A method and apparatus used in wireless communication

Abstract

A method and apparatus used in wireless communication are disclosed. A first node receives a first message used to indicate entering a RRC inactive state; determines whether any condition in a first set of conditions is satisfied in the RRC inactive state; performs a first action in response to any condition in the first set of conditions being satisfied; wherein the first message indicates at least one radio bearer, the first message is used to determine whether the first action is entering a RRC idle state or sending a second message, the second message is RRC signaling; the first set of conditions includes at least a first condition, a channel quality of at least a first cell being worse than a specific threshold is used to determine whether the first condition is satisfied, the first cell is a serving cell of the first node. The present application can support mobility of different scenarios in the RRC inactive state.

Description

Technical Field

[0001] This application relates to a method and apparatus for use in a wireless communication system, and more particularly to a method and apparatus for supporting mobility when in an RRC inactive state in wireless communication. Background Technology

[0002] The RRC Inactive state is a newly introduced RRC (radio resource control) state in NR (New Radio). When a UE (User Equipment) enters the RRC Inactive state, it can retain some network configuration information. When a service arrives, the UE can re-enter the RRC Connected state to transmit data. Until Rel-16, data transmission in the RRC Inactive state is not supported in 3GPP (3rd Generation Partner Project) RAN (Radio Access Network).

[0003] The application scenarios of future wireless communication systems are becoming increasingly diversified. With the rapid development of the Internet of Things (IoT), small data services will be an important service in future wireless communication. For small data transmission, the signaling overhead of RRC state transition is greater than the transmission overhead of small data, and it also increases the power consumption of the UE. Therefore, at the 3GPP RAN#88e plenary meeting, it was decided to initiate the WI (Work Item) standardization work for small data transmission in the RRC inactive state.

[0004] Although multicast / broadcast transmission features are not supported in the earliest versions of 5G (Fifth Generation), namely Releases 15 and 16, their one-to-many transmission capability can significantly improve system performance and user experience in many important application scenarios, such as public safety and mission-critical tasks, V2X (Vehicle-to-Everything) applications, software delivery, and group communications. To support multicast / broadcast communication, 5G broadcast evolution was discussed between 3GPP RAN#78 and RAN#80 plenary meetings, and the 5G broadcast service architecture evolution study project (SI) was approved at SA (Service and System Aspects)#85 meeting. To support reliable MBS (multicast / broadcast service) transmission, 3GPP conducted research on MBS service transmission in RRC connection states in Rel-17. To further conserve UE power consumption, 3GPP began discussing support for MBS in the RRC inactive state in Rel-18. Summary of the Invention

[0005] Through research, the inventors discovered that when a UE detects that the cell handover conditions are met in the RRC connected state, the UE can hand over to a neighboring cell. However, when the UE measures that the radio link quality of the serving cell deteriorates while the radio link quality of the neighboring cell is better in the RRC inactive state, it is necessary to study how the UE can support mobility, especially how to ensure service continuity when the UE is receiving MBS.

[0006] This application discloses a solution in which a UE supports different mobility processing based on the measured radio link quality and whether the UE is in a transmission service state during RRC inactivity. Although this application is initially intended for the Uu air interface, it can also be used for the PC5 air interface. Furthermore, adopting a unified solution for different scenarios (including but not limited to uplink communication scenarios) helps reduce hardware complexity and cost. Unless otherwise specified, the embodiments and features in the first node of this application can be applied to any other node, and vice versa. Unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other. In particular, the interpretation of terms, nouns, functions, and variables in this application (unless otherwise specified) can be found in the definitions in the 3GPP specification protocols TS36, TS38, and TS37 series.

[0007] This application discloses a method used in a first node of wireless communication, characterized by comprising:

[0008] Receive a first message, which is used to indicate entering an RRC inactive state;

[0009] In the RRC inactive state, determine whether any condition in the first set of conditions is satisfied;

[0010] In response to the fulfillment of any condition in the first set of conditions, execute the first action;

[0011] Wherein, the first message indicates at least one radio bearer, the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first condition set includes at least a first condition, at least the channel quality of the first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the first node.

[0012] As an example, the above method can improve flexibility by determining the first action based on the first message.

[0013] As an example, the above method can design different sets of the first conditions based on the first message to optimize the network's support for different scenarios.

[0014] As an example, the above method can reduce UE power consumption by transitioning from the RRC inactive state to the RRC idle (RRC_IDLE) state.

[0015] According to one aspect of this application, it includes:

[0016] At least one wireless bearer is in an active state.

[0017] According to one aspect of this application, it includes:

[0018] The channel quality of the second cell is used to determine whether the first condition is met;

[0019] The second cell is a neighboring cell of the first cell.

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

[0021] The second message is used to indicate that the RRC reconfiguration is complete;

[0022] The second message is sent in the second cell, which belongs to the target candidate cell set; data from the MBS is sent via multicast in any target candidate cell in the target candidate cell set; after the second message is sent, the first node maintains the RRC inactive state.

[0023] As an example, the above method allows for rapid switching to the second cell by sending the second message in the second cell, reducing service interruption time.

[0024] According to one aspect of this application, it includes:

[0025] The second message is used to request the restoration of the RRC connection;

[0026] The second message is sent in the first cell.

[0027] According to one aspect of this application, it includes:

[0028] In response to sending the second message, a third message is received, which is used to indicate entering the RRC connection state.

[0029] As an example, the above method enters the RRC connection state after sending the second message, and then cell handover can be performed in the RRC connection state, which can simplify the protocol complexity.

[0030] According to one aspect of this application, it includes:

[0031] In response to sending the second message, a fourth message is received, which is used to maintain the RRC inactive state;

[0032] The second message is used to request cell handover; the fourth message is used to indicate cell handover.

[0033] As an example, the above method can quickly perform cell handover and reduce service interruption time by maintaining the RRC inactive state after sending the second message.

[0034] According to one aspect of this application, it includes:

[0035] The at least one radio bearer includes a multicast MRB, which is used to transmit the data from the MBS.

[0036] This application discloses a first node used for wireless communication, characterized in that it comprises:

[0037] A first receiver receives a first message, which is used to indicate entering an RRC inactive state.

[0038] The first processor determines whether any condition in the first set of conditions is met in the RRC inactive state; and executes a first action in response to any condition in the first set of conditions being met.

[0039] Wherein, the first message indicates at least one radio bearer, the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first condition set includes at least a first condition, at least the channel quality of the first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the first node.

[0040] This application discloses a method used in a second node for wireless communication, characterized by comprising:

[0041] Send a first message, which is used to indicate entering an RRC inactive state;

[0042] Wherein, the recipient of the first message determines whether any condition in the first condition set is met in the RRC inactive state; in response to any condition in the first condition set being met, a first action is performed by the recipient of the first message; wherein, the first message indicates at least one radio bearer, the first message is used to determine whether the first action is to enter the RRC idle state or to send a second message, the second message being RRC signaling; the first condition set includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the recipient of the first message.

[0043] According to one aspect of this application, it includes:

[0044] At least one wireless bearer is in an active state.

[0045] According to one aspect of this application, it includes:

[0046] The channel quality of the second cell is used to determine whether the first condition is met;

[0047] The second cell is a neighboring cell of the first cell.

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

[0049] The second message is received, which is used to request the restoration of the RRC connection.

[0050] According to one aspect of this application, it includes:

[0051] In response to receiving the second message, a third message is sent, which is used to indicate entering the RRC connection state.

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

[0053] In response to receiving the second message, a fourth message is sent, which is used to maintain the RRC inactive state; wherein the second message is used to request cell handover; and the fourth message is used to indicate cell handover.

[0054] According to one aspect of this application, it includes:

[0055] The at least one radio bearer includes a multicast MRB, which is used to transmit the data from the MBS.

[0056] This application discloses a second node used for wireless communication, characterized in that it comprises:

[0057] The second transmitter sends a first message, which is used to indicate entering the RRC inactive state;

[0058] Wherein, the recipient of the first message determines whether any condition in the first condition set is met in the RRC inactive state; in response to any condition in the first condition set being met, a first action is performed by the recipient of the first message; wherein, the first message indicates at least one radio bearer, the first message is used to determine whether the first action is to enter the RRC idle state or to send a second message, the second message being RRC signaling; the first condition set includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the recipient of the first message.

[0059] This application discloses a method used in a third node for wireless communication, characterized by comprising:

[0060] A second message is received, which is used to indicate that the RRC reconfiguration is complete; wherein the second message is sent in a second cell, which belongs to the target candidate cell set; data from the MBS is sent via multicast in any target candidate cell in the target candidate cell set.

[0061] According to one aspect of this application, it includes:

[0062] A first message is sent, indicating entry into an RRC inactive state; the recipient of the first message determines whether any condition in a first set of conditions is met in the RRC inactive state; in response to the satisfaction of any condition in the first set of conditions, a first action is performed by the recipient of the first message; wherein the first message indicates at least one radio bearer, and the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, and at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the recipient of the first message.

[0063] According to one aspect of this application, it includes:

[0064] At least one wireless bearer is in an active state.

[0065] According to one aspect of this application, it includes:

[0066] The channel quality of the second cell is used to determine whether the first condition is met;

[0067] The second cell is a neighboring cell of the first cell.

[0068] According to one aspect of this application, it includes:

[0069] After the second message is sent, the recipient of the first message maintains the RRC inactive state.

[0070] According to one aspect of this application, it includes:

[0071] The at least one radio bearer includes a multicast MRB, which is used to transmit the data from the MBS.

[0072] This application discloses a third node used for wireless communication, characterized in that it comprises:

[0073] The third receiver receives the second message, which is used to indicate that the RRC reconfiguration is complete.

[0074] The second message is sent in a second cell, which belongs to the target candidate cell set; data from MBS is sent via multicast in any target candidate cell in the target candidate cell set. Attached Figure Description

[0075] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0076] Figure 1 A transmission flowchart of a first node according to an embodiment of this application is illustrated;

[0077] Figure 2 A schematic diagram illustrating a network architecture according to an embodiment of this application is provided;

[0078] Figure 3 A schematic diagram illustrating a wireless protocol architecture for the user plane and control plane according to an embodiment of this application is provided.

[0079] Figure 4 A schematic diagram of the hardware module of a communication device according to an embodiment of this application is illustrated;

[0080] Figure 5 A flowchart illustrating a wireless signal transmission process according to one embodiment of this application is provided.

[0081] Figure 6 Another wireless signal transmission flowchart according to one embodiment of this application is illustrated;

[0082] Figure 7 A third wireless signal transmission flowchart according to an embodiment of this application is illustrated;

[0083] Figure 8 A fourth wireless signal transmission flowchart according to an embodiment of this application is illustrated;

[0084] Figure 9 A schematic diagram illustrating the positional relationship between a first cell and a second cell according to an embodiment of this application is provided.

[0085] Figure 10 A structural block diagram of a processing apparatus in a first node according to an embodiment of this application is illustrated;

[0086] Figure 11 A structural block diagram of a processing apparatus in a second node according to an embodiment of this application is illustrated;

[0087] Figure 12 A structural block diagram of a processing apparatus in a third node according to an embodiment of this application is illustrated. Detailed Implementation

[0088] The technical solution of this application will be further described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0089] Example 1

[0090] Example 1 illustrates a transmission flowchart of a first node according to an embodiment of this application, as shown in the attached diagram. Figure 1 As shown.

[0091] In Embodiment 1, the first node 100 receives a first message in step 101, the first message being used to indicate entering an RRC inactive state; in step 102, it determines whether any condition in a first set of conditions is satisfied in the RRC inactive state; in step 103, as a response to any condition in the first set of conditions being satisfied, it performs a first action; wherein, the first message indicates at least one radio bearer, the first message being used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold being used to determine whether the first condition is satisfied, the first cell being the serving cell of the first node.

[0092] As an example, in response to receiving the first message, the system enters an RRC inactive state.

[0093] As an example, the phrase entering the RRC inactive state includes: entering the RRC inactive state from the RRC connected state.

[0094] As an example, the phrase entering the RRC inactive state includes: maintaining the RRC inactive state.

[0095] As one example, the first message is received via an air interface.

[0096] As an example, the air interface is an NR air interface.

[0097] As an example, the air interface is a Uu interface.

[0098] As an example, the first message is a high-level message.

[0099] As an example, the first message is an RRC layer message.

[0100] As an example, the first message is RRCRelease; the first message includes the suspendConfig field.

[0101] As an example, the first message is used to indicate that the RRC connection should be suspended.

[0102] As an example, the first message indicates at least one wireless bearer.

[0103] As an example, the at least one wireless bearer is used to transmit data in the RRC inactive state.

[0104] As an example, the first message includes sdt-DRBList (small data-DRB list).

[0105] As one example, the first message includes a multicast MRBList.

[0106] As one embodiment, the at least one radio bearer includes a DRB (Data Radio Bearer).

[0107] As one embodiment, the at least one radio bearer includes a multicast MRB (MBS Radio Bearer).

[0108] As an example, the first message implicitly indicates the multicast MRB.

[0109] As a sub-example of the above embodiments, the first message does not include the bearer identifier of the multicast MRB, and the multicast MRB is in an active state before receiving the first message.

[0110] As an example, the multicast MRB is used to transmit MBS.

[0111] As an example, the multicast MRB is a radio bearer configured to receive MBS via multicast.

[0112] As an example, the at least one wireless bearer indicated by the first message is used for data transmission when the RRC is inactive.

[0113] As an example, the first message is used to instruct the suspension of data radio bearers other than the at least one radio bearer.

[0114] As an example, the first message is used to instruct the suspension of an MBS wireless bearer other than the at least one wireless bearer.

[0115] As an example, measurements for at least one cell are used to determine whether any of the conditions in the first set of conditions is met.

[0116] As an example, in the RRC inactive state, it is determined whether any condition in the first set of conditions is satisfied.

[0117] As an example, whether there is an active wireless bearer transmitted via non-broadcast during the RRC inactive state is used to determine whether any condition in the first set of conditions is met.

[0118] As one example, the non-broadcast transmission includes unicast transmission.

[0119] As one example, the non-broadcast transmission includes multicast transmission.

[0120] As an example, in response to the satisfaction of any condition in the first set of conditions, a first action is performed.

[0121] As one embodiment, the first message indicates at least one radio bearer, and whether the at least one radio bearer is active is used to determine whether the first action is to enter the RRC idle state or to send a second message.

[0122] As one embodiment, the first message indicates at least one radio bearer, the type of which is used to determine whether the first action is to enter an RRC idle state or to send a second message.

[0123] As an example, a wireless bearer is of type DRB.

[0124] As an example, a radio bearer of type multicast MRB.

[0125] As an example, a type of wireless bearer is a broadcast MRB.

[0126] As an example, a radio bearer is of type SRB (Signaling Radio Bearer).

[0127] As an example, a wireless bearer is of type MRB.

[0128] As an example, the first message is used to determine that the first action is to enter the RRC idle state.

[0129] As one embodiment, the first message is used to determine that the first action is to send a second message.

[0130] As an example, the name of the second message includes RRC.

[0131] Typically, the second message is used to determine a first RRC state, which is an RRC state other than the RRC idle state.

[0132] As an example, an RRC state other than the RRC idle state is the RRC inactive state.

[0133] As an example, one of the RRC states other than the RRC idle state is the RRC connected state.

[0134] As one embodiment, the phrase "the second message is used to determine the first RRC state" includes: the second message is used to determine to maintain the first RRC state, where the first RRC state is the RRC inactive state.

[0135] As one embodiment, the phrase "the second message is used to determine the first RRC state" includes: the second message is used to determine entering the first RRC state, where the first RRC state is an RRC connection state.

[0136] As an example, the first set of conditions includes at least a first condition, wherein at least the channel quality of the first cell is worse than a specific threshold is used to determine whether the first condition is met.

[0137] As an example, measurements for at least one cell are used to determine whether the first condition is met.

[0138] As an example, when the channel quality of a cell is less than a threshold, the channel quality of the cell is worse than the threshold.

[0139] As an example, the channel quality of a cell is obtained by measurements taken for that cell.

[0140] As an example, the channel quality of a cell is obtained by processing measurements taken for that cell.

[0141] As an example, the channel quality of a cell is obtained by processing the RSRP (Reference Signal Received Power) measured for that cell.

[0142] As an example, the channel quality of a cell is obtained by processing the RSRQ (Reference Signal Received Quality) measured for that cell.

[0143] As an example, the channel quality of a cell is the RS-SINR (reference signal-to-noise and interference ratio) measured for that cell.

[0144] As an example, a measurement for a cell includes a measurement of the SSB (SS / PBCH block, synchronization signal / physical broadcast channel block) transmitted in the cell.

[0145] As one embodiment, data from the at least one wireless bearer is transmitted via at least one type of first signal.

[0146] As an example, each of the at least one first-type signals includes data from the at least one radio bearer.

[0147] As an example, each of the at least one first-type signal is associated with an SSB in the first cell.

[0148] As an example, the at least one first-type signal is a PDSCH (Physical Downlink Shared Channel).

[0149] As an example, the at least one first-type signal is PUSCH (Physical Uplink Shared Channel).

[0150] As an example, the measurement for the first cell includes the measurement of the SSB (SS / PBCH block, synchronization signal / physical broadcast channel block) transmitted in the first cell.

[0151] As an example, the measurement for the first cell includes the measurement of the SSB associated with each of the at least one first-type signals received from the first cell.

[0152] As an example, the association of each of the at least one first-type signals in the phrase with an SSB in the first cell includes: the multi-antenna reception parameters of each of the at least one first-type signals are the same as the multi-antenna reception parameters of an SSB in the first cell.

[0153] As an example, the association of each of the at least one first-type signals in the phrase with an SSB in the first cell includes: the multi-antenna reception parameters of each of the at least one first-type signals can be used to infer the multi-antenna reception parameters of an SSB in the first cell.

[0154] As an example, the association of each of the at least one first-type signals in the phrase with an SSB in the first cell includes: the reception of each of the at least one first-type signals is used to determine the multi-antenna reception parameters of an SSB in the first cell.

[0155] As one embodiment, the multi-antenna receiving parameters include a spatial domain filter.

[0156] As one embodiment, the multi-antenna reception parameters include spatial relation parameters.

[0157] As one embodiment, the multi-antenna reception parameters include QCL (Quasi-CoLocation) parameters.

[0158] As an example, the QCL parameter includes the QCL type.

[0159] As an example, the QCL parameters include at least one of the following: {delay spread, Doppler spread, Doppler shift, path loss, average gain, average delay, and spatial Rx parameters}.

[0160] As an example, the specific definition of the QCL parameter can be found in section 5.1.5 of 3GPP TS38.214.

[0161] As an example, the measurement for the first cell includes the measurement of the DMRS (DeModulation Reference Signal) for each of the at least one first type of signal received from the first cell.

[0162] As an example, the measurement for the first cell includes the measurement of DMRS included in the scheduling signaling for each of the at least one first type of signal received from the first cell.

[0163] As an example, the scheduling signaling is physical layer signaling.

[0164] As an example, the scheduling signaling is PDCCH (Physical Downlink Control Channel).

[0165] As an example, the scheduling signaling is DCI (Downlink Control Information).

[0166] As an example, the first cell is the serving cell of the first node.

[0167] As an example, the first cell is the SpCell (Special Cell) of the first node.

[0168] Example 2

[0169] Example 2 illustrates a schematic diagram of a network architecture according to an embodiment of this application, as shown in the attached diagram. Figure 2 As shown. Figure 2This describes the network architecture 200 for NR 5G, LTE (Long-Term Evolution), and LTE-A (Long-Term Evolution Advanced) systems. The NR 5G, LTE, or LTE-A network architecture 200 may be referred to as 5GS (5G System) / EPS (Evolved Packet System) 200 or some other suitable term. 5GS / EPS 200 may include one or more UE (User Equipment) 201, NG-RAN (Next Generation Radio Access Network) 202, 5GC (5G Core Network) / EPC (Evolved Packet Core) 210, HSS (Home Subscriber Server) / UDM (Unified Data Management) 220, and Internet services 230. 5GS / EPS 200 can interconnect with other access networks, but these entities / interfaces are not shown for simplicity. As shown in the figure, the 5GS / EPS 200 provides packet-switched services; however, those skilled in the art will readily understand that the various concepts presented throughout this application can be extended to networks providing circuit-switched services or other cellular networks. NG-RAN includes NR Node B (gNB) 203 and other gNBs 204. gNB 203 provides user and control plane protocol termination toward UE 201. gNB 203 can connect to other gNBs 204 via the Xn interface (e.g., backhaul). The XnAP protocol of the Xn interface is used to transmit control plane messages for the radio network, and the user plane protocol of the Xn interface is used to transmit user plane data. gNB 203 may also be referred to as a base station, base transceiver station, wireless base station, wireless transceiver, transceiver function, Basic Service Set (BSS), Extended Service Set (ESS), TRP (Transmission Reception Point), or some other suitable term. In an NTN network, gNB 203 can be a satellite, an aircraft, or a ground base station relayed via satellite. gNB203 provides UE201 with an access point to 5GC / EPC210.Examples of UE201 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptop computers, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, drones, aircraft, narrowband IoT devices, machine-type communication devices, land vehicles, automobiles, in-vehicle equipment, in-vehicle communication units, wearable devices, or any other similar functional devices. Those skilled in the art may also refer to UE201 as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or any other suitable term. gNB203 connects to 5GC / EPC210 via the S1 / NG interface. 5GC / EPC210 includes MME (Mobility Management Entity) / AMF (Authentication Management Field) / SMF (Session Management Function) 211, other MME / AMF / SMF 214, S-GW (Service Gateway) / UPF (User Plane Function) 212, and P-GW (Packet Data Network Gateway) / UPF 213. MME / AMF / SMF 211 is the control node that handles signaling between UE201 and 5GC / EPC210. ​​Generally, MME / AMF / SMF 211 provides bearer and connection management. All user IP (Internet Protocol) packets are transmitted through the S-GW / UPF212, which is itself connected to the P-GW / UPF213. The P-GW provides UE IP address allocation and other functions. The P-GW / UPF213 is connected to Internet service 230. Internet service 230 includes operator-compliant Internet Protocol services, specifically including the Internet, intranet, IMS (IP Multimedia Subsystem), and PS (Packet Switching) streaming services.

[0170] As an example, UE201 corresponds to the first node in this application.

[0171] As an example, gNB203 corresponds to the second node in this application.

[0172] As an example, gNB204 corresponds to the third node in this application.

[0173] As an example, the gNB203 is a macrocell base station.

[0174] As an example, the gNB203 is a microcell base station.

[0175] As an example, the gNB203 is a pico cell base station.

[0176] As an example, the gNB203 is a femtocell.

[0177] As an example, the gNB203 is a base station device that supports large latency differences.

[0178] As one example, the gNB203 is a flight platform device.

[0179] As an example, the gNB203 is a satellite device.

[0180] As an example, the gNB204 is a macrocell base station.

[0181] As an example, the gNB204 is a microcell base station.

[0182] As an example, the gNB204 is a pico cell base station.

[0183] As an example, the gNB204 is a femtocell.

[0184] As an example, the gNB204 is a base station device that supports large latency differences.

[0185] As one example, the gNB204 is a flight platform device.

[0186] As an example, the gNB204 is a satellite device.

[0187] As an example, the radio link from the UE201 to the gNB203 is an uplink.

[0188] As an example, the radio link from the gNB203 to the UE201 is a downlink.

[0189] As an example, the radio link from the UE201 to the gNB204 is an uplink.

[0190] As an example, the radio link from the gNB204 to the UE201 is a downlink.

[0191] As an example, the UE201 and the gNB203 are connected via a Uu interface.

[0192] As an example, the UE201 and the gNB204 are connected via a Uu interface.

[0193] Example 3

[0194] Example 3 illustrates a schematic diagram of a wireless protocol architecture for the user plane and control plane according to an embodiment of this application, as shown in the attached diagram. Figure 3 As shown. Figure 3 This is a schematic diagram illustrating an embodiment of a wireless protocol architecture for the user plane 350 and the control plane 300. Figure 3The radio protocol architecture of the UE and gNB control plane 300 is illustrated using three layers: Layer 1, Layer 2, and Layer 3. Layer 1 (L1 layer) is the lowest layer and implements various PHY (Physical Layer) signal processing functions. L1 layer will be referred to as PHY301 in this document. Layer 2 (L2 layer) 305 sits above PHY301 and is responsible for the link between the UE and gNB through PHY301. L2 layer 305 includes the MAC (Medium Access Control) sublayer 302, the RLC (Radio Link Control) sublayer 303, and the PDCP (Packet Data Convergence Protocol) sublayer 304, which terminate at the gNB on the network side. The PDCP sublayer 304 provides data encryption and integrity protection, and also provides cross-cell mobility support for the UE between gNBs. RLC sublayer 303 provides packet segmentation and reassembly, implements retransmission of lost packets through ARQ, and also provides duplicate packet detection and protocol error detection. MAC sublayer 302 provides mapping between logical and transport channels and multiplexing of logical channel identities. MAC sublayer 302 is also responsible for allocating various radio resources (e.g., resource blocks) within a cell among UEs. MAC sublayer 302 is also responsible for HARQ (Hybrid Automatic Repeat Request) operations. The RRC (Radio Resource Control) sublayer 306 in Layer 3 (L3) of the control plane 300 is responsible for obtaining radio resources (i.e., radio bearers) and configuring the lower layers using RRC signaling between the gNB and the UE. The wireless protocol architecture of user plane 350 includes Layer 1 (L1 layer) and Layer 2 (L2 layer). The wireless protocol architecture in user plane 350 is largely the same as the corresponding layers and sublayers in control plane 300 for physical layer 351, PDCP sublayer 354 in L2 layer 355, RLC sublayer 353 in L2 layer 355, and MAC sublayer 352 in L2 layer 355. However, PDCP sublayer 354 also provides header compression for upper layer packets to reduce wireless transmission overhead. L2 layer 355 in user plane 350 also includes SDAP (Service Data Adaptation Protocol) sublayer 356. SDAP sublayer 356 is responsible for mapping between QoS (Quality of Service) streams and Data Radio Bearer (DRB) to support service diversity.The UE's radio protocol architecture in the user plane 350 may include some or all of the protocol sublayers of SDAP sublayer 356, PDCP sublayer 354, RLC sublayer 353, and MAC sublayer 352 at the L2 layer. Although not illustrated, the UE may also have several upper layers above the L2 layer 355, including a network layer (e.g., IP layer) terminating at the P-GW on the network side and an application layer terminating at the other end of the connection (e.g., remote UE, server, etc.).

[0195] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the first node in this application.

[0196] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the second node in this application.

[0197] As an example, Appendix Figure 3 The wireless protocol architecture described herein is applicable to the third node in this application.

[0198] As an example, Appendix Figure 3 The entities of multiple sub-layers in the control plane form a Signaling Radio Bearer (SRB) in the vertical direction.

[0199] As an example, Appendix Figure 3 The entities of multiple sub-layers in the user plane form a DRB in the vertical direction.

[0200] As an example, Appendix Figure 3 Entities in multiple sub-layers of the user plane in the vertical direction form a multicast MRB.

[0201] As an example, Appendix Figure 3 The PDCP sublayer of the control plane provides signaling radio bearers to the RRC sublayer.

[0202] As an example, Appendix Figure 3 The PDCP sublayer of the user plane provides data radio bearers to the SDAP sublayer.

[0203] As an example, Appendix Figure 3 The PDCP sublayer of the user plane provides MBS radio bearers to the SDAP sublayer.

[0204] As an example, the first message in this application is generated in the RRC306.

[0205] As an example, the second message in this application is generated in the RRC306.

[0206] As an example, the third message in this application is generated in the RRC306.

[0207] As an example, the fourth message in this application is generated in the RRC306.

[0208] As an example, the at least one first-type signal in this application is generated in the PHY301 or the PHY351.

[0209] As an example, the L2 layer 305 is a high layer.

[0210] As an example, the RRC sublayer 306 in the L3 layer belongs to the higher layer.

[0211] Example 4

[0212] Example 4 illustrates a hardware module schematic diagram of a communication device according to an embodiment of this application, as shown in the attached diagram. Figure 4 As shown. Figure 4 This is a block diagram of a first communication device 450 and a second communication device 410 communicating with each other in the access network.

[0213] The first communication device 450 includes a controller / processor 459, a memory 460, a data source 467, a transmitting processor 468, a receiving processor 456, a multi-antenna transmitting processor 457, a multi-antenna receiving processor 458, a transmitter / receiver 454, and an antenna 452.

[0214] The second communication device 410 includes a controller / processor 475, a memory 476, a data source 477, a receiver processor 470, a transmitter processor 416, a multi-antenna receiver processor 472, a multi-antenna transmitter processor 471, a transmitter / receiver 418, and an antenna 420.

[0215] In the transmission from the second communication device 410 to the first communication device 450, at the second communication device 410, upper-layer data packets from the core network or from the data source 477 are provided to the controller / processor 475. The core network and data source 477 represent all protocol layers above the L2 layer. The controller / processor 475 implements the functionality of the L2 layer. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 475 provides header compression, encryption, packet segmentation and reordering, multiplexing between logical and transport channels, and radio resource allocation for the first communication device 450 based on various priority metrics. The controller / processor 475 is also responsible for retransmitting lost packets and signaling to the first communication device 450. The transmit processor 416 and the multi-antenna transmit processor 471 implement various signal processing functions for the L1 layer (i.e., the physical layer). Transmit processor 416 performs encoding and interleaving to facilitate forward error correction (FEC) at the second communication device 410, and mapping of signal clusters based on various modulation schemes (e.g., Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK), M-Phase Shift Keying (M-PSK), M-QAM). Multi-antenna transmit processor 471 performs digital spatial precoding on the encoded and modulated symbols, including codebook-based and non-codebook-based precoding, and beamforming processing, generating one or more spatial streams. Transmit processor 416 then maps each spatial stream to subcarriers, multiplexes it with a reference signal (e.g., a pilot) in the time and / or frequency domains, and subsequently uses inverse fast Fourier transform (IFFT) to generate a physical channel carrying the time-domain multicarrier symbol stream. Multi-antenna transmit processor 471 then performs transmit analog precoding / beamforming operations on the time-domain multicarrier symbol stream. Each transmitter 418 converts the baseband multicarrier symbol stream provided by the multi-antenna transmitter processor 471 into an radio frequency stream, which is then provided to different antennas 420.

[0216] In the transmission from the second communication device 410 to the first communication device 450, at the first communication device 450, each receiver 454 receives a signal through its corresponding antenna 452. Each receiver 454 recovers the information modulated onto the radio frequency carrier and converts the radio frequency stream into a baseband multicarrier symbol stream, which is then provided to the receiver processor 456. The receiver processor 456 and the multi-antenna receiver processor 458 implement various signal processing functions of the L1 layer. The multi-antenna receiver processor 458 performs receive analog precoding / beamforming operations on the baseband multicarrier symbol stream from the receiver 454. The receiver processor 456 uses a Fast Fourier Transform (FFT) to convert the baseband multicarrier symbol stream after the receive analog precoding / beamforming operations from the time domain to the frequency domain. In the frequency domain, the physical layer data signal and the reference signal are demultiplexed by the receiver processor 456, where the reference signal is used for channel estimation, and the data signal is recovered in the multi-antenna receiver processor 458 after multi-antenna detection to recover any spatial stream destined for the first communication device 450. Symbols on each spatial stream are demodulated and recovered in the receive processor 456, generating soft decisions. The receive processor 456 then decodes and deinterleaves the soft decisions to recover the upper-layer data and control signals transmitted by the second communication device 410 over the physical channel. The upper-layer data and control signals are then provided to the controller / processor 459. The controller / processor 459 implements the functions of Layer 2. The controller / processor 459 may be associated with a memory 460 storing program code and data. The memory 460 may be referred to as computer-readable media. In the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 provides multiplexing, packet reassembly, decryption, header decompression, and control signal processing between the transmission and logical channels to recover the upper-layer data packets from the second communication device 410. The upper-layer data packets are then provided to all protocol layers above Layer 2. Various control signals may also be provided to Layer 3 for Layer 3 processing.

[0217] In the transmission from the first communication device 450 to the second communication device 410, at the first communication device 450, upper-layer data packets are provided to the controller / processor 459 using a data source 467. The data source 467 represents all protocol layers above the L2 layer. Similar to the transmission functions at the second communication device 410 described in the transmission from the second communication device 410 to the first communication device 450, the controller / processor 459 implements header compression, encryption, packet segmentation and reordering, and multiplexing between the logical and transport channels, implementing L2 layer functions for the user plane and control plane. The controller / processor 459 is also responsible for retransmitting lost packets and signaling to the second communication device 410. Transmit processor 468 performs modulation mapping and channel coding processing, while multi-antenna transmit processor 457 performs digital multi-antenna spatial precoding, including codebook-based and non-codebook-based precoding, and beamforming processing. Subsequently, transmit processor 468 modulates the generated spatial stream into a multi-carrier / single-carrier symbol stream. After analog precoding / beamforming operations in multi-antenna transmit processor 457, the stream is provided to different antennas 452 via transmitter 454. Each transmitter 454 first converts the baseband symbol stream provided by multi-antenna transmit processor 457 into a radio frequency symbol stream before providing it to antenna 452.

[0218] In the transmission from the first communication device 450 to the second communication device 410, the function at the second communication device 410 is similar to the receiving function at the first communication device 450 described in the transmission from the second communication device 410 to the first communication device 450. Each receiver 418 receives radio frequency signals through its corresponding antenna 420, converts the received radio frequency signals into baseband signals, and provides the baseband signals to the multi-antenna receiving processor 472 and the receiving processor 470. The receiving processor 470 and the multi-antenna receiving processor 472 jointly implement the L1 layer function. The controller / processor 475 implements the L2 layer function. The controller / processor 475 may be associated with a memory 476 storing program code and data. The memory 476 may be referred to as computer-readable media. In the transmission from the first communication device 450 to the second communication device 410, the controller / processor 475 provides multiplexing between the transmission and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover the upper-layer data packets from the first communication device 450. Upper-layer data packets from the controller / processor 475 can be provided to the core network or all protocol layers above the L2 layer, and various control signals can also be provided to the core network or L3 for L3 processing.

[0219] As one embodiment, the first communication device 450 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the first communication device 450 at least: receives a first message, the first message being used to indicate entering an RRC inactive state; determines whether any condition in a first set of conditions is satisfied in the RRC inactive state; and performs a first action as a response to any condition in the first set of conditions being satisfied; wherein the first message indicates at least one radio bearer, the first message being used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold being used to determine whether the first condition is satisfied, and the first cell being the serving cell of the first node.

[0220] As one embodiment, the first communication device 450 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, generates an action, the action including: receiving a first message indicating entry into an RRC inactive state; determining whether any condition in a first set of conditions is satisfied in the RRC inactive state; and performing a first action in response to any condition in the first set of conditions being satisfied; wherein the first message indicates at least one radio bearer, the first message is used to determine whether the first action is entering an RRC idle state or sending a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is satisfied, and the first cell is the serving cell of the first node.

[0221] As one embodiment, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the second communication device 410 includes at least: sending a first message, the first message being used to indicate entering an RRC inactive state; wherein, in the RRC inactive state, the recipient of the first message determines whether any condition in a first set of conditions is met; as a response to any condition in the first set of conditions being met, a first action is performed by the recipient of the first message; wherein, the first message indicates at least one radio bearer, the first message being used to determine whether the first action is entering an RRC idle state or sending a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold being used to determine whether the first condition is met, the first cell being the serving cell of the recipient of the first message.

[0222] As one embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces an action including: sending a first message, the first message being used to indicate entering an RRC inactive state; wherein, in the RRC inactive state, a recipient of the first message determines whether any condition in a first set of conditions is satisfied; and, in response to any condition in the first set of conditions being satisfied, a first action is performed by the recipient of the first message; wherein the first message indicates at least one radio bearer, the first message being used to determine whether the first action is entering an RRC idle state or sending a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, and at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is satisfied, the first cell being the serving cell of the recipient of the first message.

[0223] As one embodiment, the second communication device 410 includes: at least one processor and at least one memory, the at least one memory including computer program code; the at least one memory and the computer program code are configured to be used with the at least one processor, and the second communication device 410 at least: receives a second message, the second message being used to indicate that RRC reconfiguration is complete; wherein the second message is transmitted in a second cell, the second cell belonging to a target candidate cell set; and transmits data from MBS via multicast in any target candidate cell in the target candidate cell set.

[0224] As one embodiment, the second communication device 410 includes: a memory storing a computer-readable instruction program that, when executed by at least one processor, produces actions including: receiving a second message used to indicate that RRC reconfiguration is complete; wherein the second message is transmitted in a second cell, the second cell belonging to a target candidate cell set; and transmitting data from the MBS via multicast in any target candidate cell in the target candidate cell set.

[0225] As one embodiment, the first communication device 450 corresponds to the first node in this application; the second communication device 410 corresponds to the second node in this application.

[0226] As one embodiment, the first communication device 450 corresponds to the first node in this application; the second communication device 410 corresponds to the third node in this application.

[0227] As an example, the first communication device 450 is a UE.

[0228] As one embodiment, the second communication device 410 is a base station.

[0229] As an example, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the first message in this application.

[0230] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the first message in this application.

[0231] As one embodiment, at least one of the antenna 452, the transmitter 454, the multi-antenna transmitter processor 457, the transmitter processor 468, or the controller / processor 459 is used to transmit the second message in this application.

[0232] As one embodiment, at least one of the antenna 420, the receiver 418, the multi-antenna receiving processor 472, the receiving processor 470, or the controller / processor 475 is used to receive the second message in this application.

[0233] As an example, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the third message in this application.

[0234] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the third message in this application.

[0235] As an example, at least one of the antenna 420, the transmitter 418, the multi-antenna transmitter processor 471, the transmitter processor 416, or the controller / processor 475 is used to transmit the fourth message in this application.

[0236] As one embodiment, at least one of the antenna 452, the receiver 454, the multi-antenna receiving processor 458, the receiving processor 456, or the controller / processor 459 is used to receive the fourth message in this application.

[0237] Example 5

[0238] Example 5 illustrates a wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 5 As shown. (Attached) Figure 5 In this example, the first node N51 and the second node N52 communicate via an air interface. It should be noted that the order in this example does not limit the signal transmission order or the order of implementation in this application.

[0239] for First node N51 In step S511, a first message is received; in step S512, the RRC inactive state is entered; in step S513, at least one first type signal is received; in step S514, it is determined that any condition in the first condition set is satisfied; and in step S515, the RRC idle state is entered.

[0240] for Second node N52 In step S521, a first message is sent; in step S522, at least one first type signal is sent.

[0241] In Embodiment 5, a first message is received, which is used to indicate entering an RRC inactive state; in the RRC inactive state, it is determined whether any condition in a first set of conditions is met; as a response to any condition in the first set of conditions being met, a first action is performed; wherein, the first message indicates at least one radio bearer, and the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, and at least the channel quality of a first cell is worse than a specific threshold to determine whether the first condition is met, the first cell being the serving cell of the first node; the at least one radio bearer is in an active state; the channel quality of a second cell is used to determine whether the first condition is met; wherein, the second cell is a neighboring cell of the first cell.

[0242] In Example 5, the first message indicates at least one radio bearer, which does not include a multicast MRB.

[0243] As an example, the at least one first-type signal is used to transmit data from the at least one wireless bearer.

[0244] It should be noted that the appendix Figure 5 The description only refers to the second node sending at least one type-1 signal to the first node; considering that the at least one radio bearer can be used for uplink transmission, therefore, the appendix... Figure 5 Although not shown, it does not exclude the possibility that the first node sends at least one type 1 signal to the second node.

[0245] As an example, in response to the satisfaction of any condition in the first set of conditions, the process transitions from the RRC inactive state to the RRC idle state; wherein the at least one radio bearer does not include a multicast MRB.

[0246] As a sub-implementation of the above embodiments, the at least one wireless bearer is in an active state.

[0247] As a sub-implementation of the above embodiments, the at least one wireless bearer is not in an active state.

[0248] In one embodiment, the second node is the base station of the serving cell of the first node.

[0249] As one example, the second node is the base station of the primary cell (PCell) of the first node.

[0250] As an example, the at least one wireless bearer is in an active state when receiving or sending data from the at least one wireless bearer.

[0251] As an example, when the at least one wireless bearer is not suspended, the at least one wireless bearer is in an active state.

[0252] As an example, the at least one radio bearer is in an active state when the RRC configuration of the at least one radio bearer is not released.

[0253] As an example, the at least one radio bearer is in an active state when the PDCP (Packet Data Convergence Protocol) entity corresponding to the at least one radio bearer is not suspended.

[0254] As an example, the at least one radio bearer is in an active state when the PDCP entity corresponding to the at least one radio bearer is not released.

[0255] As one embodiment, the first receiver receives at least one first type of signal, each of the at least one first type of signal including data from the at least one radio bearer.

[0256] As one embodiment, the first processor transmits at least one first type of signal, each of the at least one first type of signal including data from the at least one radio bearer.

[0257] As an example, the channel quality of the second cell is used to determine whether the first condition is met; wherein the second cell is a neighboring cell of the first cell.

[0258] As an example, the measurement for the second cell includes the measurement of the SSB (SS / PBCH block, synchronization signal / physical broadcast channel block) transmitted in the second cell.

[0259] As an example, a channel quality in the first cell that is worse than a specific threshold is used to trigger channel measurement for the second cell; wherein the frequency of the first cell and the frequency of the second cell are intra-frequency, or the frequency of the first cell and the frequency of the second cell are inter-frequency and the frequency priority of the first cell is not lower than the frequency priority of the second cell; when the channel quality of the first cell is worse than the channel quality of the second cell, it is determined that the first condition is met; wherein the specific threshold is configured by the network or pre-configured.

[0260] As an example, the channel quality of a cell is Srxlev = Q. rxlevmeas –(Q rxlevmin +Q rxlevminoffset )–P compensation –Qoffset temp ; wherein, the Q rxlevmeas The measured cell reception level value is RSRP; the Q... rxlevmin The minimum required reception level for a cell configured for the network; the Q rxlevminoffset Configured for the network for the Q rxlevmi The offset of P; compensation As compensation values, different values ​​are configured by the network for FR1 (frequency 1) and FR2 (frequency 2); the Qoffset temp This is the offset temporarily assigned to the cell.

[0261] As an example, the channel quality of a cell is Squal = Q. qualmeas –(Q qualmin +Q qualminoffset –Qoffset temp ; wherein, the Q qualmea The measured cell quality value is denoted as RSRQ; the Q... qualmin The minimum quality level required for a cell to be configured for the network; the Q qualminoffset Configured for the network for the Q qualmin The offset; the Qoffset temp This is the offset temporarily assigned to the cell.

[0262] As an example, Srxlev and Squal are respectively expressed in dB (decibels).

[0263] As an example, when the channel quality of the first cell is worse than the channel quality of the second cell, it is determined that the first condition is met; wherein, the specific threshold is the channel quality of the second cell, the at least one radio bearer indicated by the first message is in an active state, and the at least one radio bearer does not include a multicast MRB.

[0264] As an example, when the channel quality of the first cell is worse than that of the second cell, and the second cell and the first cell belong to different PLMNs (Public Land Mobile Networks) or SNPNs (Stand-alone Non-Public Networks), the first condition is determined to be met; wherein, the specific threshold is the channel quality of the second cell.

[0265] As an example, the phrase "the channel quality of the first cell is worse than the channel quality of the second cell" includes: the channel quality of the second cell is better than the channel quality of the first cell within a first time period.

[0266] As an example, the phrase "the channel quality of the first cell is worse than the channel quality of the second cell" includes: the channel quality of the second cell is higher than the channel quality of the first cell by a third threshold within a first time period.

[0267] As a sub-implementation of the above two embodiments, the frequency of the first cell and the frequency of the second cell are intra-frequency, or the frequency of the first cell and the frequency of the second cell are inter-frequency and the frequency priority of the first cell and the frequency priority of the second cell are the same.

[0268] As a sub-example of the two embodiments described above, the first node resides in the first cell for more than 1 second.

[0269] As an example, the first time length is Treselection. RAT (Wireless access technology reselection time).

[0270] As an example, the first time length is configured by the network.

[0271] As an example, the first time length is not less than 0.

[0272] As an example, the first time length is expressed in milliseconds.

[0273] As an example, the first time length is expressed in seconds.

[0274] As an example, the third threshold is configured by the network.

[0275] As an example, the third threshold is pre-configured.

[0276] As an example, the third threshold is specified.

[0277] As an example, the third threshold is expressed in dB (decibels).

[0278] As an example, the third threshold is configured for cell reselection.

[0279] As an example, the phrase "the channel quality of the first cell is worse than the channel quality of the second cell" includes: the channel quality of the first cell and the channel quality of the second cell satisfy the cell reselection conditions defined in protocol 38.304 of the 3GPP standard.

[0280] As an example, the phrase "the channel quality of the first cell is worse than the channel quality of the second cell" includes: the channel quality of the first cell and the channel quality of the second cell satisfy the conditions for inactive cell handover as defined in the 3GPP standard.

[0281] As an example, when the channel quality of the first cell is worse than a first threshold and the channel quality of the second cell is better than a second threshold, it is determined that the first condition is met; wherein, the specific threshold is the first threshold, the at least one radio bearer indicated by the first message is in an active state, and the at least one radio bearer does not include a multicast MRB.

[0282] As an example, when the channel quality of the first cell is worse than a first threshold, and the channel quality of the second cell is better than a second threshold, and the second cell and the first cell belong to different PLMNs or SNPNs, it is determined that the first condition is met; wherein, the specific threshold is the first threshold.

[0283] As an example, when the channel quality of a cell is greater than a threshold, the channel quality of the cell is better than the threshold.

[0284] As an example, the phrase "the channel quality of the first cell is worse than a first threshold and the channel quality of the second cell is better than a second threshold" includes: the channel quality of the first cell is worse than the first threshold within a second time period, and the channel quality of the second cell is better than the second threshold within a third time period.

[0285] As a sub-implementation of the above embodiments, the frequencies of the first cell and the second cell are inter-frequency, and the frequency priority of the first cell is higher than that of the second cell.

[0286] As a sub-example of the above embodiment, the first node resides in the first cell for more than 1 second.

[0287] As an example, the first threshold is Thresh. Serving,LowQ The second threshold is Thresh X,LowQ The channel quality of the first cell and the channel quality of the second channel are respectively represented by Squal.

[0288] As an example, the first threshold is Thresh. Serving,LowP The second threshold is Thresh X,LowP The channel quality of the first cell and the channel quality of the second channel are respectively represented by Srxlev.

[0289] As an example, the second time length and the third time length are respectively Treselection RAT .

[0290] As an example, the second time length and the third time length are configured by the network.

[0291] As an example, the second time length is not less than 0.

[0292] As an example, the third time length is not less than 0.

[0293] As an example, the second time length and the third time length are each expressed in milliseconds.

[0294] As an example, the second time length and the third time length are each expressed in seconds.

[0295] As one example, the first threshold and the second threshold are either network-configured or pre-configured.

[0296] As an example, the first threshold and the second threshold are respectively configured for cell reselection.

[0297] As an example, the phrase "the channel quality of the first cell is worse than a first threshold and the channel quality of the second cell is better than a second threshold" includes: the channel quality of the first cell and the channel quality of the second cell satisfy the cell reselection conditions defined in protocol 38.304 of the 3GPP standard.

[0298] As an example, the phrase "the channel quality of the first cell is worse than a first threshold and the channel quality of the second cell is better than a second threshold" includes: the channel quality of the first cell and the channel quality of the second cell satisfy the conditions for inactive cell handover as defined in the 3GPP standard.

[0299] As an example, the first message indicates at least one radio bearer, and any one of the at least one radio bearer is a DRB, and enters the RRC idle state as a response to the satisfaction of any condition in the first set of conditions.

[0300] As one embodiment, the first message indicates at least one radio bearer, and the at least one radio bearer does not include a multicast MRB, and enters the RRC idle state in response to the satisfaction of any condition in the first set of conditions.

[0301] As an example, the first message indicates that data from MBS will not be received via multicast in the RRC inactive state, and enters the RRC idle state as a response to any condition in the first set of conditions being met.

[0302] As an example, the transition from the RRC inactive state to the RRC idle state is implemented by the UE itself.

[0303] As a sub-implementation of the above embodiments, the configuration information of the at least one wireless bearer is released.

[0304] As a sub-example of the above embodiment, suspendConfig is released.

[0305] As a sub-implementation of the above embodiments, the at least one wireless bearer is released.

[0306] As a sub-implementation of the above embodiment, the upper layer is instructed to release the RRC connection.

[0307] As a sub-implementation of the above embodiments, any segments of segmented RRC messages are discarded.

[0308] As an example, the first set of conditions includes conditions for entering the RRC idle state when the RRC is inactive.

[0309] As an example, the first set of conditions includes conditions for entering the RRC idle state when the device is in an RRC inactive state and is in the process of SDT (Small Data Transmission).

[0310] Example 6

[0311] Example 6 illustrates another wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 6 As shown. (Attached) Figure 6 In this example, the first node N61 and the second node N62 communicate via an air interface. It should be noted that the order in this example does not limit the signal transmission order or the order of implementation in this application.

[0312] for First node N61 In step S611, a first message is received; in step S612, the RRC inactive state is entered; in step S613, at least one first type signal is received; in step S614, it is determined that any condition in the first condition set is satisfied; in step S615, a second message is sent; and in step S616, a third message is received.

[0313] for Second node N62 In step S621, a first message is sent; in step S622, at least one first type signal is sent; in step S623, a second message is received; and in step S624, a third message is sent.

[0314] In Embodiment 6, a first message is received, which is used to indicate entering an RRC inactive state; in the RRC inactive state, it is determined whether any condition in a first set of conditions is met; as a response to any condition in the first set of conditions being met, a first action is performed; wherein, the first message indicates at least one radio bearer, and the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, and at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the first node; the at least one radio bearer is in an active state; the channel quality of a second cell is used to determine whether the first condition is met; wherein, the second cell is a neighboring cell of the first cell; the second message is used to request the restoration of the RRC connection; wherein, the second message is sent in the first cell; as a response to sending the second message, a third message is received, which is used to indicate entering an RRC connected state; the at least one radio bearer includes a multicast MRB, which is used to transmit data from the MBS.

[0315] In Example 6, the first message indicates at least one radio bearer, which includes a multicast MRB.

[0316] As an example, the at least one radio bearer may include only a multicast MRB or the at least one radio bearer may also include a DRB.

[0317] As an example, the multicast MRB included in the at least one radio bearer is in an active state, and the multicast MRB is used to transmit data from the MBS.

[0318] As an example, the at least one first-type signal is used to transmit data from the multicast MRB.

[0319] As one example, the second message is sent in response to any condition in the first set of conditions being met.

[0320] As a sub-implementation of the above embodiments, the multicast MRB included in the at least one radio bearer is in an active state.

[0321] It should be noted that the appendix Figure 6 The description only refers to the second node sending at least one type-1 signal to the first node; considering that the at least one radio bearer can be used for uplink transmission, therefore, the appendix... Figure 6 Although not shown, it does not exclude the possibility that the first node sends at least one type 1 signal to the second node.

[0322] As an example, when the channel quality of the first cell is worse than the channel quality of the second cell, it is determined that the first condition is met; wherein, the specific threshold is the channel quality of the second cell, the at least one radio bearer includes a multicast MRB, and the multicast MRB included in the at least one radio bearer indicated by the first message is in an active state.

[0323] As an example, when the channel quality of the first cell is worse than a first threshold and the channel quality of the second cell is better than a second threshold, it is determined that the first condition is met; wherein, the specific threshold is the first threshold, the at least one radio bearer includes a multicast MRB, and the multicast MRB included in the at least one radio bearer indicated by the first message is in an active state.

[0324] As an example, the channel quality of the first cell is worse than that of the second cell; wherein the channel quality of the first cell and the channel quality of the second cell satisfy: Mn + Ofn + Ocn – Hys > Mp + Ofp + Ocp + Off; wherein the channel quality of the first cell is Mp + Ofp + Ocp; the channel quality of the second cell is Mn + Ofn + Ocn – Hys; the third threshold is Off, Mp is the measurement result of the first cell, Ofp is the object-specific offset value of the first cell, Ocp is the cell-specific offset value of the first cell; Mn is the measurement result of the second cell, Ofn is the object-specific offset value of the reference signal of the second cell, Ocn is the cell-specific offset value of the second cell, and Hys is the hysteresis parameter of this event.

[0325] As an example, when the measurement result of a cell is RSRP, Mn and Mp are expressed in dBm (decibels milliwatts); when the measurement result of a cell is RSRQ or RS-SINR, Mn and Mp are expressed in dB.

[0326] As an example, Ofn, Ocn, Ofp, Ocp, Hys, and Off are each represented in dB.

[0327] As an example, the third threshold is configured to trigger the first node to transition from an RRC inactive state to an RRC connected state.

[0328] As an example, the third threshold is configured to trigger the first node to execute a CHO in an RRC inactive state.

[0329] As an example, the phrase that the channel quality of the first cell is worse than the channel quality of the second cell includes: the channel quality of the first cell and the channel quality of the second cell meet the entering condition of A3 event defined in Protocol 38.311 of 3GPP standard.

[0330] As an example, the channel quality of the first cell satisfies Mp + Hys < Thresh1; the channel quality of the second cell satisfies Mn + Ofn + Ocn – Hys > Thresh2; where the channel quality of the first cell is Mp + Hys, the channel quality of the second cell is Mn + Ofn + Ocn – Hys, Thresh1 is the first threshold, Thresh2 is the second threshold, Mp is the measurement result of the first cell, Hys is the hysteresis parameter of this event, Mn is the measurement result of the second cell, Ofn is the offset value specific to the measurement object of the second cell, and Ocn is the cell-specific offset value of the second cell.

[0331] As an example, Thresh1 is expressed in the same unit as Mp.

[0332] As an example, Thresh2 is expressed in the same unit as Mn.

[0333] As an example, the phrase that the channel quality of the first cell is worse than the first threshold and the channel quality of the second cell is better than the second threshold includes: the channel quality of the first cell and the channel quality of the second cell meet the entering condition of A5 event defined in Protocol 38.311 of 3GPP standard.

[0334] As an example, the first threshold and the second threshold are respectively configured to trigger the first node to enter the RRC connected state from the RRC inactive state.

[0335] As an example, the first threshold and the second threshold are respectively configured to trigger the first node to perform CHO (Conditional Handover) in the RRC inactive state.

[0336] As an example, in response to any condition in the first condition set being satisfied, the second message is sent.

[0337] As an example, the second message is sent in the first cell.

[0338] As one embodiment, the phrase "the second message is sent in the first cell" includes: the second message is sent using the air interface resources of the first cell.

[0339] As an example, in response to sending the second message, a third message is received, which is used to indicate a transition from an RRC inactive state to an RRC connected state.

[0340] As one embodiment, the first message indicates at least one radio bearer, and the at least one radio bearer includes a multicast MRB, and sends a second message in response to any condition in the first set of conditions being met.

[0341] As an example, the multicast MRB is not suspended after receiving the first message.

[0342] As an example, the multicast MRB is active both before and after receiving the first message.

[0343] As one example, the second message is used to request the restoration of the RRC connection.

[0344] As an example, the second message is RRC Resume Request.

[0345] As an example, the second message is RRC Resume Request 1.

[0346] As an example, the second message indicates that the reason for requesting the restoration of the RRC connection is to receive MBS services.

[0347] As one example, the target recipient of the second message is the second node.

[0348] As an example, in response to sending the second message, a third message is received, which is used to indicate entering the RRC connection state.

[0349] As an example, the third message is an RRC signaling.

[0350] As an example, the third message is RRC Resume, which is used to indicate the restoration of the RRC connection.

[0351] As an example, the third message includes a reconfiguration field for the at least one radio bearer.

[0352] As one example, the third message includes an RRC reconfiguration field.

[0353] As an example, in response to receiving the third message, the at least one radio bearer is activated.

[0354] As an example, in response to receiving the third message, the at least one radio bearer is reconfigured.

[0355] As an example, the third message is RRCSetup (RRC Setup), which is used to indicate the establishment of an RRC connection.

[0356] As an example, SRB1 is established in response to receiving the third message.

[0357] As an example, the first receiver receives an RRC Reconfiguration message, which is used to configure the MRB included in the at least one radio bearer; wherein the reception time of the RRC Reconfiguration message is later than the reception time of the third message, which is RRCSetup.

[0358] As an example, after entering the RRC connection state, the first node reports a measurement report, and the second node instructs the first node to perform cell handover based on the measurement report.

[0359] In the above method, cell handover can be performed after transitioning from the RRC inactive state to the RRC connected state, which can effectively reduce packet loss and reduce standard complexity.

[0360] As one embodiment, the first set of conditions includes the condition that the second message is sent when the device is in an RRC inactive state and receives MBS via multicast; wherein the second message is used to request the restoration of the RRC connection.

[0361] As one embodiment, the first set of conditions includes the condition that the second message is sent when the RRC is inactive and the MBS is received via multicast; wherein the second message is used to indicate that the RRC reconfiguration is complete.

[0362] Example 7

[0363] Example 7 illustrates a third wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 7 As shown. (Attached) Figure 7 In this example, the first node N71 and the second node N72 communicate via an air interface. It should be noted that the order in this example does not limit the signal transmission order or the order of implementation in this application.

[0364] for First node N71 In step S711, a first message is received; in step S712, the RRC inactive state is entered; in step S713, at least one first type signal is received; in step S714, it is determined that any condition in the first condition set is satisfied; in step S715, a second message is sent; and in step S716, a fourth message is received.

[0365] for Second node N72 In step S721, a first message is sent; in step S722, at least one first-type signal is sent; in step S723, a second message is received; and in step S724, a fourth message is sent.

[0366] In Embodiment 7, a first message is received, which is used to indicate entering an RRC inactive state; in the RRC inactive state, it is determined whether any condition in a first set of conditions is met; as a response to any condition in the first set of conditions being met, a first action is performed; wherein, the first message indicates at least one radio bearer, and the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, and at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the first node; the at least one radio bearer is in an active state; the channel quality of a second cell is used to determine whether the first condition is met; wherein, the second cell is a neighboring cell of the first cell; as a response to sending the second message, a fourth message is received, which is used to maintain the RRC inactive state; wherein, the second message is used to request cell handover; the fourth message is used to indicate cell handover; the at least one radio bearer includes a multicast MRB, which is used to transmit data from the MBS.

[0367] In Example 7, the first message indicates at least one radio bearer, which includes a multicast MRB.

[0368] Unlike Embodiment 6, in Embodiment 7, a fourth message is received in response to sending the second message, and the fourth message is used to maintain the RRC inactive state.

[0369] As one example, the second message is used to request the restoration of the RRC connection.

[0370] As an example, the second message indicates that the reason for requesting the restoration of the RRC connection is a request for cell handover.

[0371] As one embodiment, the phrase "the second message is used to request cell handover" includes: the second message is used to request cell update.

[0372] As one example, the second message includes a second cell identifier.

[0373] As an example, the second cell identifier is used to identify the second cell.

[0374] As one embodiment, the first transmitter sends a fifth message, which includes the second cell identifier.

[0375] As an example, the fifth message and the second message belong to the same MAC PDU (Protocol Data Unit).

[0376] As an example, the fifth message and the second message belong to different MAC PDUs.

[0377] As an example, the fifth message is sent after the second message is sent.

[0378] As an example, the fifth message is an RRC signaling.

[0379] As one example, the fifth message includes UE-reported information.

[0380] As an example, the name of the fifth message includes "mobility".

[0381] As an example, the name of the fifth message includes Inactive.

[0382] As an example, the fifth message is UEAssistanceInformation (User Terminal Assistance Information).

[0383] As an example, the fifth message is VarMeasIdleReport (Idle Measurement Report Variable).

[0384] As an example, the fifth message is VarMeasInactiveReport (inactive measurement report variable).

[0385] As an example, the fifth message is VarMobilityInactiveReport (inactive mobility report variable).

[0386] As an example, the fifth message is a MAC CE (Control Element).

[0387] As an example, the logical channel identity of the MAC CE is a positive integer between 35 and 44, including 35 and 44.

[0388] As an example, the logical channel identity of the MAC CE is a positive integer between 64 and 313, including 64 and 313.

[0389] As an example, the fourth message is an RRC signaling.

[0390] As an example, the fourth message is RRCRelease, which is used to maintain the RRC inactive state.

[0391] Typically, the fourth message includes a field indicating cell handover.

[0392] As an example, the fourth message is used to indicate cell handover.

[0393] As an example, the fourth message is used to indicate cell handover in an inactive state.

[0394] As an example, the fourth message includes the suspendConfig field.

[0395] As an example, the fourth message includes the ReconfigurationwithSync field.

[0396] As an example, the fourth message includes a reconfiguration field for the at least one radio bearer, wherein the at least one radio bearer is in an active state.

[0397] As one example, the fourth message includes an RRC reconfiguration field.

[0398] As an example, the fourth message includes a reconfiguration field for the MRB included in the at least one radio bearer.

[0399] As an example, the fourth message includes a configuration message for the MRB that receives the MBS.

[0400] As an example, after acquiring the second cell, the second node sends an inactive cell handover request to the base station of the second cell, and the base station of the second cell responds with an inactive cell handover response, including sending the configuration message of the MRB of the MBS in the second cell; the second node sends the configuration message of the MRB of the MBS in the second cell to the first node in the fourth message; the first node reconfigures the MRB and starts receiving the MBS in the second cell.

[0401] Example 8

[0402] Example 8 illustrates a fourth wireless signal transmission flowchart according to an embodiment of this application, as shown in the attached diagram. Figure 8 As shown. (Attached) Figure 8 In this example, the first node N81 and the second node N82 communicate via an air interface, and the first node N81 and the third node N83 communicate via an air interface. It should be noted that the order in this example does not limit the signal transmission order or the order of implementation in this application.

[0403] for First node N81 In step S811, a first message is received; in step S812, the RRC inactive state is entered; in step S813, at least one first type signal is received; in step S814, it is determined that any condition in the first condition set is satisfied; and in step S815, a second message is sent.

[0404] for Second node N82 In step S821, a first message is sent; in step S822, at least one first type signal is sent.

[0405] for Second node N83 In step S831, the second message is received.

[0406] In embodiment 8, a first message is received, which is used to indicate entering an RRC inactive state; in the RRC inactive state, it is determined whether any condition in a first set of conditions is met; as a response to the satisfaction of any condition in the first set of conditions, a first action is performed; wherein, the first message indicates at least one radio bearer, and the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, and at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the first node; the at least one radio bearer is in an active state; the channel quality of a second cell is used to determine whether the first condition is met; wherein, the second cell is a neighboring cell of the first cell; the second message is used to indicate that RRC reconfiguration is complete; wherein, the second message is sent in the second cell, the second cell belonging to a target candidate cell set; data from the MBS is sent via multicast in any target candidate cell in the target candidate cell set; after the second message is sent, the first node maintains the RRC inactive state; the at least one radio bearer includes a multicast MRB, which is used to transmit data from the MBS.

[0407] In Example 8, the first message indicates at least one radio bearer, which includes a multicast MRB.

[0408] Unlike Embodiments 6 and 7, in Embodiment 8, the second message is sent in the second cell.

[0409] As an example, the third node is the base station of the second cell.

[0410] As an example, the third node sends the MBS via multicast.

[0411] As an example, the first node maintains the RRC inactive state after the second message is sent.

[0412] As one embodiment, the phrase "the second message is sent in the second cell" includes: the second message is sent using the air interface resources of the second cell.

[0413] As an example, the second cell belongs to the target candidate cell set, which includes at least the second cell.

[0414] As an example, the target candidate cell set includes the first cell.

[0415] As an example, data from MBS is transmitted via multicast in any of the target candidate cells in the target candidate cell set.

[0416] As an example, data transmitted via multicast is scrambled with a multicast RNTI (Radio Network Temporary Identifier).

[0417] As an example, the multicast RNTI is G-RNTI (Group-RNTI, Group Radio Network Temporary Identifier).

[0418] As an example, the multicast RNTI is G-CS-RNTI (Group Configured Scheduling RNTI).

[0419] As an example, the multicast RNTI is MCCH-RNT (MBS Control Channel-RNTI, MBS Control Channel Radio Network Temporary Identifier).

[0420] As an example, the target candidate cell set is configured by the second node.

[0421] As an example, the first message is used to configure the target candidate cell set.

[0422] As an example, the target candidate cell set is configured via system messages.

[0423] As an example, the target candidate cell set is configured via SIB (System Information Block).

[0424] As an example, the target candidate cell set is configured via dedicated RRC signaling.

[0425] As an example, the first node is in an RRC connected state when configured with the target candidate cell set, and the target candidate cell set is maintained when the first node enters the RRC inactive state.

[0426] As an example, the first node is configured to be in an RRC idle state or an RRC inactive state when it is configured to the target candidate cell set.

[0427] As an example, the first node is configured with a CHO, the CHO configuration including the target candidate cell set and the configuration of the MRB used to transmit the MBS in each target candidate cell in the target candidate cell set.

[0428] As an example, the second message is used to indicate that the RRC reconfiguration is complete.

[0429] As an example, the second message is RRCReconfigurationComplete (RRC reconfiguration complete).

[0430] As one example, the second message is sent during the random access process.

[0431] As an example, the second message is included in Msg3 (message 3) of the random access procedure; wherein the random access procedure is a 4-step random access procedure.

[0432] As an example, the second message is included in MsgA (message A) of the random access procedure; wherein the random access procedure is a 2-step random access procedure.

[0433] As one example, the second message includes a first identifier.

[0434] As one embodiment, the first transmitter sends a sixth message, the sixth message including the first identifier.

[0435] As an example, the second message and the sixth message belong to the same MAC PDU.

[0436] As an example, the second message and the sixth message belong to different MAC PDUs.

[0437] As an example, the first identifier is used to identify the first node in the second cell.

[0438] As an example, the first identifier is used to identify the first node in the target candidate cell set.

[0439] As an example, the first identifier is used to identify the MBS.

[0440] As an example, the first identifier is used to identify the MBS in the second cell.

[0441] As an example, the first identifier is C-RNTI (Cell-RNTI, Temporary Identifier for Cell Radio Network).

[0442] As an example, the first flag is MBS-RNTI (Multicast Radio Network Temporary Identifier).

[0443] As an example, the first identifier is G-RNTI.

[0444] As an example, the sixth message is a MAC CE.

[0445] As an example, the logical channel identity of the MAC CE is a positive integer between 35 and 44, including 35 and 44.

[0446] As an example, the logical channel identity of the MAC CE is a positive integer between 64 and 313, including 64 and 313.

[0447] As an example, the sixth message is an RRC signaling.

[0448] Example 9

[0449] Example 9 illustrates a schematic diagram of the positional relationship between a first cell and a second cell according to an embodiment of this application, as shown in the attached diagram. Figure 9 As shown.

[0450] As one example, the second cell is a neighboring cell of the first cell.

[0451] As a sub-implementation of the above embodiments, the coverage areas of the first cell and the second cell do not overlap in at least a portion.

[0452] As one embodiment, the phrase "the second cell is a neighboring cell of the first cell" includes: the coverage area of ​​the first cell includes the coverage area of ​​the second cell; wherein, the second cell is a micro cell and the first cell is a macro cell.

[0453] As one embodiment, the phrase "the second cell is a neighboring cell of the first cell" includes: the coverage area of ​​the second cell includes the coverage area of ​​the first cell; wherein, the first cell is a micro cell and the second cell is a macro cell.

[0454] It should be noted that the macro cells and micro cells in the above two embodiments are mainly used to distinguish the size of the coverage area; wherein, the coverage area of ​​a macro cell includes the coverage area of ​​a micro cell; that is, when the coverage area of ​​the first cell includes the coverage area of ​​the second cell, the first cell is a macro cell and the second cell is a micro cell; conversely, when the coverage area of ​​the second cell includes the coverage area of ​​the first cell, the second cell is a macro cell and the first cell is a micro cell.

[0455] In Case A of Example 8, the first cell and the second cell are adjacent and the coverage of one cell does not completely include the coverage of the other cell; in Case B of Example 8, the coverage service of the first cell includes the coverage of the second cell; in Case C of Example 8, the coverage service of the second cell includes the coverage of the first cell.

[0456] Example 10

[0457] Example 10 illustrates a structural block diagram of a processing apparatus in a first node according to an embodiment of this application, as shown in the attached diagram. Figure 10 As shown. In the appendix Figure 10 In the first node 1000, the processing device includes a first receiver 1001 and a first processor 1002; the first node 1000 is a UE.

[0458] In Example 10, a first receiver 1001 receives a first message, which is used to indicate entering an RRC inactive state; a first processor 1002 determines whether any condition in a first set of conditions is met in the RRC inactive state; and executes a first action as a response to the satisfaction of any condition in the first set of conditions; wherein, the first message indicates at least one radio bearer, and the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, and at least the channel quality of a first cell is worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the first node.

[0459] As an example, the at least one wireless bearer is in an active state.

[0460] As an example, the channel quality of the second cell is used to determine whether the first condition is met; wherein the second cell is a neighboring cell of the first cell.

[0461] As an example, the channel quality of the second cell is used to determine whether the first condition is met; wherein, the second cell is a neighboring cell of the first cell; the second message is used to indicate that the RRC reconfiguration is complete; wherein, the second message is sent in the second cell, which belongs to the target candidate cell set; data from the MBS is sent via multicast in any target candidate cell in the target candidate cell set; after the second message is sent, the first node maintains the RRC inactive state.

[0462] As one embodiment, the second message is used to request the restoration of the RRC connection; wherein the second message is sent in the first cell.

[0463] As an example, the first receiver 1001 receives a third message in response to sending the second message, the third message being used to indicate entering the RRC connection state.

[0464] As one embodiment, the first receiver 1001 receives a fourth message in response to sending the second message, the fourth message being used to maintain the RRC inactive state; wherein the second message is used to request cell handover; and the fourth message is used to indicate cell handover.

[0465] As an example, the at least one radio bearer includes a multicast MRB, which is used to transmit the data from the MBS.

[0466] As one embodiment, the first receiver 1001 includes the appendix to this application. Figure 4 The receiver 454 (including antenna 452), receiver processor 456, multi-antenna receiver processor 458, and controller / processor 459 are included.

[0467] As one embodiment, the first receiver 1001 includes the appendix to this application. Figure 4 The receiver 454 (including antenna 452), the receiver processor 456, the multi-antenna receiver processor 458, or the controller / processor 459 are at least one of them.

[0468] As one embodiment, the first processor 1002 includes the appendix to this application. Figure 4 The controller / processor in the 459.

[0469] As one embodiment, the first processor 1002 includes the appendix to this application. Figure 4 The transmitter 454 (including antenna 452), the transmitter processor 468, the multi-antenna transmitter processor 457, and the controller / processor 459 are included.

[0470] As one embodiment, the first processor 1002 includes the appendix to this application. Figure 4 The transmitter 454 (including antenna 452), the transmitter processor 468, the multi-antenna transmitter processor 457, or the controller / processor 459 are at least one of them.

[0471] Example 11

[0472] Example 11 illustrates a structural block diagram of a processing apparatus in a second node according to an embodiment of this application, as shown in the attached diagram. Figure 11 As shown. In the appendix Figure 11In the second node 1100, the processing device includes a second receiver 1101 and a second transmitter 1102; the second node 1100 is a base station.

[0473] In Example 11, a second transmitter 1102 sends a first message, which is used to indicate entering an RRC inactive state; wherein, the receiver of the first message determines whether any condition in a first set of conditions is met in the RRC inactive state; as a response to any condition in the first set of conditions being met, a first action is performed by the receiver of the first message; wherein, the first message indicates at least one radio bearer, and the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, and at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the receiver of the first message.

[0474] As an example, the at least one wireless bearer is in an active state.

[0475] As an example, the channel quality of the second cell is used to determine whether the first condition is met; wherein the second cell is a neighboring cell of the first cell.

[0476] As one embodiment, the second receiver 1101 receives the second message, which is used to request the restoration of the RRC connection.

[0477] As an example, the second message is sent in the first cell, which is the cell maintained by the second node.

[0478] As one embodiment, the second transmitter 1102, in response to receiving the second message, sends a third message, which is used to indicate entering the RRC connection state.

[0479] As one embodiment, the second transmitter 1102, in response to receiving the second message, sends a fourth message, which is used to maintain the RRC inactive state; wherein the second message is used to request cell handover; and the fourth message is used to indicate cell handover.

[0480] As an example, the at least one radio bearer includes a multicast MRB, which is used to transmit the data from the MBS.

[0481] As one embodiment, the second receiver 1101 includes the appendix to this application. Figure 4The receiver 418 (including antenna 420), receiver processor 470, multi-antenna receiver processor 472, and controller / processor 475 are included.

[0482] As one embodiment, the second receiver 1101 includes the appendix to this application. Figure 4 The receiver 418 (including antenna 420), receiver processor 470, multi-antenna receiver processor 472, or controller / processor 475 are at least one of them.

[0483] As one embodiment, the second transmitter 1102 includes the appendix to this application. Figure 4 The transmitter 418 (including antenna 420), the transmitter processor 416, the multi-antenna transmitter processor 471, and the controller / processor 475 are included.

[0484] As one embodiment, the second transmitter 1102 includes the appendix to this application. Figure 4 The transmitter 418 (including antenna 420), the transmitter processor 416, the multi-antenna transmitter processor 471, or the controller / processor 475 are at least one of them.

[0485] Example 12

[0486] Example 12 illustrates a structural block diagram of a processing apparatus in a third node according to an embodiment of this application, as shown in the attached diagram. Figure 12 As shown. In the appendix Figure 12 In the process, the processing device in the third node 1200 includes a third receiver 1201; the third node 1200 is a base station.

[0487] In embodiment 12, the third receiver 1201 receives a second message, which is used to indicate that the RRC reconfiguration is complete; wherein, the second message is sent in a second cell, which belongs to the target candidate cell set; and data from the MBS is sent via multicast in any target candidate cell in the target candidate cell set.

[0488] As an example, the second cell is the cell maintained by the third node.

[0489] As one embodiment, a first message is sent, the first message being used to indicate entering an RRC inactive state; the receiver of the first message determines whether any condition in a first set of conditions is met in the RRC inactive state; as a response to any condition in the first set of conditions being met, a first action is performed by the receiver of the first message; wherein, the first message indicates at least one radio bearer, the first message being used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first set of conditions includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold being used to determine whether the first condition is met, the first cell being the serving cell of the receiver of the first message.

[0490] As an example, the at least one wireless bearer is in an active state.

[0491] As an example, the channel quality of the second cell is used to determine whether the first condition is met; wherein, the second cell is a neighboring cell of the first cell.

[0492] As an example, after the second message is sent, the recipient of the first message remains in an RRC inactive state.

[0493] As an example, the at least one radio bearer includes a multicast MRB, which is used to transmit the data from the MBS.

[0494] As one embodiment, the third receiver 1201 includes the appendix to this application. Figure 4 The receiver 418 (including antenna 420), receiver processor 470, multi-antenna receiver processor 472, and controller / processor 475 are included.

[0495] As one embodiment, the third receiver 1201 includes the appendix to this application. Figure 4 The receiver 418 (including antenna 420), receiver processor 470, multi-antenna receiver processor 472, or controller / processor 475 are at least one of them.

[0496] Those skilled in the art will understand that all or part of the steps in the above methods can be implemented by a program instructing related hardware, and the program can be stored in a computer-readable storage medium, such as a read-only memory, hard disk, or optical disk. Optionally, all or part of the steps in the above embodiments can also be implemented using one or more integrated circuits. Correspondingly, each module unit in the above embodiments can be implemented in hardware or in the form of software functional modules. This application is not limited to any specific combination of software and hardware. The first type of communication node or UE or terminal in this application includes, but is not limited to, mobile phones, tablets, laptops, network cards, low-power devices, eMTC (enhanced Machine Type Communication) devices, NB-IoT devices, vehicle communication devices, aircraft, drones, remote-controlled aircraft, and other wireless communication devices. The second type of communication node or base station or network-side equipment in this application includes, but is not limited to, macrocell base stations, microcell base stations, home base stations, relay base stations, eNBs, gNBs, Transmission and Reception Points (TRPs), relay satellites, satellite base stations, airborne base stations, and testing equipment, such as transceivers simulating some functions of a base station, signaling testers, and other wireless communication equipment.

[0497] Those skilled in the art will understand that the present invention can be practiced in other specified forms without departing from its core or essential characteristics. Therefore, the embodiments disclosed herein should in any way be considered descriptive rather than restrictive. The scope of the invention is defined by the appended claims rather than the foregoing description, and all modifications within their equivalent meaning and scope are considered to be included therein.

Claims

1. A first node used for wireless communication, characterized in that, include: A first receiver receives a first message, which is used to indicate entering an RRC inactive state. The first processor determines whether any condition in the first set of conditions is met in the RRC inactive state; and executes a first action in response to any condition in the first set of conditions being met. Wherein, the first message indicates at least one radio bearer, the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first condition set includes at least a first condition, at least the channel quality of the first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the first node.

2. The first node according to claim 1, characterized in that, At least one wireless bearer is in an active state.

3. The first node according to claim 1 or 2, characterized in that, The channel quality of the second cell is used to determine whether the first condition is met; The second cell is a neighboring cell of the first cell.

4. The first node according to claim 3, characterized in that, The second message is used to indicate that the RRC reconfiguration is complete; The second message is sent in the second cell, which belongs to the target candidate cell set; data from the MBS is sent via multicast in any target candidate cell in the target candidate cell set; after the second message is sent, the first node maintains the RRC inactive state.

5. The first node according to any one of claims 1 to 3, characterized in that, The second message is used to request the restoration of the RRC connection; The second message is sent in the first cell.

6. The first node according to claim 5, characterized in that, include: The first receiver, in response to sending the second message, receives a third message, which is used to indicate entering the RRC connection state.

7. The first node according to claim 5, characterized in that, include: The first receiver, in response to sending the second message, receives a fourth message, which is used to maintain the RRC inactive state; The second message is used to request cell handover; the fourth message is used to indicate cell handover.

8. The first node according to any one of claims 4 to 7, characterized in that, The at least one radio bearer includes a multicast MRB, which is used to transmit the data from the MBS.

9. A second node used for wireless communication, characterized in that, include: The second transmitter sends a first message, which is used to indicate entering the RRC inactive state; Wherein, the recipient of the first message determines whether any condition in the first condition set is met in the RRC inactive state; in response to any condition in the first condition set being met, a first action is performed by the recipient of the first message; wherein, the first message indicates at least one radio bearer, the first message is used to determine whether the first action is to enter the RRC idle state or to send a second message, the second message being RRC signaling; the first condition set includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the recipient of the first message.

10. The second node according to claim 9, characterized in that, At least one wireless bearer is in an active state.

11. The second node according to claim 9 or 10, characterized in that, The channel quality of the second cell is used to determine whether the first condition is met; wherein the second cell is a neighboring cell of the first cell.

12. The second node according to any one of claims 9 to 11, characterized in that, The second receiver receives the second message, which is used to request the restoration of the RRC connection.

13. The second node according to claim 12, characterized in that, In response to receiving the second message, the second transmitter sends a third message, which is used to indicate entering the RRC connection state.

14. The second node according to any one of claims 9 to 13, characterized in that, In response to receiving the second message, the second transmitter sends a fourth message, which is used to maintain the RRC inactive state; wherein the second message is used to request cell handover; and the fourth message is used to indicate cell handover.

15. The second node according to any one of claims 9 to 14, characterized in that, The at least one radio bearer includes a multicast MRB, which is used to transmit data from the MBS.

16. A method used in a first node of wireless communication, characterized in that, include: Receive a first message, which is used to indicate entering an RRC inactive state; In the RRC inactive state, determine whether any condition in the first set of conditions is satisfied; In response to the fulfillment of any condition in the first set of conditions, execute the first action; Wherein, the first message indicates at least one radio bearer, the first message is used to determine whether the first action is to enter an RRC idle state or to send a second message, the second message being RRC signaling; the first condition set includes at least a first condition, at least the channel quality of the first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the first node.

17. The method in the first node according to claim 16, characterized in that, At least one wireless bearer is in an active state.

18. The method in the first node according to claim 16 or 17, characterized in that, The channel quality of the second cell is used to determine whether the first condition is met; The second cell is a neighboring cell of the first cell.

19. The method in the first node according to any one of claims 16 to 18, characterized in that, The second message is used to indicate that the RRC reconfiguration is complete; The second message is sent in the second cell, which belongs to the target candidate cell set; data from the MBS is sent via multicast in any target candidate cell in the target candidate cell set; after the second message is sent, the first node maintains the RRC inactive state.

20. The method in the first node according to any one of claims 16 to 19, characterized in that, The second message is used to request the restoration of the RRC connection; The second message is sent in the first cell.

21. The method in the first node according to any one of claims 16 to 20, characterized in that, In response to sending the second message, a third message is received, which is used to indicate entering the RRC connection state.

22. The method in the first node according to any one of claims 16 to 21, characterized in that, In response to sending the second message, a fourth message is received, which is used to maintain the RRC inactive state; The second message is used to request cell handover; the fourth message is used to indicate cell handover.

23. The method in the first node according to claim 22, characterized in that, The at least one radio bearer includes a multicast MRB, which is used to transmit the data from the MBS.

24. A method used in a second node of wireless communication, characterized in that, include: Send a first message, which is used to indicate entering an RRC inactive state; Wherein, the recipient of the first message determines whether any condition in the first condition set is met in the RRC inactive state; in response to any condition in the first condition set being met, a first action is performed by the recipient of the first message; wherein, the first message indicates at least one radio bearer, the first message is used to determine whether the first action is to enter the RRC idle state or to send a second message, the second message being RRC signaling; the first condition set includes at least a first condition, at least a channel quality of a first cell being worse than a specific threshold is used to determine whether the first condition is met, the first cell being the serving cell of the recipient of the first message.

25. The method in the second node according to claim 24, characterized in that, At least one wireless bearer is in an active state.

26. The method in the second node according to claim 24 or 25, characterized in that, The channel quality of the second cell is used to determine whether the first condition is met; The second cell is a neighboring cell of the first cell.

27. The method in the second node according to any one of claims 24 to 26, characterized in that, The second message is received, which is used to request the restoration of the RRC connection.

28. The method in the second node according to any one of claims 24 to 27, characterized in that, In response to receiving the second message, a third message is sent, which is used to indicate entering the RRC connection state.

29. The method in the second node according to any one of claims 24 to 28, characterized in that, In response to receiving the second message, a fourth message is sent, which is used to maintain the RRC inactive state; wherein the second message is used to request cell handover; and the fourth message is used to indicate cell handover.

30. The method in the second node according to any one of claims 24 to 29, characterized in that, The at least one radio bearer includes a multicast MRB, which is used to transmit data from the MBS.

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