WO2023217076A1

WO2023217076A1 - Method and device for wireless communication

Info

Publication number: WO2023217076A1
Application number: PCT/CN2023/092723
Authority: WO
Inventors: 张锦芳; 张晓博
Original assignee: 上海朗帛通信技术有限公司
Priority date: 2022-05-13
Filing date: 2023-05-08
Publication date: 2023-11-16
Also published as: CN117098251A

Abstract

The present application discloses a method and device for wireless communication. A first node receives a first paging message; determines a first sub-message according to whether a first condition set is satisfied; and in response to receiving the first paging message, sends a first message which comprises the first sub-message. The first paging message indicates that a first radio bearer set performs data transmission in an RRC inactive state. The action of determining the first sub-message according to whether the first condition set is satisfied comprises: when all the conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; and when any condition in the first condition set is not satisfied, the first sub-message belongs to a second candidate message set. The first condition set at least comprises uplink data to be processed that does not belong to a radio bearer other than the first radio bearer set. The present application effectively supports small data transmission triggered by downlink.

Description

A method and device for wireless communication

Technical field

The present application relates to methods and devices in wireless communication systems, and in particular to methods and devices in wireless communication that support the transmission of downlink-triggered small data (DL-triggered small data) in the RRC inactive state.

Background technique

The RRC (radio resource control, radio resource control) inactive (RRC_INACTIVE) state is a newly introduced RRC state in NR (New Radio, new air interface). When the user enters the RRC inactive state, the user can retain some network configuration information. When services arrive, users can re-enter the RRC connection (RRC_CONNECTED) state for data transmission. Until Rel (version)-16, data transmission in the RRC inactive state is not supported in 3GPP (3rd Generation Partner Project) RAN (Radio Access Network).

The application scenarios of future wireless communication systems will become more and more diverse. With the rapid development of the Internet of Things, small data services will be an important business in future wireless communications. Small data services have the characteristics of small data volume and low transmission frequency. For small data transmission, the signaling overhead of RRC state transition is greater than the transmission overhead of small data. It also increases the power consumption overhead of UE (User Equipment). Therefore, at the 3GPP RAN#88e plenary meeting, it was decided to start the WI (Work Item, work item) standardization work for small data transmission (SDT) triggered by uplink data when RRC is inactive; at the 3GPP RAN#94e The plenary meeting decided to start WI standardization work for small data transmission triggered by downlink data when RRC is inactive.

Contents of the invention

The inventor found through research that the UE is in an RRC inactive state. When downlink small data arrives, the network instructs the UE to initiate small data communication by paging the UE. After the UE receives the paging message and before accessing the network, uplink non-small data may arrive. How the UE indicates to the network whether it communicates through SDT or needs to enter the RRC connection state for communication needs to be studied.

In response to the above problems, this application discloses a solution that supports downlink-triggered small data transmission in the RRC inactive state. After receiving the paging message instructing the UE to maintain the RRC inactive state to perform small data transmission, the UE will perform small data transmission according to whether there is Uplink data indicates to the network, so that the network and UE can reach the same understanding, achieve the beneficial effect of saving signaling overhead, and flexibly support data transmission of SDT and RRC connection status. In the case of no conflict, the embodiments and features in the embodiments of the first node of the present application can be applied to the second node, and vice versa. The embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily without conflict. Furthermore, although the original intention of this application is for the Uu air interface, this application can also be used for the PC5 interface. Furthermore, although the original intention of this application is for the terminal and base station scenario, this application is also applicable to the V2X (Vehicle-to-Everything, Internet of Vehicles) scenario, the communication scenario between the terminal and the relay, and the relay and the base station. , achieving similar technical effects in terminal and base station scenarios. In addition, using unified solutions for different scenarios (including but not limited to V2X scenarios and communication scenarios between terminals and base stations) can also help reduce hardware complexity and costs. In particular, for the explanation of terms (Terminology), nouns, functions, and variables in this application (if not otherwise specified), you may refer to the definitions in the 3GPP standard protocols TS36 series, TS38 series, and TS37 series.

This application discloses a method used in a first node of wireless communication, which is characterized by including:

receiving a first paging message, the first paging message indicating the first node;

Determine the first sub-message according to whether the first set of conditions is satisfied;

In response to receiving the first paging message, sending a first message, the first message including the first sub-message;

Wherein, the first paging message instructs the first radio bearer set to perform data transmission in the RRC inactive state; the behavior is determined based on whether the first condition set is satisfied. The first sub-message includes: when the first condition set is When all conditions in the first condition set are met, the first sub-message belongs to the first candidate message set; when any condition in the first condition set is not met, the first sub-message belongs to the second candidate message set ; The first condition set at least includes pending uplink data that does not belong to radio bearers outside the first radio bearer set.

As an embodiment, the above method is suitable for downlink triggered small data transmission.

As an embodiment, the above method uses the first paging message to instruct the radio bearers in the first radio bearer set to perform data transmission in the RRC inactive state, which can reduce signaling overhead caused by RRC state transition.

As an embodiment, the above method uses the first paging message to instruct the radio bearers in the first radio bearer set to perform data transmission in the RRC inactive state, which can reduce access delay.

As an embodiment, the traditional method sets the first sub-message according to the first paging message; the appeal method further sets the first sub-message based on whether the first condition set is satisfied, so that the network and the UE can achieve the same It is understood that the recovery of radio bearers other than the first radio bearer is accelerated.

As an embodiment, the appeal method indicates the network through the first sub-message, which can flexibly realize backward compatibility and help reduce hardware complexity and cost.

As an embodiment, any radio bearer in the first radio bearer set is configured for data transmission in an RRC inactive state.

As an embodiment, any radio bearer in the first radio bearer set is configured for downlink-triggered small data transmission.

As an embodiment, radio bearers outside the first radio bearer set are not configured for data transmission in the RRC inactive state.

As an embodiment, in the RRC inactive state, radio bearers outside the first radio bearer set remain in a suspended state.

As an embodiment, in the RRC inactive state, the radio bearers in the first radio bearer set are restored in an SDT process; wherein the SDT process is triggered by downlink data, or the SDT process is triggered by uplink data.

According to one aspect of the application, includes:

The first message belongs to one of the SDT process or the first random access process;

Wherein, all conditions in the first condition set are satisfied; the air interface resources occupied by the PRACH included in the first random access process are reserved for non-SDT triggered random access processes.

As an embodiment, the SDT process includes one of RA (Random Access, random access)-SDT process or CG (Configured Grant, configuration grant)-SDT process.

As an embodiment, the air interface resources occupied by PRACH (Physical Random Access CHannel, physical random access channel) included in the RA-SDT process are reserved for the random access process triggered by SDT.

As an embodiment, the above method indicates the network through the PRACH resources reserved for the RA-SDT, so that the network and the UE can reach the same understanding.

As an embodiment, the above method realizes that the first node performs SDT in the RRC inactive state, which can significantly reduce signaling overhead, and at the same time, the user equipment obtains the beneficial effect of power saving.

As an embodiment, the above method can improve access reliability.

As an embodiment, when the PRACH resources or configured uplink grant resources included in the SDT process are earlier than the PRACH resources included in the first random access process in the time domain, the first message belongs to the SDT process; when the When the PRACH resources or configured uplink grant resources included in the SDT process are later than the PRACH resources included in the first random access process in the time domain, the first message belongs to the first random access process.

As an embodiment, the above method can reduce access delay.

According to one aspect of the application, includes:

Along with sending the first message, all radio bearers in the first radio bearer set are restored.

According to one aspect of the application, includes:

In response to receiving the first paging message, all radio bearers in the first set of radio bearers are restored.

As an embodiment, the above method can reduce access delay.

According to one aspect of the application, includes:

Receive a second message, the second message being a response to the first message, the second message being used to restore at least all radio bearers in the first radio bearer set;

Wherein, the first message belongs to the second random access process, and the air interface resources occupied by the PRACH included in the second random access process are reserved for non-SDT triggered random access processes; the first set of conditions None of the conditions are met.

As an embodiment, the above method can be backward compatible with existing technology, helping to reduce hardware complexity and cost.

According to one aspect of the application, includes:

Radio bearers outside the first radio bearer set are not configured to perform data transmission in the RRC inactive state, or radio bearers outside the first radio bearer set have not yet been established.

According to one aspect of the application, includes:

Receive a third message before receiving the first paging message, the third message being used to indicate entering or maintaining the RRC inactive state;

Wherein, the third message indicates the first radio bearer set.

This application discloses a method used in a second node of wireless communication, which is characterized by including:

Send a first paging message, the first paging message indicating the first node;

in response to sending the first paging message, receiving a first message, the first message including a first sub-message;

Wherein, whether the first condition set is satisfied is used to determine the first sub-message; the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state; whether the first condition set is satisfied Satisfaction is used to determine the first sub-message including: when all conditions in the first condition set are met, the first sub-message belongs to the first candidate message set; when in the first condition set When any condition of is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes pending messages that do not belong to radio bearers other than the first radio bearer set. Upstream data.

According to one aspect of the application, includes:

As the first message is sent, all radio bearers in the first radio bearer set are restored.

According to one aspect of the application, includes:

In response to the first paging message being received, all radio bearers in the first set of radio bearers are restored.

According to one aspect of the application, includes:

In response to receiving the first message, sending a second message, the second message being used to restore at least all radio bearers in the first set of radio bearers;

According to one aspect of the application, includes:

Send a third message before sending the first paging message, the third message being used to indicate entering or maintaining the RRC inactive state;

Wherein, the third message indicates the first radio bearer set.

This application discloses a first node used for wireless communication, which is characterized by including:

A first receiver receives a first paging message, the first paging message indicating the first node;

The first transmitter determines the first sub-message according to whether the first condition set is satisfied; in response to receiving the first paging message, sends a first message, the first message including the first sub-message;

This application discloses a second node used for wireless communication, which is characterized in that it includes:

a second transmitter, sending a first paging message, the first paging message indicating the first node;

a second receiver, in response to sending the first paging message, receiving a first message, where the first message includes a first sub-message;

Description of the drawings

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

Figure 1 illustrates a transmission flow chart of a first node according to an embodiment of the present application;

Figure 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application;

Figure 3 illustrates a schematic diagram of the wireless protocol architecture of the user plane and control plane according to one embodiment of the present application;

Figure 4 illustrates a schematic diagram of a hardware module of a communication device according to an embodiment of the present application;

Figure 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application;

Figure 6 illustrates another wireless signal transmission flow chart according to an embodiment of the present application;

Figure 7 illustrates a third wireless signal transmission flow chart according to an embodiment of the present application;

Figure 8 illustrates a schematic format diagram of a first paging message according to an embodiment of the present application;

Figure 9 illustrates a schematic format diagram of a first message according to an embodiment of the present application;

Figure 10 illustrates a structural block diagram of a processing device in a first node according to an embodiment of the present application;

Figure 11 illustrates a structural block diagram of a processing device in the second node according to an embodiment of the present application.

Detailed ways

The technical solution of the present application will be further described in detail below with reference to the accompanying drawings. It should be noted that, as long as there is no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Example 1

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

In Embodiment 1, the first node 100 receives a first paging message in step 101, and the first paging message indicates the first node; in step 102, the first node 100 determines the first paging message according to whether the first condition set is satisfied. sub-message; in step 103, as a response to receiving the first paging message, send a first message, the first message including the first sub-message; wherein the first paging message indicates the first wireless The bearer set is used to perform data transmission in the RRC inactive state; the behavior is determined based on whether the first set of conditions is satisfied. The first sub-message includes: when all conditions in the first set of conditions are met, the The first sub-message belongs to the first candidate message set; when any condition in the first condition set is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes no Pending uplink data belonging to radio bearers outside the first radio bearer set.

As an embodiment, the first node is in an RRC inactive state before receiving the first paging message.

As an embodiment, the first paging message is received from an air interface, and the air interface is a Uu interface.

As an embodiment, the first paging message explicitly indicates the first node.

As an embodiment, the first paging message implicitly indicates the first node.

As an embodiment, the phrase the first paging message indicating the first node includes: the first paging message includes a first identifier, and the first identifier is used to identify the first node.

As an embodiment, the phrase the first paging message indicates that the first node includes: the first paging message includes a second identifier, and the first node has joined the network indicated by the second identifier. One or more MBS (multicast/broadcast service, multicast broadcast service) sessions and the first paging message does not include the identity of the first node allocated by the upper layer.

As an embodiment, the first paging message is received in a paging occasion of the first node.

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

As an embodiment, the first paging message is a RAN paging message.

As an embodiment, the first paging message is not a CN (core network, core network) paging message.

As an embodiment, the first paging message is not used to change the RRC state of the first node.

As an embodiment, the first identity is allocated by RAN.

As an embodiment, the first identifier is not assigned by an upper layer.

As an embodiment, the upper layer is a core network.

As an embodiment, the upper layer is NAS (Non-access stratum).

As an embodiment, the first identifier is I (Inactive, inactive)-RNTI (Radio Network Temporary Identifier, wireless network temporary identifier).

As an embodiment, the first identifier includes a complete I-RNTI value.

As an embodiment, the first identifier includes 40 bits.

As an embodiment, the second identifier is TMGI (Temporary Mobile Group Identity, temporary mobile group identifier).

As an embodiment, the first paging message instructs the first radio bearer set to perform data transmission in the RRC inactive state.

As an embodiment, the first paging message indicating that the first radio bearer set performs data transmission in the RRC inactive state means that the first paging message indicates SDT.

As an embodiment, the first paging message indicating that the first radio bearer set performs data transmission in the RRC inactive state means that the first paging message indicates MT (mobile terminated, mobile terminal terminated)-SDT.

As an embodiment, the first paging message indicates that the reason for paging the first node is to restore all radio bearers in the first radio bearer set and perform data transmission in the RRC inactive state.

As an embodiment, any radio bearer in the first radio bearer set is used for data transmission in the RRC inactive state.

As an embodiment, any radio bearer in the first radio bearer set is in a suspended state before receiving the first paging message.

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

As an embodiment, in response to receiving the first paging message, a first message is sent.

As an embodiment, the first paging message is used to initiate an RRC connection recovery process.

As an embodiment, the first message is used to request to restore the RRC connection.

As an embodiment, the first message is a CCCH (Common Control Channel) message.

As an embodiment, the first message is RRC signaling.

As an embodiment, the first message is carried in all or part of IE (Information element) in RRC signaling.

As an embodiment, the first message is carried in all or part of a field (field) in an IE in RRC signaling.

As an embodiment, the first message is RRCResumeRequest (RRC recovery request).

As an embodiment, the first message is RRCResumeRequest1 (RRC recovery request 1).

As an embodiment, the first message includes at least some bits of the first identifier; wherein the first identifier is I-RNTI.

As an embodiment, the first message includes the first identifier.

As an embodiment, the first identifier includes 40 bits, and the first message includes 24 bits of the first identifier.

As an embodiment, the first message includes a first sub-message.

As an embodiment, the first sub-message is a field in the first message.

As an embodiment, the first sub-message is resumeCause.

As an embodiment, the first sub-message is determined according to whether a first set of conditions is satisfied.

As an embodiment, the first set of conditions includes at least one condition.

As an embodiment, the first condition set at least includes the condition that there is no pending uplink data belonging to radio bearers outside the first radio bearer set.

As an embodiment, the first set of conditions includes that there is no uplink data to be processed belonging to the first radio bearer set, or there is uplink data to be processed belonging to the first radio bearer set and the condition that triggers the SDT process is satisfy this condition.

As an embodiment, the conditions for triggering the SDT process include satisfying the following five conditions: the upper layer requests RRC connection recovery; SIB1 (System Information Block, System Information Block 1) includes sdt-ConfigCommon (small data transmission common configuration); sdt-Config (small data transmission configuration) is configured; all pending uplink data is mapped to the radio bearer configured with SDT; the lower layer layer) indicates that the conditions for triggering SDT are met.

As an embodiment, the condition for triggering the SDT process is satisfied including satisfying the condition in Chapter 5.3.13 of the 3GPP standard TS38.331.

As an embodiment, the bottom layer indicating that the conditions for triggering SDT are met includes satisfying the following two conditions: the data volume of the to-be-processed uplink data mapped to all radio bearers configured with SDT is not greater than the first threshold; the downlink path The RSRP (Reference Signal Received Power, reference signal received power) of the downlink pathloss reference is higher than the second threshold.

As an embodiment, the bottom layer indicates that the conditions for triggering SDT are met including meeting the conditions in Chapter 5.27 of the 3GPP standard TS38.31.

As an embodiment, any radio bearer in the first radio bearer set is configured with SDT.

As an embodiment, all the uplink data to be processed is mapped to the radio bearer configured with SDT means: all the uplink data to be processed is mapped to the radio bearer in the first radio bearer set.

As an embodiment, the first threshold and the second threshold are respectively configured by the network.

As an embodiment, the first threshold is sdt-DataVolumeThreshold (small data transmission data volume threshold).

As an embodiment, the second threshold is sdt-RSRP-Threshold (Small Data Transmission Reference Signal Received Power Threshold).

As an embodiment, the arrival of the uplink data to be processed is no earlier than the reception of the first paging message.

As an embodiment, the behavior of determining the first sub-message based on whether the first condition set is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to the first candidate message. set; when any condition in the first condition set is not satisfied, the first sub-message belongs to the second candidate message set.

As an embodiment, the first condition set only includes uplink data to be processed that does not belong to radio bearers outside the first radio bearer set.

As a sub-embodiment of the above embodiment, when there is no uplink data to be processed belonging to a radio bearer outside the first radio bearer set, the first condition set is satisfied; when there is no pending uplink data belonging to a radio bearer outside the first radio bearer set; When the uplink data to be processed is received from a radio bearer outside the set, the first set of conditions is not satisfied.

As an embodiment, the first condition set includes two conditions: one condition is that there is no pending uplink data belonging to radio bearers outside the first radio bearer set, and the other condition is that there is no pending uplink data belonging to the first radio bearer set. There is uplink data to be processed in the radio bearer set, or there is uplink data to be processed belonging to the first radio bearer set and the conditions for triggering the SDT process are met.

As a sub-embodiment of the above embodiment, when there is no uplink data to be processed belonging to radio bearers other than the first radio bearer set, and there is no uplink data to be processed belonging to the first radio bearer set, or, there is When the uplink data to be processed belongs to the first radio bearer set and the conditions for triggering the SDT process are met, all conditions of the first condition set are met; when there is radio data belonging to the first radio bearer set other than the first radio bearer set. When there is uplink data to be processed on a bearer, the first set of conditions is not met, or when there is uplink data to be processed belonging to the first radio bearer set and the conditions for triggering the SDT process are not met, the first condition is The collection is not satisfied.

As an embodiment, the first candidate message set is orthogonal to the second candidate message set.

As an embodiment, any message in the first candidate message set is used to indicate that the reason for sending the first message is in response to the first paging message.

As an embodiment, any message in the first candidate message set is used to indicate to the network that the reason why the first node sends the first message is to continue to maintain the RRC inactive state and perform SDT.

As an embodiment, any message in the first candidate message set is used to indicate that there is no pending uplink data belonging to radio bearers outside the first radio bearer set.

As an embodiment, any message in the second candidate message set is used to indicate that there is pending uplink data belonging to a radio bearer other than the first radio bearer set, or that there is pending uplink data belonging to a radio bearer other than the first radio bearer set. Either of the two conditions for carrying the set of pending uplink data and triggering the SDT process is not met.

As an embodiment, any message in the second candidate message set is used to indicate that the reason for sending the first message is mobile originated (mobile originated).

As an embodiment, any message in the second candidate message set is used to indicate to the network that the reason why the first node sends the first message is that the RRC connection needs to be restored and data transmission needs to be performed.

As an embodiment, the first candidate message set at least includes highPriorityAccess (high priority access), mt-Access (mobile Mobile terminal terminated access), mps (Multimedia Priority Service, multimedia priority service)-PriorityAccess (priority access) and mcs (Mission Critical Service, emergency service)-PriorityAccess.

As an embodiment, when the first sub-message belongs to the first candidate message set, the first sub-message is determined according to the access identity (Access Identity) of the first node configured by the upper layer (upper layer). .

As an embodiment, when the first node is configured with access identifier 1 by the upper layer, the first sub-message is mps-PriorityAccess.

As an embodiment, when the first node is configured with access identifier 2 by the upper layer, the first sub-message is mcs-PriorityAccess.

As an embodiment, when the first node is configured with access identifier 11-15 by the upper layer, the first sub-message is highPriorityAccess.

As an embodiment, when the first node has not been configured with an upper layer access identifier 1, or an access identifier 2, or an access identifier 11-15, the first sub-message is mt (Mobile Terminated, mobile terminal Terminate)-Access.

As an embodiment, the second candidate message set at least includes mo (Mobile Originated, mobile initiated)-Signalling (signaling), mo-Data (data), mo-VoiceCall (voice call), mo-VideoCall (video Telephone), mo-SMS (Short Message Service, short message service) and rna (RAN area,)-Update.

As an embodiment, when the first sub-message belongs to the second candidate message set, the first sub-message is provided by an upper layer.

As an embodiment, when the first sub-message belongs to the second candidate message set, the first sub-message is provided by the RRC sublayer.

As an embodiment, when there is pending uplink signaling belonging to a radio bearer outside the first radio bearer set, the first sub-message is mo-Signalling.

As an embodiment, when there is pending uplink data belonging to a radio bearer outside the first radio bearer set, the first sub-message is mo-Data.

As an embodiment, when there is a pending uplink voice call belonging to a radio bearer outside the first radio bearer set, the first sub-message is mo-VoiceCall.

As an embodiment, when there is a pending uplink video call belonging to a radio bearer outside the first radio bearer set, the first sub-message is mo-VideoCall.

As an embodiment, when there is a pending uplink short message belonging to a radio bearer outside the first radio bearer set, the first sub-message is mo-SMS.

As an embodiment, when there is an RNA (RAN-basedNotification Area, radio access network-based notification area) update, the first sub-message is rna-Update (update).

Example 2

Embodiment 2 illustrates a schematic diagram of a network architecture according to an embodiment of the present application, as shown in Figure 2. Figure 2 illustrates a diagram of the network architecture 200 of NR 5G, LTE (Long-Term Evolution, 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 called 5GS (5G System)/EPS (Evolved Packet System) 200 or some other suitable term. 5GS/EPS 200 may include one or more UE (User Equipment) 201, NG-RAN (Next Generation Radio Access Network) 202, 5GC (5G Core Network, 5G Core Network)/EPC (Evolved Packet Core, Evolved Packet Core) 210, HSS (Home Subscriber Server, Home Subscriber Server)/UDM (Unified Data Management, Unified Data Management) 220 and Internet Services 230. 5GS/EPS can be interconnected with other access networks, but for simplicity it is not Expose these entities/interfaces. As shown, 5GS/EPS provides packet-switched services, however those skilled in the art will readily appreciate that the various concepts presented throughout this application may be extended to networks that provide circuit-switched services or other cellular networks. NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol termination towards UE 201. gNB 203 may connect to other gNBs 204 via the Xn interface (eg, backhaul). gNB203 can also be called a base station, base transceiver station, radio base station, radio transceiver, transceiver function, Basic Service Set (BSS), Extended Service Set (ESS), TRP (Transmission Reception Point, Transmitting and receiving node) or some other suitable terminology, in an NTN (Non Terrestrial Network, non-terrestrial/satellite network) network, gNB203 can be a satellite, an aircraft or a ground base station relayed through a satellite. gNB203 provides UE201 with an access point to 5GC/EPC210. Examples of UE201 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptops, Personal Digital Assistants (PDAs), satellite radios, global positioning systems, multimedia devices, Video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband IoT devices, Machine type communication devices, land vehicles, automobiles, in-vehicle equipment, in-vehicle communication units, wearable devices, or any other similarly functional device. Those skilled in the art may also refer to UE 201 as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, Mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client or some other suitable term. gNB203 is connected to 5GC/EPC210 through the S1/NG interface. 5GC/EPC210 includes MME (MobilityManagementEntity, mobility management entity)/AMF (Authentication Management Field, authentication management domain)/SMF (Session Management Function, session management function) 211, Other MME/AMF/SMF214, S-GW (Service Gateway, Service Gateway)/UPF (UserPlane Function, User Plane Function) 212 and P-GW (Packet Date Network Gateway, Packet Data Network Gateway)/UPF213. MME/AMF/SMF211 is the control node that handles signaling between UE201 and 5GC/EPC210. Basically, MME/AMF/SMF211 provides bearer and connection management. All user IP (Internet Protocol, Internet Protocol) packets are transmitted through S-GW/UPF212, and S-GW/UPF212 itself is connected to P-GW/UPF213. P-GW provides UE IP address allocation and other functions. P-GW/UPF 213 is connected to Internet service 230. Internet service 230 includes the operator's corresponding Internet protocol service, which may specifically include Internet, intranet, IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) and PS (Packet Switching, packet switching) streaming services.

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

As an embodiment, the NR node B 203 corresponds to the second node in this application.

As an embodiment, the gNB 203 is a macro cell (Marco Cell) base station.

As an embodiment, the gNB 203 is a Micro Cell base station.

As an embodiment, the gNB 203 is a Pico Cell base station.

As an embodiment, the gNB 203 is a home base station (Femtocell).

As an embodiment, the gNB 203 is a base station device that supports a large delay difference.

As an embodiment, the gNB 203 is a flying platform device.

As an embodiment, the gNB 203 is a satellite device.

As an embodiment, the gNB 203 is a test equipment (for example, a transceiver device that simulates part of the functions of a base station, a signaling tester).

As an embodiment, the wireless link from the UE 201 to the gNB 203 is an uplink, and the uplink is used to perform uplink transmission.

As an embodiment, the wireless link from the gNB 203 to the UE 201 is a downlink, and the downlink 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 the wireless protocol architecture of the user plane and control plane according to an embodiment of the present application, as shown in FIG. 3 . Figure 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300. Figure 3 shows the radio protocol architecture of the control plane 300 of a UE and a gNB using three layers: Layer 1, Layer 2 and Layer 3. . Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be called PHY301 in this article. Layer 2 (L2 layer) 305 is above the PHY 301 and is responsible for the link between the UE and the gNB through the PHY 301. L2 layer 305 includes MAC (Medium Access Control, media access control) sublayer 302, RLC (Radio Link Control, wireless link layer control protocol) sublayer 303 and PDCP (Packet Data Convergence Protocol, packet data convergence protocol) sublayer 304, these sub-layers terminate at the gNB on the network side. The PDCP sublayer 304 provides data encryption and integrity protection. The PDCP sublayer 304 also provides handover support for UEs between gNBs. The RLC sublayer 303 provides segmentation and reassembly of data packets, and realizes retransmission of lost data packets through ARQ. The 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 various radio resources (eg, resource blocks) in a cell among UEs. The MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request, Hybrid Automatic Repeat Request) operations. The RRC (Radio Resource Control, radio resource control) sublayer 306 in layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (ie, radio bearers) and configuring the lower part using RRC signaling between gNB and UE. layer. Although not shown, there may also be a V2X layer above the RRC sublayer 306 in the control plane 300 of the UE. The V2X layer is responsible for generating PC5 QoS parameter groups and QoS rules based on received service data or service requests, corresponding to the PC5 QoS parameter group. Generate a PC5 QoS flow and send the PC5 QoS flow identifier and the corresponding PC5 QoS parameter group to the AS (Access Stratum, access layer) layer for QoS processing of the data packets belonging to the PC5 QoS flow identifier by the AS layer; The V2X layer also includes the PC5-S Signaling Protocol (PC5-Signaling Protocol) sublayer. The V2X layer is responsible for instructing the AS layer whether each transmission is PC5-S transmission or V2X service data transmission. The wireless protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer). The wireless protocol architecture in the user plane 350 is for the physical layer 351, the PDCP sublayer 354 in the L2 layer 355, and the PDCP sublayer 354 in the L2 layer 355. The RLC sublayer 353 and the MAC sublayer 352 in the L2 layer 355 are substantially the same as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer packets to reduce wireless Send overhead. The L2 layer 355 in the user plane 350 also includes the SDAP (Service Data Adaptation Protocol, Service Data Adaptation Protocol) sublayer 356. The SDAP sublayer 356 is responsible for the QoS (Quality of Service, quality of service) flow and data radio bearer (DRB, Data Radio Bearer) to support business diversity. The wireless protocol architecture of the UE in the user plane 350 may include part or all of the protocol sublayers of the SDAP sublayer 356, the PDCP sublayer 354, the RLC sublayer 353 and the 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 that terminates at the P-GW on the network side (eg, an IP layer) and one that terminates at the other end of the connection (eg, , the application layer at the remote UE, server, etc.).

As an embodiment, entities of multiple sub-layers of the control plane in Figure 3 form an SRB in the vertical direction.

As an embodiment, entities of multiple sub-layers of the user plane in Figure 3 form a DRB in the vertical direction.

As an embodiment, entities of multiple sub-layers of the user plane in Figure 3 form an MRB in the vertical direction.

As an embodiment, the wireless protocol architecture in Figure 3 is applicable to the first node in this application.

As an embodiment, the wireless protocol architecture in Figure 3 is applicable to the second node in this application.

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

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

As an embodiment, the first sub-message in this application is generated in the RRC306.

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

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

As an embodiment, the L2 layer 305 or 355 belongs to a higher layer.

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

Example 4

Embodiment 4 illustrates a schematic diagram of a hardware module of a communication device according to an embodiment of the present application, as shown in FIG. 4 . Figure 4 is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in the 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 antenna 452.

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

In transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper layer data packets from the core network or upper layer data packets from the data source 477 are provided to Controller/Processor 475. Core network and data sources 477 represent all protocol layers above the L2 layer. Controller/processor 475 implements the functionality of the L2 layer. In transmission from the second communications device 410 to the first communications device 450, the controller/processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels Multiplexing, 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 communications device 450 . Transmit processor 416 and multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (ie, physical layer). Transmit processor 416 implements encoding and interleaving to facilitate forward error correction (FEC) at the second communications device 410, as well as based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift Mapping of signal clusters for M-phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The multi-antenna transmit processor 471 performs digital spatial precoding on the coded and modulated symbols, including codebook-based precoding and non-codebook-based precoding, and beamforming processing to generate one or more spatial streams. Transmit processor 416 then maps each spatial stream to a subcarrier, multiplexes it with a reference signal (eg, a pilot) in the time and/or frequency domain, and then uses an inverse fast Fourier transform (IFFT) to generate A physical channel carrying a stream of time-domain multi-carrier symbols. Then the multi-antenna transmit processor 471 performs transmit analog precoding/beamforming operations on the time domain multi-carrier symbol stream. Each transmitter 418 converts the baseband multi-carrier symbol stream provided by the multi-antenna transmit processor 471 into a radio frequency stream, which is then provided to a different antenna 420.

In transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each Receiver 454 receives the signal via its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier and converts the radio frequency stream into a baseband multi-carrier 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 of the L1 layer. Multi-antenna receive processor 458 performs receive analog precoding/beamforming operations on the baseband multi-carrier symbol stream from receiver 454. The receive processor 456 converts the baseband multi-carrier symbol stream after the received 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 receiving processor 456, where the reference signal will be used for channel estimation, and the data signal is recovered after multi-antenna detection in the multi-antenna receiving processor 458. The first communication device 450 is any spatial stream that is the destination. The symbols on each spatial stream are demodulated and recovered in the receive processor 456, and soft decisions are generated. The receive processor 456 then decodes and deinterleaves the soft decisions to recover upper layer data and control signals transmitted by the second communications device 410 on the physical channel. Upper layer data and control signals are then provided to controller/processor 459. Controller/processor 459 implements the functions of the L2 layer. Controller/processor 459 may be associated with memory 460 which stores program code and data. Memory 460 may be referred to as computer-readable media. In 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 transmission from the first communications device 450 to the second communications device 410, upper layer data packets are provided at the first communications device 450 to a controller/processor 459 using a data source 467. Data source 467 represents all protocol layers above the L2 layer. Similar to the transmit functionality at the second communications device 410 as described in transmission from the second communications device 410 to the first communications device 450, the controller/processor 459 implements header compression, encryption, packet Segmentation and reordering and multiplexing between logical and transport channels implement L2 layer functions for the user plane and control plane. The controller/processor 459 is also responsible for retransmission of lost packets, and signaling to the second communications device 410 . The transmit processor 468 performs modulation mapping and channel coding processing, and the multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based precoding and non-codebook-based precoding, and beam forming processing, and then transmits The processor 468 modulates the generated spatial stream into a multi-carrier/single-carrier symbol stream, which undergoes analog precoding/beamforming operations in the multi-antenna transmit processor 457 and then is provided to different antennas 452 via the transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by the multi-antenna transmission processor 457 into a radio frequency symbol stream, and then provides it to the antenna 452.

In the transmission from the first communication device 450 to the second communication device 410, the functionality at the second communication device 410 is similar to that in the transmission from the second communication device 410 to the first communication device 450. The reception function at the first communication device 450 is described in the transmission. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals into baseband signals, and provides the baseband signals to multi-antenna receive processor 472 and receive processor 470. The receiving processor 470 and the multi-antenna receiving processor 472 jointly implement the functions of the L1 layer. Controller/processor 475 implements L2 layer functions. Controller/processor 475 may be associated with memory 476 that stores program code and data. Memory 476 may be referred to as computer-readable media. In transmission from the first communications device 450 to the second communications 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 the core network or all protocol layers above the 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 device includes: at least one processor and at least one memory, the at least one memory includes computer program code; the at least one memory and the computer program code are configured to interact with the Using the at least one processor together, the first communication device 450 at least: receives a first paging message, the first paging message indicates the first node; and determines the first set of conditions according to whether the first set of conditions is satisfied. sub-message; in response to receiving the first paging message, sending a first message, the first message including the first sub-message; wherein the first paging message indicates that the first radio bearer set is in the RRC The inactive state performs data transmission; the behavior determines the first sub-message according to whether the first condition set is satisfied: when all conditions in the first condition set are satisfied, the first sub-message belongs to the first Candidate message set; when any condition in the first condition set is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes the first sub-message that does not belong to the first radio bearer Pending uplink data for radio bearers outside the set.

As an embodiment, the first communication device 450 device includes: a memory that stores a program of computer-readable instructions that, when executed by at least one processor, generates actions, and the actions include: receiving a first paging message, the first paging message indicating the first node; determining a first sub-message according to whether a first set of conditions is satisfied; and in response to receiving the first paging message, sending the first message , the first message includes the first sub-message; wherein the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state; the behavior is determined based on whether the first condition set is satisfied The first sub-message includes: when When all conditions in the first condition set are met, the first sub-message belongs to the first candidate message set; when any condition in the first condition set is not met, the first sub-message Belonging to the second candidate message set; the first condition set at least includes pending uplink data that does not belong to radio bearers outside the first radio bearer set.

As an embodiment, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory includes computer program code; the at least one memory and the computer program code are configured to interact with the used with at least one of the above processors. The second communication device 410 at least: sends a first paging message indicating the first node; in response to sending the first paging message, receives a first message, the The first message includes a first sub-message; wherein whether the first condition set is satisfied is used to determine the first sub-message; the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state ; Whether the first condition set is satisfied is used to determine the first sub-message including: when all conditions in the first condition set are satisfied, the first sub-message belongs to the first candidate message set ; When any condition in the first set of conditions is not satisfied, the first sub-message belongs to the second candidate message set; the first set of conditions at least includes those not belonging to the first radio bearer set The pending uplink data of the wireless bearer.

As an embodiment, the second communication device 410 device includes: a memory that stores a program of computer-readable instructions that, when executed by at least one processor, generates actions, and the actions include: sending a first paging message, the first paging message indicating the first node; in response to sending the first paging message, receiving a first message, the first message including a first sub-message; wherein, Whether the first set of conditions is met is used to determine the first sub-message; the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state; whether the first set of conditions is met is used to determine Determining the first sub-message includes: when all conditions in the first condition set are met, the first sub-message belongs to the first candidate message set; when any condition in the first condition set When a condition is not met, the first sub-message belongs to the second candidate message set; the first condition set at least includes pending uplink data that does not belong to radio bearers other than the first radio bearer set. .

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

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

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

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

As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller/processor 475 is used to transmit this The first paging message in the application.

As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456 or the controller/processor 459 is used to receive this The first paging message in the application.

As an embodiment, 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 this First news in application.

As an embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470 or the controller/processor 475 is used to receive this First news in application.

As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller/processor 475 is used to transmit this Second message in application.

As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456 or the controller/processor 459 is used to receive this Second message in application.

As an embodiment, at least one of the antenna 420, the transmitter 418, the multi-antenna transmit processor 471, the transmit processor 416 or the controller/processor 475 is used to transmit this Third message in application.

As an embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456 or the controller/processor 459 is used to receive this Third message in application.

Example 5

Embodiment 5 illustrates a wireless signal transmission flow chart according to an embodiment of the present application, as shown in FIG. 5 . In Figure 5, the first node N51 and the second node N52 communicate through a wireless interface. It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in this application.

For the first node N51 , receive the third message in step S511; enter or maintain the RRC inactive state in step S512; In step S513, the first paging message is received; in step S514, the first sub-message is determined; in step S515, the first message is sent; and in step S516, all radio bearers in the first radio bearer set are restored.

For the second node N52 , the third message is sent in step S521; the first paging message is sent in step S522; and the first message is received in step S523.

In Embodiment 5, the first paging message is received, and the first paging message indicates the first node; the first sub-message is determined according to whether the first set of conditions is satisfied; as the first paging message is received In response, send a first message, where the first message includes the first sub-message; wherein the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state; the behavior is based on the first Determining whether a set of conditions is satisfied for the first sub-message includes: when all conditions in the first set of conditions are met, the first sub-message belongs to the first set of candidate messages; when all conditions in the set of first conditions are met; When any condition of is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes pending messages that do not belong to radio bearers other than the first radio bearer set. Uplink data; the first message belongs to the SDT process or the first random access process; wherein all conditions in the first set of conditions are met; the air interface occupied by the PRACH included in the first random access process Resources are reserved for non-SDT-triggered random access procedures; with sending the first message, all radio bearers in the first radio bearer set are restored; radio bearers outside the first radio bearer set are not Configure to perform data transmission in the RRC inactive state, or the radio bearers outside the first radio bearer set have not yet been established; receive a third message before receiving the first paging message, the third message is used to indicate entering or maintaining the RRC inactive state; wherein the third message indicates the first radio bearer set.

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

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

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

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

As an embodiment, a third message is received before receiving the first paging message, and the third message is used to indicate entering or maintaining the RRC inactive state.

As an embodiment, the first receiver, in response to receiving the third message, enters or maintains the RRC inactive state.

As an embodiment, the third message includes the first identifier.

As an embodiment, the first identifier is used to identify the first node in the RRC inactive state.

As an embodiment, when the first node is in the RRC connected state when receiving the third message, it enters the RRC inactive state in response to receiving the third message.

As an embodiment, when the first node is in the RRC inactive state when receiving the third message, in response to receiving the third message, the RRC inactive state is maintained.

As an embodiment, the third message is high-layer signaling.

As an embodiment, the third message is RRC signaling.

As an embodiment, the third message is carried in all or part of the IE (Information element) in the RRC signaling.

As an embodiment, the third message is carried in all or part of a field in an IE in RRC signaling.

As an example, the third message is RRCRelease (RRC release).

As an embodiment, the third message includes suspend configuration (suspendConfig).

As an embodiment, the third message includes SDT configuration (sdt-Config).

As an embodiment, the third message includes a mobile-terminated small data transmission configuration (mt-sdt-Config).

As an embodiment, the third message includes downlink small data transmission configuration (dl-sdt-Config).

As an embodiment, the third message indicates the first radio bearer set.

As an embodiment, the third message includes radio bearer identities of all radio bearers in the first radio bearer set.

As an embodiment, the third message configures data transmission of all radio bearers in the first radio bearer set in the RRC inactive state.

As an embodiment, the behavior of entering or maintaining the RRC inactive state includes: suspending the second radio bearer set combine.

As an embodiment, the second radio bearer set includes all radio bearers established by the first node.

As an embodiment, the first radio bearer set is a subset of the second radio bearer set.

As an embodiment, when a radio bearer is suspended, the radio bearer is not used for data transmission.

As an embodiment, when a radio bearer is suspended, the radio bearer identity of the radio bearer is not released.

As an embodiment, the behavior of entering or maintaining the RRC inactive state includes: indicating PDCP (Packet Data Convergence Protocol, Packet Data Convergence Protocol) to the lower layer of all radio bearers in the second radio bearer set. ) hangs.

As an example, the behavior of entering or maintaining the RRC inactive state includes: re-establishing the RLC (Radio Link Control) entity of SRB1 (Signaling Radio Bearer, Signaling Radio Bearer 1) .

As an embodiment, the behavior of entering or maintaining the RRC inactive state includes: re-establishing RLC entities of all radio bearers in the second radio bearer set.

As an embodiment, the behavior of entering or maintaining the RRC inactive state includes: resetting MAC and if there is a default MAC Cell Group configuration (MAC Cell Group configuration), releasing the default MAC Cell Group configuration. .

As an embodiment, the behavior of entering or maintaining the RRC inactive state includes: instructing an upper layer (upper layer) to suspend the RRC connection.

As an embodiment, the behavior of entering or maintaining the RRC inactive state includes: performing cell selection (cell selection).

As an embodiment, the first radio bearer set includes signaling radio bearer (SRB).

As an embodiment, the first radio bearer set does not include signaling radio bearer 1 (SRB1).

As an embodiment, the first radio bearer set includes signaling radio bearer 2 (SRB2).

As an embodiment, the first radio bearer set includes signaling radio bearer 3 (SRB3).

As an embodiment, the first radio bearer set includes data radio bearer (DRB).

As an embodiment, the first radio bearer set includes MBS radio bearers.

As an embodiment, any radio bearer in the first radio bearer set is configured for SDT transmission.

As an embodiment, any radio bearer in the first radio bearer set is configured for downlink triggered SDT transmission.

As an embodiment, any radio bearer in the first radio bearer set is used for data transmission in at least RRC inactive state.

As an embodiment, any radio bearer in the first radio bearer set is configured for data transmission in the RRC connected state.

As an embodiment, when all conditions in the first condition set are satisfied, the first message belongs to one of the SDT process or the first random access process.

As an embodiment, the first transmitter, in response to receiving the first paging message, performs an SDT process, and the behavior of performing the SDT process includes sending the first message; wherein the first set of conditions All conditions in are met.

As an embodiment, the SDT process includes a RA-SDT process or a CG-SDT process.

As an embodiment, when the SDT process is the RA-SDT process, executing the SDT process includes executing a random access process, executing the random access process includes sending a PRACH, and the air interface resources occupied by the PRACH are Reserved for the random access process triggered by SDT.

As a sub-embodiment of the above embodiment, the first message is carried in Msg3 (Message 3) of the random access process included in the SDT process; wherein the random access process is 4 steps (4- step) random access process.

As a sub-embodiment of the above embodiment, the first message is carried in MsgA (Message A) of the random access process included in the SDT process; wherein the random access process is 2 steps (4- step) random access process.

As an embodiment, when the SDT process is the CG-SDT process, executing the SDT process includes executing configuration grant type 1.

As a sub-embodiment of the above embodiment, the air interface resource occupied by the first message is a configured uplink grant.

As a sub-embodiment of the above embodiment, the first message is the first transmission (initial transmission) of the SDT process.

As an embodiment, the air interface resources occupied by the PRACH included in the first random access process are reserved for non-SDT triggered random access processes.

As an embodiment, the first transmitter, in response to receiving the first paging message, performs a first random access process, and the behavior of performing the first random access process includes sending the first message; Wherein, all conditions in the first condition set are satisfied.

As an embodiment, the behavior of performing the first random access process includes sending a PRACH, and the air interface resources occupied by the PRACH are reserved for non-SDT triggered random access processes.

As an embodiment, the first message is carried in Msg3 (Message 3) of the first random access process; wherein the first random access process is 4-step random access. process.

As an embodiment, the first message is carried in MsgA (Message A) of the first random access process; wherein the first random access process is 2-step random access. process.

As an embodiment, the SDT process is used to determine the SDT process to perform downlink triggering.

As an embodiment, the air interface resources occupied by the PRACH included in the first random access process and the first sub-message are jointly used to determine the execution of the downlink triggered SDT process.

As a sub-embodiment of the above two embodiments, the first sub-message belongs to the first candidate message set.

As an embodiment, the air interface resources include at least one of time domain resources, frequency domain resources, code domain resources or air domain resources.

As an embodiment, the uplink data to be processed arrives after receiving the first paging message and before initiating the SDT process.

As an embodiment, the uplink data to be processed arrives after receiving the first paging message and before initiating the first random access procedure.

As an embodiment, the non-SDT triggered random access process includes a random access process triggered from an RRC connection recovery process in an RRC inactive state.

As an embodiment, the non-SDT triggered random access process includes a random access process triggered from initial access (initial access) in RRC idle (RRC_IDLE) state.

As an embodiment, the non-SDT triggered random access process includes a random access process triggered by requesting other system information (System Information, SI).

As an embodiment, when all conditions in the first set of conditions are met, the first message is sent and all radio bearers in the first set of radio bearers are restored.

As an embodiment, when all conditions in the first set of conditions are met, along with sending the first message, suspended radio bearers outside the first set of radio bearers are not restored.

As an embodiment, the behavior is accompanied by sending the first message, and restoring all radio bearers in the first radio bearer set includes: the behavior restoring all radio bearers in the first radio bearer set and the Related to the sending of the first message.

As an embodiment, the behavior is accompanied by sending the first message, and restoring all radio bearers in the first radio bearer set includes: restoring all radio bearers in the first radio bearer set and sending the first Messages are indivisible (atomic).

As an embodiment, the behavior is accompanied by sending the first message, and restoring all radio bearers in the first radio bearer set includes: sending the first message and restoring all radio bearers in the first radio bearer set. Carrying goes hand in hand.

As an embodiment, the behavior is accompanied by sending the first message, and restoring all radio bearers in the first radio bearer set includes: sending the first message is used to restore all radio bearers in the first radio bearer set. All wireless bearers.

As an embodiment, the behavior is accompanied by sending the first message, and restoring all radio bearers in the first radio bearer set includes: upon sending the first message (Upon transmission of the first message), restoring the All radio bearers in the first radio bearer set.

As an embodiment, the behavior is accompanied by sending the first message, and restoring all radio bearers in the first radio bearer set includes: following the transmission of the first message (Following the transmission of the first message), restoring All radio bearers in the first radio bearer set.

As an embodiment, the behavior is accompanied by sending the first message, and restoring all radio bearers in the first radio bearer set includes: following the restoration of all radio bearers in the first radio bearer set, sending the First news.

As an embodiment, the behavior of restoring all radio bearers in the first radio bearer set includes: for each radio bearer included in the first radio bearer set, from UE Inactive AS (user equipment inactive access Restore the configuration associated with the RLC bearer of the master cell group (masterCellGroup) and pdcp-Config (packet data convergence protocol configuration) in the context of the layer).

As an embodiment, the behavior of restoring all radio bearers in the first radio bearer set includes: targeting the first radio bearer For each radio bearer included in the bearer set, the PDCP entity is re-established.

As an embodiment, the behavior of restoring all radio bearers in the first radio bearer set includes: for each radio bearer included in the first radio bearer set, when PDCP status reporting (status reporting) is not triggered, In this case, the PDCP entity is reestablished for the radio bearer.

transmission.

As an embodiment, radio bearers outside the first radio bearer set are only configured to perform data transmission in the RRC connected state.

As an embodiment, radio bearers outside the first radio bearer set are not configured for the SDT process.

As an embodiment, radio bearers outside the first radio bearer set are not configured for the downlink SDT process.

As an embodiment, radio bearers outside the first radio bearer set have not yet been established.

As an embodiment, when the uplink data to be processed does not belong to any suspended radio bearer, the radio bearer used to transmit the uplink data to be processed has not yet been established.

As an embodiment, when all conditions in the first condition set are satisfied, after the initial access of the SDT process is successful or after the first random access process is successfully completed, the first node Continue to maintain the RRC inactive state.

As an embodiment, when all conditions in the first condition set are satisfied, after the initial access of the SDT process is successful or after the first random access process is successfully completed, the first node Not instructed to restore RRC connection.

As an embodiment, in the RRC inactive state, the first receiver receives a first MAC SDU (Service Data Unit), and the first MAC SDU belongs to the first radio bearer set. of a wireless bearer.

As an embodiment, the first receiver receives a fourth message, and the fourth message belongs to the RA-SDT process or the first random access process.

As an embodiment, the fourth message is used to indicate that the first random access process is successfully completed, or the fourth message is used to indicate that the initial access of the RA-SDT process is successful.

As a sub-embodiment of the above embodiment, the fourth message is Msg4 (Message 4) in the 4-step random access process.

As a sub-embodiment of the above embodiment, the fourth message is MsgB (Message B) in the 2-step random access process.

As a sub-embodiment of the above embodiment, the fourth message is UE Contention Resolution Identity (contention resolution identification) MAC CE.

As a sub-embodiment of the above embodiment, the fourth message is successRAR (successful random access response).

As an embodiment, the first receiver receives a fifth message, and the fifth message belongs to the CG-SDT process.

As an embodiment, the fifth message is used to indicate that the initial access of the CG-SDT process is successful.

As a sub-embodiment of the above embodiment, the fifth message is the first downlink assignment (downlink assignment) after the first message is sent.

As a sub-embodiment of the above embodiment, the fifth message is DCI (Downlink Control Information).

Example 6

Embodiment 6 illustrates another wireless signal transmission flow chart according to an embodiment of the present application, as shown in FIG. 6 . In Figure 6, the first node N61 and the second node N62 communicate through a wireless interface. It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in this application.

For the first node N61 , receive the third message in step S611; enter or maintain the RRC inactive state in step S612; receive the first paging message in step S613; restore the first radio bearer set in step S614. All radio bearers; determine the first sub-message in step S615; send the first message in step S616.

For the second node N62 , the third message is sent in step S621; the first paging message is sent in step S622; and the first message is received in step S623.

In Embodiment 6, the first paging message is received, and the first paging message indicates the first node; the first sub-message is determined according to whether the first set of conditions is satisfied; as the first paging message is received In response, send a first message, where the first message includes the first sub-message; wherein the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state; the behavior is based on the first The first sub-message for determining whether a condition set is satisfied includes: when all conditions in the first condition set are satisfied, the first The sub-message belongs to the first candidate message set; when any condition in the first condition set is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes Pending uplink data of radio bearers outside the first radio bearer set; the first message belongs to the SDT process or the first random access process; wherein all conditions in the first condition set are Satisfy: The air interface resources occupied by the PRACH included in the first random access process are reserved for non-SDT triggered random access processes; in response to receiving the first paging message, the first radio bearer is restored All radio bearers in the set; radio bearers outside the first radio bearer set are not configured to perform data transmission in the RRC inactive state, or radio bearers outside the first radio bearer set have not yet been established. ; Receive a third message before receiving the first paging message, the third message being used to indicate entering or maintaining the RRC inactive state; wherein the third message indicates the first radio bearer set .

As an embodiment, when all conditions in the first condition set are satisfied, in response to receiving the first paging message, all radio bearers in the first radio bearer set are restored.

Different from Embodiment 5, the first paging message is used to trigger the restoration of all radio bearers in the first radio bearer set.

The recovery time of all radio bearers in the first radio bearer set described in Embodiment 6 is no later than the recovery time of all radio bearers in the first radio bearer set described in Embodiment 5.

Example 7

Embodiment 7 illustrates a third wireless signal transmission flow chart according to an embodiment of the present application, as shown in FIG. 7 . In Figure 7, the first node N71 and the second node N72 communicate through a wireless interface. It is particularly noted that the order in this example does not limit the signal transmission order and implementation order in this application.

For the first node N71 , receive the third message in step S711; enter or maintain the RRC inactive state in step S712; receive the first paging message in step S713; determine the first sub-message in step S714; In step S715, the first message is sent; in step S716, the second message is received; in step S717, all radio bearers in the first radio bearer set are restored.

For the second node N72 , the third message is sent in step S721; the first paging message is sent in step S722; the first message is received in step S723; and the second message is sent in step S724.

In Embodiment 7, the first paging message is received, and the first paging message indicates the first node; the first sub-message is determined according to whether the first set of conditions is satisfied; as the method for receiving the first paging message In response, send a first message, where the first message includes the first sub-message; wherein the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state; the behavior is based on the first Determining whether the condition set is satisfied for the first sub-message includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to the first candidate message set; when all conditions in the first condition set are satisfied When any condition is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes pending uplinks that do not belong to radio bearers other than the first radio bearer set. Data; receiving a second message, the second message being a response to the first message, the second message being used to restore at least all radio bearers in the first radio bearer set; wherein, the third A message belongs to the second random access process, and the air interface resources occupied by the PRACH included in the second random access process are reserved for non-SDT-triggered random access processes; any condition in the first set of conditions is not satisfied; the radio bearers outside the first radio bearer set are not configured to perform data transmission in the RRC inactive state, or the radio bearers outside the first radio bearer set have not been established; when receiving A third message is received before the first paging message, and the third message is used to indicate entering or maintaining the RRC inactive state; wherein the third message indicates the first radio bearer set.

As an embodiment, when any condition in the first set of conditions is not satisfied, along with sending the first message, all radio bearers in the first set of radio bearers are not restored.

As an embodiment, receiving a second message, the second message being a response to the first message, the second message being used to restore at least all radio bearers in the first radio bearer set; wherein, Any condition in the first set of conditions is not satisfied.

As an embodiment, the first message belongs to the second random access process, and the air interface resources occupied by the PRACH included in the second random access process are reserved for non-SDT-triggered random access processes.

As an embodiment, the first message is carried in Msg3 (Message 3) of the second random access process; wherein the second random access process is 4-step random access. process.

As an embodiment, the first message is carried in MsgA (Message A) of the second random access process; wherein the second random access process is 2-step random access. process.

As an embodiment, the first transmitter, in response to receiving the first paging message, performs a second random access procedure, and the act of performing the second random access procedure includes sending the first message.

As an embodiment, the behavior of performing the second random access process includes sending a PRACH, and the air interface resources occupied by the PRACH are reserved for non-SDT-triggered random access processes.

As an embodiment, the second message is received after the second random access procedure is successfully completed.

As an embodiment, the second message is RRC signaling.

As an embodiment, the second message is carried in all or part of IE (Information element) in RRC signaling.

As an embodiment, the second message is carried in all or part of a field in an IE in RRC signaling.

As an example, the second message is RRCResume (RRC recovery)

As an embodiment, the second message is used to indicate resumption of the RRC connection.

As an embodiment, the first receiver enters the RRC connection state in response to receiving the second message.

As an embodiment, the second message is used to restore at least all radio bearers in the first radio bearer set.

As an embodiment, the second message is used to restore all radio bearers in the first radio bearer set.

As an embodiment, the second message is used to resume all suspended radio bearers outside the first radio bearer set.

As an embodiment, the second message is used to resume all suspended radio bearers.

As an embodiment, the second message is used to discard the inactive AS (Access Stratum, access layer) context of the first node.

As an embodiment, the second message is used to release the suspendConfig (suspend configuration) of the first node.

As an embodiment, the air interface resources occupied by the PRACH included in the second random access process and the first sub-message are jointly used to determine the transition from the RRC inactive state to the RRC connected state.

As a sub-embodiment of the above embodiment, the first sub-message belongs to the second candidate message set.

As an embodiment, the uplink data to be processed arrives after receiving the first paging message and before initiating the second random access procedure.

Example 8

Embodiment 8 illustrates a schematic format diagram of the first paging message according to an embodiment of the present application, as shown in FIG. 8 .

As an embodiment, the first paging message includes a paging record (PagingRecord), and the paging record includes the first identifier and the paging reason for paging the first node.

As an embodiment, the first paging message includes a paging group (PagingGroup), and the paging group includes the second identification and the paging reason.

As an embodiment, the paging cause is MT-SDT.

As an embodiment, the paging cause is SDT.

In case A of Embodiment 8, the first paging message includes a PagingRecord (paging record), the PagingRecord includes a ue-Identity (user equipment identification) field and a PagingCause (paging cause) field, and the ue- The Identity field is used to indicate the first node, and the PagingCause is used to indicate that the paging reason for sending the first paging message is downlink triggered SDT; wherein, the PagingUE-Identity (Paging User Equipment Identity) ) is the first identifier.

In case B of Embodiment 8, the first paging message includes a PagingGroup (paging group), the PagingGroup includes a TMGI-Identity (TMGI identification) field and a PagingCause field, and the TMGI-Identity field is used to indicate The first node has joined one or more MBS sessions indicated by the TMGI, and the PagingCause is used to indicate that the paging reason for sending the first paging message is a downlink-triggered SDT.

Example 9

Embodiment 9 illustrates a schematic format diagram of the first message according to an embodiment of the present application, as shown in FIG. 9 .

In Embodiment 9, the first message is an RRCResumeRequest (RRC recovery request) information element, and the first message includes resumeIdentity (resume identification) field, resumeMAC-I (resume MAC-I) field, resumeCause (resume reason) field and spare (idle) field; wherein, the resumeIdentity field is used to indicate the first node; the resumeMAC -The I domain includes an authentication token, which is used to authenticate the UE, that is, the first node, at the second node; the resumeCause field includes the first sub-message , the first sub-message is used to indicate the reason for the RRC recovery request; the spare field is used to satisfy that the RRCResumeRequest information element includes 2 positive integer bits.

Example 10

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

In Embodiment 10, the first receiver 1001 receives a first paging message, and the first paging message indicates the first node; the first transmitter 1002 determines the first condition according to whether the first condition set is satisfied. sub-message; in response to receiving the first paging message, sending a first message, the first message including the first sub-message; wherein the first paging message indicates that the first radio bearer set is in the RRC The inactive state performs data transmission; the behavior determines the first sub-message according to whether the first condition set is satisfied: when all conditions in the first condition set are satisfied, the first sub-message belongs to the first Candidate message set; when any condition in the first condition set is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes the first sub-message that does not belong to the first radio bearer Pending uplink data for radio bearers outside the set.

As an embodiment, the first message belongs to one of the SDT process or the first random access process; wherein all conditions in the first condition set are satisfied; the first random access process includes The air interface resources occupied by PRACH are reserved for non-SDT triggered random access processes.

As an embodiment, the first message belongs to one of the SDT process or the first random access process; wherein all conditions in the first condition set are satisfied; the first random access process includes The air interface resources occupied by the PRACH are reserved for non-SDT triggered random access processes; the first transmitter 1002, along with sending the first message, restores all radio bearers in the first radio bearer set.

As an embodiment, the first message belongs to one of the SDT process or the first random access process; wherein all conditions in the first condition set are satisfied; the first random access process includes The air interface resources occupied by the PRACH are reserved for non-SDT triggered random access processes; the first transmitter 1002, in response to receiving the first paging message, restores the first radio bearer set All wireless bearers.

As an embodiment, the first receiver 1001 receives a second message, the second message is a response to the first message, and the second message is used to restore at least the first radio bearer set. All radio bearers in; wherein the first message belongs to the second random access process, and the air interface resources occupied by the PRACH included in the second random access process are reserved for non-SDT triggered random access processes; Any condition in the first set of conditions is not satisfied.

As an embodiment, the radio bearers outside the first radio bearer set are not configured to perform data transmission in the RRC inactive state, or the radio bearers outside the first radio bearer set have not been established yet.

As an embodiment, the first receiver 1001 receives a third message before receiving the first paging message, and the third message is used to indicate entering or maintaining the RRC inactive state; wherein, The third message indicates the first radio bearer set.

As an embodiment, the first receiver 1001 includes the receiver 454 (including the antenna 452), the receiving processor 456, the multi-antenna receiving processor 458 and the controller/processor 459 in Figure 4 of this application.

As an embodiment, the first receiver 1001 includes at least one of the receiver 454 (including the antenna 452), the receiving processor 456, the multi-antenna receiving processor 458 or the controller/processor 459 in Figure 4 of this application. one.

As an embodiment, the first receiver 1001 includes the controller/processor 459 in Figure 4 of this application.

As an embodiment, the first transmitter 1002 includes the transmitter 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457 and the controller/processor 459 in Figure 4 of this application.

As an embodiment, the first transmitter 1002 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 in Figure 4 of this application. one.

As an embodiment, the first transmitter 1002 includes the controller/processor 459 in Figure 4 of this application.

Example 11

Embodiment 11 illustrates a structural block diagram of the processing device in the second node according to an embodiment of the present application, as shown in Figure 11. In Figure 11, the second node processing device 1100 includes a second receiver 1101 and a second transmitter 1102; the second node 1100 is a base station.

In Embodiment 11, the second transmitter 1102 sends a first paging message indicating the first node; the second receiver 1101 sends a response to the first paging message. , receiving a first message, the first message including a first sub-message; wherein whether the first condition set is satisfied is used to determine the first sub-message; the first paging message indicates a first radio bearer set Data transmission is performed in the RRC inactive state; whether the first condition set is satisfied is used to determine the first sub-message including: when all conditions in the first condition set are satisfied, the first The sub-message belongs to the first candidate message set; when any condition in the first condition set is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes Pending uplink data of radio bearers outside the first radio bearer set.

As an embodiment, the first message belongs to one of the SDT process or the first random access process; wherein all conditions in the first condition set are satisfied; the first random access process includes The air interface resources occupied by the PRACH are reserved for non-SDT-triggered random access processes; as the first message is sent, all radio bearers in the first radio bearer set are restored.

As an embodiment, the first message belongs to one of the SDT process or the first random access process; wherein all conditions in the first condition set are satisfied; the first random access process includes The air interface resources occupied by the PRACH are reserved for non-SDT triggered random access processes; as a response to the first paging message being received, all radio bearers in the first radio bearer set are restored.

As an embodiment, the second transmitter 1102, in response to receiving the first message, sends a second message, the second message being used to restore at least all radio bearers in the first radio bearer set. ; Wherein, the first message belongs to the second random access process, and the air interface resources occupied by the PRACH included in the second random access process are reserved for non-SDT triggered random access processes; the first condition None of the conditions in the set are met.

As an embodiment, the second transmitter 1102 sends a third message before sending the first paging message, and the third message is used to indicate entering or maintaining the RRC inactive state; wherein, The third message indicates the first radio bearer set.

As an embodiment, the second receiver 1101 includes the receiver 418 (including the antenna 420), the receiving processor 470, the multi-antenna receiving processor 472 and the controller/processor 475 in Figure 4 of this application.

As an embodiment, the second receiver 1101 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 in Figure 4 of this application. one.

As an embodiment, the second transmitter 1102 includes the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471 and the controller/processor 475 in Figure 4 of this application.

As an embodiment, the second transmitter 1102 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 in Figure 4 of this application. one.

Those of ordinary skill in the art can understand that all or part of the steps in the above method can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a hard disk or an optical disk. Optionally, all or part of the steps of the above embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiments can be implemented in the form of hardware or in the form of software function modules. This application is not limited to any specific form of combination of software and hardware. The first type of communication node or UE or terminal in this application includes but is not limited to mobile phones, tablets, laptops, network cards, low-power devices, eMTC (enhanced Machine Type Communication) devices, and NB-IoT devices , vehicle-mounted communication equipment, aircraft, aircraft, drones, remote control aircraft and other wireless communication equipment. The second type of communication node or base station or network side equipment in this application includes but is not limited to macro cell base station, micro cell base station, home base station, relay base station, eNB, gNB, transmission and reception node TRP (Transmission and Reception Point, transmitting and receiving point), relay satellite, satellite base station, air base station and other wireless communication equipment.

The above descriptions are only preferred embodiments of the present application and are not intended to limit the protection scope of the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included in the protection scope of this application.

Claims

A first node used for wireless communication, characterized by including:

A first receiver receives a first paging message, the first paging message indicating the first node;

The first transmitter determines the first sub-message according to whether the first condition set is satisfied; in response to receiving the first paging message, sends a first message, the first message including the first sub-message;

Wherein, the first paging message instructs the first radio bearer set to perform data transmission in the RRC inactive state; the behavior is determined based on whether the first condition set is satisfied. The first sub-message includes: when the first condition set is When all conditions in the first condition set are met, the first sub-message belongs to the first candidate message set; when any condition in the first condition set is not met, the first sub-message belongs to the second candidate message set ; The first condition set at least includes pending uplink data that does not belong to radio bearers outside the first radio bearer set.
The first node according to claim 1, characterized in that the first message belongs to one of the SDT process or the first random access process;

Wherein, all conditions in the first condition set are satisfied; the air interface resources occupied by the PRACH included in the first random access process are reserved for non-SDT triggered random access processes.
The first node according to claim 2, characterized in that it includes:

The first transmitter, along with sending the first message, restores all radio bearers in the first radio bearer set.
The first node according to claim 2, characterized in that it includes:

The first transmitter, in response to receiving the first paging message, restores all radio bearers in the first radio bearer set.
The first node according to claim 1, characterized in that it includes:

The first receiver receives a second message, the second message is a response to the first message, and the second message is used to restore at least all radio bearers in the first radio bearer set;

Wherein, the first message belongs to the second random access process, and the air interface resources occupied by the PRACH included in the second random access process are reserved for non-SDT triggered random access processes; the first set of conditions None of the conditions are met.
The first node according to any one of claims 1 to 5, characterized in that radio bearers outside the first radio bearer set are not configured to perform data transmission in the RRC inactive state, or, Radio bearers outside the first radio bearer set have not yet been established.
The first node according to any one of claims 1 to 6, characterized in that it includes:

The first receiver receives a third message before receiving the first paging message, where the third message is used to indicate entering or maintaining the RRC inactive state;

Wherein, the third message indicates the first radio bearer set.
A second node used for wireless communication, characterized by including:

a second transmitter, sending a first paging message, the first paging message indicating the first node;

a second receiver, in response to sending the first paging message, receiving a first message, where the first message includes a first sub-message;

Wherein, whether the first condition set is satisfied is used to determine the first sub-message; the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state; whether the first condition set is satisfied Satisfaction is used to determine the first sub-message including: when all conditions in the first condition set are met, the first sub-message belongs to the first candidate message set; when in the first condition set When any condition of is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes pending messages that do not belong to radio bearers other than the first radio bearer set. Upstream data.
A method used in a first node of wireless communication, characterized by comprising:

receiving a first paging message, the first paging message indicating the first node;

Determine the first sub-message according to whether the first set of conditions is satisfied;

In response to receiving the first paging message, a first message is sent, the first message including the first sub- information;

Wherein, the first paging message instructs the first radio bearer set to perform data transmission in the RRC inactive state; the behavior is determined based on whether the first condition set is satisfied. The first sub-message includes: when the first condition set is When all conditions in the first condition set are met, the first sub-message belongs to the first candidate message set; when any condition in the first condition set is not met, the first sub-message belongs to the second candidate message set ; The first condition set at least includes pending uplink data that does not belong to radio bearers outside the first radio bearer set.
A method used in a second node for wireless communication, characterized by comprising:

Send a first paging message, the first paging message indicating the first node;

in response to sending the first paging message, receiving a first message, the first message including a first sub-message;

Wherein, whether the first condition set is satisfied is used to determine the first sub-message; the first paging message indicates that the first radio bearer set performs data transmission in the RRC inactive state; whether the first condition set is satisfied Satisfaction is used to determine the first sub-message including: when all conditions in the first condition set are met, the first sub-message belongs to the first candidate message set; when in the first condition set When any condition of is not satisfied, the first sub-message belongs to the second candidate message set; the first condition set at least includes pending messages that do not belong to radio bearers other than the first radio bearer set. Upstream data.