CN116438915A

CN116438915A - Method and apparatus for use in relay wireless communication

Info

Publication number: CN116438915A
Application number: CN202280007349.0A
Authority: CN
Inventors: 张锦芳; 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2021-09-27
Filing date: 2022-09-23
Publication date: 2023-07-14
Also published as: WO2023046075A1

Abstract

A method and apparatus for use in relay wireless communications is disclosed. The first node receives a first message through a downlink, wherein the first message is used for triggering a second message; transmitting the second message over a sidelink, the second message being used to instruct stopping the first timer; wherein the time of the first timer in the running state belongs to active time, and the second message is a MACCE. The method and the device achieve the beneficial effect of effective power saving by cooperatively controlling the DRX related timer of the remote node through the base station and the relay.

Description

Method and apparatus for use in relay wireless communication

Technical Field

The present application relates to methods and apparatus in wireless communication systems, and more particularly, to methods and apparatus for supporting discontinuous reception at a remote node in relay wireless communications.

Background

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

Discontinuous reception (Discontinuous Reception, DRX) is a common method in cellular communication, which can reduce power consumption of a communication terminal and increase standby time. The base station controls a timer related to DRX through DCI (Downlink Control Information) or MAC (Medium Access Control, media access Control) CE (Control Element), so as to further Control whether the terminal is in active time in a given time slot or subframe, and further Control wireless reception of the communication terminal, including monitoring and receiving wireless signals by the terminal when the terminal is in active time; when the terminal is in the inactive time, the terminal stops monitoring the wireless signal.

Future wireless communication systems have more and more diversified application scenes, and different application scenes have different performance requirements on the system. To meet different performance requirements of various application scenarios, a study on NR (New Radio, new air interface) technology (or Fifth Generation, 5G) is decided at 3GPP (3 rd Generation Partner Project, third Generation partnership project) RAN (Radio Access Network ) #72 times, and a standardization Work for NR is started at 3GPP RAN #75 times through WI (Work Item) of NR. For V2X (Vehicle-to-evolution) services, which are rapidly evolving, 3GPP has also begun to initiate the standard formulation and research work of SL (Sidelink) under the NR framework. In the car networking service, besides the car-mounted terminal, there are roadside pedestrian handheld terminals, the handheld terminals are limited in power and sensitive to power consumption, so that standardized work for NRV2X DRX starting WI is determined on the 3GPP RAN #86 full meeting; at the same time, it is decided to start the SI (Study Item) standardization work for the NR SL Relay.

Disclosure of Invention

The inventor finds through research that, in Layer 2 (Layer 2/L2) relay communication of U2N (UE-to-Network), a relay node forwards downlink data sent by a Network, and meanwhile, the relay node and the UE may also have D2D (Device-to-Device) service, so that the relay node cannot effectively perform DRX control on the UE. On the other hand, if the relay node adopts the resource allocation method of mode 2 (mode 2) to transmit on the sidelink, the base station cannot effectively perform DRX control on the UE because the base station does not have sidelink transmission information. How to realize the DRX control of the UE through the cooperation of the base station and the relay needs to be studied. In view of the above problems, the present application discloses a solution for implementing DRX control of a UE through cooperation of a base station and a relay. The embodiments of the present application and features in the embodiments may be combined with each other arbitrarily without conflict. Further, although the present application is initially directed to a U2N relay scenario, the present application is also applicable to a U2U (UE-to-UE ) relay scenario, and an IAB (Integrated Access and Backhaul, integrated access backhaul) relay scenario, to achieve technical effects similar to those in a U2N scenario. Furthermore, the adoption of a unified solution for different scenarios (including but not limited to U2N relay scenario and U2U communication scenario) also helps to reduce hardware complexity and cost. In particular, the term (Terminology), noun, function, variable in this application may be interpreted (if not specifically stated) with reference to the definitions in the 3GPP specification protocols TS36 series, TS38 series, TS37 series.

The application discloses a method used in a first node of wireless communication, comprising the following steps:

receiving a first message over a downlink, the first message being used to trigger a second message;

transmitting the second message over a sidelink, the second message being used to instruct stopping the first timer;

wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE.

As an embodiment, the present application is applicable to L2 relay transmission of U2N.

As one embodiment, the L2 relay transmission of U2N includes an uplink relay transmission from a UE to a Network and/or a downlink relay transmission from a Network-to-UE (Network-to-UE).

As an embodiment, the present application is applicable to a scenario where one relay node serves at least one UE.

As an embodiment, the application is applicable to a scenario where there is only network traffic and both network traffic and D2D traffic on the sidelink between the relay node and the UE.

As one embodiment, the problem to be solved by the present application is: when the base station cannot acquire the transmission state of the auxiliary link and the relay node cannot acquire whether the base station has downlink data forwarding, how to realize DRX control for a certain UE.

As an embodiment, the D2D service is a generic name, and may include D2D service, V2X service, public security service, etc.

As one embodiment, the solution of the present application comprises: when a base station determines that one UE does not have subsequent downlink data transmission, a first message is sent to a relay node, and the relay node determines whether to send a second message to the UE according to the first message and a sidelink transmission condition aiming at the UE; the second message is used to control a DRX-related timer of the UE.

As one embodiment, the beneficial effects of the present application include: the information of the base station and the relay node is comprehensively utilized, meanwhile, the timer related to the DRX of the UE is controlled according to the downlink data transmission and the auxiliary link data transmission, and the UE can effectively obtain the electricity-saving beneficial effect.

According to one aspect of the present application, there is provided:

a third message is sent over the uplink, the third message being used to trigger the first message.

As an embodiment, the indication to the second node is indicated when the first node has no subsequent data unit transmission for the recipient of the second message.

According to one aspect of the present application, there is provided:

Transmitting at least one data unit over the sidelink after receiving the first message;

wherein the phrase that the first message is used to trigger a second message includes: the sending of the second message is triggered after receiving the first message and after completing the transmission of the at least one data unit.

As an embodiment, the indication to the first node is indicated when the second node has no subsequent data unit transmission for the recipient of the second message.

According to one aspect of the present application, there is provided:

the at least one data unit is generated at a higher layer of the first node or at a sender of the first message.

As an embodiment, the at least one data unit may be a data unit sent by the sender of the first message and forwarded by the first node to the receiver of the second message, or may be a data unit generated by the first node for the receiver of the second message.

According to one aspect of the present application, there is provided:

the first message includes at least a portion of bits of a first identification, the first identification being used to identify a recipient of the second message.

As an embodiment, when the first node is a relay node of a plurality of remote nodes, at least part of the bits of the first message including the identity of the recipient of the second message may indicate the intended recipient of the second message.

According to one aspect of the present application, there is provided:

the receiver of the second message performs monitoring for the sidelink at the active time.

According to one aspect of the present application, there is provided:

the first message is not used to indicate to stop a second timer maintained at the first node.

The application discloses a method used in a second node of wireless communication, comprising the following steps: transmitting a first message over a downlink, the first message being used to trigger a second message;

wherein the second message is sent over a sidelink, the second message being used to instruct stopping the first timer; the time of the first timer in the running state belongs to the active time, and the second message is a MAC CE.

According to one aspect of the present application, there is provided:

a third message is received over the uplink, the third message being used to trigger the first message.

According to one aspect of the present application, there is provided:

after transmitting the first message, at least one data unit is transmitted over the sidelink; wherein the phrase that the first message is used to trigger a second message includes: the transmission of the second message is triggered after the transmission of the first message and after the transmission of the at least one data unit is completed.

According to one aspect of the present application, there is provided:

The application discloses a first node used for wireless communication, which is characterized by comprising:

A first receiver for receiving a first message via a downlink, the first message being used to trigger a second message;

a first transmitter for transmitting the second message over a sidelink, the second message being used to instruct stopping of the first timer;

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

a second transmitter for transmitting a first message via a downlink, the first message being used to trigger a second message;

Drawings

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

fig. 1 illustrates a transmission flow diagram of a first node according to one embodiment of the present application;

FIG. 2 illustrates a schematic diagram of a network architecture according to one embodiment of the present application;

Fig. 3 illustrates a schematic diagram of a wireless protocol architecture of a user plane and a control plane according to one embodiment of the present application;

FIG. 4 illustrates a hardware module schematic of a communication device according to one embodiment of the present application;

fig. 5 illustrates a wireless signal transmission flow diagram according to one embodiment of the present application;

fig. 6 illustrates another wireless signal transmission flow diagram according to one embodiment of the present application;

FIG. 7 illustrates a schematic diagram of a relationship of a first node, a second node, and a third node according to one embodiment of the present application;

fig. 8 illustrates a wireless protocol architecture diagram of relay transmissions according to one embodiment of the present application;

FIG. 9 illustrates a first message diagram according to one embodiment of the present application;

FIG. 10 illustrates a block diagram of a processing device in a first node according to one embodiment of the present application;

fig. 11 illustrates a block diagram of a processing arrangement in a second node according to an embodiment of the present application.

Detailed Description

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

Example 1

Embodiment 1 illustrates a transmission flow diagram of a first node according to one embodiment of the present application, as shown in fig. 1.

In embodiment 1, the first node 100 receives a first message over the downlink in step 101, the first message being used to trigger a second message; transmitting the second message over a sidelink in step 102, the second message being used to instruct stopping the first timer; wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE.

As one embodiment, a first message is received over a downlink, the first message being used to trigger a second message.

As one embodiment, the downlink is a base station to UE wireless link.

As an embodiment, the first message is RRC (Radio Resource Control ) layer signaling.

As an embodiment, the first message is a MAC (Medium Access Control, media access Control) CE (Control Element).

As an embodiment, the name of the first message includes DRX.

As an embodiment, the name of the first message includes a Relay.

As an embodiment, the name of the first message includes Remote.

As an embodiment, the first message is Relay DRX Command (relay DRX command) MAC CE.

As an embodiment, the first message is Relay Long DRX Command (relay long DRX command) MAC CE.

As an embodiment, the first message is Remote DRX Command (remote DRX command) MAC CE.

As an embodiment, the first message is Remote Long DRX Command (remote long DRX command) MAC CE.

As an embodiment, the first message indicates that the first timer does not need to run for the transmission needs of the sender of the first message.

As one embodiment, the first message indicates that the sender of the first message allows the first timer to be released.

As one embodiment, the first message indicates that the sender of the first message has no subsequent data unit transmission for the receiver of the second message.

As one embodiment, the first message indicates that the sender of the first message does not cache data units for the receiver of the second message.

As an embodiment, the data unit is a MAC SDU (Service Data Unit, traffic data unit).

As an embodiment, the data unit is a MAC SDU segment (segment).

As an embodiment, the data unit is an RLC (Radio Link Control ) SDU.

As an embodiment, the data unit is a PDCP (Packet Data Convergence Protocol ) SDU.

As an embodiment, the data unit comprises at least one byte.

As an embodiment, the data unit comprises application layer (application layer) data.

As an embodiment, the data unit comprises RRC layer signaling.

As an embodiment, the data unit comprises NAS (Non-access stratum) signaling.

As an embodiment, the data unit belongs to the CCCH (Common Control CHannel ).

As an embodiment, the data unit belongs to DCCH (Dedicated Control CHannel ).

As an embodiment, the data unit belongs to the DTCH (Dedicated Traffic CHannel ).

As an embodiment, the data unit belongs to the MCCH (Multicast Control CHannel ).

As an embodiment, the data unit belongs to the MTCH (MulticastTraffic CHannel ).

As an embodiment, the second message is a MAC CE.

As an embodiment, the second message is an SLDRX Command (sidelink DRX Command) MAC CE.

As an embodiment, the second message is SLLong DRX Command (sidelink long DRX command) MAC CE.

As an embodiment, the second message is sent over a sidelink, the second message being used to instruct to stop the first timer.

As one embodiment, the sidelink is a UE-to-UE wireless link.

As an embodiment, the first timer is maintained at a third node in the present application.

As an embodiment, the first timer is maintained at the MAC sublayer of the third node in the present application.

As an embodiment, the first timer is an sl-DRX-onduration timer (sidelink DRX duration timer).

As an embodiment, the first timer is an sl-DRX-inactivity timer.

In one embodiment, the first timer is stopped in response to receiving the second message.

As an embodiment, the second message is used to indicate the use of DRX cycle.

As an embodiment, as a response to receiving the second message, use is made of (use) DRX cycle.

As an embodiment, as a response to receiving the second message, (use) a Long DRX cycle is used.

As an embodiment, the time of the first timer in the running state belongs to an active time.

As an embodiment, the time of the first timer in the running state belongs to the active time of the third node in the present application.

Example 2

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

The wireless 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, evolved packet core) 210, hss (Home Subscriber Server )/UDM (Unified Data Management, unified data management) 220, proSe function 250, and ProSe application server 230. The wireless communication architecture may be interconnected with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the wireless 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 bs (gnbs) 203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gNB203 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), TRP (transmit receive node), or some other suitable terminology, and in an NTN network, the gNB203 may be a satellite, an aircraft, or a terrestrial base station relayed through a satellite. The gNB203 provides the UE201 with an access point to the 5GC/EPC210. Examples of UE201 include a cellular telephone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, an drone, an aircraft, a narrowband internet of things device, a machine-type communications device, a land vehicle, an automobile, an in-vehicle device, an in-vehicle communications unit, a wearable device, or any other similar functional device. Those of skill in the art may also refer to the 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. gNB203 is connected to 5GC/EPC210 through an S1/NG interface. The 5GC/EPC210 includes MME (Mobility Management Entity )/AMF (Authentication Management Field, authentication management domain)/SMF (Session Management Function ) 211, other MME/AMF/SMF214, S-GW (Service Gateway)/UPF (User Plane Function ) 212, and P-GW (Packet Date Network Gateway, packet data network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC210. 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/UPF213. The P-GW provides UE IP address assignment as well as other functions. The P-GW/UPF213 is connected to internet services. Internet services include operator-corresponding internet protocol services, which may include, in particular, internet, intranet, IMS (IP Multimedia Subsystem ) and PS (Packet Switching) streaming services. The ProSe function 250 is a logic function for network related behavior required for Proximity-based services (ProSe); including DPF (Direct Provisioning Function ), direct discovery name management function (Direct Discovery Name Management Function), EPC level discovery ProSe function (EPC-level Discovery ProSe Function), etc. The ProSe application server 230 has functions of storing EPC ProSe user identities, mapping between application layer user identities and EPC ProSe user identities, etc.

As an embodiment, the UE241 corresponds to a third node in the present application.

As an embodiment, the UE201 corresponds to a first node in the present application.

As an embodiment, the gNB203 corresponds to a second node in the present application.

As an embodiment, the UE201 and the UE241 support SL transmission, respectively.

As an embodiment, the UE201 and the UE241 support PC5 interfaces, respectively.

As an embodiment, the UE201 and the UE241 support relay transmission, respectively.

As an embodiment, the UE201 and the UE241 support the internet of vehicles, respectively.

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

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

As an embodiment, the UE201 and the UE241 support public security services, respectively.

As an embodiment, the gNB203 supports relay transmissions.

As an embodiment, the gNB203 supports internet of vehicles.

As an embodiment, the gNB203 supports V2X traffic.

As an embodiment, the gNB203 supports D2D traffic.

As an embodiment, the gNB203 supports public security services.

As one example, the gNB203 is a macro Cell (Marco Cell) base station.

As one example, the gNB203 is a Micro Cell (Micro Cell) base station.

As an example, the gNB203 is a Pico Cell (Pico Cell) base station.

As an example, the gNB203 is a home base station (Femtocell).

As an embodiment, the gNB203 is a base station device supporting a large delay difference.

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

As one embodiment, the gNB203 is a satellite device.

As an embodiment, the radio link from the UE201 to the gNB203 is an uplink.

As an embodiment, the radio link from the gNB203 to the UE201 is a downlink.

As an embodiment, the radio link between the UE201 and the UE241 is a sidelink.

As an embodiment, the UE201 and the gNB203 are connected through a Uu interface.

As an embodiment, the UE201 and the UE241 are connected through a PC5 Reference Point (Reference Point).

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

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

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

Example 3

Embodiment 3 illustrates a schematic diagram of a wireless protocol architecture of a user plane and a control plane according to one embodiment of 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 shows the radio protocol architecture of the control plane 300 for a UE and a gNB with 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 PHY301. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the UE and the gNB through PHY301. The L2 layer 305 includes a MAC (Medium Access Control ) sublayer 302, an RLC (Radio Link Control, radio link layer control protocol) sublayer 303, and a PDCP (Packet Data Convergence Protocol ) sublayer 304, which terminate at the gNB on the network side. The PDCP sublayer 304 provides data ciphering and integrity protection, and the PDCP sublayer 304 also provides handover support for UEs between gnbs. The RLC sublayer 303 provides segmentation and reassembly of data packets, retransmission of lost data packets by ARQ, and 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 the various radio resources (e.g., resource blocks) in one cell among the 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. 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 is substantially the same for the physical layer 351, PDCP sublayer 354 in the L2 layer 355, RLC sublayer 353 in the L2 layer 355, and 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 data packets to reduce radio transmission overhead. Also included in the L2 layer 355 in the user plane 350 is an SDAP (Service Data Adaptation Protocol ) sublayer 356, the SDAP sublayer 356 being responsible for mapping between QoS flows and data radio bearers (DRBs, data Radio Bearer) to support diversity of traffic. The radio protocol architecture of the UE in the user plane 350 may include some or all of the SDAP sublayer 356, pdcp sublayer 354, rlc sublayer 353 and MAC sublayer 352 at the L2 layer. Although not shown, the UE may also 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., remote UE, server, etc.).

As an embodiment, the wireless protocol architecture in fig. 3 is applicable to the first node in the present application.

As an embodiment, the wireless protocol architecture in fig. 3 is applicable to the second node in the present application.

As an embodiment, the wireless protocol architecture in fig. 3 is applicable to the third node in the present application.

As an embodiment, the first message in the present application is generated in the RRC306.

As an embodiment, the first message in the present application is generated in the MAC302 or the MAC352.

As an embodiment, the second message in the present application is generated in the MAC302 or the MAC352.

As an embodiment, the third message in the present application is generated in the RRC306.

As an embodiment, the third message in the present application is generated in the MAC302 or the MAC352.

As an embodiment, the at least one data unit in the present application is generated in the RRC306.

As an embodiment, the at least one data unit in the present application is generated in the PDCP304 or the PDCP354.

As an embodiment, the at least one data unit in the present application is generated in the RLC303 or RLC353.

As an embodiment, the at least one data unit in the present application is generated in the MAC302 or the MAC352.

As an embodiment, the

L2 layer

305 or 355 belongs to a higher layer.

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

Example 4

Embodiment 4 illustrates a hardware module schematic of a communication device 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 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.

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.

In the transmission from the second communication device 410 to the first communication device 450, upper layer packets from the core network or upper layer packets from the data source 477 are provided to the controller/processor 475 at the second communication device 410. The core network and data source 477 represent all 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, a 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 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., physical layer). Transmit processor 416 performs coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal clusters based on various modulation schemes, e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM). The multi-antenna transmit processor 471 digitally space-precodes the coded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. A transmit processor 416 then maps each spatial stream to a subcarrier, 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 a physical channel carrying the time domain multicarrier symbol stream. 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 multiple antenna transmit processor 471 to a radio frequency stream and then provides it to a different antenna 420.

In a transmission from the second communication device 410 to the first communication device 450, each receiver 454 receives a signal at the first communication device 450 through its respective antenna 452. Each receiver 454 recovers information modulated onto a radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream that is provided to a receive processor 456. The receive processor 456 and the multi-antenna receive processor 458 implement various signal processing functions for 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. The receive processor 456 converts the baseband multicarrier symbol stream after receiving the 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 signal and the reference signal are demultiplexed by the receive processor 456, wherein the reference signal is to be used for channel estimation, and the data signal is subjected to multi-antenna detection in the multi-antenna receive processor 458 to recover any spatial stream destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in 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 that were 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. 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 higher layer data packets from the second communication device 410. The upper layer packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

In the transmission from the first communication device 450 to the second communication device 410, an upper layer data packet is provided to a controller/processor 459 at the first communication device 450 using a data source 467. Data source 467 represents all protocol layers above the L2 layer. Similar to the transmit functions 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, implementing L2 layer functions for the user and control planes. The controller/processor 459 is also responsible for retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping, channel coding, and digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming, with the multi-antenna transmit processor 457 performing digital multi-antenna spatial precoding, after which the transmit processor 468 modulates the resulting spatial stream into a multi-carrier/single-carrier symbol stream, which is analog precoded/beamformed in the multi-antenna transmit processor 457 before being provided to the different antennas 452 via the transmitter 454. 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 it to an antenna 452.

In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function 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 radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals to baseband signals, and provides the baseband signals to a multi-antenna receive processor 472 and a receive processor 470. The receive processor 470 and the multi-antenna receive processor 472 collectively implement the functions of the L1 layer. The controller/processor 475 implements L2 layer functions. The controller/processor 475 may be associated with a memory 476 that stores program codes and data. Memory 476 may 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 demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover upper layer data packets from the first communication device 450. Upper layer packets from the controller/processor 475 may be provided to all protocol layers above the core network or L2 layer, and various control signals may also be provided to the core network or L3 for L3 processing.

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 are configured to, with the at least one processor, cause the apparatus of the first communication device 450 to at least: receiving a first message over a downlink, the first message being used to trigger a second message; transmitting the second message over a sidelink, the second message being used to instruct stopping the first timer; wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE.

As an embodiment, the first communication device 450 apparatus includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: receiving a first message over a downlink, the first message being used to trigger a second message; transmitting the second message over a sidelink, the second message being used to instruct stopping the first timer; wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE.

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 to, with the at least one processor, cause the apparatus of the first communication device 450 to at least: transmitting a first message over a downlink, the first message being used to trigger a second message; wherein the second message is sent over a sidelink, the second message being used to instruct stopping the first timer; the time of the first timer in the running state belongs to the active time, and the second message is a MAC CE.

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, produce acts comprising: transmitting a first message over a downlink, the first message being used to trigger a second message; wherein the second message is sent over a sidelink, the second message being used to instruct stopping the first timer; the time of the first timer in the running state belongs to the active time, and the second message is a MAC CE.

As an 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.

As an 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.

As an embodiment, the first communication device 450 is a relay node.

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

As an embodiment, the first communication device 450 is an RSU.

As an embodiment, the second communication device 410 is a base station.

As an embodiment, the second communication device 410 is an RSU.

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

As an embodiment, the second communication device 410 is a relay node.

As one embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416, and the controller/processor 475 is used to transmit the first message of the present application.

As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456, and the controller/processor 459 is configured to receive a first message in the present application.

As one 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 a second message in this application.

As an example, the antenna 420, the receiver 418, the multi-antenna receive processor 472, at least one of the receive processor 470 or the controller/processor 475 are used to receive the second message in the present application.

As one 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 a third message in this application.

As an example, the antenna 420, the receiver 418, the multi-antenna receive processor 472, at least one of the receive processor 470 or the controller/processor 475 are used to receive the third message in the present application.

As one 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 transmit at least one data unit in the present application.

As an example, the antenna 420, the receiver 418, the multi-antenna receive processor 472, at least one of the receive processor 470 or the controller/processor 475 are used to receive at least one data unit in the present application.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow diagram according to one embodiment of the present application, as shown in fig. 5. In fig. 5, the transmission between the second node and the first node is via the Uu air interface; and the first node and the third node are transmitted through a PC5 air interface.

For the followingThird node U51Receiving a second message in step S511; stopping the first in step S512A timer.

For the followingFirst node U52Transmitting a third message in step S521; receiving a first message in step S522; the second message is transmitted in step S523.

For the followingSecond node N53Receiving a third message in step S531; the first message is sent in step S532.

In embodiment 5, a first message is received over a downlink, the first message being used to trigger a second message; transmitting the second message over a sidelink, the second message being used to instruct stopping the first timer; wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE; transmitting a third message over the uplink, the third message being used to trigger the first message; the first message includes at least a portion of bits of a first identification, the first identification being used to identify a recipient of the second message; the receiver of the second message performs monitoring for the sidelink at the active time; the first message is not used to indicate to stop a second timer maintained at the first node.

As an embodiment, the second node is a serving cell of the first node.

As an embodiment, the second node is a serving base station of the first node.

As an embodiment, the second node is the sender of the first message.

As an embodiment, the third node is a recipient of the second message.

As an embodiment, the second node is the recipient of the third message.

As one embodiment, the first node is a relay node for communication between the third node and the second node; the third node sends uplink data to the second node through the first node; and the second node sends downlink data to the third node through the first node.

As an embodiment, the third node and the second node do not communicate directly.

As an embodiment, the third node may have not only network service but also D2D service; wherein the network traffic terminates at the second node over an air interface; the D2D traffic terminates at the first node over the air.

As an embodiment, a third message is sent over the uplink, which third message is used to trigger the first message.

As one embodiment, the third message indicates that the first node has no subsequent data unit transmissions for the recipient of the second message.

As an embodiment, the third message indicates that the first node does not cache data units for the third node.

As an embodiment, the third message indicates that the first timer does not need to run for the transmission needs of the first node.

As an embodiment, the third message indicates that the first node allows the first timer to be released.

As one embodiment, the phrase that the third message is used to trigger the first message includes: in response to receiving the third message, a recipient of the third message sends the first message.

As a sub-embodiment of the above embodiment, the receiver of the third message has no subsequent data unit transmission for the third node.

As an embodiment, the third message is RRC layer signaling.

As an embodiment, the third message is a MAC CE.

As an embodiment, the third message comprises at least part of bits of a first identification, which is used to identify the recipient of the second message.

As an embodiment, the at least part of the bits of the first identity included in the third message are identical to the at least part of the bits of the first identity included in the first message.

As one embodiment, the phrase that the first message is used to trigger the second message includes: in response to receiving the first message, the acts are performed by sending the second message over a sidelink.

As an embodiment, the third message is sent over the uplink, the third message being used to trigger the first message; and in response to receiving the first message, sending the second message through the sidelink.

As an embodiment, the first node does not send a data unit to the third node after sending the third message and before sending the second message.

As one embodiment, after the first node determines that no data unit is transmitted for the third node, the first node sends the third message to indicate to the second node; if the second node does not have a subsequent data unit transmission for the third node, the second node sends the first message indicating that no subsequent downstream data unit needs to be forwarded by the first node; the first node sends the second message indicating to stop the first timer.

As an embodiment, the third message indicates that the first node allows the first timer to be released; the first message indicates that the second node allows the first timer to be released; when both the first node and the second node allow the first timer to be released, the first node sends the second message to release the first timer.

As an embodiment, the above method informs the base station that there is no sidelink transmission for a remote node through the relay node, if the base station indicates that there is no downlink data for the remote node to be forwarded through the relay node, the relay node may send an indication to stop the DRX related timer for the remote node, so as to achieve the beneficial effect of saving power.

As an embodiment, the first message comprises at least part of the bits of a first identification, which is used to identify the recipient of the second message.

As an embodiment, the first message comprises the first identification, which is used to identify the recipient of the second message.

As an embodiment, the first identity uniquely identifies the third node within the serving cell.

As an embodiment, the first identifier uniquely identifies the third node within the first node.

As an embodiment, the first identity is assigned by the second node.

As an embodiment, the first identity is assigned by the first node.

As an embodiment, the first identity is used for L2relay.

As an embodiment, the at least part of the bits of the first identification are carried in a data unit forwarded by the first node.

As an embodiment, the at least part of the bits of the first identification are carried in an adaptation (ADAPT) sublayer sub-header.

As an embodiment, the first identity is a C-RNTI (Cell-Radio Network Temporary Identifier, cell radio network temporary identity).

As an embodiment, the first identity is a local remote user identity (Local remote UE ID).

As an embodiment, the first identity is a temporary remote user identity (Temporary remote UE ID).

As an embodiment, the first identity is a layer 2 identity.

As an embodiment, the first identifier is a link layer identifier.

As an embodiment, the first flag includes a number of bits that is an integer multiple of 8.

As an embodiment, the first flag comprises 16 bits.

As an embodiment, the first flag comprises 32 bits.

As an embodiment, the first flag comprises 40 bits.

As an embodiment, the at least part of the bits of the first identification comprise the lower 8 bits of the first identification.

As an embodiment, the at least part of the bits of the first identification comprise the lower 16 bits of the first identification.

As an embodiment, the at least part of the bits of the first identification comprise the upper 8 bits of the first identification.

As an embodiment, the at least part of the bits of the first identification comprise the upper 16 bits of the first identification.

As an embodiment, the at least part of the bits of the first flag comprise all bits of the first flag.

As an embodiment, the third node performs monitoring for the sidelink at the active time.

As one embodiment, the third node is at the active time when the first timer is running.

As an embodiment, the third node is in an inactive time on the sidelink when none of the sl-DRX-OnDurationTimer(s) (sidelink DRX duration timer), sl-DRX-InactivityTimer(s) (sidelink DRX inactivity timer), or sl-DRX-RetransmissionTimer(s) (sidelink DRX retransmission timer) is running.

As an embodiment, the third node stops monitoring the sidelink at the inactive time.

As one embodiment, the monitoring means includes searching.

As an embodiment, the monitoring means includes monitoring (monitor).

As one embodiment, the phrase performing monitoring for the sidelink includes: whether there is sidelink communication is determined by energy monitoring.

As one embodiment, the phrase performing monitoring for the sidelink includes: sensing measurement for mode 2 resource allocation pattern.

As one embodiment, the phrase performing monitoring for the sidelink includes: it is determined whether there is a PSCCH for the third node by blind decoding detection.

As one embodiment, the phrase performing monitoring for the sidelink includes: at the PSFCH (Physical Sidelink Feedback CHannel ) resource monitoring is performed for the presence of a feedback signal.

As an embodiment, the first message is not used to indicate that the second timer is stopped.

As an embodiment, the logical channel identity (Logical Channel Identity, LCID) of the first message is different from the logical channel identity of the fourth message; wherein the first message is a MAC CE.

As a sub-embodiment of the foregoing embodiment, the logical channel identity of the first message is carried in a MAC sub-header (sub-header), and the MAC sub-header and the MAC CE form a MAC sub-pdu (sub-protocol data unit).

As an embodiment, the fourth message is used to instruct to stop the second timer.

As an embodiment, the logical channel identity of the first message is a positive integer between 35 and 46 including 35 and 46.

As an embodiment, the fourth message is DRX commandMAC CE.

As an embodiment, the fourth message is Long DRX command MAC CE.

As an embodiment, the fourth message comprises only a MAC subheader.

As an embodiment, the logical channel identity of the fourth message is 59.

As an embodiment, the logical channel identity of the fourth message is 60.

As an embodiment, the fourth message indicates that the second node has no subsequent data unit transmissions for the first node.

As an embodiment, the fourth message indicates that the second timer does not need to run for the transmission needs of the second node.

As one embodiment, the second timer is maintained at the first node.

As an embodiment, the second timer is maintained at a MAC sublayer of the first node.

As an embodiment, the second timer is a DRX-onduration timer (DRX duration timer).

As an embodiment, the second timer is a DRX-inactivity timer.

As an embodiment, the time of the second timer in the running state belongs to the active time of the first node; the first node performs monitoring of the downlink at the active time.

As an embodiment, a third receiver receives the second message; in response to receiving the second message, the first timer is stopped.

Example 6

Embodiment 6 illustrates another wireless signal transmission flow diagram according to one embodiment of the present application, as shown in fig. 6. In fig. 6, the transmission between the second node and the first node is via the Uu air interface; and the first node and the third node are transmitted through a PC5 air interface.

For the followingThird node U61Receiving at least one data unit in step S611; receiving a second message in step S612; the first timer is stopped in step S613.

For the followingFirst node U62Receiving a first message in step S621; transmitting at least one data unit in step S622; the second message is sent in step S623.

For the followingSecond node N63The first message is sent in step S631.

In embodiment 6, a first message is received over a downlink, the first message being used to trigger a second message; transmitting the second message over a sidelink, the second message being used to instruct stopping the first timer; wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE; transmitting at least one data unit over the sidelink after receiving the first message; wherein the phrase that the first message is used to trigger a second message includes: after receiving the first message and after completing the transmission of the at least one data unit, the sending of the second message is triggered; the at least one data unit is generated at a higher layer of the first node or at a sender of the first message; the first message includes at least a portion of bits of a first identification, the first identification being used to identify a recipient of the second message; the receiver of the second message performs monitoring for the sidelink at the active time; the first message is not used to indicate to stop a second timer maintained at the first node.

Steps S631, S621, S623, S612, S613 in embodiment 6 are the same as the corresponding steps in embodiment 5, and will not be described here.

As an embodiment, after receiving the first message, at least one data unit is sent over the sidelink.

As one embodiment, the first node caches data units for the third node after receiving the first message and before sending the second message.

As one embodiment, the phrase that the first message is used to trigger the second message includes: the sending of the second message is triggered after receiving the first message and after completing the transmission of the at least one data unit.

As an embodiment, the first node does not buffer data units for the third node after the at least one data unit transmission is completed.

As an embodiment, after the at least one data unit transmission is completed, the first node has no subsequent data units for the third node.

As an embodiment, the first node determines that the first timer does not need to be run for the first node after the at least one data unit transmission is completed.

As an embodiment, the data unit belongs to a SCCH (Sidelink Control CHannel ).

As an embodiment, the data unit belongs to an STCH (Sidelink Traffic CHannel ).

As one embodiment, the first node determines whether to send the second message to the second node is implemented for a UE.

As an embodiment, the at least one data unit is generated at a higher layer of the first node.

As one embodiment, the higher layer is a PDCP sublayer and above.

As an embodiment, the higher layer is an RRC layer.

As an embodiment, the higher layer is a NAS layer.

As an embodiment, the high layer is a V2X layer.

As an embodiment, the higher layer is an application layer.

As an embodiment, the phrase that the at least one data unit is generated at a higher layer of the first node comprises: the at least one data unit is not received from the second node.

As an embodiment, the at least one data unit is generated at the sender of the first message.

As one embodiment, the phrase the at least one data unit generating at the sender of the first message comprises: the at least one data unit is generated by the higher layer of the sender of the first message.

As one embodiment, the phrase the at least one data unit generating at the sender of the first message comprises: the first node receives the at least one data unit from the second node.

As one embodiment, after the second node determines that no data unit is transmitted for the third node, the second node sends the first message to indicate to the first node; and after the first node transmits the cached data unit which needs to be forwarded to the third node and/or the data unit generated by the node, the first node transmits the second message to instruct to stop the first timer.

As an embodiment, the first message indicates that the second node allows the first timer to be released; after the first node completes the transmission of the sidelink for the third node, the first node allows the first timer to be released; when both the first node and the second node allow the first timer to be released, the first node sends the second message to release the first timer.

As an embodiment, in the method, the base station indicates that the relay node does not have downlink data to be forwarded to a remote node through the relay node, and after the relay node completes the transmission of the secondary link to the remote node, the relay node sends an indication to enable the remote node to stop the timer related to the DRX, so as to achieve the beneficial effect of saving power.

As an embodiment, a third receiver receives at least one data unit and a second message; stopping the first timer in response to receiving the second message; wherein the at least one data unit has a reception time earlier than the reception time of the second message.

Example 7

Embodiment 7 illustrates a schematic diagram of the relationship of a first node, a second node, and a third node according to one embodiment of the present application, as shown in fig. 7.

As one embodiment, the first node is a relay node of a group of nodes, the group of nodes including the third node, the group of nodes including M nodes, the M being a positive integer not less than 1.

As an embodiment, in the downlink direction, the first node receives a set of data units issued by the second node, and the set of data units are forwarded to one node in the group of nodes respectively; in the uplink direction, the first node receives a set of data units uploaded by the group of nodes, and the set of data units is forwarded to the second node.

As an embodiment, the first timer is maintained at the third node; the second timer is maintained at the first node; when the first timer is in an operating state, the third node performs monitoring for the sidelink; the first node performs monitoring for downlink when the second timer is in an operational state.

As an embodiment, the running state of the first timer and the running state of the second timer are independent from each other.

As a sub-embodiment of the above embodiment, the second timer is in an operating state, and the first timer is in a stopped state.

As a sub-embodiment of the above embodiment, the second timer is in an operating state, and the first timer is in an operating state.

As a sub-embodiment of the above embodiment, the second timer is in a stopped state, and the first timer is in a stopped state.

As a sub-embodiment of the above embodiment, the second timer is in a stopped state, and the first timer is in an operating state.

Example 8

Embodiment 8 illustrates a wireless protocol architecture diagram of relay transmission according to one embodiment of the present application, as shown in fig. 8.

In fig. 8, in relay transmission, data is sent from the third node to the second node through the first node (data is sent from the second node to the third node through the first node is similarly available): the first target data is sequentially processed by the PDCP sublayer 805 and the RLC sublayer 803 on the third node side to generate a first target MAC PDU at the MAC sublayer 802, and then transferred to the PHY layer 801, and then transferred to the PHY layer 811 of the first node through the air interface, and then sequentially processed by the MAC sublayer 812 and the RLC sublayer 813 to recover the first RLC data; the first RLC data is processed by the ADAPT sublayer 824, and then regenerated into second RLC data in the RLC sublayer 823, and then processed by the MAC sublayer 822 to generate a second target MAC PDU, which is then transferred to the PHY layer 821; and then transmitted to the PHY layer 831 of the second node through the air interface, and recovered through the MAC sublayer 832 to obtain a second target MAC PDU, and then sequentially processed through the RLC sublayer 833, the adaptive sublayer 834 and the PDCP sublayer 835 to obtain first target data.

As an embodiment, the ADAPT sublayer implements Routing (Routing) functionality.

As an embodiment, the routing function forwards data units received from a plurality of nodes including the third node to the second node and forwards data units received from the second node to the plurality of nodes including the third node.

As an embodiment, the ADAPT sublayer implements a Bearer mapping (Bearer mapping) function.

As an embodiment, the Bearer mapping function maps RLC bearers (beaters) of a plurality of PC5 interfaces to RLC bearers of one Uu interface.

As an embodiment, the bearer mapping function maps RLC channels (channels) of a plurality of PC5 interfaces to RLC channels of one Uu interface.

As a sub-embodiment of the above two embodiments, the plurality of PC5 interfaces corresponds to a plurality of nodes including the third node.

As an embodiment, the first node uploads to the second node one RLC channel mapping uplink data units received from the plurality of nodes to the Uu interface.

As an embodiment, mapping RLC bearers of multiple PC5 interfaces to one RLC bearer of the Uu interface may reduce LCID space of the Uu interface.

As an embodiment, for the scenario that the base station sends to the plurality of remote nodes through the relay node, the at least part of bits carrying the first identifier may enable the base station to notify the relay node that there is no subsequent downlink data sent for one of the remote nodes, and if the relay node does not send subsequent sidelink data for the remote node, the remote node may be instructed to stop the first timer, so that the remote node obtains the beneficial effect of saving power, and meanwhile, communication of other remote nodes on the sidelink is not affected.

As shown in fig. 8, the data unit forwarded through the first node is processed through the ADAPT sublayer, RLC sublayer, MAC sublayer and PHY layer, but not through the PDCP sublayer and above of the first node.

As an embodiment, the data unit generated at the first node is generated at a PDCP sublayer and above of the first node.

Example 9

Embodiment 9 illustrates a first message diagram according to one embodiment of the present application, as shown in fig. 9.

As an embodiment, the first message is a MAC CE, and the first message and a MAC subheader form a MAC subPDU.

As an embodiment, the MAC subheader includes one byte; the upper 2 bits of the one byte are reserved bits R, and the lower 6 bits of the one byte are LCID of the first message.

As an embodiment, when the MAC CE includes 8 bits, the MAC CE includes the lower 8 bits of the first identification.

As an embodiment, when the MAC CE includes 16 bits, the MAC CE includes the lower 16 bits of the first identification.

As an embodiment, when the MAC CE includes 8 bits, the MAC CE includes the upper 8 bits of the first identification.

As an embodiment, when the MAC CE includes 16 bits, the MAC CE includes the high 16 bits of the first identification.

Example 10

Embodiment 10 illustrates a block diagram of a processing device in a first node according to one embodiment of the present application, as shown in fig. 10. In fig. 10, a first node processing apparatus 1000 includes a first receiver 1001 and a first transmitter 1002. The first receiver 1001 includes at least one of a transmitter/receiver 454 (including an antenna 452), a receive processor 456, a multi-antenna receive processor 458, or a controller/processor 459 of fig. 4 of the present application; the first transmitter 1002 includes at least one of a transmitter/receiver 454 (including an antenna 452), a transmit processor 468, a multi-antenna transmit processor 457, or a controller/processor 459 of fig. 4 of the present application.

In embodiment 10, the first receiver 1001 receives a first message over the downlink, the first message being used to trigger a second message; a first transmitter 1002 that transmits the second message via a sidelink, the second message being used to instruct the first timer to be stopped; wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE.

As an embodiment, the first transmitter 1002 sends a third message via an uplink, and the third message is used to trigger the first message.

As an embodiment, the first transmitter 1002, after receiving the first message, sends at least one data unit over the sidelink; wherein the phrase that the first message is used to trigger a second message includes: the sending of the second message is triggered after receiving the first message and after completing the transmission of the at least one data unit.

As an embodiment, the first transmitter 1002, after receiving the first message, sends at least one data unit over the sidelink; wherein the phrase that the first message is used to trigger a second message includes: after receiving the first message and after completing the transmission of the at least one data unit, the sending of the second message is triggered; the at least one data unit is generated at a higher layer of the first node or at a sender of the first message.

As an embodiment, the first message comprises at least part of bits of a first identification, the first identification being used to identify the recipient of the second message; the receiver of the second message performs monitoring for the sidelink at the active time.

As an embodiment, the first message is not used to instruct to stop a second timer, which is maintained at the first node.

Example 11

Embodiment 11 illustrates a block diagram of the processing means in the second node according to an embodiment of the present application, as shown in fig. 11. In fig. 11, the second node processing means 1100 comprises a second receiver 1101 and a second transmitter 1102. The second receiver 1101 includes at least one of a transmitter/receiver 454 (including an antenna 452), a receive processor 456, a multi-antenna receive processor 458, or a controller/processor 459 of fig. 4 of the present application; the second transmitter 1102 includes at least one of a transmitter/receiver 454 (including an antenna 452), a transmit processor 468, a multi-antenna transmit processor 457, or a controller/processor 459 of fig. 4 of the present application.

In embodiment 11, the second transmitter 1102 transmits a first message over the downlink, the first message being used to trigger a second message; wherein the second message is sent over a sidelink, the second message being used to instruct stopping the first timer; the time of the first timer in the running state belongs to the active time, and the second message is a MAC CE.

As an embodiment, the second receiver 1101 receives a third message over the uplink, which third message is used to trigger the first message.

As an embodiment, after sending the first message, at least one data unit is sent over the sidelink; wherein the phrase that the first message is used to trigger a second message includes: the transmission of the second message is triggered after the transmission of the first message and after the transmission of the at least one data unit is completed.

As an embodiment, after sending the first message, at least one data unit is sent over the sidelink; wherein the phrase that the first message is used to trigger a second message includes: after sending the first message and after the transmission of the at least one data unit is completed, the sending of the second message is triggered; the at least one data unit is generated at a higher layer of the first node or at a sender of the first message.

As an embodiment, the first message comprises at least part of the bits of a first identification, which is used to identify the recipient of the second message; the receiver of the second message performs monitoring for the sidelink at the active time.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described methods may be implemented by a program that instructs associated hardware, and the program may be stored on 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 using one or more integrated circuits. Accordingly, each module unit in the above embodiment may be implemented in a hardware form or may be implemented in a software functional module form, and the application is not limited to any specific combination of software and hardware. The first type of communication node or UE or terminal in the present application includes, but is not limited to, a mobile phone, a tablet computer, a notebook, an internet card, a low power device, an eMTC (enhanced Machine Type Communication ) device, an NB-IoT device, a vehicle-mounted communication device, an aircraft, an airplane, an unmanned plane, a remote control plane, and other wireless communication devices. The second type of communication node or base station or network side device in the present application includes, but is not limited to, wireless communication devices such as macro cellular base stations, micro cellular base stations, home base stations, relay base stations, enbs, gnbs, transmission receiving nodes TRP (Transmission and Reception Point, transmission and reception points), relay satellites, satellite base stations, air base stations, and the like.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the scope of the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application.

Claims

A first node for wireless communication, comprising:

a first receiver for receiving a first message via a downlink, the first message being used to trigger a second message;

a first transmitter for transmitting the second message over a sidelink, the second message being used to instruct stopping of the first timer;

wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE.
The first node of claim 1, comprising:

the first transmitter transmits a third message over an uplink, the third message being used to trigger the first message.
The first node of claim 1, comprising:

the first transmitter, after receiving the first message, transmitting at least one data unit over the sidelink;

Wherein the phrase that the first message is used to trigger a second message includes: the sending of the second message is triggered after receiving the first message and after completing the transmission of the at least one data unit.
A first node according to claim 3, characterized in that the at least one data unit is generated at a higher layer of the first node or at the sender of the first message.
The first node according to any of claims 1-4, characterized in that the first message comprises at least part of the bits of a first identification, which is used to identify the recipient of the second message.
The first node of claim 5, wherein the receiver of the second message performs monitoring for the sidelink at the active time.
The first node of any of claims 1-6, wherein the first message is not used to instruct a second timer to be stopped, the second timer being maintained at the first node.
A second node for wireless communication, comprising:

a second transmitter for transmitting a first message via a downlink, the first message being used to trigger a second message;

Wherein the second message is sent over a sidelink, the second message being used to instruct stopping the first timer; the time of the first timer in the running state belongs to the active time, and the second message is a MAC CE.
The second node of claim 8, comprising:

and a second receiver for receiving a third message via an uplink, the third message being used to trigger the first message.
The second node of claim 8, wherein at least one data unit is transmitted over the sidelink after transmitting the first message; wherein the phrase that the first message is used to trigger a second message includes: the transmission of the second message is triggered after the transmission of the first message and after the transmission of the at least one data unit is completed.
The second node according to claim 10, characterized in that the at least one data unit is generated at a higher layer of the recipient of the first message or at the second node.
The second node according to any of claims 8 to 11, wherein the first message comprises at least part of the bits of a first identification, the first identification being used to identify a recipient of the second message.
The second node of claim 12, wherein the receiver of the second message performs monitoring for the sidelink at the active time.
The second node according to any of claims 8 to 13, wherein the first message is not used to instruct to stop a second timer maintained at the recipient of the first message.
A method in a first node for wireless communication, comprising:

receiving a first message over a downlink, the first message being used to trigger a second message;

transmitting the second message over a sidelink, the second message being used to instruct stopping the first timer;

wherein the time of the first timer in the running state belongs to active time, and the second message is a MAC CE.
The method in the first node of claim 15, comprising:

a third message is sent over the uplink, the third message being used to trigger the first message.
The method in the first node of claim 15, comprising:

transmitting at least one data unit over the sidelink after receiving the first message;

Wherein the phrase that the first message is used to trigger a second message includes: the sending of the second message is triggered after receiving the first message and after completing the transmission of the at least one data unit.
The method in the first node of claim 17, wherein the at least one data unit is generated at a higher layer of the first node or at a sender of the first message.
A method in a first node according to any of claims 15-18, characterized in that the first message comprises at least part of the bits of a first identification, which first identification is used to identify the recipient of the second message.
The method in the first node of claim 19, wherein the receiver of the second message performs monitoring for the sidelink at the active time.
A method in a first node according to any of claims 15 to 20, wherein the first message is not used to indicate to stop a second timer maintained at the first node.
A method in a second node for wireless communication, comprising:

Transmitting a first message over a downlink, the first message being used to trigger a second message;

wherein the second message is sent over a sidelink, the second message being used to instruct stopping the first timer; the time of the first timer in the running state belongs to the active time, and the second message is a MAC CE.
A method in a second node according to claim 22, comprising:

a third message is received over the uplink, the third message being used to trigger the first message.
The method in the second node according to claim 22, characterized in that after sending the first message at least one data unit is sent over the sidelink; wherein the phrase that the first message is used to trigger a second message includes: the transmission of the second message is triggered after the transmission of the first message and after the transmission of the at least one data unit is completed.
The method in the second node according to claim 24, wherein the at least one data unit is generated at a higher layer of the recipient of the first message or at the second node.
A method in a second node according to any of claims 22-25, characterized in that the first message comprises at least part of the bits of a first identification, which first identification is used to identify the recipient of the second message.
The method in the second node of claim 26, wherein the receiver of the second message performs monitoring for the sidelink at the active time.
A method in a second node according to any of claims 22-27, wherein the first message is not used to indicate to stop a second timer, which is maintained at the receiver of the first message.