CN117014976A

CN117014976A - Cell switching method, device, terminal and network side equipment

Info

Publication number: CN117014976A
Application number: CN202210468975.1A
Authority: CN
Inventors: 宋二浩
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-11-07
Also published as: WO2023208048A1

Abstract

The application discloses a cell switching method, a device, a terminal and network side equipment, belonging to the field of mobile communication, wherein the cell switching method of the embodiment of the application comprises the following steps: under the condition that the terminal is switched between layer 1 and layer 2 of a first cell group, the terminal acquires a target RRC signaling carrying first indication information; the first indication information is used for indicating the configuration of the terminal application associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in the RRC signaling received subsequently.

Description

Cell switching method, device, terminal and network side equipment

Technical Field

The application belongs to the technical field of mobile communication, and particularly relates to a cell switching method, a cell switching device, a terminal and network side equipment.

Background

A New air interface (New Radio) access network splits a base station, such as a gNB, into a Central Unit (CU) and a Distributed Unit (DU), and connects the base station with the Distributed Unit through an F1 interface. One gNB contains only one CU, one or more DUs, one DU corresponding to 1 or more cells (cells). The CU contains a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer and the following protocol stacks, such as a PDCP layer and a radio resource control (Radio Resource Control, RRC) layer. The DUs contain protocol stacks below the PDCP layer, such as radio link control (Radio Link Control, RLC) layer, medium access control (Medium Access Control, MAC) layer, physical (PHY) layer.

When a terminal, also called user equipment (UserEquipment, UE), performs a layer 1 or layer 2 (Intra-DU L1/L2) handover in a distributed unit, the MAC layer of the UE may not be reset after the handover is completed in order to ensure that data is not interrupted. However, since radio resource control (Radio Resource Control, RRC) signaling from the source cell may remain in the buffer (MAC) of the UE, and the UE has been handed over to the target cell, an error may occur in applying the configuration in the RRC signaling of the source cell.

Disclosure of Invention

The embodiment of the application provides a cell switching method, a cell switching device, a terminal and network side equipment, which can solve the problem of configuration in RRC signaling of a possible application source cell when UE (user equipment) is switched to a target cell.

In a first aspect, a cell handover method is provided, applied to a terminal, and the method includes:

under the condition that the terminal is switched between layer 1 and layer 2 of a first cell group, the terminal acquires a target RRC signaling carrying first indication information; the first indication information is used for indicating the configuration of the terminal application associated with the first cell group in the target RRC signaling and the configuration of the terminal application associated with the first cell group in the RRC signaling received subsequently.

In a second aspect, a cell switching apparatus is provided, including:

an execution module, configured to execute layer 1 or layer 2 handover of the first cell group;

the configuration module is used for acquiring a target RRC signaling carrying first indication information; the first indication information is used for indicating the configuration which is applied in the target RRC signaling and is associated with the first cell group, and the configuration which is applied in the RRC signaling which is received subsequently and is associated with the first cell group.

In a third aspect, a cell handover method is provided, applied to a network side device, and the method includes:

the network side equipment initiates layer 1 or layer 2 switching of the first cell group to the terminal;

the network side equipment sends a target RRC signaling to the terminal after determining that the layer 1 or layer 2 switching execution of the first cell group is completed; the target RRC signaling carries first indication information, and the first indication information is used for indicating the configuration of the terminal application in the target RRC signaling and associated with the first cell group, and the configuration of the follow-up sent RRC signaling and associated with the first cell group.

In a fourth aspect, a cell switching apparatus is provided, including:

the first transmission module is used for initiating layer 1 or layer 2 switching of the first cell group to the terminal;

A second transmission module, configured to send a target RRC signaling to the terminal after determining that layer 1 or layer 2 handover execution of the first cell group is completed; the target RRC signaling carries first indication information, and the first indication information is used for indicating the configuration of the terminal application in the target RRC signaling and associated with the first cell group, and the configuration of the follow-up sent RRC signaling and associated with the first cell group.

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to perform layer 1 or layer 2 handover of a first cell group, and the communication interface is configured to obtain target RRC signaling carrying first indication information.

In a seventh aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which program or instructions when executed by the processor implement the steps of the method as described in the first aspect.

An eighth aspect provides a network side device, including a processor and a communication interface, where the processor is configured to determine that layer 1 or layer 2 handover execution of the first cell group is completed, and the communication interface is configured to initiate layer 1 or layer 2 handover of the first cell group to a terminal; and after the layer 1 or layer 2 switching execution of the first cell group is determined, transmitting a target RRC signaling to the terminal.

In a ninth aspect, a cell handover system is provided, including: a terminal and a network side device, the terminal being operable to perform the steps of the cell handover method as described in the first aspect, the network side device being operable to perform the steps of the cell handover method as described in the third aspect.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect, or performs the steps of the method according to the third aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface, the communication interface and the processor being coupled, the processor being for running a program or instructions to implement the method according to the first aspect or to implement the method according to the third aspect.

In a twelfth aspect, there is provided a computer program/program product stored in a storage medium, the computer program/program product being executed by at least one processor to implement the cell handover method according to the first aspect, or to implement the steps of the cell handover method according to the third aspect.

In the embodiment of the application, under the condition that the layer 1 or the layer 2 of the first cell group is switched, the target RRC signaling carrying the first indication information is obtained, wherein the first indication information is used for indicating the configuration of the terminal, which is applied in the target RRC signaling and is associated with the first cell group, and the configuration, which is subsequently received, in the RRC signaling and is associated with the first cell group, so that the error caused by the configuration in the RRC signaling of the application source cell is avoided after the terminal is switched to the target cell.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a schematic flow chart of a cell handover method according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of a cell switching device according to an embodiment of the present application;

fig. 4 is a flowchart of another cell handover method according to an embodiment of the present application;

Fig. 5 is a schematic structural diagram of another cell switching apparatus according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 7 is a schematic structural diagram of a terminal implementing an embodiment of the present application;

fig. 8 is a schematic structural diagram of a network side device for implementing an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It is noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/evolution of LTE (LTE-Advanced, LTE-a) systems, may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single-carrier frequency division multiple access (SC-carrier FrequencyDivision Multiple Access, FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a new air interface (NR) system for purposes of example and uses NR terminology in much of the description that follows, but these techniques are also applicable to applications other than NR system applications, such as generation 6 (6) ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network device 12. The terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm top, a netbook, an ultra-mobile personal Computer (ultra-mobile personal Computer, UMPC), a mobile internet appliance (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or a furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The network-side device 12 may comprise an access network device or a core network device, wherein the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a radio access network element. Access network device 12 may include a base station, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmitting/receiving point (TransmittingReceivingPoint, TRP), or some other suitable terminology in the art, a WLAN access point, a WiFi node, etc., and is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited. The core network device may include, but is not limited to, at least one of: a core network node, a core network function, a mobility management entity (Mobility Management Entity, MME), an access mobility management function (Access and Mobility Management Function, AMF), a session management function (Session Management Function, SMF), a user plane function (User Plane Function, UPF), a policy control function (Policy Control Function, PCF), a policy and charging rules function (Policy and Charging Rules Function, PCRF), an edge application service discovery function (EdgeApplicationServerDiscoveryFunction, EASDF), unified data management (Unified Data Management, UDM), unified data repository (Unified Data Repository, UDR), a home subscriber server (Home Subscriber Server, HSS), a centralized network configuration (Centralized network configuration, CNC), a network storage function (Network Repository Function, NRF), a network opening function (NetworkExposureFunction, NEF), a local NEF (LocalNEF, or L-NEF), a binding support function (Binding Support Function, BSF), an application function (Application Function, AF), and the like. It should be noted that, in the embodiment of the present application, only the core network device in the NR system is described as an example, and the specific type of the core network device is not limited.

The cell switching method, the device, the terminal and the network side equipment provided by the embodiment of the application are described in detail through some embodiments and application scenes thereof by combining the attached drawings.

As shown in fig. 2, an embodiment of the present application provides a cell handover method, where the execution body of the method is a terminal, in other words, the method may be executed by software or hardware installed in the terminal. The method comprises the following steps.

S210, under the condition that the terminal is switched between a layer 1 and a layer 2 of a first cell group, the terminal acquires a target RRC signaling carrying first indication information; the first indication information is used for indicating the configuration of the terminal application associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in the RRC signaling received subsequently.

In one embodiment, the terminal may receive a layer 1 or layer 2 (L1/L2) handover command of the first cell group, perform an L1/L2 handover procedure, and switch from a source cell to a target cell.

It should be appreciated that based on the dual connectivity (Dual Connectivity, DC) technology, two network nodes, i.e. resources of the access network device, are provided for the UE, one of which is called Master Node (MN) and the other one of which is called Secondary Node (SN). At each network node, a carrier aggregation technique (Carrier Aggregation, CA) is used, i.e. a series of serving cells controlled by the node are configured for the UE, called Cell Group (CG). The master node controls the master cell group (Master Cell Group, MCG) and the slave node controls the slave cell group (Secondary Cell Group, SCG). Each Cell group contains a Special Cell (SpCell) and a series of Secondary cells (scells). The special Cell is called a Primary Cell (PCell) in the MCG, and the special Cell is called a Primary secondary Cell (PSCell, primary Secondary Cell) in the SCG. SpCell uses the primary carrier in one cell group, while other secondary cells use the secondary carrier, and resource scheduling within one cell group is performed by SpCell.

As described above, the first cell group may be MCG or SCG. The L1/L2 switching process for the MCG is used for switching the primary cell, and the L1/L2 switching process for the SCG is used for switching the primary cell and the secondary cell.

After the L1/L2 handover of the first cell group is completed, the terminal may invoke the received RRC signaling from the MACbuffer, where the RRC signaling may include RRC signaling received before or during the terminal performs the L1/L2 handover of the first cell group, that is, RRC signaling of the source cell, and RRC signaling received after the handover is completed, that is, RRC signaling of the target cell.

For the RRC signaling received before or during the L1/L2 switching, the configuration associated with the first cell group is configured corresponding to the source cell. In order to avoid that the configuration corresponding to the source cell is still applied after the handover is completed, in one embodiment, before the target RRC signaling is acquired, the method further includes:

after starting to perform layer 1 or layer 2 handover of the first cell group, the terminal discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configuration associated with other cell groups except the first cell group. For example, if the first cell group is MCG, the terminal discards the configuration associated with MCG in the acquired RRC signaling, and if the first cell group is SCG, the terminal discards the configuration associated with SCG in the acquired RRC signaling. For simplicity, the configuration associated with the first cell group may be referred to as configuration B and the configuration associated with the other cell groups as configuration a in the following embodiments.

And until the terminal acquires the target RRC signaling, applying the configuration B in the target RRC signaling and the configuration B in the RRC signaling received subsequently based on the first indication information carried by the target RRC signaling. After acquiring the target RRC signaling, the terminal applies all configuration parameters in the target RRC signaling and the RRC signaling received subsequently.

It should be understood that, after determining that the L1/L2 handover execution of the first cell group is completed, the network side device will send the target RRC signaling carrying the first indication information to the terminal. The target RRC signaling sent by the network side device may specifically carry the first indication information for a first RRC signaling sent to the terminal after determining that the L1/L2 handover execution of the first cell group is completed.

It should be understood that the terminal may identify the cell group associated with the corresponding configuration according to a cell Identification (ID) or cell group identification (CellGroupID) carried in the RRC signaling. If the carried cell identification belongs to the first cell group or the carried cell group identification is the identification of the first cell group, determining the configuration as the configuration B; otherwise, it is determined as configuration a.

Optionally, after completing the L1/L2 handover of the first cell group, the terminal may further obtain a non-access stratum (Non Access Stratum, NAS) message from the MACbuffer, and before obtaining the target RRC signaling, the method further includes: under the condition that the first cell group is MCG, the terminal discards and acquires NAS information; and in case the first cell group is SCG, the terminal applies the NAS message.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, under the condition that layer 1 or layer 2 handover of a first cell group occurs, a target RRC signaling carrying first indication information is obtained, where the first indication information is used to indicate that the terminal applies configuration associated with the first cell group in the target RRC signaling, and subsequently received configuration associated with the first cell group in the RRC signaling, so that after the terminal switches to a target cell, errors caused by configuration in the RRC signaling of an application source cell are avoided.

Based on the above embodiment, optionally, after the terminal discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configuration associated with the cell group other than the first cell group, the method further includes:

and the terminal sends an RRC reconfiguration completion message to the network side equipment.

After the terminal completes the L1/L2 switching of the first cell group, if the configuration B exists in the obtained RRC message, the configuration B in the RRC message is abandoned, and the configuration A in the RRC message is applied. And then replying an RRC reconfiguration complete message to the network side equipment, wherein the RRC reconfiguration complete message is used for notifying the network side equipment of partially configuring the characteristics of the non-applied and/or non-applied configuration and/or the reason information of the non-applied configuration.

In one embodiment, the RRC reconfiguration complete message carries indication information, where the indication information is used to indicate at least one of the following:

part of the configuration in the RRC signaling is not applied;

part of the configuration in the RRC signaling is applied;

the configuration associated with the first cell group in the RRC signaling is not applied;

the configuration of other cell group associations in the RRC signaling except the first cell group is applied;

the reason information that is not applied.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, after the terminal discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configuration associated with the cell group other than the first cell group, an RRC reconfiguration complete message is replied to the network side device, where the configuration is used to notify the network side device that part of the configuration is not applied, so that the network side device sends the target RRC signaling, and therefore, after the terminal switches to the target cell, the terminal can timely apply the configuration in the RRC signaling of the target cell.

Based on the above embodiment, optionally, the first indication information is configured based on at least one of:

the terminal, i.e., the first indication information, may be configured separately for each terminal (per UE);

A target signaling radio bearer (Signalling Radio Bearer, SRB), i.e. the first indication information may be configured separately for each signaling radio bearer (perSRB);

the target Logical Channel (LCH), i.e. the first indication information, may be configured separately for each Logical Channel (per LCH).

In an embodiment, in the case that the first indication information is configured by the per UE, the first indication information is used to indicate that the corresponding terminal stops dropping the target RRC signaling and the configuration B in the subsequent RRC signaling, that is, applies all configuration parameters in the target RRC signaling and the subsequent RRC signaling, that is, the configuration a and the configuration B, until the L1/L2 handover is performed again.

And under the condition that the first indication information is configured based on the terminal, namely after the terminal acquires the target RRC signaling carrying the first indication information corresponding to the terminal, stopping discarding the configuration of the target RRC signaling and the first cell group in the subsequent RRC signaling, namely, applying the configuration associated with all cell groups in the target RRC signaling and the configuration associated with all cell groups in the subsequently received RRC signaling, until the L1/L2 switching is executed again.

In another embodiment, if the first indication information is configured in per SRB or per LCH, if the first indication information corresponds to a target SRB or target LCH, the first indication information is used to instruct the terminal to stop discarding configuration B in the target RRC signaling and RRC signaling received through the target SRB or target LCH, that is, to apply all configuration parameters in the target RRC signaling and RRC signaling received through the target SRB or target LCH until L1/L2 handover is performed again.

In the case that the first indication information is configured based on the target signaling radio bearer or the target logic channel, after acquiring the target RRC signaling carrying the first indication information, the terminal applies the configuration of all cell group associations in the target RRC signaling, and the configuration of all cell group associations in the RRC signaling received through the target signaling radio bearer or the target logic channel later until L1/L2 handover is performed again.

Correspondingly, for the network side device, in an implementation manner, when the first indication information is configured based on the terminal, the network side device carries the first indication information in a first RRC signaling sent to the terminal after determining that the L1/L2 handover execution of the first cell group is completed.

In another embodiment, in the case that the first indication information is configured based on the target signaling radio bearer or the target logical channel, the network side device carries the first indication information in a first RRC signaling sent to the terminal through the target signaling radio bearer or the target logical channel after determining that the L1/L2 handover of the first cell group is performed.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, the first indication information may be configured based on a terminal, a signaling radio bearer, or a logical channel, so that the terminal realizes flexible configuration after switching to a target cell.

In the cell switching method provided by the embodiment of the application, the execution main body can be a cell switching device. In the embodiment of the application, a method for executing cell switching by a cell switching device is taken as an example, and the cell switching device provided by the embodiment of the application is described.

As shown in fig. 3, the cell switching apparatus includes: an execution module 301 and a configuration module 302.

The executing module 301 is configured to execute layer 1 or layer 2 handover of the first cell group; the configuration module 302 is configured to obtain a target RRC signaling carrying first indication information; the first indication information is used for indicating the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in the RRC signaling received subsequently.

Optionally, the configuration module 302 is further configured to discard the configuration associated with the first cell group in the acquired RRC signaling after starting to perform the layer 1 or layer 2 handover of the first cell group, and apply the configuration associated with other cell groups except the first cell group.

Optionally, the first cell group is MCG or SCG.

The configuration module 302 is further configured to, prior to acquiring the target RRC signaling:

discarding the acquired NAS message under the condition that the first cell group is MCG;

or,

and applying the acquired NAS message under the condition that the first cell group is SCG.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, after performing layer 1 or layer 2 handover of a first cell group, a target RRC signaling carrying first indication information is obtained, where the first indication information is used to indicate configuration associated with the first cell group in the target RRC signaling and configuration associated with the first cell group in subsequently received RRC signaling, so that after the cell handover device switches to a target cell, errors caused by configuration in RRC signaling of an application source cell are avoided.

Based on the above embodiment, optionally, the configuration module 302 is further configured to send an RRC reconfiguration complete message to the network side device.

Optionally, the RRC reconfiguration complete message carries second indication information, where the second indication information is used to indicate at least one of the following:

part of the configuration in the RRC signaling is not applied;

Part of the configuration in the RRC signaling is applied;

the reason information that is not applied.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, after the cell switching device discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configuration associated with other cell groups except the first cell group, an RRC reconfiguration complete message is replied to the network side device, where the configuration is notified to the network side device that the configuration is not applied, so that the network side device sends the target RRC signaling, and therefore, after the cell switching device switches to the target cell, the cell switching device can timely apply the configuration in the RRC signaling of the target cell.

the cell switching device;

a target signaling radio bearer;

a target logical channel.

Optionally, in the case that the first indication information is configured based on the cell switching device, after acquiring the target RRC signaling carrying the first indication information, the configuration module 302 is further configured to configure all cell group associations in the target RRC signaling, and configure all cell group associations in the subsequently received RRC signaling.

Optionally, in the case that the first indication information is configured based on the target signaling radio bearer or the target logical channel, after obtaining the target RRC signaling carrying the first indication information, the configuration module 302 is further configured to apply the configuration of all cell group associations in the target RRC signaling, and the configuration of all cell group associations in the RRC signaling subsequently received through the target signaling radio bearer or the target logical channel.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, the first indication information may be configured based on a cell switching device, a signaling radio bearer, or a logical channel, so that the cell switching device realizes flexible configuration after switching to a target cell.

The cell switching device in the embodiment of the application can be an electronic device, for example, an electronic device with an operating system, or can be a component in the electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

The cell switching device provided by the embodiment of the application can realize each process realized by the method embodiment of fig. 2 and achieve the same technical effect, and in order to avoid repetition, the description is omitted here.

As shown in fig. 4, an embodiment of the present application provides a cell handover method, where the execution body of the method is a network side device, in other words, the method may be executed by software or hardware installed in the network side device. The method comprises the following steps.

S410, network side equipment initiates layer 1 or layer 2 switching of a first cell group to a terminal;

s420, the network side equipment sends a target RRC signaling to the terminal after determining that the layer 1 or layer 2 switching execution of the first cell group is completed; the target RRC signaling carries first indication information, and the first indication information is used for indicating the configuration of the terminal application in the target RRC signaling and associated with the first cell group, and the configuration of the follow-up sent RRC signaling and associated with the first cell group.

Optionally, the first cell group is MCG or SCG.

Steps S410 to S420 can implement the method embodiment shown in fig. 2, and obtain the same technical effects, and some repetitive parts will not be described again.

As can be seen from the technical solutions of the above embodiments, in the embodiments of the present application, layer 1 or layer 2 handover of a first cell group is initiated to a terminal; then, after determining that the layer 1 or layer 2 switching execution of the first cell group is completed, transmitting a target RRC signaling to the terminal; the target RRC signaling carries first indication information, and the first indication information is used for indicating the configuration of the terminal applied in the target RRC signaling and associated with the first cell group and the configuration of the subsequently sent RRC signaling and associated with the first cell group, so that the error caused by the configuration in the RRC signaling of the application source cell is avoided after the terminal is switched to the target cell.

Based on the above embodiment, optionally, after initiating a layer 1 or layer 2 handover of the first cell group to the terminal, the method further comprises:

the network side equipment receives an RRC reconfiguration complete message from the terminal.

part of the configuration in the RRC signaling is not applied;

part of the configuration in the RRC signaling is applied;

the reason information that is not applied.

The embodiment of the application can realize the technical scheme of implementing the terminal side method and obtain the same technical effects, and parts are not repeated here.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, an RRC reconfiguration complete message is received from the terminal, so as to notify that the configuration of the network side device portion is not applied, so that the network side device sends the target RRC signaling, and therefore, after the terminal is switched to the target cell, the configuration in the RRC signaling of the target cell can be timely applied.

the terminal;

a target signaling radio bearer;

a target logical channel.

Optionally, in the case that the first indication information is configured based on the terminal, the target RRC signaling is a first RRC signaling sent to the terminal after it is determined that layer 1 or layer 2 handover execution of the first cell group is completed.

Optionally, in the case that the first indication information is configured based on the target signaling radio bearer or the target logical channel, the target RRC signaling is the first RRC signaling sent to the terminal through the target signaling radio bearer or the target logical channel after it is determined that layer 1 or layer 2 handover execution of the first cell group is completed.

As shown in fig. 5, the cell switching apparatus includes: a first transmission module 501 and a second transmission module 502.

The first transmission module 501 is configured to initiate a layer 1 or layer 2 handover of a first cell group to a terminal; the second transmission module 502 is configured to send a target RRC signaling to the terminal after determining that layer 1 or layer 2 handover execution of the first cell group is completed; the target RRC signaling carries first indication information, and the first indication information is used for indicating the configuration of the terminal application in the target RRC signaling and associated with the first cell group, and the configuration of the follow-up sent RRC signaling and associated with the first cell group.

Optionally, the first cell group is MCG or SCG.

Based on the above embodiment, optionally, the second transmission module is further configured to receive an RRC reconfiguration complete message from the terminal.

part of the configuration in the RRC signaling is not applied;

part of the configuration in the RRC signaling is applied;

the reason information that is not applied.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by receiving an RRC reconfiguration complete message from the terminal, the RRC reconfiguration complete message is used to notify that a portion of configuration is not applied, so that a cell switching device sends a target RRC signaling, and therefore, after the terminal switches to a target cell, the terminal can timely apply the configuration in the RRC signaling of the target cell.

the terminal;

a target signaling radio bearer;

a target logical channel.

The cell switching device provided by the embodiment of the present application can implement each process implemented by the method embodiment of fig. 4, and achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

Optionally, as shown in fig. 6, the embodiment of the present application further provides a communication device 600, including a processor 601 and a memory 602, where the memory 602 stores a program or instructions executable on the processor 601, for example, when the communication device 600 is a terminal, the program or instructions implement the steps of the above-mentioned cell handover method embodiment when executed by the processor 601, and achieve the same technical effects. When the communication device 600 is a network side device, the program or the instruction, when executed by the processor 601, implements the steps of the above embodiment of the cell handover method, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the processor is used for executing layer 1 or layer 2 switching of the first cell group, and the communication interface is used for acquiring target RRC signaling carrying first indication information. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 7 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 700 includes, but is not limited to: at least some of the components of the radio frequency unit 701, the network module 702, the audio output unit 703, the input unit 704, the sensor 705, the display unit 706, the user input unit 707, the interface unit 708, the memory 709, and the processor 710.

Those skilled in the art will appreciate that the terminal 700 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 710 via a power management system so as to perform functions such as managing charging, discharging, and power consumption via the power management system. The terminal structure shown in fig. 7 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 704 may include a graphics processing unit (Graphics Processing Unit, GPU) 7041 and a microphone 7042, with the graphics processor 7041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel 7061, and the display panel 7061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 707 includes at least one of a touch panel 7071 and other input devices 7072. The touch panel 7071 is also referred to as a touch screen. The touch panel 7071 may include two parts, a touch detection device and a touch controller. Other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from a network side device, the radio frequency unit 701 may transmit the downlink data to the processor 710 for processing; in addition, the radio frequency unit 701 may send uplink data to the network side device. Typically, the radio unit 701 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 709 may be used to store software programs or instructions and various data. The memory 709 may mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 709 may include volatile memory or nonvolatile memory, or the memory 709 may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 709 in embodiments of the application includes, but is not limited to, these and any other suitable types of memory.

Processor 710 may include one or more processing units; optionally, processor 710 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 710.

The radio frequency unit 701 is configured to obtain a target RRC signaling carrying first indication information;

a processor 710 for performing a layer 1 or layer 2 handover of the first cell group; the first indication information is used for indicating the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in the RRC signaling received subsequently.

Optionally, the processor 710 is further configured to discard the configuration associated with the first cell group in the acquired RRC signaling after starting to perform the layer 1 or layer 2 handover of the first cell group, and apply the configuration associated with other cell groups except the first cell group.

Optionally, the first cell group is MCG or SCG.

The processor 710 is further configured to, prior to acquiring the target RRC signaling:

or,

The embodiment of the application can prevent the error caused by configuration in the RRC signaling of the application source cell after the terminal is switched to the target cell.

Based on the above embodiment, optionally, the radio frequency unit 701 is further configured to send an RRC reconfiguration complete message to the network side device.

part of the configuration in the RRC signaling is not applied;

part of the configuration in the RRC signaling is applied;

the reason information that is not applied.

The embodiment of the application can enable the terminal to timely apply the configuration in the RRC signaling of the target cell after being switched to the target cell.

The cell switching device;

a target signaling radio bearer;

a target logical channel.

Optionally, in the case that the first indication information is configured based on the terminal, after acquiring the target RRC signaling carrying the first indication information, the processor 710 is further configured to configure all cell group associations in the target RRC signaling, and configure all cell group associations in the subsequently received RRC signaling.

Optionally, in the case that the first indication information is configured based on the target signaling radio bearer or the target logical channel, after acquiring the target RRC signaling carrying the first indication information, the processor 710 is further configured to apply the configuration of all cell group associations in the target RRC signaling, and the configuration of all cell group associations in RRC signaling subsequently received through the target signaling radio bearer or the target logical channel.

The embodiment of the application can realize flexible configuration after the terminal is switched to the target cell.

The embodiment of the application also provides network side equipment, which comprises a processor and a communication interface, wherein the processor is used for determining that the layer 1 or layer 2 switching of the first cell group is completed, and the communication interface is used for initiating the layer 1 or layer 2 switching of the first cell group to a terminal; after determining that the layer 1 or layer 2 switching execution of the first cell group is finished, sending a target RRC signaling to the terminal; the target RRC signaling carries first indication information, and the first indication information is used for indicating the configuration of the terminal application in the target RRC signaling and associated with the first cell group, and the configuration of the follow-up sent RRC signaling and associated with the first cell group. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 8, the network side device 800 includes: an antenna 81, a radio frequency device 82, a baseband device 83, a processor 84 and a memory 85. The antenna 81 is connected to a radio frequency device 82. In the uplink direction, the radio frequency device 82 receives information via the antenna 81, and transmits the received information to the baseband device 83 for processing. In the downlink direction, the baseband device 83 processes information to be transmitted, and transmits the processed information to the radio frequency device 82, and the radio frequency device 82 processes the received information and transmits the processed information through the antenna 81.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 83, and the baseband apparatus 83 includes a baseband processor.

The baseband device 83 may, for example, include at least one baseband board, where a plurality of chips are disposed, as shown in fig. 8, where one chip, for example, a baseband processor, is connected to the memory 85 through a bus interface, so as to call a program in the memory 85 to perform the network device operation shown in the above method embodiment.

The network-side device may also include a network interface 86, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 800 of the embodiment of the present application further includes: instructions or programs stored in the memory 85 and executable on the processor 84, the processor 84 invokes the instructions or programs in the memory 85 to perform the method performed by the modules shown in fig. 5, and achieve the same technical effects, and are not repeated here.

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above embodiment of the cell handover method, and can achieve the same technical effects, and in order to avoid repetition, a detailed description is omitted here.

Wherein the processor is a processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage medium such as computer readable memory ROM, random access memory RAM, magnetic or optical disk, etc.

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running programs or instructions, the processes of the embodiment of the cell switching method can be realized, the same technical effects can be achieved, and the repetition is avoided, and the repeated description is omitted.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiment of the present application further provides a computer program/program product, where the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement each process of the above embodiment of the cell handover method, and the same technical effects are achieved, so that repetition is avoided, and details are not repeated herein.

The embodiment of the application also provides a cell switching system, which comprises: the terminal can be used for executing the steps of the cell switching method, and the network side equipment can be used for executing the steps of the cell switching method.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. A method for cell handover, comprising:

under the condition that the terminal is switched between layer 1 and layer 2 of a first cell group, the terminal acquires a target RRC signaling carrying first indication information; the first indication information is used for indicating the configuration of the terminal application associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in the RRC signaling received subsequently.

2. The method of claim 1, wherein prior to acquiring the target RRC signaling, the method further comprises:

after starting to perform layer 1 or layer 2 handover of the first cell group, the terminal discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configuration associated with other cell groups except the first cell group.

3. The method according to claim 2, characterized in that after the terminal discards the configuration associated with the first cell group in the acquired RRC signaling and applies the configuration associated with other cell groups than the first cell group, the method further comprises:

4. The method of claim 3, wherein the RRC reconfiguration complete message carries second indication information, the second indication information being used to indicate at least one of:

part of the configuration in the RRC signaling is not applied;

part of the configuration in the RRC signaling is applied;

the reason information that is not applied.

5. The method of claim 2, wherein the first indication information is configured based on at least one of:

the terminal;

a target signaling radio bearer;

a target logical channel.

6. The method according to claim 5, wherein in case the first indication information is configured based on the terminal, after acquiring the target RRC signaling carrying the first indication information, the method further comprises:

the terminal applies the configuration of all cell group associations in the target RRC signaling and the configuration of all cell group associations in the subsequent received RRC signaling.

7. The method of claim 5, wherein, in the case where the first indication information is configured based on the target signaling radio bearer or target logical channel, after obtaining target RRC signaling carrying the first indication information, the method further comprises:

The terminal applies the configuration of all cell group associations in the target RRC signaling and the configuration of all cell group associations in the RRC signaling subsequently received through a target signaling radio bearer or a target logical channel.

8. The method of claim 1, wherein the first cell group is MCG or SCG.

9. The method of claim 8, wherein prior to acquiring the target RRC signaling, the method further comprises:

under the condition that the first cell group is MCG, the terminal discards and acquires NAS information;

or,

and under the condition that the first cell group is SCG, the terminal applies the acquired NAS message.

10. A cell switching apparatus, comprising:

the configuration module is used for acquiring a target RRC signaling carrying first indication information; the first indication information is used for indicating the configuration associated with the first cell group in the target RRC signaling and the configuration associated with the first cell group in the RRC signaling received subsequently.

11. A method for cell handover, comprising:

12. The method of claim 11, wherein the first indication information is configured based on at least one of:

the terminal;

a target signaling radio bearer;

a target logical channel.

13. The method according to claim 12, wherein in case the first indication information is configured based on the terminal, the target RRC signaling is a first RRC signaling sent to the terminal after determining that layer 1 or layer 2 handover execution of the first cell group is completed.

14. The method according to claim 12, wherein in case the first indication information is configured based on the target signaling radio bearer or target logical channel, the target RRC signaling is a first RRC signaling sent to the terminal over the target signaling radio bearer or target logical channel after determining that layer 1 or layer 2 handover execution of the first cell group is completed.

15. The method of claim 11, wherein after initiating a layer 1 or layer 2 handover of the first cell group to the terminal, the method further comprises:

16. The method of claim 15, wherein the RRC reconfiguration complete message carries second indication information, the second indication information being used to indicate at least one of:

part of the configuration in the RRC signaling is not applied;

part of the configuration in the RRC signaling is applied;

the reason information that is not applied.

17. The method of claim 11, wherein the first cell group is MCG or SCG.

18. A cell switching apparatus, comprising:

19. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the cell handover method of any of claims 1 to 9.

20. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the cell handover method of any of claims 11 to 17.

21. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implements the cell handover method according to any of claims 1-9 or the steps of the cell handover method according to any of claims 11 to 17.