WO2024078431A1

WO2024078431A1 - Method and device used for wireless communication

Info

Publication number: WO2024078431A1
Application number: PCT/CN2023/123478
Authority: WO
Inventors: 陈宇; 张晓博
Original assignee: 上海朗帛通信技术有限公司
Priority date: 2022-10-13
Filing date: 2023-10-09
Publication date: 2024-04-18
Also published as: CN117939490A

Abstract

Disclosed in the present application are a method and device used for wireless communication. The method comprises: receiving first signaling, which is used for configuring a SpCell; and in response to receiving the first signaling, executing a target operation set, wherein whether the target operation set comprises a first operation set is related to whether a first node is represented as a first-type UE, and the meaning of whether the target operation set comprises a first operation set being related to whether a first node is represented as a first-type UE is: when a first node is represented as a first-type UE, the target operation set does not comprise the first operation set, and when the first node is not represented as a first-type UE, the target operation set comprises a first operation set. By means of the present application, the reliability of communication is improved by means of the first signaling, and communication interruption is avoided.

Description

A method and device for wireless communication

Technical Field

The present application relates to a transmission method and apparatus in a wireless communication system, and in particular to side link communication, relay communication, and multipath relay.

Background technique

In the future, the application scenarios of wireless communication systems will become more and more diversified, and different application scenarios will put forward different performance requirements for the system. In order to meet the different performance requirements of various application scenarios, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 plenary meeting decided to study the new air interface technology (NR, New Radio) (or Fifth Generation, 5G), and the NR WI (Work Item) was passed at the 3GPP RAN #75 plenary meeting, starting the standardization work on NR.

In communication, both LTE (Long Term Evolution) and 5G NR involve accurate reception of reliable information, optimized energy efficiency, determination of information validity, flexible resource allocation, scalable system structure, efficient non-access layer information processing, low service interruption and drop rate, and support for low power consumption. This is of great significance to the normal communication between base stations and user equipment, the reasonable scheduling of resources, and the balancing of system load. It can be said to be the cornerstone of high throughput, meeting the communication needs of various services, improving spectrum utilization, and improving service quality. It is indispensable for eMBB (ehanced Mobile BroadBand), URLLC (Ultra Reliable Low Latency Communication) and eMTC (enhanced Machine Type Communication). At the same time, there are extensive demands in IIoT (Industrial Internet of Things), V2X (Vehicular to X), device to device, unlicensed spectrum communication, user communication quality monitoring, network planning optimization, NTN (Non Territerial Network), TN (Territial Network), dual connectivity systems, wireless resource management and multi-antenna codebook selection, signaling design, neighbor management, business management, and beamforming. The information transmission methods are divided into broadcast and unicast. Both transmission methods are essential for 5G systems because they are very helpful in meeting the above requirements. The UE can be connected to the network directly or through a relay.

As the scenarios and complexity of the system continue to increase, higher requirements are placed on reducing interruption rates, reducing latency, enhancing reliability, enhancing system stability, business flexibility, and power saving. At the same time, compatibility between different versions of different systems also needs to be considered during system design.

The meanings of the concepts, terms and abbreviations in this application may refer to the 3GPP standards, including but not limited to:

https://www.3gpp.org/ftp/Specs/archive/21_series/21.905/21905-h10.zip

https://www.3gpp.org/ftp/Specs/archive/38_series/38.300/38300-h10.zip

https://www.3gpp.org/ftp/Specs/archive/38_series/38.331/38331-h10.zip

https://www.3gpp.org/ftp/Specs/archive/38_series/38.321/38321-h10.zip

https://www.3gpp.org/ftp/Specs/archive/38_series/38.304/38304-h10.zip

https://www.3gpp.org/ftp/Specs/archive/23_series/23.287/23287-h10.zip

https://www.3gpp.org/ftp/Specs/archive/23_series/23.304/23304-h10.zip

Summary of the invention

In many communication scenarios, the use of relays is involved. For example, when a UE (User Equipment) is at the edge of a cell and has poor coverage, it can access the network through a relay, and the relay node can be another UE. The relay methods mainly include layer 3 relay and layer 2 relay (L2 U2N relay), both of which provide network access services for remote nodes (U2N remote UE) through relay nodes. Layer 3 relay is transparent to the access network, that is, the remote UE only establishes a connection with the core network, and the access network cannot identify whether the data comes from the remote node or the relay node; while in layer 2 relay, the remote node (U2N remote UE) and the access network (RAN) have an RRC connection, the access network can manage the remote node, and a radio bearer can be established between the access network and the remote node. The relay can be another UE. In a system that supports layer 2 relay, the UE can communicate with the network through the L2 relay UE (L2 U2N relay UE), that is, using an indirect path, or it can communicate with the network directly without a relay, that is, using a direct path. In some scenarios, a UE can use both direct and indirect paths to achieve better reliability and higher throughput. The differences are very large, and the communication protocol layers involved are also different, which makes configuration and management difficult. At the same time, a network may have UEs that only use direct paths, such as traditional UEs, and UEs that only use indirect paths. There may also be UEs that use both direct and indirect paths. In these complex situations, using a unified management and configuration method is conducive to simplifying signaling and reducing complexity. Therefore, how to support remote UEs that use both direct and indirect paths is a problem to be solved.

In view of the above-mentioned problems, this application provides a solution.

It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of any node of the present application can be applied to any other node. In the absence of conflict, the embodiments and features in the embodiments of the present application can be arbitrarily combined with each other. At the same time, the method proposed in the present application can also be used to solve other problems in communication.

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

receiving a first signaling; the first signaling is used to configure the SpCell; in response to receiving the first signaling, executing a target operation set, wherein whether the target operation set includes the first operation set is related to whether the first node behaves as a first type of UE;

Among them, the sentence whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE means that: when the first node behaves as a first-class UE, the target operation set does not include the first operation set; when the first node does not behave as a first-class UE, the target operation set includes the first operation set; whether a direct path is used to determine whether the first node behaves as a first-class UE, when only an indirect path is used, the first node behaves as a first-class UE; when both an indirect path and a direct path are used, the first node does not behave as a first-class UE; the direct path is to transmit information through an L2 U2N relay; the indirect path is not to transmit information through an L2 U2N relay; the target operation set includes at least configuring a first timer; the first operation set includes configuring a second timer and N; the start condition of the first timer includes initiating RRC connection reconstruction, and the stop condition of the first timer includes selecting a suitable NR cell or selecting a suitable L2 U2N relay UE; the start condition of the second timer includes: detecting a problem with the physical layer of the SpCell; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for the SpCell; the first-class UE uses an indirect path.

As an embodiment, the problems to be solved by the present application include: how to support UEs that use both direct paths and indirect paths; how to reduce the complexity of the protocol, how to configure a direct path, how to configure an indirect path, and how to better be compatible with different types of UEs; how to better support relay communications in different scenarios; how to configure a timer; and how to distinguish between a direct path and an indirect path.

As an embodiment, the benefits of the above method include: supporting UEs that use direct paths and indirect paths at the same time, reducing complexity, and supporting multiple application scenarios; ensuring communication reliability, ensuring communication flexibility, reducing complexity, improving user experience, and avoiding communication interruptions.

Specifically, according to one aspect of the present application, the first node is an L2 U2N remote UE.

Specifically, according to one aspect of the present application, the phrase "the first signaling is used to configure a non-direct path" includes: configuring the SRAP layer of the L2 U2N remote UE; wherein the first node does not behave as a first-class UE.

Specifically, according to one aspect of the present application, a first measurement report is sent; the first measurement report includes a measurement result of the L2U2N relay UE for the first node; wherein the first node does not behave as a first type UE.

Specifically, according to one aspect of the present application, a first notification message is received, where the sending of the first notification message is due to one of Uu RLF, synchronization reconfiguration, cell reselection, RRC connection reestablishment failure, and RRC connection continuation failure occurring in the L2 U2N relay UE of the first node;

Among them, the first node is in an RRC connected state, and whether the first notification message triggers RRC connection reconstruction is related to whether the first node uses a direct path. When the first node uses a direct path, the first notification message does not trigger RRC connection reconstruction; when the first node does not use a direct path, the first notification message triggers RRC connection reconstruction.

Specifically, according to one aspect of the present application, second signaling is received, where the second signaling is a system information block, and the second signaling is sent by broadcasting;

The first signaling includes a first candidate value of the third timer; and the second signaling includes a second candidate value of the third timer.

Specifically, according to one aspect of the present application, the start condition of the third timer includes sending an RRC connection continuation request message; the stop condition of the third timer includes receiving an RRC connection continuation message; whether the third timer uses the first candidate value or the second candidate value is related to whether the first node behaves as a first type UE.

Specifically, according to one aspect of the present application, a third signaling is received, the third signaling is used to indicate entering an RRC inactive state; as a response to receiving the third signaling, the physical cell identity is replaced with the target identity; whether the target identity is the first identity or the second identity and the It is related to whether the first node uses a direct path;

Among them, the first node is an L2 U2N remote node; the first identity is the physical cell identity of the cell that sends the third signaling; the second identity is the physical cell identity included in the discovery message of the L2 U2N relay UE of the first node; the sentence "whether the target identity is the first identity or the second identity is related to whether the first node uses a direct path" means that: when the first node uses a direct path, the target identity is the first identity; when the first node does not use a direct path, the target identity is the second identity.

Specifically, according to one aspect of the present application, the first type of UE is L2 U2N remote UE.

ntorlSpecifically, according to one aspect of the present application, the first node is an Internet of Things terminal.

Specifically, according to one aspect of the present application, the first node is a user equipment.

Specifically, according to one aspect of the present application, the first node is an access network device.

Specifically, according to one aspect of the present application, the first node is a vehicle-mounted terminal.

Specifically, according to one aspect of the present application, the first node is an aircraft.

Specifically, according to one aspect of the present application, the first node is a mobile phone.

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

a first receiver, receiving a first signaling, wherein the first signaling is used to configure a SpCell (Special Cell); in response to receiving the first signaling, executing a target operation set, wherein whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE (User Equipment);

Among them, the meaning of whether the target operation set includes the first operation set and whether the first node behaves as a first-class UE is: when the first node behaves as a first-class UE, the target operation set does not include the first operation set; when the first node does not behave as a first-class UE, the target operation set includes the first operation set; whether a direct path is used to determine whether the first node behaves as a first-class UE, when only an indirect path is used, the first node behaves as a first-class UE; when both an indirect path and a direct path are used, the first node does not behave as a first-class UE; the direct path is through L2 (Layer-2) U2N (UE to Network, UE to network) relay transmission information; the indirect path is not to transmit information through L2 U2N relay; the target operation set includes at least configuring a first timer; the first operation set includes configuring a second timer and N; the start condition of the first timer includes initiating RRC connection reconstruction, and the stop condition of the first timer includes selecting a suitable NR (New Radio) cell or selecting a suitable L2 U2N relay UE; the start condition of the second timer includes: detecting a problem with the physical layer of SpCell; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for SpCell; the first type of UE uses a non-direct path.

As an embodiment, compared with the traditional solution, this application has the following advantages:

Multiple types of communication modes are supported, including using only direct paths, using only indirect paths, and using both direct and indirect paths.

A UE may have different types and may be represented as a UE of different types according to the different paths used.

Supporting an L2 U2N remote UE may not appear as an L2 U2N remote UE.

The complexity is relatively low.

The impact on the system and the protocol is relatively low, which helps to speed up product development.

BRIEF DESCRIPTION OF THE DRAWINGS

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

FIG1 shows a flowchart of receiving a first signaling and executing a target operation set according to an embodiment of the present application;

FIG2 shows a schematic diagram of a network architecture according to an embodiment of the present application;

FIG3 is a schematic diagram showing an embodiment of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application;

FIG4 shows a schematic diagram of a first communication device and a second communication device according to an embodiment of the present application;

FIG5 shows a flow chart of wireless signal transmission according to an embodiment of the present application;

FIG6 shows a flowchart of a protocol stack according to an embodiment of the present application;

FIG7 shows a schematic diagram of a protocol stack according to an embodiment of the present application;

FIG8 shows a schematic diagram of a direct path and an indirect path according to an embodiment of the present application;

FIG9 illustrates a schematic diagram of a processing device used in a first node according to an embodiment of the present application;

FIG10 illustrates a schematic diagram of a processing device used in a first node according to an embodiment of the present application.

Implementation

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

Example 1

Embodiment 1 illustrates a flowchart of receiving a first signaling and executing a target operation set according to an embodiment of the present application, as shown in FIG1. In FIG1, each box represents a step, and it should be emphasized that the order of the boxes in the figure does not represent the temporal sequence between the steps represented.

In Embodiment 1, the first node in the present application receives a first signaling in step 101 ; and executes a target operation set in step 102 .

Among them, the first signaling is used to configure SpCell; whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE; the first signaling is used to configure an indirect path; the sentence whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE means that when the first node behaves as a first-class UE, the target operation set does not include the first operation set; when the first node does not behave as a first-class UE, the target operation set includes the first operation set; whether a direct path is used to determine whether the first node behaves as a first-class UE, when only an indirect path is used, the first node behaves as a first-class UE; when both an indirect path and a direct path are used When the connection path is connected, the first node does not behave as a first type of UE; the direct path is to transmit information through the L2 U2N relay; the indirect path is not to transmit information through the L2 U2N relay; the target operation set includes at least configuring a first timer; the first operation set includes configuring a second timer and N; the start condition of the first timer includes initiating RRC connection reconstruction, and the stop condition of the first timer includes selecting a suitable NR cell or selecting a suitable L2 U2N relay UE; the start condition of the second timer includes: detecting a problem with the physical layer of the SpCell; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for the SpCell; the first type UE uses a non-direct path.

As an embodiment, the first node is UE (User Equipment).

As an embodiment, the first node is in an RRC connected state.

As an embodiment, the first signaling triggers the execution of a target operation set.

As an embodiment, the serving cell refers to the cell where the UE resides. Performing a cell search includes the UE searching for a suitable cell of the selected PLMN (Public Land Mobile Network) or SNPN (Stand-alone Non-Public Network), selecting the suitable cell to provide available services, and monitoring the control channel of the suitable cell. This process is defined as residing on the cell; that is, a residing cell is the serving cell of the UE relative to the UE. Residing on a cell in the RRC idle state or the RRC inactive state has the following benefits: the UE can receive system messages from the PLMN or SNPN; after registration, if the UE wishes to establish an RRC connection or continue a suspended RRC connection, the UE can do so by performing initial access on the control channel of the residing cell; the network can page the UE; and the UE can receive ETWS (Earthquake and Tsunami Warning System) and CMAS (Commercial Mobile Alert System) notifications.

As an embodiment, for a UE in an RRC connected state without configuring CA/DC (carrier aggregation/dual connectivity), there is only one serving cell including a primary cell. For a UE in an RRC connected state with configured CA/DC (carrier aggregation/dual connectivity), the serving cell is used to indicate a collection of cells including a special cell (SpCell) and all cells from the cells. The primary cell (Primary Cell) is an MCG (Master Cell Group) cell, which operates on the primary frequency. The UE performs an initial connection establishment process or initiates connection reconstruction on the primary cell. For dual connection operation, the special cell refers to the PCell (Primary Cell) of the MCG or the PSCell (Primary SCG Cell) of the SCG (Secondary Cell Group); if it is not a dual connection operation, the special cell refers to the PCell.

As an embodiment, the operating frequency of SCell (Secondary Cell) is the secondary frequency.

As an example, individual contents of an information element are referred to as fields.

As an embodiment, MR-DC (Multi-Radio Dual Connectivity) refers to the dual connection of E-UTRA and NR nodes, or the dual connection between two NR nodes.

As an embodiment, in MR-DC, the wireless access node that provides the control plane connection to the core network is the master node, which may be Master eNB, master ng-eNB, or master gNB.

As an embodiment, MCG refers to a group of service cells associated with a master node in MR-DC, including SpCells, and may also, optionally, include one or more SCells.

As an embodiment, PCell is the SpCell of MCG.

As an embodiment, the PSCell is the SpCell of the SCG.

As an embodiment, in MR-DC, the control plane connection to the core network is not provided, and the radio access node that provides additional resources to the UE is a slave node. The slave node can be an en-gNB, a slave ng-eNB or a slave gNB.

As an embodiment, in MR-DC, a group of service cells associated with a slave node is a SCG (secondary cell group), including a SpCell and, optionally, one or more SCells.

As an embodiment, the access layer function that enables V2X (Vehicle-to-Everything) communication defined in 3GPP standard TS 23.285 is V2X sidelink communication, wherein the V2X sidelink communication occurs between adjacent UEs and uses E-UTRA technology but does not traverse network nodes.

As an embodiment, at least the access layer function that enables V2X (Vehicle-to-Everything) communication defined in 3GPP standard TS 23.287 is NR sidelink communication, wherein the NR sidelink communication occurs between two or more adjacent UEs and uses NR technology but does not traverse (traversing) network nodes.

As an embodiment, the sidelink (SL) is a direct communication link between UE-to-UE using a sidelink resource allocation mode, a physical layer signal or channel, and a physical layer process.

As an embodiment, in the present application, signaling names or domain names or message names starting with "SL-" are all for secondary links.

As an example, not or not in or not in coverage is equivalent to out of coverage.

As an embodiment, within coverage is equal to within coverage.

As an example, outside coverage is equal to outside coverage.

As an embodiment, the relay in the present application refers to a U2U relay UE.

As an embodiment, the direct path refers to a transmission path from UE to network, and transmission through the direct path means that data is sent between a remote UE and the network of UE to network (U2N) without passing through a relay.

As a sub-embodiment of this embodiment, the data includes higher-layer data and signaling.

As a sub-embodiment of this embodiment, the data includes RRC signaling.

As a sub-embodiment of this embodiment, the data includes a bit string or a bit block.

As a sub-embodiment of this embodiment, the data only includes signaling or data carried by RB (radio bearer).

As an embodiment, the indirect path refers to a transmission path from UE to network, and transmission through the indirect path means that data is forwarded between a remote UE from UE to network (U2N, UE-to-Network) and the network through a relay UE from UE to network (U2N, UE-to-Network).

As a sub-embodiment of this embodiment, the data includes RRC signaling.

As an embodiment, a wireless link is either the direct path or the indirect path.

As an embodiment, the U2N relay UE refers to a UE that provides a function of supporting a connection between a U2N remote UE and a network.

As an embodiment, the U2N remote UE refers to a UE that needs to communicate with the network through a U2N relay UE.

As an embodiment, the U2N remote UE refers to a UE that supports relay services and communicates with the network.

As an embodiment, the U2N relay is a U2N relay UE.

As an embodiment, when sending and receiving unicast services with the network, both the U2N relay and the U2N remote node are in the RRC connected state.

As an embodiment, not transmitting through a direct path is equal to transmitting through an indirect path.

As an embodiment, not transmitting through a direct path includes transmitting through a relay.

As an embodiment, transmission through a direct path is or includes transmission without passing through a relay.

As an embodiment, transmitting via a direct path is or includes forwarding without passing through a relay.

As an embodiment, the U2N relay UE is a UE that provides a functionality of supporting connectivity to a network for a U2N remote UE.

As a sub-embodiment of this embodiment, the U2N relay UE is a UE.

As a sub-embodiment of this embodiment, the U2N relay UE provides a relay service to the network for the U2N remote UE.

As an embodiment, the U2N remote UE is a UE that communicates with the network through the U2N relay UE.

As an embodiment, a direct mode is a mode using the direct path.

As an embodiment, the direct connection mode is a mode in which the U2N remote UE communicates with the network using the direct path.

As an embodiment, the direct connection mode is a mode in which the U2N remote UE uses the direct path to transmit RRC signaling or establish an RRC connection with the network.

As an embodiment, an indirect mode is a mode using the indirect path.

As an embodiment, the non-direct connection mode is a mode using the non-direct path.

As an embodiment, the direct connection mode is a mode in which the U2N remote UE communicates with the network using the indirect path.

As an embodiment, the direct connection mode is a mode in which the U2N remote UE uses the non-direct path to transmit RRC signaling or establish an RRC connection with the network.

As an embodiment, the PDCP entity corresponding to the radio bearer terminated between the UE and the network is located in the UE and the network respectively.

As an embodiment, the direct path is a communication link, channel or bearer used for transmission via the direct path.

As an embodiment, the phrase using a direct path means that the data carried by at least one SRB (Signaling radio bearer) between the UE and the network does not pass through the relay or forwarding of other nodes.

As an embodiment, the phrase using a direct path means that the data carried by at least one RB (radio bearer) between the UE and the network does not pass through the relay or forwarding of other nodes.

As an embodiment, the phrase using a direct path refers to that an RLC bearer associated with at least one SRB (Signaling radio bearer) between the UE and the network terminates at the UE and the network respectively.

As an embodiment, the phrase using a direct path refers to that an RLC entity associated with at least one SRB (Signaling radio bearer) between the UE and the network terminates at the UE and the network, respectively.

As an embodiment, the phrase using a direct path means that the data carried by at least one DRB (Data radio bearer) between the UE and the network does not pass through the relay or forwarding of other nodes.

As an embodiment, the phrase using a direct path refers to that an RLC bearer associated with at least one DRB (Data radio bearer) between the UE and the network terminates at the UE and the network, respectively.

As an embodiment, the phrase using a direct path refers to that an RLC entity associated with at least one DRB (Data radio bearer) between the UE and the network terminates at the UE and the network, respectively.

As an embodiment, the phrase using a direct path refers to the existence of a direct communication link between the UE and the network.

As an embodiment, the phrase using a direct path refers to the presence of a Uu interface between the UE and the network.

As an embodiment, the phrase using a direct path means that there is a MAC layer of a Uu interface between the UE and the network, and the MAC layer of the Uu interface carries RRC signaling.

As an embodiment, the phrase uses a direct path to refer to the physical layer of the Uu interface existing between the UE and the network.

As an embodiment, the phrase using a direct path refers to the existence of a logical channel and/or a transport channel between the UE and the network.

As an embodiment, the indirect path is an indirect path or a communication link or a channel or a bearer used when transmitting through the indirect path.

As an embodiment, the phrase using non-direct path transmission refers to that the data carried by at least one RB (radio bearer) between the UE and the network is relayed or forwarded through other nodes.

As an embodiment, the phrase using a non-direct path refers to that data carried by at least one SRB (Signaling radio bearer) between the UE and the network is relayed or forwarded through other nodes.

As an embodiment, the phrase using non-direct path transmission means that the RLC bearer associated with at least one SRB (Signaling radio bearer) between the UE and the network terminates at the UE and other nodes, and other nodes and the network respectively.

As an embodiment, the phrase using a non-direct path means that an RLC entity associated with at least one SRB (Signaling radio bearer) between the UE and the network terminates at the UE and other nodes, and the other nodes and the network respectively.

As an embodiment, the phrase using a non-direct path refers to that data carried by at least one DRB (data radio bearer) between the UE and the network is relayed or forwarded through other nodes.

As an embodiment, the phrase using a non-direct path refers to that an RLC bearer associated with at least one DRB (data radio bearer) between the UE and the network terminates at the UE and other nodes, and other nodes and the network, respectively.

As an embodiment, the phrase using a non-direct path refers to that an RLC entity associated with at least one DRB (data radio bearer) between the UE and the network terminates at the UE and other nodes, and other nodes and the network, respectively.

As an embodiment, the other node is other UE.

As an embodiment, the other node is an L2 U2N relay UE.

As an embodiment, the phrase at least one SRB means at least one of {SRB0, SRB1, SRB2, SRB3}.

As an embodiment, the phrase at least one RB means SRB and DRB (data radio bearer).

As an embodiment, the network includes a radio access network (RAN) and/or a serving cell and/or a base station.

As an embodiment, when a direct path is used, the UE may send physical layer signaling to the network; when an indirect path transmission is used, the UE may not send or directly send physical layer signaling to the network;

As an embodiment, when using a direct path, the UE can send a MAC CE to the network; when using an indirect path transmission, the UE cannot send or directly send a MAC CE to the network;

As an embodiment, when a direct path is used, there are no other protocol layers between the PDCP layer and the RLC layer of the first node; when an indirect path transmission is used, there are other protocol layers between the PDCP layer and the RLC layer of the first node.

As a sub-embodiment of this embodiment, the other protocol layer is or includes a side link adaptation layer.

As an embodiment, when a direct path is used, the network directly schedules the uplink transmission of the first node through DCI; when an indirect path transmission is used, the network does not directly schedule the uplink transmission of the first node through DCI.

As an embodiment, when a direct path is used, the SRB of the first node is associated with the RLC entity and/or RLC layer and/or RLC bearer; when an indirect path transmission is used, the SRB of the first node is associated with the RLC entity of the PC5 interface.

As an embodiment, when a direct path is used, a mapping relationship exists between the SRB of the first node and the RLC entity of the Uu interface; when an indirect path transmission is used, a mapping relationship exists between the SRB of the first node and the RLC entity of the PC5 interface.

As an example, the phrase using a direct path includes receiving using a direct path and/or sending using a direct path.

As an example, the phrase using an indirect path includes receiving using an indirect path and/or sending using an indirect path.

As an embodiment, there exists a direct path and/or an indirect path between the first node and the network.

As an embodiment, the first node supports conversion of an indirect path to an indirect path.

As an embodiment, the relay in the present application refers to a U2N relay UE.

As an embodiment, the relay in this application refers to L2 U2N relay UE.

As an embodiment, the first node in the present application does not use DC (dual connectivity).

As an embodiment, the first node in the present application is not configured with DC (dual connectivity).

As an embodiment, the first node in the present application has only one cell group.

As an embodiment, the first node in the present application has only one cell group, namely, a master cell group (MCG).

As an embodiment, the first node in the present application is not configured with a secondary cell group (SCG).

As an embodiment, the first node in the present application is configured with a secondary cell group (SCG).

As an embodiment, the relay in this application refers to L2 U2N relay UE.

As an embodiment, the first node in the present application uses both a direct path and an indirect path.

As an embodiment, the L2 U2N relay UE of the first node has the same PCell as the first node.

As an embodiment, the L2 U2N relay UE of the first node has a different PCell from the first node.

As an embodiment, the first node at least uses an indirect path.

As an embodiment, the SpCell is or includes a PCell.

As an embodiment, the SpCell is or includes a PSCell.

As an embodiment, the first signaling is RRC signaling.

As an embodiment, the first signaling is downlink signaling.

As an embodiment, the first signaling includes one or more RRC messages.

As an embodiment, the first signaling includes an RRCReconfiguration message.

As an embodiment, the first signaling includes at least a partial field of the RRCReconfiguration message.

As an embodiment, the first signaling includes the spCellConfig field carried by RRCReconfiguration.

As an embodiment, the first signaling is or includes spCellConfig.

As an embodiment, the first signaling is or includes cellGroupConfig.

As an embodiment, the first signaling includes an element for configuring a direct path or an indirect path.

As an embodiment, the first signaling carries a domain whose name includes path.

As an embodiment, the reception of the first signaling is executed.

As an embodiment, the sentence "executes the target operation set as a response to receiving the first signaling" includes: the execution of the first signaling includes executing the target operation set.

As an embodiment, the phrase "the first signaling" is used to configure SpCell including configuring rlf-related timers.

As an embodiment, the phrase said first signaling is used to configure SpCell including configuring rlf related constants.

As an embodiment, the phrase said first signaling is used to configure the SpCell including configuring the bandwidth part (BWP, bandwidth part).

As an embodiment, the phrase said first signaling is used to configure SpCell including configuring low mobility assessment.

As an embodiment, the phrase "the first signaling" is used to configure SpCell including the configured serving cell radio link monitoring and evaluation.

As an embodiment, the phrase said first signaling is used to configure SpCell including a configured serving cell beam failure detection evaluation.

As an embodiment, the phrase "the first signaling" is used to configure PDCCH (physical downlink control channel).

As an embodiment, the phrase "the first signaling" is used to configure PDSCH (physical downlink shared channel).

As an embodiment, the phrase said first signaling is used to configure a link loss reference link.

As an embodiment, the phrase "the first signaling" is used to configure a serving cell measurement object.

As an embodiment, the phrase "the first signaling" is used to configure reference signal resources.

As an embodiment, the phrase said first signaling is used to configure HARQ (Hybrid Automatic Repeat reQuest).

As an embodiment, the phrase said first signaling is used to configure a beam.

As an embodiment, the phrase "the first signaling" is used to configure multiple antennas.

As an embodiment, the phrase “execute a target operation set” includes: executing each operation in the target operation set.

As an embodiment, the phrase “the target operation set includes a first operation set” means that executing the target operation set includes executing the first operation set.

As an embodiment, the phrase that the target operation set includes a first operation set includes: executing the target operation set includes executing each operation in the first operation set.

As an embodiment, the target operation set includes at least one operation.

As an embodiment, the first operation set includes at least one operation.

As an embodiment, the phrase "the target operation set does not include the first operation set" means that when the target operation set is executed, no operation in the first operation set is executed.

As an embodiment, the phrase that the target operation set does not include the first operation set includes: no operation in the first operation set is executed when the first signaling is executed.

As an embodiment, the phrase that the target operation set does not include the first operation set means that when executing the first signaling, only operations other than the first operation set in the target operation set are executed.

As an embodiment, the sentence that the first signaling is used to configure an indirect path includes: the first signaling configures the RLC associated with the indirect path.

As an embodiment, the sentence that the first signaling is used to configure an indirect path includes: the first signaling configures resources used by the indirect path.

As an embodiment, the sentence that the first signaling is used to configure an indirect path includes: the first signaling configures measurements associated with the indirect path.

As an embodiment, the sentence that the first signaling is used to configure an indirect path includes: the first signaling configures the SRAP layer associated with the indirect path.

As an embodiment, the sentence that the first signaling is used to configure a non-direct path includes: the first signaling configures the relay UE associated with the non-direct path.

As an embodiment, the sentence that the first signaling is used to configure an indirect path includes: the first signaling configures the RB associated with the indirect path.

As an embodiment, the sentence that the first signaling is used to configure a non-direct path includes: configuring a T420 timer.

As an embodiment, the sentence that the first signaling is used to configure a non-direct path includes: configuring an RLC channel.

As a sub-embodiment of this embodiment, the RLC channel is an RLC channel of the PC5 interface.

As an embodiment, the meaning of the sentence that the first signaling is used to configure a non-direct path includes: the first signaling includes sl-RemoteUE-ConfigCommon.

As an embodiment, the sentence that the first signaling is used to configure a non-direct path includes: the first signaling includes SL-RemoteUE-Config.

As an embodiment, the sentence that the first signaling is used to configure a non-direct path includes: the first signaling includes SL-RLC-ChannelConfig.

As an embodiment, the sentence that the first signaling is used to configure a non-direct path includes: the first signaling includes SL-SRAP-Config.

As an embodiment, the sentence that the first signaling is used to configure a non-direct path includes: the first signaling includes SL-RLC-ChannelConfigPC5.

As an embodiment, the sentence that the first signaling is used to configure a non-direct path includes: the first signaling includes sl-PHY-MAC-RLC-Config.

As an embodiment, the first type of UE is L2 U2N remote UE.

As an embodiment, the first type of UE is a L2 U2N remote UE that only uses a non-direct path.

As an embodiment, the phrase that the first type of UE uses a non-direct path includes: the first type of UE at least uses a non-direct path.

As an embodiment, the phrase that the first type of UE uses an indirect path includes: the first type of UE uses both an indirect path and a direct path.

As an embodiment, the phrase acting as a first category UE includes: complying with the behavior of the first category UE.

As an embodiment, the phrase "first type of UE" means that: when executing the first signaling, the first signaling is executed according to the operation required to be performed by the first type of UE.

As an embodiment, the phrase expressed as a first type of UE includes: executing a target operation set when executing a first signaling.

As an embodiment, the phrase representing the first type of UE includes: using an indirect path.

As an embodiment, the phrase representing the first type of UE means that only indirect paths are used.

As an embodiment, the phrase expressed as the first type of UE means including: being an L2 U2N remote UE.

As an embodiment, the phrase representing the first type of UE includes: performing signaling for configuring a non-direct path.

As an embodiment, the phrase manifests itself as a first type of UE, including: executing signaling for configuring L2 U2N remote UE.

As an embodiment, the phrase expressed as the first type of UE means including: considering itself as a L2 U2N remote UE.

As an embodiment, the phrase that the first node behaves as a first type of UE includes: the first node behaves as an L2 U2N remote UE.

As an embodiment, the phrase that the first node behaves as a first type of UE includes: the first node behaves as an L2 U2N remote UE and only uses an indirect path.

As an embodiment, the phrase that the first node behaves as a first type of UE includes: the first node behaves as an L2 U2N remote UE and is only configured with an indirect path.

As an embodiment, the phrase "the first node is a first type of UE" includes: the first node is a L2 U2N remote UE and the direct path is not used.

As an embodiment, the phrase that the first node behaves as a first type of UE includes: the first node behaves as an L2 U2N remote UE and is not configured with a direct path.

As an embodiment, the phrase that the first node behaves as a first type of UE includes: the first node behaves as a L2 U2N remote UE that only uses a non-direct path.

As an embodiment, the phrase that the first node behaves as a first type of UE includes: the first node behaves as an L2 U2N remote UE that is only configured with a non-direct path.

As an embodiment, the first node behaves as a first type of UE, which means or includes: the first node behaves as an L2 U2N remote UE.

As an embodiment, the phrase that the first node behaves as an L2 U2N remote UE means or includes: the first node only uses an indirect path.

As an embodiment, the phrase that the first node behaves as an L2 U2N remote UE means or includes: the first node is only configured with an indirect path.

As an embodiment, the phrase that the first node behaves as an L2 U2N remote UE means or includes: the first node does not use a direct path.

As an embodiment, the phrase that the first node behaves as an L2 U2N remote UE means or includes: the first node is not configured with a direct path.

As an example, the phrase using only indirect paths means that no direct paths are used.

As an example, the phrase using only non-direct paths means that no direct paths are configured.

As an example, the phrase using only indirect paths means that direct paths are not supported or cannot be used.

As an embodiment, the phrase using both an indirect path and a direct path includes: being configured with both an indirect path and a direct path.

As an example, the phrase using both an indirect path and a direct path includes: both an indirect path and a direct path can be used.

As an embodiment, the phrase using both an indirect path and a direct path means that during the communication process, both an indirect path and a direct path may be used.

As an embodiment, the phrase using both an indirect path and a direct path means that in one communication, both an indirect path and a direct path can be used.

As an embodiment, the phrase using both an indirect path and a direct path means that at least one RB uses or is associated with the indirect path, and at least one RB uses or is associated with the direct path.

As an example, the phrase using both an indirect path and a direct path includes: transmitting data using both the direct path and the indirect path at the same time.

As an example, the phrase using both the indirect path and the direct path includes: using both the direct path and the indirect path to transmit the same data at the same time.

As an example, the phrase "transmitting information" includes transmitting signaling and/or data.

As an embodiment, the first timer is different from the second timer.

As an embodiment, N is a positive integer.

As an embodiment, configuration N means the value of configuration N.

As an embodiment, the first signaling is sent to the first node via a dedicated channel.

As an embodiment, the phrase "the starting condition of the first timer includes initiating RRC connection reconstruction" means that: when RRC connection reconstruction is initiated, the first timer is started.

As an embodiment, the phrase "the starting condition of the first timer includes initiating RRC connection reconstruction" means that initiating RRC connection reconstruction includes starting or starting the first timer.

As an embodiment, the first node can communicate normally with the network only when having an RRC connection.

As an embodiment, a radio link failure triggers the initiation of RRC connection reestablishment.

As an embodiment, initiating RRC connection reestablishment includes sending an RRC connection reestablishment request message.

As an embodiment, initiating RRC connection reestablishment includes selecting a suitable cell to send an RRC connection reestablishment request message.

As an embodiment, initiating RRC connection reestablishment includes selecting a suitable L2 U2N relay UE to send an RRC connection reestablishment request message.

As an embodiment, initiating RRC connection reestablishment includes suspending at least one RB.

As an embodiment, initiating RRC connection reestablishment includes MAC reset.

As an embodiment, the method proposed in the present application is suitable for NR networks.

As an embodiment, the method proposed in this application is suitable for networks after NR.

As an embodiment, the suitable cell includes a suitable NR cell.

As an embodiment, the NR cell is a cell of the NR network.

As an embodiment, if a suitable cell is selected, the first node sends an RRC connection reestablishment request via a direct path.

As an embodiment, a suitable L2 U2N relay UE is selected, and the first node sends an RRC connection reestablishment request via a non-direct path.

As an embodiment, the suitable NR cell is an NR cell that meets certain channel quality.

As an embodiment, the suitable L2 U2N relay UE is a L2 U2N relay UE that meets certain channel quality.

As an embodiment, expiration of the first timer triggers the first node to enter the RRC idle state.

As an embodiment, the first timer is a T311 timer.

As an embodiment, the physical layer of the SpCell is the physical layer of the first node for communicating with the SpCell.

As an embodiment, the physical layer of the SpCell is the physical layer of the first node used to measure the SpCell signal.

As an embodiment, the phrase "a problem is detected in the physical layer of the SpCell" includes: the physical layer of the first node reports that the measurement result on the reference signal resource of the SpCell is worse than a certain threshold.

As an embodiment, the phrase "a problem is detected in the physical layer of the SpCell" means that: the measurement result reported by the physical layer of the first node on the reference signal resource used to monitor the wireless link quality of the SpCell is worse than a certain threshold.

As an example, the phrase "a problem has been detected in the physical layer of the SpCell" includes: receiving N1 consecutive out-of-sync indications from a lower layer of the SpCell.

As an embodiment, the first signaling indicates the N1.

As an embodiment, N1 is a positive integer.

As an embodiment, the N310 field of the first signaling indicates the N1.

As an embodiment, the N311 field of the first signaling indicates the N.

As an embodiment, the lower layer includes a physical layer.

As an embodiment, the lower layer includes a layer below the RRC layer.

As an embodiment, the continuous out-of-sync indication means that no synchronization indication for the physical layer of the SpCell is received between the N1 out-of-sync indications.

As an embodiment, the continuous out-of-sync indication means that the N1 out-of-sync indications are not mixed with in-sync indications for the physical layer of the SpCell.

As an embodiment, the second timer is for MCG.

As an embodiment, the lower layer for SpCell includes a protocol layer for SpCell below the RRC layer.

As an embodiment, the lower layer for SpCell includes a physical layer for SpCell.

As an embodiment, the phrase receiving N consecutive synchronization indications from a lower layer for SpCell includes: the physical layer of the first node sends an in-sync indication to the RRC layer of the first node based on that the measurement result on the reference signal resource used to monitor the wireless link quality of the SpCell is better than a specific threshold.

As an embodiment, when N consecutive synchronization indications are received, the risk of wireless link failure of the SpCell is eliminated.

As an embodiment, the N consecutive synchronization indications are that no out-of-synchronization indication is received from the physical layer for the SpCell between the N synchronization indications.

As an embodiment, the second timer is a T310 timer.

As an embodiment, expiration of the second timer is used to determine or trigger a radio link failure for the SpCell.

As an embodiment, the first node being a first type of UE means that the first node uses both an indirect path and a A direct path is used, and an indirect path is a specific path.

As an embodiment, the meaning that the first node does not behave as a first-category UE includes: the first node uses both an indirect path and a direct path, and the direct path is a specific path.

As an embodiment, the meaning that the first node does not behave as a first-class UE includes: the first node behaves as an L2 U2N remote UE and is configured with a direct path.

As an embodiment, the meaning that the first node does not behave as a first-class UE includes: the first node behaves as an L2 U2N remote UE and uses a direct path.

As an embodiment, the meaning that the first node does not behave as a first-class UE includes: the first node behaves as an L2 U2N remote UE and uses multipath.

As an embodiment, the meaning that the first node does not behave as a first-class UE includes: the first node behaves as an L2 U2N remote UE and is configured with multipath.

As an embodiment, the meaning that the first node does not appear as a first-type UE includes: the first node appears as an L2 U2N remote UE configured with a direct path.

As an embodiment, the meaning that the first node does not behave as a first-class UE includes: the first node behaves as an L2 U2N remote UE using a direct path.

As an embodiment, the meaning that the first node does not behave as a first-class UE includes: the first node behaves as an L2 U2N remote UE using multipath.

As an embodiment, the meaning that the first node does not appear as a first-class UE includes: the first node appears as an L2 U2N remote UE configured with multipath.

As an embodiment, the meaning that the first node does not appear as a first-class UE includes: the first node does not appear as an L2 U2N remote UE that is only configured with a non-direct path.

As an embodiment, the meaning that the first node does not behave as a first-class UE includes: the first node does not behave as an L2 U2N remote UE that only uses a direct path.

As an embodiment, the meaning that the first node does not appear as a first-category UE includes: the first node does not appear as an L2 U2N remote UE.

As a sub-embodiment of this embodiment, the first node is an L2 U2N remote UE.

As an embodiment, the meaning that the first node does not behave as a first-category UE includes: the first node does not meet the conditions for behaving as a first-category UE.

As an embodiment, the specific path is a main path among the indirect path and the direct path.

As an embodiment, the specific path is a path configured with a control plane among an indirect path and a direct path.

As an embodiment, the specific path is used to transmit or associate a path of SRB1.

As an embodiment, a specific path is preconfigured.

As an embodiment, a specific path is specified.

As an embodiment, the first node is a L2 U2N remote UE.

As an embodiment, the phrase “the first node is a L2 U2N remote UE” means that the first node selects a L2 U2N relay UE.

As an embodiment, the phrase “the first node is a L2 U2N remote UE” means that the first node establishes a connection with a L2 U2N relay UE for relaying.

As an embodiment, the phrase “the first node is a L2 U2N remote UE” means that the first node communicates with the network through a L2 U2N relay UE.

As an embodiment, the phrase that the first node is a L2 U2N remote UE includes: the first node uses the relay service of the L2 U2N relay UE.

As an embodiment, the phrase “the first node is a L2 U2N remote UE” means that the first node communicates with the network through a U2N relay UE.

As an embodiment, the phrase that the first node is an L2 U2N remote UE includes: the first node communicates with the network in a manner including through a U2N relay UE.

As an embodiment, the phrase said first signaling is used to configure a non-direct path including: configuring a SRAP (Sidelink Relay Adaptation Protocol) layer of a L2 U2N remote UE;

The first node does not appear to be a first-category UE.

As an embodiment, the phrase configuring the SRAP layer of the L2 U2N remote UE includes: configuring the SRAP layer of the first node.

As an embodiment, the phrase configuring the SRAP layer of the L2 U2N remote UE includes: the first signaling includes SL-SRAP-Config.

As an embodiment, the phrase configuring the SRAP layer of the L2 U2N remote UE includes: configuring the RLC channel.

As an embodiment, the phrase configuring the SRAP layer of the L2 U2N remote UE includes: configuring an RLC channel for communicating with the network.

As an embodiment, the phrase configuring the SRAP layer of the L2 U2N remote UE includes: configuring the RLC channel of the PC5 interface.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in FIG2 .

FIG2 illustrates a diagram of a network architecture 200 of a 5G NR, LTE (Long-Term Evolution) and LTE-A (Long-Term Evolution Advanced) system. The 5G NR or LTE network architecture 200 may be referred to as a 5GS (5G System)/EPS (Evolved Packet System) 200 or some other suitable terminology. The 5GS/EPS 200 may include one or more UEs (User Equipment) 201, NG-RAN (Next Generation Radio Access Network) 202, 5GC (5G Core Network, 5G Core Network)/EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server)/UDM (Unified Data Management) 220 and Internet services 230. The 5GS/EPS may be interconnected with other access networks, but these entities/interfaces are not shown for simplicity. As shown, 5GS/EPS provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol terminations toward UE 201. gNB 203 can be connected to other gNBs 204 via an Xn interface (e.g., backhaul). gNB 203 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 term. gNB 203 provides an access point to 5GC/EPC 210 for UE 201. Examples of UE 201 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband Internet of Things devices, machine type communication devices, land vehicles, cars, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term. The gNB 203 is connected to the 5GC/EPC 210 via the S1/NG interface. The 5GC/EPC 210 includes MME (Mobility Management Entity)/AMF (Authentication Management Field)/SMF (Session Management Function) 211, other MME/AMF/SMF 214, S-GW (Service Gateway)/UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway)/UPF 213. The MME/AMF/SMF 211 is a control node that processes signaling between the UE 201 and the 5GC/EPC 210. In general, the MME/AMF/SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW/UPF212, which is itself connected to P-GW/UPF213. P-GW provides UE IP address allocation and other functions. P-GW/UPF213 is connected to Internet service 230. Internet service 230 includes operator-corresponding Internet protocol services, which may specifically include Internet, intranet, IMS (IP Multimedia Subsystem) and packet-switched streaming services.

As an embodiment, the first node in the present application is UE201.

As an embodiment, the second node in the present application is gNB203.

As an embodiment, the wireless link from the UE201 to the NR Node B is an uplink.

As an embodiment, the wireless link from the NR Node B to UE201 is a downlink.

As an embodiment, the UE 201 supports relay transmission.

As an embodiment, the UE 201 includes a mobile phone.

As an embodiment, the UE 201 is a vehicle including a car.

As an embodiment, the gNB203 is a macrocellular base station.

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

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

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

As an embodiment, the gNB203 is a satellite device.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a wireless protocol architecture for a user plane and a control plane according to the present application, as shown in FIG3. FIG3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300. FIG3 shows the radio protocol architecture of the control plane 300 for a first node (UE, satellite or aircraft in gNB or NTN) and a second node (satellite or aircraft in gNB, UE or NTN), or between two UEs using three layers: layer 1, layer 2, and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to as PHY301 herein. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the first node and the second node and the two UEs through PHY301. 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. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by encrypting data packets, and provides support for inter-zone mobility of the first node between the second node. The RLC sublayer 303 provides segmentation and reassembly of upper layer data packets, retransmission of lost data packets, and reordering of data packets to compensate for out-of-order reception due to HARQ. The MAC sublayer 302 provides multiplexing between logical and transport channels. The MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) in a cell between the first nodes. The MAC sublayer 302 is also responsible for HARQ 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 second node and the first node. The PC5-S (PC5 Signaling Protocol) sublayer 307 is responsible for processing the signaling protocol of the PC5 interface. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). The radio protocol architecture for the first node and the second node in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 also includes a SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping between QoS flows and data radio bearers (DRBs) to support the diversity of services. SRB can be regarded as a service or interface provided by the PDCP layer to a higher layer, such as the RRC layer. In the NR system, SRBs include SRB1, SRB2, SRB3, and SRB4 when it comes to sidelink communication, which are used to transmit different types of control signaling. SRB is a bearer between the UE and the access network, and is used to transmit control signaling including RRC signaling between the UE and the access network. SRB1 has a special meaning for the UE. After each UE establishes an RRC connection, there will be SRB1 for transmitting RRC signaling. Most of the signaling is transmitted through SRB1. If SRB1 is interrupted or cannot be used, the UE must perform RRC reconstruction. SRB2 is generally only used to transmit NAS signaling or signaling related to security. The UE may not configure SRB3. Except for emergency services, the UE must establish an RRC connection with the network for subsequent communications. Although not shown, the first node may have several upper layers above the L2 layer 355. In addition, it also includes a network layer (e.g., IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., remote UE, server, etc.). For UEs involved in relay services, its control plane may also include an adaptation sublayer SRAP (Sidelink Relay Adaptation Protocol) 308, and its user plane may also include an adaptation sublayer SRAP358. The introduction of the adaptation layer helps lower layers, such as the MAC layer, such as the RLC layer, to multiplex and/or distinguish data from multiple source UEs. For nodes not involved in relay communication, PC5-S307, SRAP308, SRAP358 are not required during the communication process.

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 first signaling in the present application is generated in RRCC306.

As an embodiment, the first measurement report in the present application is generated by RRCC306.

As an embodiment, the first notification message in the present application is generated in RRCC306.

As an embodiment, the second signaling in the present application is generated in RRCC306.

As an embodiment, the third signaling in the present application is generated in RRCC306.

Example 4

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

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, and may optionally also include 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 receiving processor 470 , a transmitting processor 416 , and may optionally also include a multi-antenna receiving processor 472 , a multi-antenna transmitting 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, the upper layer data packets from the core network are provided to the controller/processor 475. The controller/processor 475 implements the functionality of the L2 (Layer-2) layer. In the transmission from the second communication device 410 to the first communication device 450, the controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller/processor 475 is also responsible for the retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes with a reference signal (e.g., a pilot) in the time domain and/or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. The multi-antenna transmit processor 471 then performs a transmit analog precoding/beamforming operation on the time-domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream and provides it to the receiving processor 456. The receiving processor 456 and the multi-antenna receiving processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiving processor 458 performs a receiving analog precoding/beamforming operation on the baseband multi-carrier symbol stream from the receiver 454. The receiving processor 456 uses a fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receiving analog precoding/beamforming operation from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiving processor 456, wherein the reference signal will be used for channel estimation, and the data signal is recovered after multi-antenna detection in the multi-antenna receiving processor 458 to any spatial stream destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in the receiving processor 456, and soft decisions are generated. The receiving processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller/processor 459. The controller/processor 459 implements the functions of the L2 layer. The controller/processor 459 may be associated with a memory 460 that stores program codes and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the second communication device 450, the controller/processor 459 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper layer data packets from the core network. The upper layer data 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, at the first communication device 450, a data source 467 is used to provide upper layer data packets to the controller/processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission function at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller/processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, and implements L2 layer functions for user plane and control plane. The controller/processor 459 is also responsible for the retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Then, the transmit processor 468 modulates the generated spatial stream into a multi-carrier/single-carrier symbol stream, which is then provided to different antennas 452 via the transmitter 454 after analog precoding/beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first transmits the multi-antenna transmit processor 457 to provide The baseband symbol stream is converted into a radio frequency symbol stream and then provided to the 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 reception 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 a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna reception processor 472 and the reception processor 470. The reception processor 470 and the multi-antenna reception processor 472 jointly implement the functions of the L1 layer. The controller/processor 475 implements the L2 layer functions. The controller/processor 475 can be associated with a memory 476 storing program codes and data. The memory 476 can be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller/processor 475 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover the upper layer data packets from the UE 450. Upper layer packets from controller/processor 475 may be provided to the core network.

As an embodiment, the first communication device 450 apparatus includes: receiving a first signaling; the first signaling is used to configure SpCell; as a response to receiving the first signaling, executing a target operation set, and whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE; the first signaling is used to configure a non-direct path; wherein, the sentence whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE means: when the first node behaves as a first-class UE, the target operation set does not include the first operation set; when the first node does not behave as a first-class UE, the target operation set includes the first operation set; whether a direct path is used to determine whether the first node behaves as a first-class UE, and when only a non-direct path is used, the The first node behaves as a first type of UE; when both an indirect path and a direct path are used, the first node does not behave as a first type of UE; the direct path is to transmit information through an L2 U2N relay; the indirect path is not to transmit information through an L2 U2N relay; the target operation set includes at least configuring a first timer; the first operation set includes configuring a second timer and N; the start condition of the first timer includes initiating RRC connection reconstruction, and the stop condition of the first timer includes selecting a suitable NR cell or selecting a suitable L2 U2N relay UE; the start condition of the second timer includes: detecting a problem with the physical layer of the SpCell; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for the SpCell; the first type of UE uses an indirect path.

As an embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates an action when executed by at least one processor, the action including: receiving a first signaling; the first signaling is used to configure the SpCell; as a response to receiving the first signaling, executing a target operation set, and whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE; the first signaling is used to configure a non-direct path; wherein, the sentence whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE means: when the first node behaves as a first-class UE, the target operation set does not include the first operation set; when the first node does not behave as a first-class UE, the target operation set includes the first operation set; whether to use a direct path to determine the first Whether the node behaves as a first type of UE, when only an indirect path is used, the first node behaves as a first type of UE; when both an indirect path and a direct path are used, the first node does not behave as a first type of UE; the direct path is to transmit information through an L2 U2N relay; the indirect path is not to transmit information through an L2 U2N relay; the target operation set includes at least configuring a first timer; the first operation set includes configuring a second timer and N; the start condition of the first timer includes initiating RRC connection reconstruction, and the stop condition of the first timer includes selecting a suitable NR cell or selecting a suitable L2 U2N relay UE; the start condition of the second timer includes: detecting a problem with the physical layer of the SpCell; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for the SpCell; the first type of UE uses an indirect path.

As an embodiment, the first communication device 450 corresponds to the first node in this application.

As an embodiment, the second communication device 410 corresponds to the second node in this application.

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

As an embodiment, the first communication device 450 is a vehicle-mounted terminal.

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

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

As an embodiment, the second communication device 410 is a vehicle-mounted terminal.

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

As an embodiment, the second communication device 410 is an Internet of Things device.

As an embodiment, the receiver 454 (including the antenna 452), the receiving processor 456 and the controller/processor 459 are used to receive the first signaling in the present application.

As an embodiment, the receiver 454 (including the antenna 452), the receiving processor 456 and the controller/processor 459 are used to receive the second signaling in the present application.

As an embodiment, the receiver 454 (including the antenna 452 ), the receiving processor 456 and the controller/processor 459 are used to receive the third signaling in the present application.

As an embodiment, the receiver 454 (including the antenna 452), the receiving processor 456 and the controller/processor 459 are used to receive the first notification message in the present application.

As an embodiment, the transmitter 454 (including the antenna 452), the transmission processor 468 and the controller/processor 459 are used to send the first measurement report in the present application.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in FIG5. In FIG5, U01 corresponds to the first node of the present application, and it is particularly noted that the order in this example does not limit the signal transmission order and implementation order in the present application, wherein the steps in F51 are optional.

For the first node U01 , a first signaling is received in step S5101; a target operation set is executed in step S5102; a first measurement report is sent in step S5103; a second signaling is received in step S5104; a third signaling is received in step S5105; and a first notification message is received in step S5106.

For the second node U02 , a first signaling is sent in step S5201; a first measurement report is received in step S5202; a second signaling is sent in step S5203; and a third signaling is received in step S5204.

In embodiment 5, the first signaling is used to configure the SpCell; as a response to receiving the first signaling, whether the target operation set includes the first operation set is related to whether the first node behaves as a first type of UE; the first signaling is used to configure an indirect path;

As an embodiment, the first node U01 is a UE.

As an embodiment, the first node U01 is a U2N remote UE.

As an embodiment, the second node U02 is a network node.

As an embodiment, the second node U02 is a cell.

As an embodiment, the second node U02 is a base station.

As an embodiment, the second node U02 is the PCell of the first node U01.

As an embodiment, the second node U02 is the PSCell of the first node U01.

As an embodiment, the second node U02 is the SpCell of the first node U01.

As an embodiment, the first signaling is forwarded via a relay.

As an embodiment, the first signaling is sent using an indirect path.

As an embodiment, the first signaling is sent using a direct path.

As an embodiment, the first signaling is sent using both a direct path and an indirect path.

As an embodiment, the first signaling is used to configure a non-direct path.

As an embodiment, the meaning that the first signaling is used to configure an indirect path includes: the first signaling is used to add an indirect path.

As an embodiment, the first signaling is used to configure the indirect path, which means: the first signaling is used to reconfigure the indirect path. path.

As an embodiment, the first signaling is used to add a direct path.

As an embodiment, step S5102 is a part of executing the first signaling.

As an embodiment, the first signaling includes a measurement configuration, and the measurement configuration is associated with the first measurement report.

As an embodiment, the first signaling includes a measurement configuration, and the first measurement report is generated according to the measurement configuration indicated by the first signaling.

As an embodiment, the first signaling includes a measurement report configuration, and the first measurement report is generated according to the measurement report configuration indicated by the first signaling.

As an embodiment, the measurement configuration includes a reference signal resource targeted for measurement.

As an embodiment, the measurement configuration includes the relay UE targeted for the measurement.

As an embodiment, the first measurement report is sent via an RRC message.

As an embodiment, the first measurement report is for the secondary link.

As an embodiment, the first measurement report is or includes sl-MeasResultServingRelay.

As an embodiment, the first measurement report includes the SL-RSRP (sidelink Reference Signal Receiving Power) measurement result of the served L2 U2N relay UE.

As an embodiment, the first measurement report includes the SD-RSRP (sidelink discovery Reference Signal Receiving Power) measurement result of the served L2 U2N relay UE.

As an embodiment, the first measurement report includes the SL-RSRP (sidelink Reference Signal Receiving Power) measurement result of the candidate L2 U2N relay UE.

As an embodiment, the first measurement report is used for path switching or selecting a target L2 U2N relay UE.

As an embodiment, the first measurement report includes the identity of the target relay UE.

As a sub-embodiment of this embodiment, the first measurement report includes the SL-RSRP measurement result of the target relay UE.

As a sub-embodiment of this embodiment, the first measurement report includes identities of X target relays and corresponding SL-RSRP measurement results of the X target relay UEs, where X is a positive integer.

As an embodiment, the first measurement report is event triggered.

As an embodiment, the first measurement report is a periodic report.

As an embodiment, when sending the first measurement report, the first node U01 does not behave as a first type UE.

As an embodiment, the second signaling is a system information block.

As an embodiment, the second signaling is SIB.

As an embodiment, the second signaling is SIB1.

As an embodiment, the first signaling includes a first candidate value of the third timer; and the second signaling includes a second candidate value of the third timer.

As an embodiment, the first candidate value is different from the first candidate value.

As an embodiment, the first candidate value is configured independently from the second candidate value.

As an embodiment, the starting condition of the third timer includes sending an RRC connection resume request message.

As an embodiment, initiating the RRC connection continuation process includes starting the third timer.

As an embodiment, the third timer is started along with initiating the RRC connection continuation procedure.

As an embodiment, the stop condition of the third timer includes receiving an RRC connection continue message.

As an embodiment, receiving an RRC connection continue message triggers stopping the third timer.

As an embodiment, the RRC connection continuation request message is an uplink message.

As an embodiment, the RRC connection continuation message is a downlink message.

As an embodiment, whether the third timer uses the first candidate value or the second candidate value is related to whether the RRC connection continuation request message uses a direct path or an indirect path.

As an embodiment, when the first node U01 behaves as a first-category UE, the third timer uses the first candidate value; when the first node U01 does not behave as a first-category UE, the third timer uses the second candidate value.

As an embodiment, when the first node U01 behaves as a first type of UE, the third timer uses the second candidate value; When the first node U01 does not appear as a first-category UE, the third timer uses the first candidate value.

As an embodiment, the RRC connection continuation request message is sent via CCCH (common control channel) or CCCH1 channel.

As an embodiment, the RRC connection continuation message is sent via DCCH (dedicated control channel).

As an embodiment, the third signaling is used to indicate entering into an RRC inactive state; the first node U01, in response to receiving the third signaling, replaces the physical cell identity with the target identity.

As an embodiment, the first node U01 is a L2 U2N remote node.

As an embodiment, the first identity is the physical cell identity of the cell that sends the third signaling.

As an embodiment, the second identity is the physical cell identity included in the discovery message of the L2 U2N relay UE of the first node.

As an embodiment, the third signaling is RRC signaling.

As an embodiment, the third signaling is RRCRelease signaling.

As an embodiment, the third signaling includes suspendConfig.

As an embodiment, the third signaling includes suspendConfig for indicating entering into an RRC inactive state (RRC_INACTIVE).

As an embodiment, after executing the third signaling, the first node U01 enters an RRC inactive state.

As an embodiment, the sentence replacing the physical cell identity with the target identity as a response to receiving the third signaling includes: execution of the third signaling includes replacing the physical cell identity with the target identity.

As an embodiment, replacing the physical cell identity with the target identity means: replacing the saved physical cell identity with the target cell identity.

As an embodiment, replacing the physical cell identity with the target identity means: saving the target cell identity as the physical cell identity.

As an embodiment, the third signaling includes a third domain, and the third domain of the third signaling is used to configure the C-RNTI (cell Radio Network Temporary Identifier) of the first node U01.

As an embodiment, the third signaling includes a third domain, and the name of the third domain includes sl-UEIdentityRemote.

As an embodiment, the third signaling includes a third domain, and the third domain is sl-UEIdentityRemote.

As an embodiment, the third field of the third signaling is used to configure the C-RNTI of the first node.

As an embodiment, the meaning of the sentence that the third field of the third signaling is used to configure the C-RNTI of the first node U01 includes: the first node U01 replaces the C-RNTI with the value of the third field included in the third signaling.

As an embodiment, the meaning of the sentence that the third field of the third signaling is used to configure the C-RNTI of the first node U01 includes: the first node U01 saves the value of the third field included in the third signaling as C-RNTI.

As an embodiment, the physical cell identity of the cell that sends the third signaling is the identity of the second node U02.

As an embodiment, the physical cell identity of the cell that sends the third signaling is the identity of the PCell of the first node U01.

As an embodiment, the physical cell identity of the cell that sends the third signaling is the physical cell identity of the second node U02.

As an embodiment, whether the target identity is the first identity or the second identity is related to whether the first node uses a direct path.

As an embodiment, whether the target identity is the first identity or the second identity is related to whether the first node behaves as a first type UE.

As an embodiment, when the first node U01 uses a direct path, the target identity is the first identity; when the first node U01 does not use a direct path, the target identity is the second identity.

As an embodiment, when the first node U01 behaves as a first-category UE, the target identity is the first identity; when the first node U01 does not behave as a first-category UE, the target identity is the second identity.

As an embodiment, the first node U01 has the L2 U2N relay UE.

As an embodiment, the L2 U2N relay UE of the first node U01 periodically sends discovery messages.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 is a PC5-S message.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 is a NAS message of the PC5 interface.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 is used to be received by the U2N remote UE Discover.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 is used to discover the U2N remote UE.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 indicates the identity of the L2 U2N relay UE.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 indicates the service cell of the L2 U2N relay UE.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 indicates the physical cell identity of the service cell of the L2 U2N relay UE.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 indicates whether the L2 U2N relay UE provides relay service.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 indicates the relay service code of the L2 U2N relay UE.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 indicates the PLMN (Public Land Mobile Network) of the L2 U2N relay UE.

As an embodiment, the discovery message sent by the L2 U2N relay UE of the first node U01 is sent via SRB4.

As an embodiment, the sl-PhysCellId of the sl-ServingCellInfo included in the discovery message sent by the L2 U2N relay UE of the first node U01 indicates the second identity.

As an embodiment, the first identity is different from the second identity.

As an embodiment, the serving cell indicated by the first identity is different from the serving cell indicated by the second identity.

As an embodiment, the service cells indicated by the first identity and the second identity belong to the same cell group.

As an embodiment, the service cell indicated by the first identity and the second identity belongs to the MCG of the first node U01.

As an embodiment, the first node U01 has multiple L2 U2N relay UEs.

As an embodiment, the first node U01 maintains connection with multiple L2 U2N relay UEs.

As an embodiment, the first node U01 maintains a connection for U2N relay with multiple L2 U2N relay UEs.

As an embodiment, the first node U01 has only one L2 U2N relay UE.

As an embodiment, the first node U01 only maintains connection with one L2 U2N relay UE.

As an embodiment, the first node U01 maintains a connection with only one L2 U2N relay UE for U2N relay.

As an embodiment, the sender of the first notification message is not the second node U02.

As an embodiment, the sender of the first notification message is the U2N relay UE of the first node U01.

As an embodiment, the first notification message is sent via a secondary link.

As an embodiment, the first notification message is an RRC message.

As an embodiment, the first notification message is an RRC message of the PC5 interface.

As an embodiment, the first notification message includes a NotificationMessageSidelink.

As an embodiment, the L2 U2N relay UE of the first node U01 sends the first notification message in response to cell reselection.

As a sub-embodiment of this embodiment, the relayUE-CellReselection included in the first notification message indicates that cell reselection has occurred.

As an embodiment, the L2 U2N relay UE of the first node U01 sends the first notification message in response to receiving the RRCReconfiguration message including reconfigurationWithSync.

As a sub-embodiment of this embodiment, the relayUE-HO included in the first notification message indicates synchronous reconfiguration.

As an embodiment, the L2 U2N relay UE of the first node U01 sends the first notification message in response to a wireless link failure of the Uu interface.

As a sub-embodiment of this embodiment, the relayUE-Uu-RLF included in the first notification message indicates that a radio link failure of the Uu interface occurs.

As an embodiment, the L2 U2N relay UE of the first node U01 sends the first A notification message.

As a sub-embodiment of this embodiment, the relayUE-Uu-RRC-Failure included in the first notification message indicates that an RRC connection re-establishment failure occurs or an RRC connection continuation failure occurs.

As an embodiment, the meaning of the sentence when the first node uses a direct path includes: when the first node U01 at least uses a direct path.

As an embodiment, the meaning of the sentence when the first node uses a direct path includes: when the first node U01 only uses a direct path.

As an embodiment, the meaning of the sentence when the first node uses a direct path includes: when the first node U01 uses both an indirect path and a direct path.

As an embodiment, the meaning of the sentence when the first node does not use a direct path includes: the first node U01 only uses an indirect path.

As an embodiment, the meaning of the sentence when the first node does not use a direct path includes: the first node U01 is not configured with a direct path.

As an embodiment, the sending of the first notification message is due to the occurrence of Uu RLF (radio link failure) in the L2 U2N relay UE of the first node, or synchronization reconfiguration, or cell reselection, or RRC connection reestablishment failure, or RRC connection continuation failure.

As an embodiment, the first node U01 is in an RRC connected state.

As an embodiment, whether the first notification message triggers RRC (radio resource control) connection reconstruction is related to whether the first node uses a direct path.

As an embodiment, when the first node uses a direct path, the first notification message does not trigger RRC connection reconstruction; when the first node does not use a direct path, the first notification message triggers RRC connection reconstruction.

As an embodiment, whether the first notification message triggers RRC (radio resource control) connection reconstruction is related to whether the first node behaves as the first type of UE.

As an embodiment, when the first node U01 behaves as the first type UE, the first notification message triggers RRC connection reconstruction; when the first node U01 does not behave as the first type UE, the first notification message does not trigger RRC connection reconstruction.

As an embodiment, the sentence when the first node uses a direct path, the first notification message does not trigger RRC connection reconstruction; when the first node does not use a direct path, the first notification message triggers RRC connection reconstruction includes: the first notification message triggers RRC connection reconstruction only when the first node U01 does not use a direct path.

As an embodiment, the sentence when the first node U01 behaves as the first type UE, the first notification message triggers RRC connection reconstruction; when the first node U01 does not behave as the first type UE, the first notification message does not trigger RRC connection reconstruction means: only when the first node U01 behaves as the first type UE, the first notification message triggers RRC connection reconstruction.

Example 6

Embodiment 6 illustrates a schematic diagram of a protocol stack according to an embodiment of the present application, as shown in FIG6 .

Figure 6 is divided into two sub-figures (a) and (b).

The protocol stack shown in Figure 6 is applicable to L2 U2N relay communication, and Example 6 is based on Example 3.

(a) in FIG. 6 corresponds to the protocol stack when using indirect path communication; (b) in FIG. 6 corresponds to the protocol stack when using direct path communication.

The prefix "Uu-" in FIG. 6 indicates the protocol of the Uu interface; the prefix "PC5-" indicates the protocol of the PC5 interface.

As an embodiment, the first relay in FIG. 6 is a relay when the first node uses a non-direct path.

As an embodiment, the first relay is an L2 U2N relay UE for communication between the first node and the MCG.

As an embodiment, the second node in FIG. 6 is the PCell of the first node or the gNB corresponding to the PCell.

As an embodiment, the second node in Figure 6 is the MCG of the first node or the gNB corresponding to the MCG.

As an embodiment, the second node in FIG. 6 is the gNB to which the first node is connected.

As an embodiment, the second node in FIG. 6 is the gNB to which the first relay is connected.

As an embodiment, the second node in FIG. 6 is a DU (data unit) or a serving cell to which the first relay is connected.

As an embodiment, the second node in FIG. 6 is a network node.

As an embodiment, there is an RRC connection between the second node in FIG. 6 and the first node.

As an embodiment, the second node in FIG. 6 corresponds to the second node in Embodiment 5 of the present application.

In Example 6, the PC5 interface is the interface between the first node and the first relay, and the protocol entities related to the PC5 interface {PC5-SRAP, PC5-RLC, PC5-MAC, PC5-PHY} are terminated at the first node and the first relay; the Uu interface is the interface between the UE and the second node, and the protocol entities of the Uu interface are terminated at the UE and the second node respectively.

As an embodiment, the first relay is a U2N relay UE, and before executing the first signaling, the first relay provides L2 U2N relay service to the first node.

As an embodiment, the first relay is a U2N relay UE. Before executing the first signaling, the first relay does not provide L2 U2N relay service to the first node. After receiving the first signaling, the first node uses the U2N relay service provided by the first relay.

As an embodiment, the first node and the first relay are both UEs.

As an embodiment, the protocol entities {Uu-SRAP, Uu-RLC, Uu-MAC, Uu-PHY} of the Uu interface are terminated at the first relay and the second node.

As an embodiment, in (a), the protocol entity {Uu-PDCP} of the Uu interface terminates at the first node and the second node, and the PDCP PDU of the first node is forwarded by the first relay, but the first relay does not modify the PDCP PDU of the first node, that is, the PDCP PDU sent by the first node to the network is transparent to the first relay.

As an embodiment, in (a), PC5-SRAP corresponds to SRAP357 in FIG. 3 , PC5-RLC corresponds to RLC353 in FIG. 3 , PC5-MAC corresponds to MAC352 in FIG. 3 , and PC5-PHY corresponds to PHY351 in FIG. 3 .

As an embodiment, in (a), for the user plane of the first node, there is Uu-SDAP on top of Uu-PDCP; for the control plane of the first node, there is Uu-RRC layer on top of Uu-PDCP.

As an embodiment, Uu-SDAP corresponds to SDAP356 in FIG. 3 , Uu-PDCP corresponds to PDCP354 in FIG. 3 ; and Uu-RRC corresponds to RRC306 in FIG. 3 .

As an embodiment, a cell of the second node in FIG. 6 is the PCell of the first relay, and the first relay is in an RRC connected state.

As an embodiment, the first node is in an RRC connected state.

As an embodiment, the MCG of the first node is also the MCG of the first relay.

As an embodiment, PC5-SRAP is used only for specific RBs or messages or data.

As a sub-embodiment of this embodiment, when the first relay forwards the system information of the gNB, the PC5-SRAP layer is not used.

As an embodiment, the SRB1 of the first node is the SRB1 between the first node and the second node in FIG. 6( a ), and the associated protocol entities include Uu-PDCP and Uu-RRC.

As an embodiment, in Embodiment 6, the communication between the first node and the second node uses a non-direct path.

As an embodiment, in Embodiment 6, the communication between the first node and the second node uses a direct path.

As an embodiment, in Embodiment 6, the communication between the first node and the second node uses both a direct path and an indirect path.

As an embodiment, the first signaling is transparently transmitted to the first relay.

As an embodiment, the transmission of the first signaling does not use the first relay, and the transmission of the first signaling is applicable to Figure 6(c).

As an embodiment, the first signaling is applicable to the protocol structure of FIG. 6( a ).

As an embodiment, the first signaling is applicable to the protocol structure of FIG. 6( b ).

As an embodiment, when a non-direct path is used, the Uu-PDCP of the first node is associated with PC5-RLC, or is associated with PC5-RLC through PC5-SRAP.

As an embodiment, when a direct path is used, the first node establishes Uu-RLC, and the Uu-PDCP of the first node is associated with the Uu-RLC.

As a sub-embodiment of this embodiment, after switching to the direct path, the first node releases PC5-RLC.

As a sub-embodiment of this embodiment, after switching to the direct path, the first node releases PC5-SRAP.

As a sub-embodiment of this embodiment, after switching to the direct path, the first node releases PC5-MAC and PC5-PHY.

As a sub-embodiment of this embodiment, after switching to the direct path, the first node no longer uses PC5-SRAP.

As a sub-embodiment of this embodiment, after switching to the direct path, there is no other protocol layer between the Uu-PDCP and Uu-RLC of the first node.

As an embodiment, (b) in FIG. 6 is a protocol stack for communication between the first node and the second node when relay is not used.

As an embodiment, (b) in FIG. 6 is a protocol stack for communication between the first node and the second node when a direct path is used.

As an embodiment, the main path is a link when the first node and the second node communicate using (b).

As an embodiment, the main path is a link when the first node and the second node communicate using (a).

As an embodiment, the specific path is a link when the first node and the second node communicate using (b).

As an embodiment, the specific path is a link when the first node and the second node communicate using (a).

As an embodiment, the third node in FIG. 6 is the PCell of the first node or the gNB corresponding to the PCell.

As an embodiment, the third node in Figure 6 is the MCG of the first node or the gNB corresponding to the MCG.

As an embodiment, the third node in FIG. 6 is the gNB to which the first node is connected.

As an embodiment, the third node in FIG. 6 is a DU or a serving cell to which the first node is connected.

As an embodiment, the third node in FIG. 6 is a network node.

As an embodiment, there is an RRC connection between the third node in FIG. 6 and the first node.

As an embodiment, the third node in FIG. 6 corresponds to the second node in Embodiment 5 of the present application.

As an embodiment, the second node is the third node.

As an embodiment, the second node is not the third node.

As an embodiment, a communication interface is provided between the second node and the third node.

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

As an embodiment, the third node is the sender of the first signaling.

As an embodiment, the second node is a sender of the second signaling.

As an embodiment, the third node is the sender of the second signaling.

As an embodiment, the second node is the sender of the third signaling.

As an embodiment, the third node is the sender of the third signaling.

As an embodiment, the first relay is the sender of the first notification message.

As an embodiment, a UE that only uses protocol stack (a) behaves as the first type of UE.

As an embodiment, a UE using protocol stack (b) does not behave as the first type of UE.

Example 7

Embodiment 7 illustrates a schematic diagram of a protocol stack according to an embodiment of the present application, as shown in FIG7 .

Example 7 further illustrates the protocol stack when the first node uses a direct path and an indirect path at the same time based on Example 3. In FIG. 7 , the first PDCP entity of the first node is associated with two RLC entities, namely RLC1 and RLC2.

As an embodiment, each RLC entity associated with the first PDCP entity is respectively associated with a different MAC, that is, RLC1 is associated with MAC1, and RLC2 is associated with MAC2.

As an embodiment, each RLC entity associated with the first PDCP entity is respectively associated with the same MAC, that is, RLC1 is associated with MAC1, and RLC2 is associated with MAC2, and the MAC1 is the MAC2.

As an example, FIG. 7 is applicable to RB.

As an embodiment, FIG. 7 is applicable to SRBs including SRB1.

As an example, FIG. 7 is applicable to DRB.

As an embodiment, the protocol structure shown in FIG7 is a split SRB, namely split SRB.

As an embodiment, the protocol structure shown in FIG7 is a split DRB, namely split DRB.

As an example, FIG. 7 is applicable to sending.

As an example, FIG. 7 is applicable to reception.

As an embodiment, the first protocol entity in FIG. 7 is RRC, and FIG. 7 is for SRBs including SRB1.

As an embodiment, the first protocol entity in FIG. 7 is SDAP, and FIG. 7 is for DRB.

As an embodiment, the PDCP PDU formed by the RRC message being processed by the PDCP entity is sent through RLC1.

As an embodiment, the PDCP PDU formed by the RRC message being processed by the PDCP entity is sent through RLC2.

As an embodiment, the PDCP PDU formed by the RRC message being processed by the PDCP entity is sent through RLC1 or RLC2.

As an embodiment, the PDCP PDU formed by the RRC message processing by the PDCP entity is copied and sent through RLC1 and RLC2 at the same time.

As an embodiment, the SRB1 is used to carry the first signaling and the first message.

As an embodiment, the main path of SRB1 is for RLC1.

As an embodiment, the main path of SRB1 is for RLC2.

As an embodiment, the RLC2 is for secondary link communication.

As an embodiment, the RLC1 is for the main link communication, that is, not for the secondary link communication.

As an embodiment, the RLC1 is for the primary cell group.

As an embodiment, the RLC1 is for a secondary cell group.

As an embodiment, the first PDCP entity is any PDCP entity of the first node.

As an embodiment, the first PDCP entity is the PDCP entity of the corresponding SRB of the first node.

As an embodiment, the first PDCP entity is the PDCP entity of the corresponding DRB of the first node.

As an embodiment, the RLC1 is for a specific path.

As an embodiment, the RLC2 is for a specific path.

As an embodiment, the first node determines whether to behave as the first type of UE based on the RLC entity associated with the first PDCP entity.

As an embodiment, when the protocol stack of FIG. 7 is used, the first node does not behave as the first type of UE.

Example 8

Embodiment 8 illustrates a schematic diagram of a direct path and an indirect path according to an embodiment of the present application, as shown in FIG8 .

The first node in Example 8 corresponds to the first node in this application.

As an embodiment, the second node in Embodiment 8 corresponds to the second node of the present application.

As an embodiment, the second node in Embodiment 8 is a cell group of the first node.

As an embodiment, the second node in Embodiment 8 is a primary cell of the first node.

As an embodiment, the second node in Embodiment 8 is the gNB corresponding to the primary cell group of the first node.

As an embodiment, the second node in Embodiment 8 is the PCell of the first node.

As an embodiment, the second node in Embodiment 8 is a transmission point of the primary cell group of the first node.

As an embodiment, the third node in Embodiment 8 is a relay node of the first node.

As an embodiment, the third node in Embodiment 8 is a U2N relay of the first node.

As an embodiment, the third node in Embodiment 8 is a relay between the first node and the network.

As an embodiment, the third node in Embodiment 8 is the L2 U2N relay UE.

As an embodiment, the third node in Embodiment 8 is a relay node between the first node and the second node.

As an embodiment, the third node in Embodiment 8 is an L2 U2N relay UE of the first node.

As an embodiment, the third node in Embodiment 8 corresponds to the first relay in Embodiment 6.

As an embodiment, the direct path is a manner or a transmission path in which the first node and the second node communicate with each other without going through the third node.

As an embodiment, the indirect path is a manner or a transmission path in which the first node and the second node communicate with each other through the third node.

As an embodiment, the arrowed lines in FIG. 8 represent logical channels.

As an embodiment, the line with an arrow in FIG. 8 represents an RLC bearer.

As an embodiment, the arrowed line in FIG. 8 represents a secondary link RLC channel.

As an embodiment, the thick line with an arrow in FIG. 8 represents a secondary link RLC channel.

As an example, the thick line with an arrow in FIG. 8 represents an indirect path.

As an example, the thin line with an arrow in FIG. 8 represents a direct path.

As an embodiment, the main link of the present application is a direct link between the first node and the second node, which is represented by a thin line in FIG8; the secondary link of the present application is a link between the first node and the third node, which is represented by a thick line in FIG8.

As an embodiment, the communication interface between the first node and the third node is a PC5 interface, and the first node and the third node communicate through a secondary link.

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

As an embodiment, the second node is a sender of the second signaling.

As an embodiment, the second node is the sender of the third signaling.

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

As an embodiment, the UE adopting the communication structure of FIG. 8 does not appear as the first type of UE.

Example 9

Embodiment 9 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application; as shown in FIG9. In FIG9, the processing device 900 in the first node includes a first receiver 901 and a first transmitter 902. In Embodiment 9,

A first receiver 901 receives a first signaling, wherein the first signaling is used to configure a SpCell (Special Cell); as a response to receiving the first signaling, a target operation set is executed, and whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE (User Equipment);

As an embodiment, the first node is a L2 U2N remote UE.

As an embodiment, the phrase said first signaling is used to configure the non-direct path including: configuring the SRAP (Sidelink Relay Adaptation Protocol) layer of the L2 U2N remote UE;

The first node does not appear to be a first-category UE.

As an embodiment, the first transmitter 902 sends a first measurement report; the first measurement report includes a measurement result of the L2 U2N relay UE of the first node;

The first node does not appear to be a first-category UE.

As an embodiment, the first receiver 901 receives a first notification message, where the first notification message is sent because a Uu RLF (radio link failure) occurs in the L2 U2N relay UE of the first node, or a synchronization reconfiguration occurs, or a cell reselection occurs, or an RRC connection reestablishment failure occurs, or an RRC connection continuation failure occurs;

Among them, the first node is in an RRC connected state, and whether the first notification message triggers RRC (radio resource control) connection reconstruction is related to whether the first node uses a direct path. When the first node uses a direct path, the first notification message does not trigger RRC connection reconstruction; when the first node does not use a direct path, the first notification message triggers RRC connection reconstruction.

As an embodiment, the first receiver 901 receives second signaling, where the second signaling is a system information block, and the second signaling is sent by broadcasting;

As an embodiment, the start condition of the third timer includes sending an RRC connection continuation request message; the stop condition of the third timer includes receiving an RRC connection continuation message; whether the third timer uses the first candidate value or the second candidate value is related to whether the first node behaves as a first type UE.

As an embodiment, the first receiver 901 receives a third signaling, where the third signaling is used to indicate entering an RRC inactive state; as a response to receiving the third signaling, the physical cell identity is replaced with a target identity; whether the target identity is the first identity or the second identity is related to whether the first node uses a direct path;

As an embodiment, the first type of UE is L2 U2N remote UE.

As an embodiment, the first node is a user equipment (UE).

As an embodiment, the first node is a terminal supporting a large delay difference.

As an embodiment, the first node is a terminal supporting NTN.

As an embodiment, the first node is an aircraft or a ship.

As an embodiment, the first node is a mobile phone or a vehicle-mounted terminal.

As an embodiment, the first node is a relay UE and/or a U2U remote UE.

As an embodiment, the first node is an Internet of Things terminal or an industrial Internet of Things terminal.

As an embodiment, the first node is a device supporting low-latency and high-reliability transmission.

As an embodiment, the first node is a secondary link communication node.

As an embodiment, the first receiver 901 includes at least one of the antenna 452, receiver 454, receiving processor 456, multi-antenna receiving processor 458, controller/processor 459, memory 460, or data source 467 in Example 4.

As an embodiment, the first transmitter 902 includes at least one of the antenna 452, transmitter 454, transmit processor 468, multi-antenna transmit processor 457, controller/processor 459, memory 460, or data source 467 in Embodiment 4.

Example 10

Embodiment 10 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application; as shown in FIG10. In FIG10, the processing device 1000 in the first node includes a first receiver 1001 and a first transmitter 1002. In Embodiment 10,

A first receiver 1001 receives a first signaling, wherein the first signaling is used to configure a SpCell (Special Cell); in response to receiving the first signaling, a target operation set is executed, wherein whether the target operation set includes the first operation set is related to whether the first node is a first-class UE (User Equipment);

Among them, the meaning of whether the target operation set includes the first operation set and whether the first node behaves as a first-class UE is: when the first node behaves as a first-class UE, the target operation set includes the first operation set only when the first node is configured with a direct path; when the first node does not behave as a first-class UE, the target operation set includes the first operation set; whether a non-direct path is used to determine whether the first node behaves as a first-class UE, when a non-direct path is used, the first node behaves as a first-class UE; when a direct path is used but not a non-direct path, the first node does not behave as a first-class UE; the direct path is through L2 (Layer-2) U2N (UE to Network) relay transmission information; the indirect path is not to transmit information through L2 U2N relay; the target operation set includes at least configuring a first timer; the first operation set includes configuring a second timer and N; the start condition of the first timer includes initiating RRC connection reconstruction, and the stop condition of the first timer includes selecting a suitable NR (New Radio) cell or selecting a suitable L2 U2N relay UE; the start condition of the second timer includes: detecting a problem with the physical layer of SpCell; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for SpCell.

As an embodiment, the first node is a L2 U2N remote UE.

The first node is a first type of UE.

As an embodiment, the first transmitter 1002 sends a first measurement report; the first measurement report includes a measurement result of the L2 U2N relay UE of the first node;

The first node is a first type of UE.

As an embodiment, the first receiver 1001 receives a first notification message, where the first notification message is sent because a Uu RLF (radio link failure) occurs in the L2 U2N relay UE of the first node, or a synchronization reconfiguration occurs, or a cell reselection occurs, or an RRC connection reestablishment failure occurs, or an RRC connection continuation failure occurs;

Among them, the first node is in an RRC connected state, and whether the first notification message triggers RRC (radio resource control) connection reconstruction is related to whether the first node behaves as the first type UE. When the first node does not behave as the first type UE, the first notification message does not trigger RRC connection reconstruction; when the first node behaves as the first type UE, the first notification message triggers RRC connection reconstruction.

As an embodiment, the first receiver 1001 receives second signaling, where the second signaling is a system information block, and the second signaling is sent by broadcasting;

As an embodiment, the first receiver 1001 receives a third signaling, where the third signaling is used to indicate entering an RRC inactive state; as a response to receiving the third signaling, the physical cell identity is replaced with a target identity; whether the target identity is the first identity or the second identity is related to whether the first node behaves as the first type of UE;

Among them, the first node is an L2 U2N remote node; the first identity is the physical cell identity of the cell that sends the third signaling; the second identity is the physical cell identity included in the discovery message of the L2 U2N relay UE of the first node; the sentence "whether the target identity is the first identity or the second identity is related to whether the first node behaves as the first type UE" means that: when the first node does not behave as the first type UE, the target identity is the first identity; when the first node behaves as the first type UE, the target identity is the second identity.

As an embodiment, the first type of UE is L2 U2N remote UE.

As an embodiment, the first node is a user equipment (UE).

As an embodiment, the first node is a terminal supporting NTN.

As an embodiment, the first node is an aircraft or a ship.

As an embodiment, the first node is a relay UE and/or a U2U remote UE.

As an embodiment, the first node is a secondary link communication node.

As an embodiment, the first receiver 1001 includes at least one of the antenna 452, receiver 454, receiving processor 456, multi-antenna receiving processor 458, controller/processor 459, memory 460, or data source 467 in Example 4.

As an embodiment, the first transmitter 1002 includes at least one of the antenna 452, transmitter 454, transmit processor 468, multi-antenna transmit processor 457, controller/processor 459, memory 460, or data source 467 in Embodiment 4.

A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or a CD. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software functional module. The present application is not limited to any specific form of combination of software and hardware. The user equipment, terminal and UE in the present application include but are not limited to drones, communication modules on drones, remote-controlled aircraft, aircraft, small aircraft, mobile phones, tablet computers, notebooks, vehicle-mounted communication equipment, wireless sensors, Internet cards, Internet of Things terminals, RFID terminals, NB-IoT terminals, MTC (Machine Type Communication) terminals, eMTC (enhanced MTC) terminals, Data cards, Internet access cards, vehicle-mounted communication equipment, low-cost mobile phones, low-cost tablet computers, satellite communication equipment, ship communication equipment, NTN user equipment and other wireless communication equipment. The base station or system equipment in this application includes but is not limited to macro cell base stations, micro cell base stations, home base stations, relay base stations, gNB (NR Node B) NR Node B, TRP (Transmitter Receiver Point, sending and receiving node), NTN base stations, satellite equipment, flight platform equipment and other wireless communication equipment.

The present invention may be implemented in other specified forms without departing from its core or essential features. Therefore, the embodiments disclosed herein should be considered as illustrative rather than restrictive in any way. The scope of the invention is determined by the appended claims rather than the preceding description, and all modifications within their equivalent meanings and regions are considered to be included therein.

Claims

A first node used for wireless communication, comprising:

a first receiver, receiving a first signaling, wherein the first signaling is used to configure a SpCell (Special Cell); in response to receiving the first signaling, executing a target operation set, wherein whether the target operation set includes the first operation set is related to whether the first node behaves as a first-class UE (User Equipment);

Among them, the meaning of whether the target operation set includes the first operation set and whether the first node behaves as a first-class UE is: when the first node behaves as a first-class UE, the target operation set does not include the first operation set; when the first node does not behave as a first-class UE, the target operation set includes the first operation set; whether a direct path is used to determine whether the first node behaves as a first-class UE, when only an indirect path is used, the first node behaves as a first-class UE; when both an indirect path and a direct path are used, the first node does not behave as a first-class UE; the direct path is through L2 (Layer-2) U2N (UE to Network, UE to Network) Relay transmission information; the non-direct path is not to transmit information through the L2 U2N relay; the target operation set includes at least configuring a first timer; the first operation set includes configuring a second timer and N; the start condition of the first timer includes initiating RRC connection reconstruction, and the stop condition of the first timer includes selecting a suitable NR (New Radio) cell or selecting a suitable L2 U2N relay UE; the start condition of the second timer includes: detecting a problem in the physical layer of the SpCell (Special Cell); the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for the SpCell; the first type of UE uses a non-direct path.
The first node according to claim 1, characterized in that it comprises:

The first node is a L2 U2N remote UE.
The first node according to claim 1 or 2, characterized in that

The phrase said first signaling is used to configure the non-direct path including: configuring the SRAP (Sidelink Relay Adaptation Protocol) layer of the L2 U2N remote UE;

The first node does not appear to be a first-category UE.
The first node according to any one of claims 1 to 3, characterized in that:

A first transmitter sends a first measurement report, wherein the first measurement report includes a measurement result of the L2 U2N relay UE of the first node;

The first node does not appear to be a first-category UE.
The first node according to any one of claims 1 to 4, characterized in that it comprises:

The first receiver receives a first notification message, where the first notification message is sent due to a Uu RLF (radio link failure) occurring in the L2 U2N relay UE of the first node, or a synchronization reconfiguration, or a cell reselection, or an RRC connection reestablishment failure, or an RRC connection continuation failure;

Among them, the first node is in an RRC connected state, and whether the first notification message triggers RRC (radio resource control) connection reconstruction is related to whether the first node uses a direct path. When the first node uses a direct path, the first notification message does not trigger RRC connection reconstruction; when the first node does not use a direct path, the first notification message triggers RRC connection reconstruction.
The first node according to any one of claims 1 to 5, characterized in that it comprises:

The first receiver receives a second signaling, where the second signaling is a system information block and the second signaling is sent by broadcasting;

The first signaling includes a first candidate value of the third timer; and the second signaling includes a second candidate value of the third timer.
The first node according to claim 6, characterized in that

The start condition of the third timer includes sending an RRC connection continuation request message; the stop condition of the third timer includes receiving an RRC connection continuation message; whether the third timer uses the first candidate value or the second candidate value is related to whether the first node behaves as a first type of UE.
The first node according to claim 6, characterized in that

The start condition of the third timer includes sending an RRC connection continuation request message; the stop condition of the third timer includes receiving an RRC connection continuation message;

Whether the third timer uses the first candidate value or the second candidate value is related to whether the RRC connection continuation request message uses a direct path or an indirect path.
The first node according to any one of claims 1 to 8, characterized in that it comprises:

The first receiver receives a third signaling, the third signaling being used to indicate entering an RRC inactive state; as a response to receiving the third signaling, replaces the physical cell identity with a target identity; whether the target identity is the first identity or the second identity is related to whether the first node uses a direct path;

Among them, the first node is an L2 U2N remote node; the first identity is the physical cell identity of the cell that sends the third signaling; the second identity is the physical cell identity included in the discovery message of the L2 U2N relay UE of the first node; the sentence "whether the target identity is the first identity or the second identity is related to whether the first node uses a direct path" means that: when the first node uses a direct path, the target identity is the first identity; when the first node does not use a direct path, the target identity is the second identity.
The first node according to any one of claims 1 to 9, characterized in that:

The first type of UE is L2 U2N remote UE.
The first node according to any one of claims 1 to 10, characterized in that:

The first node has only one cell group, namely, the master cell group (MCG).
The first node according to any one of claims 1 to 11, characterized in that:

Expiration of the first timer triggers the first node to enter the RRC idle state.
The first node according to any one of claims 1 to 12, characterized in that:

Expiration of the second timer is used to determine or trigger a radio link failure for the SpCell.
The first node according to any one of claims 1 to 13, characterized in that it comprises:

The first receiver receives a first notification message, where the first notification message is sent due to a Uu RLF (radio link failure) occurring in the L2 U2N relay UE of the first node, or a synchronization reconfiguration, or a cell reselection, or an RRC connection reestablishment failure, or an RRC connection continuation failure;

Among them, the sentence when the first node U01 behaves as the first type UE, the first notification message triggers RRC connection reconstruction; when the first node U01 does not behave as the first type UE, the first notification message does not trigger RRC connection reconstruction means: only when the first node U01 behaves as the first type UE, the first notification message triggers RRC connection reconstruction.
A method in a first node for wireless communication, comprising:

receiving a first signaling; the first signaling is used to configure the SpCell; in response to receiving the first signaling, executing a target operation set, wherein whether the target operation set includes the first operation set is related to whether the first node behaves as a first type of UE;

Among them, the sentence whether the target operation set includes the first operation set and whether the first node behaves as a first-class UE means that: when the first node behaves as a first-class UE, the target operation set does not include the first operation set; when the first node does not behave as a first-class UE, the target operation set includes the first operation set; whether a direct path is used to determine whether the first node behaves as a first-class UE, when only an indirect path is used, the first node behaves as a first-class UE; when both an indirect path and a direct path are used, the first node does not behave as a first-class UE; the direct path is to transmit information through an L2 U2N relay; the indirect path is not to transmit information through an L2 U2N relay; the target operation set includes at least configuring a first timer; the first operation set includes configuring a second timer and N; the start condition of the first timer includes initiating RRC connection reestablishment, and the stop condition of the first timer includes selecting a suitable NR cell or selecting a suitable L2 U2N relay UE; the start condition of the second timer includes: detecting a problem with the physical layer of the SpCell; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for the SpCell; the first-class UE uses an indirect path.