A method and device for wireless communication

Abstract

The present application discloses a method and device for wireless communication, including receiving a first signaling, the first signaling being used to configure a first RLC bearer to be inactive; sending a first message; the first message being used to request activation of the opposite RLC bearer of the first RLC bearer; when each condition in a first condition set is met, switching the first RLC bearer to an active state; wherein the first RLC bearer is associated with a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling. The present application activates the first RLC bearer by sending the first message, thereby improving reliability and reducing power consumption.

Description

Technical Field

[0001] The present application relates to a transmission method and device in a wireless communication system, and in particular to a transmission method and device for improving system efficiency, optimizing resource utilization, avoiding resource waste, saving power, reducing service interruption, enhancing service continuity, and improving reliability in wireless communication. Background Art

[0002] In the future, the application scenarios of wireless communication systems will become more and more diversified, and different application scenarios will put forward different performance requirements for the system. In order to meet the different performance requirements of various application scenarios, the 3GPP (3rd Generation Partner Project) RAN (Radio Access Network) #72 plenary meeting decided to study the new radio (NR) (or Fifth Generation, 5G) technology, and the NR WI (Work Item) was passed at the 3GPP RAN #75 plenary meeting, and the standardization work on NR began.

[0003] In communication, both LTE (Long Term Evolution) and 5G NR involve accurate reception of reliable information, optimized energy efficiency, determination of information validity, flexible resource allocation, scalable system structure, efficient non-access layer information processing, low service interruption and drop rate, and support for low power consumption. This is of great significance to the normal communication between base stations and user equipment, the reasonable scheduling of resources, and the balancing of system loads. It can be said to be the cornerstone of high throughput, meeting the communication needs of various services, improving spectrum utilization, and improving service quality. It is indispensable for eMBB (ehanced Mobile BroadBand), URLLC (Ultra Reliable Low Latency Communication) and eMTC (enhanced Machine Type Communication). At the same time, in IIoT (Industrial Internet of Things), V2X (Vehicular to X), device to device, unlicensed spectrum communication, user communication quality monitoring, network planning optimization, NTN (Non Territerial Network), TN (Territial Network), dual connectivity systems, a mixture of the above communication modes, wireless resource management and multi-antenna codebook selection, signaling design, neighbor management, service management, and beamforming, there are extensive demands. Information transmission methods are divided into broadcast and unicast. Both transmission methods are essential for 5G systems because they are very helpful in meeting the above requirements.

[0004] As the scenarios and complexity of the system continue to increase, higher requirements are placed on reducing interruption rates, reducing latency, enhancing reliability, enhancing system stability, business flexibility, and power saving. At the same time, compatibility between different versions of different systems also needs to be considered during system design. Summary of the invention

[0005] In many communication scenarios, especially in networks that support relays, reliable data transmission is involved, such as low-cost IoT devices or Internet of Vehicles devices. Since these devices may be in a mobile state, they may encounter unstable network connections, which is more serious and complicated than the movement of terminals in ordinary mobile networks. At the same time, these devices may be in the cellular network, or they may be outside the coverage of the cellular network, or they may be located at the edge of the coverage, resulting in unstable coverage of the cellular network. For some applications, especially those with certain requirements for latency and reliability, the reliability problem needs to be solved. In the case of unstable and unreliable connections, higher reliability requirements must also be met. When the terminal is connected to the cellular network, the Uu interface is used. When connecting to the network through a relay, the PC5 can be used to connect to the relay, and the L2 or L3 relay method can be used to maintain connection and communication with the network. Especially at the edge of the cell, the terminal, that is, the remote node, needs to consider what kind of link meets the requirements, and also needs to monitor the available relay resources. In order to meet the communication, the establishment and activation of the link or link are interrelated with the user's situation, and it is also necessary to coordinate and process the transmission that has achieved higher reliability. In the network protocols and interfaces of NR that are specially designed for communication between nodes such as the Internet of Vehicles, sub-links and related technologies are being used and studied. In previous studies, the use of sub-links for relaying, especially L2 relaying, has not been studied in depth and maturity, especially when higher reliability requirements are required. Therefore, when the link is interrupted or fails, the terminal generally needs to spend time re-searching and re-establishing a new link, resulting in data interruption, which does not solve the above problem. The present application provides a more ideal solution to configure the link at the correct time, especially to configure multiple links, but manages the RLC bearer between inactive and active states so that it is controlled by the first condition, because making many RLC bearers active at the same time will waste resources and electricity. The method proposed in this application ensures lower latency, lower power consumption and less resource consumption, and the complexity of implementation is also low, thereby solving the above problems well.

[0006] With regard to the above-mentioned problems, this application provides a solution.

[0007] It should be noted that, in the absence of conflict, the embodiments and features in any node of the present application can be applied to any other node. In the absence of conflict, the embodiments and features in the embodiments of the present application can be arbitrarily combined with each other.

[0008] The present application discloses a method in a first node used for wireless communication, comprising:

[0009] receiving a first signaling, where the first signaling is used to configure a first RLC bearer to be in an inactive state;

[0010] Sending a first message; the first message is used to request activation of the opposite RLC bearer of the first RLC bearer;

[0011] When each condition in the first condition set is satisfied, switching the first RLC bearer to an active state;

[0012] The first RLC bearer is associated to a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling.

[0013] As an embodiment, the problems to be solved by the present application include: when the terminal is in an unstable network, how to ensure the reliability of its transmission; especially when a relay is needed, since each section of the relay is controlled by a different node and each node may move, the communication link will require special management, otherwise, on the one hand, the communication quality will be reduced, and on the other hand, if multiple links are maintained, it will lead to excessive resource consumption, complex management, and excessive power consumption; as proposed in the present application, a better way to balance all these factors is to configure at least one inactive RLC bearer associated with the wireless bearer, which is activated when the conditions are met, so as to avoid the delay in re-establishing the link, and also reduce power consumption and management complexity, thereby solving the above problems.

[0014] As an embodiment, the benefits of the above method include: configuring an inactive RLC bearer. Although it is inactive, the bearer itself has been configured, so the delay in re-establishing a new bearer can be reduced and data communication interruption can be avoided. On the other hand, the number of active bearers is less than the total bearer data, which can simplify management.

[0015] Specifically, according to one aspect of the present invention, as a response to receiving the first signaling, the first RLC bearer is established and the first RLC bearer is set to an inactive state.

[0016] Specifically, according to one aspect of the present invention, when a first condition set is satisfied, a first status report is sent;

[0017] The first status report is used to indicate the PDCP SDU received through the first link.

[0018] Specifically, according to one aspect of the present invention, the first condition set includes the first node entering an RRC idle state.

[0019] Specifically, according to one aspect of the present invention, it includes: receiving a second message, the sender of the second message is a second node; the opposite RLC bearer of the first RLC bearer is maintained by the second node, and the second message indicates at least the latter of the RRC state of the second node and the service cell where the second node resides.

[0020] Specifically, according to one aspect of the present invention, the method includes: receiving a second signaling indicating an L3 relay configuration of the first link;

[0021] When both the first link and the second link fail, the second signaling is applied to configure the first link; when the first link fails and the second link does not fail, the first signaling is applied to configure the first link;

[0022] The first signaling indicates the L2 relay configuration of the first link; and the communication nodes on the second link include the first node and the primary serving cell of the first node.

[0023] Specifically, according to one aspect of the present invention, the method includes: receiving a third signaling;

[0024] Among them, the first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer; when any condition in the second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer of the sender of the third signaling is in a running state.

[0025] Specifically, according to one aspect of the present invention, it includes: receiving a fourth signaling, the fourth signaling indicating a first cell, the first cell being the primary service cell of the second node; the fourth signaling indicating a first reception quality, the first reception quality being the link quality between the second node and the first cell.

[0026] Specifically, according to one aspect of the present application, the first node is a user equipment.

[0027] Specifically, according to one aspect of the present application, the first node is an Internet of Things terminal.

[0028] Specifically, according to one aspect of the present application, the first node is a relay.

[0029] Specifically, according to one aspect of the present application, the first node is a vehicle-mounted terminal.

[0030] Specifically, according to one aspect of the present application, the first node is an aircraft.

[0031] The present application discloses a method in a second node used for wireless communication, comprising:

[0032] receiving a first message, where the first message is used to request activation of an opposite RLC bearer of the first RLC bearer;

[0033] Setting the opposite RLC bearer of the first RLC bearer to an active state;

[0034] Wherein, when each condition in the first condition set is satisfied, the sender of the first message sends the first message;

[0035] In which, the first RLC bearer is associated to the first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, the communication nodes on the first link include the sender of the first message, and the primary service cell of the sender of the first message and at least one of the second node.

[0036] Specifically, according to one aspect of the present invention, a fifth signaling is received, and as a response to receiving the fifth signaling, an opposite RLC bearer of the first RLC bearer is established, and the opposite RLC bearer of the first RLC bearer is set to an inactive state.

[0037] Specifically, according to one aspect of the present invention, a fifth message is sent, wherein the fifth message requests activation of the opposite RLC bearer of the first RLC bearer.

[0038] Specifically, according to one aspect of the present invention, the first condition set includes the sender of the first message entering an RRC idle state.

[0039] Specifically, according to one aspect of the present invention, it includes: sending a second message, the opposite RLC bearer of the first RLC bearer is maintained by the second node, and the second message indicates at least the latter of the RRC state of the second node and the service cell where the second node resides.

[0040] Specifically, according to one aspect of the present invention, the method includes: sending a third signaling;

[0041] Among them, the first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer; when any condition in the second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer is in a running state.

[0042] Specifically, according to one aspect of the present invention, it includes: sending a fourth message, wherein the fourth message indicates a first reception quality, and the first reception quality is a link quality from the second node to a primary service cell of the second node.

[0043] Specifically, according to one aspect of the present invention, the method includes: receiving sixth signaling;

[0044] The sixth signaling is RRC signaling; the sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the sixth signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

[0045] Specifically, according to one aspect of the present application, the first node is a user equipment.

[0046] Specifically, according to one aspect of the present application, the first node is an Internet of Things terminal.

[0047] Specifically, according to one aspect of the present application, the first node is a relay.

[0048] Specifically, according to one aspect of the present application, the first node is a vehicle-mounted terminal.

[0049] Specifically, according to one aspect of the present application, the first node is an aircraft.

[0050] The present application discloses a method in a third node used for wireless communication, comprising:

[0051] Sending a first signaling; the first signaling is used to configure the first RLC bearer to be in an inactive state;

[0052] Wherein, when each condition in the first condition set is met, the receiver of the first signaling sends the first message; the first message is used to request activation of the opposite end RLC bearer of the first RLC bearer;

[0053] In which, when each condition in the first condition set is met, the receiver of the first signaling switches the first RLC bearer to an active state and sends the first message; the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the receiver of the first signaling and the third node.

[0054] Specifically, according to one aspect of the present invention, a first status report is received;

[0055] The first status report is used to indicate the PDCP SDU received through the first link.

[0056] Specifically, according to one aspect of the present invention, the first condition set includes the recipient of the first signaling entering an RRC idle state.

[0057] Specifically, according to one aspect of the present invention, the method includes sending a second signaling, where the second signaling indicates an L3 relay configuration of the first link;

[0058] When the first link and the second link fail at the same time, the receiver of the first signaling applies the second signaling to configure the first link; when the first link fails and the second link does not fail, the receiver of the first signaling applies the first signaling to configure the first link;

[0059] The first signaling indicates the L2 relay configuration of the first link; and the communication nodes on the second link include the receiver of the first signaling and the three nodes.

[0060] Specifically, according to one aspect of the present invention, it includes: receiving a fourth message, the fourth message indicating a first reception quality, the first reception quality being a link quality from a second node to a primary service cell of the second node.

[0061] Specifically, according to one aspect of the present invention, it includes sending a fourth signaling, wherein the fourth signaling indicates a first cell, and the first cell is a primary service cell of a second node; the fourth signaling indicates a first reception quality, and the first reception quality is a link quality between the second node and the first cell.

[0062] Specifically, according to one aspect of the present invention, it includes receiving a fifth message, wherein the fifth message requests activation of the opposite RLC bearer of the first RLC bearer.

[0063] Specifically, according to one aspect of the present invention, the method includes: sending a sixth signaling;

[0064] The fifth message is used to trigger the sixth signaling, and the sixth signaling is RRC signaling; the sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the sixth signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

[0065] Specifically, according to one aspect of the present invention, a fifth signaling is received, and as a response to receiving the fifth signaling, an opposite RLC bearer of the first RLC bearer is established, and the opposite RLC bearer of the first RLC bearer is set to an inactive state.

[0066] Specifically, according to one aspect of the present application, the third node is a base station.

[0067] Specifically, according to one aspect of the present application, the third node is a relay.

[0068] Specifically, according to one aspect of the present application, the third node is a vehicle-mounted terminal.

[0069] Specifically, according to one aspect of the present application, the third node is an aircraft.

[0070] Specifically, according to one aspect of the present application, the third node is a group header.

[0071] Specifically, according to one aspect of the present application, the third node is a satellite.

[0072] The application discloses a first node used for wireless communication, comprising:

[0073] A first receiver receives a first signaling, where the first signaling is used to configure a first RLC bearer to be in an inactive state;

[0074] A first transmitter sends a first message; the first message is used to request activation of a peer RLC bearer of the first RLC bearer;

[0075] a first processor, switching the first RLC bearer to an active state when each condition in a first condition set is satisfied;

[0076] The first RLC bearer is associated to a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling.

[0077] The application discloses a second node used for wireless communication, comprising:

[0078] A second receiver receives a first message, where the first message is used to request activation of an opposite RLC bearer of the first RLC bearer;

[0079] The second processor sets the opposite RLC bearer of the first RLC bearer to an active state;

[0080] Wherein, when each condition in the first condition set is satisfied, the sender of the first message sends the first message;

[0081] The first RLC bearer is associated to a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, the communication nodes on the first link include a first node, and a primary service cell of the first node and at least one of the second node.

[0082] The application discloses a third node used for wireless communication, comprising:

[0083] A third transmitter sends a first signaling, wherein the first signaling is used to configure the first RLC bearer to be in an inactive state;

[0084] Wherein, when each condition in the first condition set is met, the receiver of the first signaling sends the first message; the first message is used to request activation of the opposite end RLC bearer of the first RLC bearer;

[0085] In which, when each condition in the first condition set is met, the recipient of the first signaling switches the first RLC bearer to an active state and sends the first message; the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the third node.

[0086] As an embodiment, compared with the traditional solution, this application has the following advantages:

[0087] In scenarios involving the use of sidelink relays, since users may be mobile, relay nodes may also be mobile, and even base stations may be mobile, there may be multiple relay nodes. Users may directly connect to the service cell, or they may need to connect to the service cell through a relay due to coverage issues, or they may choose to use a relay to connect to the service cell due to internal algorithms. These nodes may not have a fixed, constant geographical location and relationship, or may not support the air interface technology of the service cell, such as millimeter wave. Such scenarios are often seen in the Internet of Vehicles, the Internet of Things, wearable devices, etc. Since the sidelink communication is often close-range, this will cause users to need to change, or even frequently change relay nodes; this will put the stable link between the user and the network at risk. For services with high latency and reliability requirements, frequent establishment of new connections will reduce the service quality of the service. For a communication link, especially when relays are involved, establishing a link from the user to the network and carrying it are relatively complex, requiring multiple steps, and may also involve authentication, etc., which will further increase latency, especially for links that have not yet established a link. Therefore, the present application proposes to configure an inactive RLC bearer for the user, which can be one or more than one, which can be used immediately when needed, and can be decided by the user himself and activated by explicit or implicit means; on the other hand, configuring it as an inactive state is conducive to reducing complexity, for example, ensuring that the user has at most one active link or RLC bearer, which can reduce the difficulty of management and coordination between multiple nodes, and when a link fails, another link can be quickly activated. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0089] Figure 1 A flowchart of receiving a first signaling and sending a first message according to an embodiment of the present application is shown;

[0090] Figure 2 A schematic diagram of a network architecture according to an embodiment of the present application is shown;

[0091] Figure 3 A schematic diagram showing an embodiment of a wireless protocol architecture of a user plane and a control plane according to an embodiment of the present application;

[0092] Figure 4 A schematic diagram showing a first communication device and a second communication device according to an embodiment of the present application is shown;

[0093] Figure 5A flow chart showing the transmission of a wireless signal according to an embodiment of the present application is shown;

[0094] Figure 6 A flow chart showing the transmission of a wireless signal according to an embodiment of the present application is shown;

[0095] Figure 7 A schematic diagram showing a network structure according to an embodiment of the present application is shown;

[0096] Figure 8 A schematic diagram showing a network structure according to an embodiment of the present application is shown;

[0097] Fig. 9 A schematic diagram showing a network structure according to an embodiment of the present application is shown;

[0098] Fig.10 A schematic diagram of a protocol stack according to an embodiment of the present application is shown;

[0099] Fig.11 A schematic diagram illustrating a processing device in a first node according to an embodiment of the present application is illustrated;

[0100] Fig.12 A schematic diagram illustrating a processing device in a second node according to an embodiment of the present application is illustrated;

[0101] Fig.13 A schematic diagram of a processing device used in a third node according to an embodiment of the present application is illustrated. DETAILED DESCRIPTION

[0102] The technical solution of the present application will be further described in detail below in conjunction with the accompanying drawings. It should be noted that, unless there is a conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0103] Example 1

[0104] Embodiment 1 illustrates a flowchart of receiving a first signaling and sending a first message according to an embodiment of the present application, as shown in the attached Figure 1 Attached Figure 1 In the figure, each box represents a step. It should be emphasized that the order of the boxes in the figure does not represent the temporal relationship between the steps represented.

[0105] In Embodiment 1, the first node in the present application receives a first signaling in step 101; sends a first message in step 102;

[0106] Among them, the first signaling is used to configure the first RLC bearer to be inactive; the first message is used to request activation of the opposite RLC bearer of the first RLC bearer; when each condition in the first condition set is met, the first RLC bearer is switched to an active state; the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling.

[0107] As an embodiment, the first signaling includes RRC signaling.

[0108] As an embodiment, the first signaling includes PC5-S signaling.

[0109] As an embodiment, the first signaling includes PC5-RRC signaling.

[0110] As an embodiment, the first signaling includes RRCReconfiguration.

[0111] As an embodiment, the first signaling includes part of the information elements in RRCReconfiguration.

[0112] As an embodiment, the first signaling includes RRCReconfigurationSidelink.

[0113] As an embodiment, the first RLC bearer is an RLCbearer.

[0114] As an embodiment, the first RLC bearer includes an RLC mode, and the RLC mode includes AM and UM.

[0115] As an embodiment, the first RLC bearer includes the length of the sequence number used by the RLC.

[0116] As an embodiment, the first signaling includes RLC-Config.

[0117] As an embodiment, the first signaling includes a portion of fields in RLC-Config.

[0118] As an embodiment, the first signaling includes SL-RLC-Config.

[0119] As an embodiment, the first signaling includes a portion of the fields in SL-RLC-Config.

[0120] As an embodiment, the first signaling includes SL-ConfigDedicatedNR.

[0121] As an embodiment, the first RLC bearer is configured as an inactive state including an inactive state.

[0122] As an embodiment, the first RLC bearer is configured as an inactive state including a Deactived state.

[0123] As an embodiment, the first RLC bearer is configured as an inactive state including a suspended state.

[0124] As an embodiment, the first RLC bearer is configured as an inactive state, including a state that needs to be activated before it can be used.

[0125] As an embodiment, the first radio bearer is a RB (radio bearer).

[0126] As an embodiment, the first wireless bearer is a bearer of a Uu interface.

[0127] As an embodiment, the first wireless bearer is a bearer of PC5 port.

[0128] As an embodiment, the first radio bearer is in a normal communication state.

[0129] As an embodiment, the first radio bearer is in a state where normal communication can be performed without activation.

[0130] As an embodiment, the first radio bearer is in a state other than inactive.

[0131] As an embodiment, the first radio bearer is in a state other than Deactived.

[0132] As an embodiment, the first radio bearer is in a state other than suspended.

[0133] As an embodiment, the first radio bearer is in an active state.

[0134] As an embodiment, the first radio bearer is in an actived state.

[0135] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: the active state of the first RLC bearer includes states other than an inactive state.

[0136] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: the active state of the first RLC bearer includes being in a normal communication state.

[0137] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: the active state of the first RLC bearer includes a state in which normal communication can be performed without activation.

[0138] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: the active state of the first RLC bearer includes a state other than inactive.

[0139] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: the active state of the first RLC bearer includes a state other than Deactived.

[0140] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: the active state of the first RLC bearer includes being in an actived state.

[0141] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: the active state of the first RLC bearer includes a state other than suspended.

[0142] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: the active state of the first RLC bearer includes being in an actived state.

[0143] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: changing the state of the first RLC bearer from an inactive state to an active state.

[0144] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: activating the first RLC bearer.

[0145] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meanings: activating the first RLC bearer so that the first RLC bearer enters an active state.

[0146] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: activating the RLC entity corresponding to the first RLC bearer.

[0147] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: continuing (resume) the first RLC bearer.

[0148] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: setting the state variable of the RLC entity corresponding to the first RLC bearer to a modifiable state.

[0149] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: importing the state variables of the RLC entity corresponding to the first RLC bearer.

[0150] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: setting the state variable of the RLC entity corresponding to the first RLC bearer to an initial value.

[0151] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meanings: notifying the PDCP layer that the first RLC bearer or the RLC layer corresponding to the first RLC bearer enters an active state.

[0152] As an embodiment, the sentence "switching the first RLC bearer to an active state" includes the following meaning: notifying the PDCP layer that the first RLC bearer or the RLC layer corresponding to the first RLC bearer is resumed.

[0153] As an embodiment, the first signaling includes SL-RLC-BearerConfig.

[0154] As an embodiment, the first signaling includes sl-RLC-BearerConfigIndex.

[0155] As an embodiment, the first signaling includes sl-ServedRadioBearer.

[0156] As an embodiment, the sl-ServedRadioBearer indicates SLRB-Uu-ConfigIndex.

[0157] As an embodiment, the SLRB-Uu-ConfigIndex indicates the first radio bearer.

[0158] As an embodiment, the SLRB-Uu-ConfigIndex uniquely determines the first radio bearer.

[0159] As an embodiment, the first radio bearer is mapped to the first RLC bearer.

[0160] As an embodiment, the first signaling indicates that the first radio bearer is mapped to the first RLC bearer.

[0161] As an embodiment, the configuration of the first RLC bearer included in the first signaling includes the identity of the first radio bearer.

[0162] As an embodiment, the configuration of the first RLC bearer included in the first signaling includes an index of the first radio bearer.

[0163] As an embodiment, the first signaling includes sl-MAC-LogicalChannelConfig.

[0164] As an embodiment, the 0th signaling configures the second RLC bearer to be active.

[0165] As an embodiment, the 0th signaling indicates that the second RLC bearer is associated with the first radio bearer.

[0166] As an embodiment, the 0th signaling configures N RLC bearers to be associated with the first radio bearer, where N is a positive integer greater than 1, and Nm of the RLC bearers are inactive; and m is a positive integer.

[0167] As a sub-embodiment of this embodiment, m is equal to 1.

[0168] As a sub-embodiment of this embodiment, the first radio bearer is mapped to any one of the N RLC bearers.

[0169] As a sub-embodiment of this embodiment, the data carried by the first radio bearer is sent only through the active RLC bearer among the N RLC bearers.

[0170] As an embodiment, the first radio bearer includes an SRB.

[0171] As an embodiment, the first radio bearer includes a DRB.

[0172] As an embodiment, the first radio bearer includes an MRB.

[0173] As an embodiment, the first wireless bearer includes a SLRB.

[0174] As an embodiment, the first RLC bearer is configured as AM mode.

[0175] As an embodiment, the first RLC bearer is configured as UM mode.

[0176] As an embodiment, the first link includes a radio link.

[0177] As an embodiment, the first link includes link.

[0178] As an embodiment, the first link includes a wireless link of a Uu interface.

[0179] As an embodiment, the first link includes a wireless link of a PC5 interface.

[0180] As an embodiment, the first link includes an SRB.

[0181] As an embodiment, the first link includes a DRB.

[0182] As an embodiment, the first link includes a SLRB.

[0183] As an embodiment, the first link includes a physical layer link.

[0184] As an embodiment, the first link includes a beam.

[0185] As an embodiment, the first link is uniquely determined by an SSB.

[0186] As an embodiment, the first link is uniquely determined by multiple SSBs.

[0187] As an embodiment, the first link is uniquely determined by a CSI-RS.

[0188] As an embodiment, the first link is uniquely determined by multiple CSI-RSs.

[0189] As an embodiment, the first link is determined by one of a group of reference signals indicated by failureDetectionResources.

[0190] As an embodiment, the first link is determined by one of a group of reference signals indicated by candidateBeamRSList.

[0191] As an embodiment, the service cell of the first node configures failureDetectionResources and candidateBeamRSList.

[0192] As an embodiment, the relay node of the first node configures failureDetectionResources and candidateBeamRSList.

[0193] As an embodiment, the internal algorithm of the first node configures failureDetectionResources and candidateBeamRSList by default.

[0194] As an embodiment, the first link is the first one in ssb-PositionsInBurst.

[0195] As an embodiment, the first link is the first radio bearer.

[0196] As an embodiment, the first radio bearer is associated with the first link.

[0197] As an embodiment, the data transmitted by the first wireless bearer occupies the first link.

[0198] As an embodiment, the first link is configured by the first signaling.

[0199] As an embodiment, the first signaling includes the identity of the first link.

[0200] As an embodiment, the first link is configured by a service cell of the first node.

[0201] As an embodiment, the first link is determined by one of the measurement objects configured in the serving cell of the first node.

[0202] As an embodiment, the first link is a wireless link for receiving the first signaling configuration.

[0203] As an embodiment, the first link is a wireless link corresponding to the RLC bearer in an active state.

[0204] As an embodiment, the first link is an air interface.

[0205] As an embodiment, the first link is associated with an active RLC bearer among the RLC bearers associated with the first radio bearer.

[0206] As an embodiment, the first link is associated with the first radio bearer.

[0207] As an embodiment, the first link is associated with a MAC entity.

[0208] As an embodiment, the first link includes a default BWP.

[0209] As an embodiment, the first link includes a link between the first node and a primary serving cell.

[0210] As an embodiment, the first link includes a link between the first node and a resident cell.

[0211] As an embodiment, the first link includes a link between the first node and a cell with the strongest signal.

[0212] As an embodiment, the first link failure includes radio link failure.

[0213] As an embodiment, the first link failure includes beam failure.

[0214] As an embodiment, the first link failure includes HARQ reaching a maximum number of retransmissions.

[0215] As an embodiment, the first link failure includes RLC reaching a maximum number of retransmissions.

[0216] As an embodiment, the failure of the first link includes expiration of a timer associated with the first link.

[0217] As an embodiment, the first link failure includes T304 expiration.

[0218] As an embodiment, the first link failure includes T312 expiration.

[0219] As an embodiment, the first link failure includes T316 expiration.

[0220] As an embodiment, the first link failure includes T310 expiration.

[0221] As an embodiment, the first link failure includes a failure in SRB transmission.

[0222] As an embodiment, the first link failure includes that the quality of a reference signal associated with the first link is lower than a given threshold.

[0223] As an embodiment, the failure of the first link includes that the delay of data transmitted on the first link exceeds a given threshold.

[0224] As an embodiment, the first link failure includes that the BLER of data transmitted on the first link exceeds a given threshold.

[0225] As an embodiment, the first link failure includes that the BER of data transmitted on the first link exceeds a given threshold.

[0226] As an embodiment, the first link failure includes failure to receive a response to signaling sent on the first link.

[0227] As an embodiment, the sender of the first signaling includes a second node.

[0228] As an embodiment, the sender of the first signaling includes a third node.

[0229] As an embodiment, the communication nodes on the first link include the first node, the second node and the third node.

[0230] As an embodiment, the opposite RLC bearer of the first RLC bearer is maintained by the second node.

[0231] As an embodiment, the second node is a relay node of the first link.

[0232] As an embodiment, the second node is a recipient of the first message.

[0233] As an embodiment, the second node is a node other than the nodes included in the measurement objects indicated by the service cell of the first node.

[0234] As an embodiment, the third node is a service cell of the first node.

[0235] As an embodiment, the third node is the primary service cell of the first node.

[0236] As an embodiment, the second node is a relay node of the first node.

[0237] As an embodiment, the first message includes RRC (Radio Resource Control) signaling.

[0238] As an embodiment, the first message includes PC5 signaling.

[0239] As an embodiment, the first message includes MAC CE.

[0240] As an embodiment, the first message explicitly indicates a request to activate the opposite RLC bearer of the first RLC bearer.

[0241] As an embodiment, the first message implicitly indicates a request to activate the opposite RLC bearer of the first RLC bearer.

[0242] As a sub-embodiment of this embodiment, the first message includes msg1 (message 1).

[0243] As a sub-embodiment of this embodiment, the first message includes msgA (message A).

[0244] As a sub-embodiment of this embodiment, the first message includes msg1 (message 1) sent on specific resources.

[0245] As a sub-embodiment of this embodiment, the first message includes a preamble using a special format.

[0246] As a sub-embodiment of this embodiment, the first message includes msgA (message A) sent on specific resources.

[0247] As a sub-embodiment of this embodiment, the first signaling configures the first message.

[0248] As a sub-embodiment of this embodiment, the serving cell of the first node configures the first message.

[0249] As a sub-embodiment of this embodiment, the first message includes RLC data, and the data belonging to the first RLC bearer is received and used to request activation of the opposite-end RLC bearer of the first RLC bearer.

[0250] As a sub-embodiment of this embodiment, the first message includes an LCID in a MAC PDU, the LCID is the identity of the first RLC bearer, and the received LCID is used to request activation of the opposite RLC bearer of the first RLC bearer.

[0251] As a sub-embodiment of this embodiment, the first message includes an LCID in a MAC PDU, the LCID being the identity of the opposite RLC bearer of the first RLC bearer, and the received LCID is used to request activation of the opposite RLC bearer of the first RLC bearer.

[0252] As an embodiment, the communication nodes on the first link include the first node, the second node and the third node.

[0253] As an embodiment, the communication node on the first link includes a relay node.

[0254] As an embodiment, the first link failure includes a failure of a PC5 interface between the first node and the second node.

[0255] As a sub-embodiment of this embodiment, the failure includes a wireless link failure.

[0256] As a sub-embodiment of this embodiment, the failure includes beam failure.

[0257] As a sub-embodiment of this embodiment, the failure includes RLC retransmission reaching a maximum number of times.

[0258] As a sub-embodiment of this embodiment, the failure includes a compatibility error.

[0259] As an embodiment, the first signaling carries the identity of the first node.

[0260] As an embodiment, the first node is a recipient of the first signaling, including that the first signaling carries the identity of the first node.

[0261] As an embodiment, the MAC PDU carrying the first signaling carries the identity of the first node.

[0262] As an embodiment, the MAC PDU carrying the first signaling and the physical layer signaling scheduling the MAC PDU jointly carry the identity of the first node.

[0263] As an embodiment, the link quality includes the quality of the radio link obtained through radio link monitoring (RLM, radio link monitoring).

[0264] As a sub-embodiment of this embodiment, the quality of the wireless link includes RSRP.

[0265] As an embodiment, the link quality includes link quality obtained through measurement.

[0266] Example 2

[0267] Embodiment 2 illustrates a schematic diagram of a network architecture according to the present application, as shown in the attached Figure 2 shown.

[0268] Attached Figure 2A diagram of a network architecture 200 for 5G NR, LTE (Long-Term Evolution) and LTE-A (Long-Term Evolution Advanced) systems is illustrated. The 5G NR 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 / EPS 200 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) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. The 5GS / EPS may be interconnected with other access networks, but these entities / interfaces are not shown for simplicity. As shown, 5GS / EPS provides packet-switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol terminations toward UE 201. gNB 203 can be connected to other gNBs 204 via an Xn interface (e.g., backhaul). gNB 203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a TRP (transmitting receiving node), or some other suitable term. gNB 203 provides an access point to 5GC / EPC 210 for UE 201. Examples of UE 201 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, non-terrestrial base station communications, satellite mobile communications, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband Internet of Things devices, machine type communication devices, land vehicles, cars, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE 201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable term.gNB203 is connected to 5GC / EPC210 via the S1 / NG interface. 5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF213. MME / AMF / SMF211 is the control node that handles signaling between UE201 and 5GC / EPC210. ​​In general, MME / AMF / SMF211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF212, which itself is connected to P-GW / UPF213. P-GW provides UE IP address allocation and other functions. P-GW / UPF213 is connected to Internet service 230. Internet service 230 includes operator-corresponding Internet protocol services, which may specifically include Internet, Intranet, IMS (IP Multimedia Subsystem) and packet-switched streaming services.

[0269] As an embodiment, the UE201 corresponds to the first node in the present application.

[0270] As an embodiment, the UE201 corresponds to the second node in the present application.

[0271] As an embodiment, the UE 201 supports transmission in a non-terrestrial network (NTN).

[0272] As an embodiment, the UE201 supports transmission in a network with a large delay difference.

[0273] As an embodiment, the UE 201 supports V2X transmission.

[0274] As an embodiment, the UE 201 supports relay transmission.

[0275] As an embodiment, the UE241 corresponds to the first node in the present application.

[0276] As an embodiment, the UE241 corresponds to the second node in the present application.

[0277] As an embodiment, the UE 241 supports transmission in a non-terrestrial network (NTN).

[0278] As an embodiment, the UE241 supports transmission in a network with a large delay difference.

[0279] As an embodiment, the UE 241 supports V2X transmission.

[0280] As an embodiment, the UE 241 supports relay transmission.

[0281] As an embodiment, secondary link transmission is adopted between UE201 and UE241.

[0282] As an embodiment, the gNB203 corresponds to the third node in this application.

[0283] As an embodiment, the gNB203 supports transmission in a non-terrestrial network (NTN).

[0284] As an embodiment, the gNB203 supports transmission in a network with large latency difference.

[0285] As an embodiment, the gNB203 supports V2X transmission.

[0286] As an embodiment, the gNB203 supports MBS transmission.

[0287] As an embodiment, the gNB203 supports MBMS transmission.

[0288] Example 3

[0289] Embodiment 3 shows a schematic diagram of an embodiment of a wireless protocol architecture of a user plane and a control plane according to the present application, as shown in the attached Figure 3 Attached Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, Figure 3The radio protocol architecture of the control plane 300 for a first node (UE, satellite or aircraft in gNB or NTN) and a second node (satellite or aircraft in gNB, UE or NTN), or between two UEs is shown in three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to as PHY301 in this article. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the first node and the second node and the two UEs through PHY301. The L2 layer 305 includes a MAC (Medium Access Control) sublayer 302, an RLC (Radio Link Control) sublayer 303, and a PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the second node. The PDCP sublayer 304 provides multiplexing between different radio bearers and logical channels. The PDCP sublayer 304 also provides security by encrypting data packets, and provides support for inter-zone mobility of the first node between the second 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 various radio resources (e.g., resource blocks) in a cell between the first nodes. The MAC sublayer 302 is also responsible for HARQ operations. The RRC (Radio Resource Control) sublayer 306 in layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the second node and the first node. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). The radio protocol architecture for the first node and the second node in the user plane 350 is substantially the same as the corresponding layers and sublayers in the control plane 300 for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, the RLC sublayer 353 in the L2 layer 355, and the MAC sublayer 352 in the L2 layer 355, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. The L2 layer 355 in the user plane 350 also includes a SDAP (Service Data Adaptation Protocol) sublayer 356, which is responsible for mapping between QoS flows and data radio bearers (DRBs) to support the diversity of services.Although not shown, the first node may have several upper layers above the L2 layer 355. Also included are a network layer (e.g., IP layer) terminated at the P-GW on the network side and an application layer terminated at the other end of the connection (e.g., remote UE, server, etc.).

[0290] As an example, Figure 3 The wireless protocol architecture in is applicable to the first node in this application.

[0291] As an example, Figure 3 The wireless protocol architecture in is applicable to the second node in this application.

[0292] As an example, Figure 3 The wireless protocol architecture in is applicable to the second node in this application.

[0293] As an embodiment, the first signaling in the present application is generated in the RRC306 or the non-access stratum (NAS).

[0294] As an embodiment, the first message in the present application is generated in the PHY301 or PHY351 or MAC302 or MAC352 or RLC303 or RLC353 or RRC306 or non-access layer (NAS).

[0295] As an embodiment, the first status report in the present application is generated in the RLC303 or RLC353 or PDCP304 or PDCP354.

[0296] As an embodiment, the second message in the present application is generated in the PHY301 or PHY351 or MAC302 or MAC352 or RLC303 or RLC353 or RRC306 or non-access layer (NAS).

[0297] As an embodiment, the second signaling in the present application is generated in the RRC306 or the non-access stratum (NAS).

[0298] As an embodiment, the third signaling in the present application is generated in the RRC306 or the non-access stratum (NAS).

[0299] As an embodiment, the fourth signaling in the present application is generated in the RRC306 or the non-access stratum (NAS).

[0300] As an embodiment, the fifth signaling in the present application is generated in the RRC306 or the non-access stratum (NAS).

[0301] As an embodiment, the sixth signaling in the present application is generated in the RRC306.

[0302] As an embodiment, the fifth message in the present application is generated in the PHY301 or PHY351 or MAC302 or MAC352 or RLC303 or RLC353 or RRC306 or non-access layer (NAS).

[0303] Example 4

[0304] Embodiment 4 shows a schematic diagram of a first communication device and a second communication device according to the present application, as shown in the attached figure. Figure 4 shown. Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

[0305] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmit processor 468, a receive processor 456, a multi-antenna transmit processor 457, a multi-antenna receive processor 458, a transmitter / receiver 454 and an antenna 452.

[0306] The second communication device 410 includes a controller / processor 475 , a memory 476 , a receive processor 470 , a transmit processor 416 , a multi-antenna receive processor 472 , a multi-antenna transmit processor 471 , a transmitter / receiver 418 and an antenna 420 .

[0307] In transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network are provided to the controller / processor 475. The controller / processor 475 implements the functionality of the L2 layer. In transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). The transmit processor 416 implements coding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, as well as mapping of signal constellations based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing on the coded and modulated symbols to generate one or more spatial streams. The transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate a physical channel carrying a time-domain multi-carrier symbol stream. The multi-antenna transmit processor 471 then performs a transmit analog precoding / beamforming operation on the time-domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, and then provides it to a different antenna 420.

[0308] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the RF carrier and converts the RF stream into a baseband multi-carrier symbol stream and provides it to the receiving processor 456. The receiving processor 456 and the multi-antenna receiving processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiving processor 458 performs a receiving analog precoding / beamforming operation on the baseband multi-carrier symbol stream from the receiver 454. The receiving processor 456 uses a fast Fourier transform (FFT) to convert the baseband multi-carrier symbol stream after the receiving analog precoding / beamforming operation from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiving processor 456, wherein the reference signal will be used for channel estimation, and the data signal is recovered after multi-antenna detection in the multi-antenna receiving processor 458 to any spatial stream destined for the first communication device 450. The symbols on each spatial stream are demodulated and recovered in the receiving processor 456, and soft decisions are generated. The receiving processor 456 then decodes and deinterleaves the soft decisions to recover the upper layer data and control signals transmitted by the second communication device 410 on the physical channel. The upper layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of the L2 layer. The controller / processor 459 may be associated with a memory 460 that stores program codes and data. The memory 460 may be referred to as a computer-readable medium. In the transmission from the second communication device 410 to the second communication device 450, the controller / processor 459 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper layer data packets from the core network. The upper layer data packets are then provided to all protocol layers above the L2 layer. Various control signals may also be provided to L3 for L3 processing.

[0309] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, a data source 467 is used to provide upper layer data packets to the controller / processor 459. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission function at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between logical and transport channels based on radio resource allocation, and implements L2 layer functions for user plane and control plane. The controller / processor 459 is also responsible for the retransmission of lost packets and signaling to the second communication device 410. The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beamforming processing. Then, the transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream, which is then provided to different antennas 452 via the transmitter 454 after analog precoding / beamforming operations in the multi-antenna transmit processor 457. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmit processor 457 into a radio frequency symbol stream, and then provides it to the antenna 452.

[0310] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the reception function at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives a radio frequency signal through its corresponding antenna 420, converts the received radio frequency signal into a baseband signal, and provides the baseband signal to the multi-antenna reception processor 472 and the reception processor 470. The reception processor 470 and the multi-antenna reception processor 472 jointly implement the functions of the L1 layer. The controller / processor 475 implements the L2 layer functions. The controller / processor 475 can be associated with a memory 476 storing program codes and data. The memory 476 can be referred to as a computer-readable medium. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides multiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover the upper layer data packets from the UE 450. Upper layer packets from controller / processor 475 may be provided to the core network.

[0311] As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 450 apparatus at least: receives a first signaling, the first signaling is used to configure a first RLC bearer to be inactive; sends a first message; the first message is used to request activation of the opposite RLC bearer of the first RLC bearer; when each condition in a first condition set is met, switches the first RLC bearer to an active state; wherein the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling.

[0312] As an embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates actions when executed by at least one processor, and the actions include: receiving a first signaling, wherein the first signaling is used to configure a first RLC bearer to be inactive; sending a first message; the first message is used to request activation of the opposite RLC bearer of the first RLC bearer; when each condition in a first condition set is met, switching the first RLC bearer to an active state; wherein the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling.

[0313] As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor, and the first communication device 450 apparatus at least: receives a first message, the first message is used to request activation of the opposite RLC bearer of the first RLC bearer; sets the opposite RLC bearer of the first RLC bearer to an active state; wherein, when each condition in a first condition set is met, the sender of the first message sends the first message; wherein, the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, the communication nodes on the first link include a first node, and, a primary service cell of the first node and at least one of the second node.

[0314] As an embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, the computer-readable instruction program generates actions when executed by at least one processor, the actions including: receiving a first message, the first message being used to request activation of a counterpart RLC bearer of a first RLC bearer; setting the counterpart RLC bearer of the first RLC bearer to an active state; wherein, when each condition in a first condition set is met, the sender of the first message sends the first message; wherein, the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, the communication nodes on the first link include a first node, and, a primary service cell of the first node and at least one of the second node.

[0315] As an embodiment, the second communication device 410 device includes: at least one processor and at least one memory, the at least one memory includes computer program code; the at least one memory and the computer program code are configured to be used together with the at least one processor. The second communication device 410 device at least: sends a first signaling; the first signaling is used to configure the first RLC bearer to be inactive; wherein, when each condition in the first condition set is met, the receiver of the first signaling sends the first message; the first message is used to request activation of the opposite RLC bearer of the first RLC bearer; wherein, when each condition in the first condition set is met, the receiver of the first signaling switches the first RLC bearer to an active state and sends the first message; the first RLC bearer is associated with a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the third node.

[0316] As an embodiment, the second communication device 410 apparatus includes: a memory storing a computer-readable instruction program, wherein the computer-readable instruction program generates an action when executed by at least one processor, and the action includes: sending a first signaling; the first signaling is used to configure the first RLC bearer to be inactive; wherein, when each condition in the first condition set is met, the receiver of the first signaling sends the first message; the first message is used to request activation of the opposite RLC bearer of the first RLC bearer; wherein, when each condition in the first condition set is met, the receiver of the first signaling switches the first RLC bearer to an active state and sends the first message; the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the third node.

[0317] As an embodiment, the first communication device 450 corresponds to the first node in this application.

[0318] As an embodiment, the second communication device 450 corresponds to the second node in this application.

[0319] As an embodiment, the second communication device 410 corresponds to the third node in this application.

[0320] As an embodiment, the first communication device 450 is a UE.

[0321] As an embodiment, the first communication device 450 is a vehicle-mounted terminal.

[0322] As an embodiment, the second communication device 450 is a relay.

[0323] As an embodiment, the second communication device 410 is a base station.

[0324] As an embodiment, the second communication device 410 is a relay.

[0325] As an embodiment, the second communication device 410 is a UE.

[0326] As an embodiment, the second communication device 410 is a satellite.

[0327] As an embodiment, the receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 are used to receive the first signaling in the present application.

[0328] As an embodiment, the receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 are used to receive the second signaling in the present application.

[0329] As an embodiment, the receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 are used to receive the third signaling in the present application.

[0330] As an embodiment, the receiver 456 (including the antenna 460 ), the receiving processor 452 and the controller / processor 490 are used to receive the fourth signaling in the present application.

[0331] As an embodiment, the receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 are used to receive the second message in the present application.

[0332] As an embodiment, the transmitter 456 (including the antenna 460), the transmission processor 455 and the controller / processor 490 are used to send the first message in the present application.

[0333] As an embodiment, the transmitter 456 (including the antenna 460), the transmit processor 455 and the controller / processor 490 are used to send the first status report in the present application.

[0334] As an embodiment, the receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 are used to receive the first message in the present application.

[0335] As an embodiment, the receiver 456 (including the antenna 460 ), the receiving processor 452 and the controller / processor 490 are used to receive the fifth signaling in the present application.

[0336] As an embodiment, the receiver 456 (including the antenna 460), the receiving processor 452 and the controller / processor 490 are used to receive the sixth signaling in the present application.

[0337] As an embodiment, the transmitter 456 (including the antenna 460), the transmit processor 455 and the controller / processor 490 are used to send the fifth message in the present application.

[0338] As an embodiment, the transmitter 456 (including the antenna 460), the transmit processor 455 and the controller / processor 490 are used to send the second message in the present application.

[0339] As an embodiment, the transmitter 456 (including the antenna 460), the transmission processor 455 and the controller / processor 490 are used to send the third signaling in the present application.

[0340] As an embodiment, the transmitter 456 (including the antenna 460), the transmission processor 455 and the controller / processor 490 are used to send the fourth message in the present application.

[0341] As an embodiment, the transmitter 416 (including the antenna 420), the transmission processor 412 and the controller / processor 440 are used to send the first signaling in the present application.

[0342] As an embodiment, the transmitter 416 (including the antenna 420), the transmission processor 412 and the controller / processor 440 are used to send the second signaling in the present application.

[0343] As an embodiment, the transmitter 416 (including the antenna 420), the transmit processor 412 and the controller / processor 440 are used to send the fourth signaling in the present application.

[0344] As an embodiment, the transmitter 416 (including the antenna 420), the transmit processor 412 and the controller / processor 440 are used to send the sixth signaling in the present application.

[0345] As an embodiment, the receiver 416 (including the antenna 420), the receiving processor 412 and the controller / processor 440 are used to receive the first status report in the present application.

[0346] As an embodiment, the receiver 416 (including the antenna 420), the receiving processor 412 and the controller / processor 440 are used to receive the fifth message in the present application.

[0347] Example 5

[0348] Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in the attached Figure 5 Attached Figure 5 In the example, U01 corresponds to the first node of the present application, U02 corresponds to the second node of the present application, and U03 corresponds to the third node of the present application. It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in the present application, and the steps in F51 and F52 are optional.

[0349] for First node U01 , receiving the second message in step S5101; receiving the fourth signaling in step S5102; receiving the second signaling in step S5103; receiving the first signaling in step S5104; sending the first message in step S5105; receiving the third signaling in step S5106; and sending the first status report in step S5107.

[0350] for The second node U02 , sending the second message in step S5201; sending the fourth message in step S5202; receiving the first message in step S5203; and sending the third signaling in step S5204.

[0351] for The third node U03 , receiving the fourth message in step S5301; sending the fourth signaling in step S5302; sending the second signaling in step S5303; sending the first signaling in step S5304; receiving the first status report in step S5305.

[0352] In embodiment 5, the first signaling is used to configure the first RLC bearer to be inactive; the first message is used to request activation of the opposite RLC bearer of the first RLC bearer; when each condition in the first condition set is met, the first RLC bearer is switched to an active state;

[0353] The first RLC bearer is associated to a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling.

[0354] As an embodiment, the second node U02 is a relay node.

[0355] As an embodiment, the second node U02 is a UE.

[0356] As an embodiment, the second node U02 is an IAB node.

[0357] As an embodiment, the second node U02 is a relay of the first node U01.

[0358] As an embodiment, the third node U03 is the PCell of the first node U01.

[0359] As an embodiment, the third node N03 is the PSCell of the first node U01.

[0360] As an embodiment, the third node N03 is the MCG of the first node U01.

[0361] As an embodiment, the third node N03 is the SCG of the first node U01.

[0362] As an embodiment, the third node N03 is the target cell of the first node U01.

[0363] As an embodiment, the third node N03 is the source cell of the first node U01.

[0364] As an embodiment, the third node U03 is a relay of the first node U01.

[0365] As an embodiment, the opposite RLC bearer of the first RLC bearer is maintained by the second node U02, and the second message indicates at least the latter of the RRC state of the second node and the service cell where the second node U02 resides.

[0366] As a sub-embodiment of this embodiment, the RRC state of the second node U02 includes one of Connected, Idle and Inactive.

[0367] As a sub-embodiment of this embodiment, the second message indicates the identity of the serving cell where the second node U02 resides.

[0368] As a sub-embodiment of this embodiment, the second message indicates the cell identity of the serving cell where the second node U02 resides.

[0369] As a sub-embodiment of this embodiment, the second message indicates the physical cell identity of the serving cell where the second node U02 resides.

[0370] As a sub-embodiment of this embodiment, the second message indicates the SSB of the service cell where the second node U02 resides.

[0371] As a sub-embodiment of this embodiment, the second message indicates the CSI-RS of the serving cell where the second node U02 resides.

[0372] As a sub-embodiment of this embodiment, the second message is sent by broadcasting.

[0373] As a sub-embodiment of this embodiment, the second message is sent via unicast.

[0374] As a sub-embodiment of this embodiment, the second message includes a PC5-RRC message.

[0375] As a sub-embodiment of this embodiment, the second message includes a PC5-S message.

[0376] As a sub-embodiment of this embodiment, the second message is sent via a broadcast channel.

[0377] As a sub-embodiment of this embodiment, the second message is sent periodically.

[0378] As a sub-embodiment of this embodiment, the second node U02 is a group header of the first node U01.

[0379] As an embodiment, the third node U03 is a service cell of the second node U02.

[0380] As an embodiment, the third node U03 is the primary service cell of the second node U02.

[0381] As an embodiment, the third node U03 is a secondary service cell of the second node U02.

[0382] As an embodiment, the third node U03 has a signaling connection with the primary service cell of the second node U02.

[0383] As an embodiment, the fourth message indicates a first reception quality, where the first reception quality is a link quality from the second node U02 to a primary service cell of the second node U02.

[0384] As a sub-embodiment of this embodiment, the first reception quality includes RSRP.

[0385] As a sub-embodiment of this embodiment, the first reception quality includes RSRQ.

[0386] As a sub-embodiment of this embodiment, the first reception quality includes SNR.

[0387] As a sub-embodiment of this embodiment, the second node determines the link quality by measuring a reference signal sent by a primary serving cell of the second node U02.

[0388] As a sub-embodiment of this embodiment, the second node determines the link quality by measuring a reference signal sent by a primary serving cell of the second node U02 on a link used to determine the link quality.

[0389] As a sub-embodiment of this embodiment, the fourth message indicates the identity of the primary serving cell of the second node U02.

[0390] As an embodiment, the fourth signaling indicates a first cell, which is a primary service cell of the second node U02; the fourth signaling indicates a first reception quality, which is a link quality between the second node U02 and the first cell.

[0391] As a sub-embodiment of this embodiment, the fourth message is used to generate the fourth signaling.

[0392] As a sub-embodiment of this embodiment, the first cell is the third node U03.

[0393] As a sub-embodiment of this embodiment, the first cell is a cell outside the third node U03.

[0394] As an embodiment, the second signaling indicates the L3 relay configuration of the first link; when the first link and the second link fail at the same time, the first transmitter applies the second signaling to configure the first link; when the first link fails and the second link does not fail, the first transmitter applies the first signaling to configure the first link; wherein the first signaling indicates the L2 relay configuration of the first link; the communication nodes on the second link include the first node U01 and the primary service cell of the first node U01.

[0395] As an embodiment, the communication nodes of the second link include the first node U01 and the second node U02.

[0396] As an embodiment, the communication nodes of the second link include the first node U01 and the third node U03.

[0397] As an embodiment, the communication nodes of the second link include the first node U01, the second node U02 and the third node U03.

[0398] As an embodiment, the first RLC bearer is a bearer of the PC5 interface, one end of the first RLC bearer is maintained by the first node U01, and the other end is maintained by the second node U02.

[0399] As an embodiment, the first RLC bearer is an RLC bearer between the first node U01 and the second node U02, and the opposite RLC bearer of the first RLC bearer is the part of the first RLC bearer maintained by the second node U02.

[0400] As a sub-embodiment of this embodiment, the part of the first RLC bearer maintained by the second node U02 includes an RLC entity of the second node U02 for receiving data of the first RLC bearer.

[0401] As a sub-embodiment of this embodiment, the part of the first RLC bearer maintained by the second node U02 includes an RLC entity of the second node U02 used to send data of the first RLC bearer.

[0402] As a sub-embodiment of this embodiment, the part of the first RLC bearer maintained by the second node U02 includes the RLC entity of the second node U02 that belongs to the data of the first RLC bearer.

[0403] As a sub-embodiment of this embodiment, the part of the first RLC bearer maintained by the second node U02 includes the RLC entity of the second node U02 that belongs to the data of the first RLC bearer and its mapping relationship with the wireless bearer and state variables.

[0404] As an embodiment, the first RLC bearer is configured by the third node U03.

[0405] As an embodiment, an L3 relay is a layer 3 relay; an L2 relay is a layer 2 relay.

[0406] As an embodiment, the second link includes a radio link.

[0407] As an embodiment, the second link includes link.

[0408] As an embodiment, the second link includes a wireless link of a Uu interface.

[0409] As an embodiment, the second link includes a wireless link of a PC5 interface.

[0410] As an embodiment, the second link includes an SRB.

[0411] As an embodiment, the second link includes a DRB.

[0412] As an embodiment, the second link includes a SLRB.

[0413] As an embodiment, the second link includes a physical layer link.

[0414] As an embodiment, the second link includes a beam.

[0415] As an embodiment, the second link is uniquely determined by an SSB.

[0416] As an embodiment, the second link is uniquely determined by multiple SSBs.

[0417] As an embodiment, the second link is uniquely determined by a CSI-RS.

[0418] As an embodiment, the second link is uniquely determined by multiple CSI-RSs.

[0419] As an embodiment, the second link is determined by one of a group of reference signals indicated by failureDetectionResources.

[0420] As an embodiment, the second link is determined by one of a group of reference signals indicated by candidateBeamRSList.

[0421] As an embodiment, the service cell of the first node configures failureDetectionResources and candidateBeamRSList.

[0422] As an embodiment, the relay node of the first node configures failureDetectionResources and candidateBeamRSList.

[0423] As an embodiment, the internal algorithm of the first node configures failureDetectionResources and candidateBeamRSList by default.

[0424] As an embodiment, the second link is the first one in ssb-PositionsInBurst.

[0425] As an embodiment, the second link is the first radio bearer.

[0426] As an embodiment, the first radio bearer is associated with the second link.

[0427] As an embodiment, the data transmitted by the first wireless bearer occupies the second link.

[0428] As an embodiment, the second link is configured by the first signaling.

[0429] As an embodiment, the first signaling includes the identity of the second link.

[0430] As an embodiment, the second link is configured by a service cell of the first node.

[0431] As an embodiment, the second link is determined by one of the measurement objects configured in the serving cell of the first node.

[0432] As an embodiment, the second link is a wireless link that receives the first signaling configuration.

[0433] As an embodiment, the second link is a wireless link corresponding to the RLC bearer in an active state.

[0434] As an embodiment, the second link is an air interface.

[0435] As an embodiment, the second link is associated with an active RLC bearer among the RLC bearers associated with the first radio bearer.

[0436] As an embodiment, the second link is associated with the first radio bearer.

[0437] As an embodiment, the second link is associated with a MAC entity.

[0438] As an embodiment, the second link includes a default BWP.

[0439] As an embodiment, the second link includes a link between the first node and a primary serving cell.

[0440] As an embodiment, the second link includes a link between the first node and a resident cell.

[0441] As an embodiment, the second link includes a link between the first node and a cell with the strongest signal.

[0442] As an embodiment, the second link failure includes radio link failure.

[0443] As an embodiment, the second link failure includes beam failure.

[0444] As an embodiment, the second link failure includes HARQ reaching a maximum number of retransmissions.

[0445] As an embodiment, the second link failure includes RLC reaching the maximum number of retransmissions.

[0446] As an embodiment, the failure of the second link includes expiration of a timer associated with the second link.

[0447] As an embodiment, the second link failure includes T304 expiration.

[0448] As an embodiment, the second link failure includes T312 expiration.

[0449] As an embodiment, the second link failure includes T316 expiration.

[0450] As an embodiment, the second link failure includes T310 expiration.

[0451] As an embodiment, the second link failure includes a failure in SRB transmission.

[0452] As an embodiment, the second link failure includes that the quality of a reference signal associated with the second link is lower than a given threshold.

[0453] As an embodiment, the failure of the second link includes that the delay of data transmitted on the second link exceeds a given threshold.

[0454] As an embodiment, the second link failure includes that a BLER of data transmitted on the second link exceeds a given threshold.

[0455] As an embodiment, the second link failure includes that the BER of data transmitted on the second link exceeds a given threshold.

[0456] As an embodiment, the second link failure includes a failure to receive a response to signaling sent on the second link.

[0457] As an embodiment, the second link is a link of a PC5 interface.

[0458] As an embodiment, the second link is a link of a Uu interface.

[0459] As an embodiment, the second link is different from the first link.

[0460] As an embodiment, the sentence of applying the second signaling to configure the first link includes configuring the relay included in the first link as an L3 relay.

[0461] As an embodiment, the sentence of applying the first signaling to configure the first link includes configuring the relay included in the first link as an L2 relay.

[0462] As an embodiment, both the first link and the second link support RRC transmission.

[0463] As an embodiment, the second link is used to transmit RRC messages of the Uu interface.

[0464] As an embodiment, the second link is an SRB and the first link is a DRB.

[0465] As an embodiment, the second link is used to transmit signaling, and the first link is used to transmit data.

[0466] As an embodiment, the RB types supported by the first link and the second link are different.

[0467] As an embodiment, the first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer; when any condition in a second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer of the sender of the third signaling is in a running state.

[0468] As a sub-embodiment of this embodiment, the third signaling is PC5-RRC signaling.

[0469] As a sub-embodiment of this embodiment, the third signaling is PC5-S signaling.

[0470] As a sub-embodiment of this embodiment, the behavior of accepting the request to activate the opposite RLC bearer of the first RLC bearer includes: the second node U02 activating the opposite RLC bearer of the first RLC bearer.

[0471] As a sub-embodiment of this embodiment, the behavior of accepting the request for activating the opposite RLC bearer of the first RLC bearer includes: the second node U02 forwarding the request for activating the opposite RLC bearer of the first RLC bearer.

[0472] As a sub-embodiment of this embodiment, the behavior accepts a request to activate the opposite RLC bearer of the first RLC bearer, including that the opposite RLC bearer of the first RLC bearer is activated.

[0473] As a sub-embodiment of this embodiment, the first timer includes T304.

[0474] As a sub-embodiment of this embodiment, the first timer includes T310.

[0475] As a sub-embodiment of this embodiment, the first timer includes T312.

[0476] As a sub-embodiment of this embodiment, the first timer includes T316.

[0477] As a sub-embodiment of this embodiment, when the second node U02 starts switching, the first timer is started.

[0478] As a sub-embodiment of this embodiment, when the second node U02 starts to perform conditional reconfiguration, the first timer is started.

[0479] As a sub-embodiment of this embodiment, when a radio link failure occurs in the second node U02, the first timer is started.

[0480] As a sub-embodiment of this embodiment, when the second node U02 starts to update its identity, the first timer is started.

[0481] As an embodiment, the first status report is used to indicate a PDCP SDU received via the first link.

[0482] As an embodiment, the first status report includes a PDCP status report.

[0483] As an embodiment, the first status report includes an RLC status report.

[0484] As an embodiment, the first status report is used to retransmit data on the first RLC bearer.

[0485] As an embodiment, the first RLC bearer is in AM mode or UM mode.

[0486] As an embodiment, the first status report includes a first bitmap, each bit in the first bitmap corresponds to a PDCP SDU, and the first bit is any bit in the first bitmap; the first bit is 0, indicating that the PDCP SDU corresponding to the bit is not received correctly; the first bit is 1, indicating that the PDCP SDU corresponding to the bit is received correctly.

[0487] As an embodiment, the first status report includes a first bitmap, each bit in the first bitmap corresponds to a PDCP SDU, and the first bit is any bit in the first bitmap; the first bit is 0, indicating that the PDCP SDU corresponding to the bit is correctly received; the first bit is 1, indicating that the PDCP SDU corresponding to the bit is not correctly received.

[0488] As an embodiment, the opposite RLC bearer of the first RLC bearer is maintained by the second node.

[0489] As a sub-embodiment of this embodiment, the second node manages the opposite RLC bearer of the first RLC bearer.

[0490] As a sub-embodiment of this embodiment, the second node establishes a peer RLC bearer of the first RLC bearer.

[0491] As a sub-embodiment of this embodiment, the second node controls the opposite RLC bearer of the first RLC bearer.

[0492] As an embodiment, the third signaling is feedback of the first message.

[0493] As an embodiment, after the second node U02 receives the first message, the second node U02 is triggered to send the third signaling.

[0494] Example 6

[0495] Embodiment 6 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in the attached Figure 6 Attached Figure 6In the example, U11 corresponds to the first node of the present application, U12 corresponds to the second node of the present application, and U13 corresponds to the third node of the present application. It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in the present application, wherein the steps in F61 and F62 are optional. For the steps required in Example 6 but not shown in detail, please refer to Example 5.

[0496] for First node U11 , receiving the second signaling in step S6101; receiving the first signaling in step S6102; sending the first message in step S6103; receiving the third signaling in step S6104.

[0497] for Second node U12 , receiving the fifth signaling in step S6201; receiving the first message in step S6202; receiving the fifth message in step S6203; receiving the sixth signaling in step S6204; and sending the third signaling in step S6205.

[0498] for The third node U13 , sending the fifth signaling in step S6301; sending the second signaling in step S6302; sending the first signaling in step S6303; receiving the fifth message in step S6304; and sending the sixth signaling in step S6305.

[0499] As an embodiment, the first node U11 is a UE.

[0500] As an embodiment, the first node U11 is a remote UE.

[0501] As an embodiment, the first node U12 is a UE.

[0502] As an embodiment, the first node U12 is a relay.

[0503] As an embodiment, the third node U13 is a service cell of the first node U11.

[0504] As an embodiment, the third node U13 is the primary service cell of the first node U11.

[0505] As an embodiment, the third node U13 is a service cell of the second node U12.

[0506] As an embodiment, the third node U13 is the primary service cell of the second node U12.

[0507] As an embodiment, the first RLC bearer is a bearer of a PC5 interface.

[0508] As an embodiment, the first RLC bearer is the RLC bearer between the first node U11 and the second node U12, the second RLC bearer is the RLC bearer between the second node U12 and the third node U13, and the second RLC bearer is associated with the first wireless bearer; the opposite RLC bearer of the first RLC bearer is the second RLC bearer.

[0509] As an embodiment, the first wireless bearer is associated with the first RLC bearer and the second RLC bearer at the same time; the first RLC bearer is the RLC bearer between the first node U11 and the second node U12; the second RLC bearer is the RLC bearer between the second node U12 and the third node U13; the second RLC bearer is the opposite RLC bearer of the first RLC bearer.

[0510] As an embodiment, the first node U11 requests the third node U13 to establish a communication link, and the communication nodes of the communication link include the first node U11, the second node U12 and the third node U13.

[0511] As a sub-embodiment of this embodiment, the fifth signaling indicates the part between the second node U12 and the third node U13 of establishing the communication link; the part between the second node U12 and the third node U13 includes the second RLC bearer.

[0512] As a sub-embodiment of this embodiment, the fifth signaling indicates establishment of the second RLC bearer.

[0513] As a sub-embodiment of this embodiment, the fifth signaling is used to configure the second RLC bearer.

[0514] As a sub-embodiment of this embodiment, the fifth signaling configuration establishes a mode of the second RLC bearer.

[0515] As a sub-embodiment of this embodiment, the fifth signaling configuration establishes the length of the sequence number of the second RLC bearer.

[0516] As an embodiment, in response to receiving the fifth signaling, the second node U12 establishes an opposite RLC bearer of the first RLC bearer, and sets the opposite RLC bearer of the first RLC bearer to an inactive state.

[0517] As an embodiment, in response to receiving the fifth signaling, the second node U12 establishes the second RLC bearer and sets the second RLC bearer to an inactive state.

[0518] As an embodiment, the fifth signaling indicates that the second RLC bearer is associated with the first radio bearer.

[0519] As an embodiment, the fifth signaling includes RRCReconfiguration.

[0520] As an embodiment, the fifth signaling includes RRCReconfigurationNR.

[0521] As an embodiment, the fifth signaling includes RRCReconfigurationSidelink.

[0522] As an embodiment, the fifth signaling includes the drb-Identity of the first radio bearer.

[0523] As an embodiment, the fifth signaling includes the srb-Identity of the first radio bearer.

[0524] As an embodiment, the fifth signaling includes the identity of the first RLC bearer.

[0525] As an embodiment, the fifth signaling includes RLC-BearerConfig.

[0526] As an embodiment, the fifth signaling indicates that the second RLC bearer is related to the first node U11.

[0527] As an embodiment, the second signaling indicates the L3 relay configuration of the first link; when the first link and the second link fail at the same time, the first node U11 applies the second signaling to configure the first link; when the first link fails and the second link does not fail, the first node U11 applies the first signaling to configure the first link; wherein the first signaling indicates the L2 relay configuration of the first link; the communication nodes on the second link include the first node U11 and the primary service cell of the first node U11.

[0528] As an embodiment, the first link includes the first radio bearer.

[0529] As an embodiment, the first link includes the first RLC bearer.

[0530] As an embodiment, the communication nodes on the first link include the first node U11, the second node U12 and the third node U13.

[0531] As an embodiment, the communication node on the second link does not include the second node U12.

[0532] As an embodiment, the second link is an SRB and the first link is a DRB.

[0533] As an embodiment, the fifth message requests activation of the opposite RLC bearer of the first RLC bearer.

[0534] As an embodiment, the fifth message requests activation of the second RLC bearer.

[0535] As an embodiment, the third node U13 instructs the first node U11 to set the RLC bearer associated with the second link to an inactive state.

[0536] As an embodiment, the fifth message is an RRC message.

[0537] As an embodiment, the fifth message is an RRC message of the Uu interface.

[0538] As an embodiment, the first message is used to trigger the sending of the fifth message.

[0539] As an embodiment, the fifth message is used to trigger the sixth signaling, and the sixth signaling is RRC signaling.

[0540] As an embodiment, the sixth signaling indicates acceptance of the request for activating the opposite end RLC bearer of the first RLC bearer.

[0541] As an embodiment, the sixth signaling indicates a rejection of a request to activate the opposite RLC bearer of the first RLC bearer.

[0542] As an embodiment, the first message is used to trigger the third signaling.

[0543] As an embodiment, the third signaling is PC5 signaling.

[0544] As an embodiment, the third signaling indicates acceptance of the request for activating the opposite RLC bearer of the first RLC bearer.

[0545] As an embodiment, the third signaling indicates a rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

[0546] As an embodiment, when the sixth signaling indicates a rejection of the request to activate the opposite RLC bearer of the first RLC bearer, the third signaling indicates a rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

[0547] As an embodiment, the sixth signaling is used to generate the third signaling.

[0548] As an embodiment, when any condition in the second condition set is met, the third signaling indicates a rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer is in a running state.

[0549] As a sub-embodiment of this embodiment, when the sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, and when any condition in the second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

[0550] As an embodiment, when all conditions in the second condition set are not satisfied, the second node U12 sends the fifth message.

[0551] As an embodiment, the second condition set includes that the second node U12 is performing conditional reconfiguration.

[0552] As an embodiment, the second condition set includes that the second node U12 is performing conditional serving cell modification.

[0553] As an embodiment, the second condition set includes that the second node U12 is performing conditional service cell deletion.

[0554] As an embodiment, the second condition set includes that the second node U12 is performing conditional serving cell addition.

[0555] As an embodiment, the second condition set includes that the second node U12 is performing conditional primary serving cell modification.

[0556] As an embodiment, the second condition set includes that the second node U12 is performing conditional primary service cell deletion.

[0557] As an embodiment, the second condition set includes that the second node U12 is performing conditional primary serving cell addition.

[0558] As an embodiment, the second condition set includes that the second RLC bearer has changed.

[0559] As an embodiment, the second condition set includes that the second RLC bearer has been deleted.

[0560] As an embodiment, the fifth message indicates that the first link fails.

[0561] As an embodiment, the fifth message indicates that the first link is unavailable.

[0562] As an embodiment, the fifth message indicates that the second link fails.

[0563] As an embodiment, the fifth message indicates that a radio link failure occurs in the first node U11.

[0564] As an embodiment, the fifth message includes a measurement report of the first node U11.

[0565] Example 7

[0566] Embodiment 7 illustrates a schematic diagram of a network structure according to an embodiment of the present invention, as shown in the attached figure. Figure 7 shown.

[0567] In Example 7, the solid line with an arrow indicates that a communication link may exist between nodes. The 3a node corresponds to the third node of the present application, the 1a node corresponds to the first node of the present application, and the 2a node corresponds to the second node of the present application.

[0568] As an embodiment, the 2ath node is a relay node of the 1ath node; and the 3ath node is a service cell of the 1ath node.

[0569] As an embodiment, the first RLC bearer is an RLC bearer between the 1a node and the 2a node.

[0570] As an embodiment, the 2a-th node provides L2 relay service to the 1a-th node.

[0571] As an embodiment, the 2a-th node provides L3 relay service to the 1a-th node.

[0572] As an embodiment, the communication interface between the 2a-th node and the 1a-th node is a PC5 interface.

[0573] As an embodiment, the opposite RLC bearer of the first RLC bearer is maintained by the 2a-th node.

[0574] As an embodiment, one end RLC bearer of the first RLC bearer is maintained by the 1a-th node.

[0575] As an embodiment, the first RLC bearer is terminated at the 1ath node and the 2ath node.

[0576] As an embodiment, the sender of the first signaling is the 3ath node.

[0577] As an embodiment, the recipient of the first message is the 2a-th node, and the first message includes the identity of the 2a-th node.

[0578] As an embodiment, the recipient of the first message is the 2a-th node, and the first message is transmitted through a dedicated channel between the 1a-th node and the 2a-th node.

[0579] As an embodiment, the first radio bearer is associated with the first RLC bearer, and the first radio bearer is terminated at the 1a node and the 2a node.

[0580] As an embodiment, the first radio bearer is associated with the first RLC bearer, and the first radio bearer is terminated at the 1a node and the 3a node.

[0581] As an embodiment, the first link is a link between the 1ath node and the 3ath node.

[0582] As a sub-embodiment of this embodiment, the first link includes a beam.

[0583] As a sub-embodiment of this embodiment, the first link is determined by a reference signal sent by the node 3a.

[0584] As a sub-embodiment of this embodiment, the first link includes a physical layer link.

[0585] As a sub-embodiment of this embodiment, the first link includes a MAC layer connection.

[0586] As a sub-embodiment of this embodiment, the first link includes an RRC connection.

[0587] As a sub-embodiment of this embodiment, the first link includes the PDCP connection.

[0588] As a sub-embodiment of this embodiment, the first link includes the first radio bearer.

[0589] As a sub-embodiment of this embodiment, the first link includes an RLC bearer associated with the first radio bearer between the node 1a and the node 3a.

[0590] As an embodiment, after the node 2a receives the first message, the RLC bearer between the node 2a and the node 3a associated with the first radio bearer is activated.

[0591] As a sub-embodiment of this embodiment, the reception of the first message is used to trigger the 2a node to activate or request activation of the RLC bearer between the 2a node and the 3a node associated with the first radio bearer.

[0592] As a sub-embodiment of this embodiment, activation or request for activation of the first RLC bearer is used to trigger the 2a node to activate or request activation of the RLC bearer between the 2a node and the 3a node associated with the first radio bearer.

[0593] As a sub-embodiment of this embodiment, activation of the first RLC bearer includes setting the first RLC bearer to an active state.

[0594] As a sub-embodiment of this embodiment, activation of the RLC bearer between the 2a node and the 3a node associated with the first radio bearer includes setting the RLC bearer between the 2a node and the 3a node associated with the first radio bearer to an active state.

[0595] As an embodiment, the first message is used to instruct the 2ath node to activate the first RLC bearer.

[0596] As an embodiment, the first message is used to instruct the node 2a to activate the part of the first RLC bearer maintained by the node 2a.

[0597] Example 8

[0598] Embodiment 8 illustrates a schematic diagram of a network structure according to an embodiment of the present invention, as shown in the attached figure. Figure 8 shown.

[0599] In Example 8, the solid line with an arrow indicates that a communication link may exist between nodes. Node 3b corresponds to the third node of the present application, node 1b corresponds to the first node of the present application, node 2b is a relay node, and node 2c corresponds to the second node of the present application.

[0600] As an embodiment, the 2c node is a relay node of the 1b node; and the 3b node is a service cell of the 1b node.

[0601] As a sub-embodiment of this embodiment, the node 3b is the primary serving cell of the node 1b.

[0602] As an embodiment, the first radio bearer is terminated at the first 1b node and the 3b node.

[0603] As an embodiment, the first radio bearer is a radio bearer between the 1b node and the 3b node.

[0604] As an embodiment, the sender of the first signaling is the 3b-th node.

[0605] As an embodiment, the sender of the first signaling is the 2c node.

[0606] As an embodiment, the 2c-th node broadcasts discovery information.

[0607] As an embodiment, the 2c-th node broadcasts the fourth signaling.

[0608] As an embodiment, the 2c-th node periodically broadcasts the fourth signaling.

[0609] As an embodiment, the 2cth node is the group header or cluster header of the 1bth node.

[0610] As an embodiment, the 2b-th node is the group header or cluster header of the 1b-th node.

[0611] As an embodiment, the first RLC bearer is an RLC bearer between the 2c node and the 1b node.

[0612] As an embodiment, the first RLC bearer is terminated at the first 1b node and the 2c node.

[0613] As an embodiment, the second RLC bearer is an RLC bearer between the 3b node and the 2c node.

[0614] As an embodiment, the second RLC bearer is terminated at the 3b node and the 2c node.

[0615] As an embodiment, the second RLC bearer and the first RLC bearer are both associated with the first radio bearer.

[0616] As an embodiment, the second RLC bearer is the opposite RLC bearer of the first RLC bearer.

[0617] As an embodiment, the nodes communicating on the first link include the first 1b node and the 3b node.

[0618] As an embodiment, the nodes communicating on the first link include the first 1b node, the 3b node, and the 2b node.

[0619] As an embodiment, the first link includes a link between the first 1b node and the 3b node and a link between the 2b node and the 3b node.

[0620] As an embodiment, the first link failure includes a failure between the 1b node and the 2b node.

[0621] As a sub-embodiment of this embodiment; the first link failure includes a wireless link failure.

[0622] As a sub-embodiment of this embodiment; the first link failure includes beam failure.

[0623] As a sub-embodiment of this embodiment; the first link failure includes a link failure between the 1b node and the 2b node.

[0624] As an embodiment, the first condition set includes that the link quality of the first link is lower than a given threshold, and the serving cell of the node 1b indicates the given threshold.

[0625] As an embodiment, the first link failure includes a failure between the 3b node and the 2b node.

[0626] As an embodiment, the first link includes a wireless link from the 3b node directly to the 1b node.

[0627] As a sub-embodiment of this embodiment, the failure of the wireless link between the node 3b and the node 1b directly includes that the node 1b is out of coverage.

[0628] As an embodiment, the second link includes a link directly connected between the 1b node and the 3b node.

[0629] As an embodiment, the second link includes a link between the 1b node and the 3b node relayed by the 2b node.

[0630] As an embodiment, the second link includes a link for transmitting RRC signaling.

[0631] As an embodiment, the second link includes an RRC connection between the 1b node and the 3b node.

[0632] As an embodiment, the second link includes an SRB between the 1b-th node and the 3b-th node.

[0633] As an embodiment, the first message is used to trigger the 2c node to send the fifth message.

[0634] Example 9

[0635] Embodiment 9 illustrates a schematic diagram of a network structure according to an embodiment of the present invention, as shown in the attached figure. Fig. 9 shown.

[0636] In Example 9, the solid line with an arrow indicates that a communication link may exist between nodes. The 3cth node corresponds to the third node of the present application, the 1cth node corresponds to the first node of the present application; and the 2dth node corresponds to the second node of the present application.

[0637] As an embodiment, the 1cth node is a relay node of the 2dth node.

[0638] As an embodiment, the 3cth node is the service cell of the 2dth node.

[0639] As a sub-embodiment of this embodiment, the 3cth node is the primary service cell of the 2dth node.

[0640] As an embodiment, the 3c node is a service cell of the 1c node.

[0641] As a sub-embodiment of this embodiment, the 3c-th node is the primary serving cell of the 1c-th node.

[0642] As an embodiment, the first wireless bearer is terminated at the 2dth node and the 3cth node.

[0643] As an embodiment, the first radio bearer is a radio bearer between the 2d node and the 3c node.

[0644] As an embodiment, the sender of the first signaling is the 3c node.

[0645] As an embodiment, the opposite end bearer of the first RLC bearer is maintained by the 3c node.

[0646] As an embodiment, the opposite end bearer of the first RLC bearer is the part of the first RLC bearer maintained by the 3c node on the 3c node.

[0647] As an embodiment, the first link is a wireless link between the 2dth node and the 3cth node.

[0648] As an embodiment, the first link is the bearer between the 2dth node and the 3cth node.

[0649] As an embodiment, the first link is an RLC bearer between the 2dth node and the 3cth node.

[0650] As an embodiment, the first link is a physical layer link between the 2dth node and the 3cth node.

[0651] As an embodiment, the first link is an RRC connection between the 2dth node and the 3cth node.

[0652] As an embodiment, when the first wireless link fails, the 2dth node sends a first request.

[0653] As a sub-embodiment of this embodiment, the recipient of the first request is the 1cth node.

[0654] As a sub-embodiment of this embodiment, the first request includes the identity of the 1c-th node.

[0655] As a sub-embodiment of this embodiment, the first request is sent via a unicast link between the 2dth node and the 1cth node.

[0656] As a sub-embodiment of this embodiment, the first request is sent via a dedicated link between the 2dth node and the 1cth node.

[0657] As a sub-embodiment of this embodiment, the header carrying the first request MAC PDU indicates the identity of the 1c-th node.

[0658] As a sub-embodiment of this embodiment, the first MAC PDU carries the first request; the header of the first MAC PDU and the SCI that schedules the first MAC PDU jointly indicate the identity of the 1c node.

[0659] As an embodiment, the first request is used to request activation of the first RLC bearer.

[0660] As an embodiment, the third signaling is used to feedback the first request.

[0661] As an embodiment, the first request includes a PC5 message.

[0662] As an embodiment, the first request includes PC5 data.

[0663] As an embodiment, the first request includes PC5-RRC signaling.

[0664] As an embodiment, the first request includes PC5-S signaling.

[0665] As an embodiment, the first request includes RRCReconfigurationSidelink.

[0666] As an embodiment, the first request is used to indicate that the first link has failed.

[0667] Example 10

[0668] Embodiment 10 illustrates a schematic diagram of a protocol stack according to an embodiment of the present invention, as shown in the attached Fig.10 Embodiment 10 is based on Embodiment 3 and shows a control plane protocol stack related to a relay node.

[0669] In Example 10, NAS is the non-access layer, Uu-RRC is the RRC protocol of the Uu interface, Uu-PDCP is the PDCP entity of the Uu interface; Uu-RLC is the RLC entity of the Uu interface, Uu-MAC is the MAC entity of the Uu interface, and Uu-PHY is the physical layer entity of the Uu interface; PC5-RLC is the RLC entity of the PC5 interface; PC5-MAC is the MAC entity of the PC5 interface; PC5-PHY is the physical layer entity of the PC5 interface; Adaptation is the adaptation entity between the relay node and the network; N2Stack is the protocol stack of the N2 interface, and the N2 interface is the interface between the gNB and the core network.

[0670] As an embodiment, the UE corresponds to the first node of the present application, the relay corresponds to the second node of the present application, and the gNB corresponds to the third node of the present application.

[0671] As a sub-embodiment of this embodiment, the first radio bearer is a radio bearer between the UE and the gNB.

[0672] As a sub-embodiment of this embodiment, the first RLC bearer is an RLC bearer of a PC5 interface, and the first RLC bearer is an RLC bearer between the UE and the relay.

[0673] As a sub-embodiment of this embodiment, the first RLC bearer is associated with the PC5-RLC entity of the UE and the PC5-RLC entity of the relay.

[0674] As a sub-embodiment of this embodiment, the first RLC is carried at one end of the UE and includes a PC5-RLC entity of the UE.

[0675] As a sub-embodiment of this embodiment, the first RLC bearer at one end of the relay is a peer RLC bearer of the first RLC bearer, and the first RLC bearer at one end of the relay includes a PC5-RLC entity of the relay.

[0676] As an embodiment, the UE corresponds to the first node of the present application, the relay corresponds to the second node of the present application, and the gNB corresponds to the third node of the present application.

[0677] As a sub-embodiment of this embodiment, the first radio bearer is a radio bearer between the UE and the gNB.

[0678] As a sub-embodiment of this embodiment, the first RLC bearer is an RLC bearer of a PC5 interface, and the first RLC bearer is an RLC bearer between the UE and the relay.

[0679] As a sub-embodiment of this embodiment, the first RLC bearer is associated with the PC5-RLC entity of the UE and the PC5-RLC entity of the relay.

[0680] As a sub-embodiment of this embodiment, the second RLC bearer is an RLC bearer between the relay and the gNB.

[0681] As a sub-embodiment of this embodiment, the second RLC bearer is associated with the Uu-RLC entity of the relay and the Uu-RLC entity of the gNB.

[0682] As a sub-embodiment of this embodiment, the second RLC bearer is associated with the first radio bearer.

[0683] As a sub-embodiment of this embodiment, the second RLC bearer is the opposite RLC bearer of the first RLC bearer.

[0684] As an embodiment, the UE corresponds to the second node of the present application, the relay corresponds to the first node of the present application, and the gNB corresponds to the third node of the present application.

[0685] As a sub-embodiment of this embodiment, the first RLC bearer is an RLC bearer between the relay and the gNB.

[0686] As a sub-embodiment of this embodiment, the first RLC bearer includes the Uu-RLC entity of the relay and the Uu-RLC entity of the gNB.

[0687] As a sub-embodiment of this embodiment, one end of the first RLC bearer is maintained by the relay; the other end of the first RLC bearer is maintained by the gNB.

[0688] As a sub-embodiment of this embodiment, the opposite RLC bearer of the first RLC bearer is maintained by the gNB.

[0689] As a sub-embodiment of this embodiment, the opposite RLC bearer of the first RLC bearer includes the Uu-RLC entity of the gNB.

[0690] Embodiment 11

[0691] Embodiment 11 illustrates a structural block diagram of a processing device used in a first node according to an embodiment of the present application; Fig.11 As shown in the attached Fig.11 In the embodiment, the processing device 1100 in the first node includes a first receiver 1101, a first transmitter 1102 and a first processor 1103.

[0692] In Example 11,

[0693] The first receiver 1101 receives a first signaling, where the first signaling is used to configure a first RLC bearer to be in an inactive state;

[0694] The first transmitter 1102 sends a first message; the first message is used to request activation of the opposite end RLC bearer of the first RLC bearer;

[0695] The first processor 1103 switches the first RLC bearer to an active state when each condition in the first condition set is satisfied;

[0696] The first RLC bearer is associated to a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling.

[0697] As an embodiment, the first processor 1103, in response to receiving the first signaling, establishes the first RLC bearer and sets the first RLC bearer to an inactive state.

[0698] As an embodiment, the first transmitter 1102 sends a first status report when a first set of conditions is met;

[0699] The first status report is used to indicate the PDCP SDU received through the first link.

[0700] As an embodiment, the first condition set includes the first node entering an RRC idle state.

[0701] As an embodiment, the first receiver 1101 receives a second message, the sender of the second message is a second node; the counterpart RLC bearer of the first RLC bearer is maintained by the second node, and the second message indicates at least the latter of the RRC state of the second node and the service cell where the second node resides.

[0702] As an embodiment, the first receiver 1101 receives second signaling, where the second signaling indicates an L3 relay configuration of the first link;

[0703] The first transmitter 1102, when the first link and the second link fail at the same time, the first transmitter applies the second signaling to configure the first link; when the first link fails and the second link does not fail, the first transmitter applies the first signaling to configure the first link;

[0704] The first signaling indicates the L2 relay configuration of the first link; and the communication nodes on the second link include the first node and the primary serving cell of the first node.

[0705] As an embodiment, the first receiver 1101 receives a third signaling;

[0706] Among them, the first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer; when any condition in the second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer of the sender of the third signaling is in a running state.

[0707] As an embodiment, the first receiver 1101 receives a fourth signaling, wherein the fourth signaling indicates a first cell, and the first cell is the primary service cell of the second node; the fourth signaling indicates a first reception quality, and the first reception quality is the link quality between the second node and the first cell.

[0708] As an embodiment, the first node is a user equipment (UE).

[0709] As an embodiment, the first node is a terminal supporting a large delay difference.

[0710] As an embodiment, the first node is a terminal supporting NTN.

[0711] As an embodiment, the first node is an aircraft.

[0712] As an embodiment, the first node is a vehicle-mounted terminal.

[0713] As an embodiment, the first node is a relay.

[0714] As an embodiment, the first node is a vessel.

[0715] As an embodiment, the first node is an Internet of Things terminal.

[0716] As an embodiment, the first node is an industrial Internet of Things terminal.

[0717] As an embodiment, the first node is a device supporting low-latency and high-reliability transmission.

[0718] As an embodiment, the first receiver 1101 includes at least one of the antenna 452, receiver 454, receiving processor 456, multi-antenna receiving processor 458, controller / processor 459, memory 460, or data source 467 in Example 4.

[0719] As an embodiment, the first transmitter 1102 includes at least one of the antenna 452, transmitter 454, transmit processor 468, multi-antenna transmit processor 457, controller / processor 459, memory 460, or data source 467 in Embodiment 4.

[0720] Example 12

[0721] Embodiment 12 illustrates a structural block diagram of a processing device used in a second node according to an embodiment of the present application; Fig.12 As shown in the attached Fig.12 In the embodiment, the processing device 1200 in the second node includes a second transmitter 1201 and a second receiver 1202 and a second processor 1203.

[0722] In Example 12,

[0723] The second receiver 1202 receives a first message, where the first message is used to request activation of a peer RLC bearer of the first RLC bearer;

[0724] The second processor 1203 sets the opposite RLC bearer of the first RLC bearer to an active state;

[0725] Wherein, when each condition in the first condition set is satisfied, the sender of the first message sends the first message;

[0726] The first RLC bearer is associated to a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, the communication nodes on the first link include a first node, and a primary service cell of the first node and at least one of the second node.

[0727] As an embodiment, the second receiver 1202 receives the fifth signaling, and in response to receiving the fifth signaling, the second processor 1203 establishes a peer RLC bearer of the first RLC bearer, and sets the peer RLC bearer of the first RLC bearer to an inactive state.

[0728] As an embodiment, the second transmitter 1201 sends a fifth message, wherein the fifth message requests activation of the opposite RLC bearer of the first RLC bearer.

[0729] As an embodiment, the first condition set includes the sender of the first message entering the RRC idle state.

[0730] As an embodiment, the second transmitter 1201 sends a second message, the opposite RLC bearer of the first RLC bearer is maintained by the second node, and the second message indicates at least the latter of the RRC state of the second node and the service cell where the second node resides.

[0731] As an embodiment, the second transmitter 1201 sends a third signaling;

[0732] Among them, the first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer; when any condition in the second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer is in a running state.

[0733] As an embodiment, the second transmitter 1201 sends a fourth message, where the fourth message indicates a first reception quality, where the first reception quality is a link quality from the second node to a primary service cell of the second node.

[0734] As an embodiment, the second receiver 1202 receives sixth signaling;

[0735] The sixth signaling is RRC signaling; the sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the sixth signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

[0736] As an embodiment, the second node is a base station.

[0737] As an embodiment, the second node is a satellite.

[0738] As an embodiment, the second node is a UE (User Equipment).

[0739] As an embodiment, the second node is a gateway.

[0740] As an embodiment, the second node is a base station supporting a large delay difference.

[0741] As an embodiment, the first receiver 1202 includes at least one of the antenna 452, receiver 454, receiving processor 456, multi-antenna receiving processor 458, controller / processor 459, memory 460, or data source 467 in Embodiment 4.

[0742] As an embodiment, the first transmitter 1201 includes at least one of the antenna 452, transmitter 454, transmit processor 468, multi-antenna transmit processor 457, controller / processor 459, memory 460, or data source 467 in Embodiment 4.

[0743] Example 13

[0744] Embodiment 13 illustrates a structural block diagram of a processing device used in a third node according to an embodiment of the present application; Fig.13 As shown in the attached Fig.13 In the embodiment 13, the processing device 1300 in the third node includes a third transmitter 1301 and a third receiver 1302.

[0745] The third transmitter 1301 sends a first signaling, wherein the first signaling is used to configure the first RLC bearer to be in an inactive state;

[0746] Wherein, when each condition in the first condition set is met, the receiver of the first signaling sends the first message; the first message is used to request activation of the opposite end RLC bearer of the first RLC bearer;

[0747] In which, when each condition in the first condition set is met, the recipient of the first signaling switches the first RLC bearer to an active state and sends the first message; the first RLC bearer is associated with a first wireless bearer; the first wireless bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the third node.

[0748] As an embodiment, the third receiver 1302 receives a first status report;

[0749] The first status report is used to indicate the PDCP SDU received through the first link.

[0750] As an embodiment, the first condition set includes the recipient of the first signaling entering an RRC idle state.

[0751] As an embodiment, the third transmitter 1301 sends a second signaling, where the second signaling indicates an L3 relay configuration of the first link;

[0752] When the first link and the second link fail at the same time, the receiver of the first signaling applies the second signaling to configure the first link; when the first link fails and the second link does not fail, the receiver of the first signaling applies the first signaling to configure the first link;

[0753] The first signaling indicates the L2 relay configuration of the first link; and the communication nodes on the second link include the receiver of the first signaling and the three nodes.

[0754] As an embodiment, the third receiver 1302 receives a fourth message, where the fourth message indicates a first reception quality, where the first reception quality is a link quality from a second node to a primary service cell of the second node.

[0755] As an embodiment, the third transmitter 1301 sends a fourth signaling, wherein the fourth signaling indicates a first cell, which is a primary service cell of a second node; the fourth signaling indicates a first reception quality, which is a link quality between the second node and the first cell.

[0756] As an embodiment, the third receiver 1302 receives a fifth message, wherein the fifth message requests activation of the opposite RLC bearer of the first RLC bearer.

[0757] As an embodiment, the third transmitter 1301 sends a sixth signaling;

[0758] The fifth message is used to trigger the sixth signaling, and the sixth signaling is RRC signaling; the sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the sixth signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

[0759] As an embodiment, the third receiver 1302 receives the fifth signaling, establishes the opposite RLC bearer of the first RLC bearer as a response to receiving the fifth signaling, and sets the opposite RLC bearer of the first RLC bearer to an inactive state.

[0760] As an embodiment, the third node is a base station.

[0761] As an embodiment, the third node is a satellite.

[0762] As an embodiment, the third node is a relay.

[0763] As an embodiment, the third node is a UE (User Equipment).

[0764] As an embodiment, the third node is a gateway.

[0765] As an embodiment, the third node is a base station supporting a large delay difference.

[0766] As an embodiment, the third transmitter 1301 includes at least one of the antenna 420, transmitter 418, transmit processor 416, multi-antenna transmit processor 471, controller / processor 475, and memory 476 in Embodiment 4.

[0767] As an embodiment, the third receiver 1302 includes at least one of the antenna 420, the receiver 418, the receiving processor 470, the multi-antenna receiving processor 472, the controller / processor 475, and the memory 476 in Embodiment 4.

[0768] A person of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module unit in the above embodiment can be implemented in the form of hardware or in the form of a software function module, and the present application is not limited to any specific form of software and hardware combination. The user equipment, terminal and UE in the present application include but are not limited to drones, communication modules on drones, remote-controlled aircraft, aircraft, small aircraft, mobile phones, tablet computers, notebooks, vehicle-mounted communication equipment, wireless sensors, Internet cards, Internet of Things terminals, RFID terminals, NB-IoT terminals, MTC (Machine Type Communication, machine type communication) terminals, eMTC (enhanced MTC, enhanced MTC) terminals, data cards, Internet cards, vehicle-mounted communication equipment, low-cost mobile phones, low-cost tablet computers, satellite communication equipment, ship communication equipment, NTN user equipment and other wireless communication equipment. The base stations or system equipment in this application include but are not limited to macrocell base stations, microcell base stations, home base stations, relay base stations, gNB (NR Node B) NR Node B, TRP (Transmitter Receiver Point), NTN base stations, satellite equipment, flight platform equipment and other wireless communication equipment, eNB (LTE Node B), test equipment, such as transceiver devices that simulate some functions of base stations, signaling testers, etc.

[0769] The above is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A first node for wireless communication, wherein: include: A first receiver receives a first signaling, where the first signaling is used to configure a first RLC bearer to be in an inactive state; A first transmitter sends a first message; The first message is used to request activation of the opposite RLC bearer of the first RLC bearer; a first processor, switching the first RLC bearer to an active state when each condition in a first condition set is satisfied; The first RLC bearer is associated with a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling; The first node is a user equipment (UE); the first link failure includes a radio link failure.

2. The first node according to claim 1, characterized in that: The first link includes a beam; and the first link failure includes a beam failure.

3. The first node according to claim 1 or 2, characterized in that: include: The first transmitter sends a first status report when a first set of conditions is met; The first status report is used to indicate the PDCP SDU received through the first link.

4. The first node according to any one of claims 1 to 3, characterized in that: The first condition set includes the first node entering an RRC idle state.

5. The first node according to any one of claims 1 to 4, characterized in that: include: The first receiver receives a second message, the sender of the second message is a second node; the opposite RLC bearer of the first RLC bearer is maintained by the second node, the second message indicates the service cell where the second node resides, or the second message indicates the RRC state of the second node and the service cell where the second node resides.

6. The first node according to any one of claims 1 to 5, characterized in that: include: The first receiver receives second signaling, where the second signaling indicates an L3 relay configuration of the first link; the first transmitter, when the first link and the second link fail at the same time, the first transmitter applies the second signaling to configure the first link; When the first link fails and the second link does not fail, the first transmitter applies the first signaling to configure the first link; The first signaling indicates the L2 relay configuration of the first link; and the communication nodes on the second link include the first node and the primary serving cell of the first node.

7. The first node according to any one of claims 1 to 6, characterized in that: include: The first receiver receives a third signaling; Among them, the first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer; when any condition in the second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer of the sender of the third signaling is in a running state.

8. The first node according to any one of claims 1 to 7, characterized in that: The first node receives the first signaling from a third node; the first node sends the first message to the second node; the opposite RLC bearer of the first RLC bearer is maintained by the second node; The third node is a primary serving cell of the first node.

9. A second node for wireless communication, wherein: include: A second receiver receives a first message, where the first message is used to request activation of a peer RLC bearer of the first RLC bearer; The second processor sets the opposite RLC bearer of the first RLC bearer to an active state; Wherein, when each condition in the first condition set is satisfied, the sender of the first message sends the first message; Among them, the first RLC bearer is associated to the first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, the communication nodes on the first link include a first node, and, a primary service cell of the first node and at least one of the second node; the sender of the first message is a user equipment; the first link failure includes a radio link failure.

10. The second node according to claim 9, characterized in that: include: The second receiver receives a fifth signaling as a response to receiving the fifth signaling; The second processor establishes an opposite RLC bearer of the first RLC bearer, and sets the opposite RLC bearer of the first RLC bearer to an inactive state.

11. The second node according to claim 9 or 10, characterized in that: include: The second transmitter sends a fifth message, wherein the fifth message requests activation of the opposite RLC bearer of the first RLC bearer.

12. The second node according to any one of claims 9 to 11, characterized in that: The first condition set includes the sender of the first message entering the RRC idle state.

13. The second node according to any one of claims 9 to 12, characterized in that: include: The second transmitter sends a second message, wherein the opposite RLC bearer of the first RLC bearer is maintained by the second node, and the second message indicates the service cell where the second node resides, or the second message indicates the RRC state of the second node and the service cell where the second node resides.

14. The second node according to any one of claims 9 to 13, characterized in that: include: A second transmitter sends a third signaling; Among them, the first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer; when any condition in the second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer is in a running state.

15. The second node according to any one of claims 11, 13 or 14, characterized in that: include: The second transmitter sends a fourth message, where the fourth message indicates a first reception quality, where the first reception quality is a link quality from the second node to a primary serving cell of the second node.

16. The second node according to any one of claims 9 to 15, characterized in that: include: The second receiver receives a sixth signaling; Wherein, the sixth signaling is RRC signaling; The sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the sixth signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

17. A third node for wireless communication, wherein: include: A third transmitter sends a first signaling; The first signaling is used to configure the first RLC bearer to be in an inactive state; Wherein, when each condition in the first condition set is met, the receiver of the first signaling sends a first message; the first message is used to request activation of the opposite end RLC bearer of the first RLC bearer; Among them, when each condition in the first condition set is met, the receiver of the first signaling switches the first RLC bearer to an active state and sends the first message; the first RLC bearer is associated with a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the sender of the first message and the third node; the first link failure includes a radio link failure.

18. The third node according to claim 17, characterized in that: include: a third receiver, receiving the first status report; The first status report is used to indicate the PDCP SDU received through the first link.

19. The third node according to claim 17 or 18, characterized in that: The first condition set includes a receiver of the first signaling entering an RRC idle state.

20. The third node according to any one of claims 17 to 19, characterized in that: include: The third transmitter sends a second signaling, where the second signaling indicates an L3 relay configuration of the first link; When the first link and the second link fail at the same time, the receiver of the first signaling applies the second signaling to configure the first link; When the first link fails and the second link does not fail, the receiver of the first signaling applies the first signaling to configure the first link; The first signaling indicates the L2 relay configuration of the first link; and the communication nodes on the second link include the receiver of the first signaling and the three nodes.

21. The third node according to any one of claims 17 to 20, characterized in that: include: The third receiver receives a fourth message, where the fourth message indicates a first reception quality, where the first reception quality is a link quality from a second node to a primary serving cell of the second node.

22. The third node according to any one of claims 17 to 21, characterized in that: include: The third transmitter sends a fourth signaling, where the fourth signaling indicates a first cell, where the first cell is a primary serving cell of the second node; The fourth signaling indicates a first reception quality, where the first reception quality is a link quality between the second node and the first cell.

23. The third node according to any one of claims 17 to 22, characterized in that: include: The third receiver receives a fifth message, wherein the fifth message requests activation of the opposite RLC bearer of the first RLC bearer.

24. The third node according to claim 23, characterized in that: include: The third transmitter sends a sixth signaling; The fifth message is used to trigger the sixth signaling, and the sixth signaling is RRC signaling; The sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the sixth signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

25. The third node according to any one of claims 17 to 24, characterized in that: include: The third receiver receives the fifth signaling, establishes a counterpart RLC bearer of the first RLC bearer as a response to receiving the fifth signaling, and sets the counterpart RLC bearer of the first RLC bearer to an inactive state.

26. A method in a first node for wireless communication, wherein: include: receiving a first signaling, where the first signaling is used to configure a first RLC bearer to be in an inactive state; Sending a first message; The first message is used to request activation of the opposite RLC bearer of the first RLC bearer; When each condition in the first condition set is satisfied, switching the first RLC bearer to an active state; The first RLC bearer is associated with a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the first node and the sender of the first signaling; The first node is a user equipment (UE); the first link failure includes a radio link failure.

27. The method in the first node according to claim 26, characterized in that: The first link includes a beam; and the first link failure includes a beam failure.

28. The method in the first node according to claim 26 or 27, characterized in that: When the first condition set is met, sending a first status report; The first status report is used to indicate the PDCP SDU received through the first link.

29. The method in the first node according to any one of claims 26 to 28, characterized in that: The first condition set includes the first node entering an RRC idle state.

30. The method in the first node according to any one of claims 26 to 29, characterized in that: include: Receive a second message, where the sender of the second message is a second node; the opposite RLC bearer of the first RLC bearer is maintained by the second node, and the second message indicates the service cell where the second node resides, or the second message indicates the RRC state of the second node and the service cell where the second node resides.

31. The method in the first node according to any one of claims 26 to 30, characterized in that: include: receiving second signaling indicating an L3 relay configuration of the first link; When the first link and the second link fail at the same time, applying the second signaling to configure the first link; When the first link fails and the second link does not fail, applying the first signaling to configure the first link; The first signaling indicates the L2 relay configuration of the first link; and the communication nodes on the second link include the first node and the primary serving cell of the first node.

32. The method in the first node according to any one of claims 26 to 31, characterized in that: The method comprises: receiving a third signaling; Among them, the first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer; when any condition in the second condition set is met, the third signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer, and the second condition set includes that the first timer of the sender of the third signaling is in a running state.

33. The method in the first node according to any one of claims 26 to 32, characterized in that: include: The first node receives the first signaling from a third node; The first node sends the first message to the second node; The opposite RLC bearer of the first RLC bearer is maintained by the second node; The third node is a primary serving cell of the first node.

34. A method in a second node for wireless communication, wherein: include: receiving a first message, where the first message is used to request activation of an opposite RLC bearer of the first RLC bearer; Setting the opposite RLC bearer of the first RLC bearer to an active state; Wherein, when each condition in the first condition set is satisfied, the sender of the first message sends the first message; Among them, the first RLC bearer is associated to the first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, the communication nodes on the first link include a first node, and, a primary service cell of the first node and at least one of the second node; the sender of the first message is a user equipment; the first link failure includes a radio link failure.

35. The method in the second node according to claim 34, characterized in that: include: A fifth signaling is received, and as a response to receiving the fifth signaling, an opposite-end RLC bearer of the first RLC bearer is established, and the opposite-end RLC bearer of the first RLC bearer is set to an inactive state.

36. The method in the second node according to claim 34 or 35, characterized in that: include: A fifth message is sent, wherein the fifth message requests activation of the opposite RLC bearer of the first RLC bearer.

37. The method in the second node according to any one of claims 34 to 36, characterized in that: The first condition set includes the sender of the first message entering the RRC idle state.

38. The method in the second node according to any one of claims 34 to 37, characterized in that: include: A second message is sent, wherein the opposite RLC bearer of the first RLC bearer is maintained by the second node, and the second message indicates a serving cell where the second node resides, or the second message indicates an RRC state of the second node and a serving cell where the second node resides.

39. The method in the second node according to any one of claims 34 to 38, characterized in that: include: Sending a third signaling; The first message is used to trigger the third signaling, and the third signaling is PC5 signaling; the third signaling indicates acceptance of a request to activate the opposite RLC bearer of the first RLC bearer, or the third signaling indicates rejection of a request to activate the opposite RLC bearer of the first RLC bearer; When any condition in a second set of conditions is satisfied, the third signaling indicates a rejection of a request to activate the opposite RLC bearer of the first RLC bearer, wherein the second set of conditions includes that a first timer is in a running state.

40. The method in the second node according to any one of claims 34 to 39, characterized in that: include: A fourth message is sent, where the fourth message indicates a first reception quality, where the first reception quality is a link quality from the second node to a primary serving cell of the second node.

41. The method in the second node according to any one of claims 34 to 40, characterized in that: include: receiving a sixth signaling; The sixth signaling is RRC signaling; the sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the sixth signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

42. A method in a third node for wireless communication, wherein: include: Sending a first signaling; The first signaling is used to configure the first RLC bearer to be in an inactive state; Wherein, when each condition in the first condition set is met, the receiver of the first signaling sends a first message; the first message is used to request activation of the opposite end RLC bearer of the first RLC bearer; Among them, when each condition in the first condition set is met, the receiver of the first signaling switches the first RLC bearer to an active state and sends the first message; the first RLC bearer is associated with a first radio bearer; the first radio bearer is in an active state, the first condition set includes a first link failure, and the communication nodes on the first link include the sender of the first message and the third node; the first link failure includes a radio link failure, a beam failure.

43. The method in the third node according to claim 42, characterized in that: include: receiving a first status report; The first status report is used to indicate the PDCP SDU received through the first link.

44. The method in the third node according to claim 42 or 43, characterized in that: include: The first condition set includes a receiver of the first signaling entering an RRC idle state.

45. The method in the third node according to any one of claims 42 to 44, characterized in that: include: sending a second signaling indicating an L3 relay configuration of the first link; When the first link and the second link fail at the same time, the receiver of the first signaling applies the second signaling to configure the first link; When the first link fails and the second link does not fail, the receiver of the first signaling applies the first signaling to configure the first link; The first signaling indicates the L2 relay configuration of the first link; and the communication nodes on the second link include the receiver of the first signaling and the three nodes.

46. ​​The method in the third node according to any one of claims 42 to 45, characterized in that: include: A fourth message is received, the fourth message indicating a first reception quality, the first reception quality being a link quality from a second node to a primary serving cell of the second node.

47. The method in the third node according to any one of claims 42 to 46, characterized in that: include: Sending a fourth signaling, where the fourth signaling indicates a first cell, where the first cell is a primary serving cell of the second node; The fourth signaling indicates a first reception quality, where the first reception quality is a link quality between the second node and the first cell.

48. The method in the third node according to any one of claims 42 to 47, characterized in that: include: A fifth message is received, wherein the fifth message requests activation of an opposite RLC bearer of the first RLC bearer.

49. The method in the third node according to claim 48, characterized in that: include: Sending a sixth signaling; The fifth message is used to trigger the sixth signaling, and the sixth signaling is RRC signaling; the sixth signaling indicates acceptance of the request to activate the opposite RLC bearer of the first RLC bearer, or the sixth signaling indicates rejection of the request to activate the opposite RLC bearer of the first RLC bearer.

50. The method in the third node according to any one of claims 42 to 49, characterized in that: include: A fifth signaling is received, and as a response to receiving the fifth signaling, an opposite-end RLC bearer of the first RLC bearer is established, and the opposite-end RLC bearer of the first RLC bearer is set to an inactive state.

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