CN117098251A

CN117098251A - Method and apparatus for wireless communication

Info

Publication number: CN117098251A
Application number: CN202210522447.XA
Authority: CN
Inventors: 张锦芳; 张晓博
Original assignee: Shanghai Langbo Communication Technology Co Ltd
Current assignee: Shanghai Langbo Communication Technology Co Ltd
Priority date: 2022-05-13
Filing date: 2022-05-13
Publication date: 2023-11-21
Also published as: WO2023217076A1

Abstract

A method and apparatus for wireless communication are disclosed. The first node receives a first paging message; determining a first sub-message based on whether the first set of conditions is satisfied; transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message; wherein the first paging message indicates that the first set of radio bearers performs data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending uplink data for radio bearers not belonging to the first set of radio bearers. The application effectively supports the downlink triggering small data transmission.

Description

Method and apparatus for wireless communication

Technical Field

The present application relates to a method and apparatus in a wireless communication system, and more particularly, to a method and apparatus for supporting downlink triggered small data (DL-triggered small data) transmission in an RRC inactive state in wireless communication.

Background

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

The application scene of the future wireless communication system is more and more diversified, and along with the rapid development of the internet of things, the small data service is an important service in the future wireless communication. The small data service has the characteristics of small data volume and low transmission frequency, and the signaling cost of RRC state transition is larger than the transmission cost of the small data aiming at the small data transmission, and meanwhile, the power consumption cost of UE (User Equipment) is increased. Thus, the decision to initiate WI (Work Item) standardization Work for small data transmissions (small data transmission, SDT) triggered by uplink data in RRC inactive state is made at 3gpp ran#88e. The decision to initiate WI standardization work for small data transmission triggered by downlink data in RRC inactive state is made at 3gpp ran#94e.

Disclosure of Invention

The inventor finds that the UE is in an RRC inactive state through research, and when downlink small data arrives, the network instructs to initiate small data communication through paging the UE. The UE may have uplink non-small data arrival after receiving the paging message and before accessing the network, how the UE indicates to the network whether to communicate through SDT or to enter RRC connected state communication needs to be studied.

In view of the above problems, the present application discloses a solution for supporting downlink triggered small data transmission in an RRC inactive state, after receiving a paging message to instruct a UE to maintain in the RRC inactive state to perform small data transmission, the UE indicates to a network according to whether there is uplink data, so that the network and the UE can achieve the same understanding, and the beneficial effect of saving signaling overhead can be obtained, and flexibly support data transmission in SDT and RRC connected states. Embodiments in a first node of the application and features in embodiments may be applied to a second node and vice versa without conflict. The embodiments of the application and the features of the embodiments may be combined with each other arbitrarily without conflict. Further, while the present application is initially directed to Uu air interfaces, the present application can also be used for PC5 interfaces. Further, although the present application is initially directed to a terminal and base station scenario, the present application is also applicable to a V2X (Vehicle-to-internet) scenario, a communication scenario between a terminal and a relay, and a communication scenario between a relay and a base station, and similar technical effects in the terminal and base station scenario are obtained. Furthermore, the adoption of a unified solution for different scenarios (including but not limited to V2X scenarios and communication scenarios of terminals with base stations) also helps to reduce hardware complexity and cost. In particular, the term (Terminology), noun, function, variable in the present application may be interpreted (if not specifically stated) with reference to the definitions in the 3GPP specification protocols TS36 series, TS38 series, TS37 series.

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

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

determining a first sub-message based on whether the first set of conditions is satisfied;

transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message;

wherein the first paging message indicates that the first set of radio bearers performs data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

As an embodiment, the method is applicable to downlink triggered small data transmission.

As an embodiment, the above method indicates, through the first paging message, that the radio bearers in the first radio bearer set perform data transmission in the RRC inactive state, so that signaling overhead introduced by RRC state transition can be reduced.

As an embodiment, the above method indicates, through the first paging message, that the radio bearers in the first radio bearer set perform data transmission in the RRC inactive state, so that access latency can be reduced.

As one embodiment, the conventional method sets the first sub-message according to the first paging message; the method further sets the first sub-message according to whether the first condition set is satisfied, so that the network and the UE can achieve the same understanding, and the recovery of the radio bearer other than the first radio bearer is quickened.

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

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

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

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

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

As one embodiment, in an RRC inactive state, radio bearers in the first set of radio bearers are restored during SDT; wherein the SDT procedure is triggered by downstream data or the SDT procedure is triggered by upstream data.

According to one aspect of the application, it comprises:

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

wherein all conditions in the first set of conditions are satisfied; and the air interface resources occupied by the PRACH included in the first random access process are reserved for a random access process triggered by non-SDT.

As an embodiment, the SDT procedure includes one of a RA (Random Access) -SDT procedure or a CG (Configured Grant) -SDT procedure.

As an embodiment, the RA-SDT procedure includes a PRACH (Physical Random Access CHannel ) that occupies air interface resources reserved for the SDT triggered random access procedure.

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

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

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

As an embodiment, when the PRACH resource included in the SDT procedure or the configured uplink grant resource is earlier in time domain than the PRACH resource included in the first random access procedure, the first message belongs to the SDT procedure; when the PRACH resource included in the SDT procedure or the configured uplink grant resource is later in time domain than the PRACH resource included in the first random access procedure, the first message belongs to the first random access procedure.

As an embodiment, the above method may reduce access latency.

According to one aspect of the application, it comprises:

and restoring all radio bearers in the first radio bearer set along with sending the first message.

According to one aspect of the application, it comprises:

and in response to receiving the first paging message, recovering all radio bearers in the first set of radio bearers.

As an embodiment, the above method may reduce access latency.

According to one aspect of the application, it comprises:

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

The first message belongs to a second random access process, and an air interface resource occupied by PRACH included in the second random access process is reserved for a random access process triggered by non-SDT; any condition of the first set of conditions is not satisfied.

As an embodiment, the method can be backward compatible with the prior art, which helps to reduce hardware complexity and cost.

According to one aspect of the application, it comprises:

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.

According to one aspect of the application, it comprises:

receiving a third message prior to 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 set of radio bearers.

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

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

receiving a first message as a response to transmitting the first paging message, the first message including a first sub-message;

Wherein whether a first set of conditions 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 an RRC inactive state; whether the first set of conditions is satisfied is used to determine the first sub-message includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

According to one aspect of the application, it comprises:

with the first message sent, all radio bearers in the first set of radio bearers are restored.

According to one aspect of the application, it comprises:

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, it comprises:

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

According to one aspect of the application, it comprises:

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

According to one aspect of the application, it comprises:

transmitting a third message prior to transmitting 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 set of radio bearers.

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

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

a first transmitter determining a first sub-message based on whether a first set of conditions is satisfied; transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message;

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

A second transmitter that transmits a first paging message, the first paging message indicating the first node;

a second receiver for receiving a first message as a response to transmitting the first paging message, the first message including a first sub-message;

Drawings

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

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

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

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

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

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

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

fig. 7 illustrates a third wireless signal transmission flow diagram according to one embodiment of the application;

fig. 8 illustrates a schematic format of a first paging message according to one embodiment of the present application;

FIG. 9 illustrates a schematic format of a first message according to one embodiment of the application;

FIG. 10 illustrates a block diagram of a processing arrangement in a first node according to one embodiment of the application;

fig. 11 illustrates a block diagram of a processing arrangement in a second node according to an embodiment of the application.

Detailed Description

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

Example 1

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

In embodiment 1, a first node 100 receives a first paging message in step 101, the first paging message indicating the first node; determining in step 102 whether the first sub-message is satisfied according to the first set of conditions; in step 103, as a response to receiving the first paging message, sending a first message, wherein the first message includes the first sub-message; wherein the first paging message indicates that a first set of radio bearers is used to perform data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

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

As one embodiment, the first paging message is received from an air interface, which 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 one embodiment, the phrase the first paging message indicates that the first node comprises: the first paging message includes a first identification, which is used to identify the first node.

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

As an embodiment, the first paging message is received in a paging occasion (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) paging message.

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

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

As an embodiment, the first identity is not allocated by an upper layer (upper layer).

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

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

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

As an embodiment, the first identity comprises a complete I-RNTI value.

As an embodiment, the first identification comprises 40 bits.

As an embodiment, the second identity is a TMGI (Temporary Mobile Group Identity ).

As one embodiment, the first paging message indicates that the first set of radio bearers perform data transmission in an RRC inactive state.

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

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

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

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

As one embodiment, any radio bearer in the first set of radio bearers is in a suspended state prior to receiving the first paging message.

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

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

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

As an embodiment, the first message is used to request a recovery of RRC connection.

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

As an embodiment, the first message is RRC signaling.

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

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

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

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

As an embodiment, the first message comprises at least part of the bits of the first identification; wherein the first identifier is an I-RNTI.

As an embodiment, the first message comprises the first identification.

As an embodiment, the first identity comprises 40 bits and the first message comprises 24 bits of the first identity.

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

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

As an embodiment, the first sub-message is resumevaue (restoration cause).

As one embodiment, the first sub-message is determined based on 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 set of conditions includes at least a condition that there is no pending uplink data belonging to a radio bearer other than the first set of radio bearers.

As an embodiment, the first set of conditions includes no pending uplink data belonging to the first set of radio bearers, or a condition that there is pending uplink data belonging to the first set of radio bearers and that a SDT procedure is triggered is satisfied.

As one embodiment, the condition triggering the SDT procedure is satisfied including satisfying 5 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 (mapped) to the radio bearer configured with the SDT; the lower layer indicates that the condition triggering the SDT is satisfied.

As an embodiment, the condition triggering the SDT procedure is satisfied including the condition in section 5.3.13 in 3GPP standard TS 38.331.

As one embodiment, the condition that the bottom layer indicates triggering the SDT is satisfied includes satisfying 2 conditions as follows: the data amount of the uplink data to be processed mapped to all radio bearers configured with SDT is not greater than a first threshold; the RSRP (Reference Signal ReceivedPower ) of the downlink loss reference (downlink pathloss reference) is above a second threshold.

As an embodiment, the condition that the bottom layer indicates triggering the SDT is satisfied includes satisfying the condition in section 5.27 in 3GPP standard TS 38.31.

As one embodiment, any one of the first set of radio bearers is configured with an SDT.

As an embodiment, all pending uplink data is mapped to radio bearers configured with SDT means: all pending uplink data is mapped to radio bearers in the first set of radio bearers.

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

As an embodiment, the first threshold is sdt-datavolumthreshold (small data transmission data amount 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 pending uplink data is not earlier than the reception of the first paging message.

As one embodiment, the act of determining the first sub-message based on whether the first set of conditions is satisfied comprises: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first set of conditions is not satisfied, the first sub-message belongs to a second set of candidate messages.

As an embodiment, the first set of conditions only includes pending uplink data without radio bearers belonging to outside the first set of radio bearers.

As a sub-embodiment of the above embodiment, when there is no uplink data to be processed belonging to a radio bearer other than the first radio bearer set, the first condition set is satisfied; when there is uplink data to be processed belonging to a radio bearer other than the first radio bearer set, the first condition set is not satisfied.

As an embodiment, the first set of conditions includes 2 conditions: one of the conditions is that there is no pending uplink data belonging to a radio bearer other than the first radio bearer set, and the other condition is that there is no pending uplink data belonging to the first radio bearer set, or that there is pending uplink data belonging to the first radio bearer set and a condition triggering an SDT procedure is satisfied.

As a sub-embodiment of the above embodiment, when there is no pending uplink data belonging to a radio bearer other than the first radio bearer set, while there is no pending uplink data belonging to the first radio bearer set, or there is pending uplink data belonging to the first radio bearer set and the condition triggering the SDT procedure is satisfied, all conditions of the first condition set are satisfied; when there is uplink data to be processed of a radio bearer other than the first radio bearer set, the first condition set is not satisfied, or when there is uplink data to be processed of the first radio bearer set and a condition triggering an SDT procedure is not satisfied, the first condition set is not satisfied.

As one embodiment, the first set of candidate messages is orthogonal to the second set of candidate messages.

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

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

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 the first radio bearer set and that the condition triggering the SDT procedure is not met.

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

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

As an embodiment, the first candidate message set includes at least highprioritaccess, mt-Access (mobile terminated Access), mps (Multimedia Priority Service ) -prioritaccess and mcs (Mission Critical Service, emergency service) -prioritaccess.

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

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

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

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

As an embodiment, when the first node is not accessed to the identifier 1, the identifier 2, or the identifiers 11-15 by the upper layer configuration value, the first sub-message is mt (Mobile Terminated, mobile end termination) -Access.

As an embodiment, the second candidate message set includes at least mo (Mobile Originated ) -signaling, mo-Data, mo-VoiceCall, mo-VideoCall, mo-SMS (Short Message Service ) and ra (RAN area,) -Update.

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

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

As an embodiment, when there is pending (pending) uplink signaling of a radio bearer belonging to the first set of radio bearers, the first sub-message is mo-signaling.

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

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

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

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

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

Example 2

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

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

As an embodiment, the NR node B203 corresponds to a second node in the present application.

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

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

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

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

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

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

As one embodiment, the gNB203 is a satellite device.

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

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

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

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

Example 3

Embodiment 3 illustrates a schematic diagram of a radio protocol architecture of a user plane and a control plane according to one embodiment of the present application, as shown in fig. 3. Fig. 3 is a schematic diagram illustrating an embodiment of a radio protocol architecture for a user plane 350 and a control plane 300, fig. 3 shows the radio protocol architecture of the control plane 300 for a UE and a gNB with three layers: layer 1, layer 2 and layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (physical layer) signal processing functions. The L1 layer will be referred to herein as PHY301. Layer 2 (L2 layer) 305 is above PHY301 and is responsible for the link between the UE and the gNB through PHY301. The L2 layer 305 includes a MAC (Medium Access Control ) sublayer 302, an RLC (Radio Link Control, radio link layer control protocol) sublayer 303, and a PDCP (Packet Data Convergence Protocol ) sublayer 304, which terminate at the gNB on the network side. The PDCP sublayer 304 provides data ciphering and integrity protection, and the PDCP sublayer 304 also provides handover support for UEs between gnbs. The RLC sublayer 303 provides segmentation and reassembly of data packets, retransmission of lost data packets by ARQ, and RLC sublayer 303 also provides duplicate data packet detection and protocol error detection. The MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. The MAC sublayer 302 is also responsible for allocating the various radio resources (e.g., resource blocks) in one cell among the UEs. The MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request ) operations. The RRC (Radio Resource Control ) sublayer 306 in layer 3 (L3 layer) in the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. Although not shown, a V2X layer may be further disposed above the RRC sublayer 306 in the control plane 300 of the UE, where the V2X layer is responsible for generating a PC5QoS parameter set and QoS rules according to received service data or service requests, generating a PC5QoS flow corresponding to the PC5QoS parameter set, and sending a PC5QoS flow identifier and a corresponding PC5QoS parameter set to an AS (Access Stratum) layer for QoS processing by the AS layer on a data packet belonging to the PC5QoS flow identifier; the V2X layer also includes a PC5-S signaling protocol (PC 5-Signaling Protocol) sub-layer, and the V2X layer is responsible for indicating whether each transmission by the AS layer is a PC5-S transmission or a V2X traffic data transmission. The radio protocol architecture of the user plane 350 includes layer 1 (L1 layer) and layer 2 (L2 layer), the radio protocol architecture in the user plane 350 is substantially the same for the physical layer 351, PDCP sublayer 354 in the L2 layer 355, RLC sublayer 353 in the L2 layer 355, and MAC sublayer 352 in the L2 layer 355 as the corresponding layers and sublayers in the control plane 300, but the PDCP sublayer 354 also provides header compression for upper layer data packets to reduce radio transmission overhead. Also included in the L2 layer 355 in the user plane 350 is an SDAP (Service Data Adaptation Protocol ) sublayer 356, the SDAP sublayer 356 being responsible for mapping between QoS (Quality of Service ) flows and data radio bearers (DRBs, data Radio Bearer) to support diversity of traffic. The radio protocol architecture of the UE in the user plane 350 may include some or all of the SDAP sublayer 356, pdcp sublayer 354, rlc sublayer 353 and MAC sublayer 352 at the L2 layer. Although not shown, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) that terminates at the P-GW on the network side and an application layer that terminates at the other end of the connection (e.g., remote UE, server, etc.).

As an example, the entities of the multiple sublayers of the control plane in fig. 3 constitute SRBs in the vertical direction.

As an example, the entities of the multiple sub-layers of the user plane in fig. 3 constitute DRBs in the vertical direction.

As an example, the entities of the multiple sub-layers of the user plane in fig. 3 constitute an MRB in the vertical direction.

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

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

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

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

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

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

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

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

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

Example 4

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

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

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

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

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

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

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

As an embodiment, the first communication device 450 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus of the first communication device 450 to at least: receiving a first paging message, the first paging message indicating the first node; determining a first sub-message based on whether the first set of conditions is satisfied; transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message; wherein the first paging message indicates that the first set of radio bearers performs data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

As an embodiment, the first communication device 450 apparatus includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: receiving a first paging message, the first paging message indicating the first node; determining a first sub-message based on whether the first set of conditions is satisfied; transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message; wherein the first paging message indicates that the first set of radio bearers performs data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

As an embodiment, the second communication device 410 apparatus includes: at least one processor and at least one memory including computer program code; the at least one memory and the computer program code are configured for use with the at least one processor. The second communication device 410 means at least: transmitting a first paging message, the first paging message indicating the first node; receiving a first message as a response to transmitting the first paging message, the first message including a first sub-message; wherein whether a first set of conditions 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 an RRC inactive state; whether the first set of conditions is satisfied is used to determine the first sub-message includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

As an embodiment, the second communication device 410 apparatus includes: a memory storing a program of computer-readable instructions that, when executed by at least one processor, produce acts comprising: transmitting a first paging message, the first paging message indicating the first node; receiving a first message as a response to transmitting the first paging message, the first message including a first sub-message; wherein whether a first set of conditions 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 an RRC inactive state; whether the first set of conditions is satisfied is used to determine the first sub-message includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

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

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

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

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

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

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

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

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

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

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

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

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

Example 5

Embodiment 5 illustrates a wireless signal transmission flow diagram according to one embodiment of the application, as shown in fig. 5. In fig. 5, a first node N51 and a second node N52 communicate via a wireless interface. It is specifically explained that the order in this example does not limit the order of signal transmission and the order of implementation in the present application.

For the followingFirst node N51Receiving a third message in step S511; entering or maintaining an RRC inactive state in step S512; receiving a first paging message in step S513; determining a first sub-message in step S514; transmitting a first message in step S515; all radio bearers in the first set of radio bearers are restored in step S516.

For the followingSecond node N52Transmitting a third message in step S521; transmitting a first paging message in step S522; the first message is received in step S523.

In embodiment 5, receiving a first paging message, the first paging message indicating the first node; determining a first sub-message based on whether the first set of conditions is satisfied; transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message; wherein the first paging message indicates that the first set of radio bearers performs data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first condition set includes at least pending (uplink) uplink data without radio bearers belonging to the first radio bearer set; the first message belongs to an SDT process or a first random access process; wherein all conditions in the first set of conditions are satisfied; the air interface resources occupied by the PRACH included in the first random access process are reserved for a random access process triggered by non-SDT; concomitantly sending the first message, recovering all radio bearers in the first radio bearer set; 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; receiving a third message prior to 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 set of radio bearers.

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

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

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

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

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

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

As an embodiment, the first identifier is included in the third message.

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

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

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

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

As an embodiment, the third message is RRC signaling.

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

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

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

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

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

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

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

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

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

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

As an embodiment, the act of entering or maintaining the RRC inactive state includes: the second set of radio bearers is suspended (suspended).

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

As one embodiment, the first set of radio bearers is a subset of the second set of radio bearers.

As one example, when a radio bearer is suspended, the radio bearer is not used for data transmission.

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

As an embodiment, the act of entering or maintaining the RRC inactive state includes: PDCP (PacketData Convergence Protocol) suspension is indicated to the bottom layer (lower layer) of all radio bearers in the second set of radio bearers.

As an embodiment, the act of entering or maintaining the RRC inactive state includes: RLC (Radio Link Control ) entity of re-establishment (re-establishment) SRB1 (Signaling Radio Bearer, signaling radio bearer 1).

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

As an embodiment, the act of entering or maintaining the RRC inactive state includes: reset (reset) MAC and if there is a default MAC cell group configuration (MAC Cell Group configuration), release the default MAC cell group configuration.

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

As an embodiment, the act of entering or maintaining the RRC inactive state includes: cell selection (cell selection) is performed.

As an embodiment, the first set of radio bearers comprises signaling radio bearers (signaling radio bearer, SRB).

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

As an embodiment, the first set of radio bearers includes signaling radio bearers 2 (SRB 2).

As an embodiment, the first set of radio bearers includes signaling radio bearers 3 (SRB 3).

As one embodiment, the first set of radio bearers includes data radio bearers (data radio bearer, DRBs).

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

As one embodiment, any one of the first set of radio bearers is configured for SDT transmission.

As one embodiment, any one of the first set of radio bearers is configured for downlink triggered SDT transmissions.

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

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

As an embodiment, the first message belongs to one of an SDT procedure or a first random access procedure when all conditions in the first set of conditions are fulfilled.

As one embodiment, the first transmitter, in response to receiving the first paging message, performs an SDT procedure, the act of performing an SDT procedure comprising sending the first message; wherein all conditions in the first set of conditions are satisfied.

As an embodiment, the SDT procedure comprises an RA-SDT procedure, or a CG-SDT procedure.

As an embodiment, when the SDT procedure is the RA-SDT procedure, performing the SDT procedure includes performing a random access procedure, and performing the random access procedure includes transmitting a PRACH, where an air interface resource occupied by the PRACH is reserved for the SDT-triggered random access procedure.

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

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

As one embodiment, when the SDT procedure is the CG-SDT procedure, performing the SDT procedure includes performing configuration grant type 1.

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

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

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

As an embodiment, the first transmitter performs a first random access procedure in response to receiving the first paging message, the act of performing the first random access procedure comprising transmitting the first message; wherein all conditions in the first set of conditions are satisfied.

As an embodiment, the act of performing the first random access procedure includes transmitting a PRACH, the air interface resources occupied by the PRACH being reserved for non-SDT triggered random access procedures.

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

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

As one embodiment, the SDT procedure is used to determine an SDT procedure to perform a downlink trigger.

As an embodiment, the air interface resource occupied by the PRACH included in the first random access procedure and the first sub-message are used together to determine to perform the SDT procedure triggered by downlink.

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

As an embodiment, the air interface resource includes at least one of a time domain resource, a frequency domain resource, a code domain resource, or a space domain resource.

As one embodiment, the pending uplink data arrives after receiving the first paging message and before initiating the SDT procedure.

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

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

As one embodiment, the non-SDT-triggered random access procedure includes a random access procedure triggered from an initial access (initial access) of an RRC IDLE (rrc_idle) state.

As an embodiment, the non-SDT triggered random access procedure comprises a request for other system information (System Information, SI) triggered random access procedure.

As an embodiment, when all conditions in the first set of conditions are met, all radio bearers in the first set of radio bearers are restored with sending the first message.

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

As an embodiment, the act of concomitantly sending the first message, recovering all radio bearers in the first set of radio bearers comprises: the behavior restoration all radio bearers in the first set of radio bearers are related to the sending of the first message.

As an embodiment, the act of concomitantly sending the first message, recovering all radio bearers in the first set of radio bearers comprises: restoring all radio bearers in the first set of radio bearers and sending the first message is not detachable (atomic).

As an embodiment, the act of concomitantly sending the first message, recovering all radio bearers in the first set of radio bearers comprises: transmitting the first message and recovering all radio bearers in the first set of radio bearers are mutually associated.

As an embodiment, the act of concomitantly sending the first message, recovering all radio bearers in the first set of radio bearers comprises: sending the first message is used to recover all radio bearers in the first set of radio bearers.

As an embodiment, the act of concomitantly sending the first message, recovering all radio bearers in the first set of radio bearers comprises: when the first message is sent (Upon transmission of the first message), all radio bearers in the first set of radio bearers are restored.

As an embodiment, the act of concomitantly sending the first message, recovering all radio bearers in the first set of radio bearers comprises: all radio bearers in the first set of radio bearers are restored following the sending of the first message (Following the transmission of the first message).

As an embodiment, the act of concomitantly sending the first message, recovering all radio bearers in the first set of radio bearers comprises: and immediately recovering all radio bearers in the first radio bearer set, and sending the first message.

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

As an embodiment, the act of recovering all radio bearers in the first set of radio bearers comprises: reconstructing (re-establishment) PDCP entities (entities) for each radio bearer included in the first set of radio bearers.

As an embodiment, the act of recovering all radio bearers in the first set of radio bearers comprises: for each radio bearer included in the first set of radio bearers, reestablishing a PDCP entity for the radio bearer without triggering a PDCP status report (status reporting).

And (5) transmission.

As an embodiment, radio bearers other than the first set of radio bearers are configured only for performing data transmission in RRC connected state.

As one embodiment, radio bearers other than the first set of radio bearers are not configured for the SDT procedure.

As an embodiment, radio bearers other than the first set of radio bearers are not configured for a downstream SDT procedure.

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

As an embodiment, when the uplink data to be processed does not belong to any suspended radio bearer, the radio bearer for transmitting the uplink data to be processed is not yet established.

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

As an embodiment, the first node is not instructed to resume RRC connection after the initial access of the SDT procedure is successful or after the successful completion of the first random access procedure when all conditions in the first set of conditions are met.

As an embodiment, in the RRC inactive state, the first receiver receives a first MAC SDU (Service Data Unit, traffic data unit) belonging to one radio bearer of the first set of radio bearers.

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

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

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

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

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 a success random access response (success rar).

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

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

As a sub-embodiment of the above embodiment, the fifth message is a first downlink allocation (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 diagram according to one embodiment of the application, as shown in fig. 6. In fig. 6, a first node N61 and a second node N62 communicate via a wireless interface. It is specifically explained that the order in this example does not limit the order of signal transmission and the order of implementation in the present application.

For the followingFirst node N61Receiving a third message in step S611; entering or maintaining an RRC inactive state in step S612; receiving a first paging message in step S613; recovering all radio bearers in the first set of radio bearers in step S614; determining a first sub-message in step S615; the first message is sent in step S616.

For the followingSecond node N62Transmitting a third message in step S621; transmitting a first paging message in step S622; the first message is received in step S623.

In embodiment 6, receiving a first paging message, the first paging message indicating the first node; determining a first sub-message based on whether the first set of conditions is satisfied; transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message; wherein the first paging message indicates that the first set of radio bearers performs data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first condition set includes at least pending (uplink) uplink data without radio bearers belonging to the first radio bearer set; the first message belongs to an SDT process or a first random access process; wherein all conditions in the first set of conditions are satisfied; the air interface resources occupied by the PRACH included in the first random access process are reserved for a random access process triggered by non-SDT; recovering all radio bearers in the first set of radio bearers in response to receiving the first paging message; 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; receiving a third message prior to 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 set of radio bearers.

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

Unlike embodiment 5, the first paging message is used to trigger recovery of all radio bearers in the first set of radio bearers.

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

Example 7

Embodiment 7 illustrates a third wireless signal transmission flow diagram according to one embodiment of the application, as shown in fig. 7. In fig. 7, a first node N71 and a second node N72 communicate via a wireless interface. It is specifically explained that the order in this example does not limit the order of signal transmission and the order of implementation in the present application.

For the followingFirst node N71Receiving a third message in step S711; entering or maintaining an RRC inactive state in step S712; receiving a first paging message in step S713; determining a first sub-message in step S714; transmitting a first message in step S715; receiving a second message in step S716; all radio bearers in the first radio bearer set are restored in step S717.

For the followingSecond node N72A third message is sent in step S721; transmitting a first paging message in step S722; receiving a first message in step S723; the second message is sent in step S724.

In embodiment 7, receiving a first paging message, the first paging message indicating the first node; determining a first sub-message based on whether the first set of conditions is satisfied; transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message; wherein the first paging message indicates that the first set of radio bearers performs data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first condition set includes at least pending (uplink) uplink data without radio bearers belonging to the first radio bearer set; receiving a second message, the second message being a response to the first message, the second message being used to recover at least all radio bearers in the first set of radio bearers; the first message belongs to a second random access process, and an air interface resource occupied by PRACH included in the second random access process is reserved for a random access process triggered by non-SDT; any condition of 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; receiving a third message prior to 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 set of radio bearers.

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

As one embodiment, a second message is received, the second message being a response to the first message, the second message being used to recover at least all radio bearers in the first set of radio bearers; wherein any condition of the first set of conditions is not satisfied.

As an embodiment, the first message belongs to a second random access procedure, and an air interface resource occupied by the PRACH included in the second random access procedure is reserved for a random access procedure triggered by a non-SDT.

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

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

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

As an embodiment, the act of performing the second random access procedure includes transmitting a PRACH, the air interface resources occupied by the PRACH being reserved for non-SDT triggered random access procedures.

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 an IE (Information element ) in RRC signaling.

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

As an embodiment, the second message is rrcreseume (RRC resume)

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

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

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

As one embodiment, the second message is used to recover all radio bearers in the first set of radio bearers.

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

As an embodiment, the second message is used to recover all radio bearers that are suspended.

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

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

As an embodiment, the air interface resources occupied by the PRACH included in the second random access procedure are used together with the first sub-message to determine to 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 pending uplink data arrives after receiving the first paging message and before initiating the second random access procedure.

Example 8

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

As an embodiment, the first paging message comprises a paging record (paging record) comprising the first identity and a paging cause for paging the first node.

As an embodiment, the first paging message comprises a paging group (paging group) comprising the second identity and a paging cause.

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

As one embodiment, the paging cause is SDT.

In case a of embodiment 8, the first paging message includes a paging record, where the paging record includes a ue-Identity (user equipment Identity) field and a paging cause field, where the ue-Identity field is used to indicate the first node, and the paging cause is used to indicate that a paging cause for sending the first paging message is a downlink triggered SDT; wherein the paging ue-Identity is the first Identity.

In case B of embodiment 8, the first paging message includes a paging group, where the paging group includes a TMGI-Identity (TMGI Identity) field and a paging cause field, where the TMGI-Identity field is used to indicate one or more MBS sessions indicated by the TMGI that the first node has joined, and the paging cause is a downlink triggered SDT.

Example 9

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

In embodiment 9, the first message is an rrcresemerequest information element, and the first message includes a resumeIdentity field, a resumeMAC-I field, a resumevaue field, and a spare field; wherein the resumeintensity field is used to indicate the first node; the resumeMAC-I domain comprises an authentication token (authentication token) used to authenticate a UE, i.e. the first node, at the second node; the resumecase field includes the first sub-message, which is used to indicate a cause of an RRC resume request; the spark field is used to satisfy that the RRCResumeRequest information element includes a positive integer number of bits of 2.

Example 10

Embodiment 10 illustrates a block diagram of the processing means in the first node according to an embodiment of the application, as shown in fig. 10. In fig. 10, a first node processing apparatus 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, the first paging message indicating the first node; a first transmitter 1002 that determines a first sub-message based on whether a first set of conditions is satisfied; transmitting a first message as a response to receiving the first paging message, the first message including the first sub-message; wherein the first paging message indicates that the first set of radio bearers performs data transmission in an RRC inactive state; the act of determining the first sub-message based on whether the first set of conditions is satisfied includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

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

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

As an embodiment, the first message belongs to one of an SDT procedure or a first random access procedure; wherein all conditions in the first set of conditions are satisfied; the air interface resources occupied by the PRACH included in the first random access process are reserved for a random access process triggered by non-SDT; the first transmitter 1002, in response to receiving the first paging message, resumes all radio bearers in the first set of radio bearers.

As an embodiment, the first receiver 1001 receives a second message, which is a response to the first message, and the second message is used to recover at least all radio bearers in the first set of radio bearers; the first message belongs to a second random access process, and an air interface resource occupied by PRACH included in the second random access process is reserved for a random access process triggered by non-SDT; any condition of the first set of conditions is not satisfied.

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

As an embodiment, the first receiver 1001 receives a third message before receiving the first paging message, the third message being used to indicate to enter or maintain the RRC inactive state; wherein the third message indicates the first set of radio bearers.

As an example, the first receiver 1001 includes the receiver 454 (including the antenna 452) of fig. 4, the receive processor 456, the multi-antenna receive processor 458, and the controller/processor 459 of the present application.

As an example, the first receiver 1001 includes at least one of the receiver 454 (including the antenna 452), the receive processor 456, the multi-antenna receive processor 458, or the controller/processor 459 of fig. 4 of the present application.

As an example, the first receiver 1001 includes the controller/processor 459 of fig. 4 of the present application.

As one example, the first transmitter 1002 includes the transmitter 454 (including the antenna 452) of fig. 4, the transmit processor 468, the multi-antenna transmit processor 457, and the controller/processor 459 of the present application.

As one example, the first transmitter 1002 may include at least one of the transmitter 454 (including the antenna 452), the transmit processor 468, the multi-antenna transmit processor 457, or the controller/processor 459 of fig. 4 of the present application.

As an example, the first transmitter 1002 includes the controller/processor 459 of fig. 4 of the present application.

Example 11

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

In embodiment 11, the second transmitter 1102 transmits a first paging message, the first paging message indicating the first node; the second receiver 1101, in response to transmitting the first paging message, receives a first message including a first sub-message; wherein whether a first set of conditions 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 an RRC inactive state; whether the first set of conditions is satisfied is used to determine the first sub-message includes: when all conditions in the first condition set are satisfied, the first sub-message belongs to a first candidate message set; when any one of the first condition sets is not satisfied, the first sub-message belongs to a second candidate message set; the first set of conditions includes at least pending (pending) uplink data for radio bearers not belonging to the first set of radio bearers.

As an embodiment, the first message belongs to one of an SDT procedure or a first random access procedure; wherein all conditions in the first set of conditions are satisfied; the air interface resources occupied by the PRACH included in the first random access process are reserved for a random access process triggered by non-SDT; with the first message sent, all radio bearers in the first set of radio bearers are restored.

As an embodiment, the first message belongs to one of an SDT procedure or a first random access procedure; wherein all conditions in the first set of conditions are satisfied; the air interface resources occupied by the PRACH included in the first random access process are reserved for a random access process triggered by non-SDT; in response to the first paging message being received, all radio bearers in the first set of radio bearers 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 recover at least all radio bearers in the first set of radio bearers; the first message belongs to a second random access process, and an air interface resource occupied by PRACH included in the second random access process is reserved for a random access process triggered by non-SDT; any condition of the first set of conditions is not satisfied.

As an embodiment, the second transmitter 1102 transmits a third message before transmitting the first paging message, the third message being used to instruct entering or maintaining the RRC inactive state; wherein the third message indicates the first set of radio bearers.

The second receiver 1101 includes, as one example, the receiver 418 (including the antenna 420), the receive processor 470, the multi-antenna receive processor 472, and the controller/processor 475 of fig. 4 of the present application.

As an example, the second receiver 1101 includes at least one of the receiver 418 (including the antenna 420), the receive processor 470, the multi-antenna receive processor 472, or the controller/processor 475 of fig. 4 of the present application.

As an example, 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 of fig. 4 of the present application.

As an example, the second transmitter 1102 may include at least one of the transmitter 418 (including the antenna 420), the transmit processor 416, the multi-antenna transmit processor 471, or the controller/processor 475 of fig. 4 of the present application.

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

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A first node for wireless communication, comprising:

2. The first node of claim 1, wherein the first message belongs to one of an SDT procedure or a first random access procedure;

3. The first node of claim 2, comprising:

the first transmitter, along with sending the first message, resumes all radio bearers in the first set of radio bearers.

4. The first node of claim 2, comprising:

the first transmitter, in response to receiving the first paging message, resumes all radio bearers in the first set of radio bearers.

5. The first node of claim 1, comprising:

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

6. The first node according to any of claims 1-5, wherein radio bearers outside the first set of radio bearers are not configured to perform data transmission in the RRC inactive state or wherein radio bearers outside the first set of radio bearers have not been established.

7. The first node according to any of claims 1 to 6, comprising:

the first receiver receiving a third message prior to 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 set of radio bearers.

8. A second node for wireless communication, comprising:

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

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