupied by the first time-frequency resource block.

[0231] As one embodiment, the second signaling includes one or more fields in a PHY layer signaling.

[0232] As one example, the second signaling includes one or more fields in an SCI.

[0233] As one embodiment, the second signaling includes one or more fields in the first-stage SCI format.

[0234] As an example, the first-level SCI format includes SCI format 1-A.

[0235] As an example, the definition of SCI format 1-A is referenced in section 8.3 of 3GPP TS38.212.

[0236] As one embodiment, the second signaling includes all or part of a higher-level signaling.

[0237] As one embodiment, the second signaling includes all or part of an RRC layer signaling.

[0238] As one embodiment, the second signaling includes all or part of a MAC layer signaling.

[0239] As one example, the channel occupied by the second signaling includes PSCCH.

[0240] As one example, the channel occupied by the second signaling includes PSSCH.

[0241] As an example, the second signaling directly indicates the target identifier and the first time-frequency resource block.

[0242] As an example, the second signaling indirectly indicates the target identifier and the first time-frequency resource block.

[0243] As one embodiment, the second signaling directly indicates the first time-frequency resource block, and the second signaling indirectly indicates the target identifier.

[0244] As one embodiment, the second signaling includes the target identifier.

[0245] As one embodiment, the second signaling includes the first time-frequency resource block.

[0246] As one embodiment, the second signaling includes the time-domain resources occupied by the first time-frequency resource block.

[0247] As one embodiment, the second signaling includes the frequency domain resources occupied by the first time-frequency resource block.

[0248] As one embodiment, the second signaling includes the target identifier and the first time-frequency resource block.

[0249] As one embodiment, the second signaling indicates the target identifier, and the second signaling includes the first time-frequency resource block.

[0250] As one embodiment, the target identifier is used to scramble the second signaling, which includes the first time-frequency resource block.

[0251] As an example, the target identifier is used to generate the scrambling sequence of the second signaling.

[0252] As one embodiment, the target identifier is used to generate a scrambling sequence for scrambling the second signaling.

[0253] As one example, the target identifier is used to generate an initial sequence for scrambling the second signaling.

[0254] As one embodiment, the target identifier is used to determine the problem-solving reference signal of the second signaling.

[0255] As one embodiment, the second signaling includes a positive integer number of fields, and the target identifier is one of the positive integer number of fields included in the second signaling.

[0256] As one embodiment, the second signaling includes a positive integer number of fields, and the first time-frequency resource block is one of the positive integer number of fields included in the second signaling.

[0257] As one embodiment, the second signaling includes a positive integer number of fields, the time domain resources occupied by the first time-frequency resource block are one of the positive integer number of fields included in the second signaling, and the frequency domain resources occupied by the first time-frequency resource block are one of the positive integer number of fields included in the second signaling.

[0258] As one embodiment, the second signaling includes a second bit block, which includes a positive integer number of bits.

[0259] As an example, a second bit block is used to generate the second signaling, and the second bit block comprises a positive integer number of bits.

[0260] As one embodiment, the second bit block comprises a positive integer number of bits, and all or some of the positive integer number of bits comprised in the second bit block are used to generate the second signaling.

[0261] As one embodiment, the second bit block includes the target identifier.

[0262] As one embodiment, the second bit block includes the first time-frequency resource block.

[0263] As one embodiment, the second bit block includes the time-domain resources occupied by the first time-frequency resource block.

[0264] As one embodiment, the second bit block includes the frequency domain resources occupied by the first time-frequency resource block.

[0265] As an example, the second signaling is the output of the second bit block after it has passed through CRC attachment, channel coding, rate matching, modulation mapper, layer mapper, precoding, resource particle mapper, and multicarrier symbol generation.

[0266] As one embodiment, the second bit block sequentially undergoes CRC attachment, channel coding, rate matching, scrambling, modulation, layer mapping, antenna port mapping, mapping to physical resource blocks, baseband signal generation, modulation, and up-conversion to obtain the first signal.

[0267] As one embodiment, the first time-frequency resource block includes a plurality of REs.

[0268] As one embodiment, the first time-frequency resource block occupies a positive integer number of multicarrier symbols in the time domain and a positive integer number of subcarriers in the frequency domain.

[0269] As one embodiment, the first time-frequency resource block occupies a positive integer number of multicarrier symbols in the time domain and a positive integer number of physical resource blocks in the frequency domain.

[0270] As one embodiment, the first time-frequency resource block occupies a positive integer number of multicarrier symbols in the time domain and a positive integer number of sub-channels in the frequency domain.

[0271] As an example, the first time-frequency resource block occupies a positive integer number of time slots in the time domain, and any one of the first time-frequency resource blocks occupies a positive integer number of sub-channels in the frequency domain.

[0272] As one embodiment, the first resource pool includes the first time-frequency resource block.

[0273] As an example, the first time-frequency resource block is one of the multiple time-frequency resource blocks included in the first resource pool.

[0274] As an example, the first time-frequency resource block is pointed out from the first resource pool.

[0275] As one embodiment, the first time-frequency resource block is randomly selected from the plurality of time-frequency resource blocks included in the first resource pool.

[0276] As an example, the first time-frequency resource block is autonomously selected by the first node from the plurality of time-frequency resource blocks included in the first resource pool.

[0277] As an example, the first time-frequency resource block is one of the plurality of time-frequency resource blocks in the first resource pool indicated by the second signaling.

[0278] As one embodiment, the first time-frequency resource block includes PSCCH.

[0279] As one embodiment, the first time-frequency resource block includes PSSCH.

[0280] As an example, the first time-frequency resource block includes PSCCH and PSSCH.

[0281] As an example, the first time-frequency resource block is reserved for the transmission of the first signal.

[0282] As an example, the first signal is transmitted on the first time-frequency resource block.

[0283] As an example, the first time-frequency resource block is the time-frequency resource block occupied by the first signal.

[0284] As an example, the first time-frequency resource block is later in the time domain than the transmission time of the second signaling.

[0285] As an example, in response to receiving the second signaling, the second node in this application sends the first signal on the first time-frequency resource block.

[0286] As an example, the second node in this application transmits the first signal on the first time-frequency resource block, and the third node in this application receives the first signal on the first time-frequency resource block.

[0287] As an example, the target identifier is not used to identify the first node.

[0288] As an example, the node indicated by the target identifier is different from the first node.

[0289] As an example, the node identified by the target identifier is not co-located with the first node.

[0290] As an example, the node indicated by the target identifier is a different communication node from the first node.

[0291] As an example, the node indicated by the target identifier is a different user equipment from the first node.

[0292] As an example, the backhaul link between the node indicated by the target identifier and the first node is non-ideal (i.e., the latency cannot be ignored).

[0293] As an example, the node indicated by the target identifier does not share the same baseband device as the first node.

[0294] As an example, the baseband device of the node indicated by the target identifier is different from the baseband device of the first node.

[0295] As one example, the target identifier includes the source identifier.

[0296] As an example, the target identifier includes a layer 1 source identifier.

[0297] As an example, the target identifier includes the SL source identifier.

[0298] As one embodiment, the target identifier is used to identify the sender of the first signal.

[0299] As an example, the target identifier is used to indicate the sender of the first signal.

[0300] As an example, the target identifier includes a destination identifier (Destination ID, DestinationIdentity).

[0301] As one example, the target identifier includes a Layer-1 Destination ID.

[0302] As an example, the target identifier includes the SL destination identifier.

[0303] As one embodiment, the target identifier is used to identify the receiver of the first signal.

[0304] As one embodiment, the target identifier is used to indicate the receiver of the first signal.

[0305] As one embodiment, the target identifier is used to indicate a target recipient of the second signaling.

[0306] As one example, the target identifier includes a source identifier and a destination identifier.

[0307] As an example, the target identifier includes a layer 1 source identifier and a layer 1 destination identifier.

[0308] As one embodiment, the target identifier includes a first sub-identifier and a second sub-identifier.

[0309] As an example, the first sub-identifier in the target identifier is the source identifier, and the second sub-identifier in the target identifier is the destination identifier.

[0310] As an example, the first sub-identifier in the target identifier is the destination identifier, and the second sub-identifier in the target identifier is the destination identifier.

[0311] As an example, the first sub-identifier in the target identifier is used to identify the sender of the first signal, and the second sub-identifier in the target identifier is used to identify the receiver of the first signal.

[0312] As an example, the first sub-identifier in the target identifier is used to indicate the sender of the first signal, and the second sub-identifier in the target identifier is used to indicate the receiver of the first signal.

[0313] As an example, the first sub-identifier in the target identifier is used to identify the second node in this application, and the second sub-identifier in the target identifier is used to identify the third node in this application.

[0314] As an example, the first sub-identifier in the target identifier is used to indicate the second node in this application, and the second sub-identifier in the target identifier is used to indicate the third node in this application.

[0315] As an example, the first sub-identifier and the second sub-identifier in the target identifier are used to identify the target recipients of the two second signaling messages, respectively.

[0316] As an example, the target identifier includes RNTI.

[0317] As an example, the target identifier includes C-RNTI.

[0318] As one example, the target identifier includes TC-RNTI.

[0319] As an example, the target identifier includes IMSI.

[0320] As an example, the target identifier is a positive integer less than 16777217.

[0321] As an example, the target identifier is 2 to the power of X.

[0322] As an example, the target identifier comprises X bits, where X is a positive integer.

[0323] As an example, X is configurable.

[0324] As an example, X equals 16.

[0325] As an example, X equals 8.

[0326] As an example, the first sub-identifier in the target identifier includes X1 bits, and the second sub-identifier in the target identifier includes X2 bits, where X1 and X2 are both positive integers.

[0327] As an example, X1 equals 8.

[0328] As an example, X1 equals 16.

[0329] As an example, X2 equals 16.

[0330] As an example, the target identifier is related to the first identifier.

[0331] As an example, the first identifier is used to determine the target identifier.

[0332] As one embodiment, the target identifier includes the first identifier.

[0333] As an example, the target identifier is the same as the first identifier.

[0334] As an example, the first identifier is the first sub-identifier in the target identifier.

[0335] As an example, the node indicated by the target identifier is co-located with the node indicated by the first identifier.

[0336] As an example, the node indicated by the target identifier and the node indicated by the first identifier are both second nodes in this application.

[0337] As an example, the backhaul link between the node indicated by the target identifier and the node indicated by the first identifier is ideal (i.e., the delay can be ignored).

[0338] As one embodiment, the node indicated by the target identifier shares the same baseband device as the node indicated by the first identifier.

[0339] As an example, both the target identifier and the first identifier are used to indicate the same node.

[0340] As an example, the target identifier and the first identifier are both used for the same user equipment.

[0341] As an example, both the target identifier and the first identifier are used to indicate the second node in this application.

[0342] As an example, both the target identifier and the first identifier are used to indicate the sender of the first signal.

[0343] As an example, the target identifier and the first identifier are both used to indicate the same node, where the first identifier is the source identifier of the node and the target identifier is the destination identifier of the node.

[0344] As an example, both the target identifier and the first identifier are used to indicate the second node in this application, wherein the first identifier is the source identifier of the second node and the target identifier is the destination identifier of the second node.

[0345] As an example, both the target identifier and the first identifier are used to indicate the second node in this application, wherein the first identifier is the source identifier of the second node and the target identifier is the C-RNTI of the second node.

[0346] As an example, the first sub-identifier and the first identifier in the target identifier are both used to indicate the second node in this application, where the first identifier is the source identifier of the second node and the first sub-identifier is the destination identifier of the second node.

[0347] As an example, the first sub-identifier and the first identifier in the target identifier are both used to indicate the second node in this application, the first identifier is the source identifier of the second node, and the first sub-identifier is the C-RNTI of the second node.

[0348] As one embodiment, the target identifier is the sum of the deviation values ​​between the first identifier and the first identifier.

[0349] As one embodiment, the target identifier is the difference between the first identifier and the first identifier deviation value.

[0350] As an example, the first identification deviation value is a positive integer.

[0351] As one embodiment, the first signal includes a baseband signal.

[0352] As one embodiment, the first signal includes a radio frequency signal.

[0353] As one embodiment, the first signal includes a wireless signal.

[0354] As an example, the first signal is transmitted on the PSCCH.

[0355] As an example, the first signal is transmitted on the PSSCH.

[0356] As an example, the first signal is transmitted on PSCCH and PSSCH.

[0357] As one embodiment, the first signal includes all or part of a higher-level signaling.

[0358] As one embodiment, the first signal includes all or part of an RRC layer signaling.

[0359] As one embodiment, the first signal includes all or part of a MAC layer signaling.

[0360] As one embodiment, the first signal includes one or more fields in a PHY layer signaling.

[0361] As an example, the first signal includes an SCI.

[0362] As one embodiment, the first signal includes a first target signaling.

[0363] As one embodiment, the first target signaling includes a positive integer number of bits.

[0364] As one embodiment, the first target signaling includes a positive integer number of fields.

[0365] As an example, the first target signaling includes an SCI.

[0366] As one embodiment, the second signaling includes a first-stage SCI format, and the first signal includes a second-stage SCI (2nd-stage SCI) format.

[0367] As one embodiment, the second signaling includes a first-level SCI format, and the first target signaling in the first signal includes a second-level SCI format.

[0368] As an example, the second-level SCI format includes SCI format 2-A.

[0369] As an example, the second-level SCI format includes SCI format 2-B.

[0370] As an example, the definition of SCI format 2-A is referenced in section 8.4 of 3GPP TS38.212.

[0371] As an example, the definition of SCI format 2-B is referenced in section 8.4 of 3GPP TS38.212.

[0372] As one embodiment, the first signal includes a first target bit block, which includes a positive integer number of bits.

[0373] As one embodiment, the first signal includes the first target signaling and the first target bit block.

[0374] As an example, the first target signaling in the first signal is transmitted on the PSCCH, and the first target bit block in the first signal is transmitted on the PSSCH.

[0375] As an example, a first target bit block is used to generate the first signal, and the first target bit block includes a positive integer number of bits.

[0376] As one embodiment, the first target bit block includes a positive integer number of bits, and all or some of the positive integer number of bits included in the first target bit block are used to generate the target signal.

[0377] As an example, the first target bit block includes one CW.

[0378] As an example, the first target bit block includes one CB.

[0379] As an example, the first target bit block includes one CBG.

[0380] As an example, the first target bit block comprises 1 TB.

[0381] As one embodiment, all or part of the bits of the first target bit block are sequentially subjected to transport block-level CRC attachment, coding block segmentation, coding block-level CRC attachment, channel coding, rate matching, coding block concatenation, scrambling, modulation, layer mapping, antenna port mapping, mapping to physical resource block, baseband signal generation, modulation and up-conversion to obtain the first signal.

[0382] As an example, the first signal is the output of the first target bit block after it has passed through the modulation mapper, layer mapper, precoding, resource particle mapper, and multicarrier symbol generation in sequence.

[0383] As an example, the first signal directly indicates the target identifier.

[0384] As an example, the first signal indirectly indicates the target identifier.

[0385] As an example, the first signal indicates the first sub-identifier and the second sub-identifier in the target identifier.

[0386] As one embodiment, the first signal directly indicates the second sub-identifier in the target identifier, and the first signal indirectly indicates the first sub-identifier in the target identifier.

[0387] As one embodiment, the first signal includes the first sub-identifier in the target identifier.

[0388] As one embodiment, the first signal includes the second sub-identifier in the target identifier.

[0389] As one embodiment, the first signal includes the first sub-identifier and the second sub-identifier in the target identifier.

[0390] As an example, the first sub-identifier in the target identifier is used to scramble the first signal, and the first signal includes the second sub-identifier in the target identifier.

[0391] As an example, the first sub-identifier in the target identifier is used to generate the scrambling sequence of the first signal.

[0392] As an example, the first sub-identifier in the target identifier is used to determine the problem-solving reference signal of the first signal.

[0393] As an example, the first target signaling in the first signal is used to indicate the first sub-identifier in the target identifier, and the first target bit block in the first signal is used to indicate the second sub-identifier in the target identifier.

[0394] As an example, the first target signaling in the first signal is used to indicate the first sub-identifier and the second sub-identifier in the target identifier.

[0395] As an example, the first target signaling in the first signal is used to indicate the first sub-identifier and the second sub-identifier in the target identifier, and the first target bit block in the first signal is used to indicate the first sub-identifier in the target identifier.

[0396] As an example, the multi-carrier symbol in this application is an SC-FDMA (Single-Carrier Frequency Division Multiple Access) symbol.

[0397] As an example, the multicarrier symbol in this application is a DFT-S-OFDM (Discrete Fourier Transform Spread Orthogonal Frequency Division Multiplexing) symbol.

[0398] As an example, the multi-carrier symbol in this application is an FDMA (Frequency Division Multiple Access) symbol.

[0399] As an example, the multi-carrier symbol in this application is the FBMC (Filter Bank Multi-Carrier) symbol.

[0400] As an example, the multicarrier symbol in this application is an IFDMA (Interleaved Frequency Division Multiple Access) symbol.

[0401] Example 2

[0402] Example 2 illustrates a schematic diagram of a network architecture according to this application, as shown in the attached diagram. Figure 2 As shown. (Attached) Figure 2This diagram illustrates the network architecture 200 of 5G NR, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) systems. The 5G NR or LTE network architecture 200 may be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable term. 5GS / EPS 200 may include one or more UEs (User Equipment) 201, a UE 241 communicating with UE 201 via a sidelink, NG-RAN (Next Generation Radio Access Network) 202, 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. 5GS / EPS can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown in the figure, 5GS / EPS provides packet-switched services; however, those skilled in the art will readily understand that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol termination to UE 201. gNB 203 can connect to other gNBs 204 via an Xn interface (e.g., backhaul). gNB 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, Basic Services Set (BSS), Extended Services Set (ESS), TRP (Transmitter Receiver Node), or some other suitable term. In NTN networks, instances of gNB 203 include satellites, aircraft, or ground base stations relayed via satellite. gNB 203 provides UE 201 with an access point to 5GC / EPC 210. Examples of UE201 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband IoT devices, machine-type communication devices, land vehicles, automobiles, wearable devices, or any other similar functional devices.Those skilled in the art may also refer to UE201 as a mobile station, subscriber station, mobile unit, subscriber unit, radio unit, remote unit, mobile device, radio device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, radio terminal, remote terminal, handheld device, user agent, mobile client, client, or any other suitable term. gNB203 connects to 5GC / EPC210 via the S1 / NG interface. 5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF 213. The MME / AMF / SMF211 is the control node that handles signaling between UE201 and 5GC / EPC210. ​​Essentially, the MME / AMF / SMF211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through the S-GW / UPF212, which is itself connected to the P-GW / UPF213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF213 is connected to Internet service 230. Internet service 230 includes operator-compliant Internet Protocol services, specifically including the Internet, intranet, IMS (IP Multimedia Subsystem), and packet-switched streaming services.

[0403] As an example, the first node in this application includes the UE201.

[0404] As an example, the second node in this application includes the UE241.

[0405] As an example, the third node in this application includes the UE241.

[0406] As an example, the user equipment in this application includes the UE201.

[0407] As an example, the user equipment in this application includes the UE241.

[0408] As an example, the base station equipment in this application includes the gNB203.

[0409] As an example, the sender of the first signaling in this application includes the UE241.

[0410] As an example, the sender of the first signaling in this application includes the gNB203.

[0411] As an example, the recipient of the first signaling in this application includes the UE201.

[0412] As an example, the sender of the second signaling in this application includes the UE201.

[0413] As an example, the recipient of the second signaling in this application includes the UE241.

[0414] As an example, the sender of the third signaling in this application includes the UE241.

[0415] As an example, the recipient of the third signaling in this application includes the gNB203.

[0416] As an example, the sender of the first signal in this application includes the UE241.

[0417] As an example, the receiver of the first signal in this application includes the UE241.

[0418] Example 3

[0419] Example 3 illustrates a schematic diagram of an embodiment of a wireless protocol architecture for a user plane and a control plane according to this application, as shown in the attached diagram. Figure 3 As shown. Figure 3 This is a schematic diagram illustrating an embodiment of a radio protocol architecture for the user plane 350 and the control plane 300. Figure 3The radio protocol architecture for the control plane 300 between the first node device (UE or RSU in V2X, onboard equipment or onboard communication module) and the second node device (gNB, UE or RSU in V2X, onboard equipment or onboard communication module), or between two UEs, is illustrated using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical Layer) signal processing functions. L1 layer will be referred to herein as PHY301. Layer 2 (L2 layer) 305 sits above PHY301 and is responsible for the link between the first node device and the second node device, as well as between the two UEs, through PHY301. L2 layer 305 includes the MAC (Medium Access Control) sublayer 302, the RLC (Radio Link Control) sublayer 303, and the PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second node device. PDCP sublayer 304 provides data encryption and integrity protection, and also supports cross-regional movement from the first node device to the second node device. RLC sublayer 303 provides packet segmentation and reassembly, implements retransmission of lost packets via ARQ, and also provides duplicate packet detection and protocol error detection. MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channels. MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell among the first node devices. MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3) of the control plane 300 is responsible for acquiring radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the second node device and the first node device. The radio protocol architecture of user plane 350 includes Layer 1 (L1 layer) and Layer 2 (L2 layer). The radio protocol architecture for the first and second node devices in user plane 350 is largely the same as the corresponding layers and sublayers in control plane 300 for Physical Layer 351, PDCP sublayer 354 in L2 layer 355, RLC sublayer 353 in L2 layer 355, and MAC sublayer 352 in L2 layer 355. However, PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. L2 layer 355 in user plane 350 also includes SDAP (Service Data Adaptation Protocol) sublayer 356. SDAP sublayer 356 is responsible for mapping between QoS streams and Data Radio Bearers (DRBs) to support service diversity.Although not illustrated, the first node device may have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) terminating at the P-GW on the network side and an application layer terminating at the other end of the connection (e.g., remote UE, server, etc.).

[0420] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the first node in this application.

[0421] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the second node in this application.

[0422] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the third node described in this application.

[0423] As an example, the first signaling in this application is generated in the PHY301.

[0424] As an example, the first signaling in this application is generated in the MAC sublayer 302.

[0425] As an example, the first signaling in this application is generated in the RRC sublayer 306.

[0426] As an example, the first signaling in this application is transmitted to the PHY301 via the MAC sublayer 302.

[0427] As an example, the second signaling in this application is generated in the PHY301.

[0428] As an example, the second signaling in this application is generated in the MAC sublayer 302.

[0429] As an example, the second signaling in this application is transmitted to the PHY301 via the MAC sublayer 302.

[0430] As an example, the third signaling in this application is generated in the RRC sublayer 306.

[0431] As an example, the third signaling in this application is transmitted to the PHY301 via the MAC sublayer 302.

[0432] As an example, the first signal in this application is generated in the PHY301.

[0433] As an example, the first signal in this application is generated in the MAC sublayer 302.

[0434] As an example, the first signal in this application is generated in the RRC sublayer 306.

[0435] As an example, the first signal in this application is transmitted to the PHY301 via the MAC sublayer 302.

[0436] Example 4

[0437] Example 4 shows schematic diagrams of a first communication device and a second communication device according to this application, as shown in the appendix. Figure 4 As shown. Figure 4 This is a block diagram of a first communication device 410 and a second communication device 450 communicating with each other in an access network.

[0438] The first communication device 410 includes a controller / processor 475, a memory 476, a receiver processor 470, a transmitter processor 416, a multi-antenna receiver processor 472, a multi-antenna transmitter processor 471, a transmitter / receiver 418, and an antenna 420.

[0439] The second communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmitting processor 468, a receiving processor 456, a multi-antenna transmitting processor 457, a multi-antenna receiving processor 458, a transmitter / receiver 454, and an antenna 452.

[0440] In the transmission from the first communication device 410 to the second communication device 450, at the first communication device 410, upper-layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements L2 layer functionality. In the transmission from the first communication device 410 to the second communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the second communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmitting lost packets and signaling to the second communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). Transmit processor 416 performs encoding and interleaving to facilitate forward error correction (FEC) at the second communication device 450, and mapping of signal clusters based on various modulation schemes (e.g., Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-Phase Shift Keying (M-PSK), M-QAM). Multi-antenna transmit processor 471 performs digital spatial precoding on the encoded and modulated symbols, including codebook-based and non-codebook-based precoding, and beamforming processing, generating one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domains, and subsequently uses inverse fast Fourier transform (IFFT) to generate a physical channel carrying the time-domain multicarrier symbol stream. Multi-antenna transmit processor 471 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmitter processor 471 into an radio frequency stream, which is then provided to different antennas 420.

[0441] In the transmission from the first communication device 410 to the second communication device 450, at the second communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream, which is then provided to the receiver processor 456. The receiver processor 456 and the multi-antenna receiver processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiver processor 458 performs receive analog precoding / beamforming operations on the baseband multicarrier symbol stream from the receiver 454. The receiver processor 456 uses a Fast Fourier Transform (FFT) to convert the baseband multicarrier symbol stream after the receive analog precoding / beamforming operations from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiver processor 456, where the reference signal is used for channel estimation, and the data signal is recovered in the multi-antenna receiver processor 458 after multi-antenna detection to recover any spatial stream destined for the second communication device 450. Symbols on each spatial stream are demodulated and recovered in the receive processor 456, generating soft decisions. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper-layer data and control signals transmitted by the first communication device 410 over the physical channel. The upper-layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of Layer 2. The controller / processor 459 may be associated with a memory 460 storing program code and data. The memory 460 may be referred to as computer-readable media. In the transmission from the first communication device 410 to the second communication device 450, the controller / processor 459 provides multiplexing, packet reassembly, decryption, header decompression, and control signal processing between the transport and logical channels to recover upper-layer data packets from the core network. The upper-layer data packets are then provided to all protocol layers above Layer 2. Various control signals may also be provided to Layer 3 for Layer 3 processing.

[0442] In the transmission from the second communication device 450 to the first communication device 410, at the second communication device 450, a data source 467 is used to provide upper-layer data packets to the controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functions at the first communication device 410 described in the transmission from the first communication device 410 to the second communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, implementing L2 layer functions for the user plane and control plane. The controller / processor 459 is also responsible for retransmitting lost packets and signaling to the first communication device 410. Transmit processor 468 performs modulation mapping and channel coding processing, while multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming processing. Subsequently, transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding / beamforming operations in multi-antenna transmit processor 457, the stream is provided to different antennas 452 via transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by multi-antenna transmit processor 457 into a radio frequency symbol stream before providing it to antenna 452.

[0443] In the transmission from the second communication device 450 to the first communication device 410, the function at the first communication device 410 is similar to the receiving function at the second communication device 450 described in the transmission from the first communication device 410 to the second communication device 450. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals into baseband signals, and provides the baseband signals to the multi-antenna receiving processor 472 and the receiving processor 470. The receiving processor 470 and the multi-antenna receiving processor 472 jointly implement the L1 layer functions. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 may be associated with a memory 476 that stores program code and data. The memory 476 may be referred to as computer-readable media. In the transmission from the second communication device 450 to the first communication device 410, the controller / processor 475 provides multiplexing between the transmission and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover upper-layer data packets from the UE 450. Upper-layer packets from the controller / processor 475 can be provided to the core network.

[0444] As an example, the first node in this application includes the second communication device 450, the second node in this application includes the first communication device 410, and the third node in this application includes the first communication device 410.

[0445] As a sub-implementation of the above embodiments, the first node is a user equipment, the second node is a user equipment, and the third node is a user equipment.

[0446] As a sub-implementation of the above embodiments, the first node is a relay node, the second node is a user equipment, and the third node is a user equipment.

[0447] As a sub-implementation of the above embodiments, the first node is a relay node, the second node is a relay node, and the third node is a user equipment.

[0448] As a sub-implementation of the above embodiments, the first node is a user equipment, the second node is a relay node, and the third node is a user equipment.

[0449] As a sub-implementation of the above embodiments, the first node is a base station, the second node is a user equipment, and the third node is a user equipment.

[0450] As a sub-implementation of the above embodiments, the second communication device 450 includes: at least one controller / processor; the at least one controller / processor is responsible for HARQ operation.

[0451] As a sub-implementation of the above embodiments, the first communication device 410 includes: at least one controller / processor; the at least one controller / processor is responsible for HARQ operation.

[0452] As a sub-implementation of the above embodiments, the first communication device 410 includes: at least one controller / processor; the at least one controller / processor is responsible for error detection using positive acknowledgment (ACK) and / or negative acknowledgment (NACK) protocols to support HARQ operation.

[0453] As one embodiment, the second communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The second communication device 450 includes at least: receiving a first signaling, the first signaling being used to trigger a first channel sensing; performing the first channel sensing, the first channel sensing being used to determine a first time-frequency resource block; sending a second signaling, the second signaling being used to indicate a target identifier and the first time-frequency resource block; the first signaling indicating a first identifier and a first parameter; the first identifier being used to identify a second node in this application; the first parameter including at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first parameter being used to perform the first channel sensing; the first identifier being used to determine the target identifier; the second node being a sender of a first signal, the first time-frequency resource block being reserved for the transmission of the first signal; the second node and the first node being non-co-located.

[0454] As one embodiment, the second communication device 450 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: receiving a first signaling signal used to trigger a first channel sensing; performing the first channel sensing signal used to determine a first time-frequency resource block; sending a second signaling signal used to indicate a target identifier and the first time-frequency resource block; the first signaling signal indicating a first identifier and a first parameter; the first identifier used to identify a second node in this application; the first parameter including at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first parameter used to perform the first channel sensing; the first identifier used to determine the target identifier; the second node being a sender of a first signal, and the first time-frequency resource block being reserved for the transmission of the first signal; the second node and the first node being non-co-located.

[0455] As one embodiment, the first communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The first communication device 410 includes at least: transmitting third signaling, the third signaling being used to indicate a first identifier and a first parameter; receiving second signaling, the second signaling indicating a target identifier and a first time-frequency resource block; transmitting a first signal on the first time-frequency resource block; the first identifier being used to identify the second node; the first parameter including at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the target identifier being related to the first identifier.

[0456] As one embodiment, the first communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: sending a third signaling signal used to indicate a first identifier and a first parameter; receiving a second signaling signal indicating a target identifier and a first time-frequency resource block; sending a first signal on the first time-frequency resource block; the first identifier being used to identify the second node; the first parameter including at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; and the target identifier being related to the first identifier.

[0457] As one embodiment, the first communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor. The first communication device 410 includes at least: receiving second signaling, the second signaling indicating a target identifier and a first time-frequency resource block; receiving a first signal on the first time-frequency resource block; the target identifier being related to a first identifier; the first identifier being used to identify the sender of the first signal; and the sender of the second signaling being non-co-located with the sender of the first signal.

[0458] As one embodiment, the first communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: receiving a second signaling that indicates a target identifier and a first time-frequency resource block; receiving a first signal on the first time-frequency resource block; the target identifier being associated with a first identifier; the first identifier being used to identify the sender of the first signal; and the sender of the second signaling being non-co-located with the sender of the first signal.

[0459] As an example, at least one of {the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, the controller / processor 459, the memory 460, and the data source 467} is used to receive the first signaling in this application.

[0460] As an example, at least one of {the antenna 452, the transmitter 454, the multi-antenna transmitter processor 458, the transmitter processor 468, the controller / processor 459, the memory 460, and the data source 467} is used to transmit the second signaling in this application.

[0461] As an example, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, the controller / processor 475, and the memory 476} is used to transmit the first signaling in this application.

[0462] As an example, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, the controller / processor 475, and the memory 476} is used to transmit third signaling in this application.

[0463] As an example, at least one of {the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, the controller / processor 475, and the memory 476} is used to transmit a first signal on a first time-frequency resource block in this application.

[0464] As an example, at least one of {the antenna 420, the receiver 418, the multi-antenna receiver processor 472, the receiver processor 470, the controller / processor 475, and the memory 476} is used to receive a first signal on a first time-frequency resource block in this application.

[0465] Example 5

[0466] Example 5 illustrates a wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 5 As shown. In the appendix Figure 5 In this system, the first node U1, the second node U2, and the third node U3 communicate via an air interface.

[0467] for First node U1 In step S11, the first signaling is received; in step S12, the first channel sensing is performed; and in step S13, the second signaling is sent.

[0468] for Second node U2 In step S21, a first signaling is sent; in step S22, a second signaling is received; and in step S23, a first signal is sent on the first time-frequency resource block.

[0469] for Third node U3 In step S31, the second signaling is received; in step S32, the first signal is received on the first time-frequency resource block.

[0470] In embodiment 5, the first signaling indicates a first identifier and a first parameter; the first identifier is used to identify the second node U2; the first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first signaling is used to trigger first channel sensing; the first parameter is used by the first node U1 to perform the first channel sensing; the first channel sensing is used by the first node U1 to determine a first time-frequency resource block; the second signaling is used by the first node U1 to indicate a target identifier and the first time-frequency resource block; the first identifier is used by the first node U1 to determine the target identifier; the second identifier is used to identify the third node U3, ... The second identifier is used by the first node U1 to generate the target identifier; the first time-frequency resource block is reserved for the transmission of the first signal; the second node U2 and the first node U1 are not co-located; the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block, and the interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value; the second signaling includes a first field, which is used to indicate the first time offset value; the reception timing of the second signaling is used by the second node U2 to determine the transmission timing of the first signal; the first signal indicates the target identifier.

[0471] As an example, the first node U1 and the second node U2 communicate via a PC5 interface.

[0472] As an example, the first node U1 and the third node U3 communicate via a PC5 interface.

[0473] As an example, the second node U2 and the third node U3 communicate via a PC5 interface.

[0474] In one embodiment, the second node U2 is the sender of the first signal.

[0475] In one embodiment, the second node U2 is the sender of the first signaling.

[0476] As one embodiment, the second node U2 and the first node U1 are not co-located.

[0477] In one embodiment, the second node U2 and the first node U1 are different communication nodes.

[0478] As one embodiment, the second node U2 and the first node U1 are different user equipment.

[0479] As an example, the backhaul link between the second node U2 and the first node U1 is non-ideal (i.e., the delay cannot be ignored).

[0480] As an example, the second node U2 does not share the same baseband device as the first node U1.

[0481] As one embodiment, the baseband device of the second node U2 is different from the baseband device of the first node U1.

[0482] Example 6

[0483] Example 6 illustrates a wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 6 As shown. In the appendix Figure 6 In this system, the first node U4, the second node U5, and the third node U6 communicate via an air interface.

[0484] for First node U4 In step S41, the first signaling is received; in step S42, the first channel sensing is performed; and in step S43, the second signaling is sent.

[0485] for Second node U5 In step S51, a third signaling is sent; in step S52, a second signaling is received; and in step S53, a first signaling is sent on the first time-frequency resource block.

[0486] for Third node U6 In step S61, the second signaling is received; in step S62, the first signal is received on the first time-frequency resource block.

[0487] In embodiment 6, the third signaling is used by the second node U5 to indicate a first identifier and a first parameter; the first signaling indicates the first identifier and the first parameter; the first identifier is used to identify the second node U5; the first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first signaling is used to trigger first channel sensing; the first parameter is used by the first node U4 to perform the first channel sensing; the first channel sensing is used by the first node U4 to determine a first time-frequency resource block; the second signaling is used by the first node U4 to indicate a target identifier and the first time-frequency resource block; the first identifier is used by the first node U4 to determine the target identifier; the second identifier is... The second identifier is used to identify the third node U6, and the first node U4 uses the second identifier to generate the target identifier; the first time-frequency resource block is reserved for the transmission of the first signal; the second node U5 and the first node U4 are not co-located; the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block, and the interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value; the second signaling includes a first field, which is used to indicate the first time offset value; the reception timing of the second signaling is used by the second node U5 to determine the transmission timing of the first signal; the first signal indicates the target identifier.

[0488] As one embodiment, the third signaling includes one or more fields in a PHY layer signaling.

[0489] As an example, the third signaling includes one or more fields in an SCI.

[0490] As an example, the third signaling includes one or more fields in a UCI (Uplink Control Information).

[0491] As one embodiment, the third signaling includes all or part of a higher-level signaling.

[0492] As one embodiment, the third signaling includes all or part of an RRC layer signaling.

[0493] As one embodiment, the third signaling includes all or part of a MAC layer signaling.

[0494] As an example, the channel occupied by the third signaling includes PSCCH.

[0495] As an example, the channel occupied by the third signaling includes PSSCH.

[0496] As an example, the channel occupied by the third signaling includes PUCCH (Physical Uplink Control Channel).

[0497] As an example, the channel occupied by the third signaling includes PUSCH (Physical Uplink Shared Channel).

[0498] As an example, the third signaling directly indicates the first identifier and the first parameter.

[0499] As an example, the third signaling indirectly indicates the first identifier and the first parameter.

[0500] As an example, the third signaling directly indicates the first parameter, and the third signaling indirectly indicates the first identifier.

[0501] As one embodiment, the third signaling includes the first identifier.

[0502] As an example, the third signaling includes the first parameter.

[0503] As one embodiment, the third signaling includes the first identifier and the first parameter.

[0504] As one embodiment, the third signaling indicates the first identifier, and the first signaling includes the first parameter.

[0505] As an example, the first identifier is used to scramble the third signaling, which includes the first parameter.

[0506] As an example, the first identifier is used to generate the scrambling sequence of the third signaling.

[0507] As an example, the first identifier is used to determine the problem-solving reference signal of the third signaling.

[0508] As one embodiment, the third signaling includes a third control signaling and a third bit block, the third bit block comprising a positive integer number of bits.

[0509] As an example, the third control signaling is used to indicate the first identifier, and the third bit block is used to indicate the first parameter.

[0510] As an example, the first identifier is used to scramble the third control signaling.

[0511] As an example, the third bit block includes the first parameter.

[0512] As an example, the third control signaling is transmitted on the PSCCH, and the third bit block is transmitted on the PSSCH.

[0513] As an example, the third signaling is transmitted on the PUCCH.

[0514] As an example, the third signaling is transmitted on the PUSCH.

[0515] As an example, the third control signaling is an SCI.

[0516] As an example, the third control signaling is a UCI.

[0517] As an example, a third bit block is used to generate the third signaling, the third bit block comprising a positive integer number of bits.

[0518] As an example, the third bit block comprises a positive integer number of bits, and all or some of the positive integer number of bits in the third bit block are used to generate the third signaling.

[0519] Example 7

[0520] Example 7 illustrates a schematic diagram of the relationship between a first signaling, a second signaling, and a first signal according to an embodiment of this application, as shown in the attached diagram. Figure 7 As shown.

[0521] In embodiment 7, the second node sends the first signaling, which indicates the first identifier and the first parameter; the first node receives the first signaling, which is used to trigger the first channel sensing, the first parameter is used to perform the first channel sensing, and the first channel sensing is used to determine the first time-frequency resource block; the first node sends the second signaling, which indicates the target identifier and the first time-frequency resource block; both the second node and the third node receive the second signaling, and the target identifier is related to the second node; the second node sends the first signal on the first time-frequency resource block, and the third node receives the first signal on the first time-frequency resource block.

[0522] As an example, the statement that the target identifier is related to the second node means that the target identifier is used to determine the first identifier, and the first identifier is used to indicate the second node.

[0523] As one embodiment, the second signaling is sent before the time domain occupied by the first time-frequency resource block.

[0524] As one embodiment, the second node detects the second signaling and sends the first signal on the first time-frequency resource block.

[0525] As an example, if the second node does not detect the second signaling, the second node abandons sending the first signal.

[0526] As an example, when the second node detects the second signaling, the second node sends the first signal on the first time-frequency resource block; when the second node does not detect the second signaling, the second node abandons sending the first signal.

[0527] As an example, the third node detects the second signaling and receives the first signal on the first time-frequency resource block.

[0528] As an example, if the third node does not detect the second signaling, the third node will not receive the first signal.

[0529] As an example, when the third node detects the second signaling, the third node receives the first signal on the first time-frequency resource block; when the third node does not detect the second signaling, the third node abandons receiving the first signal.

[0530] As an example, the time-domain resources occupied by the second signaling are earlier than the start time of the first time-frequency resource block.

[0531] As an example, the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block.

[0532] As an example, the interval between the start time of the time domain resources occupied by the second signaling and the start time of the time domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

[0533] As one embodiment, the first time offset includes a positive integer number of time slots.

[0534] As one embodiment, the first time offset includes a positive integer number of multicarrier symbols.

[0535] As an example, the first time offset is an integer multiple of 0.5 milliseconds.

[0536] As an example, the first time offset value is predefined.

[0537] As an example, the first time offset value is pre-configured.

[0538] As an example, the first time offset value is fixed.

[0539] As an example, the first time offset value is configured via RRC signaling.

[0540] As one embodiment, the second signaling is used to indicate the first time offset.

[0541] As one embodiment, the second signaling includes a first field, which is used to indicate the first time offset value.

[0542] As one embodiment, the second signaling includes a positive integer number of fields, and the first field is one of the positive integer number of fields included in the second signaling, the first field indicating the first time offset value.

[0543] As one embodiment, the receiving timing of the second signaling is used to determine the sending timing of the first signal.

[0544] As an example, the timing of transmitting the first signal is later than the timing of receiving the second signaling.

[0545] As an example, the transmission timing of the first signal is equal to the sum of the reception timing of the second signaling and the first time offset value.

[0546] As one embodiment, the receiving timing of the second signaling is shifted backward by a positive integer number of time slots in the time domain, which is equal to the sending timing of the first signal.

[0547] As an example, the receiving timing of the second signaling is shifted backward by a positive integer number of multicarrier symbols in the time domain, which is equal to the transmitting timing of the first signal.

[0548] As an example, the timing of receiving the second signaling is used to determine the timing of sending the first signal, and the receiver of the first signal is a node device other than the first node device.

[0549] As an example, the timing of receiving the second signaling is used to determine the timing of sending the first signal, and the receiver of the first signal is a node other than the first node.

[0550] As an example, the timing of receiving the second signaling is used to determine the timing of sending the first signal, and the receiver of the first signal is the third node.

[0551] As an example, the timing of receiving the second signaling is used to determine the timing of sending the first signal, and the receiver of the first signal is not co-located with the first node.

[0552] As an example, the receiver of the first signal is not co-located with the first node.

[0553] As one example, the receiver of the first signal is a different communication node from the first node.

[0554] As an example, the receiver of the first signal is a different user equipment from the first node.

[0555] As an example, the backhaul link between the receiver of the first signal and the first node is non-ideal (i.e., the delay cannot be ignored).

[0556] As an example, the receiver of the first signal does not share the same baseband device as the first node.

[0557] As one embodiment, the baseband device of the receiver of the first signal is different from the baseband device of the first node.

[0558] Example 8

[0559] Example 8 illustrates a schematic diagram of the relationship between the first signaling, the second signaling, the third signaling, and the first signal according to an embodiment of this application, as shown in the attached diagram. Figure 8 As shown.

[0560] In embodiment 8, the second node sends the third signaling, which is used to indicate the first identifier and the first parameter; the fourth node receives the third signaling and sends the first signaling, which is used to indicate the first identifier and the first parameter; the first node receives the first signaling, which is used to trigger the first channel sensing, the first parameter is used to perform the first channel sensing, and the first channel sensing is used to determine the first time-frequency resource block; the first node sends the second signaling, which indicates the target identifier and the first time-frequency resource block; both the second node and the third node receive the second signaling, and the target identifier is related to the second node; the second node sends the first signal on the first time-frequency resource block, and the third node receives the first signal on the first time-frequency resource block.

[0561] As one embodiment, the second identifier includes a destination identifier.

[0562] As one embodiment, the second identifier includes a layer 1 destination identifier.

[0563] As one example, the second identifier includes the SL destination identifier.

[0564] As one embodiment, the second identifier is used to identify the receiver of the first signal.

[0565] As one embodiment, the second identifier is used to indicate the receiver of the first signal.

[0566] As one embodiment, the second identifier is used to indicate a target recipient of the second signaling.

[0567] As an example, the second identifier is used to indicate the third node.

[0568] As one embodiment, the second identifier is used to indicate the third node device.

[0569] As one example, the second identifier includes RNTI.

[0570] As one example, the second identifier includes C-RNTI.

[0571] As one example, the second identifier includes TC-RNTI.

[0572] As one example, the second identifier includes the IMSI.

[0573] As an example, the second identifier is a positive integer less than 16777217.

[0574] As an example, the second identifier is 2 to the power of 3.

[0575] As one embodiment, the second identifier includes X3 bits, where X3 is a positive integer.

[0576] As an example, X3 is configurable.

[0577] As an example, X3 equals 16.

[0578] As an example, X3 equals 8.

[0579] As an example, the target identifier is related to the second identifier.

[0580] As an example, the second identifier is used to generate the target identifier.

[0581] As one embodiment, the target identifier includes the second identifier.

[0582] As an example, the target identifier is the same as the second identifier.

[0583] As an example, the second identifier is the second sub-identifier in the target identifier.

[0584] As one embodiment, the node indicated by the second sub-identifier in the target identifier is co-located with the node indicated by the second identifier.

[0585] As an example, the node indicated by the second sub-identifier in the target identifier and the node indicated by the second identifier are both the third node.

[0586] As an example, the backhaul link between the node indicated by the second sub-identifier in the target identifier and the node indicated by the second identifier is ideal (i.e., the delay can be ignored).

[0587] As one embodiment, the node indicated by the second sub-identifier in the target identifier shares the same baseband device as the node indicated by the second identifier.

[0588] As an example, the second sub-identifier and the second identifier in the target identifier are both used to indicate the same node.

[0589] As an example, the second sub-identifier and the second identifier in the target identifier are both used for the same user equipment.

[0590] As an example, both the second sub-identifier and the second identifier in the target identifier are used to indicate the third node.

[0591] As an example, both the second sub-identifier and the second identifier in the target identifier are used to indicate the receiver of the first signal.

[0592] As an example, the second sub-identifier and the second identifier in the target identifier are both used to indicate the same node, wherein the second sub-identifier in the target identifier is the destination identifier of the node, and the second identifier is the destination identifier of the node.

[0593] As an example, both the second sub-identifier and the second identifier in the target identifier are used to indicate the third node, where the second identifier is the destination identifier of the third node and the second sub-identifier in the target identifier is the destination identifier of the third node.

[0594] As an example, the second sub-identifier and the second identifier in the target identifier are both used to indicate the third node, the second identifier is the destination identifier of the third node, and the second sub-identifier in the target identifier is the C-RNTI of the third node.

[0595] As an example, the second sub-identifier and the second identifier in the target identifier are both used to indicate the third node, the second sub-identifier in the target identifier is the destination identifier of the third node, and the second identifier is the C-RNTI of the third node.

[0596] As one embodiment, the target identifier is the sum of the deviation values ​​between the second identifier and the second identifier.

[0597] As one embodiment, the target identifier is the difference between the second identifier and the deviation value of the second identifier.

[0598] As an example, the second identification deviation value is a positive integer.

[0599] As an example, the sender of the first signal assumes that the third node receives the first signal.

[0600] As one embodiment, the first signal includes the identifier of the third node.

[0601] As one embodiment, the first signal includes the second identifier, which is used to indicate the third node.

[0602] As an example, the assumption that the third node receives the first signal means that: when the third node detects the second signaling, the third node receives the first signal; when the third node does not detect the second signaling, the third node abandons receiving the first signal.

[0603] Example 9

[0604] Example 9 illustrates a flowchart of performing a first channel sensing operation according to an embodiment of this application, as shown in the attached diagram. Figure 9 As shown.

[0605] In Example 9, in step S901, a first resource pool is determined; in step S902, a first candidate time-frequency resource block is determined; in step S903, a first sensing window is determined; in step S904, a first threshold value is determined; in step S905, a first initial resource set is determined; in step S906, a first reference time-frequency resource block is measured; in step S907, it is determined whether the first reference measurement value is higher than the first threshold value; when the first reference measurement value is higher than the first threshold value, step S908 is executed, and the first candidate time-frequency resource block does not belong to the first candidate resource set. When the first reference measurement value is not higher than the first threshold value, step S909 is executed, and the first candidate time-frequency resource block belongs to the first candidate resource set; in step S910, it is determined whether the number of time-frequency resource blocks in the first candidate resource set is less than the first value; when the number of time-frequency resource blocks in the first candidate resource set is less than the first value, step S911 is executed to update the first threshold value, and then execution starts again from step S905; when the number of time-frequency resource blocks in the first candidate resource set is not less than the first value, the first channel sensing is stopped.

[0606] As an example, the first alternative time-frequency resource block is one of the multiple time-frequency resource blocks included in the first resource pool in the first parameter.

[0607] As an example, the number of frequency domain resources occupied by the first candidate time-frequency resource block is equal to the size of the first frequency domain resource in the first parameter.

[0608] As an example, the number of PRBs occupied by the first alternative time-frequency resource block is equal to the first frequency domain resource size in the first parameter.

[0609] As an example, the number of sub-channels occupied by the first alternative time-frequency resource block is equal to the first frequency domain resource size in the first parameter.

[0610] As one embodiment, the first sensing window includes a positive integer number of time slots.

[0611] As one embodiment, the first sensing window includes a positive integer number of multicarrier symbols.

[0612] As an example, the first sensing window is earlier in the time domain than the first alternative time-frequency resource block.

[0613] As an example, the first threshold value is a positive integer.

[0614] As an example, the unit of the first threshold value is dB.

[0615] As an example, the first threshold value is related to the first priority in the first parameter.

[0616] As an example, the first priority in the first parameter is used to determine the first threshold value.

[0617] As one embodiment, the first initial resource set includes multiple time-frequency resource blocks, and the multiple time-frequency resource blocks included in the first initial resource set belong to the first resource pool.

[0618] As an example, the first alternative time-frequency resource block is one of the multiple time-frequency resource blocks included in the first initial resource set.

[0619] As an example, the first reference time-frequency resource block is associated with the first alternative time-frequency resource block, and the time-domain resources occupied by the first reference time-frequency resource block are within the first perception window.

[0620] As an example, the first reference time-frequency resource block and the first alternative time-frequency resource block overlap in the frequency domain.

[0621] As an example, the frequency domain resources occupied by the first reference time-frequency resource block are the same as those occupied by the first alternative time-frequency resource block.

[0622] As an example, the first reference time-frequency resource block and the first alternative time-frequency resource block are spaced apart in the time domain by an integer multiple of a first time period.

[0623] As an example, the first time period is pre-configured.

[0624] As an example, the first time period is indicated by the first signaling.

[0625] As an example, the measurement for the first reference time-frequency resource block is the first reference measurement value.

[0626] As an example, the first reference measurement includes L1-RSRP.

[0627] As an example, whether the first reference measurement value is higher than the first threshold value is used to determine whether the first candidate time-frequency resource block belongs to the first candidate resource set.

[0628] As an example, if the first reference measurement value is higher than the first threshold value, the first candidate time-frequency resource block does not belong to the first candidate resource set.

[0629] As an example, if the first reference measurement value is lower than the first threshold value, the first candidate time-frequency resource block belongs to the first candidate resource set.

[0630] As an example, the first reference measurement value is equal to the first threshold value, and the first candidate time-frequency resource block belongs to the first candidate resource set.

[0631] As one embodiment, the first candidate resource set includes a positive integer number of time-frequency resource blocks.

[0632] As an example, the positive integer number of time-frequency resource blocks included in the first candidate resource set belong to the first resource pool.

[0633] As an example, the positive integer number of time-frequency resource blocks included in the first candidate resource set belong to the first initial resource set.

[0634] As an example, whether the number of time-frequency resource blocks included in the first candidate resource set is less than a first value is used to determine whether to generate the target information.

[0635] As an example, the first value is a positive integer.

[0636] As an example, the first value is less than the number of time-frequency resource blocks included in the first initial resource set.

[0637] As an example, the number of time-frequency resource blocks included in the first candidate resource set is greater than the first value, and the target information is generated.

[0638] As an example, the number of time-frequency resource blocks included in the first candidate resource set is equal to the first value, and the target information is generated.

[0639] As an example, if the number of time-frequency resource blocks included in the first candidate resource set is less than the first value, the generation of the target information is abandoned.

[0640] As an example, if the number of time-frequency resource blocks included in the first candidate resource set is less than the first value, the first threshold value is updated, and steps S905 to S910 are executed again.

[0641] As an example, the updated first threshold is the sum of the first threshold value and 3dB.

[0642] As an example, the updated first threshold is the sum of the first threshold value and 6dB.

[0643] As one embodiment, the first alternative time-frequency resource set includes the first time-frequency resource block.

[0644] As an example, the first time-frequency resource block is one of the positive integer number of time-frequency resource blocks included in the first candidate time-frequency resource set.

[0645] As an example, the first time-frequency resource block is selected autonomously by the first node from the positive integer number of time-frequency resource blocks included in the first candidate time-frequency resource set.

[0646] As an example, the first time-frequency resource block is selected with equal probability from the positive integer number of time-frequency resource blocks included in the first candidate time-frequency resource set.

[0647] Example 10

[0648] Example 10 illustrates a structural block diagram of a processing device for a first node, as shown in the attached diagram. Figure 10 As shown. In Embodiment 10, the first node device processing device 1000 mainly consists of a first receiver 1001, a second receiver 1002 and a first transmitter 1003.

[0649] As one embodiment, the first receiver 1001 includes the appendix to this application. Figure 4 The antenna 452, transmitter / receiver 454, multi-antenna receiver processor 458, receiver processor 456, controller / processor 459, memory 460, and data source 467 are at least one of them.

[0650] As one embodiment, the second receiver 1002 includes the appendix to this application. Figure 4 The antenna 452, transmitter / receiver 454, multi-antenna receiver processor 458, receiver processor 456, controller / processor 459, memory 460, and data source 467 are at least one of them.

[0651] As one embodiment, the first transmitter 1003 includes the appendix to this application. Figure 4 The antenna 452, transmitter / receiver 454, multi-antenna transmitter processor 457, transmitter processor 468, controller / processor 459, memory 460, and data source 467 are at least one of them.

[0652] In embodiment 10, the first receiver 1001 receives a first signaling, which is used to trigger a first channel sensing; the second receiver 1002 performs the first channel sensing, which is used to determine a first time-frequency resource block; the first transmitter 1003 sends a second signaling, which is used to indicate a target identifier and the first time-frequency resource block; the first signaling indicates a first identifier and a first parameter; the first identifier is used to identify the second node device 1100 in this application; the first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the first parameter is used to perform the first channel sensing; the first identifier is used to determine the target identifier; the second node device 1100 is the sender of a first signal, and the first time-frequency resource block is reserved for the transmission of the first signal; the second node device 1100 and the first node device 1000 are not co-located.

[0653] As an example, the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block, and the interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

[0654] As one embodiment, the second signaling includes a first field, which is used to indicate the first time offset value; the receiving timing of the second signaling is used to determine the sending timing of the first signal, and the receiver of the first signal is a node other than the first node device 1000.

[0655] As an example, the second identifier is used to identify the third node device 1200 in this application, which is the receiver of the first signal, and the second identifier is used to generate the target identifier.

[0656] As an example, the first signal indicates the target identifier.

[0657] As an example, the first node device 1000 is a user equipment.

[0658] As an example, the first node device 1000 is a relay node.

[0659] As an example, the first node device 1000 is a base station device.

[0660] Example 11

[0661] Example 11 illustrates a structural block diagram of a processing device for a second node, as shown in the attached diagram. Figure 11As shown. In Embodiment 11, the second node device processing device 1100 mainly consists of a second transmitter 1101, a third receiver 1102, and a third transmitter 1103.

[0662] As one embodiment, the second transmitter 1101 includes the appendix to this application. Figure 4 The antenna 452, transmitter / receiver 454, multi-antenna transmitter processor 457, transmitter processor 468, controller / processor 459, memory 460, and data source 467 are at least one of them.

[0663] As one embodiment, the third receiver 1102 includes the appendix to this application. Figure 4 The antenna 452, transmitter / receiver 454, multi-antenna receiver processor 458, receiver processor 456, controller / processor 459, memory 460, and data source 467 are at least one of them.

[0664] As one embodiment, the third transmitter 1103 includes the appendix to this application. Figure 4 The antenna 452, transmitter / receiver 454, multi-antenna transmitter processor 457, transmitter processor 468, controller / processor 459, memory 460, and data source 467 are at least one of them.

[0665] In embodiment 11, the second transmitter 1101 sends a third signaling message, which is used to indicate a first identifier and a first parameter; the third receiver 1102 receives a second signaling message, which indicates a target identifier and a first time-frequency resource block; the third transmitter 1103 sends a first signal on the first time-frequency resource block; the first identifier is used to identify the second node device 1100; the first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size; the target identifier is related to the first identifier.

[0666] As an example, the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block, and the interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

[0667] As one embodiment, the second signaling includes a first field, which is used to indicate the first time offset value; the reception timing of the second signaling is used to determine the transmission timing of the first signal, and the receiver of the first signal and the sender of the second signaling are not co-located.

[0668] As an example, the second identifier is used to identify the third node device 1200 in this application, which is the receiver of the first signal, and the second identifier is used to generate the target identifier.

[0669] As an example, the first signal is used to indicate the target identifier.

[0670] As one embodiment, the second node device 1100 is a user equipment.

[0671] As one embodiment, the second node device 1100 is a relay node.

[0672] As one embodiment, the second node device 1100 is a base station device.

[0673] Example 12

[0674] Example 12 illustrates a structural block diagram of a processing device for a third node, as shown in the attached diagram. Figure 12 As shown. In Embodiment 12, the third node device processing device 1200 mainly consists of a fourth receiver 1201 and a fifth receiver 1202.

[0675] As one embodiment, the fourth receiver 1201 includes the appendix to this application. Figure 4 The antenna 452, transmitter / receiver 454, multi-antenna receiver processor 458, receiver processor 456, controller / processor 459, memory 460, and data source 467 are at least one of them.

[0676] As one embodiment, the fifth receiver 1202 includes the appendix to this application. Figure 4 The antenna 452, transmitter / receiver 454, multi-antenna receiver processor 458, receiver processor 456, controller / processor 459, memory 460, and data source 467 are at least one of them.

[0677] In embodiment 12, the fourth receiver 1201 receives a second signaling, the second signaling indicating a target identifier and a first time-frequency resource block; the fifth receiver 1202 receives a first signal on the first time-frequency resource block; the target identifier is related to a first identifier; the first identifier is used to identify the sender of the first signal; the sender of the second signaling and the sender of the first signal are not co-located.

[0678] As an example, the time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block, and the time-domain resources occupied by the second signaling are separated from the time-domain resources occupied by the first time-frequency resource block by a first time offset.

[0679] As one embodiment, the second signaling includes a first field, which is used to indicate the first time offset value; the reception timing of the second signaling is used to determine the transmission timing of the first signal, and the sender of the first signal and the sender of the second signaling are not co-located.

[0680] As an example, the second identifier is used to identify the third node device 1200, and the second identifier is used to generate the target identifier.

[0681] As an example, the first signal indicates the target identifier.

[0682] As an example, the third node device 1200 is a user equipment.

[0683] As an example, the third node device 1200 is a relay node.

[0684] As an example, the third node device 1200 is a base station device.

[0685] Those skilled in the art will understand that all or part of the steps in the above methods can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory, hard disk, or optical disk. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiments can be implemented in hardware or in the form of software functional modules. This application is not limited to any specific combination of software and hardware. The first node device in this application includes, but is not limited to, wireless communication devices such as mobile phones, tablets, laptops, network cards, low-power devices, eMTC devices, NB-IoT devices, vehicle communication devices, aircraft, airplanes, drones, and remote-controlled airplanes. The second node device in this application includes, but is not limited to, wireless communication devices such as mobile phones, tablets, laptops, network cards, low-power devices, eMTC devices, NB-IoT devices, vehicle communication devices, aircraft, airplanes, drones, and remote-controlled airplanes. The user equipment or UE or terminal in this application includes, but is not limited to, wireless communication devices such as mobile phones, tablets, laptops, network cards, low-power devices, eMTC devices, NB-IoT devices, vehicle communication devices, aircraft, airplanes, drones, and remote-controlled airplanes. The base station equipment or base station or network-side equipment in this application includes, but is not limited to, macrocell base stations, microcell base stations, home base stations, relay base stations, eNBs, gNBs, Transmitter Receiver Nodes (TRPs), GNSS, relay satellites, satellite base stations, airborne base stations, and other wireless communication equipment.

[0686] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A first node used for wireless communication, comprising: A first receiver is configured to receive a first signaling from a second node. The first signaling indicates a first identifier and a first parameter. The first identifier includes a source identifier that identifies the second node. The first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size. The first signaling is used to trigger a first channel awareness. A second receiver, configured to perform the first channel sensing using the first parameter, the first channel sensing comprising: determining a first time-frequency resource block reserved for transmitting a first signal from a first resource pool; measuring a first reference time-frequency resource block within a first sensing window; comparing the first reference measurement value with a first threshold value; and updating the first threshold value if the number of candidate time-frequency resource blocks satisfying the threshold value condition is less than a first value; and A first transmitter is configured to simultaneously send a second signaling message to a second node and a third node, the second signaling message indicating a target identifier and a first time-frequency resource block; the second node is the sender of the first signal, and the third node is the receiver of the first signal; The first identifier is used to determine the target identifier, which includes a destination identifier and is used to identify the third node.

2. The first node according to claim 1, characterized in that, The first signaling includes a higher-layer signaling; or, the first signaling includes an SCI, and the channel occupied by the first signaling includes PSCCH; or, the first signaling includes an SCI and a MAC layer signaling, and the channel occupied by the first signaling includes PSSCH.

3. The first node according to claim 1, characterized in that, The second signaling includes SCI format 1-A and an SCI, and the channels occupied by the second signaling include PSCCH and PSSCH.

4. The first node according to claim 2, characterized in that, The second signaling includes SCI format 1-A and an SCI, and the channels occupied by the second signaling include PSCCH and PSSCH.

5. The first node according to any one of claims 1 to 4, characterized in that, The first signaling includes the first priority, the first time length, and the first frequency domain resource size. The first priority is associated with the first signal. The first time length includes a positive integer number of time slots. The first frequency domain resource size is equal to the number of sub-channels occupied by the first time-frequency resource block. The first signaling is used to indirectly indicate the first resource pool, which includes a sub-link resource pool.

6. The first node according to any one of claims 1 to 4, characterized in that, The first identifier comprises 8 bits, and the target identifier comprises 16 bits.

7. The first node according to claim 5, characterized in that, The first identifier comprises 8 bits, and the target identifier comprises 16 bits.

8. The first node according to any one of claims 1-4 and 7, characterized in that, The first time-frequency resource block includes PSCCH and PSSCH; the first signal includes a first target signaling and a first target bit block, and the first target signaling includes an SCI.

9. The first node according to claim 5, characterized in that, The first time-frequency resource block includes PSCCH and PSSCH; the first signal includes a first target signaling and a first target bit block, and the first target signaling includes an SCI.

10. The first node according to claim 6, characterized in that, The first time-frequency resource block includes PSCCH and PSSCH; the first signal includes a first target signaling and a first target bit block, and the first target signaling includes an SCI.

11. The first node according to any one of claims 1-4, 7, and 9-10, characterized in that, The time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block. The interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

12. The first node according to claim 5, characterized in that, The time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block. The interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

13. The first node according to claim 6, characterized in that, The time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block. The interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

14. The first node according to claim 8, characterized in that, The time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block. The interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

15. The first node according to claim 11, characterized in that, The second signaling includes a first field, which is used to indicate the first time offset value; the receiving timing of the second signaling is used to determine the sending timing of the first signal, and the receiver of the first signal is a node other than the first node.

16. The first node according to any one of claims 12 to 14, characterized in that, The second signaling includes a first field, which is used to indicate the first time offset value; the receiving timing of the second signaling is used to determine the sending timing of the first signal, and the receiver of the first signal is a node other than the first node.

17. The first node according to any one of claims 1-4, 7, 9-10, and 12-15, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

18. The first node according to claim 5, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

19. The first node according to claim 6, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

20. The first node according to claim 8, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

21. The first node according to claim 11, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

22. The first node according to claim 16, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

23. A second node used for wireless communication, characterized in that, include: A second transmitter is configured to send a first signaling to a first node. The first signaling is used to indicate a first identifier and a first parameter. The first identifier includes a source identifier that identifies the second node. The first parameter includes at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size. The first signaling is used to trigger channel awareness at the first node. The channel awareness includes: determining a first time-frequency resource block reserved for transmitting a first signal from the first resource pool; measuring a first reference time-frequency resource block within a first sensing window; comparing the first reference measurement value with a first threshold value; and updating the first threshold value if the number of candidate time-frequency resource blocks that meet the threshold value condition is less than a first value. A third receiver is configured to receive a second signaling from the first node, the second signaling indicating a target identifier and the first time-frequency resource block; A third transmitter is configured to transmit the first signal on the first time-frequency resource block; the receiver of the first signal is a third node. Wherein, the first identifier determines the target identifier, the target identifier includes a destination identifier, the target identifier is used to identify the third node, and the second signaling is sent by the first node to both the second node and the third node simultaneously.

24. The second node according to claim 23, characterized in that, The second signaling is detected within the first monitoring window, the start time of which is later in the time domain than the transmission time of the first signaling.

25. A method used in a first node of wireless communication, characterized in that, include: A first signaling is received from a second node, the first signaling indicating a first identifier and a first parameter, the first identifier including a source identifier that identifies the second node, the first parameter including at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size, wherein the first signaling is used to trigger a first channel awareness; The first channel sensing is performed using the first parameter, the first channel sensing comprising: determining a first time-frequency resource block reserved for transmitting a first signal from the first resource pool; measuring a first reference time-frequency resource block within a first sensing window; comparing the first reference measurement value with a first threshold value; and updating the first threshold value if the number of candidate time-frequency resource blocks satisfying the threshold value condition is less than a first value; and Simultaneously, a second signaling message is sent to the second node and the third node, the second signaling message indicating the target identifier and the first time-frequency resource block; the second node is the sender of the first signal, and the third node is the receiver of the first signal; The first identifier is used to determine the target identifier, which includes a destination identifier and is used to identify the third node.

26. The method according to claim 25, characterized in that, The first signaling includes a higher-layer signaling; or, the first signaling includes an SCI, and the channel occupied by the first signaling includes PSCCH; or, the first signaling includes an SCI and a MAC layer signaling, and the channel occupied by the first signaling includes PSSCH.

27. The method according to claim 25, characterized in that, The second signaling includes SCI format 1-A and an SCI, and the channels occupied by the second signaling include PSCCH and PSSCH.

28. The method according to claim 26, characterized in that, The second signaling includes SCI format 1-A and an SCI, and the channels occupied by the second signaling include PSCCH and PSSCH.

29. The method according to any one of claims 25 to 28, characterized in that, The first signaling includes the first priority, the first time length, and the first frequency domain resource size. The first priority is associated with the first signal. The first time length includes a positive integer number of time slots. The first frequency domain resource size is equal to the number of sub-channels occupied by the first time-frequency resource block. The first signaling is used to indirectly indicate the first resource pool, which includes a sub-link resource pool.

30. The method according to any one of claims 25 to 28, characterized in that, The first identifier comprises 8 bits, and the target identifier comprises 16 bits.

31. The method according to claim 29, characterized in that, The first identifier comprises 8 bits, and the target identifier comprises 16 bits.

32. The method according to any one of claims 25-28 and 31, characterized in that, The first time-frequency resource block includes PSCCH and PSSCH; the first signal includes a first target signaling and a first target bit block, and the first target signaling includes an SCI.

33. The method according to claim 29, characterized in that, The first time-frequency resource block includes PSCCH and PSSCH; the first signal includes a first target signaling and a first target bit block, and the first target signaling includes an SCI.

34. The method according to claim 30, characterized in that, The first time-frequency resource block includes PSCCH and PSSCH; the first signal includes a first target signaling and a first target bit block, and the first target signaling includes an SCI.

35. The method according to any one of claims 25-28, 31, and 33-34, characterized in that, The time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block. The interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

36. The method according to claim 29, characterized in that, The time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block. The interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

37. The method according to claim 30, characterized in that, The time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block. The interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

38. The method according to claim 32, characterized in that, The time-domain resources occupied by the second signaling are earlier than the time-domain resources occupied by the first time-frequency resource block. The interval between the start time of the time-domain resources occupied by the second signaling and the start time of the time-domain resources occupied by the first time-frequency resource block is equal to the first time offset value.

39. The method according to claim 35, characterized in that, The second signaling includes a first field, which is used to indicate the first time offset value; the receiving timing of the second signaling is used to determine the sending timing of the first signal, and the receiver of the first signal is a node other than the first node.

40. The method according to any one of claims 36 to 38, characterized in that, The second signaling includes a first field, which is used to indicate the first time offset value; the receiving timing of the second signaling is used to determine the sending timing of the first signal, and the receiver of the first signal is a node other than the first node.

41. The method according to any one of claims 25-28, 31, 33-34, and 36-39, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

42. The method according to claim 29, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

43. The method according to claim 30, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

44. The method according to claim 32, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

45. The method according to claim 35, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

46. ​​The method according to claim 40, characterized in that, The first signal includes a second identifier, which includes a destination identifier, and the second identifier is used to identify the third node.

47. A method used in a second node for wireless communication, characterized in that, include: A first signaling is sent to a first node, the first signaling indicating a first identifier and a first parameter, the first identifier including a source identifier identifying the second node, the first parameter including at least one of a first resource pool, a first priority, a first time length, and a first frequency domain resource size, wherein the first signaling is used to trigger channel awareness at the first node, the channel awareness including: determining a first time-frequency resource block reserved for transmitting a first signal from the first resource pool, measuring a first reference time-frequency resource block within a first sensing window, comparing the first reference measurement value with a first threshold value, and updating the first threshold value if the number of candidate time-frequency resource blocks that meet the threshold value condition is less than a first value; Receive a second signaling message from the first node, the second signaling message indicating the target identifier and the first time-frequency resource block; and The first signal is transmitted on the first time-frequency resource block; the receiver of the first signal is the third node; Wherein, the first identifier is used to determine the target identifier, the target identifier includes a destination identifier, the target identifier is used to identify the third node, and the second signaling is sent by the first node to both the second node and the third node simultaneously.

48. The method according to claim 47, characterized in that, The second signaling is detected within the first monitoring window, the start time of which is later in the time domain than the transmission time of the first signaling.

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