CN116743329A

CN116743329A - Method and apparatus for use in wireless communication

Info

Publication number: CN116743329A
Application number: CN202210198724.6A
Authority: CN
Inventors: 张锦芳; 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2023-09-12
Also published as: WO2023165345A1

Abstract

A method and apparatus for use in wireless communications is disclosed. A first node receives a first message indicating a first set of radio bearers and a second set of radio bearers; transmitting a second message, the second message comprising RRC signaling; starting a first timer with the second message; determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer; wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state. The application can effectively support the data transmission in the RRC inactive state.

Description

Method and apparatus for use in wireless communication

Technical Field

The present application relates to a method and apparatus used in a wireless communication system, and more particularly, to a method and apparatus for supporting transmission of data in an RRC inactive state in wireless communication.

Background

The RRC INACTIVE (rrc_inactive) state is a newly introduced RRC (Radio resource control ) state in NR (New Radio, new air interface). When the user enters the RRC inactive state, the user may retain a portion of the network configuration information. When the service arrives, the user can perform data transmission by re-entering an RRC connection (rrc_connected) state. Until Rel (release) -16, data transmission in RRC inactive state is not supported in 3GPP (3 rd Generation Partner Project, third generation partnership project) RAN (Radio Access Network ).

The application scene of the future wireless communication system is more and more diversified, and along with the rapid development of the internet of things, the small data service is an important service in the future wireless communication. For small data transmission, the signaling overhead of RRC state transition is greater than the transmission overhead of small data, and the power consumption overhead of the UE is increased. Therefore, the decision to initiate WI (workitem, workgroup) standardization work for small data transmissions (small data transmission, SDT) in RRC inactive state is made at 3gpp ran#88e.

Multicast/broadcast (multicast/broadcast) transmission characteristics are used in many important application scenarios, such as public safety (public security) and emergency tasks (transmission security), V2X (Vehicle-to-emergency) applications, software delivery (software delivery) and group communication (group communications), etc., and the one-to-many transmission characteristics of multicast/broadcast communication can significantly improve system performance and user experience. In order to support multicast/broadcast communication, in Rel-17, 3GPP has studied for MBS (multicast/broadcast service) transmission in which a UE (User Equipment) is in an RRC CONNECTED state. To further save UE power consumption, 3GPP starts to discuss MBS transmission when UE is in RRC inactive state in Rel-18.

Disclosure of Invention

The inventors found through research that when only small data transmission is supported in an RRC inactive state, if it is monitored that the small data transmission procedure fails, the UE autonomously enters an RRC IDLE (rrc_idle) state. When supporting both small data transmission and MBS transmission in an RRC inactive state, if the small data transmission process is monitored to fail, entering an RRC idle state, and interrupting MBS reception; otherwise, if the MBS process is monitored to fail or enter the RRC idle state after stopping, the small data transmission is interrupted. Therefore, it is necessary to consider the small data transmission procedure and the MBS reception procedure in the RRC inactive state in combination.

The application discloses a solution, which combines the state of a small data transmission process and an MBS receiving process in an RRC inactive state to determine whether to switch the RRC state, thereby achieving the beneficial effect of effectively supporting the data transmission in the RRC inactive state. Although the application was initially directed to the Uu air interface, the application can also be used for the PC5 air interface. Furthermore, the adoption of a unified solution for different scenarios, including but not limited to upstream communication scenarios, also helps to reduce hardware complexity and cost. Embodiments in the first node of the application and features in the embodiments may be applied to any other node and vice versa without conflict. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict. In particular, the term (Terminology), noun, function, variable in the present application may be interpreted (if not specifically stated) with reference to the definitions in the 3GPP specification protocols TS36 series, TS38 series, TS37 series.

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

receiving a first message indicating a first set of radio bearers and a second set of radio bearers;

transmitting a second message, the second message comprising RRC signaling;

starting a first timer with the second message;

determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer;

wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

As an embodiment, the above method is applicable to simultaneously support the SDT procedure and the MBS reception procedure in the RRC inactive state.

As an embodiment, the above method determines whether to transition to the first RRC state according to whether a radio bearer included in the first radio bearer set is suspended (suspended) and the state of the first timer, which may effectively support data transmission in the RRC inactive state.

According to one aspect of the application, it comprises:

the act of determining whether to transition to a first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and a state of the first timer includes: transitioning from an RRC inactive state to a first RRC state in response to expiration of the first timer when all radio bearers included in the first set of radio bearers are suspended; the first timer expiring is not used to trigger a transition from the RRC inactive state to the first RRC state when at least one radio bearer included in the first set of radio bearers is not suspended; the first RRC state is the RRC idle state.

As one embodiment, the above method may obtain the beneficial effect of saving power by transitioning from the RRC inactive state to the first RRC state.

As an embodiment, the above method may optimize the network without causing MBS reception interruption when the first timer expires without being used to trigger a transition from the RRC inactive state to the first RRC state when at least one radio bearer included in the first set of radio bearers is not suspended.

According to one aspect of the application, it comprises:

Receiving a third message, the third message being used to deactivate the first RLC;

wherein the first RLC is associated with a first radio bearer, the first radio bearer belonging to the first set of radio bearers.

As an embodiment, the above method supports flexible changing of the state of radio bearers included in the first set of radio bearers while in an RRC inactive state.

According to one aspect of the application, it comprises:

receiving a fourth message, the fourth message being used to deactivate the first configuration;

wherein the first configuration is associated with a first RNTI, the first RNTI being used to scramble radio signals carrying data packets belonging to at least one radio bearer belonging to the first set of radio bearers.

As an embodiment, the above method supports flexible changing of the scrambling of the RNTI (Radio Network Temporary Identifier ) of the radio signal that the first node needs to monitor when in the RRC inactive state, resulting in the beneficial effect of saving power.

According to one aspect of the application, it comprises:

maintaining a second timer;

wherein at least one radio bearer included in the first set of radio bearers is not suspended.

As an embodiment, the above method monitors whether all radio bearers included in the first set of radio bearers are suspended by a second timer.

According to one aspect of the application, it comprises:

the act of determining whether to transition to a first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and a state of the first timer includes: determining whether to transition to a first RRC state according to the state of the second timer and the state of the first timer; wherein when the first timer is not in an operational state, transitioning from an RRC inactive state to a first RRC state in response to expiration of the second timer; when the first timer is in an operational state, the second timer expiration is not used to trigger a transition from the RRC inactive state to the first RRC state; the first RRC state is the RRC idle state.

As an embodiment, the method may optimize the network without causing the SDT process to be interrupted when the first timer is in the running state and the second timer expires without being used to trigger the transition from the RRC inactive state to the first RRC state.

According to one aspect of the application, it comprises:

with the second message, all radio bearers included in the second set of radio bearers are restored;

wherein the second message is used to trigger the SDT

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

a first receiver that receives a first message indicating a first set of radio bearers and a second set of radio bearers;

a first transmitter that transmits a second message, the second message including RRC signaling; starting a first timer with the second message; determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer;

The application discloses a method used in a second node of wireless communication, which is characterized by comprising the following steps:

transmitting a first message indicating a first set of radio bearers and a second set of radio bearers;

receiving a second message, the second message comprising RRC signaling;

wherein a first timer is started with the second message; whether a radio bearer included in the first set of radio bearers is suspended is used together with a state of the first timer to determine whether to transition to a first RRC state; the first message is used to indicate entering an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

According to one aspect of the application, it comprises:

transmitting a third message, the third message being used to deactivate the first RLC;

According to one aspect of the application, it comprises:

transmitting a fourth message, the fourth message being used to deactivate the first configuration;

According to one aspect of the application, it comprises:

a second timer is maintained;

According to one aspect of the application, it comprises:

wherein the second message is used to trigger the SDT.

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

a second transmitter that transmits a first message indicating a first set of radio bearers and a second set of radio bearers;

a second receiver that receives a second message, the second message comprising RRC signaling;

Drawings

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

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

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

fig. 3 illustrates a schematic diagram of a radio protocol architecture of a user plane and a control plane in accordance with one embodiment of the present application;

FIG. 4 illustrates a hardware block diagram of a communication device according to one embodiment of the application;

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

fig. 6 illustrates another wireless signal transmission flow diagram in accordance with one embodiment of the present application;

FIG. 7 illustrates a process flow diagram according to one embodiment of the application;

fig. 8 illustrates a third wireless signal transmission flow diagram according to one embodiment of the application;

FIG. 9 illustrates another process flow diagram according to one embodiment of the application;

FIG. 10 illustrates a third process flow diagram according to one embodiment of the application;

FIG. 11 illustrates a flowchart of the operation of a first timer according to one embodiment of the application;

FIG. 12 illustrates a block diagram of a processing arrangement in a first node according to one embodiment of the application;

fig. 13 illustrates a block diagram of a processing arrangement in a second node according to an embodiment of the application.

Detailed Description

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

Example 1

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

In embodiment 1, the first node 100 receives a first message in step 101, the first message indicating a first set of radio bearers and a second set of radio bearers; transmitting a second message in step 102, the second message comprising RRC signaling; starting a first timer in step 103 with the second message; determining whether to transition to a first RRC state according to whether radio bearers included in the first set of radio bearers are suspended and a state of the first timer in step 104; wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

As an embodiment, the first message is received over an air interface.

As an embodiment, the air interface is an NR air interface.

As an embodiment, the air interface is a Uu interface.

As an embodiment, the first message is received by unicast.

As an embodiment, the radio signal carrying the first message is scrambled by a C-RNTI (Cell-RNTI, cell radio network temporary identity) which is used to identify the first node.

As an embodiment, the first message is higher layer signaling.

As an embodiment, the first message is RRC signaling.

As an embodiment, the first message includes all or part of an IE (Information Element ) in an RRC signaling.

For one embodiment, the first message includes all or part of a Field (Field) in an IE in an RRC signaling.

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

As a sub-embodiment of the above embodiment, the first message includes a first RRC signaling indicating the second set of radio bearers; a second RRC signaling included in the first message indicates the first set of radio bearers; wherein, the receiving time of the first RRC signaling included in the first message is earlier than the receiving time of the second RRC signaling included in the first message; only one RRC signaling is transmitted within a time interval from receiving the first RRC signaling included in the first message to receiving the second RRC signaling included in the first message, the RRC signaling being the second message.

As an embodiment, the first message is RRCRelease (RRC release).

As an embodiment, the first message includes a suspend configuration field (field).

As an embodiment, the first message is used to indicate entering an RRC inactive state.

As an embodiment, in response to receiving the first message, an RRC inactive state is entered.

As one embodiment, the phrase entering the RRC inactive state includes: entering an RRC inactive state from an RRC connected state; and the first message is in an RRC connection state when received.

As one embodiment, the phrase entering the RRC inactive state includes: maintaining an RRC inactive state; wherein the first message is in an RRC inactive state when received.

As one embodiment, the first message implicitly indicates the first set of radio bearers; wherein all radio bearers included in the first set of radio bearers are established prior to receiving the first message.

As a sub-embodiment of the above embodiment, all radio bearers included in the first set of radio bearers are suspended after receiving the first message.

As a sub-embodiment of the above embodiment, all radio bearers included in the first set of radio bearers are not suspended after receiving the first message.

As one embodiment, the first message explicitly indicates the first set of radio bearers.

As a sub-embodiment of the above embodiment, the first message includes a first set of radio bearer identities, and each radio bearer included in the first set of radio bearer identities is identified by one radio bearer identity (identity) included in the first set of radio bearer identities.

As one embodiment, the first message explicitly indicates the second set of radio bearers.

As a sub-embodiment of the above embodiment, the first message includes a second set of radio bearer identities, each radio bearer included in the second set of radio bearer identities being identified by one radio bearer identity in the second set of radio bearer identities.

As a sub-embodiment of the above embodiment, all radio bearers included in the second set of radio bearers are suspended after receiving the first message.

As an embodiment, the first message comprises an ms-Config (multicast/broadcast service configuration) field, which is used to indicate the first set of radio bearers.

As an embodiment, the first message comprises a sdt-Config field (small data transmission configuration), which sdt-Config field is used to indicate the second set of radio bearers.

As an embodiment, the first message indicates at least one non-unicast RNTI.

As an embodiment, the non-unicast RNTI is used for scrambling radio signals carrying data packets belonging to radio bearers included in the first set of radio bearers.

As an embodiment, the first node monitors a PDCCH (Physical Downlink Control Channel ) addressed to the non-unicast RNTI, the PDCCH being used for scheduling PDSCH (Physical Downlink Shared Channel ) carrying data packets belonging to radio bearers included in the first set of radio bearers.

As an embodiment, the non-unicast RNTI is a G-RNTI (Group-RNTI, packet radio network temporary identity) or a G-CS-RNTI (Group Configured Scheduling RNTI, packet configuration scheduling radio network temporary identity).

As an embodiment, the radio bearers included in the first set of radio bearers and the radio bearers included in the second set of radio bearers are used for data transmission in the RRC inactive state, respectively.

As an embodiment, radio signals carrying data packets belonging to radio bearers included in the first set of radio bearers are scrambled by the non-unicast RNTI.

As an embodiment, the radio signals carrying data packets belonging to radio bearers comprised in said first set of radio bearers are transmitted by multicast.

As an embodiment, the radio signal carrying the data packets belonging to the radio bearers comprised in the second set of radio bearers is scrambled by a unicast RNTI.

As one embodiment, the unicast RNTI includes a C-RNTI.

As an embodiment, the unicast RNTI includes a TC-RNTI (Temporary Cell-RNTI), a Temporary Cell radio network Temporary identity.

As an embodiment, the radio signals carrying the data packets belonging to the radio bearers comprised in said second set of radio bearers are transmitted by unicast.

As an embodiment, one radio bearer may belong to both the first set of radio bearers and the second set of radio bearers.

As an embodiment, the first set of radio bearers and the second set of radio bearers each comprise at least one radio bearer.

As one embodiment, the first set of radio bearers and the second set of radio bearers have no intersection.

As an embodiment, the radio bearers included in the first set of radio bearers are used for MBS.

As an embodiment, the MBS is a multicast MBS.

As an embodiment, the first Radio Bearer set includes an MRB (MBS Radio Bearer).

As an embodiment, the first set of radio bearers includes multicast MRBs.

As an embodiment, any radio bearer included in the first set of bearers corresponds to at least one RLC (Radio Link Control ) entity (entity) configured as a PTM (pointto multipoint, point-to-multipoint).

As an embodiment, any radio bearer included in the first set of radio bearers is configured to be sent only via PTM in RRC inactive state.

As an embodiment, any radio bearer included in the first set of radio bearers is configured to be sent only by ptm rlc in RRC inactive state.

As an embodiment, the first radio bearer set includes multicast PTM-only MRB.

As an embodiment, the first radio bearer set includes multicast split MRB.

As one embodiment, the radio bearers included in the second set of radio bearers are used for SDT.

As an embodiment, the second radio bearer set includes at least the former of DRB (Data Radio Bearer ) and SRB (Signaling Radio Bearer, signaling radio bearer).

As a sub-embodiment of the above embodiment, the SRB is SRB2 (signaling radio bearer 2).

As a sub-embodiment of the above embodiment, the SRB is SRB3 (signaling radio bearer 3).

As a sub-embodiment of the above embodiment, the SRB is an SRB other than SRB0 (signaling radio bearer 0).

As a sub-embodiment of the above embodiment, the SRB is an SRB other than SRB0 and SRB1 (signaling radio bearer 1).

As an embodiment, the second message is sent in an RRC inactive state.

As an embodiment, the second message comprises RRC signaling.

As one embodiment, the second message is used to trigger RRC connection recovery (resumed); with the second message, the radio bearers included in the second set of radio bearers are not restored (resumed).

As an embodiment, the RRC signaling included in the second message is an RRCResumeRequest (RRC resume request).

As an embodiment, the RRC signaling included in the second message is RRCResumeRequest1 (RRC resume request 1).

As an embodiment, a first timer is started with the second message.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: starting the first timer and sending the second message is not separable (atomic).

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: the sending of the second message and the starting of the first timer are mutually associated.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: the sending of the second message is used to start the first timer.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: when the second message is sent (Upon transmission of the first message), a first timer is started.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: the second message (Following the transmission of the first message) is sent immediately followed by a first timer.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: the second message is sent immediately after starting the first timer.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: when a random access procedure to which the second message belongs is initiated (Upon initiation of the procedure), a first timer is started.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: a first timer is started immediately after a random access procedure to which the second message belongs is initiated.

As one embodiment, the phrase accompanies the second message, and starting the first timer includes: and starting a first timer immediately, and initiating a random access process to which the second message belongs.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: and when the small data sending process of the second message is initiated, starting a first timer.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: and starting a first timer immediately after initiating a small data sending process to which the second message belongs.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: and starting a first timer immediately, and initiating a small data sending process to which the second message belongs.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: a first timer is started when a first data packet belonging to any one of the radio bearers included in the second set of radio bearers is transmitted after the second message is transmitted.

For one embodiment, the phrase accompanying the second message, starting the first timer comprises: a first timer is started when a first data packet belonging to any one of the radio bearers included in the second set of radio bearers is received after the second message is sent.

As one embodiment, the act of starting the first timer occurs while the first timer is in a non-running state.

As an embodiment, the first timer is maintained at an RRC sublayer (subtlayer).

As one embodiment, the first timer is T319.

As an embodiment, the first timer is a newsdtttimer (new SDT timer).

As one embodiment, it is determined whether to transition to the first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer.

As an embodiment, either one of whether a radio bearer included in the first set of radio bearers is suspended or the state of the first timer is not used alone to determine whether to transition to the first RRC state.

As an embodiment, only all radio bearers included in the first set of radio bearers are suspended from being used to determine whether to transition to the first RRC state.

As an embodiment, only the state of the first timer is not used to determine whether to transition to the first RRC state.

As an embodiment, the first message indicates whether a radio bearer included in the first set of radio bearers is suspended.

As one embodiment, when the first message includes a second configuration, radio bearers included in the first set of radio bearers are not suspended; when the first message does not include the second configuration, all radio bearers included in the first set of radio bearers are suspended; wherein the second configuration indicates the first set of bearers.

As an embodiment, the name of the second configuration comprises MBS.

As an embodiment, the second configuration is an mbs-config.

As an example, a radio bearer may be suspended (suspended) or not after it is established.

As an embodiment, one radio bearer is suspended or not suspended for an established radio bearer and not for a released radio bearer.

As one embodiment, a radio bearer being suspended includes: a radio bearer is established but not used for data transmission.

As one embodiment, a radio bearer being suspended includes: one radio bearer is not released and is not used for data transmission.

For one embodiment, when a radio bearer is suspended, the PDCP (Packet Data Convergence Protocol) associated with the radio bearer is indicated to the lower layer of the radio bearer.

As one embodiment, PDCP for a radio bearer is not released when the radio bearer is suspended.

As one embodiment, when a radio bearer is suspended, the radio bearer identification of the radio bearer is not released.

As one embodiment, a radio bearer not being suspended includes: one radio bearer is in an active state.

As one embodiment, a radio bearer not being suspended includes: one radio bearer is restored (reserved).

As one embodiment, a radio bearer not being suspended includes: a radio bearer is established and used for data transmission.

As one embodiment, a radio bearer not being suspended includes: one radio bearer is not released and is used for data transmission.

As an embodiment, the first RRC state is one candidate state of the first set of candidate states.

As an embodiment, the first RRC state is an RRC idle state.

As an embodiment, the first RRC state is an RRC inactive state.

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

As an embodiment, the first candidate state set includes RRC idle states.

As an embodiment, the first candidate state set includes RRC connected states.

As an embodiment, the first candidate state set includes an RRC inactive state.

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture according to one embodiment of the application, as shown in fig. 2. Fig. 2 illustrates a network architecture 200 of NR 5g, LTE (Long-Term Evolution) and LTE-a (Long-Term Evolution Advanced, enhanced Long-Term Evolution) 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 terminology. The 5GS/EPS 200 may include one or more UEs (User Equipment) 201, ng-RAN (next generation radio access network) 202,5GC (5G Core Network)/EPC (Evolved Packet Core, evolved packet core) 210, hss (Home Subscriber Server )/UDM (Unified Data Management, unified data management) 220, and internet service 230. The 5GS/EPS 200 may interconnect with other access networks, but these entities/interfaces are not shown for simplicity. As shown, the 5GS/EPS 200 provides packet switched services, however, those skilled in the art will readily appreciate that the various concepts presented throughout this disclosure may be extended to networks providing circuit switched services or other cellular networks. The NG-RAN includes NR node bs (gnbs) 203 and other gnbs 204. The gNB203 provides user and control plane protocol termination towards the UE 201. The gNB203 may be connected to other gnbs 204 via an Xn interface (e.g., backhaul). The XnAP protocol of the Xn interface is used to transmit control plane messages of the wireless network and the user plane protocol of the Xn interface is used to transmit user plane data. The gNB203 may also be referred to as a base station, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), TRP (Transmission Reception Point, transmitting receiving node), or some other suitable terminology, and in NTN networks, the gNB203 may be a satellite, an aircraft, or a terrestrial base station relayed through a satellite. The gNB203 provides the UE201 with an access point to the 5GC/EPC210. Examples of UE201 include a cellular telephone, a smart phone, a Session Initiation Protocol (SIP) phone, a laptop, a Personal Digital Assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player), a camera, a game console, an drone, an aircraft, a narrowband internet of things device, a machine-type communications device, a land vehicle, an automobile, an in-vehicle device, an in-vehicle communications unit, a wearable device, or any other similar functional device. Those of skill in the art may also refer to the UE201 as a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. gNB203 is connected to 5GC/EPC210 through an S1/NG interface. The 5GC/EPC210 includes MME (Mobility Management Entity )/AMF (Authentication Management Field, authentication management domain)/SMF (Session Management Function ) 211, other MME/AMF/SMF214, S-GW (Service Gateway)/UPF (User Plane Function ) 212, and P-GW (Packet Date Network Gateway, packet data network Gateway)/UPF 213. The MME/AMF/SMF211 is a control node that handles signaling between the UE201 and the 5GC/EPC210. In general, the MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet Protocol ) packets are transported through the S-GW/UPF212, which S-GW/UPF212 itself is connected to the P-GW/UPF213. The P-GW provides UEIP address allocation as well as other functions. The P-GW/UPF213 is connected to the internet service 230. The internet service 230 includes an operator-corresponding internet protocol service, and may specifically include the internet, an intranet, an IMS (IP Multimedia Subsystem ), and a PS (Packet Switching) streaming service.

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

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

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

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

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

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

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

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

As one embodiment, the gNB203 is a satellite device.

As an example, the gNB203 is a test device (e.g., a transceiver device that simulates a base station part function, a signaling tester).

As an embodiment, the radio link from the UE201 to the gNB203 is an uplink, which is used to perform uplink transmission.

As an embodiment, the radio link from the gNB203 to the UE201 is a downlink, which is used to perform downlink transmission.

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

Example 3

Embodiment 3 illustrates a schematic diagram of a radio protocol architecture of a user plane and a control plane according to one embodiment of the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, fig. 3 shows the radio protocol architecture of the control plane 300 for a UE and a gNB with three layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY301. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the UE and the gNB through PHY301. The L2 layer 305 includes a MAC (Medium Access Control ) sublayer 302, an RLC (Radio Link Control, radio link layer control protocol) sublayer 303, and a PDCP (Packet Data Convergence Protocol ) sublayer 304, which terminate at the gNB on the network side. The PDCP sublayer 304 provides data ciphering and integrity protection, and the PDCP sublayer 304 also provides handover support for UEs between gnbs. The RLC sublayer 303 provides segmentation and reassembly of data packets, retransmission of lost data packets by ARQ, and RLC sublayer 303 also provides duplicate data packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell among the UEs. The MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request ) operations. The RRC (Radio Resource Control ) sublayer 306 in layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer), the radio protocol architecture in the user plane 350 is substantially the same for the physical layer 351, PDCP sublayer 354 in the L2 layer 355, RLC sublayer 353 in the L2 layer 355, and MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. Also included in the L2 layer 355 in the user plane 350 is an SDAP (Service Data Adaptation Protocol ) sublayer 356, the SDAP sublayer 356 being responsible for mapping between QoS (Quality of Service ) flows and data radio bearers (Data Radio Bearer, DRBs) to support diversity of traffic. The radio protocol architecture of the UE in the user plane 350 may include some or all of the SDAP sublayer 356, pdcp sublayer 354, rlc sublayer 353 and MAC sublayer 352 at the L2 layer. Although not shown, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., remote UE, server, etc.).

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

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

As an example, the entities of the multiple sub-layers of the control plane in fig. 3 constitute signaling radio bearers (Signaling Radio Bearer, SRB) in the vertical direction.

As an example, the entities of the multiple sub-layers of the user plane in fig. 3 constitute a data radio bearer (Data Radio Bearer, DRB) in the vertical direction.

As an example, the entities of the multiple sub-layers of the user plane in fig. 3 constitute MBS Radio Bearers (MRBs) in the vertical direction.

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

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

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

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

As an embodiment, the third message in the present application is generated in the PHY301 or the PHY351.

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

As an embodiment, the fourth message in the present application is generated in the PHY301 or the PHY351.

As an embodiment, the L2 layer 305 belongs to a higher layer.

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

Example 4

Embodiment 4 illustrates a hardware module diagram of a communication device according to one embodiment of the application, as shown in fig. 4. Fig. 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in an access network.

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

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

In the transmission from the second communication device 410 to the first communication device 450, upper layer packets from the core network or upper layer packets from the data source 477 are provided to the controller/processor 475 at the second communication device 410. The core network and data source 477 represent all protocol layers above the L2 layer. The controller/processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, a controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation to the first communication device 450 based on various priority metrics. The controller/processor 475 is also responsible for retransmission of lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., physical layer). Transmit processor 416 performs coding and interleaving to facilitate Forward Error Correction (FEC) at the second communication device 410, as well as mapping of signal clusters based on various modulation schemes, e.g., binary Phase Shift Keying (BPSK), quadrature Phase Shift Keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM). The multi-antenna transmit processor 471 digitally space-precodes the coded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing, to generate one or more spatial streams. A transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes with reference signals (e.g., pilots) in the time and/or frequency domain, and then uses an Inverse Fast Fourier Transform (IFFT) to generate a physical channel carrying the time domain multicarrier symbol stream. The multi-antenna transmit processor 471 then performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multiple antenna transmit processor 471 to a radio frequency stream and then provides it to a different antenna 420.

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

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

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

As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus of the first communication device 450 to at least: receiving a first message indicating a first set of radio bearers and a second set of radio bearers; transmitting a second message, the second message comprising RRC signaling; starting a first timer with the second message; determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer; wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

As an embodiment, the first communication device 450 apparatus includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: receiving a first message indicating a first set of radio bearers and a second set of radio bearers; transmitting a second message, the second message comprising RRC signaling; starting a first timer with the second message; determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer; wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus of the second communication device 410 to at least: transmitting a first message indicating a first set of radio bearers and a second set of radio bearers; receiving a second message, the second message comprising RRC signaling; wherein a first timer is started with the second message; whether a radio bearer included in the first set of radio bearers is suspended is used together with a state of the first timer to determine whether to transition to a first RRC state; the first message is used to indicate entering an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

As an embodiment, the second communication device 410 apparatus includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: transmitting a first message indicating a first set of radio bearers and a second set of radio bearers; receiving a second message, the second message comprising RRC signaling; wherein a first timer is started with the second message; whether a radio bearer included in the first set of radio bearers is suspended is used together with a state of the first timer to determine whether to transition to a first RRC state; the first message is used to indicate entering an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

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

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

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

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

As an example, the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, at least one of the transmit processor 416 or the controller/processor 475 are used to transmit the first message of the present application.

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

As one example, at least one of the antenna 452, the transmitter 454, the multi-antenna transmit processor 457, the transmit processor 468 or the controller/processor 459 is used to transmit a second message in the present application.

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

As an example, the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, at least one of the transmit processor 416 or the controller/processor 475 are used to transmit a third message in the present application.

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

As an example, the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, at least one of the transmit processor 416 or the controller/processor 475 are used to transmit the fourth message of the present application.

As an example, at least one of the antenna 452, the receiver 454, the multi-antenna receive processor 458, the receive processor 456 or the controller/processor 459 is configured to receive a fourth message according to the present application.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow diagram according to one embodiment of the application, as shown in fig. 5. The first node and the second node communicate over an air interface. It is specifically explained that the order in this example does not limit the order of signal transmission and the order of implementation in the present application.

For the followingFirst node N51Receiving a first message in step S511; transmitting a second message in step S512; starting a first timer in step S513; receiving a third message in step S514; in step S515, it is determined whether to transition to the first RRC state according to whether or not a radio bearer included in the first radio bearer set is suspended and the state of the first timer.

For the followingSecond node N52Transmitting a first message in step S521; receiving a second message in step S522; the third message is transmitted in step S523.

In embodiment 5, a first message is received, the first message indicating a first set of radio bearers and a second set of radio bearers; transmitting a second message, the second message comprising RRC signaling; starting a first timer with the second message; determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer; wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state; the act of determining whether to transition to a first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and a state of the first timer includes: transitioning from an RRC inactive state to a first RRC state in response to expiration of the first timer when all radio bearers included in the first set of radio bearers are suspended; the first timer expiring is not used to trigger a transition from the RRC inactive state to the first RRC state when at least one radio bearer included in the first set of radio bearers is not suspended; the first RRC state is the RRC idle state; receiving a third message, the third message being used to deactivate the first RLC; wherein the first RLC is associated with a first radio bearer, the first radio bearer belonging to the first radio bearer set; with the second message, all radio bearers included in the second set of radio bearers are restored; wherein the second message is used to trigger the SDT.

After the second message is sent, at least one data packet belonging to the radio bearer included in the second radio bearer set is transmitted between the first node and the second node via the air interface, which is not shown in fig. 5.

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

As an embodiment, the second node is a base station of a primary cell (primary cell) of the first node.

As an embodiment, the second node is a base station of a secondary cell (secondary cell) of the first node.

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

As one embodiment, the second message is used to trigger an SDT procedure; with the second message, all radio bearers included in the second set of radio bearers are restored (resumed).

As an embodiment, with the second message, PDCP entities of each radio bearer included in the second set of radio bearers are re-established (re-establishment) and do not trigger PDCP status report (status report).

As an embodiment, SRB1 is recovered along with the second message.

As an embodiment, accompanying the second message, the PDCP entity is re-established for SRB 1.

As an embodiment, the SDT procedure is a random access (random access) based SDT procedure.

As one embodiment, the SDT process is a configured grant (configured grant) based SDT process.

As one embodiment, the SDT procedure is performed in an RRC inactive state.

As one embodiment, when all radio bearers included in the first set of radio bearers are suspended, transitioning from the RRC inactive state to the first RRC state in response to expiration of the first timer; wherein, the first RRC state is an RRC idle state.

As an embodiment, the first message indicates that all radio bearers included in the first set of radio bearers are suspended.

As one embodiment, the first message indicates that all radio bearers included in the first set of radio bearers are not suspended.

As one embodiment, the first message indicates that at least one radio bearer included in the first set of radio bearers is not suspended.

As an embodiment, the first timer expiration is not used to trigger a transition from the RRC inactive state to the first RRC state when the first message indicates that at least one radio bearer included in the first set of radio bearers is not suspended; wherein, the first RRC state is an RRC idle state.

As one embodiment, the RRC inactive state is maintained in response to expiration of the first timer when the first message indicates that at least one radio bearer included in the first set of radio bearers is not suspended.

As one embodiment, when the first message indicates that at least one radio bearer included in the first set of radio bearers is not suspended, all radio bearers included in the second set of radio bearers are released in response to expiration of the first timer.

As one embodiment, when the first message indicates that at least one radio bearer included in the first set of radio bearers is not suspended, all radio bearers included in the second set of radio bearers are suspended in response to expiration of the first timer.

As one embodiment, when the first message indicates that at least one radio bearer included in the first radio bearer set is not suspended, the PDCP entity and radio bearer identity corresponding to each radio bearer included in the second radio bearer set are released as a response to expiration of the first timer.

As an embodiment, a third message is received, the third message being used to deactivate the first RLC.

As an embodiment, the third message is RRC signaling.

As an embodiment, the third message includes all or part of an IE in an RRC signaling.

For one embodiment, the third message includes all or part of the Field (Field) in an IE in an RRC signaling.

As an embodiment, the third message is a MAC (Medium Access Control ) sublayer message.

As an embodiment, the third message is a MACCE (Control Element).

As an embodiment, the third message is a physical layer message.

As an embodiment, the third message is DCI (Downlink Control Information ).

As an embodiment, the third message includes a first LCID (Logical Channel Identity, logical channel identification), which is used to indicate the first RLC.

As an embodiment, the first RLC is re-established in response to receiving the third message.

As an embodiment, the first RLC is released in response to receiving the third message.

As one embodiment, the third message is received by unicast; wherein the first node is in an SDT process upon receiving the third message.

As one embodiment, the radio signal carrying the third message is scrambled by a C-RNTI, which is used to identify the first node; wherein the first node is in an SDT process upon receiving the third message.

As one embodiment, the third message is received by multicast; wherein the first node is in an RRC inactive state when receiving the third message.

As one embodiment, the radio signal carrying the third message is scrambled by a non-unicast RNTI; wherein the first node is in an RRC inactive state when receiving the third message.

As an embodiment, the non-unicast RNTI is used to identify MBS.

As an embodiment, the non-unicast RNTI is used to identify a multicast MBS.

As an embodiment, the non-unicast RNTI is used to schedule transmissions to at least one UE.

As an embodiment, the first RLC is a ptrlc.

As an embodiment, the first RLC includes one RLC entity.

As an embodiment, the first RLC is associated with a first radio bearer, which belongs to the first set of radio bearers.

As an embodiment, the first RLC is served (served) the first radio bearer.

As an embodiment, the first radio bearer is suspended in response to receiving the third message.

As an embodiment, the first receiver receives a third message, which is used to deactivate a first radio bearer, which belongs to the first radio bearer set.

As an embodiment, the third message comprises a first radio bearer identification, which is used to indicate the first radio bearer.

As an embodiment, the first receiver receives a third message, the third message being used to deactivate a first RLC associated with a first radio bearer, the first radio bearer belonging to the first set of radio bearers.

As an embodiment, the third message includes a first radio bearer identity and a first LCID, the first LCID being used to indicate the first RLC, the first radio bearer identity being used to indicate the first radio bearer.

As an embodiment, the first receiver receives a fifth message, the fifth message being used to activate a second RLC; wherein the second RLC is associated with a second radio bearer, the second radio bearer belonging to the first set of radio bearers.

As a sub-embodiment of the above embodiment, the second radio bearer is suspended before receiving the fifth message.

As an embodiment, the fifth message is MACCE.

As an embodiment, the fifth message is a physical layer message.

As an embodiment, the fifth message is DCI.

As an embodiment, the fifth message includes a second LCID, the second LCID being used to identify the second RLC.

Example 6

Embodiment 6 illustrates another wireless signal transmission flow diagram according to one embodiment of the application, as shown in fig. 6. The first node and the second node communicate over an air interface. It is specifically described that the order in this example does not limit the order of signal transmission and the order of implementation in the present application

For the followingFirst node N61Receiving a first message in step S611; transmitting a second message in step S612; starting a first timer in step S613; receiving a fourth message in step S614; in step S615, it is determined whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer.

For the following Second node N62Transmitting a first message in step S621; receiving a second message in step S622; the fourth message is sent in step S623.

In embodiment 6, a first message is received, the first message indicating a first set of radio bearers and a second set of radio bearers; transmitting a second message, the second message comprising RRC signaling; starting a first timer with the second message; determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer; wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state; receiving a fourth message, the fourth message being used to deactivate the first configuration; wherein the first configuration is associated with a first RNTI, the first RNTI being used to scramble radio signals carrying data packets belonging to at least one radio bearer belonging to the first set of radio bearers.

After the second message is sent, at least one data packet belonging to the radio bearer included in the second radio bearer set is transmitted between the first node and the second node via the air interface, which is not shown in fig. 6.

As an embodiment, a fourth message is received, which is used to deactivate the first configuration.

As an embodiment, the fourth message is RRC signaling.

As an embodiment, the fourth message includes all or part of an IE (Information Element ) in an RRC (Radio Resource Control, radio resource control) signaling.

For one embodiment, the fourth message includes all or part of the Field (Field) in an IE in an RRC signaling.

As an embodiment, the fourth message is a MAC sublayer message.

As an embodiment, the fourth message is MACCE.

As an embodiment, the fourth message is a physical layer message.

As an embodiment, the fourth message is DCI.

As an embodiment, the fourth message comprises a first configuration index, the first configuration index being used to indicate the first configuration.

As an embodiment, the first configuration is released in response to receiving the fourth message.

As one embodiment, the fourth message is received by unicast; wherein the first node is in an SDT process upon receiving the fourth message.

As one embodiment, the radio signal carrying the fourth message is scrambled by a C-RNTI, which is used to identify the first node; wherein the first node is in an SDT process upon receiving the fourth message.

As one embodiment, the fourth message is received by multicast; wherein the first node is in an RRC inactive state when receiving the fourth message.

As an embodiment, the first configuration is associated with a first RNTI.

As an embodiment, the phrase the first configuration and the first RNTI association include: a radio signal carrying the fourth message is scrambled by the first RNTI, the fourth message indicating the first configuration.

As an embodiment, the phrase the first configuration and the first RNTI association include: the radio signal carrying the first configuration is scrambled by the first RNTI.

As an embodiment, the first RNTI is a non-unicast RNTI.

As an embodiment, the first RNTI is a G-CS-RNTI.

As an embodiment, the first configuration comprises at least time domain resources on which the first node monitors a radio signal scrambled by the first RNTI.

As an embodiment, the first configuration is an SPS (Semi-Persistent Scheduling ) configuration.

As an embodiment, the first configuration is used to configure semi-static scheduling.

As an embodiment, the first RNTI is used for scrambling radio signals carrying data packets belonging to at least one radio bearer included in the first set of radio bearers.

As an embodiment, the fourth message is used to determine to suspend all radio bearers included in the first set of radio bearers when the first node is configured to multicast receive only with the first RNTI.

As an embodiment, when the first node is configured for multicast reception only with the first RNTI, all radio bearers included in the first set of radio bearers are associated with only the first RNTI.

As one embodiment, when the first node is further configured to multicast receive over at least one non-unicast RNTI other than the first RNTI, at least one radio bearer included in the first set of radio bearers is associated with the at least one non-unicast RNTI other than the first RNTI.

As a sub-embodiment of the above embodiment, the fourth message is not used to determine to suspend all radio bearers included in the first set of radio bearers.

As an embodiment, the first receiver receives a sixth message, the sixth message being used to activate a third configuration; wherein the third configuration is associated with a second RNTI, the second RNTI being used to scramble radio signals carrying data packets belonging to at least one radio bearer belonging to the first set of radio bearers.

As an embodiment, the sixth message is MACCE.

As an embodiment, the sixth message is a physical layer message.

As an embodiment, the sixth message is DCI.

As an embodiment, the sixth message comprises a third configuration index, the third configuration index being used to indicate the third configuration.

As an embodiment, the third configuration is SPS.

As an embodiment, the third configuration is used to configure semi-static scheduling.

Example 7

Embodiment 7 illustrates a process flow diagram according to one embodiment of the application, as shown in fig. 7. The steps of fig. 7 are performed at the first node.

In embodiment 7, a first timer is started in step S701; in step S702, it is determined whether the first timer has expired, and if so, step S703 is executed; if not, jumping to step S702; in step S703, it is determined whether all radio bearers included in the first radio bearer set are suspended, and if so, step S704 is performed; if not, ending; the method transitions from the RRC inactive state to the first RRC state in step S704.

As an embodiment, the first RRC state is an RRC idle state.

As one embodiment, the two processes of determining whether the first timer expires and determining whether all radio bearers included in the first radio bearer set are suspended are independent of each other; when the first timer expires, determining whether to transition from the RRC inactive state to the first RRC state according to whether all radio bearers included in the first set of radio bearers are suspended.

Example 8

Embodiment 8 illustrates a third wireless signal transmission flow diagram according to one embodiment of the application, as shown in fig. 8. The first node and the second node communicate over an air interface. It is specifically described that the order in this example does not limit the order of signal transmission and the order of implementation in the present application

For the followingFirst node N81Receiving a first message in step S811; maintaining a second timer in step S812; transmitting a second message in step S813; starting a first timer in step S814; in step S815, it is determined whether to transition to the first RRC state according to the state of the second timer and the state of the first timer.

For the followingSecond node N82Transmitting a first message in step S821; the second message is received in step S822.

In embodiment 8, a first message is received, the first message indicating a first set of radio bearers and a second set of radio bearers; transmitting a second message, the second message comprising RRC signaling; starting a first timer with the second message; determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer; wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state; maintaining a second timer; wherein at least one radio bearer included in the first set of radio bearers is not suspended; the act of determining whether to transition to a first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and a state of the first timer includes: determining whether to transition to a first RRC state according to the state of the second timer and the state of the first timer; wherein when the first timer is not in an operational state, transitioning from an RRC inactive state to a first RRC state in response to expiration of the second timer; when the first timer is in an operational state, the second timer expiration is not used to trigger a transition from the RRC inactive state to the first RRC state; the first RRC state is the RRC idle state.

After the second message is sent, at least one data packet belonging to the radio bearer included in the second radio bearer set is transmitted between the first node and the second node via the air interface, which is not shown in fig. 8.

As one embodiment, a second timer is maintained when at least one radio bearer included in the first set of radio bearers is not suspended.

As one embodiment, the second timer is not maintained when all radio bearers included in the first set of radio bearers are suspended.

As an embodiment, the second timer not being in an operating state is used to determine that radio bearers included in the first set of radio bearers are all suspended; the second timer is in an active state used to determine that at least one radio bearer included in the first set of radio bearers is not suspended.

As an embodiment, all radio bearers included in the first set of radio bearers are suspended and used to determine that the second timer is not in an operational state; at least one radio bearer included in the first set of radio bearers is not suspended and is used to determine that the second timer is in an operational state.

As an embodiment, the second timer is used to monitor whether the MBS process is over.

As an embodiment, the second timer is maintained only in RRC inactive state.

As one embodiment, the behavior maintenance second timer includes: starting the second timer with the first message; wherein the first message indicates that at least one radio bearer included in the first set of radio bearers is not suspended.

As one embodiment, the second timer is maintained in an RRC connected state and an RRC inactive state.

As a sub-embodiment of the above embodiment, the second timer is not restarted when the first message is received; wherein the first message indicates that at least one radio bearer included in the first set of radio bearers is not suspended.

As one embodiment, the behavior maintenance second timer includes: the second timer is started or restarted in response to receiving a data packet belonging to any radio bearer included in the first set of radio bearers.

As one embodiment, the behavior maintenance second timer includes: when a MAC SDU (Service Data Unit, traffic data unit) belonging to an MTCH (MBS Traffic Channel ) is received and the MTCH is associated with one radio bearer included in the first radio bearer, the second timer is started or restarted.

As one embodiment, the behavior maintenance second timer includes: starting or restarting the second timer when receiving a MACU belonging to the MTCH; wherein the MTCH is used for multicasting MBS.

As an embodiment, the data packet is a mac sdu.

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

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

As an embodiment, the name of the second timer comprises mbs.

As an embodiment, the second timer is an MBS-inactivity timer.

As an embodiment, the second timer is stopped when the third message is received or all radio bearers included in the first set of radio bearers are suspended after the fourth message.

As an embodiment, the second timer is started with the fifth message; wherein all radio bearers included in the first set of radio bearers are suspended before receiving the fifth message.

As an embodiment, the second timer is started with the sixth message; wherein all radio bearers included in the first set of radio bearers are suspended before receiving the sixth message.

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

As a sub-embodiment of the above embodiment, the second timer is not restarted after a start before stopping or expiring.

As one embodiment, the act of determining whether to transition to the first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and the state of the first timer includes: determining whether to transition to a first RRC state according to the state of the second timer and the state of the first timer; wherein when the first timer is not in an operational state, transitioning from an RRC inactive state to a first RRC state in response to expiration of the second timer; when the first timer is in an operational state, the second timer expiration is not used to trigger a transition from the RRC inactive state to the first RRC state; the first RRC state is the RRC idle state.

In one embodiment, when the first timer is not in an operational state, all radio bearers included in the first set of radio bearers are released in response to expiration of the second timer.

In one embodiment, when the first timer is not in an operation state, the PDCP entity and the radio bearer identity corresponding to each radio bearer included in the first radio bearer set are released as a response to expiration of the second timer.

As one embodiment, when the first timer is not in an operational state, all radio bearers included in the first set of radio bearers are suspended in response to expiration of the second timer.

As one embodiment, the first receiver receives a seventh message; and stopping the first timer in response to receiving the seventh message.

As an embodiment, the first timer is not in an operating state after stopping.

As an embodiment, the seventh message is RRC signaling.

As an embodiment, the seventh message is used to instruct the first node to maintain an RRC inactive state.

As an embodiment, the seventh message is RRCRelease (RRC release).

As an embodiment, the seventh message is RRCRelease including supendcon.

As an embodiment, the seventh message is RRCReject (RRC reject).

As one embodiment, the first timer not being in an operational state is used to determine not being in an SDT process; the first timer being in an operational state is used to determine that it is in an SDT process.

As one embodiment, the first node not being in an SDT process is used to determine that the first timer is not in an operational state; the first node being in an SDT process is used to determine that the first timer is in an operational state.

As one embodiment, the act of determining whether to transition to the first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and the state of the first timer includes: determining whether to transition to a first RRC state according to the state of the second timer and the state of the first timer: wherein when the second timer is not in the running state, as a response to expiration of the first timer, transitioning from the RRC inactive state to the first RRC state; when the second timer is in an operational state, the first timer expiration is not used to trigger a transition from the RRC inactive state to the first RRC state; the first RRC state is the RRC idle state.

Example 9

Embodiment 9 illustrates another process flow diagram according to one embodiment of the application, as shown in fig. 9. The steps of fig. 9 are performed at the first node.

In embodiment 9, a first timer is started in step S901; in step S902, it is determined whether the first timer has expired, and if so, step S903 is performed; if not, go to step S902; in step S903, it is determined whether the second timer is in an operating state, and if so, it ends; if not, executing step S904; the transition from the RRC inactive state to the first RRC state occurs in step S904.

As an embodiment, the first RRC state is an RRC idle state.

As an embodiment, the operation of the first timer is independent of the operation of the second timer.

As one embodiment, when the first timer expires, it is determined whether to transition from the RRC inactive state to the first RRC state according to whether the second timer is in an active state.

As one embodiment, the RRC inactive state is maintained as a response to expiration of the first timer when the second timer is in an active state.

Example 10

Embodiment 10 illustrates a third process flow diagram according to one embodiment of the application, as shown in fig. 10. The steps of fig. 10 are performed at the first node.

In embodiment 10, a second timer is maintained in step S1001; in step S1002, it is determined whether the second timer has expired, and if so, step S1003 is performed; if not, jumping to step S1002; in step S1003, it is determined whether the first timer is in an operating state, and if so, it ends; if not, executing step S1004; in step S1004, a transition is made from the RRC inactive state to the first RRC state.

As an embodiment, the first RRC state is an RRC idle state.

As one embodiment, when the second timer expires, it is determined whether to transition from the RRC inactive state to the first RRC state according to whether the first timer is in an active state.

As one embodiment, the RRC inactive state is maintained as a response to expiration of the second timer when the first timer is in an active state.

Example 11

Embodiment 11 illustrates a flowchart of the operation of the first timer according to one embodiment of the present application, as shown in fig. 11. The steps of fig. 11 are performed at the first node.

In embodiment 11, a first timer is started in step S1101; in step S1102, the first timer is updated in a next first time interval; in step S1103, it is determined whether the first timer has expired, if yes, it is ended, and if no, it jumps back to step S1102.

As one embodiment, the first timer is updated at each of the first time intervals when the first timer is in an operational state.

As one embodiment, updating the first timer at each of the first time intervals is stopped after the first timer expires.

As an embodiment, the first time interval is 1 second.

As an embodiment, the first time interval is 1 millisecond.

As an embodiment, the first time interval is one subframe (subframe).

As an embodiment, the first time interval is a slot (slot).

As an embodiment, said expiration value of said first timer comprises at least one of said first time intervals.

As an embodiment, the expiration value of the first timer and the first time interval use the same unit of measure.

As one embodiment, when the first timer is started or restarted, the value of the first timer is set to 0, and the phrase updating the first timer includes: adding 1 to the value of the first timer; the first timer expires when the value of the first timer is the expiration value of the first timer.

As one embodiment, setting the value of the first timer to the expiration value of the first timer when starting or restarting the first timer, the phrase updating the first timer includes: subtracting 1 from the value of the first timer; when the value of the first timer is 0, the first timer expires.

As one embodiment, the first timer is in an operating state after starting; the first timer is not in an operating state after expiration.

As an embodiment, the expiration value of the first timer is configured by the second node.

As one embodiment, the expiration value of the first timer is preconfigured.

As an embodiment, the expiration value of the first timer is expressed in seconds.

As one embodiment, the expiration value of the first timer is expressed in milliseconds.

As an embodiment, the expiration value of the first timer is represented in subframes (subframes).

As an embodiment, the expiration value of the first timer is expressed in time slots (slots).

As an embodiment, the operation flow of the second timer is the same as that of the first timer, and will not be described herein.

As an embodiment, the expiration value of the second timer is configured by the second node.

As one embodiment, the expiration value of the second timer is preconfigured.

As an embodiment, the expiration value of the second timer is expressed in seconds.

As an embodiment, the expiration value of the second timer is expressed in milliseconds.

As an embodiment, the expiration value of the second timer is represented in subframes (subframes).

As an embodiment, the expiration value of the second timer is expressed in time slots (slots).

Example 12

Embodiment 12 illustrates a block diagram of the processing means in the first node according to an embodiment of the application, as shown in fig. 12. In fig. 12, the processing means in the first node 1200 comprises a first receiver 1201 and a first transmitter 1202; the first node 1200 is a UE.

In embodiment 12, a first receiver 1201 receives a first message indicating a first set of radio bearers and a second set of radio bearers; a first transmitter 1202 that transmits a second message, the second message comprising RRC signaling; starting a first timer with the second message; determining whether to transition to a first RRC state according to whether a radio bearer included in the first radio bearer set is suspended and a state of the first timer; wherein the first message is used to indicate entry into an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

As one embodiment, the act of determining whether to transition to the first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and the state of the first timer includes: transitioning from an RRC inactive state to a first RRC state in response to expiration of the first timer when all radio bearers included in the first set of radio bearers are suspended; the first timer expiring is not used to trigger a transition from the RRC inactive state to the first RRC state when at least one radio bearer included in the first set of radio bearers is not suspended; the first RRC state is the RRC idle state.

As an embodiment, the first receiver 1201 receives a third message, which is used to deactivate the first RLC; wherein the first RLC is associated with a first radio bearer, the first radio bearer belonging to the first set of radio bearers.

As an embodiment, the first receiver 1201 receives a fourth message, which is used to deactivate the first configuration; wherein the first configuration is associated with a first RNTI, the first RNTI being used to scramble radio signals carrying data packets belonging to at least one radio bearer belonging to the first set of radio bearers.

For one embodiment, the first receiver 1202 maintains a second timer; wherein at least one radio bearer included in the first set of radio bearers is not suspended.

For one embodiment, the first receiver 1202 maintains a second timer; wherein at least one radio bearer included in the first set of radio bearers is not suspended; the act of determining whether to transition to a first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and a state of the first timer includes: determining whether to transition to a first RRC state according to the state of the second timer and the state of the first timer; wherein when the first timer is not in an operational state, transitioning from an RRC inactive state to a first RRC state in response to expiration of the second timer; when the first timer is in an operational state, the second timer expiration is not used to trigger a transition from the RRC inactive state to the first RRC state; the first RRC state is the RRC idle state.

As an embodiment, with the second message, all radio bearers included in the second set of radio bearers are recovered; wherein the second message is used to trigger the SDT.

As an example, the first receiver 1201 includes the receiver 454 (including the antenna 452), the receive processor 456, the multi-antenna receive processor 458, and the controller/processor 459 of fig. 4 of the present application.

As an example, the first receiver 1201 includes at least one of the receiver 454 (including the antenna 452), the receive processor 456, the multi-antenna receive processor 458, or the controller/processor 459 of fig. 4 of the present application.

As an example, the first receiver 1201 includes the controller/processor 459 of fig. 4 of the present application.

As one example, the first transmitter 1102 includes the transmitter 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457, and the controller/processor 459 of fig. 4 of the present application.

As one example, the first transmitter 1102 includes at least one of the transmitter 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457, or the controller/processor 459 of fig. 4 of the present application.

As an example, the first transmitter 1102 includes the controller/processor 459 of fig. 4 of the present application.

Example 13

Embodiment 13 illustrates a block diagram of the processing means in the second node according to an embodiment of the application, as shown in fig. 13. In fig. 13, the processing means in the second node 1300 includes a second receiver 1301 and a second transmitter 1302; the second node 1300 is a base station.

In embodiment 13, a second transmitter 1302 sends a first message indicating a first set of radio bearers and a second set of radio bearers; a second receiver 1301 that receives a second message including RRC signaling; wherein a first timer is started with the second message; whether a radio bearer included in the first set of radio bearers is suspended is used together with a state of the first timer to determine whether to transition to a first RRC state; the first message is used to indicate entering an RRC inactive state; the radio bearers included in the first set of radio bearers are used for MBS; the radio bearers included in the second set of radio bearers are used for SDT; at least one radio bearer is respectively included in the first radio bearer set and the second radio bearer set; the first RRC state is one of a first set of candidate states, the first set of candidate states including an RRC idle state.

As an embodiment, the second transmitter 1302 transmits a third message, which is used to deactivate the first RLC; wherein the first RLC is associated with a first radio bearer, the first radio bearer belonging to the first set of radio bearers.

As an embodiment, the second transmitter 1302 sends a fourth message, which is used to deactivate the first configuration; wherein the first configuration is associated with a first RNTI, the first RNTI being used to scramble radio signals carrying data packets belonging to at least one radio bearer belonging to the first set of radio bearers.

As one embodiment, a second timer is maintained; wherein at least one radio bearer included in the first set of radio bearers is not suspended.

As one embodiment, a second timer is maintained; wherein at least one radio bearer included in the first set of radio bearers is not suspended; the act of determining whether to transition to a first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and a state of the first timer includes: determining whether to transition to a first RRC state according to the state of the second timer and the state of the first timer; wherein when the first timer is not in an operational state, transitioning from an RRC inactive state to a first RRC state in response to expiration of the second timer; when the first timer is in an operational state, the second timer expiration is not used to trigger a transition from the RRC inactive state to the first RRC state; the first RRC state is the RRC idle state.

The second receiver 1301, as an example, includes the receiver 418 (including the antenna 420), the receive processor 470, the multi-antenna receive processor 472, and the controller/processor 475 of fig. 4 of the present application.

As an example, the second receiver 1301 includes at least one of the receiver 418 (including the antenna 420), the receiving processor 470, the multi-antenna receiving processor 472, or the controller/processor 475 of fig. 4 of the present application.

As an example, the second transmitter 1302 includes the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 and the controller/processor 475 of fig. 4 of the present application.

As one example, the second transmitter 1302 includes at least one of the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471, or the controller/processor 475 of fig. 4 of the present application.

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

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

Claims

1. A first node for wireless communication, comprising:

2. The first node of claim 1, wherein the act of determining whether to transition to a first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and a state of the first timer comprises: transitioning from an RRC inactive state to a first RRC state in response to expiration of the first timer when all radio bearers included in the first set of radio bearers are suspended; the first timer expiring is not used to trigger a transition from the RRC inactive state to the first RRC state when at least one radio bearer included in the first set of radio bearers is not suspended; the first RRC state is the RRC idle state.

3. The first node according to claim 1 or 2, comprising:

the first receiver receiving a third message, the third message being used to deactivate the first RLC;

4. A first node according to any of claims 1 to 3, comprising:

The first receiver receiving a fourth message, the fourth message being used to deactivate the first configuration;

5. The first node according to any of claims 1 to 4, comprising:

the first receiver maintaining a second timer;

6. The first node of claim 5, wherein the act of determining whether to transition to a first RRC state based on whether a radio bearer included in the first set of radio bearers is suspended and a state of the first timer comprises: determining whether to transition to a first RRC state according to the state of the second timer and the state of the first timer; wherein when the first timer is not in an operational state, transitioning from an RRC inactive state to a first RRC state in response to expiration of the second timer; when the first timer is in an operational state, the second timer expiration is not used to trigger a transition from the RRC inactive state to the first RRC state; the first RRC state is the RRC idle state.

7. The first node according to any of claims 1-6, characterized in that with the second message, all radio bearers comprised in the second set of radio bearers are restored;

wherein the second message is used to trigger the SDT.

8. A second node for wireless communication, comprising:

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

transmitting a second message, the second message comprising RRC signaling;

starting a first timer with the second message;

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

Receiving a second message, the second message comprising RRC signaling;