CN113660631A

CN113660631A - Method and apparatus for relay transmission

Info

Publication number: CN113660631A
Application number: CN202010396071.3A
Authority: CN
Inventors: 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2021-11-16

Abstract

The invention discloses a method and a device for relay transmission. The first node sends a first signaling and a first wireless signal; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises the second part of the first identity and a fourth part of the third identity; the second signaling and the second wireless signal are sent by the recipient of the first signaling; the second signaling comprises configuration information of a second wireless signal; the second signaling includes a first portion of the second identity and a third portion of the third identity, and the second wireless signal includes the first MAC PDU. The method and the device can reduce air interface overhead and delay and improve transmission robustness.

Description

Method and apparatus for relay transmission

Technical Field

The present invention relates to a method and an apparatus in a wireless communication system, and more particularly, to a scheme and an apparatus for supporting relay transmission in a wireless communication system.

Background

Relay communication is a common method in cellular network communication, and data of a source node reaches a remote node through forwarding of a relay node. The source node and the remote node are typically a base station device and a user equipment, and the relay node may be a network device or a user equipment. Common relay communication includes layer 1 relay and layer 2 relay, where the former relay node forwards information bits restored in a physical layer, and the latter relay node forwards information bits restored in layer 2.

D2D (Device to Device) or V2X (Vehicle to outside) is an important application scenario in cellular communication, enabling direct communication between two communication terminals. In both the 3GPP (3rd Generation Partner Project) 4G and 5G standards, D2D/V2X was introduced.

Disclosure of Invention

The inventor finds through research that SCI (Sidelink Control Information) in D2D/V2X can only carry a part of the complete User identities of the data source User and the data receiver User, i.e., after receiving SCI, a UE (User Equipment) cannot determine whether data transmitted on psch (Physical Sidelink Shared CHannel) is useful data. Therefore, the UE may not be able to determine whether to perform the relay according to the SCI.

In view of the above, the present application discloses a solution. It should be noted that, in the description of the present application, only the V2X scenario is taken as a typical application scenario or example; the application is also applicable to scenes, such as downlink transmission, except for V2X facing similar problems, and achieves technical effects similar to those in the NR V2X scene. Furthermore, the adoption of a unified solution for different scenarios (including but not limited to V2X, downstream communication, etc.) also helps to reduce hardware complexity and cost. Without conflict, embodiments and features of embodiments in any node of the present application may be applied to any other node. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.

The application discloses a method in a first node used for wireless communication, comprising:

transmitting a first signaling and a first wireless signal; the first signaling includes configuration information of a first wireless signal, the first signaling includes a first part of a first identity and a third part of a second identity, the first wireless signal includes a first MAC (Medium Access Control, media Access Control) PDU (Protocol Data Unit), and the first MAC PDU includes a second part of the first identity;

wherein second signaling and a second wireless signal are transmitted when the first MAC PDU includes a fourth portion of a third identity; the second signaling comprises configuration information of a second wireless signal; the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity.

As an embodiment, the first identity, the second identity and the third identity each comprise 24 bits.

As an embodiment, the first identity, the second identity and the third identity are each a link layer identity; any two of the first identity, the second identity and the third identity are different.

In conventional V2X communication, the source identity indicated by the first signaling and the source identity in the scheduled MAC PDU constitute one link layer identity, and similarly, the destination identity indicated by the first signaling and the destination identity in the scheduled MAC PDU constitute another link layer identity. In the above embodiment, the destination identity included in the first signaling and the destination identity included in the first MAC PDU may be from two different link layer identities. The embodiment can realize the rapid joining and leaving of the relay node, improve the transmission stability and reduce the transmission delay.

As an embodiment, the first, second, third and fourth portions include 8 Least Significant Bits (LSB), 16 Most Significant Bits (MSB), 16 least significant bits and 8 most significant bits of the corresponding identity, respectively.

The above-described embodiments maintain good compatibility with existing specifications.

As an embodiment, the first, second, third and fourth portions include 12 Least Significant Bits (LSBs), 12 Most Significant Bits (MSBs), 12 least significant bits and 12 most significant bits of the corresponding identity, respectively.

As an embodiment, the first, second, third and fourth portions include 12 Most Significant Bits (MSB), 12 Least Significant Bits (LSB), 12 most significant bits and 12 least significant bits, respectively, of the corresponding identity.

The two embodiments enable the SCI and the MAC PDU to carry half of the corresponding identity, and the discrimination of the SCI and the MAC PDU is balanced.

As an embodiment, the first, second, third and fourth portions include 8 Least Significant Bits (LSB), 16 Most Significant Bits (MSB), 8 least significant bits and 16 most significant bits, respectively, of the corresponding identity.

In particular, according to an aspect of the application, the method in the first node used for wireless communication comprises:

sending a third signaling;

wherein the first MAC PDU comprises a channel identity of a first logical channel; the third signaling is RRC (Radio Resource Control) signaling, the third signaling includes the channel identity of the first logical channel, and the third signaling includes the third identity.

As an embodiment, the third signaling is sent on a Uu interface.

As an embodiment, the third signaling is sent over a PC5 interface.

As an embodiment, the third signaling includes a partial field (field) in RRCReconfigurationSidelink.

As an embodiment, the third signaling comprises RRCReconfigurationSidelink.

As an embodiment, the third signaling comprises SL-LogicalChannelConfigPC 5.

As an embodiment, the third signaling comprises rrcconnectionreconfiguration sildelink.

receiving a fourth signaling;

wherein the fourth signaling is sent in response to the third signaling not conflicting with a current configuration; the fourth signaling indicates that configuration of the third signaling is completed.

As an embodiment, the fourth signaling is RRC signaling.

As an embodiment, the fourth signaling is MAC signaling.

As an embodiment, the fourth signaling includes a partial field in rrcreeconfiguration completesidelink.

As an embodiment, the fourth signaling comprises rrcreeconfiguration completesidelink.

As an embodiment, the fourth signaling includes a part of a field in rrcconnectionreconfiguration complete sidelink.

As an embodiment, the fourth signaling comprises rrcconnectionreconfiguration complete sidelink.

As an embodiment, whether the third signaling does not conflict with the current configuration is determined by the second node.

As an embodiment, whether the third signaling conflicts with the current configuration is determined by a sender of the fourth signaling.

the first transmitter transmits a sixth signaling;

wherein the target MAC PDU comprises a channel identity of a first logical channel; the sixth signaling is RRC signaling, the sixth signaling comprising the channel identity of the first logical channel, the sixth signaling comprising at least a first portion of the second identity.

As an embodiment, the sixth signaling includes the second identity.

As an embodiment, the sixth signaling comprises only a first part of the second identity.

As an embodiment, the sixth signaling is sent on a Uu interface.

As an embodiment, the sixth signaling is sent on a PC5 interface.

As an embodiment, the sixth signaling includes a partial field (field) in RRCReconfigurationSidelink.

As an embodiment, the sixth signaling includes RRCReconfigurationSidelink.

As an embodiment, the sixth signaling comprises SL-logic channelconfigpc 5.

As an embodiment, the sixth signaling includes rrcconnectionreconfiguration sildelink.

the first receiver receives a seventh signaling;

wherein the seventh signaling is sent as a response that the sixth signaling does not collide with the current configuration; the seventh signaling indicates that configuration of the sixth signaling is completed.

As an embodiment, the seventh signaling is RRC signaling.

As an embodiment, the seventh signaling is MAC signaling.

As an embodiment, the seventh signaling includes a part of the field in rrcreeconfiguration completesidelink.

As an embodiment, the seventh signaling includes rrcreeconfiguration completesidelink.

As an embodiment, the seventh signaling includes a part of a field in rrcconnectionreconfiguration complete sidelink.

As an embodiment, the seventh signaling comprises rrcconnectionreconfiguration complete sidelink.

transmitting a fifth signaling and a fifth wireless signal;

wherein the fifth signaling comprises configuration information for a fifth wireless signal, the fifth signaling comprising a first portion of the first identity and a third portion of the third identity, the fifth wireless signal comprising a second MAC PDU comprising a second portion of the first identity and the fourth portion of the third identity; the third portion of the third identity and the fourth portion of the third identity constitute the third identity, the second MAC PDU comprising the channel identity of the first logical channel.

As an embodiment, the first wireless signal and the fifth wireless signal are transmitted through the same DRB (Data Radio bearer).

As an embodiment, in the above method, through the same DRB, the first node can directly send data to the third node, and send data to the third node through the relay of the second node. The method avoids the increase of signaling overhead and complexity caused by excessive DRB configuration and maintenance.

In particular, according to an aspect of the application, the method in the first node for wireless communication comprises, when the first MAC PDU does not comprise a fourth part of a third identity and comprises a fourth part of the second identity, the first MAC PDU is distributed to a decomposing (resolving) and a Demultiplexing (multiplexing) Entity (Entity); the first MAC PDU is discarded when the first MAC PDU does not include the fourth portion of the third identity and does not include the fourth portion of the second identity.

The application discloses a method in a second node used for wireless communication, comprising:

receiving a first signaling and a first wireless signal; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity;

transmitting second signaling and the second wireless signal when the first MAC PDU includes a fourth portion of a third identity; the second signaling comprises configuration information of a second wireless signal;

wherein the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity.

As an embodiment, the first portion of the second identity included in the second signaling and the fourth portion of the third identity included in the first MAC PDU in combination indicate that a source transmitting node of the first MAC PDU is not the second node but the first node. The method reuses the existing indication scheme about the node identity in the V2X as much as possible, and has good compatibility; meanwhile, the introduction of new signaling overhead is avoided, and the transmission efficiency is improved.

As an embodiment, in the above method, the target receiver (third node) of the second wireless signal adopts the same processing scheme at the MAC layer for the data directly transmitted by the first node and the data relayed by the second node, thereby reducing the processing complexity and delay.

In particular, according to an aspect of the application, the method in the second node for wireless communication comprises:

the second receiver receives a third signaling;

wherein the first MAC PDU comprises a channel identity of a first logical channel; the third signaling is RRC signaling, the third signaling including the channel identity of the first logical channel, the third signaling including the third identity.

the second transmitter, as a response that the third signaling does not conflict with the current configuration, sends a fourth signaling;

wherein the fourth signaling indicates that configuration of the third signaling is completed.

the second receiver, when the first MAC PDU does not include a fourth portion of a third identity and includes a fourth portion of the second identity, to distribute the first MAC PDU to a disaggregation (Disassembly) and Demultiplexing (multiplexing) Entity (Entity); discarding the first MAC PDU when the first MAC PDU does not include the fourth portion of the third identity and does not include the fourth portion of the second identity.

In particular, according to an aspect of the application, the method in the second node for wireless communication comprises: the first identity, the second identity, and the third identity each comprise 24 bits.

In particular, according to an aspect of the application, the method in the second node for wireless communication comprises: the first, second, third and fourth portions include 8 Least Significant Bits (LSBs), 16 Most Significant Bits (MSBs), 16 least significant bits and 8 most significant bits, respectively, of the respective identity.

The application discloses a method in a third node used for wireless communication, comprising:

receiving a target signaling and a target wireless signal; the target signaling comprises configuration information of a target wireless signal;

wherein the target signaling comprises a third portion of a third identity, the target wireless signal comprising a target MAC PDU; the target MAC PDU comprises a second part of the first identity and a fourth part of the third identity;

when the target signaling includes any one of the first part of the first identity and the first part of the second identity, the third receiver distributes the target MAC PDU to a Disassembly (Disassembly) and Demultiplexing (Demultiplexing) Entity (Entity), or transfers a MAC SDU (service Data Unit) in the target MAC PDU to an RLC (Radio Link Control) layer.

In particular, according to an aspect of the application, the method in the third node for wireless communication comprises:

receiving a sixth signaling;

wherein the target MAC PDU comprises a channel identity of a first logical channel; the sixth signaling is a Radio Resource Control (RRC) signaling, the sixth signaling includes the channel identity of the first logical channel, and the sixth signaling includes the second identity.

transmitting a seventh signaling;

In particular, according to an aspect of the application, the method in the third node for wireless communication comprises: the first identity, the second identity, and the third identity each comprise 24 bits.

In particular, according to an aspect of the application, the method in the third node for wireless communication comprises: the first, second, third and fourth portions include 8 Least Significant Bits (LSBs), 16 Most Significant Bits (MSBs), 16 least significant bits and 8 most significant bits, respectively, of the respective identity.

The application discloses a first node used for wireless communication, comprising:

a first transmitter that transmits a first signaling and a first wireless signal; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity;

The application discloses a second node used for wireless communication, comprising:

a second receiver receiving the first signaling and the first wireless signal; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity;

a second transmitter to transmit second signaling and the second wireless signal when the first MAC PDU includes a fourth portion of a third identity; the second signaling comprises configuration information of a second wireless signal;

The application discloses a third node used for wireless communication, comprising:

a third receiver for receiving the target signaling and the target wireless signal; the target signaling comprises configuration information of a target wireless signal;

when the target signaling includes either one of the first part of the first identity and the first part of the second identity, the third receiver distributes the target MAC PDU to a disaggregation (Disassembly) and Demultiplexing (Demultiplexing) Entity (Entity), or passes the MAC SDU in the target MAC PDU to an RLC layer.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings in which:

fig. 1 shows a flow diagram of a relay transmission of a second node according to an embodiment of the invention;

FIG. 2 shows a schematic diagram of a network architecture according to one embodiment of the invention;

fig. 3 shows a schematic diagram of an embodiment of a radio protocol architecture of the user plane and the control plane according to an embodiment of the invention;

FIG. 4 shows a hardware block diagram of a communication node according to an embodiment of the invention;

FIG. 5 illustrates a flow diagram of a transmission among a first node, a second node, and a third node according to one embodiment of the invention;

FIG. 6 shows a schematic diagram of an identity according to an embodiment of the invention;

FIG. 7 shows yet another schematic diagram of an identity in accordance with an embodiment of the present invention;

FIG. 8 illustrates a diagram of a MAC PDU in accordance with one embodiment of the present invention;

FIG. 9 illustrates a mapping diagram of a first identity, a second identity, and a third identity, according to an embodiment of the invention;

FIG. 10 shows a schematic diagram of a third node receiving data according to one embodiment of the invention;

FIG. 11 shows a flow diagram for a second node receiving data according to one embodiment of the invention;

FIG. 12 shows a block diagram of a processing arrangement for use in a first node according to one embodiment of the invention;

fig. 13 shows a block diagram of a processing arrangement for use in a second node according to an embodiment of the invention;

fig. 14 shows a block diagram of a processing device used in a third node according to an embodiment of the present invention.

Detailed Description

The technical solutions of the present application will be further described in detail with reference to the accompanying drawings, and it should be noted that the embodiments and features of the embodiments in the present application can be arbitrarily combined with each other without conflict.

Example 1

Embodiment 1 illustrates a flowchart of relay transmission of a second node according to an embodiment of the present application, as shown in fig. 1.

In embodiment 1, the second node 100 receives a first signaling and a first wireless signal in step 101; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity; in step S102, when the first MAC PDU includes a fourth part of the third identity, transmitting a second signaling and the second wireless signal; the second signaling includes configuration information of a second wireless signal.

In embodiment 1, the second signaling includes a first part of the second identity and a third part of the third identity, and the second wireless signal includes the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity.

As one embodiment, the second transmitter discards the first MAC PDU when the first MAC PDU does not include the fourth portion of the third identity.

As an embodiment, the second transmitter distributes the first MAC PDU to a disaggregation (Disassembly) and Demultiplexing (multiplexing) Entity (Entity) when the first MAC PDU does not include a fourth part of the third identity and includes a fourth part of the second identity.

As an embodiment, when the first MAC PDU does not include the fourth part of the third identity and includes the fourth part of the second identity, the second transmitter passes the MAC SDU carried by the first MAC PDU to the RLC layer.

As one embodiment, the second transmitter discards the first MAC PDU when the first MAC PDU does not include the fourth portion of the third identity and does not include the fourth portion of the second identity.

As an embodiment, the second signaling and the second wireless signal are transmitted only if the first MAC PDU includes a fourth portion of a third identity.

As an embodiment, the first signaling is physical layer signaling.

As an embodiment, the second signaling is physical layer signaling.

As an embodiment, the second node is a user equipment, and the first signaling is SCI (Sidelink Control Information).

As an embodiment, the second node is a network device, and the first signaling is DCI (Downlink Control Information).

As an embodiment, the number of bits included in the first portion, the second portion, the third portion, and the fourth portion is a positive integer multiple of 8.

As an embodiment, the first signaling and the first wireless signal are transmitted on a PSCCH (Physical downlink Control CHannel) and a PSCCH (Physical downlink Shared CHannel), respectively.

As an embodiment, the second signaling and the second wireless signal are respectively transmitted on PSCCH (Physical downlink Control CHannel) and PSCCH (Physical downlink Shared CHannel).

As an embodiment, the first signaling and the first wireless signal are transmitted on the same psch; the second signaling and the second wireless signal are transmitted on the same PSSCH.

As an embodiment, the first signaling and the second signaling are both in a second-stage SCI format (2nd-stage SCI format).

As an embodiment, the configuration information includes a HARQ Process identity (HARQ Process ID).

As one embodiment, the configuration information includes NDI (New Data Indicator).

As one embodiment, the configuration information includes an RV (Redundancy version number).

As one embodiment, the configuration Information includes a CSI (Channel Status Information) request.

As an embodiment, the format of the first signaling is SCI format (format) 0-2.

As an embodiment, the format of the second signaling is SCI format (format) 0-2.

As an embodiment, the first identity, the second identity, and the third identity are each a link layer identity, and any two of the three are not equal.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in fig. 2. Fig. 2 illustrates a V2X communication architecture under a 5G NR (new radio, new air interface), LTE (Long-Term Evolution), and LTE-a (Long-Term Evolution Advanced, enhanced Long-Term Evolution) system architecture. The 5G NR or LTE network architecture may be referred to as 5GS (5GSystem)/EPS (Evolved Packet System) or some other suitable terminology.

The V2X communication architecture of embodiment 2 includes UE (User Equipment) 201, UE241, 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 may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the V2X communication architecture provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks providing circuit-switched services or other cellular networks. The NG-RAN includes NR node b (gNB)203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gnbs 203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (transmitting receiving node), or some other suitable terminology. The gNB203 provides the UE201 with an access point to the 5GC/EPC 210. Examples of the UE201 include a cellular phone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, non-terrestrial base station communications, satellite mobile communications, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, a drone, an aircraft, a narrowband internet of things device, a machine type communication device, a terrestrial vehicle, an automobile, a wearable device, or any other similar functioning device. Those skilled in the art may also refer to UE201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile 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 terminology. The gNB203 is connected to the 5GC/EPC210 through an S1/NG interface. The 5GC/EPC210 includes MME (Mobility Management Entity)/AMF (Authentication Management domain)/SMF (Session Management Function) 211, other MME/AMF/SMF214, S-GW (serving Gateway)/UPF (user plane Function) 212, and P-GW (Packet data Network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC 210. In general, the MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet protocol) packets are transported through the S-GW/UPF212, which S-GW/UPF212 itself is connected to the P-GW/UPF 213. The P-GW provides UE IP address allocation as well as other functions. The P-GW/UPF213 is connected to the internet service 230. The internet service 230 includes an operator-corresponding internet protocol service, and may specifically include the internet, an intranet, an IMS (IP Multimedia Subsystem), and a packet-switched streaming service. The ProSe function 250 is a logical function for network-related behavior required for location-based services (ProSe); including a DPF (Direct Provisioning Function), a Direct Discovery Name Management Function (Direct Discovery Name Management Function), an EPC-level Discovery ProSe Function (EPC-level Discovery ProSe Function), and the like. The ProSe application server 230 has the functions of storing EPC ProSe subscriber identities, mapping between application layer subscriber identities and EPC ProSe subscriber identities, allocating ProSe restricted code suffix pools, etc.

As an embodiment, the UE201 and the UE241 are connected through a Reference Point (Reference Point) of the PC 5.

As an embodiment, the ProSe function 250 is connected with the UE201 and the UE241 through PC3 reference points, respectively.

As an embodiment, the ProSe function 250 is connected with the ProSe application server 230 through a PC2 reference point.

As an embodiment, the ProSe application server 230 is connected with the ProSe application of the UE201 and the ProSe application of the UE241 through a PC1 reference point, respectively.

As an embodiment, the first node, the second node and the third node in the present application are the NR node B, UE201 and the UE241, respectively.

As an embodiment, the first node and the second node in the present application are UE201 and UE241, respectively.

As an embodiment, the first node and the third node in the present application are UE201 and UE241, respectively.

As an embodiment, the second node and the third node in the present application are UE201 and UE241, respectively.

As an embodiment, the wireless link between the UE201 and the UE241 corresponds to a Sidelink (SL) in the present application.

As an embodiment, the radio link from the UE201 to the NR node B is an uplink.

As an embodiment, the radio link from the NR node B to the UE201 is the downlink.

As an embodiment, the UE201 supports relay transmission.

As an embodiment, the UE241 supports relay transmission.

As an example, the gNB203 is a macro cellular (MarcoCellular) base station.

As an embodiment, the gNB203 is a Micro Cell (Micro Cell) base station.

As an embodiment, the gNB203 is a pico cell (PicoCell) base station.

As an example, the gNB203 is a flight platform device.

As an embodiment, the gNB203 is a satellite device.

Example 3

Embodiment 3 illustrates a schematic diagram of an embodiment of a radio protocol architecture of a user plane and a control plane according to the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, fig. 3 showing the radio protocol architecture for the control plane 300 between a first node and a second node, or a first node and a third node, or two UEs 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 herein as PHY 301. Layer 2(L2 layer) 305 is above PHY301, and is responsible for the link between the first node and the second node, or the first node and the third node, or two UEs, through PHY 301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second node (or the third node). The PDCP sublayer 304 provides data ciphering and integrity protection; for the Uu interface, the PDCP sublayer 304 also provides handover support. The RLC sublayer 303 provides segmentation and reassembly of packets, retransmission of missing packets by ARQ, and the RLC sublayer 303 also provides duplicate packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channels. For the Uu interface, the MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell between the first nodes. The MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. The RRC 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. The radio protocol architecture of the user plane 350 includes layer 1(L1 layer) and layer 2(L2 layer), the radio protocol architecture in the user plane 350 for the first node and the second node (or third node) is substantially the same 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 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 further includes an SDAP (Service Data Adaptation Protocol) sublayer 356, and the SDAP sublayer 356 is responsible for mapping between QoS (quality of Service) streams and Data Radio Bearers (DRBs) to support diversity of services. Although not shown, the first node may have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., far end UE, server, etc.).

As an embodiment, the entities of the multiple sub-layers of the control plane in fig. 3 constitute an SRB (Signaling Radio bearer) in the vertical direction.

As an embodiment, entities of the plurality of sublayers of the control plane in fig. 3 constitute a DRB (Data Radio bearer) in a vertical direction.

As an embodiment, the first set of information in this application is generated in the RRC 306.

As an embodiment, the second set of information in this application is generated in the RRC 306.

As an embodiment, the third set of information in this application is generated in the RRC 306.

As an embodiment, the fourth set of information in this application is generated in the RRC 306.

As an embodiment, the first reference signal in the present application is generated in the PHY301 or the PHY 351.

As an embodiment, the first signaling in the present application is generated in the PHY301 or the PHY 351.

As an embodiment, the second signaling in this application is generated in the PHY301 or the PHY 351.

As an embodiment, the MAC pdu in the present application is generated in the MAC302 or the MAC 352.

As an embodiment, the first CSI in the present application is generated in the MAC302 or the MAC 352.

As an example, the

L2 layer

305 or 355 belongs to a higher layer.

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

As an embodiment, the data plane of the second node in this application and the third node in this application only needs to maintain the connection of the MAC sublayer.

As an embodiment, the data plane of the second node in this application and the third node in this application only needs to maintain the connection of the PHY layer.

As an example, the second node in this application and the third node in this application do not need to maintain a connection of the control plane.

The three embodiments avoid the increase of signaling overhead caused by directly establishing/maintaining higher layer connection between the second node and the third node; furthermore, the three embodiments can realize that the second node can rapidly join and exit the relay operation, thereby reducing the delay and improving the transmission robustness.

Example 4

Embodiment 4 shows a hardware module schematic diagram of a communication node according to an embodiment of the present application, as shown in fig. 4. Fig. 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.

The first communications 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.

The second communication device 410 includes a controller/processor 475, a memory 476, a receive processor 470, a transmit processor 416, a multiple antenna receive processor 472, a multiple antenna transmit processor 471, a transmitter/receiver 418, and an antenna 420.

In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network are provided to the controller/processor 475. The controller/processor 475 implements the functionality of layer L2. In transmissions from the second communications device 410 to the first communications 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 communications device 450 based on various priority metrics. The controller/processor 475 is also responsible for 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 constellation 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. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate the physical channels carrying the time-domain multicarrier symbol streams. The multi-antenna transmit processor 471 then performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream that is then provided to a different antenna 420.

In a transmission from the second communications apparatus 410 to the first communications apparatus 450, each receiver 454 receives a signal through its respective antenna 452 at the first communications apparatus 450. Each receiver 454 recovers information modulated onto a radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier symbol stream that is provided to a receive processor 456. Receive processor 456 and multi-antenna receive processor 458 implement the various signal processing functions of the L1 layer. A multi-antenna receive processor 458 performs receive analog precoding/beamforming operations on the baseband multi-carrier symbol stream from the receiver 454. Receive processor 456 converts the baseband multicarrier symbol stream after the receive analog precoding/beamforming operation from the time domain to the frequency domain using a Fast Fourier Transform (FFT). In the frequency domain, the physical layer data signals and the reference signals to be used for channel estimation are demultiplexed by the receive processor 456, and the data signals are subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial streams destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered at a receive processor 456 and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communications device 410 on the physical channel. The upper layer data and control signals are then provided to a controller/processor 459. The controller/processor 459 implements the functionality of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. Memory 460 may be referred to as a computer-readable medium. In transmissions from the second communications device 410 to the second node 450, the controller/processor 459 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the core network. The upper layer packet is then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

In a transmission from the first communications device 450 to the second communications device 410, a data source 467 is used at the first communications device 450 to provide upper layer data packets to a controller/processor 459. Data source 467 represents all protocol layers above the L2 layer. Similar to the send function at the second communications apparatus 410 described in the transmission from the second communications apparatus 410 to the first communications apparatus 450, the controller/processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, implementing L2 layer functions for the user plane and control plane. The controller/processor 459 is also responsible for retransmission of lost packets and signaling to said second communications device 410. A transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding by a multi-antenna transmit processor 457 including codebook-based precoding and non-codebook based precoding, and beamforming, and the transmit processor 468 then modulates the resulting spatial streams into multi-carrier/single-carrier symbol streams, which are provided to different antennas 452 via a transmitter 454 after analog precoding/beamforming 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 provides the radio frequency symbol stream to the antenna 452.

In a transmission from the first communication device 450 to the second communication device 410, the functionality at the second communication device 410 is similar to the receiving functionality 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 an rf signal through its respective antenna 420, converts the received rf signal to a baseband signal, and provides the baseband signal to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multiple antenna receive processor 472 collectively implement the functionality of the L1 layer. 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. Memory 476 may be referred to as a computer-readable medium. In transmission from the first communications device 450 to the second communications device 410, the controller/processor 475 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover upper layer packets from the UE 450. Upper layer data packets from the controller/processor 475 may be provided to a core network.

As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code configured to, for use with the at least one processor, the first communication device 450 apparatus at least: transmitting a first signaling and a first wireless signal; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity; wherein second signaling and a second wireless signal are transmitted when the first MAC PDU includes a fourth portion of a third identity; the second signaling comprises configuration information of a second wireless signal; the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity.

As an embodiment, the first communication device 450 includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: transmitting a first signaling and a first wireless signal; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity; wherein second signaling and a second wireless signal are transmitted when the first MAC PDU includes a fourth portion of a third identity; the second signaling comprises configuration information of a second wireless signal; the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity.

As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 410 means at least: receiving a first signaling and a first wireless signal; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity; transmitting second signaling and the second wireless signal when the first MAC PDU includes a fourth portion of a third identity; the second signaling comprises configuration information of a second wireless signal; wherein the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity.

As an embodiment, the second communication device 410 apparatus includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: receiving a first signaling and a first wireless signal; wherein the first signaling comprises configuration information of a first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity; transmitting second signaling and the second wireless signal when the first MAC PDU includes a fourth portion of a third identity; the second signaling comprises configuration information of a second wireless signal; wherein the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity.

As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 410 means at least: receiving a target signaling and a target wireless signal; the target signaling comprises configuration information of a target wireless signal; wherein the target signaling comprises a third portion of a third identity, the target wireless signal comprising a target MAC PDU; the target MAC PDU comprises a second part of the first identity and a fourth part of the third identity; distributing the target MAC PDU to a disaggregation (Disassembly) and Demultiplexing (Demultiplexing) Entity (Entity) or passing the MAC SDU in the target MAC PDU to an RLC layer when the target signaling includes either one of a first part of a first identity and a first part of a second identity.

As an embodiment, the second communication device 410 apparatus includes: a memory storing a program of computer readable instructions that when executed by at least one processor result in actions comprising: receiving a target signaling and a target wireless signal; the target signaling comprises configuration information of a target wireless signal; wherein the target signaling comprises a third portion of a third identity, the target wireless signal comprising a target MAC PDU; the target MAC PDU comprises a second part of the first identity and a fourth part of the third identity; distributing the target MAC PDU to a disaggregation (Disassembly) and Demultiplexing (Demultiplexing) Entity (Entity) or passing the MAC SDU in the target MAC PDU to an RLC layer when the target signaling includes either one of a first part of a first identity and a first part of a second identity.

For one embodiment, the first communication device 450 corresponds to a first node in the present application; the second communication device 410 corresponds to a second node in the present application.

For one embodiment, the first communication device 450 corresponds to a first node in the present application; the second communication device 410 corresponds to a third node in the present application.

For an embodiment, the first communication device 450 corresponds to a second node in the present application; the second communication device 410 corresponds to a third node in the present application.

For one embodiment, the first communication device 450 is a UE.

For one embodiment, the second communication device 410 is a UE.

Example 5

Embodiment 5 illustrates a transmission flow chart among a first node, a second node and a third node according to an embodiment of the present application, as shown in fig. 5. In fig. 5, the steps in block F1 and block F2, respectively, are optional.

For the first node U1, third signaling is sent in step S101; receiving a fourth signaling in step S102; transmitting a sixth signaling in step S103; receiving a seventh signaling in step S104; transmitting a first signaling and a first wireless signal in step S105;

for the second node U2, third signaling is received in step S201; transmitting a fourth signaling in step S202; receiving a first signaling and a first wireless signal in step S203; transmitting a second signaling and a second wireless signal in step S204;

for the third node U3, sixth signaling is received in step S301; transmitting a seventh signaling in step S302; second signaling and a second wireless signal are received in step S303.

In embodiment 5, the first signaling includes configuration information of a first wireless signal, the first signaling includes a first part of a first identity and a third part of a second identity, the first wireless signal includes a first MAC PDU, the first MAC PDU includes a second part of the first identity; the second signaling and the second wireless signal are sent by the second node U2 only if the first MAC PDU includes a fourth portion of a third identity; the second signaling comprises configuration information of a second wireless signal; the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity; the first MAC PDU comprises a channel identity of a first logical channel; the third signaling is RRC signaling, the third signaling including the channel identity of the first logical channel, the third signaling including the third identity, as a response that the third signaling does not contradict a current configuration, the fourth signaling being sent by the second node U2, the fourth signaling indicating that the configuration of the third signaling is completed; the sixth signaling is RRC signaling, the sixth signaling comprising the channel identity of the first logical channel, the sixth signaling comprising at least a first portion of the second identity; in response to the sixth signaling not conflicting with a current configuration, the seventh signaling is sent by the third node U3; the seventh signaling indicates that configuration of the sixth signaling is completed.

As an embodiment, when the second node has been configured to relay data from the first reference node to the third node before receiving the third signaling, the third signaling is determined to conflict with the current configuration; wherein the link layer identity of the third node is the same as the third identity; the link layer identity of the first reference node is different from the first identity, and the bits of the link layer identity of the first reference node corresponding to the second part of the first identity are the same as the second part of the first identity.

As an embodiment, said data from said first reference node to said third node is configured to be transmitted over a first reference logical channel, a channel identity of said first reference logical channel being the same as said channel identity of said first logical channel.

As an embodiment, when the first logical channel of the second node has been allocated before receiving the third signaling, the third signaling is determined to collide with a current configuration.

As an embodiment, when the PDCP configuration and the RLC configuration indicated by the third signaling are not supported by the second node, the third signaling is determined to conflict with the current configuration.

As an embodiment, when the second node has configured to send data to a second reference node before receiving the third signaling, the third signaling is determined to collide with the current configuration; a link layer identity of the second reference node is comprised of the third portion of the second identity and the fourth portion of the third identity.

As an embodiment, for said data from the second reference node to be transmitted over a second reference logical channel, the channel identity of said second reference logical channel is the same as said channel identity of said first logical channel.

As an embodiment, when the third signaling is determined to collide with the current configuration, rrcreeconfigurationfailuresdielink (instead of the fourth signaling) is transmitted.

As an embodiment, the rrcconnectionreconfiguration failure identity link (instead of the fourth signaling) is sent when the third signaling is determined to collide with the current configuration.

As an embodiment, when the first logical channel of the third node has been allocated before receiving the sixth signaling, the sixth signaling is determined to collide with a current configuration.

As an embodiment, when the PDCP configuration and the RLC configuration indicated by the sixth signaling are not supported by the third node, the sixth signaling is determined to conflict with the current configuration.

As an embodiment, when the third node has been configured to receive data from a third reference node before receiving the sixth signaling, the sixth signaling is determined to contradict a current configuration; wherein the link layer identity of the third node is the same as the third identity; a link layer identity of the third reference node is comprised of the first part of the second identity and the second part of the first identity.

As an embodiment, said data from said third reference node to said third node is configured to be transmitted over a third reference logical channel, a channel identity of said third reference logical channel being the same as said channel identity of said first logical channel.

As an embodiment, the collision determination criterion can avoid erroneous data transmission due to identity collision.

As an embodiment, when the sixth signaling is determined to collide with the current configuration, rrcreeconfigurationfailuresdilink (instead of the seventh signaling) is transmitted.

As an embodiment, the rrcconnectionreconfiguration failure identity link (instead of the seventh signaling) is transmitted when the sixth signaling is determined to collide with the current configuration.

For one embodiment, the first node U1, the second node U2, and the third node U3 are identified by the first identity, the second identity, and the third identity, respectively.

For one embodiment, the first node U1, the second node U2, and the third node U3 are each a UE.

For one embodiment, an SRB is established between the first node U1 and the second node U2, and an SRB and a DRB are established between the first node U1 and the third node U3.

For one embodiment, there is no need to establish SRBs or DRBs between the second node U2 and the third node U3.

As an embodiment, the time-frequency resource occupied by the first signaling and the first wireless signal is determined by the first node U1.

As an embodiment, the time-frequency resource occupied by the first signaling and the first wireless signal is indicated by a network device.

As an embodiment, the time-frequency Resource occupied by the first signaling and the first wireless signal belongs to a first Resource Pool (Resource Pool) reserved for V2X transmission.

As an embodiment, the second node selects, in the first resource pool, a time-frequency resource occupied for transmitting the second signaling and the second wireless signal.

As an embodiment, the first resource pool is indicated by a SIB (System information Block) 12.

As an embodiment, the first resource pool is indicated by RRC-specific (Dedicated) signaling of the first node U1.

As an embodiment, the time-frequency Resource occupied by the first signaling and the first wireless signal and the time-frequency Resource occupied by the second signaling and the second wireless signal both belong to the first Resource Pool (Resource Pool).

As an embodiment, the time-frequency resources occupied by the second signaling and the second wireless signal are indicated to the second node U2 by the first node U1.

The above embodiment can reduce the unnecessary channel sensing performed by the second node U2 and increase the transmission opportunity.

As an embodiment, the third node performs blind detection for the second signaling and the second wireless signal from the first resource pool.

As an embodiment, the time-frequency Resource occupied by the second signaling and the second wireless signal belongs to a second Resource Pool (Resource Pool) reserved for V2X transmission.

As an embodiment, the time-frequency resource occupied by the second signaling and the second wireless signal is determined by the second node U2.

As an embodiment, the second resource pool is indicated by a SIB (System information Block) 12.

As one embodiment, the second resource pool is indicated by RRC-specific (Dedicated) signaling directed to the second node U2.

As an embodiment, the time-frequency resource occupied by the second signaling and the second wireless signal is indicated by a network device.

As an embodiment, the third node U3 determines the time-frequency resources occupied by the second signaling and the second wireless signal through blind detection.

As one embodiment, the blind detection includes performing blind coding for a first order SCI indicating a first psch, the second signaling and the second wireless signal occupying the first psch.

As an embodiment, the blind detection includes CRC (Cyclic Redundancy Check) detection.

As an embodiment, the blind detection comprises coherent detection of the signature sequence.

Example 6

Example 6 illustrates a schematic diagram of an identity according to an embodiment of the present application, as shown in fig. 6.

In example 6, an identity comprises a first part and a second part.

As an embodiment, the number of bits comprised by the first part and the number of bits comprised by the second part are both positive integer multiples of 8.

As an embodiment, the number of bits comprised by the second part is twice the number of bits comprised by the second part.

As an embodiment, the second part is carried by a MAC PDU and the first part is carried by physical layer signaling.

As an embodiment, the number of bits comprised by the one identity is not less than 24.

As an embodiment, the one identity is a Link Layer identity (Link Layer ID).

As an embodiment, the one identity is any one of the first identity, the second identity and the third identity.

For one embodiment, the leftmost bit of the identity in FIG. 6 is the most significant bit and the rightmost bit is the least significant bit.

As an embodiment, when said one identity is used for identifying a destination node, said one identity is divided into said first part and said second part.

Practice ofExample 7

Example 7 illustrates yet another schematic of an identity, as shown in fig. 7.

In example 7, an identity comprises a third portion and a fourth portion.

As an embodiment, the number of bits included in the third portion and the number of bits included in the fourth portion are positive integer multiples of 8.

As an embodiment, the number of bits comprised by the third portion is twice the number of bits comprised by the fourth portion.

As an embodiment, the fourth part is carried by a MAC PDU and the third part is carried by physical layer signaling.

As an embodiment, the one identity is a Link Layer identity (Link Layer ID).

For one embodiment, the leftmost bit of the identity in FIG. 7 is the most significant bit and the rightmost bit is the least significant bit.

As an embodiment, when said one identity is used for identifying a source node, said one identity is divided into said third part and said fourth part.

Example 8

Embodiment 8 illustrates a schematic diagram of a MAC PDU according to an embodiment of the present invention, as shown in fig. 8.

In embodiment 8, one MAC PDU includes one MAC Header and at least one MAC sub PDU (sub PDU); the MAC header includes a source identity, a destination identity, and other bits.

As an embodiment, the MAC PDU is transmitted on SL-SCH (SideLink Shared CHannel).

As an embodiment, the number of bits included in the MAC header is fixed.

As an embodiment, the number of bits included in the MAC header is 32.

For one embodiment, the MAC header is a SL-SCH MAC subheader (subheader).

As an embodiment, the further bits comprise 5 fields, V, R, R, R, R, the number of bits comprised being 4, 1, respectively.

As an embodiment, the source identity and the destination identity comprise 16 bits and 8 bits, respectively.

As an embodiment, the source identity in the MAC header and the destination identity in the MAC header are the SRC domain and the DST domain, respectively.

As an embodiment, each MAC sub-PDU includes one MAC sub-header and one MAC SDU, and the MAC sub-header in each MAC sub-PDU includes an LCID field (Logical Channel IDentifier), where the LCID field indicates a Channel identity of a Logical Channel corresponding to the corresponding MAC SDU.

For one embodiment, the LCID field includes 5 bits.

For one embodiment, the LCID field includes 6 bits.

As an example, the MAC PDU in fig. 8 is the first MAC PDU in this application.

As a sub-embodiment of the foregoing embodiment, the channel identity of the first logical channel in this application is an LCID included in a MAC subheader of any MAC sub-PDU in the first MAC PDU.

As an example, the MAC PDU in fig. 8 is the second MAC PDU in this application.

As an example, the MAC PDU in fig. 8 is the target MAC PDU in this application.

Example 9

Embodiment 9 illustrates a mapping scheme of a first identity, a second identity and a third identity according to an embodiment of the present invention, as shown in fig. 9.

As shown in fig. 9, the first signaling includes two fields of source identity and destination identity, the second signaling includes two fields of source identity and destination identity, and the MAC header of the first MAC PDU includes two fields of source identity and destination identity. The source identity and destination identity of the first signaling comprise a first part of the first identity and a third part of the second identity, respectively; the source identity and the destination identity in the MAC header of the first MAC PDU comprise a second part of the first identity and a fourth part of the third identity, respectively; the source identity and destination identity of the second signaling both comprise a first part of the second identity and a third part of the third identity, respectively.

Unlike the conventional scheme in which SCI and MAC PDU together include the link layer identity of one destination node, in embodiment 9, the destination identity of the first signaling and the destination identity in the MAC header of the first MAC PDU come from different node identities. The third node can determine that the first MAC PDU is data from the first node relayed by the second node according to the destination identity of the first signaling and the destination identity in the MAC header of the first MAC PDU, thereby avoiding sending special explicit signaling; on one hand, the spectrum efficiency is improved, and on the other hand, the complexity is reduced (the processing of the third node at the MAC layer and higher layers does not need special processing aiming at the relay data).

As an embodiment, by the above method, the second node and the third node do not even need to establish SRBs and DRBs; for data transmission from the first node to the third node, the method can realize rapid joining/leaving of the second node, further reduce transmission delay and signaling overhead, and improve transmission robustness.

As an embodiment, although the above method modifies the existing method for indicating the destination identity, the MAC layer still needs to match the destination identity with the same length bits to determine whether the first MAC PDU is distributed to the decomposition and demultiplexing entities, and the above method does not cause a significant increase in the false alarm probability; further, the above scheme can obtain a false alarm probability similar to that in the conventional scheme after the collision avoidance mechanism described in embodiment 5 is adopted.

Example 10

Embodiment 10 illustrates a schematic diagram of a third node receiving data according to an embodiment of the invention, as shown in fig. 10.

In embodiment 10, a third node receives a target signaling and a target wireless signal; the target signaling comprises configuration information of a target wireless signal; wherein the target signaling comprises a third portion of a third identity, the target wireless signal comprising a target MAC PDU; the target MAC PDU comprises a second part of the first identity and a fourth part of the third identity; when the target signaling includes either one of the first part of the first identity and the first part of the second identity, the third receiver distributes the target MAC PDU to a disaggregation (Disassembly) and Demultiplexing (Demultiplexing) Entity (Entity), or passes the MAC SDU in the target MAC PDU to an RLC layer.

As an embodiment, when the target signaling includes a first part of a first identity, the target signaling and the target wireless signal are the fifth signaling and a fifth wireless signal, respectively, in this application; when the target signaling comprises a first part of a second identity, the target signaling and the target wireless signal are the second signaling and a second wireless signal, respectively, in this application.

In the conventional scheme, when the SCI and the MAC PDU indicate the link layer identity of a source node together, the third node can perform subsequent processing on the received MAC PDU; in embodiment 10, even if the SCI and the MAC PDU indicate different source identities, the third node may perform subsequent processing on the received MAC PDU.

As an embodiment, although the method modifies the existing method for indicating the source identity, the MAC layer still needs to match the source identity with the same length bits to determine whether the first MAC PDU is distributed to the decomposition and demultiplexing entity, and the method does not cause a significant increase in the false alarm probability; further, the above scheme can obtain a false alarm probability similar to that in the conventional scheme after the collision avoidance mechanism described in embodiment 5 is adopted.

As an embodiment, the third receiver discards the target MAC PDU when the target signaling does not include either of the first part of the first identity and the first part of the second identity.

As an embodiment, when the target signaling does not include either of the first part of the first identity and the first part of the second identity, the third receiver does not distribute the target MAC PDU to a disaggregation (Disassembly) and Demultiplexing (multiplexing) Entity (Entity).

As an embodiment, when the target signaling does not include either of the first part of the first identity and the first part of the second identity, the third receiver does not pass the MAC SDUs in the target MAC PDU to the RLC layer.

As an embodiment, embodiment 10 is applicable to a scenario in which a first node configures a DRB to a third node, and through the same DRB, the third node can receive data directly sent by the first node or data forwarded by a second node, and perform undifferentiated processing (in a MAC sublayer and above sublayers); embodiment 10 can reduce the increase in signaling and complexity caused by configuring a DRB dedicated to relaying.

Example 11

Embodiment 11 illustrates a flow chart of a second node receiving data according to an embodiment of the invention, as shown in fig. 11.

In step S1001, a second node receives a first signaling and a first wireless signal, wherein the first signaling includes configuration information of the first wireless signal, the first signaling includes a first part of a first identity and a third part of a second identity, the first wireless signal includes a first MAC PDU, and the first MAC PDU includes a second part of the first identity; in step S1002, the second node determines whether the first MAC PDU includes a fourth part of the third identity; if the judgment result of S1002 is yes, a second signaling and the second wireless signal are transmitted in step S1003; the second signaling includes configuration information of a second wireless signal, and if the determination result of S1002 is negative, it is determined in step S1004 whether the first MAC PDU includes a fourth part of the second identity; if the judgment result of S1004 is yes, distributing the first MAC PDU to the decomposition and demultiplexing entity in step S1005; if the judgment result of S1004 is negative, the process is ended.

In embodiment 11, the second signaling includes a first part of the second identity and a third part of the third identity, and the second wireless signal includes the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity.

As an embodiment, embodiment 11 is applicable to a scenario in which a first node configures a DRB to a second node.

Example 12

Embodiment 12 illustrates a block diagram of a processing apparatus for use in a first node according to an embodiment of the present application; as shown in fig. 12. In fig. 12, a processing means 1200 in a first node comprises a first transmitter 1201 and a first receiver 1202.

The first transmitter 1201 transmits third signaling, first signaling and a first wireless signal, wherein the first signaling comprises configuration information of the first wireless signal, the first signaling comprises a first part of a first identity and a third part of a second identity, the first wireless signal comprises a first MAC PDU, and the first MAC PDU comprises a second part of the first identity; the first receiver 1202 receives fourth signaling.

In embodiment 12, when the first MAC PDU includes a fourth portion of the third identity, second signaling and a second wireless signal are transmitted; the second signaling comprises configuration information of a second wireless signal; the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity; the first MAC PDU comprises a channel identity of a first logical channel; the third signaling is RRC signaling, the third signaling comprising the channel identity of the first logical channel, the third signaling comprising the third identity; in response to the third signaling not conflicting with a current configuration, the fourth signaling is sent; the fourth signaling indicates that configuration of the third signaling is completed.

For one embodiment, the first transmitter 1201 transmits a fifth signaling and a fifth wireless signal; wherein the fifth signaling comprises configuration information for a fifth wireless signal, the fifth signaling comprising a first portion of the first identity and a third portion of the third identity, the fifth wireless signal comprising a second MAC PDU comprising a second portion of the first identity and the fourth portion of the third identity; the third portion of the third identity and the fourth portion of the third identity constitute the third identity, the second MAC PDU comprising the channel identity of the first logical channel.

For one embodiment, the first transmitter 1201 sends and receives sixth signaling; the first receiver 1202 receives a seventh signaling; wherein the target MAC PDU comprises a channel identity of a first logical channel; the sixth signaling is RRC signaling, the sixth signaling comprising the channel identity of the first logical channel, the sixth signaling comprising at least a first portion of the second identity; in response to the sixth signaling not conflicting with a current configuration, the seventh signaling is sent; the seventh signaling indicates that configuration of the sixth signaling is completed.

As an embodiment, the first signaling and the first radio signal are transmitted on a same psch, the second signaling and the second radio signal are transmitted on a same psch, and the fifth signaling and the fifth radio signal are transmitted on a same psch.

As an embodiment, the third signaling, the fourth signaling, the sixth signaling and the seventh signaling are all sent on a secondary link.

As an embodiment, the third signaling, the fourth signaling, the sixth signaling and the seventh signaling are all transmitted on a psch.

For one embodiment, the first node 1200 is a user equipment.

The first transmitter 1201 includes, for one embodiment, at least one of the antenna 452, the transmitter/receiver 454, the multi-antenna transmitter processor 457, the transmit processor 468, the controller/processor 459, the memory 460, and the data source 467 of fig. 4 of the present application.

The first transmitter 1201 includes, for one embodiment, the antenna 452, the transmitter/receiver 454, the multi-antenna transmitter processor 457, the transmit processor 468, the controller/processor 459, the memory 460, and the data source 467 of fig. 4 of the present application.

For one embodiment, the first receiver 1202 may include at least the first five of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459, the memory 460, and the data source 467 of fig. 4.

For one embodiment, the first receiver 1202 may include at least the first four of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, the controller/processor 459, the memory 460, and the data source 467 of fig. 4.

Example 13

Embodiment 13 illustrates a block diagram of a processing apparatus for use in a second node according to an embodiment of the present application; as shown in fig. 13. In fig. 13, the processing means 1300 in the second node comprises a second receiver 1301 and a second transmitter 1302.

The second receiver 1301 receives the third signaling, the first signaling and the first wireless signal; in response to the third signaling not conflicting with the current configuration, the second transmitter 1302 sends a fourth signaling; the second transmitter 1302 transmits the second signaling and the second wireless signal when the first MAC PDU includes the fourth portion of the third identity.

In embodiment 13, the first signaling includes configuration information of a first wireless signal, the first signaling includes a first part of a first identity and a third part of a second identity, the first wireless signal includes a first MAC PDU, the first MAC PDU includes a second part of the first identity; the second signaling comprises a first portion of the second identity and a third portion of the third identity, the second wireless signal comprising the first MAC PDU; the first portion of the first identity and the second portion of the first identity constitute the first identity, and the third portion of the third identity and the fourth portion of the third identity constitute the third identity; the first MAC PDU comprises a channel identity of a first logical channel; the third signaling is RRC signaling, the third signaling comprising the channel identity of the first logical channel, the third signaling comprising the third identity; the fourth signaling indicates that configuration of the third signaling is completed.

As an embodiment, when the first MAC PDU does not include a fourth part of the third identity and includes a fourth part of the second identity, distributing the first MAC PDU to a disaggregation (Disassembly) and Demultiplexing (multiplexing) Entity (Entity); discarding the first MAC PDU when the first MAC PDU does not include the fourth portion of the third identity and does not include the fourth portion of the second identity.

For one embodiment, the second node 1300 is a user equipment.

For one embodiment, the second transmitter 1302 includes the antenna 420, the transmitter 418, the transmit processor 416, and the controller/processor 475.

For one embodiment, the second transmitter 1302 includes the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, and the controller/processor 475.

For one embodiment, the second receiver 1301 includes the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, and the controller/processor 475.

For one embodiment, the second receiver 1301 includes the controller/processor 475.

Example 14

Embodiment 14 illustrates a block diagram of a processing apparatus for use in a third node according to an embodiment of the present application; as shown in fig. 14. In fig. 14, the processing means 1400 in the third node comprises a third receiver 1401 and a third transmitter 1402.

The third receiver 1401 receives sixth signaling, target signaling, and target wireless signals; the target signaling comprises configuration information of a target wireless signal; in response to the sixth signaling not conflicting with the current configuration, the third transmitter 1402 sends seventh signaling.

In embodiment 14, the target signaling comprises a third portion of a third identity, the target wireless signal comprises a target MAC PDU; the target MAC PDU comprises a second part of the first identity and a fourth part of the third identity; the target MAC PDU comprises a channel identity of a first logical channel; the sixth signaling is RRC signaling, the sixth signaling comprising the channel identity of the first logical channel, the sixth signaling comprising at least a first portion of the second identity; the seventh signaling indicates that configuration of the sixth signaling is completed.

As an embodiment, when the target signaling includes any one of the first part of the first identity and the first part of the second identity, the third receiver 1401 distributes the target MAC PDU to a Disassembly (Disassembly) and Demultiplexing (multiplexing) Entity (Entity).

As an embodiment, when the target signaling includes either one of the first part of the first identity and the first part of the second identity, the MAC SDU in the target MAC PDU is delivered to the RLC layer.

For one embodiment, the third node 1400 is a user equipment.

For one embodiment, the third transmitter 1402 includes the antenna 420, the transmitter 418, the transmit processor 416, and the controller/processor 475.

For one embodiment, the third transmitter 1402 includes the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, and the controller/processor 475.

For one embodiment, the third receiver 1401 comprises the antenna 420, the receiver 418, the multi-antenna receive processor 472, the receive processor 470, and the controller/processor 475.

For one embodiment, the third receiver 1401 includes the controller/processor 475.

It will be understood by those skilled in the art that all or part of the steps of the above methods may be implemented by instructing relevant hardware through a program, and the program may be stored in a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented by using one or more integrated circuits. Accordingly, the module units in the above embodiments may be implemented in a hardware form, or may be implemented in a form of software functional modules, and the present application is not limited to any specific form of combination of software and hardware. User equipment, terminal and UE in this application include but not limited to unmanned aerial vehicle, Communication module on the unmanned aerial vehicle, remote control plane, the aircraft, small aircraft, the cell-phone, the panel computer, the notebook, vehicle-mounted Communication equipment, wireless sensor, network card, thing networking terminal, the RFID terminal, NB-IOT terminal, Machine Type Communication (MTC) terminal, eMTC (enhanced MTC) terminal, the data card, network card, vehicle-mounted Communication equipment, low-cost cell-phone, wireless Communication equipment such as low-cost panel computer. The base station or the system device in the present application includes, but is not limited to, a macro cell base station, a micro cell base station, a home base station, a relay base station, a gNB (NR node B) NR node B, a TRP (Transmitter Receiver Point), and other wireless communication devices.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like 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 for wireless communication, comprising:

2. The first node of claim 1, comprising:

the first transmitter transmits a third signaling;

3. The first node of claim 2, comprising:

a first receiver that receives the fourth signaling;

4. The first node according to any of claims 1 to 3, comprising:

the first transmitter transmits a fifth signaling and a fifth wireless signal;

5. A second node for wireless communication, comprising:

6. The second node of claim 5, comprising:

the second receiver receives a third signaling;

7. The second node of claim 6, comprising:

8. The second node according to any of claims 5 to 7, comprising:

9. The second node according to any of claims 5-8, wherein the first identity, the second identity and the third identity each comprise 24 bits.

10. The second node of claim 9, wherein the first portion, the second portion, the third portion, and the fourth portion respectively comprise 8 Least Significant Bits (LSBs), 16 Most Significant Bits (MSBs), 16 least significant bits, and 8 most significant bits of the respective identity.

11. A third node for wireless communication, comprising:

12. The third node of claim 11, comprising:

the third receiver receives a sixth signaling;

13. The third node of claim 12, comprising:

a third transmitter for transmitting a seventh signaling;