A method and apparatus for use in relaying wireless communications

Abstract

The application discloses a method and device used in relaying wireless communication. A first node receives first information through a sidelink; determines a first transmission mode according to at least the first information; and transmits a first bit group using the first transmission mode, the first bit group including at least one bit; wherein the first transmission mode is one of a candidate transmission mode set, the candidate transmission mode set including a transmission through a cellular link and a transmission through the sidelink; the first information is used to indicate a first condition set, the first condition set including at least one condition; and when all conditions in the first condition set are satisfied, the candidate transmission mode set includes the candidate transmission mode of the transmission through the sidelink. The application can reasonably select a small data transmission mode in a relay transmission network architecture, effectively reduce signaling overhead of a relay node, and reduce power consumption of the relay node.

Description

Technical Field

[0001] This application relates to methods and apparatus in wireless communication systems, and more particularly to methods and apparatus for supporting small data transmission in relay wireless communication. Background Technology

[0002] In response to the rapidly developing V2X (Vehicle-to-Everything) services, 3GPP (3rd Generation Partner Project) initiated the development and research of the SL (Sidelink) standard within the New Radio (NR) (or Fifth Generation, 5G) framework. At the 3GPP RAN (Radio Access Network) #86 plenary meeting, it was decided to launch SI (Study Item) standardization work for NR SL Relay. Relay, as a multi-hop transmission technology, can improve throughput and coverage.

[0003] Relay communication is a common method in cellular network communication, where data from the source node reaches the remote node via relay nodes (RNs). The source and remote nodes are typically base station equipment and user equipment (UE), or both UE and base station equipment; the relay node can be either a network device or a UE. Taking secondary link transmission in an LTE (Long Term Evolution) system as an example, transmission from the UE to the relay node uses secondary link air interface technology, while transmission from the relay node to the base station (eNodeB, eNB) uses LTE air interface technology. The RN is used for data forwarding between the UE and the eNB, and can be either IP (Internet Protocol) layer forwarding or Layer 3 relay.

[0004] NR supports the RRC (Radio Resource Control) Inactive state. User Equipment (UE) devices with infrequent (including periodic and aperiodic) data transmission needs are typically configured to reside in the RRC Inactive state when no data transmission is required. When the UE needs data transmission, it transitions from the RRC Inactive state to the RRC Connected state to transmit data, and then re-enters the RRC Inactive state after the data transmission is complete. Until Rel (version)-16, 3GPP did not support data transmission in the RRC Inactive state. For small data transmissions, the signaling overhead of RRC state transitions was greater than the transmission overhead of small data, and it also increased the UE's power consumption. Therefore, at the 3GPP RAN#88e plenary meeting, it was decided to initiate WI (Work Item) standardization work for small data transmission in the RRC Inactive state. Summary of the Invention

[0005] The inventors discovered through research that in L2 (Layer 2) UE-to-Network relay communication, the source node (for uplink transmission) and the relay node can be in the same or different RRC states, including RRC connected state and RRC inactive state. If the relay node is in RRC inactive state, after receiving small data from the source node, it needs to enter the RRC connected state before forwarding, causing excessive signaling overhead for the relay node. How to effectively support small data transmission in relay transmission needs to be studied.

[0006] To address the aforementioned issues, this application discloses a solution for determining the small data transmission mode of a source node within a relay transmission network architecture. Based on the received relay node information, the source node can determine whether to directly transmit small data via the Uu air interface or to utilize the relay node to forward small data via the PC5 air interface. This solution improves the signaling overhead of relay nodes forwarding small data while reducing the power consumption of the relay nodes.

[0007] The inventors discovered through research that in both Layer 2 (L2) UE-to-Network and Layer 3 (L3) UE-to-Network relay communication modes, the source node (for uplink transmission) and / or the remote node (for downlink transmission) and the relay node can be in the same or different RRC states, including RRC connected state and RRC inactive state. Data at the relay node can be forwarded either in the RRC inactive state or after entering the RRC connected state. How to effectively support data transmission, especially small data transmission, in relay transmission requires further research. To address the above issues, this application discloses a solution for determining the RRC state and relay mode in relay node data transmission. In the relay node, the information received from the source node determines whether to perform L2 or L3 relay transmission in the RRC inactive state or the RRC connected state. This can improve the signaling overhead of data transmission between the relay node and the source node while reducing the power consumption of both the relay node and the source node.

[0008] Where there is no conflict, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other. Furthermore, although this application is initially intended for relay and terminal scenarios, it is also applicable to relay and base stations, achieving similar technical effects in relay and terminal scenarios. In addition, adopting a unified solution for different scenarios (including but not limited to V2X scenarios and terminal-base station communication scenarios) helps reduce hardware complexity and cost. Specifically, the interpretation of terms, nouns, functions, and variables in this application (unless otherwise specified) can be found in the definitions in the 3GPP specification protocols TS36, TS38, and TS37 series.

[0009] This application discloses a method used in a first node of wireless communication, characterized by comprising:

[0010] Receive first information via a secondary link; determine a first transmission mode based on at least the first information;

[0011] The first bit group is transmitted using the first transmission mode, and the first bit group includes at least one bit.

[0012] Wherein, the first transmission mode is one of the candidate transmission mode set, the candidate transmission mode set includes transmission via cellular link and transmission via secondary link; the first information is used to indicate a first condition set, the first condition set includes at least one condition; when all conditions in the first condition set are met, the candidate transmission mode set includes the candidate transmission mode of transmission via secondary link.

[0013] As an example, this application applies to UE-to-Network relay transmission.

[0014] As an example, this application applies to L2 relays.

[0015] As an example, the problem this application aims to solve is: how to effectively support small data transmission of the source node in a relay transmission network architecture, avoiding excessive signaling overhead and reducing the efficiency of the wireless communication system.

[0016] As an example, the solution of this application includes: the source node determines the small data transmission mode in the RRC inactive state by receiving information sent by the relay node; the small data transmission mode includes either sending directly to the network device via a cellular link or forwarding via a relay node through a secondary link.

[0017] As an example, the beneficial effects of this application include: the source node can flexibly determine the small data transmission mode by receiving relay node information, which can effectively reduce the signaling overhead of the relay node supporting the small data transmission of the source node, and at the same time reduce the power consumption of the relay node.

[0018] According to one aspect of this application, it includes:

[0019] The first set of conditions includes the first information, which includes the RRC connection status.

[0020] According to one aspect of this application, it includes:

[0021] The first information includes a first threshold; the first condition set includes a first bit set whose data volume is not less than the first threshold, and the first bit set includes the first bit group.

[0022] According to one aspect of this application, it includes:

[0023] When the first transmission mode is transmission via secondary link, the first bit group is transmitted via first RLC; when the first transmission mode is transmission via cellular link, the first bit group is transmitted via third RLC.

[0024] The first RLC bearer and the third RLC bearer correspond to the target bearer, respectively; the first bit group belongs to the target bearer.

[0025] According to one aspect of this application, it includes:

[0026] The second bit group is sent via the secondary link before the first information is received;

[0027] Receive the second information before sending the second bit group; receive the third information via the secondary link before receiving the first information and after sending the second bit group;

[0028] Wherein, the second information is used to configure the first RLC bearer; the third information is used to configure the third RLC bearer; and the third information is used to indicate that the first node enters an RRC inactive state.

[0029] According to one aspect of this application, it includes:

[0030] The third message is sent before the fourth message; the fourth message is used to indicate that the first RLC bearer is suspended.

[0031] According to one aspect of this application, it includes:

[0032] The fourth piece of information is used to indicate that the second RLC bearer is suspended;

[0033] Specifically, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

[0034] This application discloses a first node used for wireless communication, characterized in that it comprises:

[0035] A first receiver receives first information via a secondary link; and determines a first transmission mode based on at least the first information.

[0036] A first transmitter transmits a first bit group using the first transmission mode, the first bit group including at least one bit;

[0037] Wherein, the first transmission mode is one of the candidate transmission mode set, the candidate transmission mode set includes transmission via cellular link and transmission via secondary link; the first information is used to indicate a first condition set, the first condition set includes at least one condition; when all conditions in the first condition set are met, the candidate transmission mode set includes the candidate transmission mode of transmission via secondary link.

[0038] This application discloses a method used in a second node for wireless communication, characterized by comprising:

[0039] The first information is sent via the secondary link; the third bit group is sent via the cellular link.

[0040] The first bit group is received via the secondary link, and the first bit group includes at least one bit.

[0041] Wherein, at least the first information is used to determine a first transmission mode; the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via cellular link and transmission via secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; when all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode of transmission via secondary link; the third bit group includes the first bit group.

[0042] According to one aspect of this application, it includes:

[0043] The first set of conditions includes the first information, which includes the RRC connection status.

[0044] According to one aspect of this application, it includes:

[0045] The first information includes a first threshold; the first condition set includes a first bit set whose data volume is not less than the first threshold, and the first bit set includes the first bit group.

[0046] According to one aspect of this application, it includes:

[0047] The first bit group is received via a first RLC bearer; wherein the first RLC bearer corresponds to the target bearer; and the first bit group belongs to the target bearer.

[0048] According to one aspect of this application, it includes:

[0049] Before sending the first information, the second bit group is received via a secondary link; the fifth and sixth information are received via a cellular link.

[0050] Send a second message before receiving the second bit group; send a third message via a secondary link before sending the first message and after receiving the second bit group; send a fourth bit group via a cellular link after receiving the fifth message and before receiving the sixth message;

[0051] The fifth information is used to generate the second information; the fifth information is used to configure the first RLC bearer and the second RLC bearer; the sixth information is used to generate the third information; the third information is used to configure the third RLC bearer; the third information is used to instruct the receiver of the first information to enter an RRC inactive state; the fourth bit group includes the second bit group.

[0052] According to one aspect of this application, it includes:

[0053] Receive the fourth information via cellular link;

[0054] The sixth information is received before the fourth information; the fourth information is used to indicate that the first RLC bearer is suspended.

[0055] According to one aspect of this application, it includes:

[0056] The fourth piece of information is used to indicate that the second RLC bearer is suspended;

[0057] Specifically, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

[0058] This application discloses a second node used for wireless communication, characterized in that it comprises:

[0059] The second transmitter sends the first information via the secondary link and the third bit group via the cellular link.

[0060] The second receiver receives the first bit group via a secondary link, the first bit group including at least one bit;

[0061] Wherein, at least the first information is used to determine a first transmission mode; the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via cellular link and transmission via secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; when all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode of transmission via secondary link; the third bit group includes the first bit group.

[0062] This application discloses a method used in a third node for wireless communication, characterized by comprising:

[0063] The sixth message is sent via cellular link;

[0064] A first bit group is received via a cellular link, the first bit group comprising at least one bit;

[0065] The sixth information is used to generate the third information; the third information is used to configure the third RLC bearer; the third information is used to indicate entering the RRC inactive state; the first bit group is received through the third RLC bearer; the third RLC bearer corresponds to the target bearer; the first bit group belongs to the target bearer.

[0066] According to one aspect of this application, it includes:

[0067] Send the fourth message via cellular link;

[0068] The sixth information is sent before the fourth information; the fourth information is used to indicate that the first RLC bearer is suspended; the first RLC bearer corresponds to the target bearer.

[0069] According to one aspect of this application, it includes:

[0070] The fourth information is used to indicate that the second RLC bearer is suspended; wherein, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

[0071] According to one aspect of this application, it includes:

[0072] The fifth information is sent via the cellular link before the sixth information is sent.

[0073] The fourth bit group is received after the fifth message and before the sixth message is sent;

[0074] The fifth piece of information is used to configure the first RLC bearer and the second RLC bearer.

[0075] This application discloses a third node used for wireless communication, characterized in that it comprises:

[0076] The third transmitter sends the sixth message via a cellular link;

[0077] A third receiver receives a first bit group via a cellular link, the first bit group including at least one bit;

[0078] The sixth information is used to generate the third information; the third information is used to configure the third RLC bearer; the third information is used to indicate entering the RRC inactive state; the first bit group is received through the third RLC bearer; the third RLC bearer corresponds to the target bearer; the first bit group belongs to the target bearer.

[0079] This application discloses a method used in a first node of wireless communication, characterized by comprising:

[0080] Receive first information via secondary link, determine first target RRC status based on at least the first information; receive first bit set via secondary link;

[0081] Send the second information; generate a second bit set, and send the second bit set via a cellular link, wherein the second bit set includes the first bit set;

[0082] The first target RRC state is either an inactive RRC state or an connected RRC state; the second information is used to indicate the first target RRC state.

[0083] As an example, this application is applicable to wireless communication employing a relay mode; the relay mode includes at least one of L2 (Layer 2) relay or L3 (Layer 3) relay.

[0084] As an example, this application applies to UE-to-Network relay transmission.

[0085] As an example, the problem this application aims to solve is: how to effectively transmit data when the source node and relay node are in different RRC states, so as to avoid excessive signaling overhead and reduce the efficiency of the wireless communication system.

[0086] As an example, the solution of this application includes: the relay node determines whether to perform L2 or L3 relay transmission in an RRC inactive state or an RRC connected state by receiving information sent by the source node.

[0087] As an example, the beneficial effects of this application include: the relay node can flexibly determine the RRC status and select the relay mode by receiving the source node information, which can effectively improve the signaling overhead of data transmission between the relay node and the source node, while reducing the power consumption of the relay node and the source node.

[0088] According to one aspect of this application, it includes:

[0089] For the RRC inactive state and the RRC connected state, the action of generating the second bit set includes generating at least one PDCP PDU header only when the first target RRC state is the RRC inactive state. The second bit set includes the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[0090] According to one aspect of this application, it includes:

[0091] The third message is sent via a secondary link;

[0092] The second information is transmitted via a cellular link, and the third information is used to instruct the sender of the first information to enter or maintain the first target RRC state.

[0093] According to one aspect of this application, it includes:

[0094] Send the fourth message via cellular link;

[0095] The second information is sent via a secondary link, and the fourth information is used to instruct the first node to enter or maintain the first target RRC state.

[0096] According to one aspect of this application, it includes:

[0097] The third bit set is received via a secondary link before the first information is received, and the fifth information is received via a cellular link before the first information is received and after the fourth bit set is sent.

[0098] The fourth bit set, which includes the third bit set, is generated and transmitted via a cellular link before receiving the first information.

[0099] The fifth information is used to instruct the first node to enter the second target RRC state. The first node is in the second target RRC state when it receives the first information. The second target RRC state is one of the RRC inactive state and the RRC connected state, and the second target RRC state is different from the first target RRC state. The action of generating the second bit set and the action of generating the fourth bit set, whichever is in the RRC inactive state, includes generating at least one PDCP PDU header. The corresponding bit set includes the at least one PDCP PDU header. Any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number. The fourth bit set and the second bit set are transmitted through the same RLC bearer.

[0100] According to one aspect of this application, it includes:

[0101] The sixth message is received via a cellular link;

[0102] The sixth piece of information and the first piece of information are used to determine the first target RRC status.

[0103] According to one aspect of this application, it includes:

[0104] The seventh message is sent via the secondary link;

[0105] The seventh piece of information is used to generate the first piece of information.

[0106] This application discloses a first node used for wireless communication, characterized in that it comprises:

[0107] A first receiver receives first information via a secondary link and determines the first target RRC state based on at least the first information; it also receives a first set of bits via the secondary link.

[0108] A first transmitter sends second information; generates a second bit set, and sends the second bit set via a cellular link, the second bit set including the first bit set;

[0109] The first target RRC state is either an inactive RRC state or an connected RRC state; the second information is used to indicate the first target RRC state.

[0110] This application discloses a method used in a second node for wireless communication, characterized by comprising:

[0111] The first information is transmitted via the secondary link, and at least the first information is used to determine the first target RRC status; the first set of bits is transmitted via the secondary link.

[0112] Specifically, a second set of information is sent; a second set of bits is generated and sent via a cellular link, the second set of bits including the first set of bits; the first target RRC state is one of an RRC inactive state and an RRC connected state; the second information is used to indicate the first target RRC state.

[0113] According to one aspect of this application, it includes:

[0114] For the RRC inactive state and the RRC connected state, the second bit set is generated only when the first target RRC state is the RRC inactive state. This second bit set includes at least one PDCP PDU header being generated. The second bit set includes the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[0115] According to one aspect of this application, it includes:

[0116] Receive third information via a secondary link;

[0117] The second information is transmitted via a cellular link, and the third information is used to instruct the second node to enter or maintain the first target RRC state.

[0118] According to one aspect of this application, it includes:

[0119] The second information is received via a secondary link;

[0120] The fourth information is transmitted via a cellular link; the fourth information is used to instruct the recipient of the first information to enter or maintain the first target RRC state.

[0121] According to one aspect of this application, it includes:

[0122] The third set of bits is sent via a secondary link before the first information is sent, and the fifth information is received via a cellular link before the first information is sent and after the fourth set of bits is sent.

[0123] Specifically, a fourth bit set is generated and transmitted via a cellular link before sending the first information, and the fourth bit set includes the third bit set; the fifth information is used to indicate that the receiver of the first information enters a second target RRC state, and the receiver of the first information is in the second target RRC state when receiving the first information. The second target RRC state is one of the RRC inactive state and the RRC connected state, and the second target RRC state is different from the first target RRC state; the generation of the second bit set and the generation of the fourth bit set, which are both in the RRC inactive state, includes the generation of at least one PDCP PDU header, and the corresponding bit set includes the at least one PDCP PDU header. Any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number; the fourth bit set and the second bit set are transmitted through the same RLC bearer.

[0124] According to one aspect of this application, it includes:

[0125] The sixth message is received via the cellular link;

[0126] The sixth piece of information and the first piece of information are used to determine the first target RRC status.

[0127] According to one aspect of this application, it includes:

[0128] The seventh message is received via the secondary link;

[0129] The seventh piece of information is used to generate the first piece of information.

[0130] This application discloses a second node used for wireless communication, characterized in that it comprises:

[0131] The second transmitter transmits first information via a secondary link, at least the first information being used to determine the RRC status of the first target; and transmits a first set of bits via the secondary link.

[0132] Specifically, a second set of information is sent; a second set of bits is generated and sent via a cellular link, the second set of bits including the first set of bits; the first target RRC state is one of an RRC inactive state and an RRC connected state; the second information is used to indicate the first target RRC state.

[0133] This application discloses a method used in a first node of wireless communication, characterized by comprising:

[0134] Receive the first information via the secondary link; receive the sixth information via the cellular link; receive the first bit set via the secondary link;

[0135] The seventh information is sent via the secondary link; the second information is sent; a second bit set is generated and sent via the cellular link, wherein the second bit set includes the first bit set;

[0136] The sixth information is used to generate the seventh information; the seventh information is used to generate the first information; the second information is used to indicate the first target RRC state, which is either an RRC inactive state or an RRC connected state.

[0137] According to one aspect of this application, it includes:

[0138] The action of generating the second bit set includes generating at least one PDCP PDU header, wherein the second bit set includes the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[0139] According to one aspect of this application, it includes:

[0140] The third message is sent via a secondary link;

[0141] The second message is sent via a cellular link, and the third information is used to instruct the sender of the first message to enter or maintain the first target RRC state.

[0142] According to one aspect of this application, it includes:

[0143] Send the fourth message via cellular link;

[0144] The second message is sent via a secondary link, and the fourth message is used to instruct the first node to enter or maintain the first target RRC state.

[0145] According to one aspect of this application, it includes:

[0146] The third bit set is received via a secondary link before the first information is received, and the fifth information is received via a cellular link before the first information is received and after the fourth bit set is sent.

[0147] The fourth bit set, which includes the third bit set, is generated and transmitted via a cellular link before receiving the first information.

[0148] The fifth information is used to instruct the first node to enter the second target RRC state. The first node is in the second target RRC state when it receives the first information. The second target RRC state is one of the RRC inactive state and the RRC connected state, and the second target RRC state is different from the first target RRC state. The action of generating the second bit set and the action of generating the fourth bit set, whichever is in the RRC inactive state, includes generating at least one PDCP PDU header. The corresponding bit set includes the at least one PDCP PDU header. Any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number. The fourth bit set and the second bit set are transmitted through the same RLC bearer.

[0149] According to one aspect of this application, it includes:

[0150] The sixth piece of information and the first piece of information are used to determine the first target RRC status.

[0151] According to one aspect of this application, it includes:

[0152] The sixth information indicates the available relay modes; the seventh information indicates the supported relay modes;

[0153] The available relay modes indicated by the sixth information include the supported relay modes indicated by the seventh information.

[0154] This application discloses a first node used for wireless communication, characterized in that it comprises:

[0155] The first receiver receives the first information via a secondary link; receives the sixth information via a cellular link; and receives the first set of bits via a secondary link.

[0156] The first transmitter sends the seventh information via a secondary link; sends the second information; generates a second bit set and sends the second bit set via a cellular link, the second bit set including the first bit set;

[0157] The sixth information is used to generate the seventh information; the seventh information is used to generate the first information; the second information is used to indicate the first target RRC state, which is either an RRC inactive state or an RRC connected state.

[0158] This application discloses a method used in a second node for wireless communication, characterized by comprising:

[0159] The first information is sent via the secondary link; the first set of bits is sent via the secondary link.

[0160] The seventh message is received via the secondary link;

[0161] The sixth information is received via a cellular link; the sixth information is used to generate the seventh information; the seventh information is used to generate the first information; the second information is sent; a second bit set is generated and sent via a cellular link, the second bit set including the first bit set; the second information is used to indicate a first target RRC state, the first target RRC state being one of an RRC inactive state and an RRC connected state.

[0162] According to one aspect of this application, it includes:

[0163] For the RRC inactive state and the RRC connected state, the second bit set is generated only when the first target RRC state is the RRC inactive state. This second bit set includes at least one PDCP PDU header being generated. The second bit set includes the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[0164] According to one aspect of this application, it includes:

[0165] Receive third information via a secondary link;

[0166] The second information is transmitted via a cellular link, and the third information is used to instruct the second node to enter or maintain the first target RRC state.

[0167] According to one aspect of this application, it includes:

[0168] The second information is received via a secondary link;

[0169] The fourth information is transmitted via a cellular link; the fourth information is used to instruct the recipient of the first information to enter or maintain the first target RRC state.

[0170] According to one aspect of this application, it includes:

[0171] The third set of bits is sent via a secondary link before the first information is sent, and the fifth information is received via a cellular link before the first information is sent and after the fourth set of bits is sent.

[0172] Specifically, a fourth bit set is generated and transmitted via a cellular link before sending the first information, and the fourth bit set includes the third bit set; the fifth information is used to indicate that the receiver of the first information enters a second target RRC state, and the receiver of the first information is in the second target RRC state when receiving the first information. The second target RRC state is one of the RRC inactive state and the RRC connected state, and the second target RRC state is different from the first target RRC state; the generation of the second bit set and the generation of the fourth bit set, which are both in the RRC inactive state, includes the generation of at least one PDCP PDU header, and the corresponding bit set includes the at least one PDCP PDU header. Any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number; the fourth bit set and the second bit set are transmitted through the same RLC bearer.

[0173] According to one aspect of this application, it includes:

[0174] The sixth piece of information and the first piece of information are used to determine the first target RRC status.

[0175] According to one aspect of this application, it includes:

[0176] The sixth information indicates the available relay modes; the seventh information indicates the supported relay modes;

[0177] The available relay modes indicated by the sixth information include the supported relay modes indicated by the seventh information.

[0178] This application discloses a second node used for wireless communication, characterized in that it comprises:

[0179] The second transmitter sends the first information via the secondary link; it also sends the first set of bits via the secondary link.

[0180] The second receiver receives the seventh information via the secondary link;

[0181] The sixth information is received via a cellular link; the sixth information is used to generate the seventh information; the seventh information is used to generate the first information; the second information is sent; a second bit set is generated and sent via a cellular link, the second bit set including the first bit set; the second information is used to indicate a first target RRC state, the first target RRC state being one of an RRC inactive state and an RRC connected state. Attached Figure Description

[0182] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0183] Figure 1A A transmission flowchart of a first node according to an embodiment of this application is illustrated;

[0184] Figure 1B A transmission flowchart of a first node according to an embodiment of this application is illustrated;

[0185] Figure 2 A schematic diagram illustrating a network architecture according to an embodiment of this application is provided;

[0186] Figure 3 A schematic diagram illustrating a wireless protocol architecture for the user plane and control plane according to an embodiment of this application is provided.

[0187] Figure 4 A schematic diagram of the hardware module of a communication device according to an embodiment of this application is illustrated;

[0188] Figure 5A A flowchart illustrating a wireless signal transmission process according to one embodiment of this application is provided.

[0189] Figure 5B A flowchart illustrating a wireless signal transmission process according to one embodiment of this application is provided.

[0190] Figure 6A Another wireless signal transmission flowchart according to one embodiment of this application is illustrated;

[0191] Figure 6B A second wireless signal transmission flowchart according to an embodiment of this application is illustrated;

[0192] Figure 7A A schematic diagram illustrating a wireless protocol architecture for relay transmission according to an embodiment of this application is provided.

[0193] Figure 7B A third wireless signal transmission flowchart according to an embodiment of this application is illustrated;

[0194] Figure 8A A structural block diagram of a processing apparatus in a first node according to an embodiment of this application is illustrated;

[0195] Figure 8B A fourth wireless signal transmission flowchart according to an embodiment of this application is illustrated;

[0196] Figure 9A A structural block diagram of a processing apparatus in a second node according to an embodiment of this application is illustrated;

[0197] Figure 9B Another transmission flowchart of a first node according to an embodiment of this application is illustrated;

[0198] Figure 10A A structural block diagram of a processing apparatus in a third node according to an embodiment of this application is illustrated;

[0199] Figure 10B A schematic diagram illustrating a wireless protocol architecture for relay transmission according to an embodiment of this application is provided.

[0200] Figure 11 A structural block diagram of a processing apparatus in a first node according to an embodiment of this application is illustrated;

[0201] Figure 12 A structural block diagram of a processing apparatus in a second node according to an embodiment of this application is illustrated. Detailed Implementation

[0202] The technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0203] Example 1A

[0204] Example 1A illustrates a transmission flowchart of a first node according to an embodiment of this application, as shown in the attached diagram. Figure 1A As shown.

[0205] In Example 1A, the first node 100A receives first information via a secondary link in step 101A; determines a first transmission mode based on at least the first information; and transmits a first bit group using the first transmission mode in step 102A, the first bit group including at least one bit. The first transmission mode is one of a set of candidate transmission modes, which includes transmission via a cellular link and transmission via a secondary link. The first information is used to indicate a first set of conditions, which includes at least one condition. When all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode transmitted via the secondary link.

[0206] As an example, the first node is in the RRC inactive state when it receives the first information.

[0207] As an example, after receiving the first information and before sending the first bit group, the first node does not receive information indicating the RRC status of the sender of the first information via the secondary link.

[0208] As an example, the first information indicates the RRC status of the sender of the first information that is closest to the one that sent the first bit group.

[0209] As an example, the secondary link belongs to the PC5 air interface.

[0210] As an example, the first information is received in the PC5-RRC sublayer.

[0211] As an example, the first information is a PC5-RRC message.

[0212] As one embodiment, the first information includes all or part of the IE (Information Element) in a PC5-RRC message.

[0213] As one example, the first information includes all or part of the fields in an IE of a PC5-RRC message.

[0214] As an example, the name of the first information includes relay.

[0215] As one example, the first information includes RRCReconfigurationRelay (relay RRC reconfiguration).

[0216] As one example, the first information includes RRCReconfigurationSidelink (RRC reconfiguration of the secondary link).

[0217] As one example, the first information includes RelayAssistantInformation.

[0218] As an example, the first information is used to indicate a first set of conditions, which includes at least one condition.

[0219] As one embodiment, the first set of conditions includes the first information indicating the candidate transmission mode transmitted via the secondary link.

[0220] As one embodiment, the phrase "the first condition set includes the first information indicating the candidate transmission mode transmitted via the secondary link" includes: the first condition set includes the first information including the candidate transmission mode transmitted via the secondary link.

[0221] As an example, the phrase, the first condition set, includes the first information indicating that the candidate transmission mode for transmission via the secondary link includes: the first condition set includes the first information including that allowing transmission via the secondary link is set to Yes.

[0222] As an example, the phrase, the first condition set, includes the first information indicating that the candidate transmission mode for transmission via the secondary link includes: the first condition set includes the first information indicating that transmission via the secondary link is set to allowed.

[0223] As an example, when all conditions in the first set of conditions are met, the candidate transmission mode set includes the candidate transmission modes transmitted via the secondary link.

[0224] As an example, when any condition in the first set of conditions is not met, the candidate transmission mode set does not include the candidate transmission mode transmitted via the secondary link.

[0225] As an example, the first transmission mode is determined based on at least the first information.

[0226] As an example, the first transmission mode is determined by at least one of the following three factors: the data volume of the first bit set or the channel state, based on the first information; the channel state includes at least one of the cellular link channel state or the secondary link channel state.

[0227] As an example, the data volume of the first bit set is the total number of bits included in the first bit set.

[0228] As an example, the amount of data in the first bit set is represented in bits.

[0229] As an example, the amount of data in the first set of bits is represented in bytes.

[0230] As an example, the channel state includes RSRP (Reference Signal Received Power).

[0231] As an example, the channel state includes RSRQ (Reference Signal Received Quality).

[0232] As an example, the channel state includes RSSI (Received Signal Strength Indicator).

[0233] As an example, the channel state includes path loss (PL).

[0234] As an example, the cellular link channel state is the channel state between the first node and the serving base station of the first node.

[0235] As an example, the secondary link channel state is the channel state between the first node and the sender of the first information.

[0236] As an example, the first node obtains the channel state by measurement.

[0237] As an example, the first node receives the channel status sent by the serving base station of the first node.

[0238] As an example, the first node receives the channel state sent by the sender of the first information.

[0239] As an example, the first bit group is transmitted using the first transmission mode.

[0240] As an example, the first transmission mode is one of a set of candidate transmission modes, which includes transmission via a cellular link and transmission via a secondary link.

[0241] As an example, the cellular link is an uplink.

[0242] As an example, the cellular link is a downlink.

[0243] As an example, the cellular link belongs to the Uu air interface.

[0244] As one embodiment, the transmission via cellular link includes the first node transmitting to its serving base station via the cellular link.

[0245] As one embodiment, the transmission via the secondary link includes the first node transmitting the first information to the sender of the first information via the secondary link.

[0246] As an example, the first bit group includes at least one bit.

[0247] As an example, the first bit group includes at least one byte.

[0248] As one example, the first bit group comprises a positive integer number of bits.

[0249] As one embodiment, the first bit group includes at least one RLC (Radio Link Control) SDU (Service Data Unit).

[0250] As an example, the first bit group includes at least one PDCP (Packet Data Convergence Protocol) SDU.

[0251] As an example, the first bit group includes at least one MAC (Medium Access Control) SDU.

[0252] As an example, the first bit group includes at least one MAC PDU (Protocol Data Unit).

[0253] As an example, the amount of data in the first bit group does not exceed the second threshold.

[0254] As one example, the second threshold is configured by the network.

[0255] As one example, the second threshold is pre-configured.

[0256] As an example, the second threshold is a fixed value.

[0257] As an example, the second threshold is specified.

[0258] As one example, the second threshold is represented in bytes.

[0259] Example 1B

[0260] Example 1B illustrates a transmission flowchart of a first node according to an embodiment of this application, as shown in the attached diagram. Figure 1B As shown.

[0261] In Example 1B, in step 101B, the first node 100B receives first information via a secondary link and determines a first target RRC state based on at least the first information; receives a first bit set via the secondary link; sends second information in step 102B; generates a second bit set and sends the second bit set via a cellular link, the second bit set including the first bit set; wherein, the first target RRC state is one of an RRC inactive state and an RRC connected state; the second information is used to indicate the first target RRC state.

[0262] As an example, the first node is in the RRC inactive state when it receives the first information.

[0263] As an example, the secondary link belongs to the PC5 air interface.

[0264] As an example, the first information is generated in the PC5-RRC sub-layer.

[0265] As an example, the first information includes PC5-RRC information.

[0266] As one embodiment, the first information includes all or part of the IE (Information Element) in a PC5-RRC message.

[0267] As one example, the first information includes all or part of the fields in an IE of a PC5-RRC message.

[0268] As an example, the first information display indicates relay mode.

[0269] As an example, the first information implicitly indicates the relay mode.

[0270] As an example, the first information carries a relay mode.

[0271] As one embodiment, the relay mode includes at least one of L2 relay or L3 relay.

[0272] As one embodiment, the first information carries at least one bearer identifier; at least one bearer identified by the at least one bearer identifier is configured in the relay mode; any one of the at least one bearer is either a signaling radio bearer or a data radio bearer.

[0273] As one embodiment, the first information carries at least one bearer identifier; at least one bearer identified by the at least one bearer identifier is configured for Small Data Transmission (SDT); any one of the at least one bearers is a data radio bearer.

[0274] As one embodiment, the bearer is a radio bearer (RB).

[0275] As an example, the bearer is an EPS (Evolved Packet Switched System) bearer.

[0276] As an example, the bearer is an E-RAB (E-UTRAN radio access bearer, evolved UMTS (Universal Mobile Telecommunication System) terrestrial radio access network radio access bearer).

[0277] As one example, the bearer is indicated by a Logical Channel Identity (LCID).

[0278] As an example, the first information carries at least one QoS (Quality of Service) parameter set; the at least one QoS parameter set is applied to the transmission in the relay mode.

[0279] As an example, the first information carries at least one set of QoS parameters; the at least one set of QoS parameters is applied to SDT transmission.

[0280] As an example, the first information belongs to PC5 signaling.

[0281] As an example, the PC5 signaling includes PC5-S signaling.

[0282] As one example, the PC5 signaling includes PC5-RRC signaling.

[0283] As an example, the PC5 signaling includes Discovery signaling.

[0284] As an example, the first information belongs to Uu signaling.

[0285] As one example, the Uu signaling includes RRC signaling.

[0286] As one example, the first information includes RRRCResumeRequest (Radio Resource Control Continue Request).

[0287] As one example, the first information includes RRRCResumeRequest1 (Radio Resource Control Continue Request 1).

[0288] As one example, the first information includes RRRCResumeRequest_Relay (Relay Radio Resource Control Continue Request).

[0289] As an example, the first information includes RRRCResumeRequest1_Relay (Relay Radio Resource Control Continue Request 1).

[0290] As one example, the first information includes RRCSetupRequest (Radio Resource Control Establishment Request).

[0291] As an example, the first information includes RRCSetupRequest_Relay (Relay Radio Resource Control Establishment Request).

[0292] As one example, the first information includes a Discovery message.

[0293] As an example, the name of the first information includes relay.

[0294] As an example, the first information indicates the relay mode.

[0295] As an example, the first information belongs to the Signaling Radio Bearer.

[0296] As an example, the signaling radio bearer is a sidelink-signaling radio bearer.

[0297] As an example, the signaling radio bearer is a Uu signaling radio bearer.

[0298] As one embodiment, the signaling radio bearer is used to send PC5-S (PC5-Signaling) messages.

[0299] As one embodiment, the signaling radio bearer is used to send PC5-RRC (PC5-Radio Resource Control) messages.

[0300] As one embodiment, the signaling radio bearer is used to send RRC messages.

[0301] As one example, the signaling radio bearer is used to send Discovery messages.

[0302] As one embodiment, the signaling radio bearer includes SL-SRB0.

[0303] As one embodiment, the signaling radio bearer includes SL-SRB1.

[0304] As one embodiment, the signaling radio bearer includes SL-SRB2.

[0305] As one embodiment, the signaling radio bearer includes SL-SRB3.

[0306] As one embodiment, the signaling radio bearer includes SL-SRB4.

[0307] As one embodiment, the signaling radio bearer includes SRB0 (signaling radio bearer 0).

[0308] As an example, the first information is sent via the default L2 (Layer 2) configuration (defaultRLC (Radio Link Control) configuration).

[0309] As an example, the first information is sent through a pre-configured L2 configuration.

[0310] As an example, the first information is sent via a specified L2 configuration.

[0311] As an example, the first set of bits belongs to the Data Radio Bearer (DRB).

[0312] As an example, the first node determines the first target RRC status based on the first information.

[0313] As an example, the first target RRC state is one of the RRC inactive state and the RRC connected state.

[0314] As an example, the first node determines the first target RRC status based on the relay mode indicated by the first information.

[0315] As an example, when the relay mode indicated by the first information is at least the former of the L2 relay or the L3 relay, the first target RRC state is determined to be the RRC connection state.

[0316] As an example, when the relay mode indicated by the first information is the L3 relay, the first target RRC state is determined to be the RRC connection state.

[0317] As an example, when the relay mode indicated by the first information is the L3 relay, the first target RRC state is determined to be the RRC inactive state.

[0318] As an example, the first node determines the first target RRC status based on the signaling type included in the first information; the signaling type includes either the PC5 signaling or the Uu signaling.

[0319] As an example, when the first information is PC5 signaling, the first target RRC state is determined to be the RRC connection state.

[0320] As an example, when the first information is PC5 signaling, the first target RRC status is determined to be the RRC inactive state.

[0321] As an example, when the first information is Uu signaling, the first target RRC state is determined to be the RRC connection state.

[0322] As an example, when the first information is Uu signaling, the first target RRC state is determined to be the RRC inactive state.

[0323] As an example, when the first information is either RRCResumeRequest or RRCResumeRequest1, the first target RRC state is determined to be the RRC connection state.

[0324] As an example, when the first information is either RRCResumeRequest or RRCResumeRequest1, the first target RRC status is determined to be the RRC inactive state.

[0325] As an example, when the first information is RRCSetupRequest, the first target RRC state is determined to be the RRC connection state.

[0326] As an example, when the first information is unicast transmission, the first target RRC state is determined to be the RRC connection state; the first information includes Destination Layer-2 ID; the Destination Layer-2 ID is the ProSe UE ID (Proximity-Service UserEquipment Identity) of the first node.

[0327] As an example, when the first information is a multicast transmission, the first target RRC state is determined to be the RRC connection state.

[0328] As an example, when the first information is a multicast transmission, the first target RRC state is determined to be the RRC inactive state.

[0329] As an example, when the first information is broadcast transmission, the first target RRC state is determined to be the RRC connection state.

[0330] As an example, when the first information is broadcast, the first target RRC state is determined to be the RRC inactive state.

[0331] As an example, when the first information is a multicast transmission, the first information includes ProSeLayer-2 Group ID (Proximity-Service Layer-2 Group Identity).

[0332] As an example, the first node determines the first target RRC state based on whether the first bit set is a unicast transmission.

[0333] As an example, when the first bit set is the unicast transmission, the first target RRC state is determined to be the RRC connection state.

[0334] As an example, when the first bit set is transmitted via either multicast or broadcast, the first target RRC state is determined to be the RRC inactive state.

[0335] As an example, the first node determines the first target RRC state based on its RRC state when receiving the first information and the first information.

[0336] As an example, the first node determines the first target RRC state based on its RRC state when receiving the first information and the relay mode indicated by the first information.

[0337] As an example, when the RRC state at the time of receiving the first information is the RRC connection state and the relay mode indicated by the first information is at least one of the L2 relay or the L3 relay, the first target RRC state is determined to be the RRC connection state.

[0338] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the relay mode indicated by the first information is at least the former of the L2 relay or the L3 relay, the first target RRC state is determined to be the RRC connected state.

[0339] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the relay mode indicated by the first information is the L3 relay, the first target RRC state is determined to be the RRC connected state.

[0340] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the relay mode indicated by the first information is the L3 relay, the first target RRC state is determined to be the RRC inactive state.

[0341] As an example, the first node determines the first target RRC state based on the RRC state it is in when receiving the first information and the signaling type included in the first information; the signaling type includes either the PC5 signaling or the Uu signaling.

[0342] As an example, when the RRC state at the time of receiving the first information is the RRC connection state and the signaling type included in the first information is either the PC5 signaling or the Uu signaling, the first target RRC state is determined to be the RRC connection state.

[0343] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the signaling type included in the first information is the PC5 signaling, the first target RRC state is determined to be the RRC connected state.

[0344] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the signaling type included in the first information is the PC5 signaling, the first target RRC state is determined to be the RRC inactive state.

[0345] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the signaling type included in the first information is the Uu signaling, the first target RRC state is determined to be the RRC connected state.

[0346] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the signaling type included in the first information is the Uu signaling, the first target RRC state is determined to be the RRC inactive state.

[0347] As an example, when the RRC state at the time of receiving the first information is the RRC connection state and the first information is an RRCSetupRequest, the first target RRC state is determined to be the RRC connection state.

[0348] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the first information is an RRCSetupRequest, the first target RRC state is determined to be the RRC connected state.

[0349] As an example, when the RRC state at the time of receiving the first information is the RRC connection state and the first information is either RRCResumeRequest or RRCResumeRequest1, the first target RRC state is determined to be the RRC connection state.

[0350] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the first information is either RRCResumeRequest or RRCResumeRequest1, the first target RRC state is determined to be the RRC connected state.

[0351] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state and the first information is either RRCResumeRequest or RRCResumeRequest1, the first target RRC state is determined to be the RRC inactive state.

[0352] As an example, the first node determines the first target RRC state based on its RRC state when receiving the first information, the first information, and the first bit set.

[0353] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state, and the first information is either RRCResumeRequest or RRCResumeRequest1, and the data volume included in the first bit set exceeds the first threshold, the first target RRC state is determined to be the RRC connected state.

[0354] As an example, when the RRC state at the time of receiving the first information is the RRC inactive state, and the first information is either RRCResumeRequest or RRCResumeRequest1, and the data volume included in the first bit set does not exceed the first threshold, the first target RRC state is determined to be the RRC inactive state.

[0355] As an example, when the RRC state at the time of receiving the first information is the RRC connection state, and the first information is either RRCResumeRequest or RRCResumeRequest1, and the data volume included in the first bit set exceeds the first threshold, the first target RRC state is determined to be the RRC connection state.

[0356] As an example, when the RRC state at the time of receiving the first information is the RRC connection state, and the first information is either RRCResumeRequest or RRCResumeRequest1, and the data volume included in the first bit set does not exceed a first threshold, the first target RRC state is determined to be the RRC connection state.

[0357] As one example, the first threshold is configured by the network.

[0358] As an example, the first threshold is pre-configured.

[0359] As an example, the first threshold is a fixed value.

[0360] As an example, the first threshold is specified.

[0361] As an example, the first node determines the first target RRC state based on the first information and the first bit set.

[0362] As an example, the first target RRC state is used to determine whether the behavior generates a second bit set including generating a PDCP (Packet Data Convergence Protocol) PDU (Protocol Data Unit) header.

[0363] As an example, when the first target RRC state is the RRC connection state, it is determined that the behavior of generating the second bit set does not include generating the PDCP PDU header.

[0364] As an example, when the first target RRC state is the RRC inactive state, determining the behavior to generate the second bit set includes generating the PDCP PDU header.

[0365] As an example, the first target RRC state is used to determine whether the behavior generates a second bit set including the generation of a PDCP PDU header.

[0366] As an example, the first node determines whether the behavior of generating the second bit set includes generating a PDCP PDU header based on the RRC state it is in when receiving the first information and the first target RRC state.

[0367] As an example, when the first information is received, the RRC state is the RRC connection state and the first target RRC state is the RRC connection state. Determining the behavior to generate the second bit set includes generating the PDCP PDU header.

[0368] As an example, when the first information is received, if the RRC state is the RRC connection state and the first target RRC state is the RRC connection state, it is determined that the behavior generates a second bit set, which does not include generating the PDCP PDU header.

[0369] As an example, when the first information is received, the RRC state is the RRC inactive state and the first target RRC state is the RRC connected state. Determining the behavior to generate the second bit set includes generating the PDCP PDU header.

[0370] As an example, if the RRC state when the first information is received is the RRC inactive state and the first target RRC state is the RRC connected state, then the behavior of generating the second bit set does not include generating the PDCP PDU header.

[0371] As an example, when the first information is received, if the RRC state is in an inactive state and the first target RRC state is also inactive, determining the behavior to generate the second bit set includes generating the PDCP PDU header.

[0372] As one example, the second information is sent via a secondary link.

[0373] As a sub-example of the above embodiment, the second information is used to instruct the sender of the first information to enter the first target RRC state.

[0374] As one example, the second information is transmitted via a cellular link.

[0375] As a sub-implementation of the above embodiments, the second information is used to request the first node to enter the first target RRC state.

[0376] As a sub-implementation of the above embodiments, the second information is used to request the sender of the first information to enter the first target RRC state.

[0377] As a sub-implementation of the above embodiments, the second information is used to request the first node to enter the first target RRC state and to request the sender of the first information to enter the first target RRC state.

[0378] As one embodiment, the second information belongs to PC5 signaling; the PC5 signaling includes either PC5-S signaling or PC5-RRC signaling.

[0379] As one embodiment, the second information belongs to Uu signaling; the Uu signaling includes RRC signaling.

[0380] As one example, the second information is RRRCResumeRequest (Radio Resource Control Continue Request).

[0381] As one example, the second information is RRRCResumeRequest1 (Radio Resource Control Continue Request 1).

[0382] As one example, the second information includes RCResume_Relay (Relay Radio Resource Control Continues).

[0383] As an example, the second information is RRCSetupRequest (Radio Resource Control Establishment Request).

[0384] As one example, the second information includes RRCSetup_Relay (Relay Radio Resource Control Establishment).

[0385] As one embodiment, the second information belongs to the Signaling Radio Bearer.

[0386] As an example, the second information may be used to trigger the transmission of the first set of bits.

[0387] As one example, the second bit set is generated and transmitted via a cellular link.

[0388] As an example, the cellular link is an uplink.

[0389] As an example, the cellular link is a downlink.

[0390] As an example, the cellular link belongs to the Uu air interface.

[0391] As one embodiment, the second bit set includes the first bit set.

[0392] As an example, the second set of bits belongs to the data radio bearer.

[0393] As one embodiment, the second bit set includes at least one byte other than the first bit set.

[0394] As an example, the first bit set and the second bit set each include at least one byte.

[0395] As an example, the first bit set and the second bit set each include a positive integer number of bits.

[0396] As an example, the first bit set and the second bit set each include at least one RLCSDU (Service Data Unit).

[0397] As an example, the first bit set and the second bit set each include at least one PDCPSDU.

[0398] As an example, the RRC state of the first node when receiving the first information is related to the amount of data included in the first information and the second bit set.

[0399] As an example, when the first node is in the RRC inactive state when receiving the first information and when the relay mode indicated by the first information is the L2 relay, the amount of data included in the second bit set is greater than the amount of data included in the first bit set.

[0400] As an example, when the first node is in the RRC inactive state when receiving the first information and when the relay mode indicated by the first information is the L3 relay, the amount of data included in the second bit set is not less than the amount of data included in the first bit set.

[0401] As an example, the second information is used to explicitly indicate the first target RRC status.

[0402] As an example, the second information is used to implicitly indicate the first target RRC status.

[0403] As an example, when the second information is either RRCResumeRequest or RRCResumeRequest1, it indicates that the first target RRC status is an RRC connection status.

[0404] As an example, when the second information is either RRCResumeRequest or RRCResumeRequest1, it indicates that the first target RRC status is an inactive RRC status.

[0405] As an example, when the second information is RRCSetupRequest, it indicates that the first target RRC status is RRC connection status.

[0406] As an example, when the second information belongs to PC5 signaling, it indicates that the first target RRC status is RRC connection status.

[0407] As an example, when the second information belongs to PC5 signaling, it indicates that the first target RRC status is RRC inactive.

[0408] As an example, when the second information belongs to Uu signaling, it indicates that the first target RRC state is an RRC connection state.

[0409] As an example, when the second information belongs to Uu signaling, it indicates that the first target RRC status is RRC inactive.

[0410] As an example, when the second information belongs to RRCResume_Relay or RRCSetup_Relay, it indicates that the first target RRC state is an RRC connection state.

[0411] As an example, the action of generating the second bit set includes generating at least one ADAPT (adaptive) PDU header, the second bit set including the at least one ADAPT PDU header, any one of the at least one ADAPT PDU headers including a first identifier; the first identifier is used to indicate the bearer to which the first bit set belongs.

[0412] As one embodiment, the first identifier includes the bearer identifier to which the first bit set belongs.

[0413] As one embodiment, the first identifier includes the destination receiving node identifier of the first bit set.

[0414] As one embodiment, the first identifier includes the bearer identifier to which the first bit set belongs and the destination receiving node identifier of the first bit set.

[0415] Example 2

[0416] Example 2 illustrates a network architecture diagram according to an embodiment of this application, as shown in the attached diagram. Figure 2 As shown. Figure 2This diagram illustrates the network architecture 200 of NR 5G, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) systems. The NR 5G, LTE, or LTE-A network architecture 200 may be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable term. 5GS / EPS 200 may include one or more UE (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. 5GS / EPS can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown in the figure, 5GS / EPS provides packet switching services; however, those skilled in the art will readily understand 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 termination toward UE 201. gNB 203 can connect to other gNBs 204 via an Xn interface (e.g., a backhaul link). The XnAP protocol of the Xn interface is used to transmit control plane messages for the radio network, and the user plane protocol of the Xn interface is used to transmit user plane data. gNB 203 may also be referred to as a base station, base transceiver station, radio base station, radio transceiver, transceiver function, Basic Service Set (BSS), Extended Service Set (ESS), TRP (Transmission Reception Point), or some other suitable term. In NTN (Non-Terrestrial Network) networks, gNB 203 can be a satellite, an aircraft, or a ground base station relayed via satellite. gNB203 provides UE201 with an access point to 5GC / EPC210.Examples of UE201 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband IoT devices, machine-type communication devices, land vehicles, automobiles, in-vehicle equipment, in-vehicle communication units, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE201 as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or any other suitable term. gNB203 connects 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 / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF 213. MME / AMF / SMF 211 is the control node handling signaling between UE201 and 5GC / EPC210. ​​Generally, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through S-GW / UPF 212, which is itself connected to P-GW / UPF 213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF213 connects to Internet service 230. Internet service 230 includes carrier-compliant Internet protocol services, specifically including Internet, intranet, IMS (IP Multimedia Subsystem), and PS (Packet Switching) streaming services.

[0417] As an example, UE241 corresponds to the first node in this application.

[0418] As an example, UE201 corresponds to the second node in this application.

[0419] As an example, gNB203 corresponds to the third node in this application.

[0420] As an example, the gNB203 is a macrocell base station.

[0421] As an example, the gNB203 is a microcell base station.

[0422] As an example, the gNB203 is a pico cell base station.

[0423] As an example, the gNB203 is a femtocell.

[0424] As an example, the gNB203 is a base station device that supports large latency differences.

[0425] As one example, the gNB203 is a flight platform device.

[0426] As an example, the gNB203 is a satellite device.

[0427] As an example, the gNB203 is a base station device that supports large latency differences.

[0428] As one embodiment, the gNB203 is a test device (e.g., a transceiver device simulating part of the functions of a base station, a signaling tester).

[0429] As an example, the radio link from the UE201 to the gNB203 is an uplink, which is used to perform uplink transmissions.

[0430] As an example, the radio link from the gNB203 to the UE201 is a downlink, which is used to perform downlink transmissions.

[0431] As an example, the wireless link from the UE241 to the gNB203 is an uplink, which is used to perform uplink transmissions.

[0432] As an example, the radio link from the gNB203 to the UE241 is a downlink, which is used to perform downlink transmissions.

[0433] As an example, the wireless link between UE201 and UE241 is a secondary link, which is used to perform secondary link transmission.

[0434] As an example, the UE201 and the gNB203 are connected via the Uu air interface.

[0435] As an example, the UE241 and the gNB203 are connected via the Uu air interface.

[0436] As an example, UE201 and UE241 are connected via a PC5 air interface.

[0437] Example 3

[0438] Example 3 illustrates a schematic diagram of a wireless protocol architecture for the user plane and control plane according to an embodiment of this application, as shown in the attached diagram. Figure 3 As shown. Figure 3 This is a schematic diagram illustrating an embodiment of a wireless protocol architecture for the user plane 350 and the control plane 300. Figure 3The radio protocol architecture of the UE and gNB control plane 300 is illustrated using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical Layer) signal processing functions. L1 layer will be referred to as PHY301 in this document. Layer 2 (L2 layer) 305 sits above PHY301 and is responsible for the link between the UE and gNB through PHY301. L2 layer 305 includes the MAC (Medium Access Control) sublayer 302, the RLC (Radio Link Control) sublayer 303, and the PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the gNB on the network side. The PDCP sublayer 304 provides data encryption and integrity protection, and also provides cross-cell mobility support for the UE between gNBs. RLC sublayer 303 provides packet segmentation and reassembly, implements retransmission of lost packets through ARQ, and also provides duplicate packet detection and protocol error detection. MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell among UEs. MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3) of the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. Although not illustrated, the UE's control plane 300 may also have a V2X layer above the RRC sublayer 306. The V2X layer is responsible for generating PC5 QoS parameter sets and QoS rules based on the received service data or service requests. It generates a PC5 QoS flow corresponding to the PC5 QoS parameter set and sends the PC5 QoS flow identifier and the corresponding PC5 QoS parameter set to the AS (Access Stratum) layer for the AS layer to perform QoS processing on data packets belonging to the PC5 QoS flow identifier. The V2X layer also includes a PC5-S Signaling Protocol sublayer, which is responsible for indicating to the AS layer whether each transmission is a PC5-S transmission or a V2X service data transmission.The radio protocol architecture of user plane 350 includes Layer 1 (L1 layer) and Layer 2 (L2 layer). The radio protocol architecture in user plane 350 is largely the same as the corresponding layers and sublayers in control plane 300 for physical layer 351, PDCP sublayer 354 in L2 layer 355, RLC sublayer 353 in L2 layer 355, and MAC sublayer 352 in L2 layer 355. However, PDCP sublayer 354 also provides header compression for upper layer packets to reduce radio transmission overhead. L2 layer 355 in user plane 350 also includes SDAP (Service Data Adaptation Protocol) sublayer 356. SDAP sublayer 356 is responsible for mapping between QoS streams and data radio bearers (DRBs) to support service diversity. The UE's radio protocol architecture in the user plane 350 may include some or all of the protocol sublayers of SDAP sublayer 356, PDCP sublayer 354, RLC sublayer 353, and MAC sublayer 352 at the L2 layer. Although not illustrated, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) terminating at the P-GW on the network side and an application layer terminating at the other end of the connection (e.g., remote UE, server, etc.).

[0439] As an example, the RLC channel includes the SAP (Service Access Point) between the RLC303 and the PDCP304.

[0440] As an example, the RLC channel includes the SAP between the RLC353 and the PDCP354.

[0441] As an example, the logical channel includes the SAP between the RLC303 and the MAC302.

[0442] As an example, the logical channel includes the SAP between the RLC353 and the MAC352.

[0443] As one embodiment, the transport channel includes the SAP between the MAC302 and the PHY301.

[0444] As one embodiment, the transmission channel includes SAP between the MAC352 and the PHY351.

[0445] As an example, Appendix Figure 3The entities of multiple sub-layers in the control plane form an SRB (Signaling Radio Bearer) in the vertical direction.

[0446] As an example, Appendix Figure 3 The entities of multiple sub-layers in the user plane form a DRB (Data Radio Bearer) in the vertical direction.

[0447] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the first node in this application.

[0448] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the second node in this application.

[0449] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the third node in this application.

[0450] As an example, the first information in this application is generated in the RRC306.

[0451] As an example, the second information in this application is generated in the RRC306.

[0452] As an example, the third information in this application is generated in the RRC306.

[0453] As an example, the fourth information in this application is generated in the RRC306.

[0454] As an example, the fifth information in this application is generated in the RRC306.

[0455] As an example, the sixth information in this application is generated in the RRC306.

[0456] As an example, the seventh information in this application is generated in the RRC306.

[0457] As an example, the first bit group in this application is generated in the MAC302.

[0458] As an example, the first bit group in this application is generated in the MAC352.

[0459] As an example, the first bit group in this application is generated in the RLC303.

[0460] As an example, the first bit group in this application is generated in the RLC353.

[0461] As an example, the first bit group in this application is generated in the PDCP304.

[0462] As an example, the first bit group in this application is generated in the PDCP354.

[0463] As an example, the second bit group in this application is generated in the MAC302.

[0464] As an example, the second bit group in this application is generated in the MAC352.

[0465] As an example, the second bit group in this application is generated in the RLC303.

[0466] As an example, the second bit group in this application is generated in the RLC353.

[0467] As an example, the second bit group in this application is generated in the PDCP304.

[0468] As an example, the second bit group in this application is generated in the PDCP354.

[0469] As an example, the third bit group in this application is generated in the MAC302.

[0470] As an example, the third bit group in this application is generated in the MAC352.

[0471] As an example, the third bit group in this application is generated in the RLC303.

[0472] As an example, the third bit group in this application is generated in the RLC353.

[0473] As an example, the fourth bit group in this application is generated in the MAC302.

[0474] As an example, the fourth bit group in this application is generated in the MAC352.

[0475] As an example, the fourth bit group in this application is generated in the RLC303.

[0476] As an example, the fourth bit group in this application is generated in the RLC353.

[0477] As an example, the third bit set in this application is generated in the PDCP304.

[0478] As an example, the third bit set in this application is generated from the PDCP354.

[0479] As an example, the fourth bit set in this application is generated in the PDCP304.

[0480] As an example, the fourth bit set in this application is generated from the PDCP354.

[0481] As an example, the L2 layer 305 or 355 belongs to a higher layer.

[0482] As an example, the RRC sublayer 306 in the L3 layer belongs to a higher layer.

[0483] Example 4

[0484] Example 4 illustrates a hardware module schematic diagram of a communication device according to an embodiment of this application, as shown in the attached diagram. Figure 4 As shown. Figure 4 This is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in the access network.

[0485] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmitting processor 468, a receiving processor 456, a multi-antenna transmitting processor 457, a multi-antenna receiving processor 458, a transmitter / receiver 454, and an antenna 452.

[0486] The second communication device 410 includes a controller / processor 475, a memory 476, a data source 477, a receiver processor 470, a transmitter processor 416, a multi-antenna receiver processor 472, a multi-antenna transmitter processor 471, a transmitter / receiver 418, and an antenna 420.

[0487] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper-layer data packets from the core network or from the data source 477 are provided to the controller / processor 475. The core network and data source 477 represent all protocol layers above the L2 layer. The controller / processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation for the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmitting 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). Transmit processor 416 performs encoding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, and mapping of signal clusters based on various modulation schemes (e.g., Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-Phase Shift Keying (M-PSK), M-QAM). Multi-antenna transmit processor 471 performs digital spatial precoding on the encoded and modulated symbols, including codebook-based and non-codebook-based precoding, and beamforming processing, generating one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domains, and subsequently uses inverse fast Fourier transform (IFFT) to generate a physical channel carrying the time-domain multicarrier symbol stream. Multi-antenna transmit processor 471 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmitter processor 471 into an radio frequency stream, which is then provided to different antennas 420.

[0488] 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 radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream, which is then provided to the receiver processor 456. The receiver processor 456 and the multi-antenna receiver processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiver processor 458 performs receive analog precoding / beamforming operations on the baseband multicarrier symbol stream from the receiver 454. The receiver processor 456 uses a Fast Fourier Transform (FFT) to convert the baseband multicarrier symbol stream after the receive analog precoding / beamforming operations 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 receiver processor 456, where the reference signal is used for channel estimation, and the data signal is recovered in the multi-antenna receiver processor 458 after multi-antenna detection to recover any spatial stream destined for the first communication device 450. Symbols on each spatial stream are demodulated and recovered in the receive processor 456, generating soft decisions. The receive 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 over the physical channel. The upper-layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements L2 layer functions. The controller / processor 459 may be associated with a memory 460 storing program code and data. The memory 460 may be referred to as computer-readable media. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides multiplexing, packet reassembly, decryption, header decompression, and control signal processing between the transport and logical channels to recover higher-layer data packets from the second communication device 410. 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.

[0489] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, upper-layer data packets are provided to the controller / processor 459 using a data source 467. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functions at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between the logical and transport channels, implementing L2 layer functions for the user plane and control plane. The controller / processor 459 is also responsible for retransmitting lost packets and signaling to the second communication device 410. Transmit processor 468 performs modulation mapping and channel coding processing, while multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming processing. Subsequently, transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding / beamforming operations in multi-antenna transmit processor 457, the stream is provided to different antennas 452 via transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by multi-antenna transmit processor 457 into a radio frequency symbol stream before providing it to antenna 452.

[0490] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals into baseband signals, and provides the baseband signals to the multi-antenna receiving processor 472 and the receiving processor 470. The receiving processor 470 and the multi-antenna receiving processor 472 jointly implement the L1 layer function. The controller / processor 475 implements the L2 layer function. The controller / processor 475 may be associated with a memory 476 storing program code and data. The memory 476 may be referred to as computer-readable media. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides multiplexing between the transmission and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper-layer data packets from the first communication device 450. Upper-layer data packets from the controller / processor 475 can be provided to the core network or all protocol layers above the L2 layer, and various control signals can also be provided to the core network or L3 for L3 processing.

[0491] As one embodiment, the first communication device 450 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 with the at least one processor, and the first communication device 450 includes at least: receiving first information via a secondary link; determining a first transmission mode based on at least the first information; transmitting a first bit group using the first transmission mode, the first bit group including at least one bit; wherein the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via a cellular link and transmission via a secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; when all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode transmitted via the secondary link.

[0492] As one embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: receiving first information via a secondary link; determining a first transmission mode based on at least the first information; transmitting a first bit group using the first transmission mode, the first bit group including at least one bit; wherein the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via a cellular link and transmission via a secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; when all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode transmitted via the secondary link.

[0493] As one embodiment, the second communication device 410 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 with the at least one processor. The second communication device 410 at least: transmits first information via a secondary link; transmits a third bit group via a cellular link; receives the first bit group via the secondary link, the first bit group including at least one bit; wherein, at least the first information is used to determine a first transmission mode; the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via a cellular link and transmission via a secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; when all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode transmitted via the secondary link; the third bit group includes the first bit group.

[0494] As one embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: transmitting first information via a secondary link; transmitting a third bit group via a cellular link; and receiving the first bit group via the secondary link, the first bit group including at least one bit; wherein at least the first information is used to determine a first transmission mode; the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via a cellular link and transmission via a secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; when all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode transmitted via the secondary link; and the third bit group includes the first bit group.

[0495] As one embodiment, the second communication device 410 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 with the at least one processor. The second communication device 410 at least: transmits sixth information via a cellular link; receives a first bit group via a cellular link, the first bit group including at least one bit; wherein the sixth information is used to generate third information; the third information is used to configure a third RLC bearer; the third information is used to indicate entering an RRC inactive state; the first bit group is received via the third RLC bearer; the third RLC bearer corresponds to a target bearer; the first bit group belongs to the target bearer.

[0496] As one embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, generates actions including: transmitting sixth information via a cellular link; receiving a first bit group via the cellular link, the first bit group including at least one bit; wherein the sixth information is used to generate third information; the third information is used to configure a third RLC bearer; the third information is used to indicate entering an RRC inactive state; the first bit group is received via the third RLC bearer; the third RLC bearer corresponds to a target bearer; and the first bit group belongs to the target bearer.

[0497] As one embodiment, the first communication device 450 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 with the at least one processor, and the first communication device 450 includes at least: receiving first information via a secondary link, determining a first target RRC state based on at least the first information; receiving a first bit set via the secondary link; sending second information; generating a second bit set, and sending the second bit set via a cellular link, the second bit set including the first bit set; wherein the first target RRC state is one of an RRC inactive state and an RRC connected state; the second information is used to indicate the first target RRC state.

[0498] As one embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program, which generates actions when executed by at least one processor, the actions including: receiving first information via a secondary link; determining a first target RRC state based on at least the first information; receiving a first bit set via the secondary link; sending second information; generating a second bit set; and sending the second bit set via a cellular link, the second bit set including the first bit set; wherein the first target RRC state is one of an RRC inactive state and an RRC connected state; and the second information is used to indicate the first target RRC state.

[0499] As one embodiment, the second communication device 410 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 with the at least one processor. The second communication device 410 at least: transmits first information via a secondary link, at least the first information being used to determine a first target RRC state; transmits a first bit set via the secondary link; wherein, second information is transmitted; a second bit set is generated, the second bit set being transmitted via a cellular link, the second bit set including the first bit set; the first target RRC state is one of an RRC inactive state and an RRC connected state; the second information is used to indicate the first target RRC state.

[0500] As one embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: transmitting first information via a secondary link, at least the first information being used to determine a first target RRC state; transmitting a first bit set via the secondary link; wherein second information is transmitted; a second bit set is generated and transmitted via a cellular link, the second bit set including the first bit set; the first target RRC state is one of an RRC inactive state and an RRC connected state; and the second information is used to indicate the first target RRC state.

[0501] As one embodiment, the first communication device 450 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 with the at least one processor, and the first communication device 450 at least: receives first information via a secondary link; receives sixth information via a cellular link; receives a first bit set via the secondary link; transmits seventh information via the secondary link; transmits second information; generates a second bit set, and transmits the second bit set via the cellular link, the second bit set including the first bit set; wherein the sixth information is used to generate the seventh information; the seventh information is used to generate the first information; the second information is used to indicate a first target RRC state, the first target RRC state being one of an RRC inactive state and an RRC connected state.

[0502] As one embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program that generates actions when executed by at least one processor, the actions including: receiving first information via a secondary link; receiving sixth information via a cellular link; receiving a first bit set via the secondary link; transmitting seventh information via the secondary link; transmitting second information; generating a second bit set; transmitting the second bit set via the cellular link, the second bit set including the first bit set; wherein the sixth information is used to generate the seventh information; the seventh information is used to generate the first information; the second information is used to indicate a first target RRC state, the first target RRC state being one of an RRC inactive state and an RRC connected state.

[0503] As one embodiment, the second communication device 410 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 with the at least one processor. The second communication device 410 at least: transmits first information via a secondary link; transmits a first bit set via the secondary link; receives seventh information via the secondary link; wherein the sixth information is received via a cellular link; the sixth information is used to generate the seventh information; the seventh information is used to generate the first information; second information is transmitted; a second bit set is generated, the second bit set is transmitted via the cellular link, the second bit set including the first bit set; the second information is used to indicate a first target RRC state, the first target RRC state being one of an RRC inactive state and an RRC connected state.

[0504] As one embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, generates actions including: transmitting first information via a secondary link; transmitting a first bit set via the secondary link; receiving seventh information via the secondary link; wherein the sixth information is received via a cellular link; the sixth information is used to generate the seventh information; the seventh information is used to generate the first information; second information is transmitted; a second bit set is generated and transmitted via the cellular link, the second bit set including the first bit set; the second information is used to indicate a first target RRC state, the first target RRC state being one of an RRC inactive state and an RRC connected state.

[0505] As an example, the first communication device 450 corresponds to the first node in this application, and the second communication device 410 corresponds to the second node in this application.

[0506] As an example, the first communication device 450 corresponds to the first node in this application, and the second communication device 410 corresponds to the third node in this application.

[0507] As an example, the first communication device 450 corresponds to the second node in this application, and the second communication device 410 corresponds to the third node in this application.

[0508] As an example, the first communication device 450 is a relay node.

[0509] As an example, the first communication device 450 is a UE.

[0510] As an example, the first communication device 450 is an RSU (Road Side Unit).

[0511] As one embodiment, the second communication device 410 is a relay node.

[0512] As one embodiment, the second communication device 410 is a base station.

[0513] As an example, the second communication device 410 is an RSU.

[0514] As one embodiment, the second communication device 410 is a UE.

[0515] As an example, the third communication device 410 is a base station.

[0516] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the first information in this application.

[0517] As one embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the first information in this application.

[0518] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmission processor 457, the transmission processor 468, or the controller / processor 459 is used to transmit the first bit group in this application.

[0519] As one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, or the controller / processor 475 is used to receive the first bit group in this application.

[0520] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the third information in this application.

[0521] As one embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the third information in this application.

[0522] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the second bit group in this application.

[0523] As one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, or the controller / processor 475 is used to receive the second bit group in this application.

[0524] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the second information in this application.

[0525] As an example, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the second information in this application.

[0526] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the fifth information in this application.

[0527] As an example, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the fifth information in this application.

[0528] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the fourth bit group in this application.

[0529] As one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiver processor 472, the receiver processor 470, or the controller / processor 475 is used to receive the fourth bit group in this application.

[0530] As an example, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the sixth information in this application.

[0531] As an example, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the sixth information in this application.

[0532] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the fourth information in this application.

[0533] As one embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the fourth information in this application.

[0534] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the third bit group in this application.

[0535] As one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, or the controller / processor 475 is used to receive the third bit group in this application.

[0536] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the first bit set in this application.

[0537] As an example, at least one of the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, or the controller / processor 475 is used to transmit the first set of bits in this application.

[0538] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the second information in this application.

[0539] As an example, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, or the controller / processor 475 is used to receive the second information in this application.

[0540] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmission processor 457, the transmission processor 468, or the controller / processor 459 is used to transmit the second set of bits in this application.

[0541] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the third information in this application.

[0542] As one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, or the controller / processor 475 is used to receive the third information in this application.

[0543] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the fourth information in this application.

[0544] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the third bit set in this application.

[0545] As one embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmission processor 471, the transmission processor 416, or the controller / processor 475 is used to transmit the third bit set in this application.

[0546] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the fourth bit set in this application.

[0547] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the seventh information in this application.

[0548] As an example, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, or the controller / processor 475 is used to receive the seventh information in this application.

[0549] Example 5A

[0550] Example 5A illustrates a wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 5A As shown. In the appendix Figure 5A In the process, the first node U51A and the second node U52A communicate through the PC5 air interface; the second node U52A and the third node N53A communicate through the Uu air interface.

[0551] for First node U51 A. In step S511A, the second information is received; in step S512A, the second bit group is sent; in step S513A, the third information is received; in step S514A, the first information is received; and in step S515A, the first bit group is sent through the secondary link.

[0552] for Second node U52 A. In step S521A, the fifth information is received; in step S522A, the second information is sent; in step S523A, the second bit group is received; in step S524A, the fourth bit group is sent; in step S525A, the sixth information is received; in step S526A, the third information is sent; in step S527A, the fourth information is received; in step S528A, the first information is sent; in step S529A, the first bit group is received through the secondary link; in step S5210A, the third bit group is sent through the cellular link.

[0553] for Third node N53 A. In step S531A, the fifth information is sent; in step S532A, the fourth bit group is received; in step S533A, the sixth information is sent; in step S534A, the fourth information is sent; and in step S535A, the third bit group is received via the cellular link.

[0554] In one embodiment, the second node is the sender of the first information.

[0555] As an example, the serving base station of the first node and the serving base station of the second node are the same.

[0556] As an example, the serving base station of the first node and the serving base station of the second node are different.

[0557] As one example, the first information includes the RRC connection status.

[0558] As one embodiment, the first information includes the candidate transmission mode transmitted via the secondary link.

[0559] As one embodiment, the first set of conditions includes the first information including the RRC connection (RRC_Connected) status.

[0560] As one embodiment, the first condition set includes the first information including the RRC connection status, and includes the first information indicating the candidate transmission mode transmitted via the secondary link.

[0561] As one example, the first information includes a first threshold.

[0562] As an example, the first threshold is represented in bytes.

[0563] As an example, the first threshold is a fixed value.

[0564] As an example, the first threshold is a variable value.

[0565] As an example, the value of the first threshold is determined by the second node.

[0566] As an example, the value of the first threshold is not greater than the value of the second threshold.

[0567] As an example, the value of the first threshold is less than the value of the second threshold.

[0568] As one example, the value of the first threshold is the difference between the value of the second threshold and the first offset value.

[0569] As an example, the first offset value is the size of the ADAPT (adapter) subhead.

[0570] As an example, the first offset value is the size reserved for MAC SDUs belonging to RLC bearers other than the first RLC bearer in the fourth RLC bearer set.

[0571] As one embodiment, the first information includes a first threshold; the first condition set includes the fact that the amount of data in the first bit set is not less than the first threshold.

[0572] As one embodiment, the first information includes a first threshold; the first condition set includes the data amount of the first bit set being higher than the first threshold.

[0573] As one embodiment, the first information includes a first threshold; the first condition set includes the data amount of the first bit set not being less than the first threshold, and includes the first information indicating the candidate transmission mode transmitted through the secondary link.

[0574] As one embodiment, the first information includes a first threshold; the first condition set includes the data amount of the first bit set being higher than the first threshold, and includes the first information indicating the candidate transmission mode transmitted via the secondary link.

[0575] As an example, when the first information includes the RRC connection status, the first transmission mode is determined to be transmission via the secondary link.

[0576] As an example, when the first information includes the RRC connection status and the amount of data in the first bit set is not less than the second threshold, the first transmission mode is determined to be transmission via the secondary link.

[0577] As an example, when the first information includes the RRC connection status and the amount of data in the first bit set is greater than the second threshold, the first transmission mode is determined to be transmission via the secondary link.

[0578] As an example, when the first information includes the RRC connection status and the amount of data in the first bit set is less than the second threshold, the first transmission mode is determined to be transmission via cellular link.

[0579] As an example, when the first information includes the first threshold and the amount of data in the first bit set is not less than the first threshold, the first transmission mode is determined to be transmission via the secondary link.

[0580] As an example, when the first information includes the first threshold and the amount of data in the first bit set is greater than the first threshold, the first transmission mode is determined to be transmission via the secondary link.

[0581] As an example, when the first information includes the first threshold and the amount of data in the first bit set is less than the first threshold, the first transmission mode is determined to be transmission via cellular link.

[0582] As an example, when the first information includes the RRC connection status and the cellular link channel status is worse than the secondary link channel status, the first transmission mode is determined to be transmission via the secondary link.

[0583] As an example, when the first information includes the RRC connection status, and the cellular link channel status is worse than a first reference value and the secondary link channel status is better than a second reference value, the first transmission mode is determined to be transmission via the secondary link.

[0584] As an example, when the first information includes the first threshold, and the amount of data in the first bit set is not less than the first threshold, and the cellular link channel state is worse than the secondary link channel state, the first transmission mode is determined to be transmission via the secondary link.

[0585] As an example, when the first information includes the first threshold, and the amount of data in the first bit set is greater than the first threshold, and the cellular link channel state is worse than the secondary link channel state, the first transmission mode is determined to be transmission via the secondary link.

[0586] As an example, when the first information includes the first threshold, and the amount of data in the first bit set is less than the first threshold, and the secondary link channel state is worse than the cellular link channel state, the first transmission mode is determined to be transmission via cellular link.

[0587] As an example, when the first information includes the RRC connection status, and the data amount of the first bit set is not less than the second threshold, and the cellular link channel status is worse than the secondary link channel status, the first transmission mode is determined to be transmission via the secondary link.

[0588] As an example, the phrase "the cellular link channel state is worse than the secondary link channel state" includes: the RSRP value of the cellular link is less than the RSRP value of the secondary link.

[0589] As an example, the phrase "the secondary link channel state is worse than the cellular link channel state" includes: the RSRP value of the secondary link is less than the RSRP value of the cellular link.

[0590] As an example, the first reference value and the second reference value are respectively configured by the network.

[0591] As an example, the first reference value and the second reference value are pre-configured.

[0592] As one embodiment, the first bit set includes the first bit group.

[0593] As an example, all bits included in the first bit set belong to the first bit group.

[0594] As an example, at least one bit included in the first bit set does not belong to the first bit group.

[0595] As an example, the first set of bits is transmitted by the first transmission mode.

[0596] As an example, the bits in the first bit set other than the first bit group are transmitted by a transmission mode other than the first transmission mode.

[0597] As an example, the first bit set includes all currently cached bits.

[0598] As an example, the first bit set includes all bits currently cached in the MAC sublayer.

[0599] As an example, the first bit set includes all bits currently cached in the MAC sublayer and RLC sublayer.

[0600] As an example, the first bit set includes all bits currently cached in the MAC sublayer, RLC sublayer, and PDCP sublayer.

[0601] As an example, when the first transmission mode is transmission via a secondary link, the first bit group is transmitted via a first RLC bearer.

[0602] As an example, the first RLC bearer is identified by a first logical channel identity (LCID).

[0603] As an example, when the first transmission mode is transmission via a secondary link, the transmission of the first bit group via the first RLC bearer includes: the first bit group includes the first logical channel identifier.

[0604] As an example, when the first transmission mode is transmission via a secondary link, transmitting the first bit group via the first RLC bearer includes: activating the first RLC bearer before transmitting the first bit group via the first RLC bearer.

[0605] As one embodiment, the first RLC bearer is used for secondary link transmission between the first node and the sender of the first information.

[0606] As an example, when the first transmission mode is transmission via cellular link, the first bit group is transmitted via a third RLC bearer.

[0607] As an example, the first RLC bearer and the third RLC bearer correspond to the target bearer, respectively.

[0608] As an example, the first RLC bearer corresponds to the target bearer.

[0609] As an example, the third RLC bearer corresponds to the target bearer.

[0610] As an example, the phrase "the first RLC bearer and the target bearer correspondence" includes: the configuration information of the first RLC bearer includes a target bearer identifier that identifies the target bearer; the target bearer is a radio bearer served by the first RLC bearer.

[0611] As an example, the phrase "the first RLC bearer and the target bearer correspond" includes: the first RLC bearer is a lower layer part of the target bearer.

[0612] As one embodiment, the lower layer portion includes at least the former of an RLC sublayer or a MAC sublayer.

[0613] As an example, the phrase corresponding to the third RLC bearer and the target bearer includes: the configuration information of the third RLC bearer includes a target bearer identifier that identifies the target bearer; the target bearer is a radio bearer served by the third RLC bearer.

[0614] As an example, the phrase "the third RLC bearer and the target bearer correspond to each other" includes: the third RLC bearer is the lower layer part of the target bearer.

[0615] As an example, the target bearer is a Data Radio Bearer (DRB).

[0616] As an example, the target bearer is a Signaling Radio Bearer (SRB).

[0617] As an example, the signaling radio bearer is SRB0.

[0618] As an example, the signaling radio bearer is SRB1.

[0619] As an example, the signaling radio bearer is SRB2.

[0620] As an example, the signaling radio bearer is SRB3.

[0621] As an example, the target bearer belongs to the EPS (Evolved Packet Switched System) bearer.

[0622] As an example, the target bearer belongs to the E-RAB (E-UTRAN radio access bearer, evolved UMTS (Universal Mobile Telecommunication System) terrestrial radio access network radio access bearer) bearer.

[0623] As an example, the first bit group belongs to the target bearer.

[0624] As one embodiment, the first bit group belonging to the target bearer includes: the first bit group being sent through the target bearer.

[0625] As an example, the first set of bits belongs to the target bearer.

[0626] As an example, at least one bit in the first bit set does not belong to the target bearer.

[0627] As one example, the third node sends the fifth information to the second node via a cellular link.

[0628] As an example, the fifth piece of information includes at least one RRC (Record of Responsible Transaction) information.

[0629] As an example, the fifth information includes first RRC information and second RRC information, wherein the first RRC information and the second RRC information belong to different MAC PDUs.

[0630] As an example, the first RRC information and the second RRC information each include all or part of the IE (Information Element) in an RRC information.

[0631] As an example, the first RRC information and the second RRC information each include all or part of the fields in an IE of an RRC information.

[0632] As an example, the first RRC information and the second RRC information respectively include RRCReconfiguration.

[0633] As an example, the first RRC information includes RRCSetup (RRC setup), and the second RRC information includes RRCReconfiguration (RRC reconfiguration).

[0634] As an example, the fifth piece of information includes the RLC-BearerConfig field.

[0635] As an example, the fifth piece of information is used to generate the second piece of information.

[0636] As an example, at least one RRC information included in the fifth information is used to generate the second information.

[0637] As an example, the first RRC information included in the fifth information is used to generate the second information.

[0638] As an example, the target recipient of the first RRC information included in the fifth information is the first node.

[0639] As one embodiment, the phrase "the fifth information" being used to generate the second information includes: the fifth information including the second information.

[0640] As an example, the phrase "the fifth information is used to generate the second information" includes: the first RRC information included in the fifth information is used to generate the second information.

[0641] As one example, the second node sends the second information via a secondary link.

[0642] As one example, the second information includes an RRC message.

[0643] As one embodiment, the second information includes all or part of the IE (Information Element) in an RRC message.

[0644] As one embodiment, the second information includes all or part of the fields in an IE of an RRC message.

[0645] As an example, the name of the second information includes relay.

[0646] As one example, the second information includes RRCSetup (RRC setup).

[0647] As one example, the second information includes RRCReconfiguration.

[0648] As one example, the second information includes the RLC-BearerConfig field.

[0649] As one embodiment, the second information includes the RLC configuration of the first RLC bearer and the logical channel configuration of the first RLC bearer.

[0650] As an example, the RLC configuration includes at least an RLC operating mode.

[0651] As an example, the logical channel configuration includes at least priority.

[0652] As one embodiment, the second information includes the first logical channel identifier and the target bearer identifier.

[0653] As an example, the target bearer identifier is drb-Identity (DRB identifier).

[0654] As an example, the target bearer identifier is srb-Identity (SRB identifier).

[0655] As an example, the target bearer identifier is eps-BearerIdentity (eps bearer identifier).

[0656] As one embodiment, the phrase "the second information is used to configure the first RLC bearer" includes: the second information is used by the first node to configure the first RLC bearer.

[0657] As one embodiment, the phrase "second information" is used to configure the first RLC bearer to include: the RLC entity of the first RLC bearer is established on the first node.

[0658] As an example, the fifth information is used to configure the first RLC bearer and the second RLC bearer.

[0659] As an example, the phrase "the fifth information is used to configure the first RLC bearer and the second RLC bearer" includes: the second RRC information included in the fifth information is used to configure the first RLC bearer and the second RLC bearer.

[0660] As an example, the second RRC information includes an RRC message.

[0661] As one embodiment, the second RRC information includes all or part of the IE (Information Element) in an RRC information.

[0662] As an example, the second RRC information includes all or part of the fields in an IE of an RRC information.

[0663] As one example, the second RRC information includes RRCReconfiguration.

[0664] As an example, the phrase "fifth information" used to configure the first RLC bearer and the second RLC bearer includes: the fifth information includes the RLC configuration of the first RLC bearer and the logical channel configuration of the first RLC bearer, and includes the RLC configuration of the second RLC bearer and the logical channel configuration of the second RLC bearer.

[0665] As an example, the second RRC information included in the fifth information includes the first logical channel identifier, the second logical channel identifier, and the target bearer identifier.

[0666] As one embodiment, the second RLC bearer is identified by the second logical channel identifier.

[0667] As an example, the target recipient of the second RRC information included in the fifth information is the second node.

[0668] As one embodiment, the phrase "the fifth information is used to configure the first RLC bearer and the second RLC bearer" includes: the fifth information is used by the second node to configure the first RLC bearer and the second RLC bearer.

[0669] As an example, the fifth information in the phrase is used to configure the first RLC bearer and the second RLC bearer, including: the RLC entity of the first RLC bearer and the RLC entity of the second RLC bearer are respectively established on the second node.

[0670] As an example, the phrase corresponding to the second RLC bearer and the target bearer includes: the configuration information of the second RLC bearer includes a target bearer identifier that identifies the target bearer; the target bearer is a radio bearer served by the second RLC bearer.

[0671] As an example, the phrase "the second RLC bearer and the target bearer correspond to" includes: the second RLC bearer is a lower layer part of the target bearer.

[0672] As one embodiment, the first node receives the second information before sending the second bit group.

[0673] As one example, the third node transmits the second information via a cellular link.

[0674] As an example, the first node receives the second information via a downlink.

[0675] As an example, the first node sends the second bit group via a secondary link before receiving the first information.

[0676] As an example, the first node is in an RRC connection state when sending the second bit group.

[0677] As one embodiment, the second bit group includes at least one bit.

[0678] As one example, the second bit group includes at least one byte.

[0679] As one embodiment, the second bit group comprises a positive integer number of bits.

[0680] As an example, the second bit group includes at least one RLC SDU.

[0681] As an example, the second bit group includes at least one PDCP SDU.

[0682] As an example, the second bit group includes at least one MAC SDU.

[0683] As an example, the second bit group includes at least one MAC PDU.

[0684] As one example, the target receiver of the second bit group is a network device.

[0685] As one example, the target receiver of the second bit group is the third node.

[0686] As an example, the fourth bit group includes the second bit group.

[0687] As an example, the second bit group is used to generate the fourth bit group.

[0688] As an example, the fourth bit group includes at least one RLC SDU.

[0689] As an example, the fourth bit group includes at least one MAC PDU.

[0690] As one embodiment, the second node transmits the fourth bit group via the cellular link after receiving the fifth information and before receiving the sixth information.

[0691] As an example, the third node receives the fourth bit group after sending the fifth information and before sending the sixth information.

[0692] As an example, the fifth message is sent earlier than the sixth message.

[0693] As one example, the third node transmits the sixth information via a cellular link.

[0694] As an example, the sixth piece of information includes an RRC message.

[0695] As an example, the sixth information includes all or part of the IE (Information Element) in an RRC message.

[0696] As an example, the sixth information includes all or part of the fields in an IE of an RRC message.

[0697] As an example, the sixth piece of information includes RRC Relase (RRC release).

[0698] As an example, the sixth information includes RRCReleaseIE (RRC Release Information Element).

[0699] As an example, the sixth information is used to generate the third information.

[0700] As an example, the sixth information includes the RRCreaseIE and rlc-BearerToAddModList fields.

[0701] As an example, the sixth information includes the RRCreaseIE and RLC-BearerConfig fields.

[0702] As an example, the third information includes only one RRC message.

[0703] As an example, the third information is an RRC message.

[0704] As an example, the third information includes all or part of the IE (Information Element) in an RRC message.

[0705] As an example, the third information includes all or part of the fields in an IE of an RRC message.

[0706] As an example, the third information includes RRCrease.

[0707] As an example, the third information includes RRRCReleaseIE.

[0708] As an example, the third information includes an RRC information field that includes RRCReleaseIE and the rlc-BearerToAddModList (RLC - Bearer Add Modification List) field.

[0709] As an example, the third information includes RRC information comprising RRCReleaseIE and the RLC-BearerConfig field.

[0710] As one embodiment, the third information is sent via a secondary link before sending the first information and after receiving the second bit group.

[0711] As an example, the third information is used to configure the third RLC bearer of the first node.

[0712] As an example, the phrase "third information" used to configure the third RLC bearer includes: the third information includes the RLC configuration of the third RLC bearer and the logical channel configuration of the third RLC bearer.

[0713] As one embodiment, the third information includes a third logical channel identifier and the target bearer identifier.

[0714] As one embodiment, the phrase "the third information is used to configure the third RLC bearer" includes: the third information being used by the first node to configure the third RLC bearer.

[0715] As an example, the phrase "third information" being used to configure the third RLC bearer includes: the first node maintaining the RLC configuration parameters of the third RLC bearer.

[0716] As an example, the third information in the phrase is used to configure the third RLC bearer to include: the RLC entity of the third RLC bearer is not established on the first node.

[0717] As one example, the third information is used to instruct the first node to enter an RRC inactive state.

[0718] As an example, the third information includes a suspendConfig field; the suspendConfig field indicates the suspended UE context of the first node in an RRC inactive state.

[0719] As an example, the third information includes a suspendConfig field; the suspendConfig field indicates at least one of fullI-RNTI (Full Inactive - Temporary Identifier for Wireless Networks) and shortI-RNTI (Short Inactive - Temporary Identifier for Wireless Networks).

[0720] As an example, the third information used to instruct the first node to enter the RRC inactive state includes: the first node resetting the MAC and releasing the MAC cellgroup configuration.

[0721] As one embodiment, the third information used to instruct the first node to enter the RRC inactive state includes: suspending the first RLC bearer.

[0722] As an example, the third information used to instruct the first node to enter the RRC inactive state includes: suspending all signaling radio bearers and data radio bearers except for signaling radio bearer 0 (SRB0).

[0723] As one embodiment, the third information used to instruct the first node to enter the RRC inactive state includes: instructing the lower layers of all data radio bearers to suspend PDCP.

[0724] As one embodiment, the third information used to instruct the first node to enter the RRC inactive state includes: instructing the upper layer to suspend the RRC connection.

[0725] As one embodiment, the lower layer includes at least one of an RLC sublayer, a MAC sublayer, or a PHY layer.

[0726] As an example, the third information in the phrase is used to indicate that the first node enters the RRC inactive state, including indicating that it is allowed for the target bearer to perform small data transmissions when the first node is in the RRC inactive state.

[0727] As an example, the third information in the phrase being used to indicate that the first node enters the RRC inactive state includes: indicating that it is permissible for the first RLC bearer to perform small data transmissions while the first node is in the RRC inactive state.

[0728] As an example, the phrase "third information" used to indicate that the first node enters the RRC inactive state includes: indicating that the establishment of the third RLC bearer is permitted while the first node is in the RRC inactive state.

[0729] As an example, the third information in the phrase used to indicate that the first node enters the RRC inactive state includes indicating that the target bearer is allowed to transmit through the cellular link when the first node is in the RRC inactive state.

[0730] As an example, the phrase indicating that the third information is used to indicate that the first node enters the RRC inactive state includes: indicating that the establishment of the third RLC bearer is permitted and indicating that the third RLC bearer is allowed to be transmitted via the cellular link while the first node is in the RRC inactive state.

[0731] As an example, a fourth message is sent via a cellular link; the fourth message is sent after the sixth message.

[0732] As an example, the time interval between the sending time of the fourth information and the sending time of the sixth information is not less than a first threshold.

[0733] As an example, the first threshold is 6 milliseconds.

[0734] As an example, the first threshold is 10 milliseconds.

[0735] As an example, the first threshold is 16 milliseconds.

[0736] As an example, the second node receives the fourth information after sending the third information.

[0737] As one embodiment, the third node sends the fourth information after the second node sends the third information.

[0738] As an example, the fourth information includes an RRC message.

[0739] As one example, the fourth information includes all or part of the IE (Information Element) in an RRC message.

[0740] As an example, the fourth information includes all or part of the fields in an IE of an RRC message.

[0741] As one example, the fourth information includes RRCReconfiguration.

[0742] As an example, the fourth information includes RRCrease.

[0743] As an example, the fourth information includes the RLC-ToSuspend (RLC pause) field.

[0744] As one embodiment, the fourth information includes the first logical channel identifier.

[0745] As an example, the fourth information is used to indicate that the first RLC bearer is suspended.

[0746] As an example, suspending the phrase RLC bearer includes: the RLC entity of the RLC bearer being released.

[0747] As an example, the fourth information is used to indicate that the second RLC bearer is suspended.

[0748] As an example, the fourth information is used to implicitly indicate that the second RLC bearer is suspended.

[0749] As an example, the first RLC bearer belongs to the fourth RLC bearer set; the fourth RLC bearer set includes at least one RLC bearer.

[0750] As an example, the fourth RLC bearer set is mapped to the second RLC bearer.

[0751] As an example, any RLC bearer in the fourth RLC bearer set is mapped to the second RLC bearer.

[0752] As an example, any RLC bearer in the fourth RLC bearer set is an I-RLC bearer.

[0753] As one embodiment, the second RLC bearer is an outgoing RLC bearer.

[0754] As an example, the first RLC bearer and the second RLC bearer are used in the second node for relay transmission of the target bearer.

[0755] As an example, all RLC bearers in the fourth RLC bearer set are suspended.

[0756] As an example, the phrase "all RLC bearers in the fourth RLC bearer set are suspended" includes: all RLC entities corresponding to all RLC bearers in the fourth RLC bearer set are released; any RLC bearer in the fourth RLC bearer set corresponds to one RLC entity.

[0757] As one embodiment, the phrase indicating that the fourth information is used to implicitly indicate that the second RLC bearer is suspended includes: the fourth information indicating that the first RLC bearer is suspended; the first RLC bearer belongs to the fourth RLC bearer set; the fourth RLC bearer set is mapped to the second RLC bearer; and the second RLC bearer is suspended when all RLC bearers in the fourth RLC bearer set are suspended.

[0758] As one example, the second node sends the first information via a secondary link.

[0759] As an example, the first node transmits the first bit group using the candidate transmission mode via the secondary link; the second node receives the first bit group via the secondary link.

[0760] As one embodiment, receiving the first bit group via the secondary link includes: the second node receiving the first bit group, determining that the first bit group belongs to the first RLC bearer based on the first logical channel identifier included in the first bit group, and activating the first RLC bearer.

[0761] As an example, activating the RLC bearer with the phrase includes establishing an RLC entity based on the configuration of the RLC bearer.

[0762] As one example, the second node transmits the third bit group via a cellular link.

[0763] As an example, the third bit group is transmitted via the second RLC bearer.

[0764] As one embodiment, sending the third bit group via the second RLC bearer includes: activating the second RLC bearer before sending the third bit group.

[0765] As one embodiment, the second RLC bearer is used for cellular link transmission between the second node and the serving base station of the second node.

[0766] As one embodiment, the third bit group includes the second logical channel identifier.

[0767] As an example, the third bit group includes at least one RLC SDU.

[0768] As an example, the third bit group includes at least one MAC PDU.

[0769] As an example, the third bit group includes the first bit group.

[0770] As an example, the first bit group is used to generate the third bit group.

[0771] As an example, the target receiver of the first bit group is a network device.

[0772] As an example, the target receiver of the first bit group is the third node.

[0773] As an example, the first node is in an RRC inactive state when sending the first bit group.

[0774] Example 5B

[0775] Example 5B illustrates a first wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 5B As shown. In the appendix Figure 5B In the process, the first node U52B and the second node U51B communicate via the PC5 air interface; the first node U52B and the third node N53B communicate via the Uu air interface.

[0776] for Second node U51B In step S511 B The system receives the seventh information in step S512B; sends the third bit set in step S513B; sends the first information in step S514B; receives the third information in step S514B; and sends the first bit set in step S515B.

[0777] for First node U52BIn step S521B, the sixth information is received; in step S522B, the seventh information is sent; in step S523B, the third bit set is received; in step S524B, the fourth bit set is sent; in step S525B, the fifth information is received; in step S526B, the first information is received; in step S527B, the second information is sent; in step S528B, the third information is sent; in step S529B, the first bit set is received; and in step S5210B, the second bit set is sent.

[0778] for Third node N53B In step S531B, the sixth information is sent; in step S532B, the fourth bit set is received; in step S533B, the fifth information is sent; in step S534B, the second information is received; and in step S535B, the second bit set is received.

[0779] As an example, the sixth information is received via the downlink.

[0780] As an example, the sixth information indicates the available relay modes of the first node.

[0781] As an example, the sixth information explicitly indicates the available relay mode of the first node.

[0782] As an example, the sixth information implicitly indicates the available relay mode of the first node.

[0783] As an example, the sixth information implicitly indicates the available relay mode of the first node as L2 relay by configuring the ADAPT sublayer of the first node.

[0784] As an example, the sixth information carries the available relay mode of the first node.

[0785] As an example, the sixth information is generated in the RRC (Radio Resource Control) sublayer.

[0786] As an example, the sixth piece of information includes RRC information.

[0787] As one example, the sixth information includes all or part of the IE in an RRC message.

[0788] As an example, the sixth information includes all or part of the fields in an IE of an RRC message.

[0789] As an example, the name of the sixth piece of information includes relay.

[0790] As an example, the sixth piece of information is RRCReconfiguration.

[0791] As an example, the first node determines the first target RRC status based on the sixth information and the first information.

[0792] As an example, the first node determines the first target RRC status based on the available relay mode of the first node indicated by the sixth information and the relay mode indicated by the first information.

[0793] As an example, when the relay mode available to the first node indicated by the sixth information is at least the former of L2 relay or L3 relay, and the relay mode indicated by the first information is L2 relay, the first target RRC state is determined to be the RRC connection state.

[0794] As an example, when the relay mode available to the first node indicated by the sixth information is at least the former of L3 relay or L2 relay, and the relay mode indicated by the first information is L3 relay, the first target RRC state is determined to be the RRC connection state.

[0795] As an example, when the relay mode available to the first node indicated by the sixth information is at least the former of L3 relay or L2 relay, and the relay mode indicated by the first information is L3 relay, the first target RRC state is determined to be the RRC inactive state.

[0796] As an example, when the relay mode available to the first node indicated by the sixth information is the L2 relay, and the relay mode indicated by the first information is both the L2 relay and the L3 relay, the first target RRC state is determined to be the RRC connection state.

[0797] As an example, when the relay mode available to the first node indicated by the sixth information is the L3 relay, and the relay mode indicated by the first information is both the L2 relay and the L3 relay, the first target RRC state is determined to be the RRC connection state.

[0798] As an example, when the relay mode available to the first node indicated by the sixth information is the L3 relay, and the relay mode indicated by the first information is both the L2 relay and the L3 relay, the first target RRC state is determined to be the RRC inactive state.

[0799] As an example, the first node determines the first target RRC status based on the relay mode available to the first node indicated by the sixth information and the signaling type included in the first information; the signaling type includes either the PC5 signaling or the Uu signaling.

[0800] As an example, when the relay mode available to the first node indicated by the sixth information is at least one of L2 relay or L3 relay, and the first information is PC5 signaling, the first target RRC state is determined to be the RRC connection state.

[0801] As an example, when the relay mode available to the first node indicated by the sixth information is at least one of L2 relay or L3 relay, and the first information is PC5 signaling, the first target RRC state is determined to be the RRC inactive state.

[0802] As an example, when the relay mode available to the first node indicated by the sixth information is at least one of L2 relay or L3 relay, and the first information is Uu signaling, the first target RRC state is determined to be the RRC connection state.

[0803] As an example, when the relay mode available to the first node indicated by the sixth information is at least one of L2 relay or L3 relay, and the first information is Uu signaling, the first target RRC state is determined to be the RRC inactive state.

[0804] As an example, when the relay mode available to the first node indicated by the sixth information is at least one of the L2 relay or the L3 relay, and the first information is RRCSetupRequest, the first target RRC state is determined to be the RRC connection state.

[0805] As an example, when the available relay mode of the first node indicated by the sixth information is at least one of L2 relay or L3 relay, and the first information is either RRC Resume Request or RRC Resume Request 1, the first target RRC state is determined to be the RRC connection state.

[0806] As an example, when the available relay mode of the first node indicated by the sixth information is at least one of the L2 relay or the L3 relay, and the first information is either RRCResumeRequest or RRCResumeRequest1, the first target RRC state is determined to be the RRC inactive state.

[0807] As an example, the seventh information is sent via a secondary link.

[0808] As one example, the recipient of the seventh information and the sender of the first information share the same address.

[0809] As one example, the seventh information indicates the relay mode supported by the first node.

[0810] As an example, the available relay mode indicated by the sixth information includes the supported relay mode indicated by the seventh information.

[0811] As an example, the available relay modes of the first node indicated by the sixth information include the supported relay modes of the first node indicated by the seventh information.

[0812] As an example, the seventh information explicitly indicates the relay mode supported by the first node.

[0813] As an example, the seventh piece of information implicitly indicates the relay mode supported by the first node.

[0814] As an example, the seventh information carries the relay mode supported by the first node.

[0815] As an example, the seventh information is generated in the PC5-RRC sublayer.

[0816] As an example, the seventh piece of information includes PC5-RRC information.

[0817] As one example, the seventh information includes all or part of the IE in a PC5-RRC message.

[0818] As an example, the seventh information includes all or part of the fields in an IE of a PC5-RRC message.

[0819] As an example, the name of the seventh piece of information includes relay.

[0820] As an example, the seventh piece of information is RRCReconfigurationSidelink (RRC reconfiguration of the secondary link).

[0821] As an example, the sender of the first information generates the first information based on the seventh information.

[0822] As an example, when the seventh information indicates that the relay mode supported by the first node is the L2 relay, the first information includes PC5 signaling.

[0823] As an example, when the seventh information indicates that the relay mode supported by the first node is the L2 relay, the first information includes Uu signaling.

[0824] As an example, when the seventh information indicates that the relay mode supported by the first node is the L3 relay, the first information includes PC5 signaling.

[0825] As an example, when the seventh information indicates that the relay mode supported by the first node is the L3 relay, the first information includes Uu signaling.

[0826] As an example, when the seventh information indicates that the relay mode supported by the first node is the L2 relay, the first information indicates the L2 relay.

[0827] As an example, when the seventh information indicates that the relay mode supported by the first node is the L3 relay, the first information indicates the L3 relay.

[0828] As an example, a third set of bits is received via a secondary link before the first information is received.

[0829] As one example, the sender of the third bit set shares an address with the sender of the first information.

[0830] As an example, the third set of bits belongs to the Data Radio Bearer (DRB).

[0831] As an example, the third bit set and the first bit set belong to the same data radio bearer.

[0832] As an example, the third bit set and the first bit set belong to different data radio bearers.

[0833] As an example, the fourth bit set is generated and transmitted via the uplink before receiving the first information.

[0834] As an example, the fourth bit set includes the third bit set.

[0835] As an example, the fourth bit set belongs to the data radio bearer.

[0836] As an example, the fourth bit set includes at least one byte other than the third bit set.

[0837] As an example, the fourth bit set and the third bit set each include at least one byte.

[0838] As an example, the fourth bit set and the third bit set each include a positive integer number of bits.

[0839] As an example, the fourth bit set and the third bit set each include at least one RLCSDU.

[0840] As an example, the fourth bit set and the third bit set each include at least one PDCPSDU.

[0841] As an example, the fourth bit set and the second bit set belong to the same data radio bearer.

[0842] As an example, the fourth bit set and the second bit set belong to different data radio bearers.

[0843] As one embodiment, the fifth information is received via the downlink before the first information is received and after the fourth set of bits is sent.

[0844] As an example, the fifth piece of information is generated in the RRC sub-layer.

[0845] As an example, the fifth piece of information includes RRC information.

[0846] As one example, the fifth information includes all or part of the IE in an RRC message.

[0847] As an example, the fifth information includes all or part of the fields in an IE of an RRC message.

[0848] As an example, the fifth piece of information is RRC Relase (RRC release).

[0849] As an example, the fifth information is used to instruct the first node to enter the second target RRC state, and the first node is in the second target RRC state when it receives the first information.

[0850] As an example, the second target RRC state is one of the RRC inactive state and the RRC connected state, and the second target RRC state is different from the first target RRC state.

[0851] As an example, the behavior of generating the second bit set and the behavior of generating the fourth bit set, whichever is in the RRC inactive state, includes generating at least one PDCP PDU header, and the corresponding bit set includes the at least one PDCP PDU header, any PDCP PDU header including a PDCP sequence number.

[0852] As an example, the behavior generates the fourth bit set while in the RRC connected state; the behavior generates the second bit set while in the RRC inactive state; the behavior generates the second bit set by generating at least one PDCP PDU header, the corresponding bit set including the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[0853] As an example, the action generates the fourth bit set while the RRC is inactive; the action generates the second bit set while the RRC is inactive; the action generating the fourth bit set includes generating at least one PDCP PDU header, the corresponding bit set including the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number; the action generating the second bit set includes generating at least one PDCP PDU header, the corresponding bit set including the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[0854] As an example, the second target RRC state is the RRC state it was in when receiving the first information.

[0855] As an example, the fourth bit set and the second bit set are transmitted through the same RLC bearer.

[0856] As an example, the logical channel identifier included in the subheader of the MAC PDU that includes at least a portion of the bits in the fourth bit set is the same as the logical channel identifier included in the subheader of the MAC PDU that includes at least a portion of the bits in the second bit set.

[0857] As an example, the first node suspends the RLC bearer for the transmission of the fourth bit set in the second target RRC state; after determining the first target RRC state, the RLC bearer for the transmission of the fourth bit set is activated to send the second bit set.

[0858] As one embodiment, the behavior of suspending the RLC bearer for the transmission of the fourth bit set includes maintaining the context of the RLC bearer for the transmission of the fourth bit set.

[0859] As an example, the fourth bit set and the second bit set are transmitted through the same RLC bearer; the action generates the fourth bit set while the RRC is inactive; the action generates the second bit set while the RRC is connected.

[0860] As an example, the fourth bit set and the second bit set are transmitted through the same RLC bearer; the action generates the fourth bit set while the RRC is inactive; the action generates the second bit set while the RRC is connected; the PDCP entity associated with the RLC bearer of the fourth bit set is on the first node; and the PDCP entity associated with the RLC bearer of the second bit set is on the second node.

[0861] As one embodiment, the fourth bit set and the second bit set are transmitted through the same RLC bearer; the action generates the fourth bit set while in the RRC connected state; the action generates the second bit set while in the RRC inactive state.

[0862] As an example, the fourth bit set and the second bit set are transmitted through the same RLC bearer; the action generates the fourth bit set while in the RRC connected state; the action generates the second bit set while in the RRC inactive state; the PDCP entity associated with the RLC bearer of the fourth bit set is on the second node; and the PDCP entity associated with the RLC bearer of the second bit set is on the first node.

[0863] As an example, the association between the RLC bearer and the PDCP entity includes: the PDCP entity being configured to belong to a radio bearer, the radio bearer being identified by a radio bearer identifier, and the radio bearer identifier also indicating an RLC bearer.

[0864] As an example, for the RRC inactive state and the RRC connected state, the action of generating the second bit set includes generating at least one PDCP PDU header only when the first target RRC state is the RRC inactive state. The second bit set includes the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[0865] As an example, when the first target RRC state is an RRC connection state, the action of generating the second bit set is performed in a layer below the PDCP sublayer.

[0866] As one embodiment, the layer below the PDCP sublayer includes the ADAPT sublayer.

[0867] As an example, the layer below the PDCP sublayer includes an RLC sublayer.

[0868] As an example, the layer below the PDCP sublayer includes a MAC sublayer.

[0869] As an example, the second bit set is transmitted via the L3 relay only when the first target RRC state is the RRC inactive state.

[0870] As an example, when the second bit set is transmitted through the L3 relay, the action of generating the second bit set includes generating at least one PDCP PDU header, the second bit set including the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header including a PDCP sequence number.

[0871] As an example, when the second bit set is transmitted through the L3 relay, the second bit set is processed by the PDCP sublayer.

[0872] As an example, when the second bit set is transmitted through the L3 relay, the second bit set is not processed by the ADAPT sublayer.

[0873] As an example, the PDCP PDU header is generated in the PDCP sublayer.

[0874] As an example, a PDCP PDU header includes a PDCP serial number.

[0875] As an example, the PDCP sequence number comprises 12 bits.

[0876] As an example, the PDCP sequence number comprises 18 bits.

[0877] As an example, the PDCP sequence number is a positive integer not less than 0.

[0878] As one embodiment, a third message is sent via a secondary link; wherein the second message is sent via a cellular link, and the third message is used to instruct the sender of the first message to enter or maintain the first target RRC state.

[0879] As an example, the third information is used to confirm that the sender of the first information has entered the first target RRC state.

[0880] As an example, the third information is generated in the PC5-RRC sublayer.

[0881] As an example, the third information includes PC5-RRC information.

[0882] As an example, the third information belongs to the PC5-S message.

[0883] As one example, the third information includes all or part of the IE in a PC5-RRC message.

[0884] As an example, the third information includes all or part of the fields in an IE of a PC5-RRC message.

[0885] As an example, the third information belongs to the signaling bearer.

[0886] As an example, the third information belongs to the secondary link signaling bearer.

[0887] As one example, the third information includes RRCReconfigurationSidelink.

[0888] As an example, the third information includes RRC ResumeSidelink.

[0889] As an example, if the sender of the first information is in a different RRC state than the first target RRC state when sending the first information, the third information is used to instruct the sender of the first information to enter the first target RRC state.

[0890] As an example, the sender of the first information is in the same RRC state as the first target RRC state when sending the first information, and the third information is used to instruct the sender of the first information to maintain the first target RRC state.

[0891] As an example, the current RRC state is one of the RRC inactive state and the RRC connected state.

[0892] As one embodiment, the second information is used to request the sender of the first information to enter the first target RRC state.

[0893] As one embodiment, the second information is used to request the first node to enter the first target RRC state.

[0894] As one embodiment, the second information is used to request the first node to enter the first target RRC state and to request the sender of the first information to enter the first target RRC state.

[0895] As one embodiment, the third information used to instruct the sender of the first information to enter or maintain the first target RRC state includes: when the sender of the first information is in the RRC inactive state when sending the first information, the third information is used to instruct the sender of the first information to enter the RRC connected state.

[0896] As one embodiment, the third information used to instruct the sender of the first information to enter or maintain the first target RRC state includes: when the sender of the first information is in the RRC inactive state when sending the first information, the third information is used to instruct the sender of the first information to maintain the RRC inactive state.

[0897] As one embodiment, the third information used to instruct the sender of the first information to enter or maintain the first target RRC state includes: when the sender of the first information is in the RRC connected state when sending the first information, the third information is used to instruct the sender of the first information to enter the RRC inactive state.

[0898] As one embodiment, the third information used to instruct the sender of the first information to enter or maintain the first target RRC state includes: when the sender of the first information is in the RRC connection state when sending the first information, the third information is used to instruct the sender of the first information to maintain the RRC connection state.

[0899] As one embodiment, the sender of the first information sends a third set of bits via a secondary link before sending the first information, and receives an eighth information via a secondary link before sending the first information.

[0900] As an example, the eighth message is used to instruct the sender of the first message to enter a third target RRC state, where the sender of the first message was in the third target RRC state when sending the first message, and the third target RRC state is one of the RRC inactive state and the RRC connected state.

[0901] As an example, the third target RRC state is the RRC inactive state, and the action is in the RRC inactive state when sending the first information.

[0902] Example 6A

[0903] Example 6A illustrates another wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 6A As shown. In the appendix Figure 6A In this process, the first node U61A and the second node U62A communicate via the PC5 air interface; the second node U62A and the third node N63A communicate via the Uu air interface; and the first node U61A and the third node N63A communicate via the Uu air interface.

[0904] for First node U61A In step S611A, the second information is received; in step S612A, the second bit group is sent; in step S613A, the third information is received; in step S614A, the first information is received; and in step S615A, the first bit group is sent through the cellular link.

[0905] for Second node U62A In step S621A, the fifth information is received; in step S622A, the second information is sent; in step S623A, the second bit group is received; in step S624A, the fourth bit group is sent; in step S625A, the sixth information is received; in step S626A, the third information is sent; in step S627A, the fourth information is received; and in step S628A, the first information is sent.

[0906] for Third node N63A In step S631A, the fifth information is sent; in step S632A, the fourth bit group is received; in step S633A, the sixth information is sent; in step S634A, the fourth information is sent; and in step S635A, the first bit group is received via the cellular link.

[0907] As an example, the first node transmits the first bit group using the candidate transmission mode transmitted via the cellular link; the third node receives the first bit group via the cellular link.

[0908] As an example, when the first transmission mode is transmission via cellular link, the first bit group is transmitted via the third RLC bearer.

[0909] As an example, the third RLC bearer is identified by the third logical channel identifier.

[0910] As an example, when the first transmission mode is transmission via cellular link, the transmission of the first bit group via the third RLC bearer includes: the first bit group includes the third logical channel identifier.

[0911] As an example, when the first transmission mode is transmission via cellular link, transmitting the first bit group via the third RLC bearer includes: activating the third RLC bearer before transmitting the first bit group via the third RLC bearer.

[0912] As an example, when the first transmission mode is transmission via cellular link, the transmission of the first bit group via the third RLC bearer includes: before the first bit group is transmitted via the third RLC bearer, the RLC entity of the third RLC bearer is established.

[0913] As one embodiment, the third RLC bearer is used for cellular link transmission between the first node and the serving base station of the first node.

[0914] Example 6B

[0915] Example 6B illustrates a second wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 6B As shown. In the appendix Figure 6B In the process, the first node U62B and the second node U61B communicate via the PC5 air interface; the first node U62B and the third node N63B communicate via the Uu air interface.

[0916] for Second node U61B In step S611B, the seventh information is received; in step S612B, the third bit set is sent; in step S613B, the first information is sent; in step S614B, the second information is received; and in step S615B, the first bit set is sent.

[0917] for First node U62BIn step S621B, the sixth information is received; in step S622B, the seventh information is sent; in step S623B, the third bit set is received; in step S624B, the fourth bit set is sent; in step S625B, the fifth information is received; in step S626B, the first information is received; in step S627B, the fourth information is sent; in step S628B, the second information is sent; in step S629B, the first bit set is received; and in step S6210B, the second bit set is sent.

[0918] for Third node N63B In step S631B, the sixth information is sent; in step S632B, the fourth bit set is received; in step S633B, the fifth information is sent; in step S634B, the fourth information is received; and in step S635B, the second bit set is received.

[0919] As one embodiment, a fourth message is sent via the uplink; wherein the second message is sent via the secondary link, and the fourth message is used to instruct the first node to enter or maintain the first target RRC state.

[0920] As one embodiment, a fourth message is sent via the uplink; wherein the second message is sent via the secondary link, and the fourth message is used to instruct the sender of the first message to enter or maintain the first target RRC state.

[0921] As one embodiment, a fourth message is sent via the uplink; wherein the second message is sent via the secondary link, the fourth message is used to instruct the first node to enter or maintain the first target RRC state, and the fourth message is used to instruct the sender of the first message to enter or maintain the first target RRC state.

[0922] As one embodiment, the second information is used to confirm that the sender of the first information has entered the first target RRC state.

[0923] As an example, the fourth information is used to request the first node to enter the first target RRC state.

[0924] As an example, the fourth information is used to request the sender of the first information to enter the first target RRC state.

[0925] As an example, the fourth information is used to request the first node to enter the first target RRC state and to request the sender of the first information to enter the first target RRC state.

[0926] As an example, the fourth information is generated in the RRC sub-layer.

[0927] As an example, the fourth information includes RRC information.

[0928] As one example, the fourth information includes all or part of the IE in an RRC message.

[0929] As an example, the fourth information includes all or part of the fields in an IE of an RRC message.

[0930] As one example, the fourth piece of information includes RRCSetupRequest.

[0931] As one example, the fourth piece of information includes RRCresumeRequest.

[0932] As one example, the fourth piece of information includes RRRCResumeRequest1.

[0933] As an example, the fourth piece of information includes RRCSetupRequest_Relay.

[0934] As one example, the fourth piece of information includes RRCResumeRequest_Relay.

[0935] As an example, the fourth piece of information includes RRCResumeRequest1_Relay.

[0936] As an example, the fourth information belongs to the signaling bearer.

[0937] As an example, the fourth piece of information includes the RRCReconfigurationSidelink message.

[0938] As an example, the RRC state of the first node when receiving the first information is different from the first target RRC state, and the fourth information is used to instruct the first node to enter the first target RRC state.

[0939] As an example, the first node is in the same RRC state as the first target RRC state when it receives the first information, and the fourth information is used to instruct the first node to maintain the first target RRC state.

[0940] As an example, if the sender of the first information is in a different RRC state than the first target RRC state when sending the first information, the fourth information is used to instruct the sender of the first information to enter the first target RRC state.

[0941] As an example, the sender of the first information is in the same RRC state as the first target RRC state when sending the first information, and the fourth information is used to instruct the sender of the first information to maintain the first target RRC state.

[0942] As an example, the current RRC state is one of the RRC inactive state and the RRC connected state.

[0943] As one embodiment, the fourth information used to instruct the first node to enter or maintain the first target RRC state includes: when the first node is in the RRC inactive state when receiving the first information, the fourth information is used to instruct the first node to enter the RRC connected state.

[0944] As one embodiment, the fourth information used to instruct the first node to enter or maintain the first target RRC state includes: when the first node is in the RRC inactive state when receiving the first information, the fourth information is used to instruct the first node to maintain the RRC inactive state.

[0945] As one embodiment, the fourth information used to instruct the first node to enter or maintain the first target RRC state includes: when the first node is in the RRC connection state when receiving the first information, the fourth information is used to instruct the first node to maintain the RRC connection state.

[0946] As one embodiment, the fourth information used to instruct the sender of the first information to enter or maintain the first target RRC state includes: when the sender of the first information is in the RRC inactive state when sending the first information, the fourth information is used to instruct the sender of the first information to enter the RRC connected state.

[0947] As one embodiment, the fourth information used to instruct the sender of the first information to enter or maintain the first target RRC state includes: when the sender of the first information is in the RRC inactive state when sending the first information, the fourth information is used to instruct the sender of the first information to maintain the RRC inactive state.

[0948] As one embodiment, the fourth information used to instruct the sender of the first information to enter or maintain the first target RRC state includes: when the sender of the first information is in the RRC connection state when sending the first information, the fourth information is used to instruct the sender of the first information to maintain the RRC connection state.

[0949] Example 7A

[0950] Example 7A illustrates a schematic diagram of a wireless protocol architecture for relay transmission according to an embodiment of this application, as shown in the attached diagram. Figure 7A As shown.

[0951] Appendix Figure 7A In relay transmission, taking the transmission of data from the first node to the third node via the second node as an example (the same logic applies to the transmission of data from the third node to the first node via the second node): The first target data is processed sequentially by the PDCP sublayer 705A and RLC sublayer 703A at the first node, generating a first target MAC PDU at the MAC sublayer 702A. This PDU is then passed to the PHY layer 701A and transmitted to the PHY layer 711A of the second node via the PC5 air interface. It is then processed sequentially by the MAC sublayer 712A and RLC sublayer 713A to recover the first RLC SDU. The first RLC SDU is processed by the ADAPT sublayer 724A to generate a second RLC SDU. This second RLC SDU is then processed by the RLC sublayer 723A and MAC sublayer 722A to generate a second target MAC PDU, which is then passed to the PHY layer 721A. Finally, it is transmitted to the PHY layer 731A of the third node via the Uu air interface, and then processed by the MAC sublayer 732A to recover the second target MAC PDU. The PDU is then processed by the RLC sublayer 733A to recover the second RLC SDU, and then processed by the ADAPT sublayer 734A and PDCP sublayer 735A to recover the first target data.

[0952] As one embodiment, the transmitting and receiving ends of the first RLC are the first node and the second node, respectively.

[0953] As one embodiment, the transmitting and receiving ends of the second RLC bearer are the second node and the third node, respectively.

[0954] As an example, the phrase being sent via the first RLC bearer includes: being sent via RLC entity 703A of the first node and being received via RLC entity 713A of the second node, or being sent via RLC entity 713A of the second node and being received via RLC entity 703A of the first node; both RLC entity 703A and RLC entity 713A belong to the first RLC bearer.

[0955] As one embodiment, the phrase being sent via the second RLC bearer includes: being sent via the RLC entity 723A of the second node and being received via the RLC entity 733A of the third node, or being sent via the RLC entity 733A of the third node and being received via the RLC entity 723A of the second node; both the RLC entity 723A and the RLC entity 723A belong to the second RLC bearer.

[0956] As an example, the ADAPT sublayer implements the bearer mapping function.

[0957] As an example, the ADAPT sublayer maintains a mapping table from the first RLC bearer to the second RLC bearer.

[0958] As an example, the ADAPT sublayer identifies the first RLC bearer and the second RLC bearer through the first logical channel identifier and the second logical channel identifier.

[0959] As one embodiment, the bearer mapping function includes: sending data received from the first RLC bearer through the second RLC bearer; or sending data received from the second RLC bearer through the first RLC bearer.

[0960] As an example, for the transmission of data belonging to the target bearer from the terminal to the network, the second node maintains the ingress RLC channel included in the first RLC bearer and the egress RLC channel included in the second RLC bearer.

[0961] As an example, the bearer mapping function includes: sending data received from any RLC bearer in the fourth RLC bearer set through the second RLC bearer; or sending data received from the second RLC bearer through one RLC bearer in the fourth RLC bearer set.

[0962] As an example, data received from the first RLC bearer is processed by the ADAPT sublayer and then sent through the second RLC bearer.

[0963] As an example, data received from any RLC bearer in the fourth RLC bearer set is processed by the ADAPT sublayer and then sent through the second RLC bearer.

[0964] As an example, the phrase corresponding to the second RLC bearer and the target bearer includes: the data packet sent through the second RLC bearer includes the target bearer identifier.

[0965] As one embodiment, the first RLC SDU is sent at the first node via the first RLC bearer; the second node receives the first RLC SDU via the first RLC bearer; the first RLC SDU is processed by the ADAPT sublayer to generate the second RLC SDU, the second RLC SDU including the ADAPT subheader; the second RLC SDU is sent via the second RLC bearer.

[0966] As one embodiment, the first bit group includes the first RLC SDU; the third bit group includes the second RLC SDU.

[0967] As one embodiment, the second bit group includes the first RLC SDU; the fourth bit group includes the second RLC SDU.

[0968] As an example, the third RLC SDU is transmitted at the third node via the fifth RLC bearer; the third RLC SDU includes the ADAPT subheader; the second node receives the third RLC SDU via the fifth RLC bearer; the third RLC SDU is processed by the ADAPT sublayer to generate a fourth RLC SDU, the fourth RLC SDU does not include the ADAPT subheader; the fourth RLC SDU is transmitted via the sixth RLC bearer.

[0969] As an example, the third RLC SDU includes the fifth information; the fourth RLC SDU includes the second information.

[0970] As an example, the third RLC SDU includes the first RRC information included in the fifth information; the fourth RLC SDU includes the second information.

[0971] As an example, the third RLC SDU includes the sixth information; the fourth RLC SDU includes the third information.

[0972] As an example, the fifth RLC bearer and the sixth RLC bearer are respectively lower-layer portions of the signaling radio bearer.

[0973] As an example, the fifth RLC bearer and the sixth RLC bearer are respectively lower layer portions of the data radio bearer.

[0974] As an example, the fifth RLC bearer is a lower layer portion of Signaling Radio Bearer 4 (SRB4).

[0975] As an example, the sixth RLC bearer is a lower layer portion of Signaling Radio Bearer 4 (SRB4).

[0976] As an example, the ADAPT sublayer implements routing functionality.

[0977] As an example, the ADAPT sublayer maintains a routing table from the first node to the third node.

[0978] Appendix Figure 7A In this process, the routing function forwards data packets received from the first node to the third node; or forwards data packets received from the third node to the first node.

[0979] Appendix Figure 7A In this system, the third node is the base station, the first node is the user equipment, and the second node is the relay node.

[0980] Appendix Figure 7A In this system, the third node is the base station, the first node is the RSU, and the second node is the relay node.

[0981] Example 7B

[0982] Example 7B illustrates a third wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 7B As shown. In the appendix Figure 7B In the process, the first node U72B and the second node U71B communicate via the PC5 air interface; the first node U72B and the third node N73B communicate via the Uu air interface.

[0983] for Second node U71B In step S711B, the seventh information is received; in step S712B, the third bit set is sent; in step S713B, the first information and the first bit set are sent; and in step S714B, the third information is received.

[0984] for First node U72B In step S721B, the sixth information is received; in step S722B, the seventh information is sent; in step S723B, the third bit set is received; in step S724B, the fourth bit set is sent; in step S725B, the fifth information is received; in step S726B, the first information and the first bit set are received; in step S727B, the second information and the second bit set are sent; and in step S728B, the third information is sent.

[0985] for Third node N73BIn step S731B, the sixth information is sent; in step S732B, the fourth bit set is received; in step S733B, the fifth information is sent; and in step S734B, the second information and the second bit set are received.

[0986] As an example, the reception time of the first information is no later than the reception time of the first bit set.

[0987] As an example, the reception time of the first information is the same as the reception time of the first bit set.

[0988] As an example, the first information and the first bit set are received via different MAC PDUs.

[0989] As an example, the first information and the first bit set are received through the same MAC PDU.

[0990] Appendix Figure 7B In step S713B, the second node sends the first information and the first bit set in the same MAC PDU.

[0991] As an example, the transmission time of the second information is no later than the transmission time of the second bit set.

[0992] As one embodiment, the transmission time of the second information is the same as the transmission time of the second bit set.

[0993] As one embodiment, the second information and the second bit set are transmitted via different MAC PDUs.

[0994] As an example, the second information and the second bit set are sent via the same MAC PDU.

[0995] Appendix Figure 7B In step S727B, the first node sends the second information and the second bit set in the same MAC PDU.

[0996] As one embodiment, the second node sends the first information and the first bit set in the same MAC PDU; the first node sends the second information and the second bit set in the same MAC PDU.

[0997] As one embodiment, the second node sends the first information and the first bit set in the same MAC PDU; the first node sends the second information and the second bit set in different MAC PDUs.

[0998] As one embodiment, the second node sends the first information and the first bit set in different MAC PDUs; the first node sends the second information and the second bit set in the same MAC PDU.

[0999] As one embodiment, the second node sends the first information and the first bit set in different MAC PDUs; the first node sends the second information and the second bit set in different MAC PDUs.

[1000] Example 8A

[1001] Example 8A illustrates a structural block diagram of a processing apparatus in a first node according to an embodiment of this application, as shown in the attached diagram. Figure 8A As shown.

[1002] In the appendix Figure 8A In the first node processing device 800A, a first receiver 801A and a first transmitter 802A are included. The first receiver 801A includes the components specified in the appendix of this application. Figure 4 The transmitter / receiver 454 (including antenna 452), receiver processor 456, multi-antenna receiver processor 458, or controller / processor 459 are at least one of the following: the first transmitter 802A includes the appendix to this application. Figure 4 The transmitter / receiver 454 (including antenna 452), the transmission processor 468, the multi-antenna transmission processor 457, or the controller / processor 459 are at least one of them.

[1003] In embodiment 8A, a first receiver 801A receives first information via a secondary link; determines a first transmission mode based on at least the first information; a first transmitter 802A transmits a first bit group using the first transmission mode, the first bit group including at least one bit; wherein, the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via a cellular link and transmission via a secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; when all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode transmitted via the secondary link.

[1004] As one embodiment, the first condition set includes the first information, which includes the RRC connection status.

[1005] As one embodiment, the first information includes a first threshold; the first condition set includes a first bit set whose data volume is not less than the first threshold, and the first bit set includes the first bit group.

[1006] As an example, when the first transmission mode is transmission via a secondary link, the first bit group is transmitted via a first RLC bearer; when the first transmission mode is transmission via a cellular link, the first bit group is transmitted via a third RLC bearer; wherein, the first RLC bearer and the third RLC bearer correspond to the target bearer respectively; and the first bit group belongs to the target bearer.

[1007] As one embodiment, the first transmitter 802A transmits a second bit group via a secondary link before receiving the first information; the first receiver 801A receives the second information before transmitting the second bit group; and receives third information via the secondary link before receiving the first information and after transmitting the second bit group; wherein the second information is used to configure the first RLC bearer; the third information is used to configure the third RLC bearer; and the third information is used to indicate that the first node enters an RRC inactive state.

[1008] As an example, the third information is sent before the fourth information; the fourth information is used to indicate that the first RLC bearer is suspended.

[1009] As one embodiment, the fourth information is used to indicate that the second RLC bearer is suspended; wherein, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

[1010] Example 8B

[1011] Example 8B illustrates a fourth wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 8B As shown. In the appendix Figure 8B In the process, the first node U82B and the second node U81B communicate via the PC5 air interface; the first node U82B and the third node N83B communicate via the Uu air interface.

[1012] for Second node U81B In step S811B, the seventh information is received; in step S812B, the third bit set is sent; in step S813B, the first information and the first bit set are sent; and in step S814B, the second information is received.

[1013] for First node U82BIn step S821B, the sixth information is received; in step S822B, the seventh information is sent; in step S823B, the third bit set is received; in step S824B, the fourth bit set is sent; in step S825B, the fifth information is received; in step S826B, the first information and the first bit set are received; in step S827B, the fourth information and the second bit set are sent; and in step S828B, the second information is sent.

[1014] for Third node N83B In step S831B, the sixth information is sent; in step S832B, the fourth bit set is received; in step S833B, the fifth information is sent; and in step S834B, the fourth information and the second bit set are received.

[1015] As an example, the transmission time of the fourth information is no later than the transmission time of the second bit set.

[1016] As an example, the transmission time of the fourth information is the same as the transmission time of the second bit set.

[1017] As an example, the fourth information and the second bit set are sent via different MAC PDUs.

[1018] As an example, the fourth information and the second bit set are sent via the same MAC PDU.

[1019] Appendix Figure 8B In step S827B, the first node sends the fourth information and the second bit set in the same MAC PDU.

[1020] As one embodiment, the second node sends the first information and the first bit set in the same MAC PDU; the first node sends the fourth information and the second bit set in the same MAC PDU.

[1021] As one embodiment, the second node sends the first information and the first bit set in the same MAC PDU; the first node sends the fourth information and the second bit set in different MAC PDUs.

[1022] As one embodiment, the second node sends the first information and the first bit set in different MAC PDUs; the first node sends the fourth information and the second bit set in the same MAC PDU.

[1023] As one embodiment, the second node sends the first information and the first bit set in different MAC PDUs; the first node sends the fourth information and the second bit set in different MAC PDUs.

[1024] Example 9A

[1025] Example 9A illustrates a structural block diagram of a processing apparatus in a second node according to an embodiment of this application, as shown in the attached diagram. Figure 9A As shown.

[1026] In the appendix Figure 9A In the second node processing device 900A, there are a second receiver 901A and a second transmitter 902A. The second receiver 901A includes the components specified in the appendix to this application. Figure 4 The transmitter / receiver 418 (including antenna 420), receiver processor 470, multi-antenna receiver processor 472, or controller / processor 475 are at least one of the following: the second transmitter 902A includes the appendix to this application. Figure 4 The transmitter / receiver 418 (including antenna 420), the transmission processor 416, the multi-antenna transmission processor 471, or the controller / processor 475 are at least one of them.

[1027] In one embodiment, a second transmitter 902A transmits first information via a secondary link and transmits a third bit group via a cellular link; a second receiver 901A receives the first bit group via the secondary link, the first bit group including at least one bit; wherein, at least the first information is used to determine a first transmission mode; the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via a cellular link and transmission via a secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; when all conditions in the first set of conditions are met, the set of candidate transmission modes includes the candidate transmission mode transmitted via the secondary link; the third bit group includes the first bit group.

[1028] As one embodiment, the first condition set includes the first information, which includes the RRC connection status.

[1029] As one embodiment, the first information includes a first threshold; the first condition set includes a first bit set whose data volume is not less than the first threshold, and the first bit set includes the first bit group.

[1030] As one embodiment, the first bit group is received via a first RLC bearer; wherein the first RLC bearer corresponds to the target bearer; and the first bit group belongs to the target bearer.

[1031] As one embodiment, the second receiver 901A receives a second bit group via a secondary link before sending the first information; and receives fifth and sixth information via a cellular link; the second transmitter 902A sends the second information before receiving the second bit group; sends the third information via the secondary link before sending the first information and after receiving the second bit group; and sends the fourth bit group via the cellular link after receiving the fifth information and before receiving the sixth information; wherein the fifth information is used to generate the second information; the fifth information is used to configure the first RLC bearer and the second RLC bearer; the sixth information is used to generate the third information; the third information is used to configure the third RLC bearer; the third information is used to instruct the receiver of the first information to enter an RRC inactive state; and the fourth bit group includes the second bit group.

[1032] As one embodiment, the second receiver 901A receives fourth information via a cellular link; wherein the sixth information is received before the fourth information; the fourth information is used to indicate that the first RLC bearer is suspended.

[1033] As one embodiment, the fourth information is used to indicate that the second RLC bearer is suspended; wherein, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

[1034] Example 9B

[1035] Example 9B illustrates another transmission flowchart of a first node according to an embodiment of this application, as shown in the appendix. Figure 9B As shown.

[1036] In embodiment 9B, the first node 900B receives sixth information via a cellular link in step 901B; sends seventh information via a secondary link in step 902B; receives first information via a secondary link in step 903B; receives a first bit set via the secondary link; sends second information in step 904B; generates a second bit set; and sends the second bit set via a cellular link, the second bit set including the first bit set; wherein the sixth information is used to generate the seventh information; the seventh information is used to generate the first information; and the second information is used to indicate a first target RRC state, the first target RRC state being one of an inactive RRC state and an connected RRC state.

[1037] As an example, the sixth information is used to generate the seventh information.

[1038] As an example, the first node determines the relay mode supported by the first node based on the sixth information.

[1039] As an example, the relay mode supported by the first node is used to generate the seventh information.

[1040] As an example, the first node determines the relay mode supported by the first node based on the sixth information and the first node's UE capability.

[1041] As an example, the first node determines, based on the sixth information, that the relay mode supported by the first node is implemented by a terminal device.

[1042] As an example, the relay mode included in the seventh information is a subset of the relay modes included in the sixth information.

[1043] As an example, the relay mode included in the seventh information is the same as the relay mode included in the sixth information.

[1044] As an example, the relay mode included in the sixth information is no less than the relay mode included in the seventh information.

[1045] As one embodiment, the relay mode included in the sixth information includes the L2 relay and the L3 relay, and the relay mode included in the seventh information includes at least one of the L2 relay or the L3 relay.

[1046] As one embodiment, the relay mode included in the sixth information includes the L2 relay; the relay mode included in the seventh information includes the L2 relay.

[1047] As one embodiment, the relay mode included in the sixth information includes the L3 relay; the relay mode included in the seventh information includes the L3 relay.

[1048] As one embodiment, the sixth information includes at least one of the L2 relay or the L3 relay; the seventh information includes a relay mode that does not support relay modes.

[1049] As an example, the seventh information is used to generate the first information.

[1050] As an example, the sender of the first information determines the relay mode based on the seventh information; the relay mode is used to generate the first information.

[1051] As an example, the sender of the first information determines the relay mode based on the seventh information by: when the seventh information includes the L2 relay, determining the relay mode as L2 relay.

[1052] As an example, the sender of the first information determines the relay mode based on the seventh information by: when the seventh information includes the L3 relay, determining the relay mode as L3 relay.

[1053] As an example, the sender of the first information determines the relay mode based on the seventh information as follows: when the seventh information includes the L2 relay and the L3 relay, the sender of the first information randomly selects and determines the relay mode as L2 relay or L3 relay with equal probability.

[1054] As an example, the sender of the first information determining the relay mode based on the seventh information includes: when the seventh information includes the L2 relay and the L3 relay, the sender of the first information determines the relay mode based on the RRC status of the first node.

[1055] As an example, the sender of the first information determines the relay mode based on the seventh information as follows: when the seventh information includes the L2 relay and the L3 relay, and when the RRC status of the first node is the RRC connection status, the sender of the first information determines the relay mode to be L2 relay.

[1056] As an example, the sender of the first information determines the relay mode based on the seventh information as follows: when the seventh information includes the L2 relay and the L3 relay, and when the RRC status of the first node is an inactive RRC status, the sender of the first information determines the relay mode to be L3 relay.

[1057] As an example, the sender of the first information determines and generates the first information based on the seventh information and the RRC status at the time of sending the first information.

[1058] As an example, when the RRC state is inactive when the first information is sent, and the seventh information indicates the L2 relay, the first information is determined to include the PC5 signaling.

[1059] As an example, when the RRC state is in an inactive state when the first information is sent, and the seventh information indicates the L2 relay, the first information is determined to include the Uu signaling.

[1060] As an example, when the RRC state is inactive when the first information is sent, and the seventh information indicates the L3 relay, the first information is determined to include the Uu signaling.

[1061] As an example, when the RRC state is in an inactive state when the first information is sent, and the seventh information indicates the L3 relay, the first information is determined to include the PC5 signaling.

[1062] Example 10A

[1063] Example 10A illustrates a structural block diagram of a processing apparatus in a third node according to an embodiment of this application, as shown in the attached diagram. Figure 10A As shown.

[1064] In embodiment 10A, a third transmitter 1002A transmits sixth information via a cellular link; a third receiver 1001A receives a first bit group via a cellular link, the first bit group including at least one bit; wherein, the sixth information is used to generate third information; the third information is used to configure a third RLC bearer; the third information is used to indicate entering an RRC inactive state; the first bit group is received via the third RLC bearer; the third RLC bearer corresponds to a target bearer; the first bit group belongs to the target bearer.

[1065] As an example, the third transmitter 1002A transmits fourth information via a cellular link; wherein the sixth information is transmitted before the fourth information; the fourth information is used to indicate that the first RLC bearer is suspended; the first RLC bearer corresponds to the target bearer.

[1066] As one embodiment, the fourth information is used to indicate that the second RLC bearer is suspended; wherein, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

[1067] As an example, the third transmitter 1002A transmits the fifth information via a cellular link before transmitting the sixth information; the third receiver 1001A receives the fourth bit group after transmitting the fifth information and before transmitting the sixth information; wherein the fifth information is used to configure the first RLC bearer and the second RLC bearer.

[1068] Example 10B

[1069] Example 10B illustrates a schematic diagram of a wireless protocol architecture for relay transmission according to an embodiment of this application, as shown in the attached diagram. Figure 10B As shown.

[1070] Appendix Figure 10B In scenario A, during relay transmission, taking data transmission from the second node through the first node to the third node as an example (the same logic applies to data transmission from the third node through the first node to the second node): The first target data is processed sequentially by the PDCP sublayer 1005B and RLC sublayer 1003B at the second node, generating a first target MAC PDU at the MAC sublayer 1002B. This MAC PDU is then passed to the PHY layer 1001B and transmitted to the PHY layer 1011B of the first node via the PC5 air interface. It is then processed sequentially by the MAC sublayer 1012B and RLC sublayer 1013B to recover the first RLC data. The first RLC data is processed by the ADAPT sublayer 1024B and then regenerated as second RLC data at the RLC sublayer 1023B. After processing by the MAC sublayer 1022B, a second target MAC PDU is generated and transmitted to the PHY layer 1021B. This data is then transmitted to the PHY layer 1031B of the third node via the Uu air interface and recovered as the second target MAC PDU at the MAC sublayer 1032B. The PDU is then processed sequentially through RLC sublayer 1033B, ADAPT sublayer 1034B, and PDCP sublayer 1035B to recover the first target data.

[1071] Appendix Figure 10B Case A is the wireless protocol architecture of the L2 relay; the first node is a relay node; the data forwarded by the relay node is processed through the MAC sublayer, RLC sublayer and ADAPT sublayer but not through the PDCP sublayer.

[1072] Appendix Figure 10BIn scenario B, during relay transmission, taking data transmission from the second node to the third node via the first node as an example: the first target data at the second node is processed sequentially through the PDU layer 1058B, SDAP sublayer 1056B, PDCP sublayer 1055B, and RLC sublayer 1053B to generate the first target MAC PDU at the MAC sublayer 1052B. This MAC PDU is then passed to the PHY layer 1051B and transmitted to the PHY layer 1061B of the first node via the PC5 air interface. It is then processed sequentially through the MAC sublayer 1062B, RLC sublayer 1063B, PDCP sublayer 1065B, and SDAP sublayer 1066B to recover the first SDAP data. After processing by the PDU relay layer 1068B, the first SDAP data is further processed sequentially through the SDAP sublayer 1076B, PDCP sublayer 1075B, RLC sublayer 1073B, and MAC sublayer 1072B to generate the second target MAC PDU. The PDU is then passed to the PHY layer 1071B; then transmitted to the PHY layer 1081B of the third node via the Uu air interface, and then the second target MACPDU is recovered through the MAC sublayer 1082B. After being processed by the RLC sublayer 1083B, PDCP sublayer 1085B, SDAP sublayer 1086B and Relay layer, it is sent to the backend core network; the first target data is recovered in the PDU layer of the core network.

[1073] Appendix Figure 10B Case B is the wireless protocol architecture of the L3 relay; the first node is a relay node; the data forwarded by the relay node is processed through the MAC sublayer, RLC sublayer and PDCP sublayer.

[1074] As an example, the MAC sublayer, RLC sublayer, and ADAPT sublayer are below the PDCP sublayer.

[1075] As an example, the ADAPT sublayer implements the bearer mapping function.

[1076] As an example, the ADAPT sublayer implements routing functionality.

[1077] As an example, the PDUrelay layer implements routing functionality.

[1078] As an example, the PDUrelay layer implements the bearer mapping function.

[1079] As an example, the relay layer implements routing functionality.

[1080] Appendix Figure 10BIn this process, the routing function forwards data packets received from the second node to the third node.

[1081] Appendix Figure 10B In this system, the third node is the base station, the second node is the user equipment, and the first node is the relay node.

[1082] Appendix Figure 10B In this system, the third node is the base station, the second node is the RSU, and the first node is the relay node.

[1083] Example 11

[1084] Example 11 illustrates a structural block diagram of a processing apparatus in a first node according to an embodiment of this application, as shown in the attached diagram. Figure 11 As shown.

[1085] In the appendix Figure 11 In the first node processing device 1100a, a first receiver 1101a and a first transmitter 1102a are included. The first receiver 1101a includes the components specified in the appendix of this application. Figure 4 The transmitter / receiver 454 (including antenna 452), receiver processor 456, multi-antenna receiver processor 458, or controller / processor 459 are at least one of the following: the first transmitter 1102a includes the appendix to this application. Figure 4 The transmitter / receiver 454 (including antenna 452), the transmission processor 468, the multi-antenna transmission processor 457, or the controller / processor 459 are at least one of them.

[1086] In embodiment 11, a first receiver 1101a receives first information via a secondary link and determines a first target RRC state based on at least the first information; it also receives a first bit set via the secondary link; a first transmitter 1102a transmits second information; it generates a second bit set and transmits the second bit set via a cellular link, the second bit set including the first bit set; wherein the first target RRC state is one of an inactive RRC state and an active RRC state; the second information is used to indicate the first target RRC state.

[1087] As an example, for the RRC inactive state and the RRC connected state, the action of generating the second bit set includes generating at least one PDCP PDU header only when the first target RRC state is the RRC inactive state. The second bit set includes the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[1088] As one embodiment, the first transmitter 1102a transmits third information via a secondary link; wherein the second information is transmitted via a cellular link, and the third information is used to instruct the sender of the first information to enter or maintain the first target RRC state.

[1089] As one embodiment, the first transmitter 1102a transmits fourth information via a cellular link; wherein the second information is transmitted via a secondary link, and the fourth information is used to instruct the first node to enter or maintain the first target RRC state.

[1090] As one embodiment, the first receiver 1101a receives a third bit set via a secondary link before receiving the first information, and receives a fifth information via a cellular link before receiving the first information and after the fourth bit set is transmitted; the first transmitter 1102a generates and transmits the fourth bit set via a cellular link before receiving the first information, the fourth bit set including the third bit set; wherein, the fifth information is used to indicate that the first node enters a second target RRC state, the first node is in the second target RRC state when receiving the first information, the second target RRC state is one of the RRC inactive state and the RRC connected state, and the second target RRC state is different from the first target RRC state; the action of generating the second bit set and the action of generating the fourth bit set, which are both in the RRC inactive state, includes generating at least one PDCP PDU header, the corresponding bit set including the at least one PDCP PDU header, any PDCP PDU header including a PDCP sequence number; the fourth bit set and the second bit set are transmitted via the same RLC bearer.

[1091] As an example, the first receiver 1101a receives sixth information via a cellular link; wherein the sixth information and the first information are used to determine the first target RRC status.

[1092] As an example, the first transmitter 1102a transmits seventh information via a secondary link; wherein the seventh information is used to generate the first information.

[1093] In the appendix Figure 11 In the first node processing device 1100b, there are a first receiver 1101b and a first transmitter 1102b. The first receiver 1101b includes the components specified in the appendix of this application. Figure 4The transmitter / receiver 454 (including antenna 452), receiver processor 456, multi-antenna receiver processor 458, or controller / processor 459 are at least one of the following: the first transmitter 1102b includes the appendix to this application. Figure 4 The transmitter / receiver 454 (including antenna 452), the transmission processor 468, the multi-antenna transmission processor 457, or the controller / processor 459 are at least one of them.

[1094] In embodiment 11, the first receiver 1101b receives first information via a secondary link; receives sixth information via a cellular link; and receives a first bit set via the secondary link. The first transmitter 1102b transmits seventh information via the secondary link; transmits second information; generates a second bit set; and transmits the second bit set via the cellular link, the second bit set including the first bit set. The sixth information is used to generate the seventh information; the seventh information is used to generate the first information; and the second information is used to indicate the first target RRC state, which is either an inactive RRC state or a connected RRC state.

[1095] As an example, the sixth information and the first information are used to determine the first target RRC status.

[1096] As one embodiment, the sixth information indicates an available relay mode; the seventh information indicates a supported relay mode; wherein the available relay mode indicated by the sixth information includes the supported relay mode indicated by the seventh information.

[1097] Example 12

[1098] Example 12 illustrates a structural block diagram of a processing apparatus in a second node according to an embodiment of this application, as shown in the attached diagram. Figure 12 As shown.

[1099] In the appendix Figure 12 In the second node processing device 1200a, there are a second receiver 1201a and a second transmitter 1202a. The second receiver 1201a includes the components specified in the appendix of this application. Figure 4 The transmitter / receiver 418 (including antenna 420), receiver processor 470, multi-antenna receiver processor 472, or controller / processor 475 are at least one of the following: the second transmitter 1202a includes the appendix to this application. Figure 4 The transmitter / receiver 418 (including antenna 420), the transmission processor 416, the multi-antenna transmission processor 471, or the controller / processor 475 are at least one of them.

[1100] In embodiment 12, the second transmitter 1202a transmits first information via a secondary link, at least the first information being used to determine a first target RRC state; transmits a first bit set via the secondary link; wherein, second information is transmitted; a second bit set is generated, the second bit set is transmitted via a cellular link, and the second bit set includes the first bit set; the first target RRC state is one of an RRC inactive state and an RRC connected state; the second information is used to indicate the first target RRC state.

[1101] As an example, for the RRC inactive state and the RRC connected state, the second bit set is generated only when the first target RRC state is the RRC inactive state. This includes the generation of at least one PDCP PDU header. The second bit set includes the at least one PDCP PDU header, and any PDCP PDU header in the at least one PDCP PDU header includes a PDCP sequence number.

[1102] As one embodiment, the second receiver 1201a receives third information via a secondary link; wherein the second information is transmitted via a cellular link, and the third information is used to instruct the second node to enter or maintain the first target RRC state.

[1103] As one embodiment, the second receiver 1201a receives the second information via a secondary link; wherein, the fourth information is transmitted via a cellular link; wherein, the fourth information is used to instruct the receiver of the first information to enter or maintain the first target RRC state.

[1104] As one embodiment, the second transmitter 1202a transmits a third bit set via a secondary link before transmitting the first information, and receives a fifth information via a cellular link before transmitting the first information and after the fourth bit set is transmitted; wherein, the fourth bit set is generated and transmitted via the cellular link before transmitting the first information, and the fourth bit set includes the third bit set; the fifth information is used to indicate that the receiver of the first information enters a second target RRC state, the receiver of the first information is in the second target RRC state when receiving the first information, the second target RRC state is one of the RRC inactive state and the RRC connected state, and the second target RRC state is different from the first target RRC state; the generation of the second bit set and the generation of the fourth bit set, which are both in the RRC inactive state, include the generation of at least one PDCP PDU header, the corresponding bit set includes the at least one PDCP PDU header, any PDCP PDU header includes a PDCP sequence number; the fourth bit set and the second bit set are transmitted via the same RLC bearer.

[1105] As an example, the sixth information is received via a cellular link; wherein the sixth information and the first information are used to determine the first target RRC status.

[1106] As one embodiment, the second receiver 1201a receives seventh information via a secondary link; wherein the seventh information is used to generate the first information.

[1107] In the appendix Figure 12 In the second node processing device 1200b, there are a second receiver 1201b and a second transmitter 1202b. The second receiver 1201b includes the components specified in the appendix to this application. Figure 4 The transmitter / receiver 418 (including antenna 420), receiver processor 470, multi-antenna receiver processor 472, or controller / processor 475 are at least one of the following: the second transmitter 1202b includes the appendix to this application. Figure 4 The transmitter / receiver 418 (including antenna 420), the transmission processor 416, the multi-antenna transmission processor 471, or the controller / processor 475 are at least one of them.

[1108] In embodiment 12, the second transmitter 1202b transmits first information via a secondary link; transmits a first bit set via the secondary link; the second receiver 1201b receives seventh information via the secondary link; wherein, the sixth information is received via a cellular link; the sixth information is used to generate the seventh information; the seventh information is used to generate the first information; second information is transmitted; a second bit set is generated, and the second bit set is transmitted via the cellular link, the second bit set including the first bit set; the second information is used to indicate a first target RRC state, the first target RRC state being one of an RRC inactive state and an RRC connected state.

[1109] As an example, the sixth information and the first information are used to determine the first target RRC status.

[1110] As one embodiment, the sixth information indicates an available relay mode; the seventh information indicates a supported relay mode; wherein the available relay mode indicated by the sixth information includes the supported relay mode indicated by the seventh information.

[1111] Those skilled in the art will understand that all or part of the steps in the above methods can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory, hard disk, or optical disk. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiments can be implemented in hardware or in the form of software functional modules. This application is not limited to any specific combination of software and hardware. The first type of communication node or UE or terminal in this application includes, but is not limited to, mobile phones, tablets, laptops, network cards, low-power devices, eMTC (enhanced Machine Type Communication) devices, NB-IoT devices, vehicle-mounted communication devices, aircraft, airplanes, drones, remote-controlled airplanes, and other wireless communication devices. The second type of communication node or base station or network-side equipment in this application includes, but is not limited to, macrocell base stations, microcell base stations, home base stations, relay base stations, eNBs, gNBs, transmission and reception points (TRPs), relay satellites, satellite base stations, airborne base stations, and other wireless communication devices.

[1112] The above description is merely a preferred embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A first node configured for wireless communication, the first node comprising: include: The first receiver receives the first information via the secondary link; A first transmission mode is determined based on at least the first information; A first transmitter transmits a first bit group using the first transmission mode, the first bit group including at least one bit; Wherein, the first transmission mode is one of the candidate transmission mode set, the candidate transmission mode set includes transmission via cellular link and transmission via secondary link; the first information is used to indicate a first condition set, the first condition set includes at least one condition; the first information includes a first threshold; the first condition set also includes a first bit set whose data volume is not less than the first threshold, the first bit set includes the first bit group; When all conditions in the first set of conditions are met, the first sending mode is determined to be sending via the secondary link.

2. The first node of claim 1, wherein, The first set of conditions includes the first information, which includes the RRC connection status.

3. The first node of any of claims 1-2, wherein, When the first transmission mode is transmission via secondary link, the first bit group is transmitted via first RLC; when the first transmission mode is transmission via cellular link, the first bit group is transmitted via third RLC. The first RLC bearer and the third RLC bearer correspond to the target bearer, respectively; the first bit group belongs to the target bearer.

4. The first node according to claim 3, characterized in that, include: The first transmitter sends a second bit group via a secondary link before receiving the first information; The first receiver receives the second information before sending the second bit group; The third information is received via a secondary link before the first information is received and after the second bit group is sent. Wherein, the second information is used to configure the first RLC bearer; the third information is used to configure the third RLC bearer; and the third information is used to indicate that the first node enters an RRC inactive state.

5. The first node according to claim 4, characterized in that, The third message is sent before the fourth message; the fourth message is used to indicate that the first RLC bearer is suspended.

6. The first node according to claim 5, characterized in that, The fourth piece of information is used to indicate that the second RLC bearer is suspended; Specifically, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

7. A second node used for wireless communication, characterized in that, include: The second transmitter sends the first information via the secondary link; The third bit group is transmitted via the cellular link; The second receiver receives the first bit group via a secondary link, the first bit group including at least one bit; Wherein, at least the first information is used to determine a first transmission mode; the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes includes transmission via a cellular link and transmission via a secondary link; the first information is used to indicate a first set of conditions, the first set of conditions includes at least one condition; the first information includes a first threshold; the first set of conditions includes a first set of bits whose data amount is not less than a first threshold, the first set of bits includes the first bit group; When all conditions in the first set of conditions are met, the first sending mode is determined to be sending via the secondary link; The third bit group includes the first bit group.

8. The second node according to claim 7, characterized in that, The first set of conditions includes the first information, which includes the RRC connection status.

9. The second node according to claim 8, characterized in that, The first bit group is received via a first RLC bearer; wherein the first RLC bearer corresponds to the target bearer; and the first bit group belongs to the target bearer.

10. The second node according to claim 9, characterized in that, The second receiver receives the second bit group via a secondary link before sending the first information; it also receives the fifth and sixth information via a cellular link. The second transmitter transmits a second message before receiving the second bit group; transmits a third message via a secondary link before transmitting the first message and after receiving the second bit group; and transmits a fourth bit group via a cellular link after receiving the fifth message and before receiving the sixth message. The fifth information is used to generate the second information; the fifth information is used to configure the first RLC bearer and the second RLC bearer; the sixth information is used to generate the third information; the third information is used to configure the third RLC bearer; the third information is used to instruct the receiver of the first information to enter an RRC inactive state; the fourth bit group includes the second bit group.

11. The second node according to claim 10, characterized in that, The second receiver receives fourth information via a cellular link; wherein the sixth information is received prior to the fourth information; the fourth information is used to indicate that the first RLC bearer is suspended.

12. The second node according to claim 11, characterized in that, The fourth information is used to indicate that the second RLC bearer is suspended; wherein, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

13. A third node used for wireless communication, characterized in that, include: The third transmitter sends the sixth message via a cellular link; A third receiver receives a first bit group via a cellular link, the first bit group including at least one bit; The sixth information is used to generate the third information; the third information is used to configure the third RLC bearer; the third information is used to indicate entering the RRC inactive state; the first bit group is received through the third RLC bearer; The third RLC bearer corresponds to the target bearer; the first bit group belongs to the target bearer; Wherein, the first bit group belonging to the target bearer includes: the first bit group being sent through the target bearer.

14. The third node according to claim 13, characterized in that, The third transmitter transmits fourth information via a cellular link; wherein the sixth information is transmitted before the fourth information; the fourth information is used to indicate that the first RLC bearer is suspended; the first RLC bearer corresponds to the target bearer.

15. The third node according to claim 14, characterized in that, The fourth information is used to indicate that the second RLC bearer is suspended; wherein, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

16. The third node according to claim 15, characterized in that, include: The third transmitter transmits the fifth information via a cellular link before transmitting the sixth information; The third receiver receives the fourth bit group after sending the fifth information and before sending the sixth information; The fifth piece of information is used to configure the first RLC bearer and the second RLC bearer.

17. A method used in a first node of wireless communication, characterized in that, include: The first information is received via the secondary link; A first transmission mode is determined based on at least the first information; The first bit group is transmitted using the first transmission mode, and the first bit group includes at least one bit. Wherein, the first transmission mode is one of the candidate transmission mode set, the candidate transmission mode set includes transmission via cellular link and transmission via secondary link; the first information is used to indicate a first condition set, the first condition set includes at least one condition; the first information includes a first threshold; the first condition set includes a first bit set whose data volume is not less than the first threshold, the first bit set includes the first bit group; When all conditions in the first set of conditions are met, the first sending mode is determined to be sending via the secondary link.

18. The method in the first node according to claim 17, characterized in that, include: The first set of conditions includes the first information, which includes the RRC connection status.

19. The method in the first node according to claim 17, characterized in that, include: When the first transmission mode is transmission via secondary link, the first bit group is transmitted via first RLC; when the first transmission mode is transmission via cellular link, the first bit group is transmitted via third RLC. The first RLC bearer and the third RLC bearer correspond to the target bearer, respectively; the first bit group belongs to the target bearer.

20. The method in the first node according to claim 19, characterized in that, include: The second bit group is sent via the secondary link before the first information is received; Receive the second information before sending the second bit group; The third information is received via a secondary link before the first information is received and after the second bit group is sent; Wherein, the second information is used to configure the first RLC bearer; the third information is used to configure the third RLC bearer; and the third information is used to indicate that the first node enters an RRC inactive state.

21. The method in the first node according to claim 20, characterized in that, include: The third message is sent before the fourth message; The fourth piece of information is used to indicate that the first RLC bearer is suspended.

22. The method in the first node according to claim 21, characterized in that, include: The fourth piece of information is used to indicate that the second RLC bearer is suspended; Specifically, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

23. A method used in a second node for wireless communication, characterized in that, include: The first message is sent via the secondary link; The third bit group is transmitted via the cellular link; The first bit group is received via the secondary link, and the first bit group includes at least one bit. Wherein, at least the first information is used to determine a first transmission mode; the first transmission mode is one of a set of candidate transmission modes, the set of candidate transmission modes including transmission via cellular link and transmission via secondary link; the first information is used to indicate a first set of conditions, the first set of conditions including at least one condition; the first information includes a first threshold; the first set of conditions includes a first set of bits whose data amount is not less than the first threshold, the first set of bits including the first bit group; When all conditions in the first set of conditions are met, the first sending mode is determined to be sending via the secondary link; The third bit group includes the first bit group.

24. The method in the second node according to claim 23, characterized in that, include: The first set of conditions includes the first information, which includes the RRC connection status.

25. The method in the second node according to claim 23, characterized in that, include: The first bit group is received via a first RLC bearer; wherein the first RLC bearer corresponds to the target bearer; The first bit group belongs to the target bearer.

26. The method in the second node according to claim 25, characterized in that, include: The second bit group is received via a secondary link before the first information is sent. The fifth and sixth messages are received via cellular link; Send a second message before receiving the second bit group; send a third message via a secondary link before sending the first message and after receiving the second bit group; send a fourth bit group via a cellular link after receiving the fifth message and before receiving the sixth message; The fifth information is used to generate the second information; the fifth information is used to configure the first RLC bearer and the second RLC bearer; the sixth information is used to generate the third information; the third information is used to configure the third RLC bearer; the third information is used to instruct the receiver of the first information to enter an RRC inactive state; the fourth bit group includes the second bit group.

27. The method in the second node according to claim 26, characterized in that, include: Receive the fourth information via cellular link; The sixth information is received before the fourth information; the fourth information is used to indicate that the first RLC bearer is suspended.

28. The method in the second node according to claim 27, characterized in that, include: The fourth piece of information is used to indicate that the second RLC bearer is suspended; Specifically, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

29. A method used in a third node for wireless communication, characterized in that, include: The sixth message is sent via cellular link; A first bit group is received via a cellular link, the first bit group comprising at least one bit; The sixth information is used to generate the third information; the third information is used to configure the third RLC bearer; the third information is used to indicate entering the RRC inactive state; the first bit group is received through the third RLC bearer; The third RLC bearer corresponds to the target bearer; the first bit group belongs to the target bearer; Wherein, the first bit group belonging to the target bearer includes: the first bit group being sent through the target bearer.

30. The method in the third node according to claim 29, characterized in that, include: Send the fourth message via cellular link; The sixth message is sent before the fourth message; The fourth piece of information is used to indicate that the first RLC bearer is suspended; the first RLC bearer corresponds to the target bearer.

31. The method in the third node according to claim 30, characterized in that, include: The fourth information is used to indicate that the second RLC bearer is suspended; wherein, the fourth RLC bearer set is mapped to the second RLC bearer; the fourth RLC bearer set includes the first RLC bearer; all RLC bearers in the fourth RLC bearer set are suspended; the second RLC bearer corresponds to the target bearer.

32. The method in the third node according to claim 31, characterized in that, include: The fifth information is sent via the cellular link before the sixth information is sent. The fourth bit group is received after the fifth message and before the sixth message is sent; The fifth piece of information is used to configure the first RLC bearer and the second RLC bearer.

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