A method and device for wireless communication of a secondary link

Abstract

The present application discloses a method and apparatus for wireless communication of a side link. A first node receives a first signaling through an air interface; as a response to receiving the first signaling, a first wireless signal is sent, the first wireless signal includes a second signaling; a second data unit set is received through the air interface; wherein the second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set. The present application can effectively reduce data retransmission.

Description

Technical Field

[0001] The present application relates to methods and devices in wireless communication systems, and more particularly to methods and devices supporting relay transmission in secondary link wireless communication. Background Art

[0002] Relay, as a multi-hop transmission technology, can improve throughput and coverage. Relay communication is a common method in cellular network communication. The data of the source node reaches the remote node through the forwarding of the relay node. The source node and the remote node are usually base station equipment and user equipment, or both can be user equipment; the relay node can be a network device or a user equipment. Taking the sidelink (SL) transmission in the LTE (Long Term Evolution) system as an example, the transmission from the user equipment (User Equipment, UE) to the relay node (relay node, RN) adopts the sidelink air interface technology, and the transmission from the RN to the base station (eNodeB, eNB) adopts the LTE air interface technology. RN is used for data forwarding between UE and eNB, which is called IP (Internet Protocol) layer forwarding or layer 3 relay (Layer 3 Relay / L3 Relay).

[0003] The application scenarios of future wireless communication systems are becoming more and more diversified, and different application scenarios have different performance requirements for the system. In order to meet the different performance requirements of various application scenarios, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 plenary meeting decided to study the NR (New Radio) technology (or Fifth Generation, 5G), and the NR WI (Work Item) was passed at the 3GPP RAN #75 plenary meeting, and the standardization work on NR began. In response to the rapid development of V2X (Vehicle-to-Everything) business, 3GPP also started the SL (Sidelink) standardization and research work under the NR framework, and decided to start the SI (Study Item) standardization work on NR SL Relay at the 3GPP RAN #86 plenary meeting. Summary of the invention

[0004] The inventors have found through research that introducing relay nodes in SL transmission can improve the transmission quality of the source node and the remote node and enhance the wireless coverage. If the wireless link between the source node and the relay node fails, before switching to a new relay node, using the wireless link between the relay node and the remote node to continue transmission can reduce the data retransmission of the source node, thereby significantly improving the transmission efficiency.

[0005] In view of the above problems, the present application discloses a solution. In the description of the present application, only the NR V2X scenario is used as a typical application scenario or example; the present application is also applicable to other scenarios other than NR V2X facing similar problems (such as relay networks, D2D (Device-to-Device, device-to-device) networks, cellular networks, and scenarios supporting half-duplex user equipment), and can also achieve similar technical effects in the NR V2X scenario. In addition, the use of a unified solution for different scenarios (including but not limited to NR V2X scenarios, downlink communication scenarios, etc.) also helps to reduce hardware complexity and cost. In the absence of conflict, the embodiments and features in the first node of the present application can be applied to any other node, and vice versa. In the absence of conflict, the embodiments and features in the embodiments of the present application can be arbitrarily combined with each other. In particular, the interpretation of the terms (Terminology), nouns, functions, and variables in the present application (if not otherwise specified) can refer to the definitions in the 3GPP specification protocols TS36 series, TS38 series, and TS37 series.

[0006] The present application discloses a method in a first node used for wireless communication, characterized by comprising:

[0007] receiving a first signaling via an air interface;

[0008] In response to receiving the first signaling, sending a first wireless signal, wherein the first wireless signal includes a second signaling;

[0009] receiving a second set of data units over the air interface;

[0010] The second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0011] As an embodiment, the present application is applicable to a scenario of supporting relay nodes in secondary link wireless transmission.

[0012] As an embodiment, the problem to be solved by the present application is: retransmission after a wireless link between a sending node and a relay node fails.

[0013] As an embodiment, the solution of the present application includes: when the wireless link between the sending node and the relay node fails, the relay node sends an end identifier after sending the cached data to trigger the receiving node to feedback a receiving status report; the receiving node does not reconfigure or rebuild the wireless bearer.

[0014] As an embodiment, the beneficial effects of the present application include: reducing data retransmission.

[0015] According to one aspect of the present application, it includes:

[0016] As a response to receiving the first signaling, clear the first identity from the first identity list; monitor the physical layer signaling through the secondary link, and when the detected physical layer signaling includes some bits of any identity in the first identity list, perform channel decoding on the physical layer channel scheduled by the detected physical layer signaling, and when the detected physical layer signaling does not include some bits of any identity in the first identity list, abandon the channel decoding of the physical layer channel scheduled by the detected physical layer signaling;

[0017] The first identity identifies the sender of the first signaling; and the number of bits included in the partial bits is a positive integer multiple of 8. According to one aspect of the present application, it includes:

[0018] sending first information via an air interface;

[0019] The first information indicates that the first wireless link fails; and the receiver of the first information includes the node identified by the first identity.

[0020] According to one aspect of the present application, it includes:

[0021] receiving a third set of data units over the air interface;

[0022] The third data unit set is used to determine the first data unit set; and the reception time of the first signaling is not earlier than the reception time of any data unit in the third data unit set.

[0023] According to one aspect of the present application, it includes:

[0024] receiving second information via an air interface;

[0025] The second information includes the first identity list and the first configuration; the first identity list includes Q identities, where Q is a positive integer; the first configuration includes a first parameter set, which is used to configure a first wireless bearer; the first parameter set is applicable to the first data unit set and the second data unit set.

[0026] According to one aspect of the present application, it includes:

[0027] receiving third information via the air interface;

[0028] The third information indicates a second identity list; the second identity list does not include the first identity; and an identity in the second identity list is used to identify the receiver of the first wireless signal.

[0029] The present application discloses a method used in a second node of wireless communication, characterized by comprising:

[0030] Sending a first signaling via an air interface;

[0031] In which, a first wireless signal is received, the first wireless signal includes second signaling, the second signaling is used to generate a second wireless signal; the second wireless signal is sent; a second data unit set is received through the air interface; the second signaling indicates that the first data unit set has not been received, the first data unit set and the second data unit set are both transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the second node is not co-located with the recipient of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set.

[0032] According to one aspect of the present application, it includes:

[0033] The first identity is cleared from the first identity list; the physical layer signaling of the secondary link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding; when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding;

[0034] The first identity identifies the sender of the first signaling; and the number of bits included in the partial bits is a positive integer multiple of 8.

[0035] According to one aspect of the present application, it includes:

[0036] receiving first information via an air interface;

[0037] The first information indicates that the first wireless link fails.

[0038] According to one aspect of the present application, it includes:

[0039] receiving a third set of wireless signals;

[0040] sending a fourth wireless signal set;

[0041] Among them, a fourth data unit set is recovered from the third wireless signal set, and the fourth data unit set is used to generate the fourth wireless signal set; the fourth data unit set includes the third data unit set; the third data unit set is used to determine the first data unit set; and the sending time of the first signaling is no earlier than the sending time of any wireless signal in the fourth wireless signal set.

[0042] According to one aspect of the present application, it includes:

[0043] receiving a fifth wireless signal;

[0044] sending a sixth wireless signal;

[0045] Among them, second information is recovered from the fifth wireless signal, and the second information is used to generate the sixth wireless signal; the second information includes the first identity list and the first configuration; the first identity list includes Q identities, and Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure a first wireless bearer; the first parameter set is applicable to the first data unit set and the second data unit set.

[0046] According to one aspect of the present application, it includes:

[0047] Third information is received; the third information indicates a second identity list; the second identity list does not include the first identity; an identity in the second identity list is used to identify the recipient of the first wireless signal.

[0048] The present application discloses a method in a third node used for wireless communication, characterized by comprising:

[0049] receiving a second wireless signal, wherein the second wireless signal includes a second signaling;

[0050] sending a second set of data units over the air interface;

[0051] The second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the first signaling is sent; the sender of the first signaling is not co-located with the sender of the second wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0052] According to one aspect of the present application, it includes:

[0053] The first identity is cleared from the first identity list; the physical layer signaling of the secondary link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding; when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding;

[0054] The first identity identifies the sender of the first signaling; and the number of bits included in the partial bits is a positive integer multiple of 8.

[0055] According to one aspect of the present application, it includes:

[0056] First information is sent; wherein the first information indicates that a first wireless link fails; and a receiver of the first information includes a node identified by the first identity.

[0057] According to one aspect of the present application, it includes:

[0058] sending a fifth set of data units via an air interface; the fifth set of data units including the third set of data units;

[0059] The third data unit set is used to determine the first data unit set; and the reception time of the first signaling is not earlier than the reception time of any data unit in the third data unit set.

[0060] According to one aspect of the present application, it includes:

[0061] sending second information via the air interface;

[0062] The second information includes the first identity list and the first configuration; the first identity list includes Q identities, where Q is a positive integer; the first configuration includes a first parameter set, which is used to configure a first wireless bearer; the first parameter set is applicable to the first data unit set and the second data unit set.

[0063] According to one aspect of the present application, it includes:

[0064] sending third information via the air interface;

[0065] The third information indicates a second identity list; the second identity list does not include the first identity; and an identity in the second identity list is used to identify the sender of the second wireless signal.

[0066] The present application discloses a first node used for wireless communication, characterized in that it includes:

[0067] A first receiver receives a first signaling via an air interface;

[0068] A first transmitter, in response to receiving the first signaling, sends a first wireless signal, wherein the first wireless signal includes a second signaling;

[0069] The first receiver receives a second set of data units via an air interface;

[0070] The second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0071] The present application discloses a second node used for wireless communication, characterized in that it includes:

[0072] A second transmitter sends a first signaling via an air interface;

[0073] In which, a first wireless signal is received, the first wireless signal includes second signaling, the second signaling is used to generate a second wireless signal; the second wireless signal is sent; a second data unit set is received through the air interface; the second signaling indicates that the first data unit set has not been received, the first data unit set and the second data unit set are both transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the second node is not co-located with the recipient of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set.

[0074] The present application discloses a third node used for wireless communication, characterized in that it includes:

[0075] A third receiver receives a second wireless signal, wherein the second wireless signal includes a second signaling;

[0076] a third transmitter, transmitting a second set of data units via an air interface;

[0077] The second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the first signaling is sent; the sender of the first signaling is not co-located with the sender of the second wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set. BRIEF DESCRIPTION OF THE DRAWINGS

[0078] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0079] Figure 1 An example of a transmission flow chart of a first node according to an embodiment of the present application is provided;

[0080] Figure 2 A schematic diagram illustrating a network architecture according to an embodiment of the present application is illustrated;

[0081] Figure 3 A schematic diagram illustrating a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0082] Figure 4 A hardware module schematic diagram of a communication device according to an embodiment of the present application is illustrated;

[0083] Figure 5 An example of a wireless signal transmission flow chart according to an embodiment of the present application is provided;

[0084] Figure 6 An example of a MAC PDU format diagram according to an embodiment of the present application is shown;

[0085] Figure 7 A schematic diagram illustrating a second signaling format according to an embodiment of the present application is illustrated;

[0086] Figure 8 A schematic diagram illustrating another second signaling format according to an embodiment of the present application;

[0087] Fig. 9 A schematic diagram illustrating a first signaling format according to an embodiment of the present application;

[0088] Fig.10A schematic diagram illustrating another first signaling format according to an embodiment of the present application;

[0089] Fig.11 A schematic diagram illustrating a wireless protocol architecture for relay transmission according to an embodiment of the present application is provided;

[0090] Fig.12 An example structural block diagram of a processing device in a first node according to an embodiment of the present application is shown;

[0091] Fig.13 An example structural block diagram of a processing device in a second node according to an embodiment of the present application is shown;

[0092] Fig.14 The structural block diagram of the processing device in the third node according to an embodiment of the present application is illustrated. DETAILED DESCRIPTION

[0093] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be arbitrarily combined with each other.

[0094] Example 1

[0095] Embodiment 1 illustrates a transmission flow chart of a first node according to an embodiment of the present application, as shown in the attached Figure 1 shown.

[0096] In Example 1, the first node 100 receives a first signaling through an air interface in step 101; sends a first wireless signal as a response to receiving the first signaling in step 102, and the first wireless signal includes a second signaling; receives a second data unit set through the air interface in step 103; wherein the second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0097] As an embodiment, the air interface includes an interface for wireless signal transmission.

[0098] As an embodiment, the air interface includes an interface for wireless signaling transmission.

[0099] As an embodiment, the air interface includes a PC5 interface.

[0100] As an embodiment, the air interface includes a Uu interface.

[0101] As an embodiment, transmitting through the air interface includes: receiving through the air interface and sending through the air interface.

[0102] As an embodiment, transmitting through the air interface includes: transmitting through SL.

[0103] As an embodiment, transmitting through the air interface includes: transmitting through DL (DownLink).

[0104] As an embodiment, transmitting through the air interface includes: transmitting through UL (UpLink).

[0105] As an embodiment, the transmission through the air interface includes: the physical transmission channel is PSSCH (Physical Sidelink Shared Channel).

[0106] As an embodiment, the transmission through the air interface includes: the physical transmission channel is PDSCH (Physical Downlink Shared Channel, physical downlink shared channel).

[0107] As an embodiment, the transmission through the air interface includes: the logical transmission channel is STCH (Sidelink Traffic CHannel, side link traffic channel).

[0108] As an embodiment, the transmission through the air interface includes: the logical transmission channel is DTCH (Dedicated Traffic Channel).

[0109] As an embodiment, the transmission through the air interface includes: the logical transmission channel is SCCH (Sidelink Control Channel).

[0110] As an embodiment, the transmission through the air interface includes: the logical transmission channel is a DCCH (Dedicated Control CHannel, dedicated control channel).

[0111] As an embodiment, the transmission through the air interface includes: the radio bearer is SRB (Signaling Radio Bear).

[0112] As an embodiment, the transmission through the air interface includes: the radio bearer is a DRB (Data Radio Bearer).

[0113] As an embodiment, the transmission through the air interface includes: the radio bearer is SL-SRB (Side Link Signaling Radio Bearer).

[0114] As an embodiment, the time-frequency resources of the air interface belong to the V2X resource pool.

[0115] As an embodiment, the time-frequency resources of the air interface are reserved for secondary link transmission.

[0116] As an embodiment, the time-frequency resources of the air interface are reserved for downlink transmission.

[0117] As an embodiment, the time-frequency resources of the air interface are reserved for uplink transmission.

[0118] As an embodiment, the transmission of the first wireless signal, the second wireless signal, the third wireless signal set, the fourth wireless signal set, the fifth wireless signal, and the sixth wireless signal in the present application are respectively transmitted through the air interface.

[0119] As an embodiment, the first signaling, the second signaling, the first information, the second information and the third information in the present application are respectively transmitted through the air interface.

[0120] As an embodiment, the sender of the first signaling is the second node.

[0121] As an embodiment, the first signaling indicates that the second node has no subsequent data packet to send for the first radio bearer.

[0122] As an embodiment, the first signaling instructs the second node to send the last data packet for the first radio bearer.

[0123] As an embodiment, the first signaling includes an End Marker message.

[0124] As an embodiment, the first signaling is generated in the RLC (Radio Link Control, wireless link layer control protocol) sublayer.

[0125] As an embodiment, the first signaling is generated in a MAC (Media Access Control) sublayer.

[0126] As an embodiment, a higher layer of the second node instructs generation of the first signaling.

[0127] As a sub-embodiment of the above embodiment, the higher layer is an adaptation sublayer.

[0128] As a sub-embodiment of the above embodiment, the higher layer is the RLC sublayer.

[0129] As an embodiment, in response to receiving the first signaling, a first wireless signal is sent, and the first wireless signal includes the second signaling.

[0130] As an embodiment, the RLC entity of the first node receives the first signaling, and the first signaling triggers the RLC entity to generate the second signaling.

[0131] As an embodiment, the RLC entity of the first node receives the first signaling, and the first signaling is used to instruct a PDCP (Packet Data Convergence Protocol) entity of the first node to generate the second signaling.

[0132] As an embodiment, the MAC entity of the first node receives the first signaling, and the first signaling is used to instruct the RLC entity of the first node to generate the second signaling.

[0133] As an embodiment, the MAC entity of the first node receives the first signaling, and the first signaling is used to instruct the PDCP entity of the first node to generate the second signaling.

[0134] As an embodiment, the first wireless signal includes the second signaling; the target recipient of the second signaling is a third node.

[0135] As an embodiment, the target recipient of a signaling refers to: receiving the signaling through an air interface and no longer forwarding the signaling through the air interface.

[0136] As an embodiment, a target recipient of a signaling refers to: the signaling is received through an air interface, and the signaling is terminated at the recipient.

[0137] As an embodiment, the target recipient of a signaling refers to: receiving the signaling through the air interface and passing the data carried in the signaling to the RLC sublayer.

[0138] As an embodiment, the target recipient of a signaling refers to: receiving the signaling through the air interface and delivering the data carried in the signaling to the PDCP sublayer.

[0139] As an embodiment, a target receiver of a signaling refers to: receiving the signaling through an air interface, and delivering the data carried in the signaling to NAS (Non-Access Stratum).

[0140] As an embodiment, the second signaling is transmitted via PSSCH.

[0141] As an embodiment, the second signaling is transmitted via DRB.

[0142] As an embodiment, the receiver of the first wireless signal is a fourth node.

[0143] As an embodiment, the fourth node receives the first wireless signal, recovers the second signaling from the first wireless signal, and the second signaling is used to generate the second wireless signal for transmission; the recipient of the second wireless signal is the third node.

[0144] As an embodiment, the sender of the first signaling and the receiver of the first wireless signal are not the same communication device.

[0145] As an embodiment, the sender of the first signaling and the receiver of the first wireless signal have different identities.

[0146] As an embodiment, the MAC PDU (Protocol Data Unit) of the first signaling includes some bits of the identity of the sender of the first signaling; and the SCI (Sidelink Control Information) that schedules the first signaling includes the remaining bits of the identity of the sender of the first signaling.

[0147] As a sub-embodiment of the above embodiment, the partial bits include the upper 16 bits of the identity of the sender of the first signaling; and the remaining partial bits include the lower 8 bits of the identity of the sender of the first signaling.

[0148] As an embodiment, the MAC PDU of the first wireless signal includes some bits of the identity of the receiver of the first wireless signal; and the SCI for scheduling the first wireless signal includes the remaining bits of the identity of the receiver of the first wireless signal.

[0149] As a sub-embodiment of the above embodiment, the partial bits include the upper 8 bits of the identity of the receiver of the first wireless signal; the remaining partial bits include the lower 16 bits of the identity of the receiver of the first wireless signal.

[0150] As an embodiment, the SCI includes a first-stage SCI format and a second-stage SCI format.

[0151] As an embodiment, the SCI indicates at least one of the time domain resources or the frequency domain resources of the physical layer channel occupied by the MAC PDU including the first signaling.

[0152] As an embodiment, the SCI includes at least one of MCS (Modulation and Coding Status), RV (Redundancy Version), NDI (New Data Indicator) or HARQ process number.

[0153] As an embodiment, the phrase that the second signaling indicates that the first set of data units has not been received includes: the first set of data units is lost.

[0154] As an embodiment, the second signaling is used to indicate the retransmission of the first set of data units.

[0155] As an embodiment, the first data unit set includes at least one data unit.

[0156] As an embodiment, the second signaling is used by the third node to determine the second data unit set; the second data unit set includes the first data unit set.

[0157] As an embodiment, the first data unit set and the second data unit set respectively include RLC SDU(s) (Service Data Unit).

[0158] As an embodiment, the first data unit set and the second data unit set respectively include PDCP SDU(s).

[0159] As an embodiment, the first data unit set and the second data unit set respectively include RLC SDU segment(s).

[0160] As an embodiment, the first data unit set and the second data unit set respectively include RLC PDU(s).

[0161] As an embodiment, the first data unit set and the second data unit set respectively include PDCP PDU(s).

[0162] As an embodiment, the second data unit set is transmitted via PSSCH.

[0163] As an embodiment, the second data unit set is transmitted via DRB.

[0164] As an embodiment, the second data unit set includes at least one data unit.

[0165] As an embodiment, the second data unit set is generated at the third node, and is received at the fourth node after being transmitted via the air interface. The fourth node forwards the second data unit set, and is received at the first node via the air interface.

[0166] As an embodiment, both the first data unit set and the second data unit set are transmitted via a first wireless bearer.

[0167] As an embodiment, the first radio bearer is used to transmit services to which the first data unit set and the second data unit set belong.

[0168] As an embodiment, the first radio bearer is used to transmit a PC5 QoS (Quality of Service) flow to which the first data unit set and the second data unit set belong.

[0169] As an embodiment, the first wireless bearer is a DRB.

[0170] As an embodiment, the first wireless bearer is a SL-SRB.

[0171] As an embodiment, the first wireless bearer is an RLC bearer.

[0172] As an embodiment, the first node and the third node respectively maintain a PDCP entity of the first radio bearer.

[0173] As an embodiment, the first node and the third node respectively maintain an RLC entity of the first radio bearer.

[0174] As an embodiment, the first radio bearer is an AM (Acknowledged Mode) DRB.

[0175] As an embodiment, the RLC entity of the first radio bearer is an AM RLC entity.

[0176] As an embodiment, the LCID (Logical Channel Identifier) ​​corresponding to any data unit in the first data unit set is the same as the LCID corresponding to any data unit in the second data unit set.

[0177] Example 2

[0178] Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in the attached Figure 2 shown. Figure 2 The V2X communication architecture under the NR 5G, LTE (Long-Term Evolution) and LTE-A (Long-Term Evolution Advanced) system architecture is described. The NR 5G or LTE or LTE-A network architecture may be referred to as 5GS (5G System) / EPS (Evolved Packet System) or some other appropriate terminology.

[0179] The V2X communication architecture of embodiment 2 includes UE (User Equipment) 201, UE 241, 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, ProSe function 250 and ProSe application server 230. The V2X communication architecture can be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, the V2X communication architecture provides packet switching services, but technicians in the field will easily understand that the various concepts presented throughout this application can be extended to networks that provide circuit switching 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 terminations toward UE 201. gNB 203 can be connected to other gNBs 204 via an Xn interface (e.g., backhaul). gNB203 may also be referred to as a base station, a base transceiver station, a wireless base station, a wireless transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (transmitting receiving node) or some other suitable term. In an NTN network, gNB203 may be a satellite, an aircraft, or a ground base station relayed by a satellite. gNB203 provides an access point to 5GC / EPC210 for UE201. Examples of UE201 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband Internet of Things devices, machine type communication devices, land vehicles, cars, vehicle-mounted devices, vehicle-mounted communication units, wearable devices, or any other similar functional devices. The UE 201 may also be referred to by those skilled in the art as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term. The gNB 203 is connected to the 5GC / EPC 210 via an S1 / NG interface.5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF213. MME / AMF / SMF211 is a control node that handles signaling between UE201 and 5GC / EPC210. ​​In general, MME / AMF / SMF211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF212, which itself is connected to P-GW / UPF213. P-GW provides UE IP address allocation and other functions. P-GW / UPF213 is connected to Internet services. Internet services include Internet protocol services corresponding to operators, which may specifically include Internet, intranet, IMS (IP Multimedia Subsystem) and PS (Packet Switching) streaming services. The ProSe function 250 is a logical function for network-related behaviors required for proximity services (ProSe, Proximity-based Service); including DPF (Direct Provisioning Function, Direct Provisioning Function), Direct Discovery Name Management Function, EPC-level Discovery ProSe Function, etc. The ProSe application server 230 has the functions of storing EPC ProSe user identities, mapping between application layer user identities and EPC ProSe user identities, and allocating ProSe restricted code suffix pools.

[0180] As an embodiment, the NR node B, the UE201 and the UE241 correspond to the first node, the second node and the third node in the present application respectively.

[0181] As an embodiment, the UE201 corresponds to the first node in the present application, and the UE241 corresponds to the second node in the present application.

[0182] As an embodiment, the UE201 corresponds to the second node in the present application, and the UE241 corresponds to the third node in the present application.

[0183] As an embodiment, the UE201 and the UE241 respectively support transmission in SL.

[0184] As an embodiment, the UE201 and the UE241 support the PC5 interface respectively.

[0185] As an embodiment, the UE201 and the UE241 respectively support Internet of Vehicles.

[0186] As an embodiment, the UE201 and the UE241 support V2X services respectively.

[0187] As an embodiment, the UE201 and the UE241 support D2D services respectively.

[0188] As an embodiment, the UE201 and the UE241 respectively support public safety services.

[0189] As an embodiment, the UE 201 supports relay transmission.

[0190] As an embodiment, the UE 241 supports relay transmission.

[0191] As an embodiment, the gNB203 supports the Internet of Vehicles.

[0192] As an embodiment, the gNB203 supports V2X services.

[0193] As an embodiment, the gNB203 supports D2D services.

[0194] As an embodiment, the gNB203 supports public safety services.

[0195] As an embodiment, the gNB203 is a macro cell base station.

[0196] As an embodiment, the gNB203 is a micro cell base station.

[0197] As an embodiment, the gNB203 is a pico cell base station.

[0198] As an embodiment, the gNB203 is a home base station (Femtocell).

[0199] As an embodiment, the gNB203 is a base station device that supports large delay difference.

[0200] As an embodiment, the gNB203 is a flying platform device.

[0201] As an embodiment, the gNB203 is a satellite device.

[0202] As an embodiment, the wireless link from the UE201 to the gNB203 is an uplink.

[0203] As an embodiment, the wireless link from the gNB203 to the UE201 is a downlink.

[0204] As an embodiment, the wireless link between the UE201 and the UE241 corresponds to the secondary link in this application.

[0205] As an embodiment, the UE201 and the gNB203 are connected via a Uu interface.

[0206] As an embodiment, the UE201 and the UE241 are connected via a PC5 reference point (Reference Point).

[0207] As an embodiment, the ProSe function 250 is connected to the UE 201 and the UE 241 via a PC3 reference point respectively.

[0208] As an embodiment, the ProSe function 250 is connected to the ProSe application server 230 via a PC2 reference point.

[0209] As an embodiment, the ProSe application server 230 is connected to the ProSe application of the UE 201 and the ProSe application of the UE 241 through a PC1 reference point respectively.

[0210] Example 3

[0211] Embodiment 3 illustrates a schematic diagram of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application, as shown in the attached figure. Figure 3 shown. Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, Figure 3The radio protocol architecture of the control plane 300 of the UE and gNB is shown in 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. The L1 layer will be referred to as PHY 301 in this article. Layer 2 (L2 layer) 305 is above PHY 301 and is responsible for the link between the UE and the gNB through PHY 301. The 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 gNB on the network side. The PDCP sublayer 304 provides data encryption and integrity protection. The PDCP sublayer 304 also provides support for inter-zone mobility of UEs between gNBs. The RLC sublayer 303 provides segmentation and reassembly of data packets, and retransmission of lost data packets through ARQ. The RLC sublayer 303 also provides duplicate data packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) in a cell between UEs. The MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. Although not shown in the figure, a V2X layer may also be provided above the RRC sublayer 306 in the control plane 300 of the UE. The V2X layer is responsible for generating a PC5 QoS parameter group and QoS rules based on the received service data or service request, generating a PC5 QoS flow corresponding to the PC5QoS parameter group, and sending the PC5 QoS flow identifier and the corresponding PC5QoS parameter group to the AS (Access Stratum) layer for the AS layer to perform QoS processing on the data packets belonging to the PC5 QoS flow identifier; the V2X layer also includes a PC5-S signaling protocol (PC5-Signaling Protocol) sublayer, and the V2X layer is responsible for indicating to the AS layer whether each transmission is a PC5-S transmission or a V2X service data transmission.The wireless protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). The wireless protocol architecture in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce wireless transmission overhead. The L2 layer 355 in the user plane 350 also includes a SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping between QoS (Quality of Service) flows and data radio bearers (DRBs) to support the diversity of services. The wireless protocol architecture of the UE in the user plane 350 may include, at the L2 layer, a SDAP sublayer 356, a PDCP sublayer 354, a portion of or all of the protocol sublayers of the RLC sublayer 353 and the MAC sublayer 352. Although not shown, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., an IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., a remote UE, a server, etc.).

[0212] As an example, Figure 3 The entities of multiple sublayers of the control plane form SRB in the vertical direction.

[0213] As an example, Figure 3 The entities of multiple sublayers of the control plane form a DRB in the vertical direction.

[0214] As an example, Figure 3 The wireless protocol architecture in is applicable to the first node in this application.

[0215] As an example, Figure 3 The wireless protocol architecture in is applicable to the third node in this application.

[0216] As an embodiment, the first signaling in the present application is generated in the RLC303 or RLC353.

[0217] As an embodiment, the first signaling in the present application is generated in the PDCP304 or PDCP354.

[0218] As an embodiment, the second signaling in the present application is generated in the RLC303 or RLC353.

[0219] As an embodiment, the second signaling in the present application is generated in the PDCP304 or PDCP354.

[0220] As an embodiment, the first wireless signal in the present application is generated by the PHY301 or PHY351.

[0221] As an embodiment, the second wireless signal in the present application is generated by the PHY301 or PHY351.

[0222] As an embodiment, the second data unit set in the present application is generated in the RLC303 or RLC353.

[0223] As an embodiment, the second data unit set in the present application is generated in the PDCP304 or PDCP354.

[0224] As an embodiment, the fifth data unit set in the present application is generated in the RLC303 or RLC353.

[0225] As an embodiment, the fifth data unit set in the present application is generated in the PDCP304 or PDCP354.

[0226] As an embodiment, the first information in the present application is generated in the RRC306.

[0227] As an embodiment, the third wireless signal set in the present application is generated by the PHY301 or PHY351.

[0228] As an embodiment, the fourth wireless signal set in the present application is generated by the PHY301 or PHY351.

[0229] As an embodiment, the second information in the present application is generated in the RRC306.

[0230] As an embodiment, the second information in the present application is generated in the PC5-S.

[0231] As an embodiment, the third information in the present application is generated in the RRC306.

[0232] As an embodiment, the third information in the present application is generated by the PC5-S.

[0233] As an embodiment, the L2 layer 305 or 355 belongs to a higher layer.

[0234] As an embodiment, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0235] As an embodiment, the V2X layer belongs to NAS (Non-Access Stratum).

[0236] As an embodiment, the data plane of the first node in the present application and the second node in the present application only needs to maintain the connection between the PHY layer and the MAC sublayer.

[0237] As an embodiment, the data plane of the second node in the present application and the third node in the present application only needs to maintain the connection between the PHY layer and the MAC sublayer.

[0238] As an embodiment, the data plane of the first node in the present application and the second node in the present application only needs to maintain the connection between the PHY layer, the MAC sublayer and the RLC sublayer.

[0239] As an embodiment, the data plane of the second node in the present application and the third node in the present application only needs to maintain the connection between the PHY layer, the MAC sublayer and the RLC sublayer.

[0240] Example 4

[0241] Embodiment 4 illustrates a hardware module schematic diagram of a communication device according to an embodiment of the present application, as shown in the attached Figure 4 shown. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

[0242] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter / receiver 454 and an antenna 452.

[0243] The second communication device 410 includes a controller / processor 475, a memory 476, a data source 477, a receive processor 470, a transmit processor 416, a multi-antenna receive processor 472, a multi-antenna transmit processor 471, a transmitter / receiver 418 and an antenna 420.

[0244] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, the upper layer data packets from the core network or the upper layer data packets from the data source 477 are provided to the controller / processor 475. The core network and the data source 477 represent all the protocol layers above the L2 layer. The controller / processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first 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 first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for the retransmission of lost packets and signaling to the first 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). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. The multi-antenna transmit processor 471 then performs a transmit analog precoding / beamforming operation on the time-domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0245] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream and provides it to the receiving processor 456. The receiving processor 456 and the multi-antenna receiving processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiving processor 458 performs a receiving analog precoding / beamforming operation on the baseband multi-carrier symbol stream from the receiver 454. The receiving processor 456 uses a fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receiving analog precoding / beamforming operation 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 receiving processor 456, wherein the reference signal will be used for channel estimation, and the data signal is recovered after multi-antenna detection in the multi-antenna receiving processor 458 to any spatial stream destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in the receiving processor 456, and soft decisions are generated. The receiving processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on 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 the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program codes and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover the upper layer data packets from the second communication device 410. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to the L3 for L3 processing.

[0246] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, the upper layer data packets are provided to the controller / processor 459 using the data source 467. The data source 467 represents all the protocol layers above the L2 layer. Similar to the transmission function at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels, and implements L2 layer functions for user plane and control plane. The controller / processor 459 is also responsible for the retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Then, the transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream, which is then provided to different antennas 452 via the transmitter 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream, and then provides it to the antenna 452.

[0247] In the transmission from the first communication device 450 to the second communication device 410, the functions at the second communication device 410 are similar to the reception functions at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna reception processor 472 and the reception processor 470. The reception processor 470 and the multi-antenna reception processor 472 jointly implement the functions of the L1 layer. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 can be associated with a memory 476 that stores program codes and data. The memory 476 can be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover the upper layer data packets from the first communication device 450. The upper layer data packets from the controller / processor 475 may be provided to the core network or all protocol layers above the L2 layer, and various control signals may also be provided to the core network or L3 for L3 processing.

[0248] As an embodiment, the first communication device 450 apparatus 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 together with the at least one processor, and the first communication device 450 apparatus at least: receives a first signaling through an air interface; sends a first wireless signal as a response to receiving the first signaling, the first wireless signal including a second signaling; receives a second data unit set through an air interface; wherein the second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set.

[0249] As an embodiment, the first communication device 450 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates actions when executed by at least one processor, and the actions include: receiving a first signaling through an air interface; sending a first wireless signal as a response to receiving the first signaling, wherein the first wireless signal includes a second signaling; receiving a second data unit set through an air interface; wherein the second signaling indicates that the first data unit set has not yet been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0250] As an embodiment, the second communication device 410 device includes: at least one processor and at least one memory, the at least one memory includes computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 410 device at least: sends a first signaling through an air interface; wherein a first wireless signal is received, the first wireless signal includes a second signaling, and the second signaling is used to generate a second wireless signal; the second wireless signal is sent; a second data unit set is received through the air interface; the second signaling indicates that the first data unit set has not been received, and the first data unit set and the second data unit set are both transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the second node is not co-located with the recipient of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set.

[0251] As an embodiment, the second communication device 410 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one processor, and the action includes: sending a first signaling through an air interface; wherein a first wireless signal is received, the first wireless signal includes a second signaling, and the second signaling is used to generate a second wireless signal; the second wireless signal is sent; a second data unit set is received through the air interface; the second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the second node is not co-located with a recipient of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set.

[0252] As an embodiment, the second communication device 410 device includes: at least one processor and at least one memory, the at least one memory includes computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 410 device at least: receives a second wireless signal, the second wireless signal includes a second signaling; sends a second data unit set through an air interface; wherein the second signaling indicates that the first data unit set has not been received, and the first data unit set and the second data unit set are both transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the first signaling is sent; the sender of the first signaling is not co-located with the sender of the second wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set.

[0253] As an embodiment, the second communication device 410 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates actions when executed by at least one processor, and the actions include: receiving a second wireless signal, wherein the second wireless signal includes a second signaling; sending a second data unit set through an air interface; wherein the second signaling indicates that the first data unit set has not yet been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the first signaling is sent; the sender of the first signaling is not co-located with the sender of the second wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0254] As an embodiment, the first communication device 450 corresponds to the first node in the present application; the second communication device 410 corresponds to the second node in the present application.

[0255] As an embodiment, the first communication device 450 corresponds to the second node in the present application; the second communication device 410 corresponds to the third node in the present application.

[0256] As an embodiment, the first communication device 450 is a UE.

[0257] As an embodiment, the first communication device 450 is a user equipment supporting V2X.

[0258] As an embodiment, the first communication device 450 is a user equipment supporting D2D.

[0259] As an embodiment, the first communication device 450 is a vehicle-mounted device.

[0260] As an embodiment, the second communication device 410 is a UE.

[0261] As an embodiment, the second communication device 410 is a user equipment supporting V2X.

[0262] As an embodiment, the second communication device 410 is a user equipment supporting D2D.

[0263] As an embodiment, the second communication device 410 is a vehicle-mounted device.

[0264] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the first signaling in the present application.

[0265] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456 or the controller / processor 459 is used to receive the first signaling in the present application.

[0266] As an embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468 or the controller / processor 459 is used to send the second signaling in the present application.

[0267] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470 or the controller / processor 475 is used to receive the second signaling in the present application.

[0268] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is sent the second data unit set in the present application.

[0269] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the second data unit set in the present application.

[0270] As an embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468 or the controller / processor 459 is used to send the first information in the present application.

[0271] As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna reception processor 472, the reception processor 470 or the controller / processor 475 is used to receive the first information in the present application.

[0272] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the third data unit set in the present application.

[0273] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the third data unit set in the present application.

[0274] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the second information in the present application.

[0275] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the second information in the present application.

[0276] As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller / processor 475 is used to send the third information in the present application.

[0277] As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna reception processor 458, the reception processor 456 or the controller / processor 459 is used to receive the third message in the present application.

[0278] Example 5

[0279] Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in the attached Figure 5 As shown in the attached Figure 5 In the example, the first node U1 and the second node U2 communicate via the secondary link interface, and the second node U2 and the third node U3 communicate via the secondary link. It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in this application. As shown in the figure, the steps in the dotted box F0 and the dotted box F1 are optional.

[0280] for The first node U1 In step S11, the second information is received through the air interface; in step S12, the third information is received through the air interface; in step S13, the first information is sent through the air interface; in step S14, a third data unit set is received through the air interface; in step S15, the first signaling is received through the air interface; in step S16, the second signaling is sent through the air interface; in step S17, a second data unit set is received through the air interface.

[0281] for The second node U2 , in step S21, a fifth wireless signal is received, and second information is recovered from the fifth wireless signal; in step S22, the second information is used to generate a sixth wireless signal, and the sixth wireless signal is sent; in step S23, a third wireless signal set is received, and a fourth data unit set is recovered from the third wireless signal set; in step S24, first information is received through an air interface; in step S25, the fourth data unit set is used to generate a fourth wireless signal set, and the fourth wireless signal set is sent; in step S26, a first signaling is sent through an air interface.

[0282] for The third node U3 In step S31, the second information is sent through the air interface; in step S32, the fifth data unit set is sent through the air interface; in step S33, the third information is sent through the air interface; in step S34, the second signaling is received through the air interface; in step S35, the second data unit set is sent through the air interface.

[0283] It should be noted that although Figure 5 The fourth node is not shown in the figure, and the third information, the second signaling and the second data unit set are respectively forwarded through the fourth node.

[0284] As an embodiment, the third node sends a fifth wireless signal, and the fifth wireless signal includes the second information; the second node receives the fifth wireless signal, recovers the second information from the fifth wireless signal, and the second information is used to generate the sixth wireless signal for transmission; the first node receives the sixth wireless signal, and recovers the second information from the sixth wireless signal.

[0285] As an embodiment, the second information includes RRC (Radio Resource Control) information.

[0286] As an embodiment, the second information includes PC5-RRC information.

[0287] As an embodiment, the second information includes all or part of an IE (Information Element) in an RRC information.

[0288] As an embodiment, the second information includes all or part of a field in an IE in an RRC information.

[0289] As an embodiment, the second information includes RRCReconfigurationSidelink (RRC reconfiguration of sidelink).

[0290] As an embodiment, the second information includes SL-ConfigDedicatedNR (Secondary Link-New Air Interface Dedicated Configuration).

[0291] As an embodiment, the second information includes PC5-S (PC5-Signaling) information.

[0292] As an embodiment, in response to receiving the second information, the first node sends fourth information via an air interface, and the fourth information includes RRCReconfigurationCompleteSidelink (RRC reconfiguration of side link completed); the third node receives the fourth information via the air interface.

[0293] As an embodiment, the second information includes an RRC information including a first identity list and a first configuration.

[0294] As an embodiment, the first identity list is a RelayList field in an RRC information included in the second information.

[0295] As an embodiment, the first identity list is an SL-RelayList (secondary link relay list) field in an RRC information included in the second information.

[0296] As an embodiment, the first identity list includes Q identities, and Q is no greater than 64.

[0297] As an embodiment, the number of bits included in any one of the Q identities is a positive integer multiple of 8.

[0298] As an embodiment, the number of bits included in any one of the Q identities is 8.

[0299] As an embodiment, the number of bits included in any one of the Q identities is 24.

[0300] As an embodiment, any one of the Q identities is a link layer identity.

[0301] As an embodiment, any one of the Q identities is a layer 2 identity.

[0302] As an embodiment, the Q identities respectively indicate Q relay nodes.

[0303] As an embodiment, any one of the Q identities indicates a node.

[0304] As an embodiment, the receiver of the fifth wireless signal includes a node identified by one of the Q identities; the fifth wireless signal includes partial bits of the one identity; and the scheduling information of the fifth wireless signal includes the remaining partial bits of the one identity.

[0305] As an embodiment, the scheduling information of the fifth wireless signal is included in physical layer signaling.

[0306] As an embodiment, the scheduling information of the fifth wireless signal includes SCI.

[0307] As an embodiment, the first configuration is a field in the second information.

[0308] As an embodiment, the first configuration is the SLRB-Config (Secondary Link Radio Bearer Configuration) field in the second information.

[0309] As an embodiment, the first configuration is the slrb-ConfigToAddModList (secondary link radio bearer - new added modified configuration list) field in the second information.

[0310] As an embodiment, the first parameter set includes at least one of SDAP (Service Data Adaptation Protocol) configuration parameters, PDCP (Packet Data Convergence Protocol) configuration parameters, RLC (Radio Link Control) configuration parameters or MAC (Medium Access Control) configuration parameters.

[0311] As an embodiment, the first parameter set is used to configure the first radio bearer.

[0312] As an embodiment, the first parameter set includes the LCID corresponding to the first radio bearer.

[0313] As an embodiment, the first parameter set includes a first radio bearer identifier (bearer ID), and the first radio bearer identifier indicates the first radio bearer.

[0314] As an embodiment, the first bearer identifier indicates a peer-to-peer wireless bearer.

[0315] As an embodiment, the first radio bearer is bi-directional.

[0316] As an embodiment, the LCID corresponding to the first radio bearer is used to determine a higher layer entity that processes a data unit belonging to the first radio bearer.

[0317] As an embodiment, the LCID corresponding to the first radio bearer is used to determine the RLC entity that processes the data unit belonging to the first radio bearer.

[0318] As an embodiment, the first parameter set is used to configure a higher layer entity corresponding to the first radio bearer.

[0319] As an embodiment, the higher layer entity corresponding to the first radio bearer includes at least one of an SDAP entity, a PDCP entity, an RLC entity or a MAC entity.

[0320] As an embodiment, the first data unit set and the second data unit set are processed at the higher layer corresponding to the first radio bearer.

[0321] As an embodiment, the third node sends a third wireless signal set, and the third wireless signal set includes the fifth data unit set; the second node receives the third wireless signal set, recovers a fourth data unit set from the third wireless signal set, and the fourth data unit set is used to generate the fourth wireless signal set for sending.

[0322] As an embodiment, the fourth data unit set includes at least one data unit.

[0323] As an embodiment, the fifth data unit set includes the fourth data unit set.

[0324] As an embodiment, the sender of the fourth wireless signal set is identified by one of the Q identities.

[0325] As an embodiment, the sender of the fourth wireless signal set and the sender of the sixth wireless signal are co-located.

[0326] As an embodiment, the sender of the fourth wireless signal set and the receiver of the first wireless signal are not co-located.

[0327] As an embodiment, the third node sends the third information through an air interface; the third information is received by the first node after being forwarded by the fourth node over the air interface.

[0328] As an embodiment, the fourth node and the sender of the first signaling are not co-located.

[0329] As an embodiment, the third information includes RRC information.

[0330] As an embodiment, the third information includes PC5-RRC information.

[0331] As an embodiment, the third information includes all or part of the IE in an RRC information.

[0332] As an embodiment, the third information includes all or part of the fields in an IE in an RRC information.

[0333] As an embodiment, the third information includes RRCReconfigurationSidelink.

[0334] As an embodiment, the third information includes PC5-S (PC5-Signaling) information.

[0335] As an embodiment, in response to receiving the third information, the first node sends fifth information, and the fifth information includes RRCReconfigurationCompleteSidelink.

[0336] As an embodiment, the third information includes a RRC information including a RelayList field; the RelayList includes at least one identity; the RelayList does not include the first identity.

[0337] As a sub-embodiment of the above embodiment, the second identity list includes the identities included in the RelayList.

[0338] As an embodiment, the third information includes an RRC information including a FailRelayList (failed relay list) field; the FailRelayList includes at least the first identity.

[0339] As a sub-embodiment of the above embodiment, the second identity list includes identities in the first identity list except identities included in the FailRelayList.

[0340] As an embodiment, the second identity list includes a positive integer number of identities not greater than 64.

[0341] As an embodiment, in response to receiving the third information, the first node updates the first identity list to include identities included in the second identity list and the first identity.

[0342] As an embodiment, the third information indicates that the first wireless link fails; and one of the two nodes linking the first wireless link is identified by the first identity.

[0343] As an embodiment, the third information does not trigger the generation of the second signaling.

[0344] As an embodiment, an identity in the second identity list is used to identify the receiver of the first wireless signal.

[0345] As an embodiment, the first node sends first information, and the first information indicates that the first link fails.

[0346] As an embodiment, the recipient of the first information includes a node identified by the first identity.

[0347] As an embodiment, the first information includes RRC information.

[0348] As an embodiment, the first information includes PC5-RRC information.

[0349] As an embodiment, the first information includes all or part of the IE in an RRC information.

[0350] As an embodiment, the first information includes all or part of the fields in an IE in an RRC information.

[0351] As an embodiment, the first information includes RRCReconfigurationSidelink.

[0352] As an embodiment, the first information includes the slrb-ConfigToReleaseList (secondary link radio bearer - release configuration list) field in the PC5-RRC information.

[0353] As an embodiment, in response to receiving the first information, the node identified by the first identity sends sixth information, and the sixth information includes RRCReconfigurationCompleteSidelink.

[0354] As an embodiment, the first node receives the fourth wireless signal set and recovers the third data unit set from the fourth wireless signal set.

[0355] As an embodiment, the third data unit set includes 0 data units.

[0356] As an embodiment, the third data unit set includes at least one data unit, and any data unit in the third data unit set belongs to the fourth data unit set.

[0357] As an embodiment, the third data unit set and the fifth data unit set are different.

[0358] As an embodiment, the number of data units in the third data unit set is less than the number of data units in the fifth data unit set.

[0359] As an embodiment, the fifth data unit set includes at least one data unit; and at least one data unit in the fifth data unit set does not belong to the third data unit set.

[0360] As an embodiment, the fourth wireless signal set includes at least two wireless signals, and any two wireless signals in the fourth wireless signal set include different MAC SDUs.

[0361] As an embodiment, the fourth wireless signal set includes at least two wireless signals, and at least two wireless signals in the fourth wireless signal set include the same MAC SDU.

[0362] As an embodiment, the first data unit set includes a data unit set in the fifth data unit set except the third data unit set.

[0363] As an embodiment, any data unit in the third data unit set does not belong to the first data unit set.

[0364] As an embodiment, the first data unit set includes data units that are not successfully received by the RLC sublayer of the first node within a first window.

[0365] As an embodiment, the first data unit set includes data units that are not successfully received by the PDCP sublayer of the first node within the first window.

[0366] As an embodiment, the data unit set cached in the first window includes the third data unit set; data units whose sequence numbers are not carried by any data unit in the data unit set cached in the first window constitute the first data unit set.

[0367] As an embodiment, 5 data units are cached in the first window, and the sequence numbers they carry are 3, 5, 6, 7, and 9 respectively; the first data unit set includes data units with sequence numbers 4 and 8 respectively.

[0368] As an embodiment, the sequence number identifies a PDCP SDU at the PDCP sublayer.

[0369] As an embodiment, the sequence number identifies an RLC SDU at the RLC sublayer.

[0370] As an embodiment, the PDCP entity of the first node determines the first data unit set according to the method described in Section 5.2 and Section 5.4 of the 38.323 protocol of the 3GPP standard.

[0371] As an embodiment, the PDCP entity of the first node determines the first data unit set according to the method described in Section 5.1 and Section 5.3 of Protocol 36.323 of the 3GPP standard.

[0372] As an embodiment, the RLC entity of the first node determines the first data unit set according to the method described in Section 5.2.3.2 and Section 5.3.4 of Protocol 38.322 of the 3GPP standard.

[0373] As an embodiment, the RLC entity of the first node determines the first data unit set according to the method described in Section 5.1.3.2 and Section 5.2.3 of Protocol 36.322 of the 3GPP standard.

[0374] As an embodiment, the first window size is configured by a network.

[0375] As an embodiment, the first window size indicates a reordering window size.

[0376] As an embodiment, the first window size indicates a receiving window size.

[0377] As an embodiment, the first signaling and the data unit with the largest sequence number in the fourth data unit set are multiplexed into one MAC PDU for transmission; and the third data unit set includes the data unit with the largest sequence number in the fourth data unit set.

[0378] As an embodiment, the first signaling is sent after the data unit with the largest sequence number in the fourth data unit set is sent.

[0379] As a sub-embodiment of the above embodiment, the phrase "sending completed" includes: the data unit is successfully received.

[0380] As a sub-embodiment of the above embodiment, the phrase "complete sending" includes: the data unit reaches a maximum number of retransmissions.

[0381] As an embodiment, the reception time of the first signaling is later than the reception time of any data unit in the third data unit set.

[0382] As an embodiment, the second node sends the first signaling; in response to sending the first signaling, the second node releases the storage space of the fourth data unit set.

[0383] As an embodiment, the first signaling is received via an air interface; in response to receiving the first signaling, the first node clears the first identity from the first identity list.

[0384] As an embodiment, physical layer signaling is monitored through a secondary link, and the physical layer signaling includes physical layer signaling corresponding to each identity in the first identity list.

[0385] As an embodiment, the physical layer signaling indicates the time-frequency resources occupied by the scheduled physical layer channel and the modulation and coding method adopted by the wireless signal transmitted on the physical layer channel.

[0386] As an embodiment, the phrase monitoring physical layer signaling via the side link includes: performing energy detection on the physical layer signaling via the side link.

[0387] As an embodiment, the phrase monitoring physical layer signaling via the side link includes: performing blind decoding on the physical layer signaling via the side link.

[0388] As an embodiment, the phrase monitoring physical layer signaling via a side link includes: performing blind decoding on the physical layer signaling via the side link and performing energy detection on the physical layer channel.

[0389] As an embodiment, the phrase monitoring physical layer signaling via a side link includes: performing blind decoding on the physical layer signaling via the side link and performing energy detection on a reference signal included in the physical layer channel.

[0390] As an embodiment, the phrase monitoring physical layer signaling through a side link includes: performing blind decoding on the physical layer signaling through the side link, performing energy detection on a reference signal included in the physical layer channel and performing decoding on the physical layer channel.

[0391] As an embodiment, the phrase monitoring physical layer signaling through the side link includes: performing CRC (Cyclic Redundancy Check) verification on the physical layer signaling through the side link.

[0392] As an embodiment, the physical layer signaling is detected when the physical layer signaling is successfully decoded.

[0393] As an embodiment, when the physical layer signaling passes CRC verification, the physical layer signaling is detected.

[0394] As an embodiment, when the detected physical layer signaling includes partial bits of any identity in the first identity list, channel decoding is performed on the physical layer channel scheduled by the detected physical layer signaling.

[0395] As an embodiment, when the detected physical layer signaling does not include some bits in any identity in the first identity list, channel decoding of the physical layer channel scheduled by the detected physical layer signaling is abandoned.

[0396] As a sub-embodiment of the above two embodiments, the partial bits include the lower 8 bits of any one of the identities.

[0397] As an embodiment, the behavior of abandoning channel decoding of the physical layer channel scheduled by the detected physical layer signaling includes: discarding the detected physical layer signaling.

[0398] As an embodiment, the behavior of abandoning channel decoding of the physical layer channel scheduled by the detected physical layer signaling includes: monitoring RSRP (Reference Signal Received Power) of the physical layer channel.

[0399] As an embodiment, the behavior of abandoning channel decoding of the physical layer channel scheduled by the detected physical layer signaling includes: performing a sensing operation on the physical layer channel for transmission resource selection when sending subsequent data units.

[0400] As an embodiment, the first identity identifies the sender of the first signaling.

[0401] As an embodiment, the partial bits include 8 bits.

[0402] As an embodiment, the partial bits include 16 bits.

[0403] Example 6

[0404] Embodiment 6 illustrates a format diagram of a MAC PDU according to an embodiment of the present application, as shown in the attached Figure 6 shown.

[0405] As an embodiment, the MAC PDU includes a SL-SCH (Sidelink Shared Channel) subheader and at least one MAC sub-PDU (subPDU), the MAC sub-PDU includes a MAC subheader and a MAC SDU; the MAC SDU includes an RLC subheader and at least one RLC SDU; the RLC SDU includes a PDCP subheader and a PDCP SDU; the V field included in the SL-SCH subheader is used to indicate the version number; the R field included in the SL-SCH subheader is reserved; the SRC field included in the SL-SCH subheader includes 16 bits, indicating the high 16 bits of the identity of the sender of the MAC PDU; the DST field included in the SL-SCH subheader includes 8 bits, indicating the high 8 bits of the identity of the receiver of the MAC PDU; the R field included in the MAC subheader is reserved; the F field included in the MAC subheader indicates the length of the L field included in the MAC subheader; the L field included in the MAC subheader indicates the number of bytes included in the MAC SDU.

[0406] As an embodiment, the one MAC PDU includes some bits of the identity of the sender of the one MAC PDU; and the SCI for scheduling the one MAC PDU includes the remaining bits of the identity of the sender of the one MAC PDU.

[0407] As a sub-embodiment of the above embodiment, the partial bits include the upper 16 bits of the identity of the sender of the MAC PDU; the remaining partial bits include the lower 8 bits of the identity of the sender of the MAC PDU; the upper 16 bits and the lower 8 bits constitute an identity.

[0408] As an embodiment, the one MAC PDU includes some bits of the identity of the receiver of the one MAC PDU; and the SCI for scheduling the one MAC PDU includes the remaining bits of the identity of the receiver of the one MAC PDU.

[0409] As a sub-embodiment of the above embodiment, the partial bits include the upper 8 bits of the identity of the receiver of the one MAC PDU; the remaining partial bits include the lower 16 bits of the identity of the receiver of the one MAC PDU; the upper 8 bits and the lower 16 bits constitute an identity.

[0410] As an embodiment, the one MAC PDU includes the first signaling.

[0411] As an embodiment, the one MAC PDU includes the second signaling.

[0412] As an embodiment, the one MAC PDU includes the first information.

[0413] As an embodiment, the one MAC PDU includes the second message.

[0414] As an embodiment, the one MAC PDU includes the third information.

[0415] As an embodiment, the one MAC PDU includes any data unit in the first data unit set.

[0416] As an embodiment, the one MAC PDU includes any data unit in the second data unit set.

[0417] As an embodiment, the one MAC PDU includes any data unit in the third data unit set.

[0418] As an embodiment, the MAC subheader includes an LCID, and the LCID is used to indicate the radio bearer to which the MAC SDU belongs.

[0419] As an embodiment, the one MAC SDU is distributed to the target RLC entity according to the LCID of the one MAC SDU.

[0420] Example 7

[0421] Embodiment 7 illustrates a schematic diagram of a second signaling format according to an embodiment of the present application, as shown in the attached Figure 7 shown.

[0422] As an embodiment, the second signaling shown includes a second PDCP control PDU; the second PDCP control PDU shown includes a PDCP status report.

[0423] As an example, Figure 7 As shown, the D / C (data / control) field included in the second PDCP control PDU is 0; the PDU type (type) field is 000; the R field is reserved; the FMC (First Missing Count, the first packet loss count value) includes 32 bits, indicating the Count (count value) of the first lost PDCP SDU in the first window, and the Count is determined by the sequence number of the PDCP SDU; the position of any bit in Bitmap1 (bitmap) to BitmapN indicates the sequence number of the PDCP SDU and the offset value of the sequence number of the first lost PDCP SDU; when the value of any bit is 0, it indicates that the PDCP SDU corresponding to the sequence number indicated by the position of any bit starting from the sequence number of the first lost PDCP SDU has not been received, and when the value of any bit is 1, it indicates that the PDCP SDU corresponding to the sequence number indicated by the position of any bit starting from the sequence number of the first lost PDCP SDU has not been received. SDU has been received; wherein the value of Count can be obtained by using the first window size and the sequence number of the PDCP SDU according to the method described in Section 5.2.2 of Protocol 38.323 of the 3GPP standard; when (FMC+bit position) mod 2 32 When the value of is the same as the value of Count, the bit position indicated by the bit position indicates the serial number of the PDCP SDU. The FMC can be obtained according to the method described in Section 5.4.1 of Protocol 38.323 of the 3GPP standard, which will not be repeated here. The mod is a modulus operation.

[0424] As an embodiment, the second PDCP control PDU may not include the Bitmap field.

[0425] As an embodiment, the Bitmap field included in the second PDCP control PDU includes at least one bit position of 0.

[0426] As an embodiment, at least the former of the FMC field in the second PDCP control PDU and the bit position where the Bitmap is 0 indicates a set of lost data units; and the first set of data units includes the set of lost data units.

[0427] As an embodiment, the FMC field in the second PDCP controls the PDU, and at least the former of the bit positions where the Bitmap is 0 and the last bit position where the Bitmap is 1 indicates the second data unit set; wherein the FMC field and at least the former of the bit positions where the Bitmap is 0 indicate the lost data unit set; the FMC field and at least the former of the last bit position where the Bitmap is 1 are used to implicitly indicate the sequence number of the next data unit to be received; the second data unit set includes the lost data unit set and the next data unit to be received and the data unit after the next data unit to be received.

[0428] As a sub-embodiment of the above embodiment, at least the former of the FMC field and the last bit position that is 1 in the Bitmap is used to indicate a first sequence number, and the sequence number of the next data unit to be received is the first sequence number plus 1; the first sequence number indicates the maximum value in the sequence number set corresponding to the set of data units that have been received.

[0429] Example 8

[0430] Embodiment 8 illustrates a schematic diagram of another second signaling format according to an embodiment of the present application, as shown in the attached figure. Figure 8 shown.

[0431] As an embodiment, the second signaling includes a second RLC control PDU; the second RLC control PDU includes a STATUS PDU.

[0432] As an example, Figure 8As shown, the D / C field included in the second RLC control PDU is 0; the CPT (Control PDU Type) field is 000; the ACK_SN (Acknowledgement (ACK) sequence number) field indicates the sequence number of the next RLC SDU to be received; the E1 (Extension 1) field indicates whether there are more NACK_SN, E1, E2 and E3 behind; the R field is reserved; the NACK_SN (NegativeAcknowledgement (NACK) sequence number) field indicates the sequence number of the lost RLC SDU or the lost RLC SDU segment; the E2 field indicates whether there is SOstart and SOend after the NACK_SN field, and the NACK_SN field is associated with the SOstart and the SOend respectively; the E3 field indicates whether there is a NACKrange field after the NACK_SN field, and the NACK_SN field is associated with the NACK range; the SOstart and the SOend respectively indicate the RLC indicated by the NACK_SN. The start byte and the end byte of the SDU segment in the original RLC SDU; the NACK range field indicates the number of consecutively lost RLC SDUs starting from NACK_SN; wherein, as shown in the attached Figure 8 As shown, the ACK_SN field and the NACK_SN field include 12 bits respectively, and the ACK_SN field and the NACK_SN field may also include 18 bits respectively.

[0433] As an embodiment, the second RLC control PDU includes at least one NACK_SN field.

[0434] As an embodiment, at least the former of the NACK_SN field, the SOstart field, the SOend field and the NACK range field in the second RLC control PDU is used to indicate a set of lost data units; the first set of data units includes the set of lost data units.

[0435] As an embodiment, at least the former of the NACK_SN field, the SOstart field, the SOend field and the NACK range field in the second RLC control PDU indicates a set of lost data units; the ACK_SN field in the STATUS PDU indicates the next data unit to be received; the second data unit set includes the lost data unit and the next data unit to be received and the data unit after the next data unit to be received.

[0436] Example 9

[0437] Embodiment 9 illustrates a schematic diagram of a first signaling format according to an embodiment of the present application, as shown in the attached Fig. 9 shown.

[0438] As an embodiment, the first signaling includes a first MAC sub-PDU, and the first MAC sub-PDU indicates an EndMarker message.

[0439] As an embodiment, when the first MAC sub-PDU includes a Private Extension, as shown in the attached Fig. 9 As shown in Case A, the first MAC sub-PDU includes a first MAC sub-header and a first MAC SDU; the R field included in the first MAC sub-header is reserved; the F field included in the first MAC sub-header indicates the length of the L field included in the MAC sub-header; the L field included in the first MAC sub-header indicates the number of bytes included in the first MAC SDU; and the first MAC SDU includes the Private Extension.

[0440] As an embodiment, when the first MAC sub-PDU does not include Private Extension, as shown in the attached Fig. 9 As shown in case B, the first MAC sub-PDU only includes the first MAC sub-header and necessary padding; the R field included in the first MAC sub-header is reserved.

[0441] As an embodiment, the LCID field in the first MAC subheader includes a positive integer indexed between 20 and 61, including 20 and 61.

[0442] As an embodiment, the Private Extension field includes the IE format defined in Section 8.6 of Protocol 29.281 of the 3GPP standard.

[0443] Example 10

[0444] Embodiment 10 illustrates a schematic diagram of another first signaling format according to an embodiment of the present application, as shown in the attached Fig.10 shown.

[0445] As an embodiment, the first signaling shown includes a first RLC control PDU; the first RLC control PDU shown includes an End Marker message.

[0446] As an example, Fig.10 As shown, the D / C field included in the first RLC control PDU is 0; the R field included in the first RLC control PDU is reserved; and the Private Extension included in the first RLC control PDU is optional.

[0447] As an embodiment, the CPT (Control PDU Type) field included in the first RLC control PDU is 001.

[0448] As an embodiment, the CPT field included in the first RLC control PDU is 010.

[0449] As an embodiment, the CPT field included in the first RLC control PDU is 011.

[0450] As an embodiment, the CPT field included in the first RLC control PDU is 100.

[0451] As an embodiment, the CPT field included in the first RLC control PDU is 101.

[0452] As an embodiment, the CPT field included in the first RLC control PDU is 110.

[0453] As an embodiment, the CPT field included in the first RLC control PDU is 111.

[0454] Embodiment 11

[0455] Embodiment 11 illustrates a schematic diagram of a wireless protocol architecture for relay transmission according to an embodiment of the present application, as shown in the attached Fig.11 Attached Fig.11 In the present invention, RLC sublayer 1113 and RLC sublayer 1123 are optional.

[0456] Attached Fig.11In the relay transmission, take data sent by the first node to the third node as an example (data sent by the third node to the first node can be obtained in the same way): the first target data is processed by the PDCP sublayer 1104 and the RLC sublayer 1103 on the first node side in sequence to generate a first target MAC PDU in the MAC sublayer 1102, and then passed to the PHY layer 1101, and then transmitted to the PHY layer 1111 of the second node through the air interface, and then processed by the MAC sublayer 1112 and the RLC sublayer 1113 in sequence to restore the first RLC data; the first RLC data is re-merged into the second RLC data in the RLC sublayer 1123 (optional), and then processed by the MAC sublayer 1122 to generate the second target MAC PDU and passed to the PHY layer 1121; then transmitted to the PHY layer 1131 of the third node through the air interface, and then successively processed by the MAC sublayer 1132 to restore the second target MAC PDU, and then successively processed by the RLC sublayer 1133 and the PDCP sublayer 1134 to restore the second target data.

[0457] As an embodiment, the first RLC data and the second RLC data are respectively RLC SDUs.

[0458] As an embodiment, the first RLC data and the second RLC data are respectively RLC SDU segments.

[0459] As an embodiment, the RLC sublayer 1123 cannot segment the RLC data.

[0460] As an embodiment, the RLC sublayer 1123 may perform data merging on the RLC data.

[0461] As an embodiment, the RLC sublayer 1123 does not merge or segment the RLC data, but only performs storage, forwarding, and retransmission when necessary; the second RLC data is the same as the first RLC data.

[0462] As an embodiment, the first target data is generated in the RRC / SDAP 1105 , and the second target data is delivered to the RRC / SDAP 1135 .

[0463] As an embodiment, the first target data and the second target data respectively carry the second signaling.

[0464] As an embodiment, the first target data and the second target data respectively carry the second information.

[0465] As an embodiment, the first target data and the second target data respectively carry the third information.

[0466] As an embodiment, the first target data and the second target data respectively carry the second data unit set.

[0467] As an embodiment, the first target data carries the fifth data unit set.

[0468] As an embodiment, the second target data carries the third data unit set.

[0469] As an embodiment, the first wireless bearer includes entities corresponding to the following sublayers: the PDCP sublayer 1104, the RLC sublayer 1103, the RLC sublayer 1133 and the PDCP sublayer 1134.

[0470] As an embodiment, the first wireless bearer includes entities corresponding to the following sublayers: the RLC sublayer 1113 and the RLC sublayer 1123.

[0471] As an embodiment, the first radio bearer includes entities corresponding to the following sublayers: the RRC / SDAP1105 and the RRC / SDAP 1135.

[0472] As an embodiment, the first radio bearer is multiplexed to the MAC entity corresponding to the MAC sublayer 1102 and the MAC entity corresponding to the MAC sublayer 1132.

[0473] As an embodiment, the first information indicates that the node identified by the first identity releases the RLC sublayer 1123 corresponding to the first radio bearer.

[0474] As an embodiment, in response to sending the first signaling, the RLC sublayer 1113 corresponding to the first radio bearer is released.

[0475] As an embodiment, although not shown in the figure, the second node includes an adaptation sublayer (optional); the adaptation sublayer implements control plane functions related to relaying.

[0476] As an embodiment, if the RLC sublayer 1113 and the RLC sublayer 1123 do not exist, the adaptation sublayer is located above the MAC sublayer 1112 and the MAC sublayer 1122.

[0477] As an embodiment, if the RLC sublayer 1113 and the RLC sublayer 1123 exist, the adaptation sublayer is located above the RLC sublayer 1113 and the RLC sublayer 1123 .

[0478] Example 12

[0479] Embodiment 12 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application, as shown in the attached figure. Fig.12 As shown in the attached Fig.12 In the embodiment, the first node processing device 1200 includes a first receiver 1201 and a first transmitter 1202.

[0480] The first receiver 1201 includes the attached Figure 4 The transmitter / receiver 454 (including the antenna 452), the receiving processor 456, the multi-antenna receiving processor 458 or the controller / processor 459; the first transmitter 1202 includes the attached application Figure 4 At least one of the transmitter / receiver 454 (including antenna 452), transmit processor 468, multi-antenna transmit processor 457 or controller / processor 459.

[0481] In embodiment 12, a first receiver 1201 receives a first signaling through an air interface; a first transmitter 1202 sends a first wireless signal in response to receiving the first signaling, wherein the first wireless signal includes a second signaling; the first receiver 1201 receives a second data unit set through an air interface; wherein the second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0482] As an embodiment, the first receiver 1201, in response to receiving the first signaling, clears the first identity from the first identity list; monitors the physical layer signaling through the sub-link, and when the detected physical layer signaling includes some bits of any identity in the first identity list, performs channel decoding on the physical layer channel scheduled by the detected physical layer signaling; when the detected physical layer signaling does not include some bits of any identity in the first identity list, abandons channel decoding on the physical layer channel scheduled by the detected physical layer signaling; wherein the first identity identifies the sender of the first signaling; and the number of bits included in the partial bits is a positive integer multiple of 8.

[0483] As an embodiment, the first receiver 1201, in response to receiving the first signaling, clears the first identity from the first identity list; monitors the physical layer signaling through the sub-link, and when the detected physical layer signaling includes some bits of any identity in the first identity list, performs channel decoding on the physical layer channel scheduled by the detected physical layer signaling; when the detected physical layer signaling does not include some bits of any identity in the first identity list, abandons channel decoding on the physical layer channel scheduled by the detected physical layer signaling; wherein the first identity identifies the sender of the first signaling; the number of bits included in the some bits is a positive integer multiple of 8; the first transmitter 1202 sends first information through the air interface; wherein the first information indicates that the first wireless link has failed; the receiver of the first information includes the node identified by the first identity.

[0484] As an embodiment, the first receiver 1201 receives a third data unit set through an air interface; wherein the third data unit set is used to determine the first data unit set; and the reception time of the first signaling is no earlier than the reception time of any data unit in the third data unit set.

[0485] As an embodiment, the first receiver 1201, as a response to receiving the first signaling, clears the first identity from the first identity list; monitors the physical layer signaling through the sub-link, and when the detected physical layer signaling includes some bits of any identity in the first identity list, performs channel decoding on the physical layer channel scheduled by the detected physical layer signaling; when the detected physical layer signaling does not include some bits of any identity in the first identity list, abandons channel decoding on the physical layer channel scheduled by the detected physical layer signaling; wherein the first identity identifies the sender of the first signaling; the number of bits included in the some bits is a positive integer multiple of 8; the first receiver 1201 receives second information through the air interface; wherein the second information includes the first identity list and a first configuration; the first identity list includes Q identities, and Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure a first wireless bearer; the first parameter set is applicable to the first data unit set and the second data unit set.

[0486] As an embodiment, the first receiver 1201, as a response to receiving the first signaling, clears the first identity from the first identity list; monitors the physical layer signaling through the sub-link, and when the detected physical layer signaling includes some bits of any identity in the first identity list, performs channel decoding on the physical layer channel scheduled by the detected physical layer signaling, and when the detected physical layer signaling does not include some bits of any identity in the first identity list, abandons channel decoding on the physical layer channel scheduled by the detected physical layer signaling; wherein, the first identity identifies the sender of the first signaling; the number of bits included in the some bits is a positive integer multiple of 8; the first receiver 1201 receives third information through the air interface; wherein, the third information indicates a second identity list; the second identity list does not include the first identity; an identity in the second identity list is used to identify the receiver of the first wireless signal.

[0487] Embodiment 13

[0488] Embodiment 13 illustrates a structural block diagram of a processing device in a second node according to an embodiment of the present application, as shown in the attached figure. Fig.13 As shown in the attached Fig.13 In the embodiment, the second node processing device 1300 includes a second receiver 1301 and a second transmitter 1302.

[0489] The second receiver 1301 includes the attached Figure 4 The transmitter / receiver 418 (including the antenna 420), the receiving processor 470, the multi-antenna receiving processor 472 or the controller / processor 475; the second transmitter 1302 includes the attached application Figure 4 At least one of the transmitter / receiver 418 (including antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 or the controller / processor 475.

[0490] In embodiment 13, a second transmitter 1302 sends a first signaling through an air interface; wherein a first wireless signal is received, the first wireless signal includes a second signaling, and the second signaling is used to generate a second wireless signal; the second wireless signal is sent; a second data unit set is received through the air interface; the second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the second node is not co-located with a recipient of the first wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0491] As an embodiment, the first identity is cleared from the first identity list; the physical layer signaling of the side link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding; when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned from performing channel decoding; wherein, the first identity identifies the sender of the first signaling; and the number of bits included in the partial bits is a positive integer multiple of 8.

[0492] As an embodiment, the second receiver 1301 receives first information via an air interface; wherein the first information indicates that the first wireless link has failed.

[0493] As an embodiment, the second receiver 1301 receives a third wireless signal set; the second transmitter 1302 sends a fourth wireless signal set; wherein a fourth data unit set is recovered from the third wireless signal set, and the fourth data unit set is used to generate the fourth wireless signal set; the fourth data unit set includes the third data unit set; the third data unit set is used to determine the first data unit set; and the sending time of the first signaling is no earlier than the sending time of any wireless signal in the fourth wireless signal set.

[0494] As an embodiment, the first identity is cleared from the first identity list; the physical layer signaling of the side link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding, and when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding; wherein, the first identity identifies the sender of the first signaling; the number of bits included in the partial bits is a positive integer multiple of 8; the second receiver 1301 receives the fifth wireless signal; the second transmitter 1302 sends the sixth wireless signal; wherein, the second information is recovered from the fifth wireless signal, and the second information is used to generate the sixth wireless signal; the second information includes a first identity list and a first configuration; the first identity list includes Q identities, and Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure a first wireless bearer; the first parameter set is applicable to the first data unit set and the second data unit set.

[0495] As an embodiment, the first identity is cleared from the first identity list; the physical layer signaling of the side link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding, and when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding; wherein, the first identity identifies the sender of the first signaling; the number of bits included in the partial bits is a positive integer multiple of 8; third information is received; the third information indicates a second identity list; the second identity list does not include the first identity; an identity in the second identity list is used to identify the receiver of the first wireless signal.

[0496] Embodiment 14

[0497] Embodiment 14 illustrates a structural block diagram of a processing device in a third node according to an embodiment of the present application, as shown in the attached figure. Fig.14 As shown in the attached Fig.14 In the embodiment, the third node processing device 1400 includes a third receiver 1401 and a third transmitter 1402.

[0498] The third receiver 1401 includes the attached Figure 4 The transmitter / receiver 418 (including the antenna 420), the receiving processor 470, the multi-antenna receiving processor 472 or the controller / processor 475; the second transmitter 1402 includes the attached application Figure 4 At least one of the transmitter / receiver 418 (including antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 or the controller / processor 475.

[0499] In embodiment 14, a third receiver 1401 receives a second wireless signal, wherein the second wireless signal includes a second signaling; a third transmitter 1402 sends a second data unit set through an air interface; wherein the second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through a first wireless bearer; the second signaling is used to determine the second data unit set; the first signaling is sent; the sender of the first signaling is not co-located with the sender of the second wireless signal; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

[0500] As an embodiment, the first identity is cleared from the first identity list; the physical layer signaling of the side link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding; when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned from performing channel decoding; wherein, the first identity identifies the sender of the first signaling; and the number of bits included in the partial bits is a positive integer multiple of 8.

[0501] As an embodiment, the first identity is cleared from the first identity list; the physical layer signaling of the secondary link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding, and when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned for channel decoding; wherein, the first identity identifies the sender of the first signaling; the number of bits included in the partial bits is a positive integer multiple of 8; the first information is sent; wherein, the first information indicates that the first wireless link has failed; the receiver of the first information includes the node identified by the first identity.

[0502] As an embodiment, the third transmitter 1402 sends a fifth data unit set through an air interface; the fifth data unit set includes the third data unit set; wherein the third data unit set is used to determine the first data unit set; and the reception time of the first signaling is no earlier than the reception time of any data unit in the third data unit set.

[0503] As an embodiment, the first identity is cleared from the first identity list; it is monitored through the side link physical layer signaling, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding, and when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding; wherein, the first identity identifies the sender of the first signaling; the number of bits included in the partial bits is a positive integer multiple of 8; the third transmitter 1402 sends second information through the air interface; wherein, the second information includes the first identity list and a first configuration; the first identity list includes Q identities, and Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure a first wireless bearer; the first parameter set is applicable to the first data unit set and the second data unit set.

[0504] As an embodiment, the first identity is cleared from the first identity list; it is monitored through the side link physical layer signaling, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding, and when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding; wherein, the first identity identifies the sender of the first signaling; the number of bits included in the some bits is a positive integer multiple of 8; the third transmitter 1402 sends third information through the air interface; wherein, the third information indicates a second identity list; the second identity list does not include the first identity; an identity in the second identity list is used to identify the sender of the second wireless signal.

[0505] A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software function module, and the present application is not limited to any specific form of software and hardware combination. The first type of communication node or UE or terminal in the present application includes but is not limited to mobile phones, tablet computers, notebooks, Internet cards, low-power devices, eMTC (enhanced Machine Type Communication, enhanced machine type communication) equipment, NB-IoT equipment, vehicle-mounted communication equipment, aircraft, airplanes, drones, remote-controlled aircraft and other wireless communication equipment. The second type of communication node or base station or network side equipment in the present application includes but is not limited to macrocellular base stations, microcellular base stations, home base stations, relay base stations, eNB, gNB, transmission and reception nodes TRP (Transmission and Reception Point, transmission and reception point), relay satellites, satellite base stations, aerial base stations and other wireless communication equipment.

[0506] The above is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first node used for wireless communication, characterized in that: include: A first receiver receives a third set of data units via an air interface; Receiving a first signaling through an air interface, the first signaling including an End Marker message; as a response to receiving the first signaling, clearing the first identity from the first identity list; wherein the first signaling is received no earlier than the time at which any data unit in the third data unit set is received; A first transmitter, in response to receiving the first signaling, sends a first wireless signal, wherein the first wireless signal includes a second signaling; The first receiver receives a second set of data units via an air interface; Among them, the third data unit set is used to determine the first data unit set; the second signaling indicates that the first data unit set has not been received, and the first data unit set and the second data unit set are both transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set; the first identity identifies the sender of the first signaling.

2. The first node according to claim 1, characterized in that: include: The first receiver monitors physical layer signaling through a side link, and when the detected physical layer signaling includes some bits in any identity in the first identity list, performs channel decoding on the physical layer channel scheduled by the detected physical layer signaling, and when the detected physical layer signaling does not include some bits in any identity in the first identity list, abandons channel decoding on the physical layer channel scheduled by the detected physical layer signaling; The number of bits included in the partial bits is a positive integer multiple of 8.

3. The first node according to claim 1 or 2, characterized in that: include: The first transmitter sends first information via an air interface; The first information indicates that the first wireless link fails, the receiver of the first information includes the node identified by the first identity, and one of the two nodes linking the first wireless link is the sender of the first signaling.

4. The first node according to any one of claims 1 to 3, characterized in that: include: The first receiver receives second information via an air interface; The second information includes the first identity list and a first configuration; the first identity list includes Q identities, where Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure the first radio bearer; The first set of parameters is applicable to the first set of data units and the second set of data units.

5. The first node according to any one of claims 1 to 4, characterized in that: include: The first receiver receives third information via an air interface; The third information indicates a second identity list; the second identity list does not include the first identity; and an identity in the second identity list is used to identify the receiver of the first wireless signal.

6. A second node used for wireless communication, characterized in that: include: A second receiver receives a third wireless signal set; A second transmitter transmits a fourth wireless signal set; wherein a fourth data unit set is recovered from the third wireless signal set, and the fourth data unit set is used to generate a fourth wireless signal set; the fourth data unit set includes the third data unit set; and the third data unit set is used to determine the first data unit set; The second transmitter sends a first signaling through an air interface, wherein the first signaling includes an End Marker message; a sending time of the first signaling is no earlier than a sending time of any wireless signal in the fourth wireless signal set; Among them, the first signaling indicates that the first identity is cleared from the first identity list, and the first identity identifies the second node; a first wireless signal is received, the first wireless signal includes a second signaling, and the second signaling is used to generate a second wireless signal; the second wireless signal is sent; a second data unit set is received through the air interface; the second signaling indicates that the first data unit set has not been received, and the first data unit set and the second data unit set are both transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the second node is not co-located with the recipient of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set.

7. The second node according to claim 6, characterized in that: The physical layer signaling of the secondary link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding; when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding; The number of bits included in the partial bits is a positive integer multiple of 8.

8. The second node according to claim 6 or 7, characterized in that: include: The second receiver receives the first information via an air interface; The first information indicates that a first wireless link fails, and one of two nodes linking the first wireless link is the second node.

9. The second node according to any one of claims 6 to 8, characterized in that: include: The second receiver receives a fifth wireless signal; The second transmitter sends a sixth wireless signal; wherein, second information is recovered from the fifth wireless signal, and the second information is used to generate the sixth wireless signal; the second information includes the first identity list and the first configuration; the first identity list includes Q identities, where Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure the first wireless bearer; The first set of parameters is applicable to the first set of data units and the second set of data units.

10. The second node according to any one of claims 6 to 9, characterized in that: Third information is received; the third information indicates a second identity list; the second identity list does not include the first identity; an identity in the second identity list is used to identify the recipient of the first wireless signal.

11. A third node used for wireless communication, characterized in that: include: a third transmitter, transmitting a fifth set of data units via an air interface; The fifth data unit set includes the third data unit set; The third set of data units is used to determine the first set of data units; A third receiver receives a second wireless signal, wherein the second wireless signal includes a second signaling; The third transmitter sends a second data unit set via an air interface; The second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through the first radio bearer; the second signaling is used to determine the second data unit set; the first signaling is sent, and the first signaling includes an End Marker message; the first signaling indicates that the first identity is cleared from the first identity list, and the first identity identifies the sender of the first signaling; The reception time of the first signaling is no earlier than the reception time of any data unit in the third data unit set; the sender of the first signaling and the sender of the second wireless signal are not co-located; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

12. The third node according to claim 11, characterized in that: The physical layer signaling of the secondary link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding; when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding; The number of bits included in the partial bits is a positive integer multiple of 8.

13. The third node according to claim 11 or 12, characterized in that: First information is sent, the first information indicating that a first wireless link fails, a receiver of the first information includes the sender of the first signaling; one of two nodes linking the first wireless link is the sender of the first signaling.

14. The third node according to any one of claims 11 to 13, characterized in that: include: The third transmitter sends the second information via the air interface; The second information includes the first identity list and a first configuration; the first identity list includes Q identities, where Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure the first radio bearer; The first set of parameters is applicable to the first set of data units and the second set of data units.

15. The third node according to any one of claims 11 to 14, characterized in that: include: The third transmitter sends third information via an air interface; The third information indicates a second identity list; the second identity list does not include the first identity; and an identity in the second identity list is used to identify the sender of the second wireless signal.

16. A method in a first node for wireless communication, characterized in that: include: receiving a third set of data units over the air interface; receiving a first signaling through an air interface, wherein the first signaling includes an End Marker message; wherein a receiving time of the first signaling is not earlier than a receiving time of any data unit in the third data unit set; In response to receiving the first signaling, clearing the first identity from the first identity list; In response to receiving the first signaling, sending a first wireless signal, wherein the first wireless signal includes a second signaling; receiving a second set of data units over the air interface; Among them, the third data unit set is used to determine the first data unit set; the second signaling indicates that the first data unit set has not been received, and the first data unit set and the second data unit set are both transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the sender of the first signaling is not co-located with the receiver of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set; the first identity identifies the sender of the first signaling.

17. The method in the first node according to claim 16, characterized in that: include: Monitoring physical layer signaling through a secondary link, when the detected physical layer signaling includes some bits in any identity in the first identity list, performing channel decoding on the physical layer channel scheduled by the detected physical layer signaling, and when the detected physical layer signaling does not include some bits in any identity in the first identity list, abandoning channel decoding on the physical layer channel scheduled by the detected physical layer signaling; The number of bits included in the partial bits is a positive integer multiple of 8.

18. The method in the first node according to claim 16 or 17, characterized in that: include: sending first information via an air interface; The first information indicates that the first wireless link fails, the receiver of the first information includes the node identified by the first identity, and one of the two nodes linking the first wireless link is the sender of the first signaling.

19. The method in the first node according to any one of claims 16 to 18, characterized in that: include: receiving second information via an air interface; The second information includes the first identity list and a first configuration; the first identity list includes Q identities, where Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure the first radio bearer; The first set of parameters is applicable to the first set of data units and the second set of data units.

20. The method in the first node according to any one of claims 16 to 19, characterized in that: include: receiving third information via the air interface; The third information indicates a second identity list; the second identity list does not include the first identity; and an identity in the second identity list is used to identify the receiver of the first wireless signal.

21. A method in a second node for wireless communication, characterized in that: include: receiving a third set of wireless signals; Sending a fourth wireless signal set; wherein a fourth data unit set is recovered from the third wireless signal set, and the fourth data unit set is used to generate a fourth wireless signal set; the fourth data unit set includes the third data unit set; and the third data unit set is used to determine the first data unit set; Sending a first signaling through an air interface, wherein the first signaling includes an End Marker message; the sending time of the first signaling is no earlier than the sending time of any wireless signal in the fourth wireless signal set; Among them, the first signaling indicates that the first identity is cleared from the first identity list, and the first identity identifies the second node; a first wireless signal is received, the first wireless signal includes a second signaling, and the second signaling is used to generate a second wireless signal; the second wireless signal is sent; a second data unit set is received through the air interface; the second signaling indicates that the first data unit set has not been received, and the first data unit set and the second data unit set are both transmitted through the first wireless bearer; the second signaling is used to determine the second data unit set; the second node is not co-located with the recipient of the first wireless signal; the first data unit set includes at least one data unit; the second data unit set includes the first data unit set.

22. The method in the second node according to claim 21, characterized in that: The physical layer signaling of the secondary link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding; when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding; The number of bits included in the partial bits is a positive integer multiple of 8.

23. The method in the second node according to claim 21 or 22, characterized in that: include: receiving first information via an air interface; The first information indicates that a first wireless link fails, and one of two nodes linking the first wireless link is the second node.

24. The method in the second node according to any one of claims 21 to 23, characterized in that: include: receiving a fifth wireless signal; sending a sixth wireless signal; wherein, second information is recovered from the fifth wireless signal, and the second information is used to generate the sixth wireless signal; the second information includes the first identity list and the first configuration; the first identity list includes Q identities, where Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure the first wireless bearer; The first set of parameters is applicable to the first set of data units and the second set of data units.

25. The method in the second node according to any one of claims 21 to 24, characterized in that: Third information is received; the third information indicates a second identity list; the second identity list does not include the first identity; an identity in the second identity list is used to identify the recipient of the first wireless signal.

26. A method in a third node for wireless communication, characterized in that: include: sending a fifth set of data units over the air interface; The fifth data unit set includes the third data unit set; the third data unit set is used to determine the first data unit set; receiving a second wireless signal, wherein the second wireless signal includes a second signaling; sending a second set of data units over the air interface; The second signaling indicates that the first data unit set has not been received, and both the first data unit set and the second data unit set are transmitted through the first radio bearer; the second signaling is used to determine the second data unit set; the first signaling is sent, and the first signaling includes an End Marker message; the first signaling indicates that the first identity is cleared from the first identity list, and the first identity identifies the sender of the first signaling; The reception time of the first signaling is no earlier than the reception time of any data unit in the third data unit set; the sender of the first signaling and the sender of the second wireless signal are not co-located; the first data unit set includes at least one data unit; and the second data unit set includes the first data unit set.

27. The method in the third node according to claim 26, characterized in that: The physical layer signaling of the secondary link is monitored, and when the detected physical layer signaling includes some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is subjected to channel decoding; when the detected physical layer signaling does not include some bits of any identity in the first identity list, the physical layer channel scheduled by the detected physical layer signaling is abandoned to perform channel decoding; The number of bits included in the partial bits is a positive integer multiple of 8.

28. The method in the third node according to claim 26 or 27, characterized in that: First information is sent, the first information indicating that a first wireless link fails, a receiver of the first information includes the sender of the first signaling; one of two nodes linking the first wireless link is the sender of the first signaling.

29. The method in the third node according to any one of claims 26 to 28, characterized in that: include: sending second information via the air interface; The second information includes the first identity list and a first configuration; the first identity list includes Q identities, where Q is a positive integer; the first configuration includes a first parameter set, and the first parameter set is used to configure the first radio bearer; The first set of parameters is applicable to the first set of data units and the second set of data units.

30. The method in the third node according to any one of claims 26 to 29, characterized in that: include: sending third information via the air interface; The third information indicates a second identity list; the second identity list does not include the first identity; and an identity in the second identity list is used to identify the sender of the second wireless signal.

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