CN117917916A

CN117917916A - Method and apparatus for wireless communication

Info

Publication number: CN117917916A
Application number: CN202211293853.XA
Authority: CN
Inventors: 陈宇; 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2024-04-23
Also published as: WO2024083056A1

Abstract

A method and apparatus for wireless communication includes receiving first signaling and second signaling; the first signaling indicates a first set of candidate values for a first timer; the second signaling indicates a second candidate value for the first timer; the first set of candidate values includes at least one candidate value; transmitting a first message, starting the first timer with the transmission of the first message, wherein the value of the first timer is a target value; wherein the first message is an RRC message, the first message being used to request an RRC connection, the first message being used to determine whether the target value is a candidate in the first set of candidates or the second candidate, whether the first message is sent over a direct path or over an indirect path; the indirect path is through L2 relay transmission information; the direct path is not to relay information through L2U 2N. The application is helpful to improve the reliability of communication and avoid communication interruption through the first signaling.

Description

Method and apparatus for wireless communication

Technical Field

The present application relates to a transmission method and apparatus in a wireless communication system, and more particularly, to sidelink communication, relay communication, and multipath relay.

Background

Future wireless communication systems have more and more diversified application scenes, and different application scenes have different performance requirements on the system. To meet the different performance requirements of various application scenarios, a New air interface technology (NR) is decided to be researched in 3GPP (3 rd Generation Partner Project, third Generation partnership project) RAN (Radio Access Network ) #72 full-time, and a standardization Work for NR is started in 3GPP RAN #75 full-time with NR's WI (Work Item).

In Communication, both LTE (Long Term Evolution ) and 5GNR can be related to reliable accurate reception of information, optimized energy efficiency ratio, determination of information validity, flexible resource allocation, scalable system structure, efficient non-access layer information processing, lower service interruption and disconnection rate, low power consumption support, which is significant for normal Communication of base stations and user equipment, reasonable scheduling of resources, balancing of system load, so-called high throughput, meeting Communication requirements of various services, improving spectrum utilization, improving quality of service, whether eMBB (ehanced Mobile BroadBand), enhanced mobile broadband), URLLC (Ultra Reliable Low Latency Communication, ultra-high reliability low-latency Communication) or eMTC (ENHANCED MACHINE TYPE Communication ) is indispensable. Meanwhile, in the internet of things in the industrial field IIoT (Industrial Internet of Things), in V2X (vehicle to X) communication (Device to Device) between devices, in communication of unlicensed spectrum, in user communication quality monitoring, in network planning optimization, in NTN (Non Territerial Network, non-terrestrial network communication), in TN (TERRITERIAL NETWORK, terrestrial network communication), in dual connectivity (Dual connectivity) system, in radio resource management and codebook selection of multiple antennas, there is a wide demand in signaling design, neighbor management, service management, and beamforming, and the transmission modes of information are both broadcast and unicast, and are both indispensable for 5G system, because they are very helpful to meet the above demands.

With the increasing of the scene and complexity of the system, the system has higher requirements on reducing the interruption rate, reducing the time delay, enhancing the reliability, enhancing the stability of the system, and the flexibility of the service, and saving the power, and meanwhile, the compatibility among different versions of different systems needs to be considered in the system design.

The concepts, terms and abbreviations in the present application may refer to 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

Disclosure of Invention

In various communication scenarios, the use of relay may be involved, for example, when one UE (User Equipment) is at the cell edge and coverage is poor, the network may be accessed through the relay, and the relay node may be another UE. The relay mode mainly comprises layer 3 relay and layer 2 relay (L2U 2N relay), wherein network access service is provided for a remote node (U2N remote UE) through a relay node, the layer 3 relay is transparent to an access network, namely, the remote UE only establishes connection with a core network, and the access network cannot identify whether data come from the remote node or the relay node; while layer 2 relay, remote node (U2N remote UE) and access network (RAN) have RRC connection, the access network can manage the remote node, and radio bearers can be established between the access network and the remote node. The relay may be another UE, and in a system supporting layer 2 relay, the UE may communicate with the network through an L2 relay UE (L2U 2N relay UE), even if an indirect path (INDIRECT PATH) is used, or may communicate with the network directly without relay, even if a direct path (DIRECT PATH) is used. In some scenarios, one UE may use both the direct path and the indirect path to achieve better reliability and higher throughput. In general, the delay of using a direct path is smaller, while the delay of using an indirect path increases the delay of a remote UE because the relay needs to participate in the relay, and the relay may not establish an RRC connection when receiving a relay service request of the remote UE, and needs to establish a connection with a network before starting to transmit information of the remote UE. Therefore, regarding relay communication, one problem to be solved is how to configure the UE to control the RRC connection request procedure according to different situations.

The present application provides a solution to the above-mentioned problems.

It should be noted that, in the case of no conflict, the embodiments of any node of the present application and the features in the embodiments may be applied to any other node. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict. Meanwhile, the method provided by the application can also be used for solving other problems in communication.

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

Receiving a first signaling and a second signaling; the first signaling indicates a first set of candidate values for a first timer; the second signaling indicates a second candidate value for the first timer; the first set of candidate values includes at least one candidate value;

Transmitting a first message, starting the first timer with the transmission of the first message, wherein the value of the first timer is a target value;

wherein the first message is an RRC message, the first message being used to request an RRC connection, the first message being used to determine whether the target value is a candidate in the first set of candidates or the second candidate, whether the first message is sent over a direct path or over an indirect path; the indirect path is to relay transmission information through L2 (Layer-2) U2N (UE to Network); the direct path is not to relay transmission information through L2U 2N; the stop condition of the first timer includes receiving a response to the first message; expiration of the first timer is used to determine an RRC connection failure.

As one embodiment, the problems to be solved by the present application include: how to configure the timer in the RRC connection request according to different communication modes; how to control the RRC connection request process according to different communication modes; how to increase the flexibility of configuration; how to better support relay communication of different scenes; how to configure the timer; how to make different optimizations or configurations for direct and indirect paths.

As one example, the benefits of the above method include: the method comprises the steps of supporting UE which uses a direct path and an indirect path simultaneously and supporting various application scenes; the communication reliability is guaranteed, the communication flexibility is guaranteed, the complexity is reduced, the user experience is improved, the communication interruption is avoided, and the communication time delay is reduced.

Specifically, according to one aspect of the present application, the first message is transmitted using SRB 0; the sentence, whether the first message is sent over a direct path or over an indirect path, is used to determine whether the target value is a candidate in the first set of candidates or the meaning of the second candidate is: whether SRB0 is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate in the first candidate set or the second candidate.

In particular, according to one aspect of the application, the first signaling is unicast and the second signaling is broadcast; or both the first signaling and the second signaling are broadcast.

Specifically, according to one aspect of the present application, whether the target value is a candidate value in the first candidate value set or the second candidate value is independent of whether the first node appears as a first type UE when at least one of the first signaling and the second signaling is received; the first class of UEs transmit information using at least an indirect path.

In particular, according to one aspect of the application, whether the target value is a candidate value in the first set of candidate values or the second candidate value is independent of whether at least one of the first signaling and the second signaling is received over a direct path or over an indirect path.

Specifically, according to one aspect of the present application, the first signaling includes an RRC reconfiguration message; rlf-TimersAndConstants cells included in the first signaling indicate candidates in the first set of candidates; the second signaling includes a system message block 12 (SIB 12), the system message block 12 for configuring sidelink communications; the UE-TimersAndConstantsRemoteUE cell included in the second signaling indicates the second candidate value;

wherein the second candidate value is determined as the target value.

Specifically, according to one aspect of the present application, the first signaling includes a system message block 1; the system message block 1 comprises scheduling information of other system messages; the UE-TimersAndConstants cells included in the first signaling indicate candidates in the first set of candidates; the second signaling includes a system message block 12 (SIB 12), the system message block 12 for configuring sidelink communications; the UE-TimersAndConstantsRemoteUE cell included in the second signaling indicates the second candidate value;

wherein the second candidate value is determined as the target value.

Specifically, according to one aspect of the present application, the first signaling is used to configure a second timer and N; the starting conditions of the second timer include: detecting that a physical layer of the SpCell has a problem; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for SpCell;

Wherein the second timer is configured by the first signaling; the second candidate value is determined as the target value; the first signaling is unicast and the second signaling is broadcast.

Specifically, according to one aspect of the present application, the first candidate value set includes a first candidate value and a third candidate value, the first candidate value is for a direct path, and the third candidate value is for an indirect path; when the first message is sent over a direct path, the first candidate value is determined as the target value; the third candidate value is determined as the target value when the first message is sent over an indirect path.

In particular, according to one aspect of the application, the first node is a user equipment.

In particular, according to one aspect of the 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.

In particular, according to one aspect of the application, the first node is an aircraft.

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

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

A first receiver that receives a first signaling and a second signaling; the first signaling indicates a first set of candidate values for a first timer; the second signaling indicates a second candidate value for the first timer; the first set of candidate values includes at least one candidate value;

A first transmitter that transmits a first message, and starts the first timer with the transmission of the first message, the value of the first timer being a target value;

As an embodiment, the present application has the following advantages over the conventional scheme:

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

The complexity is lower and more flexible.

The RRC connection request is supported to be initiated through a direct path, the RRC connection request is supported to be initiated through an indirect path, and the RRC connection request process is more targeted.

The state at the time of receiving the signaling does not affect the signaling usage.

Drawings

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

FIG. 1 shows a flow chart for receiving first signaling, receiving second signaling, sending a first message, and starting a first timer according to one embodiment of the application;

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

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

FIG. 4 shows a schematic diagram of a first communication device and a second communication device according to one embodiment of the application;

fig. 5 shows a flow chart of wireless signal transmission according to an embodiment of the application;

FIG. 6 shows a flow diagram of a protocol stack according to one embodiment of the application;

FIG. 7 shows a schematic diagram of a protocol stack according to one embodiment of the application;

FIG. 8 shows a schematic diagram of a direct path versus a non-direct path according to one embodiment of the application;

FIG. 9 shows a schematic diagram of whether a first message is sent over a direct path or over an indirect path used to determine whether a target value is a candidate in a first set of candidates or a second candidate in accordance with an embodiment of the application;

Figure 10 shows a schematic diagram in which the expiration of a first timer is used to determine RRC connection failure according to one embodiment of the present application;

fig. 11 illustrates a schematic diagram of a processing device for use in a first node according to an embodiment of the application.

Description of the embodiments

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

Example 1

Embodiment 1 illustrates a flow chart for receiving first signaling, receiving second signaling, sending a first message, and starting a first timer according to one embodiment of the application, as shown in fig. 1. In fig. 1, each block represents a step, and it is emphasized that the order of the blocks in the drawing does not represent temporal relationships between the represented steps.

In embodiment 1, a first node in the present application receives first signaling in step 101; receiving a second signaling in step 102; transmitting a first message in step 103; a first timer is started in step 104.

Wherein the first signaling indicates a first set of candidate values for a first timer; the second signaling indicates a second candidate value for the first timer; the first set of candidate values includes at least one candidate value; the value of the first timer is a target value; the first message is an RRC message, the first message being used to request an RRC connection, whether the first message is sent over a direct path or over an indirect path is used to determine whether the target value is a candidate value in the first set of candidate values or the second candidate value; the indirect path is to relay transmission information through L2 (Layer-2) U2N (UE to Network); the direct path is not to relay transmission information through L2U 2N; the stop condition of the first timer includes receiving a response to the first message; expiration of the first timer is used to determine an RRC connection failure.

As an embodiment, the first timer is started with the transmission of the first message.

As an embodiment, the first message belongs to a first RRC connection request procedure, and initiating the first RRC connection request procedure includes starting the first timer.

As an embodiment, the sentence accompanying the sending of the first message, starting the meaning of the first timer includes: the first message belongs to a first RRC connection request procedure, and initiating the first RRC connection request procedure includes starting the first timer.

As an embodiment, the sending of the first message triggers the starting of the first timer.

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

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

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

As an embodiment, the serving cell refers to a cell in which the UE camps. Performing a cell search includes the UE searching for a suitable (subscriber) cell of the selected PLMN (Public land mobile Network ) or SNPN (Stand-alone Non-Public Network), selecting the suitable cell to provide available service, monitoring a control channel of the suitable cell, the process being defined as camping on the cell; that is, a camped cell, with respect to the UE, is the serving cell for the UE. Camping on one cell in RRC idle state or RRC inactive state has the following benefits: such that the UE may receive a system message from the PLMN or SNPN; after registration, if the UE wishes to establish an RRC connection or continue a suspended RRC connection, the UE may perform initial access on the control channel of the camping cell; the network may page to the UE; so that the UE can receive ETWS (Earthquake and Tsunami WARNING SYSTEM, earthquake tsunami warning system) and CMAS (Commercial Mobile ALERT SYSTEM ) notifications.

As an embodiment, for a UE in RRC connected state without CA/DC (carrier aggregation/dual connectivity ) configuration, only one serving cell includes the primary cell. For UEs in RRC connected state that are CA/DC (carrier aggregation/dual connectivity ) configured, the serving cell is used to indicate the set of cells including the special cell (SpCell, special Cell) and all the secondary cells. The primary cell (PRIMARY CELL) is an MCG (MASTER CELL Group) cell, operating on a primary frequency, on which the UE performs an initial connection establishment procedure or initiates connection re-establishment. For dual connectivity operation, a special cell refers to PCell (PRIMARY CELL ) of MCG or PSCell (PRIMARY SCG CELL ) of SCG (Secondary Cell Group); if not dual connectivity operation, the special cell is referred to as a PCell.

As an example, the frequency at which the SCell (Secondary Cell, slave Cell) operates is the slave frequency.

For one embodiment, the individual content of the information element is referred to as a field.

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

As an embodiment, in MR-DC, the radio access node providing the control plane connection to the core network is a master node, which may be a master eNB, a master ng-eNB, or a master gNB.

As an embodiment, MCG refers to a set of serving cells associated with a primary node, including SpCell, and optionally, one or more scells, in MR-DC.

As an example, PCell is SpCell of MCG.

As one example, PSCell is the SpCell of SCG.

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

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

As one embodiment, the access layer function that enables V2X (Vehicle-to-evaluation) communications defined in 3GPP standard TS23.285 is V2X sidelink communications (V2X sidelink communication), which occur between nearby UEs and which use E-UTRA technology but do not traverse (traversing) network nodes.

As one embodiment, at least the access layer function enabling V2X (Vehicle-to-evaluation) communications defined in 3GPP standard TS23.287 is NR sidelink communications (NR SIDELINK communications), which occur between two or more UEs in close proximity and which use NR technology but do not traverse (traversing) network nodes.

As one embodiment, a Sidelink (SL) is a direct communication link between UEs-to-UEs using sidelink resource allocation patterns, physical layer signals or channels, and physical layer procedures.

As an example, in the present application, the signaling name or domain name or message name beginning with "SL-" is for the sidelink.

As an example, not or not within or outside of the coverage is equal to the coverage.

As one embodiment, the in-coverage is equal to the in-coverage.

As an embodiment, the out-of-coverage is equal to the out-of-coverage.

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

As an embodiment, the direct path (DIRECT PATH) refers to a UE-to-network transmission path by which transmission means that data is sent between a remote UE of the UE-to-network (U2N) and the network without being relayed.

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

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

As a sub-embodiment of this embodiment, the data comprises a string or block of bits.

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

As an embodiment, the indirect path (INDIRECT PATH) refers to a UE-to-Network transmission path, through which data is transmitted, meaning that data is forwarded between a UE-to-Network (U2N) remote UE and a Network via a UE-to-Network (U2N) relay UE.

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

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

As one embodiment, a U2N relay UE refers to a UE that provides functionality to support the connection of a U2N remote UE to a network.

As one embodiment, a U2N remote UE refers to a UE that needs to communicate with a network via a U2N relay UE.

As one embodiment, a U2N remote UE refers to a UE that communicates with a network supporting relay services.

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

As an embodiment, when unicast service is sent and received with the network, both the U2N relay and the U2N remote node are in RRC connected state.

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

As one embodiment, not transmitting over a direct path includes transmitting over a relay.

As one embodiment, transmitting over a direct path is or includes transmitting without relaying.

As one embodiment, transmitting over the direct path is or includes forwarding without relaying.

As one embodiment, the U2N relay UE is a UE that provides U2N remote UE with a connectivity (connectivity) supported functionality (functionality) to the network.

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 relay services to the network for the U2N remote UE.

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

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

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

As an embodiment, the direct 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 one embodiment, the indirect (indirect) mode is a mode using the indirect path.

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

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

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

As an embodiment, PDCP entities corresponding to radio bearers terminated between the UE and the network are located within the UE and the network, respectively.

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

As an embodiment, the phrase using a direct path refers to that data carried by at least one SRB (SIGNALING RADIO BEARER ) between the UE and the network is not relayed or forwarded through other nodes.

As one embodiment, the phrase using a direct path refers to data carried by at least one RB (radio bearer) between the UE and the network not being relayed or forwarded by other nodes.

As one embodiment, the phrase using a direct path refers to RLC bearers associated with at least one SRB (SIGNALING RADIO BEARER ) between the UE and the network terminating at the UE and the network, respectively.

As an embodiment, the phrase using a direct path refers to the RLC entity associated with at least one SRB (SIGNALING RADIO BEARER ) between the UE and the network terminating at the UE and the network, respectively.

As an embodiment, the phrase using a direct path refers to that data carried by at least one DRB (Data radio bearer, signaling radio bearer) between the UE and the network is not relayed or forwarded through other nodes.

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

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

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

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

As one embodiment, the phrase using a direct path refers to a MAC layer where a Uu interface exists between a UE and a network, and the MAC layer of the Uu interface carries RRC signaling.

As one embodiment, the phrase using a direct path refers to a physical layer where a Uu interface exists between the UE and the network.

As one embodiment, the phrase using a direct path refers to the presence 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 channel or bearer used when transmitting over the indirect path.

For one embodiment, the phrase using indirect path transmission refers to the relay or forwarding of data carried by at least one RB (radio bearer) between the UE and the network through other nodes.

As an embodiment, the phrase using an indirect path refers to the relay or forwarding of data carried by at least one SRB (SIGNALING RADIO BEARER ) between the UE and the network via other nodes.

As one embodiment, the phrase using indirect path transfer refers to RLC bearers associated with at least one SRB (SIGNALING RADIO BEARER ) between the UE and the network terminating at the UE and other nodes, and the network, respectively.

As one embodiment, the phrase using an indirect path refers to the RLC entity associated with at least one SRB (SIGNALING RADIO BEARER ) between the UE and the network terminating at the UE and other nodes, other nodes and the network, respectively.

As an embodiment, the phrase using an indirect path refers to the relay or forwarding of data carried by at least one DRB (data radio bearer, signaling radio bearer) between the UE and the network via other nodes.

As one embodiment, the phrase using an indirect path refers to RLC bearers associated with at least one DRB (data radio bearer, signaling radio bearer) between the UE and the network terminating at the UE and other nodes, and the network, respectively.

As one embodiment, the phrase using an indirect path refers to the RLC entity associated with at least one DRB (data radio bearer, signaling radio bearer) between the UE and the network terminating at the UE and other nodes, other nodes and the network, respectively.

As an embodiment, the method proposed by the present application is also applicable to other L2 relays.

As an embodiment, the other node is another UE.

As an embodiment, the other node is an L2U 2N relay UE.

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

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

As an embodiment, the network comprises a Radio Access Network (RAN) and/or a serving cell and/or a base station.

As one embodiment, the UE may send physical layer signaling to the network when using the direct path; when using indirect path transmission, the UE cannot send or directly send physical layer signaling to the network;

As one embodiment, the UE may send a MAC CE to the network when using the direct path; when indirect path transmission is used, the UE cannot send or directly send MAC CEs to the network;

as an embodiment, when a direct path is used, no other protocol layer exists between the PDCP layer and the RLC layer of the first node; when 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 comprises a sidelink adaptation layer.

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

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

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

For one embodiment, the phrase using a direct path includes receiving using a direct path and/or transmitting using a direct path.

For one embodiment, the phrase using an indirect path includes receiving using an indirect path and/or transmitting using an indirect path.

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

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

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

As an embodiment, the relay in the present application refers to an L2U 2N 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, 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, i.e. a Master Cell Group (MCG).

As an embodiment, the first node in the present application is not configured as a Slave Cell Group (SCG).

As an embodiment, the first node in the present application is configured with a Slave Cell Group (SCG).

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

As an embodiment, the L2U 2N relay UE of the first node has the same PCell as the first node.

As an embodiment, the L2U 2N relay UE of the first node has a PCell different from the first node.

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

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

As an example, 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 comprises one or more RRC messages.

As an embodiment, the first signaling includes RRCReconfiguration messages.

As a sub-embodiment of this embodiment, the first signaling is unicast.

As an embodiment, the first signaling comprises at least part of a field of RRCReconfiguration messages.

As a sub-embodiment of this embodiment, the first signaling is unicast.

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

As a sub-embodiment of this embodiment, the first signaling is unicast.

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

As a sub-embodiment of this embodiment, the first signaling is unicast.

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

As a sub-embodiment of this embodiment, the first signaling is unicast.

As an embodiment, the first signaling includes a cell for configuring directpath or INDIRECTPATH.

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

As an embodiment, the receiving of the first signaling is performed.

As one embodiment, the sentence in response to receiving the first signaling, performing the meaning of the set of target operations includes: the performing of the first signaling includes performing the set of target operations.

As one embodiment, the phrase that the first signaling is used to configure the SpCell includes configuring rlf related timers.

As one embodiment, the phrase that the first signaling is used to configure the SpCell includes configuring rlf related constants.

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

As one embodiment, the phrase that the first signaling is used to configure the SpCell includes configuring a low mobility assessment.

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

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

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

As an embodiment, the first signaling is used to configure PDSCH (physical downlink SHARED CHANNEL ).

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

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

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

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

As an embodiment, the first signaling is used to configure a beam or a spatial parameter.

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

As an embodiment, the first signaling comprises an RRC reconfiguration message.

As a sub-embodiment of this embodiment, the second candidate value is determined as the target value.

As a sub-embodiment of this embodiment, the first candidate value is for a direct path.

As a sub-embodiment of this embodiment, the first candidate value is not indirect path specific.

As a sub-embodiment of this embodiment, the first candidate value is not remote UE specific.

As an embodiment, the third cell comprised by the first signaling indicates a candidate value of the first set of candidate values.

As a sub-embodiment of this embodiment, the third cell is rlf-TimersAndConstants.

As a sub-embodiment of this embodiment, the third cell comprises each candidate value of the first set of candidate values.

As an embodiment, each candidate value of the first set of candidate values is indicated by the first signaling.

As an embodiment, the first node uses the candidate value of the first timer indicated by the second signaling, and ignores the candidate value of the first timer indicated by the first signaling.

As a sub-embodiment of this embodiment, the second signaling is SIB12 and the first signaling is RRCReconfiguration messages.

As an embodiment, the above embodiment has the advantage that one broadcasted system message covers a unicast dedicated channel transmitted message, which may increase flexibility and optimize the performance of using indirect path transmission.

As an embodiment, the first signaling is or includes a system message block.

As an embodiment, the first signaling is or includes a system message block 1 (SIB 1).

As an embodiment, the first signaling comprises information about evaluating whether a UE is allowed to access a cell.

As an embodiment, the first signaling defines scheduling of other system information.

As an embodiment, the first signaling includes radio resource configuration information common to all UEs.

As an embodiment, the first signaling comprises blocking information for unified access control.

As an embodiment, the first signaling comprises cell selection information.

As an embodiment, the first signaling includes a first cell indicating a candidate value in the first set of candidate values.

As a sub-embodiment of this embodiment, the first cell UE-TimersAndConstants cells.

As an embodiment, the second signaling is or includes a system message block 12 (SIB 12), the system message block 12 being used to configure sidelink communications.

As an embodiment, the second signaling includes a second cell indicating the second candidate value.

As a sub-embodiment of this embodiment, the second cell is UE-TimersAndConstantsRemoteUE.

As an embodiment, the benefit of the above embodiment is that SIB12 covering SIB1 may increase flexibility, optimizing performance using indirect path transmission.

As a sub-embodiment of this embodiment, the first candidate value set comprises only the first candidate value.

As an embodiment, the first timer is any one timer in the first set of timers.

As one embodiment, the first set of timers includes T319 timers.

As one embodiment, the first set of timers includes a T301 timer.

As one embodiment, the first set of timers includes a T300 timer.

As an embodiment, the first candidate value and the second candidate value are both candidates for the first timer.

As an embodiment, each candidate value in the first set of candidate values and the second candidate value are candidate values for the first timer.

As an embodiment, the first cell comprises the first candidate set of values.

As an embodiment, the first set of candidate values comprises only the first candidate value.

As an embodiment, the first set of candidate values comprises candidate values other than the first candidate value.

As an embodiment, the first message is sent either over a direct path or over an indirect path.

As an embodiment, the first message may be sent over a direct path and over an indirect path simultaneously.

As an embodiment, the first set of candidate values comprises more than 1 candidate value.

As a sub-embodiment of this embodiment, the first set of candidate values comprises candidate values for a direct path and for an indirect path.

As a sub-embodiment of this embodiment, the first set of candidate values comprises candidate values for the remote node and not for the remote node.

As a sub-embodiment of this embodiment, the first set of candidate values comprises candidate values for the remote node and for nodes other than the remote node.

As a sub-embodiment of this embodiment, the first set of candidate values comprises a common candidate value for the remote node.

As a sub-embodiment of this embodiment, the first set of candidate values comprises candidate values for remote nodes and for nodes not of a particular type.

As a sub-embodiment of this embodiment, a direct path is considered to be used when the first message is sent over both the direct path and over the indirect path.

As a sub-embodiment of this embodiment, an indirect path is considered to be used when the first message is sent over both the direct path and the indirect path.

As a sub-embodiment of this embodiment, the first set of candidate values comprises only 2 candidate values.

As an embodiment, the first signaling is used to configure an indirect path.

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

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

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

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

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: the first signaling configures relay UEs associated with indirect paths.

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

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: a T420 timer is configured.

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: the RLC channel is configured.

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

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: the first signaling includes sl-RemoteUE-ConfigCommon.

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: the first signaling includes SL-RemoteUE-Config.

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: the first signaling includes SL-RLC-ChannelConfig.

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: the first signaling includes SL-SRAP-Config.

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: the first signaling includes SL-RLC-ChannelConfigPC.

As an embodiment, the meaning that the sentence said first signaling is used to configure the indirect path comprises: the first signaling includes sl-PHY-MAC-RLC-Config.

As an embodiment, the first signaling comprises the first set of candidate values.

As an embodiment, the second signaling comprises the second candidate value.

As one embodiment, the meaning of the first candidate set of phrase first timer includes: any one of the first set of candidate values may be determined to be the value of the first timer.

As one embodiment, the meaning of the first candidate set of phrase first timer includes: any candidate value in the first set of candidate values may be determined as the value of the first timer.

As one embodiment, the meaning of the first candidate set of phrase first timer includes: there is a case where one candidate value of the first candidate value set is determined as the value of the first timer.

As one embodiment, the meaning of the first candidate set of phrase first timer includes: there is a case where any one candidate value in the first candidate value set is determined as the value of the first timer.

As one embodiment, the meaning of the first candidate set of phrase first timer includes: the value of the first timer is from the first candidate set of values.

As one embodiment, the meaning of the second candidate value of the phrase first timer includes: the second candidate value may be determined as the value of the first timer.

As one embodiment, the meaning of the second candidate value of the phrase first timer includes: the presence of the second candidate value is determined as the value of the first timer.

As one embodiment, the meaning of the second candidate value of the phrase first timer includes: the value of the first timer may be from the second candidate value.

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

As one embodiment, any candidate value in the first set of candidate values is different from the second candidate value.

As an embodiment, at least one candidate value of the first set of candidate values is different from the second candidate value.

As an embodiment, whether a candidate value in the first set of candidate values is identical to the second candidate value depends on implementation.

As an embodiment, the meaning of the phrase value of the first timer includes: an expiration value of the first timer.

As an embodiment, the meaning of the phrase value of the first timer includes: the expiration time of the first timer.

As an embodiment, the meaning of the phrase value of the first timer includes: in the case where the first timer is not stopped after the start of the first timer, the first timer expires as determined by the value of the first timer after the start of the first timer.

As an embodiment, the unit of any one candidate value in the first set of timers is milliseconds.

As an embodiment, the first node is an L2U 2N remote node.

As an embodiment, the first node is not an L2U 2N remote node.

As an embodiment, the first node is an L2U 2N remote node when sending the first message.

As an embodiment, the first node is not an L2U 2N remote node when sending the first message.

As an embodiment, the first node is represented by an L2U 2N remote node.

As an embodiment, the first node does not appear as an L2U 2N remote node.

As an embodiment, the first node is presented as an L2U 2N remote node when sending the first message.

As an embodiment, the first node does not appear as an L2U 2N remote node when sending the first message.

As one embodiment, the phrase that the first message is used to request an RRC connection includes: the first message is used to request establishment of an RRC connection.

As one embodiment, the phrase that the first message is used to request an RRC connection includes: the first message is used to request reestablishment of the RRC connection.

As one embodiment, the phrase that the first message is used to request an RRC connection includes: the first message is used to request to continue the RRC connection.

As an embodiment, the first message is an upstream message.

As an embodiment, the first message is sent via SRB 0.

As an embodiment, the size of the first message is fixed.

As an embodiment, the size of the first message comprises 56 bits.

As an embodiment, the first message is or includes RRCSetupRequest.

As a sub-embodiment of this embodiment, the response of the first message is or comprises: RRCSetup.

As a sub-embodiment of this embodiment, the response of the first message is or comprises: RRCRELEASE.

As a sub-embodiment of this embodiment, the response of the first message is or comprises: RRCReject.

As an embodiment, the first message is or includes RRCResumeRequest.

As a sub-embodiment of this embodiment, the response of the first message is or comprises: RRCResume.

As an embodiment, the first message is or includes RRCResumeRequest.

As an embodiment, the first message is or includes RRCReestablishmentRequest.

As a sub-embodiment of this embodiment, the response of the first message is or comprises: RRCReestablishment.

As an embodiment, the first message comprises an identity of the first node.

As an embodiment, the response of the first message refers to RRC signaling.

As an embodiment, the response of the first message is used to establish or restore an RRC connection.

As an embodiment, the response of the first message is used to configure an RRC connection.

As an embodiment, the response of the first message is used to confirm an RRC connection.

As an embodiment, the first signaling is unicast and the second signaling is broadcast.

As an embodiment, both the first signaling and the second signaling are broadcast.

As one embodiment, the first message is transmitted using SRB0 (SIGNALING RADIO BEARER 0 ).

As an embodiment, the sentence, the first message is used to request an RRC connection, whether the first message is sent over a direct path or over an indirect path is used to determine whether the target value is a candidate value in the first set of candidate values or the meaning of the second candidate value is: whether SRB0 is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate in the first candidate set or the second candidate.

As one embodiment, whether SRB0 is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate in the first candidate set or the second candidate.

As one embodiment, when the first message is sent, SRB0 is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate in the first candidate set or the second candidate.

As one embodiment, whether SRB0 is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate in the first set of candidates or whether the second candidate is used to determine whether the first message is sent over a direct path or over an indirect path is used to determine whether the target value is a candidate in the first set of candidates or the second candidate.

As an embodiment, when the first message is sent, whether SRB is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate value in the first candidate value set or the second candidate value.

As an embodiment, whether SRB is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate in the first set of candidate values or the second candidate value is used to determine whether the first message is sent over a direct path or an indirect path is used to determine whether the target value is a candidate in the first set of candidate values or the second candidate value.

As one embodiment, the first node determines whether SRB and/or SRB0 is mapped to a direct path or to an indirect path.

As one embodiment, the network indicates whether SRB and/or SRB0 maps to a direct path or to an indirect path.

As an embodiment, the first signaling is used to indicate whether SRB0 is mapped to a direct path or to an indirect path.

As an embodiment, the second signaling is used to indicate whether SRB0 maps to a direct path or to an indirect path.

As one example, the meaning of the phrase SRB0 mapped to a direct path includes that SRB0 uses a direct path.

As one example, the meaning that the phrase SRB0 maps to an indirect path includes that SRB0 uses an indirect path.

As an embodiment, whether the target value is a candidate value in the first set of candidate values or the second candidate value is independent of whether at least one of the first signaling and the second signaling is received over a direct path or over an indirect path.

As an embodiment, the sentence whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning independent of whether at least one of the first signaling and the second signaling is received over a direct path or over an indirect path is or includes: whether the target value is a candidate value in the first set of candidate values or the second candidate value is independent of whether the first signaling is received over a direct path or an indirect path.

As an embodiment, the sentence whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning independent of whether at least one of the first signaling and the second signaling is received over a direct path or over an indirect path is or includes: whether the target value is a candidate value in the first set of candidate values or the second candidate value is independent of whether the second signaling is received over a direct path or an indirect path.

As an embodiment, the sentence whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning independent of whether at least one of the first signaling and the second signaling is received over a direct path or over an indirect path is or includes: the first signaling is received over a direct path or an indirect path, independent of whether the target value is a candidate value in the first set of candidate values or the second candidate value.

As an embodiment, the sentence whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning independent of whether at least one of the first signaling and the second signaling is received over a direct path or over an indirect path is or includes: the second signaling is received over a direct path or an indirect path, independent of whether the target value is a candidate value in the first set of candidate values or the second candidate value.

As an embodiment, the sentence whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning independent of whether at least one of the first signaling and the second signaling is received over a direct path or over an indirect path is or includes: whether the target value is a candidate value in the first set of candidate values or the second candidate value is independent of whether the first signaling and the second signaling are received over a direct path or an indirect path.

As an embodiment, the meaning of the phrase independent of whether said first signaling is received via a direct path or via an indirect path comprises: whether the first signaling is sent over a direct path or an indirect path does not affect whether the target value is a candidate value in the first set of candidate values or the second candidate value.

As an embodiment, the meaning of the phrase independent of whether said first signaling is received via a direct path or via an indirect path comprises: the target value may be either a candidate value in the first set of candidate values or the second candidate value, whether the first signaling is sent over a direct path or over an indirect path.

As an embodiment, the meaning of the phrase independent of whether said second signaling is received via a direct path or via an indirect path comprises: whether the second signaling is sent over a direct path or an indirect path does not affect whether the target value is a candidate value in the first set of candidate values or the second candidate value.

As an embodiment, the meaning of the phrase independent of whether said second signaling is received via a direct path or via an indirect path comprises: the target value may be a candidate value in the first candidate value set or the second candidate value, whether the second signaling is sent over a direct path or over an indirect path.

As an embodiment, the meaning of the phrase independent of whether the first signaling and the second signaling are received via a direct path or via an indirect path comprises: independent of whether the first signaling is received over a direct path or an indirect path, and independent of whether the second signaling is received over a direct path or an indirect path.

As an embodiment, whether the target value is a candidate value of the first set of candidate values or the second candidate value is independent of whether the first node appears as a UE of the first type when at least one of the first signaling and the second signaling is received.

As an embodiment, the first type UE transmits information using at least an indirect path.

As an embodiment, whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning irrelevant to whether the first node appears as a UE of the first type when at least one of the first signaling and the second signaling is received, comprises: whether the first node appears as a first class of UEs when the first signaling is received does not affect whether the target value is a candidate in the first set of candidates or the second candidate.

As an embodiment, whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning irrelevant to whether the first node appears as a UE of the first type when at least one of the first signaling and the second signaling is received, comprises: whether the first node appears as a first type UE when the second signaling is received does not affect whether the target value is a candidate in the first set of candidates or the second candidate.

As an embodiment, whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning irrelevant to whether the first node appears as a UE of the first type when at least one of the first signaling and the second signaling is received, comprises: whether the first node appears as a first type UE when the first signaling is received does not affect whether the target value is a candidate in the first set of candidates or the second candidate, and whether the first node appears as a first type UE when the second signaling is received does not affect whether the target value is a candidate in the first set of candidates or the second candidate.

As an embodiment, whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning irrelevant to whether the first node appears as a UE of the first type when at least one of the first signaling and the second signaling is received, comprises: the target value may be a candidate value of the first set of candidate values or the second candidate value, whether the first node appears as a first class of UE when the first signaling is received.

As an embodiment, whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning irrelevant to whether the first node appears as a UE of the first type when at least one of the first signaling and the second signaling is received, comprises: the target value may be a candidate value of the first set of candidate values or the second candidate value, whether the first node appears as a first class of UE when the second signaling is received.

As an embodiment, whether the target value is a candidate value in the first candidate value set or the second candidate value, the meaning irrelevant to whether the first node appears as a UE of the first type when at least one of the first signaling and the second signaling is received, comprises: whether the first node appears as a first type of UE when at least one of the first signaling and the second signaling is received is independent of whether the target value is a candidate in the first set of candidates or the second candidate.

As an embodiment, the first type UE is an L2U 2N remote UE.

As one embodiment, the first type of UE is an L2U 2N remote UE that uses only indirect paths.

As an embodiment, the phrase meaning that the UE of the first class uses an indirect path includes: the first class of UEs uses at least an indirect path.

As an embodiment, the phrase meaning that the UE of the first class uses an indirect path includes: the first class of UEs uses an indirect path as well as a direct path.

As one embodiment, the phrase meaning expressed (actingas) for a first type of UE includes: following the behaviour of the first class of UEs.

As one embodiment, the meaning of the phrase expressed as a first type of UE includes: and executing the first signaling according to the operation required to be executed by the first type UE when executing the first signaling.

As one embodiment, the meaning of the phrase expressed as a first type of UE includes: the set of target operations is performed while the first signaling is performed.

As one embodiment, the meaning of the phrase expressed as a first type of UE includes: an indirect path is used.

As one embodiment, the meaning of the phrase expressed as a first type of UE includes: only the indirect path is used.

As one embodiment, the meaning of the phrase expressed as a first type of UE includes: is an L2U 2N remote UE.

As one embodiment, the meaning of the phrase expressed as a first type of UE includes: signaling for configuring the indirect path is performed.

As one embodiment, the meaning of the phrase expressed as a first type of UE includes: signaling for configuring the L2U 2N remote UE is performed.

As one embodiment, the meaning of the phrase expressed as a first type of UE includes: consider own L2U 2N remote UE.

As an embodiment, the meaning of the phrase that the first node appears as a UE of the first type includes: the first node appears as an L2U 2N remote UE.

As an embodiment, the meaning of the phrase that the first node appears as a UE of the first type includes: the first node appears as an L2U 2N remote UE and uses only indirect paths.

As an embodiment, the meaning of the phrase that the first node appears as a UE of the first type includes: the first node appears as an L2U 2N remote UE and is configured with only an indirect path.

As an embodiment, the meaning of the phrase that the first node appears as a UE of the first type includes: the first node appears as an L2U 2N remote UE and does not use a direct path.

As an embodiment, the meaning of the phrase that the first node appears as a UE of the first type includes: the first node appears as an L2U 2N remote UE and is not configured with a direct path.

As an embodiment, the meaning of the phrase that the first node appears as a UE of the first type includes: the first node appears as an L2U 2N remote UE using only indirect paths.

As an embodiment, the meaning of the phrase that the first node appears as a UE of the first type includes: the first node appears as an L2U 2N remote UE configured with only indirect paths.

As an embodiment, the first node represents a UE of a first type meaning or comprising: the first node appears as an L2U 2N remote UE.

As an embodiment, the phrase that the first node behaves as an L2U 2N remote UE means or includes: the first node uses only indirect paths.

As an embodiment, the phrase that the first node behaves as an L2U 2N remote UE means or includes: the first node is configured with only indirect paths.

As an embodiment, the phrase that the first node behaves as an L2U 2N 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 L2U 2N remote UE means or includes: the first node is not configured with a direct path.

As one example, the phrase using only indirect paths means that: no direct path is used.

As one example, the phrase using only indirect paths means that: the direct path is not configured.

As one example, the phrase using only indirect paths means that: no direct path is supported or cannot be used.

As one example, the meaning of a phrase that uses both indirect and direct paths includes: both indirect and direct paths are configured.

As one example, the meaning of a phrase that uses both indirect and direct paths includes: either indirect or direct paths may be used.

As one example, the meaning of a phrase that uses both indirect and direct paths includes: in the course of communication, either an indirect path or a direct path may be used.

As one example, the meaning of a phrase that uses both indirect and direct paths includes: in one communication, either an indirect path or a direct path may be used.

As one example, the meaning of a phrase that uses both indirect and direct paths includes: at least one RB is used or associated with a non-direct path, and at least one RB is used or associated with a direct path.

As one example, the meaning of a phrase that uses both indirect and direct paths includes: while transmitting data using the direct path and the indirect path.

As one example, the meaning of a phrase that uses both indirect and direct paths includes: the same data is transmitted using both the direct path and the indirect path.

As one embodiment, the phrase relay transmission information includes transmission signaling and/or data.

As one embodiment, the target signaling is used to configure the second timer and N; the starting conditions of the second timer include: detecting that a physical layer of the SpCell has a problem; the stop condition of the second timer includes: n consecutive synchronization indications are received from a lower layer for SpCell.

As an embodiment, the target signaling is the first signaling.

As an embodiment, the target signaling is signaling other than the first signaling.

As a sub-embodiment of this embodiment, the target signaling is third signaling.

As a sub-embodiment of this embodiment, the third signaling is RRC signaling.

As a sub-embodiment of this embodiment, the target signaling is unicast and the second signaling is broadcast.

As an embodiment, the second timer is configured by the target signaling.

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

As one embodiment, the N is a positive integer.

As an embodiment, the meaning of configuration N is the value of configuration N.

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

As an embodiment, the first node may communicate normally with the network only if it has an RRC connection.

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

As one embodiment, a radio link failure trigger occurs to initiate RRC connection reestablishment.

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

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

As one embodiment, initiating RRC connection reestablishment includes selecting an appropriate L2U 2N relay UE to send the RRC connection reestablishment request message.

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

As one embodiment, initiating RRC connection reestablishment includes a MAC reset.

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

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

As an embodiment, the suitable cells include suitable NR cells.

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

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

As an embodiment, when a suitable L2U 2N relay UE is selected, the first node sends an RRC connection reestablishment request through an indirect path.

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

As an embodiment, the suitable L2U 2N relay UE is an L2U 2N relay UE that meets a certain channel quality.

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

As an embodiment, the first timer is a T301 timer.

As one embodiment, the first timer is a T319 timer.

As one embodiment, the first timer is a T300 timer.

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

As an embodiment, the second timer is MCG-specific.

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

As an embodiment, the physical layer of the SpCell is a physical layer of the first node for measuring SpCell signals.

As one embodiment, the phrase detecting that the physical layer of the SpCell is problematic 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 one embodiment, the phrase detecting that the physical layer of the SpCell is problematic includes: the physical layer of the first node reports that the measurement result on the reference signal resource for monitoring the radio link quality of the SpCell is worse than a certain threshold.

As one embodiment, the phrase detecting that the physical layer of the SpCell is problematic includes: n1 consecutive out-of-sync (out-of-sync) indications are received from lower layers for SpCell.

As an embodiment, the target signaling indicates the N1.

As one embodiment, N1 is a positive integer.

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

As an embodiment, the N311 domain of the target signaling indicates the N.

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

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

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

As an embodiment, the consecutive out-of-sync indications refer to the N1 out-of-sync indications not interspersed with synchronization (in-sync) indications for the physical layer of the SpCell.

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

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

As one embodiment, the meaning of the phrase receiving N consecutive synchronization indications from a lower layer for SpCell includes: the physical layer of the first node sends a synchronization (in-sync) indication to the RRC layer of the first node according to the measurement result on the reference signal resource for monitoring the radio link quality of the SpCell being better than a specific threshold.

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

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

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 meaning of the first node expressed as the first type UE includes: the first node uses both an indirect path and a direct path, and the indirect path is a specific path.

As an embodiment, the meaning that the first node does not appear as the first type 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 appear as the first type UE includes: the first node appears as an L2U 2N remote UE and is configured with a direct path.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node appears as an L2U 2N remote UE and uses a direct path.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node appears as an L2U 2N remote UE and uses multipath.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node appears as an L2U 2N remote UE and is configured with multipath.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node appears as an L2U 2N remote UE configured with a direct path.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node appears as an L2U 2N remote UE using a direct path.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node appears as an L2U 2N remote UE using multipath.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node appears as a multipath configured L2U 2N remote UE.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node does not appear as an L2U 2N remote UE configured with only indirect paths.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node does not appear to be an L2U 2N remote UE using only a direct path.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node does not appear as an L2U 2N remote UE.

As a sub-embodiment of this embodiment, the first node is an L2U 2N remote UE.

As an embodiment, the meaning that the first node does not appear as the first type UE includes: the first node does not satisfy the condition that appears as a first type of UE.

As one embodiment, the particular path is a non-direct path and a main path of the direct path.

As one embodiment, the particular path is an indirect path and a path of the direct path where the control plane is configured.

As one example, a particular path is used for a path that transmits or associates with SRB 1.

As one embodiment, the particular path is preconfigured.

As one example, a particular path is specified.

As an embodiment, the first node is an L2U 2N remote UE.

As an embodiment, the meaning that the first node is an L2U 2N remote UE includes: the first node selects one L2U 2N relay UE.

As an embodiment, the meaning that the first node is an L2U 2N remote UE includes: the first node establishes a connection for relay with an L2U 2N relay UE.

As an embodiment, the meaning that the first node is an L2U 2N remote UE includes: the first node communicates with a network through an L2U 2N relay UE.

As an embodiment, the meaning that the first node is an L2U 2N remote UE includes: the first node uses a relay service of an L2U 2N relay UE.

As an embodiment, the meaning that the first node is an L2U 2N remote UE includes: the first node communicates with a network through a U2N relay UE.

As an embodiment, the meaning that the first node is an L2U 2N remote UE includes: the manner in which the first node communicates with the network includes relaying the UE through the U2N.

As one embodiment, the phrase that the first signaling is used to configure the indirect path includes: configuring an SRAP (SIDELINK RELAY Adaptation Protocol, sidelink relay adaptation layer protocol) layer of the L2U 2N remote UE;

wherein the first node does not appear as a first type of UE.

As one embodiment, the meaning of the phrase configuring the SRAP layer of the L2U 2N remote UE includes: and configuring an SRAP layer of the first node.

As one embodiment, the meaning of the phrase configuring the SRAP layer of the L2U 2N remote UE includes: the first signaling includes SL-SRAP-Config.

As one embodiment, the meaning of the phrase configuring the SRAP layer of the L2U 2N remote UE includes: the RLC channel is configured.

As one embodiment, the meaning of the phrase configuring the SRAP layer of the L2U 2N remote UE includes: an RLC channel is configured for communication with the network.

As one embodiment, the meaning of the phrase configuring the SRAP layer of the L2U 2N remote UE includes: the RLC channel of the PC5 interface is configured.

As one embodiment, the first set of candidate values includes a first candidate value and a third candidate value, the first candidate value being for a direct path and the third candidate value being for a non-direct path.

As a sub-embodiment of this embodiment, the first signaling is unicast; the second signaling is broadcast.

As an embodiment, the first message is sent over a direct path or over an indirect path, which is used to determine the target value.

As one embodiment, the first candidate value is determined as the target value when the first message is sent over a direct path; the third candidate value is determined as the target value when the first message is sent over an indirect path.

As an embodiment, the second candidate value is for an indirect path.

As an embodiment, the second candidate value is for an L2U 2N far end UE.

As an embodiment, the second candidate value is for a UE that appears as an L2U 2N remote UE.

As one embodiment, the first set of candidate values includes a first candidate value and a third candidate value, the first candidate value being for a direct path and the third candidate value being for a non-direct path; when the first message is sent over a direct path, the first candidate value is determined as the target value; the third candidate value is determined as the target value when the first message is sent over an indirect path.

As a sub-embodiment of this embodiment, the first signaling is unicast.

As a sub-embodiment of this embodiment, the second signaling is broadcast.

As a sub-embodiment of this embodiment, the second candidate value is for an indirect path.

As an embodiment, the meaning that the phrase the first candidate value is for a direct path is or includes: the first candidate is not directed to an indirect path.

As an embodiment, the meaning that the phrase the first candidate value is for a direct path is or includes: the first candidate is not for a sidelink.

As an embodiment, the meaning that the phrase the first candidate value is for a direct path is or includes: the first candidate value is not for an L2U 2N remote node.

As an embodiment, the meaning that the phrase the first candidate value is for a direct path is or includes: the first candidate value is not for a node that appears as an L2U 2N far-end node.

As an embodiment, the meaning that the phrase the first candidate value is for a direct path is or includes: the first candidate value is for all UEs.

As an embodiment, the meaning that the phrase the first candidate value is for a direct path is or includes: the first candidate value is not UE-specific.

As an embodiment, the phrase that the third candidate value is for an indirect path means or includes: the third candidate value is for a UE using an indirect path.

As an embodiment, the phrase that the third candidate value is for an indirect path means or includes: the third candidate value is for an L2U 2N far-end UE.

As an embodiment, the phrase that the third candidate value is for an indirect path means or includes: the third candidate value is for a UE that appears as an L2U 2N remote UE.

As an embodiment, the phrase that the third candidate value is for an indirect path means or includes: the third candidate is for sidelink communication.

As an embodiment, the second signaling is not used to configure the second timer.

As an embodiment, the first signaling is used to configure a third timer, which is T311.

As an embodiment, the third signaling is used to configure a third timer, which is T311.

Example 2

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

Fig. 2 illustrates a diagram of a network architecture 200 of a 5gnr, LTE (Long-Term Evolution) and LTE-a (Long-Term Evolution Advanced, enhanced Long-Term Evolution) system. The 5GNR or LTE network architecture 200 may be referred to as 5GS (5G System)/EPS (Evolved PACKET SYSTEM) 200, or some other suitable terminology. The 5GS/EPS200 may include one or more UEs (User Equipment) 201, ng-RAN (next generation radio access network) 202,5GC (5G Core Network)/EPC (Evolved Packet Core, evolved packet core) 210, hss (Home Subscriber Server )/UDM (Unified DATA MANAGEMENT) 220, and internet service 230. The 5GS/EPS may interconnect 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 disclosure may be extended to networks providing circuit switched services or other cellular networks. The NG-RAN includes NR node bs (gnbs) 203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gNB203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a Basic Service Set (BSS), an Extended Service Set (ESS), a TRP (transmit receive node), or some other suitable terminology. The gNB203 provides the UE201 with an access point to the 5GC/EPC210. Examples of UE201 include a cellular telephone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a non-terrestrial base station communication, a satellite mobile communication, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, an drone, an aircraft, a narrowband internet of things device, a machine-type communication device, a land-based vehicle, an automobile, a wearable device, or any other similar functional device. Those of skill in the art may also refer to the UE201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. gNB203 is connected to 5GC/EPC210 through an S1/NG interface. The 5GC/EPC210 includes MME (Mobility MANAGEMENT ENTITY )/AMF (Authentication MANAGEMENT FIELD, authentication management domain)/SMF (Session Management Function ) 211, other MME/AMF/SMF214, S-GW (SERVICE GATEWAY, serving Gateway)/UPF (User Plane Function), 212, and P-GW (PACKET DATE Network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC210. In general, the MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet Protocal, internet protocol) packets are transported through the S-GW/UPF212, which S-GW/UPF212 itself is connected to the P-GW/UPF213. The P-GW provides UEIP address allocation as well as other functions. The P-GW/UPF213 is connected to the internet service 230. Internet services 230 include operator-corresponding internet protocol services, which may include, in particular, the internet, intranets, 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 the gNB203.

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

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

As an embodiment, the UE201 supports relay transmission.

As an embodiment, the UE201 includes a mobile phone.

As one example, the UE201 is a vehicle including an automobile.

As an embodiment, the gNB203 is a macro cell (MarcoCellular) base station.

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

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

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

As one embodiment, the gNB203 is a satellite device.

Example 3

Embodiment 3 shows a schematic diagram of an embodiment of a radio protocol architecture of a user plane and a control plane according to the application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, fig. 3 shows the radio protocol architecture for the control plane 300 for a first node (UE, satellite or aerial in gNB or NTN) and a second node (gNB, satellite or aerial in UE or NTN), or between two UEs, in three layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY301. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the links 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, radio link layer control protocol) 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 ciphering the data packets and handover support for the first node between second nodes. 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 the various radio resources (e.g., resource blocks) in one cell among 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 (PC 5SIGNALING PROTOCOL ) sublayer 307 is responsible for the processing of 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 for the physical layer 351, PDCP sublayer 354 in the L2 layer 355, RLC sublayer 353 in the L2 layer 355 and MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. Also included in the L2 layer 355 in the user plane 350 is an SDAP (SERVICE DATA Adaptation Protocol ) sublayer 356, the SDAP sublayer 356 being responsible for mapping between QoS flows and data radio bearers (DRBs, data Radio Bearer) to support diversity of traffic. SRBs can be regarded as services or interfaces provided by the PDCP layer to higher layers, e.g., RRC layer. In the NR system, SRBs include SRB1, SRB2, and SRB3, and also SRB4 when the sidelink communication is involved, which are used to transmit different types of control signaling, respectively. SRB is a bearer between the UE and the access network for transmitting control signaling including RRC signaling between the UE and the access network. SRB1 is of particular interest for UEs, where after each UE establishes an RRC connection, there is SRB1 for transmitting RRC signaling, most of the signaling is transmitted through SRB1, and if SRB1 is interrupted or unavailable, the UE must perform RRC reestablishment. SRB2 is typically used only for transmitting NAS signaling or security related signaling. The UE may not configure SRB3. In addition to 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. Further included are a network layer (e.g., IP layer) terminating at the P-GW on the network side and an application layer terminating at the other end of the connection (e.g., remote UE, server, etc.). For UEs involving relay services, the control plane may also include an adaptation sublayer SRAP (SIDELINK RELAY Adaptation Protocol, sidelink relay adaptation may be) 308, and the user plane may also include an adaptation sublayer SRAP358, the introduction of which may facilitate multiplexing and/or distinguishing data from multiple source UEs by lower layers, such as the MAC layer, e.g., the RLC layer. For nodes not involved in relay communications, PC5-S307, SRAP308, SRAP358 are not required in the course of the communication.

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

As an embodiment, the radio 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 the RRCC306.

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

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

As an embodiment, the first message 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 application, as shown in fig. 4. Fig. 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

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

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

In the transmission from the second communication device 410 to the first communication device 450, upper layer data packets from the core network are provided to a controller/processor 475 at the second communication device 410. 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, a controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller/processor 475 is also responsible for retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., physical layer). Transmit processor 416 performs coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal clusters based on various modulation schemes, e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM). The multi-antenna transmit processor 471 digitally space-precodes the coded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. A transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate a physical channel carrying the time domain multicarrier symbol stream. The multi-antenna transmit processor 471 then performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multiple antenna transmit processor 471 to a radio frequency stream and then provides it to a different antenna 420.

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

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

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

As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus of the first communication device 450 to at least: receiving a first signaling and a second signaling; the first signaling indicates a first set of candidate values for a first timer; the second signaling indicates a second candidate value for the first timer; the first set of candidate values includes at least one candidate value; transmitting a first message, starting the first timer with the transmission of the first message, wherein the value of the first timer is a target value; wherein the first message is an RRC message, the first message being used to request an RRC connection, the first message being used to determine whether the target value is a candidate in the first set of candidates or the second candidate, whether the first message is sent over a direct path or over an indirect path; the indirect path is to relay transmission information through L2 (Layer-2) U2N (UE to Network); the direct path is not to relay transmission information through L2U 2N; the stop condition of the first timer includes receiving a response to the first message; expiration of the first timer is used to determine an RRC connection failure.

As an embodiment, the first communication device 450 includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: receiving a first signaling and a second signaling; the first signaling indicates a first set of candidate values for a first timer; the second signaling indicates a second candidate value for the first timer; the first set of candidate values includes at least one candidate value; transmitting a first message, starting the first timer with the transmission of the first message, wherein the value of the first timer is a target value; wherein the first message is an RRC message, the first message being used to request an RRC connection, the first message being used to determine whether the target value is a candidate in the first set of candidates or the second candidate, whether the first message is sent over a direct path or over an indirect path; the indirect path is to relay transmission information through L2 (Layer-2) U2N (UE to Network); the direct path is not to relay transmission information through L2U 2N; the stop condition of the first timer includes receiving a response to the first message; expiration of the first timer is used to determine an RRC connection failure.

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

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

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

As an embodiment, the first communication device 450 is an in-vehicle 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 an in-vehicle 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 example, a receiver 454 (including an antenna 452), a receive processor 456 and a controller/processor 459 are used in the present application to receive the first signaling.

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

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

As one example, a transmitter 454 (including an antenna 452), a transmit processor 468 and a controller/processor 459 are used in the present application to transmit the first message.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow diagram according to one embodiment of the application, as shown in fig. 5. In fig. 5, U01 corresponds to the first node of the present application, and it is specifically illustrated that the order in this example does not limit the signal transmission order and the order of implementation in the present application, where the steps in F51 are optional.

For the first node U01, receiving a first signaling in step S5101; receiving a second signaling in step S5102; receiving a third signaling in step S5103; the first message is sent in step S5104.

For the second node U02, sending a first signaling in step S5201; transmitting a second signaling in step S5202; transmitting a third signaling in step S5203; the first message is received in step S5204.

In embodiment 5, the first signaling indicates a first set of candidate values for a first timer; the second signaling indicates a second candidate value for the first timer; the first set of candidate values includes at least one candidate value; the first node U01 starts the first timer with the transmission of the first message, and the value of the first timer is a target value; wherein the first message is an RRC message, the first message being used to request an RRC connection, the first message being used to determine whether the target value is a candidate in the first set of candidates or the second candidate, whether the first message is sent over a direct path or over an indirect path; the indirect path is to relay transmission information through L2 (Layer-2) U2N (UE to Network); the direct path is not to relay transmission information through L2U 2N; the stop condition of the first timer includes receiving a response to the first message; expiration of the first timer is used to determine an RRC connection failure.

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 a PCell of the first node U01.

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

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

As an embodiment, the first signaling is forwarded by 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 an indirect path.

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

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

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

As one embodiment, the first signaling includes a measurement configuration associated with the first measurement report.

As an embodiment, the first signaling comprises 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 comprises a measurement report configuration, the first measurement report being generated according to the measurement report configuration indicated by the first signaling.

As an embodiment, the measurement configuration comprises reference signal resources for which measurements are made.

As an embodiment, the measurement configuration comprises a relay UE for which the measurements are intended.

As an embodiment, the first signaling and the second signaling have no fixed order of precedence.

As an example, step S5101 is earlier than step S5102.

As an example, step S5101 is not earlier than step S5102.

As an example, step S5101 is later than step S5102.

As an embodiment, the receiving of the second signaling is independent of the first signaling.

As an embodiment, the receiving of the second signaling is dependent on the first signaling.

As an embodiment, the application or execution of the second signaling depends on the first signaling.

As an embodiment, the first signaling indicates the second signaling.

As an embodiment, the first signaling includes scheduling information of the second signaling.

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

As an embodiment, the second signaling is SIB.

As one embodiment, the second signaling is SIB12.

As an embodiment, when the first signaling is sent, the first node U01 is in an RRC idle state.

As an embodiment, when the first signaling is sent, the first node U01 is in an RRC inactive state.

As an embodiment, when the first signaling is sent, the SRB other than SRB0 of the first node U01 is suspended.

As an embodiment, when the first signaling is sent, the first node U01 does not have a radio link failure.

As an embodiment, when the first signaling is sent, the SRB other than SRB0 of the first node U01 is not suspended.

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

As an embodiment, when the second signaling is sent, the first node U01 is in an RRC idle state.

As an embodiment, when the second signaling is sent, the first node U01 is in an RRC inactive state.

As an embodiment, when the second signaling is sent, the SRB other than SRB0 of the first node U01 is suspended.

As an embodiment, when the second signaling is sent, the first node U01 does not have a radio link failure.

As an embodiment, when the second signaling is sent, the SRB other than SRB0 of the first node U01 is not suspended.

As an embodiment, when the second signaling is sent, the first node U01 is in an RRC connected state.

As an embodiment, the first signaling is sent aperiodically.

As an embodiment, the first signaling is sent periodically.

As an embodiment, the second signaling is sent periodically.

As an embodiment, when the first signaling uses an indirect path, the first signaling is forwarded from the first node U01 to the second node U02 via a relay.

As an embodiment, when the first signaling uses an indirect path, the second signaling is forwarded from the first node U01 to the second node U02 via a relay.

As an embodiment, when the first signaling uses an indirect path, the third signaling is forwarded from the first node U01 to the second node U02 via a relay.

As an embodiment, the third signaling uses a direct path.

As an embodiment, the third signaling uses an indirect path.

As an embodiment, the third signaling uses a direct path and an indirect path.

As an example, step S5104 is later than step S5101.

As an example, step S5104 is later than step S5102.

As an example, step S5104 is later than step S5103.

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

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

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

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

As an embodiment, before step S5104, the first node U01 detects a radio link failure.

As an embodiment, the first node U01 has an L2U 2N relay UE.

As an embodiment, the L2U 2N relay UE of the first node U01 periodically transmits a discovery message.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 is a PC5-S message.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 is a NAS message of a PC5 interface.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 is for discovery by a U2N remote UE.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 is used to discover a U2N remote UE.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 indicates an identity of the L2U 2N relay UE.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 indicates a serving cell of the L2U 2N relay UE.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 indicates a physical cell identity of a serving cell of the L2U 2N relay UE.

As one embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 indicates whether the L2U 2N relay UE provides a relay service.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 indicates a relay service code of the L2U 2N relay UE.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 indicates a PLMN (Public Land Mobile Network ) of the L2U 2N relay UE.

As an embodiment, the discovery message sent by the L2U 2N relay UE of the first node U01 is sent through SRB 4.

As an embodiment, the first signaling uses encryption.

As an embodiment, the first signaling uses integrity protection.

As an embodiment, the second signaling uses encryption.

As an embodiment, the second signaling uses integrity protection.

As an embodiment, the third signaling uses encryption.

As an embodiment, the third signaling uses integrity protection.

As an embodiment, the first signaling does not use encryption.

As an embodiment, the first signaling does not use integrity protection.

As an embodiment, the second signaling does not use encryption.

As an embodiment, the second signaling does not use integrity protection.

Example 6

Embodiment 6 illustrates a schematic diagram of a protocol stack according to one embodiment of the application, as shown in fig. 6.

FIG. 6 shows two sub-graphs (a) and (b).

The protocol stack shown in fig. 6 is applicable to L2U 2N relay communication, and embodiment 6 is based on embodiment 3.

Fig. 6 (a) corresponds to a protocol stack when indirect path communication is used; fig. 6 (b) corresponds to the protocol stack when direct path communication is used.

The prefix "Uu-" in fig. 6 indicates a protocol that is a Uu interface; the prefix "PC5-" indicates a protocol that is a PC5 interface.

As an example, the first relay in fig. 6 is a relay when the first node uses an indirect path.

As one embodiment, the first relay is an L2U 2N relay UE communicating between the first node and MCG.

As an embodiment, the second node in fig. 6 is a PCell or a gcb corresponding to the PCell of the first node.

As an embodiment, the second node in fig. 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 a gNB to which the first node is connected.

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

As an example, the second node in fig. 6 has an RRC connection with the first node.

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

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

As an embodiment, the first relay is a U2N relay UE, and the first relay provides an L2U 2N relay service to the first node before performing the first signaling.

As an embodiment, the first relay is a U2N relay UE, the first relay does not provide the first node with an L2U 2N relay service before performing the first signaling, and the first node uses the U2N relay service provided by the first relay after receiving the first signaling or the second signaling or the third signaling.

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

As an embodiment, the protocol entity { Uu-SRAP, uu-RLC, uu-MAC, uu-PHY } of the Uu interface terminates at said first relay and second node.

As an embodiment, in (a), the protocol entity { Uu-PDCP } of the Uu interface ends with the first node and the second node, and the PDCP pdu of the first node uses forwarding of 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 example, 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, uu-SDAP is further over Uu-PDCP; for the control plane of the first node, there is also a Uu-RRC layer above Uu-PDCP.

As an example, uu-SDAP corresponds to SDAP356 in fig. 3, uu-PDCP corresponds to PDCP354 in fig. 3; uu-RRC corresponds to RRC306 in fig. 3.

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

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

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 one embodiment, the communication between the first node and the second node uses an indirect path.

As one embodiment, the communication between the first node and the second node uses a direct path.

As one embodiment, 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 transparent to the first medium and then to the second medium.

As an embodiment, the transmission of the first signaling is applicable to fig. 6 (c) without using the first relay.

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, the Uu-PDCP of the first node is associated with PC5-RLC, or with PC5-RLC through PC5-SRAP, when using an indirect path.

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

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

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

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

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

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

As an embodiment, (b) in fig. 6 is a protocol stack when the first node and the third node communicate when no relay is used.

As an embodiment, (b) in fig. 6 is a protocol stack when a direct path is used, when the first node communicates with the third node.

As an embodiment, when the first node communicates with the network using both the direct path and the indirect path, the first node uses both the protocol stack shown in (a) and the protocol stack shown in (b).

As a sub-embodiment of this embodiment, the protocol stacks shown in (a) and (b) are applied to the same RB.

As an embodiment, the primary path is a link when the first node and the third node employ (b) communication.

As an embodiment, the primary path is a link when the first node and the second node employ (a) communication.

As an embodiment, the specific path is a link when the first node and the third node adopt (b) communication.

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

As an embodiment, the third node in fig. 6 is a PCell or a gcb corresponding to the PCell of the first node.

As an embodiment, the third node in fig. 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 a gNB to which the first node is connected.

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

As an example, the third node in fig. 6 is a network node.

As an example, the third node in fig. 6 has an RRC connection with the first node.

As an example, 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 a sub-embodiment of this embodiment, the second node and the third node belong to the same cell group.

As an embodiment, the second node has a communication interface with the third node.

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

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

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

As an embodiment, only UEs using the protocol stack (a) appear as said first type of UEs.

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

Example 7

Embodiment 7 illustrates a schematic diagram of a protocol stack according to one embodiment of the application, as shown in fig. 7.

Embodiment 7 further illustrates a protocol stack when the first node uses both a direct path and an indirect path on the basis of embodiment 3. In fig. 7, a first PDCP entity of the first node associates two RLC entities, RLC1 and RLC2.

As an embodiment, each RLC entity associated with the first PDCP entity is associated with a different MAC, namely RLC1 is associated with MAC1 and RLC2 is associated with MAC 2.

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

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

As an example, fig. 7 is applicable to SRBs including SRB 1.

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

As an example, the protocol structure shown in fig. 7 is a split SRB, i.e., split SRB.

As an example, the protocol structure shown in fig. 7 is a split DRB, i.e., split DRB.

As an example, fig. 7 is adapted for transmission.

As an example, fig. 7 is adapted for reception.

As an example, the first protocol entity in fig. 7 is RRC, and fig. 7 is for SRBs including SRB 1.

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

As an embodiment, PDCP PDUs in which RRC messages are formed by the processing of the PDCP entity are transmitted through RLC 1.

As an embodiment, PDCP PDUs in which RRC messages are formed by the processing of the PDCP entity are transmitted through RLC 2.

As an embodiment, PDCP PDUs in which the RRC message is formed through the processing of the PDCP entity are transmitted through RLC1 or RLC 2.

As an embodiment, the RRC message is duplicated through the PDCP entity's processing to form a PDCP pdu, which is transmitted through RLC1 and RLC2 at the same time.

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

As an embodiment, the primary path of the SRB1 is for RLC 1.

As an embodiment, the primary path of the SRB1 is for RLC 2.

As an embodiment, the RLC2 is for sidelink communication.

As an embodiment, the RLC1 is for primary link communication, i.e. not for secondary link communication.

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

As an embodiment, the RLC1 is for a 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 a PDCP entity of a corresponding SRB of the first node.

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

As an embodiment, the RLC1 is path specific.

As an embodiment, the RLC2 is path specific.

As an embodiment, the specific path is a main path.

As an embodiment, SRB1 of the first node uses only a direct path.

As an embodiment, the SRB1 of the first node uses only the direct path as the main path.

As an embodiment, for SRB1, RLC2 entity corresponds to the primary path.

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

As an example, the first node does not appear as the first type UE when using the protocol stack of fig. 7.

As an embodiment, the first node uses multi-path (MP).

Example 8

Embodiment 8 illustrates a schematic diagram of a direct path and a non-direct path according to one embodiment of the application, as shown in fig. 8.

The first node in embodiment 8 corresponds to the first node of the present 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 a gNB corresponding to a master cell group of the first node.

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

As an embodiment, the second node in embodiment 8 is a transmitting 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 one L2U 2N 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 L2U 2N 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 do not communicate through the third node.

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

As an example, the arrowed lines in fig. 8 represent logical channels.

As an example, the arrowed line in fig. 8 represents an RLC bearer.

As an example, the arrowed line in fig. 8 represents a sidelink RLC channel.

As an example, the bold arrowed line in fig. 8 represents the sidelink RLC channel.

As an example, the bold arrowed line in fig. 8 represents an indirect path.

As an example, the arrowed thin lines in FIG. 8 represent direct paths.

As an example, the primary link of the present application is a direct link between the first node and the second node, represented by thin lines in fig. 8; the sidelink of the present application is a link between said first node and said third node, indicated by a bold line in fig. 8.

As an embodiment, the communication interface between the first node and the third node is a PC5 interface, the first node and the third node communicating via a sidelink.

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

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

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

As an embodiment, the UE employing the communication structure of fig. 8 appears as the first type of UE.

Example 9

Embodiment 9 illustrates a schematic diagram of whether a first message is sent over a direct path or over an indirect path used to determine whether a target value is a candidate in a first candidate set or a second candidate, as shown in fig. 9, according to one embodiment of the application.

As an embodiment, during operation of the first timer, no cell reselection occurs by the first node.

As an embodiment, during the running of the first timer, no relay reselection occurs by the first node.

As an embodiment, the target value is either a candidate value of the first set of candidate values or the second candidate value.

As one embodiment, whether the sentence first message is sent over a direct path or over an indirect path is used to determine whether the target value is a candidate in the first set of candidates or the meaning of the second candidate includes: whether the first message is sent over a direct path or an indirect path is used to determine whether the target value is one of the candidate values comprised by the first set of candidate values or the second candidate value.

As an embodiment, the first candidate set includes only one candidate, and determining whether the first sentence message is sent through the direct path or through the indirect path is used to determine whether the target value is a candidate in the first candidate set or a meaning of the second candidate includes: whether the first message is sent over a direct path or an indirect path is used to determine whether the target value is the one candidate value or the second candidate value comprised by the first set of candidate values.

As an embodiment, the first candidate set includes more than one candidate, and determining whether the first sentence message is sent via the direct path or via the indirect path is used to determine whether the target value is a candidate in the first candidate set or a meaning of the second candidate includes: whether the first message is sent over a direct path or an indirect path is used to determine whether the target value is a candidate value comprised by the first set of candidate values or the second candidate value.

As an embodiment, the first candidate set includes more than one candidate, and determining whether the first sentence message is sent via the direct path or via the indirect path is used to determine whether the target value is a candidate in the first candidate set or a meaning of the second candidate includes: whether the first message is sent over a direct path or an indirect path is used to determine which candidate value the target value is comprised by the first set of candidate values.

As one embodiment, candidates in the first candidate set of values at the target value when the first message is sent over a direct path; and when the first message is sent through an indirect path, a candidate value in the second candidate values is used for the target value.

As a sub-embodiment of this embodiment, the first set of candidate values comprises only one candidate value.

As a sub-embodiment of this embodiment, the first set of candidate values comprises more than one candidate value, the first set of candidate values comprises only one candidate value associated with a direct path, and the target value is the one candidate value associated with a direct path comprised by the first set of candidate values.

As a sub-embodiment of this embodiment, the first candidate set comprises more than one candidate, the first candidate set comprises only one candidate suitable for all UEs, and the target value is the one candidate suitable for all UEs comprised by the first candidate set.

As a sub-embodiment of this embodiment, the first set of candidate values comprises more than one candidate value, the first set of candidate values comprises only one candidate value for the indirect path and the target value is the one candidate value for the indirect path comprised by the first set of candidate values.

As a sub-embodiment of this embodiment, the first candidate set comprises more than one candidate value, the first candidate set comprises only one candidate value for a non-remote UE, and the target value is the one candidate value for the non-remote UE comprised by the first candidate set.

As a sub-embodiment of this embodiment, the target value is any candidate value of the first set of candidate values.

As a sub-embodiment of this embodiment, the first node determines a candidate value from the first set of candidate values as the target value by itself.

As an embodiment, the first set of candidate values comprises at least a first candidate value and a third candidate value, the target value being a candidate value in the first set of candidate values, whether the first message is sent over a direct path or over an indirect path.

As a sub-embodiment of this embodiment, the first candidate value and the third candidate value are for a direct path and an indirect path, respectively, the target value being the first candidate value when the first message is sent over the direct path; the target value is the third candidate value when the first message is sent over an indirect path.

As a sub-embodiment of this embodiment, the first candidate value and the third candidate value are for all UEs and for remote UEs, respectively, the target value being the first candidate value when the first message is sent over a direct path; the target value is the third candidate value when the first message is sent over an indirect path.

As a sub-embodiment of this embodiment, the first candidate value is not specified to be for an indirect path, the third candidate value is for an indirect path, and the target value is the first candidate value when the first message is sent over a direct path; the target value is the third candidate value when the first message is sent over an indirect path.

As a sub-embodiment of this embodiment, the first candidate value is not specified for a UE of a particular type, the third candidate value is for a remote UE, and the target value is the first candidate value when the first message is sent over a direct path; the target value is the third candidate value when the first message is sent over an indirect path.

Example 10

Embodiment 10 illustrates a schematic diagram in which expiration of a first timer is used to determine an RRC connection failure according to one embodiment of the present application, as shown in fig. 10.

As one embodiment, expiration of the first timer is used to determine that the first message failed to request an RRC connection.

As an embodiment, expiration of the first timer is used to determine that the first message was unsuccessful.

As one embodiment, the expiration of the sentence first timer is used to determine the meaning of the RRC connection failure includes: expiration of the first timer is considered to be a failure to establish an RRC connection, or to be a failure to continue an RRC connection, or to be a failure to reestablish an RRC connection.

As one embodiment, the expiration of the sentence first timer is used to determine the meaning of the RRC connection failure includes: the cause of failure is entered into the RRC connected state by one name.

As an embodiment, the first timer is related to an RRC establishment request procedure.

As a sub-embodiment of this embodiment, the expiration of the sentence first timer is used to determine the meaning of the RRC connection failure includes: the higher layer is informed about the RRC connection establishment failure.

As a sub-embodiment of this embodiment, the higher layer comprises NAS.

As a sub-embodiment of this embodiment, the meaning of the first timer related to the RRC establishment request procedure includes: the first timer is started along with the transmission of the RRC establishment request.

As a sub-embodiment of this embodiment, the first timer is T300.

As a sub-embodiment of this embodiment, the expiration of the sentence first timer is used to determine the meaning of the RRC connection failure includes: information is recorded in a state variable whose name includes fail.

As a sub-embodiment of this embodiment, the expiration of the sentence first timer is used to determine the meaning of the RRC connection failure includes: a variable that records the number of connection failures is added to 1.

As a sub-embodiment of this embodiment, the variable that records the number of connection failures is numberOfConnFail.

As an embodiment, the first timer is related to an RRC continue (resume) request procedure.

As a sub-embodiment of this embodiment, the meaning of the first timer related to the RRC continue request procedure includes: the first timer is started with the transmission of the RRC continue request.

As a sub-embodiment of this embodiment, the first timer is T319.

As a sub-embodiment of this embodiment, the expiration of the sentence first timer is used to determine the meaning of the RRC connection failure includes: the RRC idle state is entered by the cause (cause) of the RRC continued failure.

As a sub-embodiment of this embodiment, the expiration of the sentence first timer is used to determine the meaning of the RRC connection failure includes: failing to enter the RRC connected state.

As an embodiment, the first timer is related to an RRC reestablishment request procedure.

As a sub-embodiment of this embodiment, the meaning of the first timer related to the RRC reestablishment request procedure includes: the first timer is started along with the transmission of the RRC reestablishment request.

As a sub-embodiment of this embodiment, the first timer is T301.

As a sub-embodiment of this embodiment, the expiration of the sentence first timer is used to determine the meaning of the RRC connection failure includes: and entering an RRC idle state by taking the RRC connection failure as a release reason.

Example 11

Embodiment 11 illustrates a block diagram of a processing apparatus for use in a first node according to one embodiment of the application; as shown in fig. 11. In fig. 11, the processing means 1100 in the first node comprises a first receiver 1101 and a first transmitter 1102. In the case of the embodiment of the present application in which the sample is a solid,

A first receiver 1101 that receives the first signaling and the second signaling; the first signaling indicates a first set of candidate values for a first timer; the second signaling indicates a second candidate value for the first timer; the first set of candidate values includes at least one candidate value;

A first transmitter 1102 that transmits a first message, and starts the first timer with the transmission of the first message, wherein the value of the first timer is a target value;

Wherein the first message is an RRC message, the first message being used to request an RRC connection, the first message being used to determine whether the target value is a candidate in the first set of candidates or the second candidate, whether the first message is sent over a direct path or over an indirect path; the indirect path is to relay transmission information through L2 (Layer-2) U2N (UE-to-network); the direct path is not to relay transmission information through L2U 2N; the stop condition of the first timer includes receiving a response to the first message; expiration of the first timer is used to determine an RRC connection failure.

As one embodiment, the first message is transmitted using SRB0 (SIGNALING RADIO BEARER0 ); the sentence, whether the first message is sent over a direct path or over an indirect path, is used to determine whether the target value is a candidate in the first set of candidates or the meaning of the second candidate is: whether SRB0 is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate in the first candidate set or the second candidate.

As one embodiment, the first signaling is unicast and the second signaling is broadcast; or both the first signaling and the second signaling are broadcast.

As an embodiment, whether the target value is a candidate value in the first set of candidate values or the second candidate value is independent of whether the first node appears as a UE of a first type when at least one of the first signaling and the second signaling is received; the first class of UEs transmit information using at least an indirect path.

As an embodiment, the first signaling comprises an RRC reconfiguration message; rlf-TimersAndConstants cells included in the first signaling indicate candidates in the first set of candidates; the second signaling includes a system message block 12 (SIB 12), the system message block 12 for configuring sidelink communications; the UE-TimersAndConstantsRemoteUE cell included in the second signaling indicates the second candidate value;

wherein the second candidate value is determined as the target value.

As an embodiment, the first signaling comprises a system message block 1; the system message block 1 comprises scheduling information of other system messages; the UE-TimersAndConstants cells included in the first signaling indicate candidates in the first set of candidates; the second signaling includes a system message block 12 (SIB 12), the system message block 12 for configuring sidelink communications; the UE-TimersAndConstantsRemoteUE cell included in the second signaling indicates the second candidate value;

wherein the second candidate value is determined as the target value.

As an embodiment, the first signaling is used to configure a second timer and N; the starting conditions of the second timer include: detecting that a physical layer of the SpCell has a problem; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for SpCell;

As an embodiment, the first type UE is an L2U 2N 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 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 transmissions.

As an embodiment, the first node is a sidelink communication node.

As an example, the first receiver 1101 includes at least one of the antenna 452, the receiver 454, the receive processor 456, the multi-antenna receive processor 458, the controller/processor 459, the memory 460, or the data source 467 in example 4.

As an example, the first transmitter 1102 may include at least one of the antenna 452, the transmitter 454, the transmit processor 468, the multi-antenna transmit processor 457, the controller/processor 459, the memory 460, or the data source 467 of example 4.

Those of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described methods may be implemented by a program that instructs associated hardware, and the program may be stored on a computer readable storage medium, such as a read-only memory, a hard disk or an optical disk. Alternatively, all or part of the steps of the above embodiments may be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment may be implemented in a hardware form or may be implemented in a software functional module form, and the present application is not limited to any specific combination of software and hardware. The user equipment, terminal and UE in the present application include, but are not limited to, unmanned aerial vehicles, communication modules on unmanned aerial vehicles, remote control airplanes, aircrafts, mini-planes, mobile phones, tablet computers, notebooks, vehicle-mounted Communication devices, wireless sensors, network cards, internet of things terminals, RFID terminals, NB-IoT terminals, MTC (MACHINE TYPE Communication) terminals, eMTC (ENHANCED MTC ) terminals, data cards, network cards, vehicle-mounted Communication devices, low cost mobile phones, low cost tablet computers, satellite Communication devices, ship Communication devices, NTN user devices, and other wireless Communication devices. The base station or system equipment in the present application includes, but is not limited to, wireless communication equipment such as 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, transmitting and receiving node), NTN base stations, satellite equipment, flight platform equipment, and the like.

The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. Accordingly, the presently disclosed embodiments are considered in all respects to be illustrative and not restrictive. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all changes that come within the meaning and range of equivalents are intended to be embraced therein.

Claims

1. A first node for wireless communication, comprising:

2. The first node of claim 1, wherein the first node,

The first message is transmitted using SRB0 (SIGNALING RADIO BEARER 0 ); the sentence, whether the first message is sent over a direct path or over an indirect path, is used to determine whether the target value is a candidate in the first set of candidates or the meaning of the second candidate is: whether SRB0 is mapped to a direct path or an indirect path is used to determine whether the target value is a candidate in the first candidate set or the second candidate.

3. The first node according to claim 1 or 2, characterized in that,

The first signaling is unicast and the second signaling is broadcast; or both the first signaling and the second signaling are broadcast.

4. A first node according to any one of the claims 1 to 3, characterized in that,

Whether the target value is a candidate value in the first set of candidate values or the second candidate value is independent of whether the first node appears as a first type UE when at least one of the first signaling and the second signaling is received; the first class of UEs transmit information using at least an indirect path.

5. The first node according to any of the claims 1 to 4, characterized in that,

Whether the target value is a candidate value in the first set of candidate values or the second candidate value is independent of whether at least one of the first signaling and the second signaling is received over a direct path or over an indirect path.

6. The first node according to any of the claims 1 to 5, characterized in that,

The first signaling includes an RRC reconfiguration message; rlf-TimersAndConstants cells included in the first signaling indicate candidates in the first set of candidates; the second signaling includes a system message block 12 (SIB 12), the system message block 12 for configuring sidelink communications; the UE-TimersAndConstantsRemoteUE cell included in the second signaling indicates the second candidate value;

wherein the second candidate value is determined as the target value.

7. The first node according to any of the claims 1 to 5, characterized in that,

The first signaling includes a system message block 1; the system message block 1 comprises scheduling information of other system messages; the UE-TimersAndConstants cells included in the first signaling indicate candidates in the first set of candidates; the second signaling includes a system message block 12 (SIB 12), the system message block 12 for configuring sidelink communications; the UE-TimersAndConstantsRemoteUE cell included in the second signaling indicates the second candidate value;

wherein the second candidate value is determined as the target value.

8. The first node according to any of the claims 1 to 7, characterized in that,

The first signaling is used to configure a second timer and N; the starting conditions of the second timer include: detecting that a physical layer of the SpCell has a problem; the stop condition of the second timer includes: receiving N consecutive synchronization indications from a lower layer for SpCell;

9. The first node according to any of the claims 1 to 8, characterized in that,

The first set of candidate values includes a first candidate value and a third candidate value, the first candidate value being for a direct path and the third candidate value being for a non-direct path; when the first message is sent over a direct path, the first candidate value is determined as the target value; the third candidate value is determined as the target value when the first message is sent over an indirect path.

10. A method in a first node for wireless communication, comprising:

Wherein the first message is an RRC message, the first message being used to request an RRC connection, the first message being used to determine whether the target value is a candidate in the first set of candidates or the second candidate, whether the first message is sent over a direct path or over an indirect path; the indirect path is to relay transmission information through L2 (Layer-2) U2N (UE to Network); the direct path is not to relay transmission information through L2U 2N; the stop condition of the first timer includes receiving a response to the first message;

Expiration of the first timer is used to determine an RRC connection failure.