CN115623547A

CN115623547A - Condition switching processing method and device and related equipment

Info

Publication number: CN115623547A
Application number: CN202110808897.0A
Authority: CN
Inventors: 刘佳敏
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2021-07-16
Filing date: 2021-07-16
Publication date: 2023-01-17

Abstract

The application discloses a condition switching processing method, a condition switching processing device and related equipment. In the embodiment of the present application, when a terminal receives a first service in a connected state, the terminal receives a first reconfiguration signaling sent by a source cell, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in; the terminal determines N candidate cells meeting a condition switching execution condition in the M candidate cells; the terminal selects a target cell from the N candidate cells to execute an access process; wherein M and N are positive integers, and M is more than or equal to N.

Description

Condition switching processing method and device and related equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a method, an apparatus, and a related device for processing conditional access.

Background

With the development of communication technology, a terminal can perform conditional switching under the configuration of a network in a communication system. Currently, the condition switching of the terminal does not consider the Service receiving situation of the terminal, and when the terminal performs the condition switching in the process of receiving a Multicast Broadcast Service (MBS) Service, the MBS Service is easily interrupted. Therefore, the problem of low reliability of MBS service transmission caused by condition switching exists in the prior art.

Disclosure of Invention

The embodiment of the application provides a conditional handover processing method, a conditional handover processing device and related equipment, which can solve the problem of low reliability of MBS service transmission caused by conditional handover.

In a first aspect, a conditional handover processing method is provided, including:

under the condition that a terminal receives a first service in a connected state, the terminal receives a first reconfiguration signaling sent by a source cell, wherein the first reconfiguration signaling comprises first configuration information of M candidate cells, and the first service comprises at least one of a broadcast service and a multicast service which are interested by the terminal;

the terminal determines N candidate cells meeting a condition switching execution condition in the M candidate cells;

the terminal selects a target cell from the N candidate cells to execute an access process;

wherein M and N are positive integers, and M is more than or equal to N.

In a second aspect, a conditional switch processing method is provided, including: a network side device sends a first reconfiguration signaling to a terminal, wherein the first reconfiguration signaling comprises first configuration information of M candidate cells, and the first reconfiguration signaling is used for determining N candidate cells meeting a condition switching execution condition in the M candidate cells under the condition that the terminal is in a connected state and receives a first service; the first service comprises at least one of a broadcast service and a multicast service which are interested by the terminal; wherein M and N are positive integers, and M is more than or equal to N.

In a third aspect, a conditional switch processing apparatus is provided, including:

a first receiving module, configured to receive a first reconfiguration signaling sent by a source cell when a terminal is in a connected state and receives a first service, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that are interested in the terminal;

a first determining module, configured to determine, among the M candidate cells, N candidate cells that satisfy a conditional handover execution condition, where N is a positive integer;

an execution module, configured to execute an access procedure in selecting a target cell from the N candidate cells;

wherein M and N are positive integers, and M is more than or equal to N.

In a fourth aspect, a conditional switch processing apparatus is provided, including:

a second sending module, configured to send a first reconfiguration signaling to a terminal, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first reconfiguration signaling is used for determining, when the terminal is in a connected state and receives a first service, N candidate cells that meet a condition handover execution condition in the M candidate cells; the first service includes at least one of a broadcast service and a multicast service of interest to the terminal.

In a fifth aspect, there is provided a terminal comprising a processor, a memory, and a program or instructions stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the method according to the first aspect.

In a sixth aspect, a terminal is provided, comprising a processor and a communication interface, wherein,

the communication interface is configured to receive a first reconfiguration signaling sent by a source cell when a terminal is in a connected state to receive a first service, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in;

the processor is configured to determine N candidate cells satisfying a conditional handover execution condition among the M candidate cells, where N is a positive integer; selecting a target cell from the N candidate cells to execute an access process; wherein M and N are positive integers, and M is more than or equal to N.

In a seventh aspect, a network-side device is provided, which includes a processor, a memory, and a program or an instruction stored on the memory and executable on the processor, and when executed by the processor, the program or the instruction implements the steps of the method according to the first aspect.

In an eighth aspect, a network side device is provided, which comprises a processor and a communication interface, wherein,

the communication interface is configured to send a first reconfiguration signaling to a terminal, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first reconfiguration signaling is used to determine, in a connected state of the terminal, N candidate cells that satisfy a conditional handover execution condition among the M candidate cells when the terminal receives a first service; the first service includes at least one of a broadcast service and a multicast service of interest to the terminal.

In a ninth aspect, there is provided a readable storage medium having stored thereon a program or instructions which, when executed by a processor, carries out the steps of the method of the first aspect or carries out the steps of the method of the second aspect.

In a tenth aspect, embodiments of the present application provide a chip, where the chip includes a processor and a communication interface, where the communication interface is coupled to the processor, and the processor is configured to execute a program or instructions to implement the steps of the method according to the first aspect, or to implement the steps of the method according to the second aspect.

In an eleventh aspect, there is provided a computer program/program product stored in a non-transitory storage medium for execution by at least one processor to implement the method of the first aspect, or to implement the method of the second aspect.

In the embodiment of the application, when a terminal receives a first service in a connected state, the terminal receives a first reconfiguration signaling sent by a source cell, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in; the terminal determines N candidate cells meeting a condition switching execution condition in the M candidate cells; and the terminal selects a target cell from the N candidate cells to execute an access process. Therefore, when the conditional switch is carried out, the candidate cell of at least part of the first service can be selected as the target cell to carry out the conditional switch, thereby effectively ensuring the continuity of MBS service transmission. Therefore, the embodiment of the application can improve the reliability of MBS service transmission in the process of conditional switch of the terminal.

Drawings

Fig. 1 is a block diagram of a network system to which an embodiment of the present application is applicable;

fig. 2 is a flowchart of a conditional switching processing method according to an embodiment of the present application;

fig. 3 is a flowchart of another conditional switching processing method according to an embodiment of the present application;

fig. 4 is a structural diagram of a condition switching processing apparatus according to an embodiment of the present application;

fig. 5 is a structural diagram of another condition switching processing apparatus according to an embodiment of the present application;

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

fig. 7 is a block diagram of a terminal according to an embodiment of the present disclosure;

fig. 8 is a block diagram of a network side device according to an embodiment of the present application.

Detailed Description

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

The terms first, second and the like in the description and in the claims of the present application 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 other sequences than those illustrated or otherwise described herein, and that the terms "first" and "second" used herein generally refer to a class and do not limit the number of objects, for example, a first object can be one or more. In addition, "and/or" in the specification and claims means at least one of connected objects, and a character "/" generally means that the former and latter related objects are in an "or" relationship.

It is noted that the techniques described in the embodiments of the present application are not limited to Long Term Evolution (LTE)/LTE-Advanced (LTE-a) systems, but may also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), time Division Multiple Access (TDMA), frequency Division Multiple Access (FDMA), orthogonal Frequency Division Multiple Access (OFDMA), single-carrier Frequency Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" are often used interchangeably in embodiments of the present application, and the described techniques may be used for both the above-mentioned systems and radio technologies, as well as for other systems and radio technologies. The following description describes a New Radio (NR) system for exemplary purposes and uses NR terminology in much of the description below, and the techniques may also be applied to applications other than NR system applications, such as 6th generation (6 g) communication systems.

Fig. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network-side device 12. Wherein, the terminal 11 may also be called as a terminal Device or a User Equipment (UE), the terminal 11 may be a Mobile phone, a Tablet Personal Computer (Tablet Personal Computer), a Laptop Computer (Laptop Computer) or a notebook Computer, a Personal Digital Assistant (PDA), a palmtop Computer, a netbook, a super-Mobile Personal Computer (UMPC), a Mobile Internet Device (MID), a Wearable Device (Wearable Device) or a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), and other terminal side devices, the Wearable Device includes: smart watches, bracelets, earphones, glasses, and the like. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network-side device 12 may be a Base Station or a core network device, where the Base Station may be referred to as a node B, an enodeb, an access Point, a Base Transceiver Station (BTS), a radio Base Station, a radio Transceiver, a Basic Service Set (BSS), an Extended Service Set (ESS), a node B, an evolved node B (eNB), a home node B, a home enodeb, a WLAN access Point, a WiFi node, a Transmit Receive Point (TRP), or some other suitable term in the field, as long as the same technical effect is achieved, the Base Station is not limited to a specific technical vocabulary, and it should be noted that, in the embodiment of the present application, the Base Station in the NR system is only used as an example, but the specific type of the Base Station is not limited.

For convenience of understanding, some contents related to the embodiments of the present application are described below:

1. broadcast and multicast.

In the LTE Broadcast Multicast transmission, multimedia Broadcast Multicast Service (MBMS) Service transmission in a Multicast Broadcast Single Frequency Network (MBSFN) mode and Multicast Service transmission in a Single cell Point to Multipoint (sc-ptm) mode are supported. In the MBSFN manner, cells in the same MBSFN area may synchronously transmit the same broadcast service, which is convenient for UE to receive. The control information (including control channel parameters, service channel parameters, scheduling information, etc.) and data information of the MBMS service are both transmitted in a broadcast manner, so that idle (idle) state UEs and connected state UEs can both receive the MBMS service. sc-ptm is a multicast transmission mode standardized after the MBMS service, and is scheduled and transmitted only in a single cell, which is the biggest difference with the MBSFN mode, and the service is scheduled by a group Radio Network Temporary Identifier g-RNTI (g-RNTI). The control channel parameters, the service identifiers, the period information and the like are broadcasted in the broadcast message, the scheduling information is notified by a Physical Downlink Control Channel (PDCCH) scrambled by the g-RNTI, and the data part is sent in a multicast mode, which is equivalent to that interested UE monitors the g-RNTI to obtain data scheduling and then receives the data scheduling.

2. Point-to-Point (PTP) and Point-to-Multipoint (PTM).

For a multicast service, the network side device may configure two paths for the UE to transmit simultaneously, where one path is a PTP path (PTP leg) and the other path is a PTM path (PTM leg). The PTM path refers to scrambling of a PDCCH using a common RNTI, for example, a Group-RNTI, where all users in a Group monitor scheduling of the Group-RNTI and receive scheduling data thereafter together, and a transmission can be received by multiple UEs at a time, and the PTP path refers to scrambling of a PDCCH using a Cell Radio Network Temporary Identifier (C-RNTI) dedicated to the UE, and only this UE can monitor scheduling of the C-RNTI and receive scheduling data thereafter, and a transmission can be received by only one UE at a time.

PTM is transmitted to multiple UEs simultaneously, and the transmission efficiency is high, but it needs to consider coverage of all UEs comprehensively, so it needs to be applied to all UEs as much as possible in the selection of transmission parameters, for example, using omni-directional antenna, considering link quality of poor user, etc., PTM may not work well for individual UE with very poor link quality. PTP is dedicated transmission for one UE, and may adjust a transmission parameter in consideration of a link condition of the user, for example, using a directional or shaped antenna, and setting a suitable transmission parameter according to a link of the current UE, so that a transmission effect for a single UE is good, but if there are multiple users, multiple transmission resources are required, and resource efficiency is low.

3. Conditional Handover (CHO).

After deciding to perform the CHO handover, the source cell sends a handover request message to two or more potential target cells and receives a handover request response message. And generating a reconfiguration signaling of the conditional handover according to the handover response message, wherein the reconfiguration signaling of the conditional handover comprises the configuration of two or more candidate target cells and the execution condition of the conditional handover. After the UE returns the reconfiguration completion signaling, the evaluation of the CHO condition is started, when any potential target cell meets the execution condition of the conditional handover, the UE leaves (detach) from the source cell, performs synchronous access to the target cell meeting the condition, and sends a CHO handover completion message in the target cell.

In the Xn interface, early status transfer (early status transfer) and early data forwarding may be performed, or after the UE successfully accesses the target cell, the target cell sends a signaling for successful handover to the source cell to trigger normal sequence number status transfer (SN status transfer) and data forwarding process. The source cell sends a switching cancellation signaling to other candidate target cells which are not accessed, and the cells are informed to stop the CHO process and resource reservation and the like related to the UE.

In the process of conditional switch, if a normal switch command is received, the UE executes a normal switch process, and the conditional switch configuration is automatically released.

When there are two or more cells satisfying the conditional handover execution condition, the UE decides which cell to select as the final target cell, for example, the UE may select one cell to execute the conditional handover considering beam (beam) and beam quality.

The condition switching processing method provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings by using some embodiments and application scenarios thereof.

Referring to fig. 2, fig. 2 is a flowchart of a conditional access processing method according to an embodiment of the present disclosure, and as shown in fig. 2, the method includes the following steps:

step 201, when a terminal is in a connected state to receive a first service, the terminal receives a first reconfiguration signaling sent by a source cell, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in;

in this embodiment of the application, the first service is a service in which the terminal is interested, and specifically may include at least one of a broadcast service and a multicast service, and certainly in some embodiments, the first service may further include a unicast service. The service of interest may be understood as a service that the terminal needs to receive, for example, when a user watches a certain video through the terminal, the video may be understood as the service of interest of the terminal.

Specifically, in some embodiments, the network side device may receive first configuration information sent by a plurality of candidate cells under the condition that the terminal receives the first service, and send the first reconfiguration signaling to the terminal when it is determined that the terminal can perform the conditional handover, so that the terminal can perform the conditional handover according to the first reconfiguration information. In some embodiments, the network side device may notify a plurality of candidate cells of a first service of the terminal, then receive first configuration information sent by each candidate cell based on the first service, and send a first reconfiguration signaling to the terminal when it is determined that the terminal may perform conditional handover, so that the terminal may perform conditional handover according to the first reconfiguration information.

It should be noted that, when the terminal is in the connected state and receives the first service, it may be understood that the terminal is in the connected state and is receiving the first service; or, it may be understood that the terminal is in a connected state and is ready to receive the first service, for example, the earlier stage of sending, by the terminal, a request for receiving the first service to the network side device and receiving the first service all belong to a case that the terminal is in a connected state and receives the first service.

Step 202, the terminal determines N candidate cells satisfying a conditional handover execution condition among the M candidate cells;

in the embodiment of the present application, the condition switch execution condition may be referred to as a condition switch execution criterion, or may be referred to as an execution condition of the condition switch. The condition switching execution condition specific condition information may be set according to the actual condition, and specifically refer to the condition switching related technology, which is not further limited herein.

Step 203, the terminal selects a target cell from the N candidate cells to execute an access process;

wherein M and N are positive integers, and M is more than or equal to N.

In this embodiment, the target cell may be one of N candidate cells, when N is greater than 1, the target cell may be selected based on the first configuration information, and when N is equal to 1, the candidate cell that satisfies the conditional handover execution condition is directly used as the target cell to execute the handover procedure. When the handover process is executed, the terminal may leave from the source cell while performing synchronous access to the target cell.

It should be understood that the terminal may select a target cell that may support the first service based on the frequency point information of the candidate cell or the first configuration information, so as to ensure continuity of the first service that the terminal is interested in, and improve reliability of transmission. In other words, in this embodiment of the application, the terminal may select the target cell based on the first configuration information or the frequency point information, and the selected target cell supports at least part of the first service. Optionally, in some embodiments, the first configuration information may also include frequency point information.

It should be noted that, in this embodiment of the present application, the service in which the terminal is interested may include one type of service or multiple types of services, and when the service in which the terminal is interested includes a target service, the target cell selection may be performed based on the target service, where the target service is a multicast service or the broadcast service. For example, in some embodiments, the target cell satisfies at least one of:

under the condition that the number of first candidate cells meeting a first preset condition exists in the N candidate cells and is 1, the target cell is the first candidate cell;

the target cell is a cell determined from a plurality of first candidate cells based on a first preset rule under the condition that the number of the first candidate cells meeting a first preset condition exists in the N candidate cells and is greater than 1;

the first preset condition includes that a target service and a unicast service are supported, and the target service is the multicast service or the broadcast service.

In this embodiment, the terminal may determine whether each first candidate cell satisfies the first preset condition according to the first configuration information of the N first candidate cells. Specifically, the terminal may determine whether to support the target service according to at least one of the following indications displayed in the first configuration information of each first candidate cell: whether broadcast services are supported, whether multi-services are supported, a list of supported broadcast services, a list of supported multicast services, a list of frequency points, areas, and cells, etc.

Optionally, the first preset rule includes at least one of:

determining the target cell based on the number of the target services supported by each first candidate cell, wherein the number of the target services supported by the target cell is the largest;

and determining the target cell based on the priority of the target service supported by each first candidate cell, wherein the priority of the target service supported by the target cell is the highest.

In this embodiment, when more than one first candidate cell satisfies the first preset condition, in some embodiments, more first candidate cells supported by the target service may be selected as the target cell. For example, when the target service is a broadcast service, the services in which the terminal is interested include broadcast service 1, broadcast service 2 and broadcast service 3, where the first candidate cell 1 supports broadcast service 1 and broadcast service 2, and the first candidate cell 2 supports broadcast service 3, and at this time, the first candidate cell 1 may be selected as the target cell.

In some embodiments, a first candidate cell with a better priority of the supported target service on the UE side may also be selected. For example, when the target service is a broadcast service, the services in which the terminal is interested include broadcast service 1 and broadcast service 2, where the first candidate cell 1 supports broadcast service 1, and the first candidate cell 2 supports broadcast service 2, and assuming that the priority of broadcast service 2 is higher than that of broadcast service 1 for the terminal, the candidate cell 2 may be selected as the target cell.

In some embodiments, the number and priority of the target services supported by each first candidate cell may also be determined. When the target service is a broadcast service, the services that the terminal is interested in include broadcast service 1, broadcast service 2, broadcast service 3, broadcast service 4 and broadcast service 5, where the candidate cell 1 supports broadcast service 1, the candidate cell 2 supports broadcast service 2 and broadcast service 3, and the candidate cell 3 supports broadcast service 4 and broadcast service 5, and it is assumed that for the terminal, the priority of broadcast service 1 is equal to the priority of broadcast service 2, and the priority of broadcast service 1, the priority of broadcast service 4, the priority of broadcast service 3 and the priority of broadcast service 5 are arranged from high to low, at this time, the candidate cell 2 and the candidate cell 3 may be first obtained by screening based on the number of target services supported by the candidate cell, and then the candidate cell 2 is selected as the target cell based on the priority. It should be noted that, in other embodiments, the selection of the priority may be performed first, and then the selection of the number may be performed. For example, candidate cell 1 and candidate cell 2 may be first screened based on the priority of the target services supported by the candidate cells, and then candidate cell 2 may be selected as the target cell based on the number of target services supported by the candidate cells.

It should be understood that when none of the first candidate cells supports the target service, the target cell may be selected according to other relevant rules, for example, the selection may be made according to the quality of the beam, and is not further limited herein.

Optionally, in some embodiments, in a case that the first traffic includes at least two types of traffic among multicast traffic, broadcast traffic, and unicast traffic, and the N candidate cells do not have a second candidate cell that supports the at least two types of traffic at the same time, the target cell is determined based on priorities of the at least two types of traffic, and the target cell supports at least one type of traffic with a highest priority among the at least two types of traffic, which is supported by the N candidate cells.

In the embodiment of the application, firstly, a candidate cell capable of carrying out the highest priority service in the service of interest of the terminal is selected from the N candidate cells, if the N candidate cells do not support the highest priority service in the service of interest of the terminal, a candidate cell capable of carrying out the next highest priority service in the service of interest of the terminal can be selected, and the like, so that a target candidate cell of the service of the highest priority class in at least one class of services supported by the N candidate cells is obtained, and the target candidate cell is taken as a target cell.

It should be understood that, if the number of target candidate cells is multiple, the target cell may be further determined based on the number and/or priority of the supported services of interest to the terminal. For a specific implementation, reference may be made to the foregoing embodiments, which are not described herein again.

Optionally, the priority of the multicast service, the priority of the broadcast service, and the priority of the unicast service satisfy any one of the following:

the multicast service, the broadcast service and the unicast service have different priorities;

the multicast traffic and the broadcast traffic have a first priority, the unicast traffic has a second priority, and the first priority is higher or lower than the second priority;

the broadcast traffic and the unicast traffic have a third priority, the multicast traffic has a fourth priority, and the third priority is higher or lower than the fourth priority;

the multicast traffic and the unicast traffic have a fifth priority, the broadcast traffic has a sixth priority, and the fifth priority is higher or lower than the sixth priority.

It should be understood that, in the embodiment of the present application, the at least one type of service with the highest priority supported by the N candidate cells may be understood that, when the priorities of the multiple types of services are the same, a certain candidate cell may support the multiple types of services at the same time.

Optionally, after the step of performing the access procedure by the terminal in the N candidate cell selection target cells, the method further includes at least one of:

under the condition that the target cell supports the first service, the terminal continues to receive the first service through the target cell;

under the condition that the target cell does not support the first service, the terminal initiates a session establishment request of a Protocol Data Unit (PDU), and receives the first service in a unicast mode in the target cell;

and in the case that the target cell is not within the transmission permission range of the first service, the terminal stops receiving the first service.

It should be understood that, when the first service is a different type of service, the implementation process of continuing to receive the service is different, for example, in some embodiments, the continuing to receive the first service in the target cell includes at least one of the following:

under the condition that the first service is a broadcast service, reading System Information Block (SIB) Information of a multicast broadcast service MBS in the target cell, acquiring service configuration of the first service, and continuously receiving the first service in the target cell in a broadcast mode;

and under the condition that the first service is the multicast service, continuously receiving the first service in the target cell in a multicast mode according to the multicast service configuration information carried in the first configuration information of the target cell.

Optionally, the first configuration information includes at least one of:

the first indication information is used for indicating whether the candidate cell supports the MBS service;

a MBS service list supported by the candidate cell;

second indication information, configured to indicate whether the candidate cell supports the broadcast service;

a list of broadcast services supported by the candidate cell;

third indication information, configured to indicate whether the candidate cell supports the broadcast service that the terminal is interested in;

a list of broadcast services supported by the candidate cell that are of interest to the terminal;

first MBS SIB information;

first Multicast Control Channel (MCCH) information.

Optionally, in a case that the first service is a broadcast service, after the terminal performs an access procedure in the N candidate cell selection target cells, the method further includes:

the terminal acquires a first version identification of the target cell;

under the condition that the identification value corresponding to the first version identification is different from the identification value corresponding to the second version identification carried by the first configuration information, the terminal acquires the broadcast service configuration associated with the identification value corresponding to the first version identification;

wherein the first version identification and the second version identification each comprise an identification value associated with a first object comprising at least one of: MBS SIB information, MCCH information, and Temporary Mobile Group Identity (TMGI) service configuration.

In this embodiment of the application, the second version identifier includes at least one of a first identifier value associated with MBS SIB information, a second identifier value associated with MCCH information, and a third identifier value associated with TMGI service configuration. Wherein the first identification value is included in the first MBS SIB information, and the second identification value and the third identification value are included in the first MCCH information.

It should be understood that the terminal may obtain the first version identification by reading the SIB and MCCH information transmitted by the target cell. The first identification value, the second identification value and the third identification value may be each understood as a version number. Since the first configuration information carries the corresponding version number, whether the corresponding configuration information has update or not can be obtained. The identifier value of the first version identifier is different from the identifier value of the second version identifier, which may be understood that the version number in the first version identifier is different from the version number in the second version identifier, and at this time, the broadcast service configuration needs to be updated, for example, the terminal may further read the related content of the MCCH information, thereby obtaining the updated broadcast service configuration of the target cell, updating the locally stored broadcast service configuration, and continuing to receive the broadcast service using the updated broadcast service configuration.

Optionally, in a case that the first service is a multicast service, the first configuration information includes multicast service configuration information.

In this embodiment, the multicast service configuration information may include detailed configuration information corresponding to the interested TMGI.

The multicast service configuration information carries a third version identification, the third version identification is associated with a second object, and the second object is a Temporary Mobile Group Identification (TMGI) or a group radio network temporary identification (G-RNTI).

It should be understood that since the multicast service is given a group of multicast configurations in the granularity of one TMGI or G-RNTI when the configuration is given, that is, one multicast service or services scheduled using the same G-RNTI are basic units, a third version identification with an identification value for indicating the version number may be given to such a group of multicast configurations.

It should be noted that the length of each version id needs to depend on the frequency of change, for the case of slow change, 1bit,0 and 1 can be used to represent two configuration versions, and for the case of severe change, 4bit,16 versions can be used to correspond to the configurations in different periods.

Optionally, after the step of performing the access procedure by the terminal in the N candidate cell selection target cells, the method further includes:

the terminal acquires a fourth version identification of the target cell, wherein the fourth version identification is associated with the second object;

and under the condition that the identification value corresponding to the fourth version identification is different from the identification value corresponding to the third version identification, the terminal sends target information to the target cell, wherein the target information is used for updating the multicast service configuration information.

In the embodiment of the application, the target cell may notify the fourth version identifier in a broadcast or dedicated signaling manner, so that the access terminal can acquire the version information of the multicast service configuration information. And determining whether the multicast service configuration information needs to be updated or not by comparing the identification value of the currently acquired fourth version identification with the identification value of the locally stored third version identification, and if the multicast service configuration information needs to be updated, updating the multicast service configuration information by reporting the target information.

Specifically, the updating mode may be set according to actual needs, for example, in some embodiments, the request message may carry the multicast service identifier by sending a multicast service configuration information update request message (that is, the target information is a multicast service configuration information update request message). And then the target cell sends the updated multicast service configuration information to the terminal. In some embodiments, the multicast service identifier and the third version identifier may also be directly reported, the target cell determines whether the multicast service configuration information of the terminal needs to be updated, and when the multicast service configuration information needs to be updated, the target cell issues the updated multicast service configuration information to the terminal.

Certainly, in some embodiments, a service list of a service that the terminal is interested in may also be reported through the target information, so as to obtain multicast service configuration information that needs to be updated.

In some embodiments, the UE may further be controlled by the network side device, because the network side device may record a corresponding relationship between the current multicast service configuration information and the UE when configuring the multicast service for the UE, and after the UE subsequently accesses, the network side device determines whether to resend the multicast service configuration information to the UE according to the previous record and a condition that the multicast service configuration information of the network side device changes.

Optionally, in some embodiments, in a case that the service in which the terminal is interested is updated from the first service to a second service, the method further includes:

the terminal reports the second service to the source cell through Radio Resource Control (RRC) signaling;

or, in a case that the first service is a multicast service, the terminal reports the second service to a core network device through Non-access stratum (NAS) layer signaling.

In this embodiment, the reporting, by the terminal, the second service to the source cell through the RRC signaling may be understood as reporting, by the terminal, the second service to an access device (e.g., a base station) of the source cell through the RRC signaling. Under the condition that the terminal reports the second service to the core network equipment through the non-access stratum (NAS) layer signaling, after the terminal accesses the target cell and the target cell sends a path switching process to the core network equipment, the core network equipment can know that the terminal is transferred to the target cell, so that the second service of the terminal stored by the core network equipment can be synchronized to the target cell once, the access equipment of the target cell can know the latest service of interest of the terminal, and the target cell prepares necessary update configuration for the terminal.

It should be noted that, for the update report of the multicast service, RRC signaling may be used, and NAS layer signaling may also be used, which is not further limited herein.

Optionally, after the terminal reports the second service to the source cell through radio resource control RRC signaling, the method further includes:

and the terminal receives a second reconfiguration signaling sent by the source cell based on the second service, wherein the second reconfiguration signaling is used for updating the first configuration information of the candidate cell.

In this embodiment of the application, the network side device may determine, based on the second service, whether to send the second reconfiguration signaling according to the size of the update change of the first configuration information, so as to re-cover the first reconfiguration signaling. In general, there are several situations:

if the UE changes twice before and after, which may have a relatively large impact on the configuration, the UE may select an update process to cover the previous configuration information, for example, the UE changes from being uninterested to being interested;

if the UE changes twice before and after without causing a relatively large influence on the configuration, the UE may choose not to update to the target side, that is, maintain the existing configuration information, for example, the UE only changes from the service of interest 1 to the service of interest 2, and the two services are sent in the same or similar manner.

Optionally, in a case that the service that the terminal is interested in is updated from the first service to a second service within a preset time period before the first reconfiguration signaling is received, the method further includes:

under the condition of accessing the target cell, the terminal reports the second service;

and the terminal receives the second service in the target cell.

In the embodiment of the application, when the terminal has an interested service change and the changed second service occurs in the preset time period before the first reconfiguration signaling is received, the terminal cannot receive the second service based on the first configuration information, so that the second service is received by reporting the second service after the terminal is accessed to the target cell, and therefore, the service reception disconnection caused by condition switching can be avoided, and the transmission reliability can be improved.

Optionally, in some embodiments, before the step of receiving, by the terminal, the first reconfiguration signaling sent by the source cell, the method further includes:

the terminal reports the first service to the source cell through Radio Resource Control (RRC) signaling; alternatively, the first and second liquid crystal display panels may be,

and under the condition that the first service is a multicast service, the terminal reports the first service to core network equipment through non-access stratum (NAS) layer signaling.

For a better understanding of the present application, the following detailed description is given by way of some specific examples.

The first embodiment is as follows: CHO receiving Broadcast (Broadcast) service UE.

Broadcast traffic is characterized by the fact that the UE can receive in any state, such as Idle, active or Connected. Since the conditional handover procedure occurs in the Connected state, the following is for the Connected UE receiving the broadcast traffic.

Generally, behavior of Connected UE receiving broadcast service is consistent with other state UEs. And the UE finds the scheduling position and information of the MCCH by reading the MBS SIB, reads the MCCH, thereby obtaining the cell service list and the corresponding MTCH configuration and further receiving the service data. However, the Connected UE also has a unique place to be considered, for example, the most basic assumption of the Connected UE is that it can read common channels such as SIB, MCCH update notification (change notification), MCCH, etc. on a Primary serving cell (Pcell), and whether it can read in other serving cells (serving cells) and other non-serving cells, depending on the UE capability; furthermore, NR Connected UE has only one active Bandwidth Part (active BWP) on each serving cell, and when the network side device configures or activates BWP, it must ensure that the UE can perform Unicast (Unicast) transmission and Broadcast reception simultaneously on the BWP.

In order to ensure broadcast reception of Connected UE, UE needs to report its latest broadcast service information (Interest indication) to the serving cell, including one or a combination of the broadcast service ID, the frequency point where the broadcast service is located, and the area information of the broadcast service, so that the serving cell configures Pcell and active BWP for it to give consideration to both Unicast and broadcast reception.

When the network side device determines that one UE can perform conditional handover, it may send the configuration information of the UE in the source cell and the broadcast interest information of the UE to multiple candidate cells, and the candidate cells determine the first configuration information in the candidate cells for the UE according to the information, where PCell and BWP configurations need to be considered, so as to ensure that the UE can receive both unicast and broadcast in the candidate cells. Generally, among the candidate cells, it is possible that some target cells support the broadcast service of interest to the UE, and other candidate cells do not.

The source cell organizes the first configuration information of the candidate cells into a reconfiguration signaling containing conditional switch information, and the reconfiguration signaling and the conditional switch execution conditions are sent to the UE together. And after receiving the reconfiguration signaling, the UE returns that the reconfiguration is completed. And starting to evaluate the candidate cells, and once finding that the candidate cells meet the condition switching execution condition, the behavior of the UE is as follows:

when only one candidate cell meets the condition switching execution condition, the UE can only perform the switching execution process to the cell, disconnect the source cell connection, perform access to the target cell and the like;

and when two or more than two candidate cells meet the condition switching execution condition, the UE selects an accessed target cell according to a preset rule.

Wherein the preset rule comprises at least one of the following items:

preferentially selecting candidate target cells capable of simultaneously supporting both uni and broadcast, wherein the judgment criterion is as follows: judging whether the candidate target cell supports at least one of a broadcast service, a service list (list), a frequency point, a region and a cell list according to the explicit indication of the candidate target cell;

when more than one candidate cell can support both uniquest and broadcast, selecting broadcast service to support more candidate target cells, or selecting the candidate target cells with higher priority on the UE side;

when none of the cells can support all the broadcast services of interest to the terminal, the UE selects the target cell to access according to the existing rule.

After the UE selects the target cell, the access process is executed, and the following operations are executed after the UE accesses the target cell:

if the target cell is a cell supporting the broadcast service which is interested by the UE, the UE reads the MBS SIB and the MCCH in the target cell, and starts to continuously receive the interested broadcast service in the target cell after the configuration of the interested service is obtained;

if the target cell does not support the broadcast mode to send the service interested by the UE, the UE initiates a unicast PDU session establishment request to the core network and receives the interested MBS service in a unicast mode;

if the target cell does not support the broadcast mode to send the service interested by the UE and the cell is not in the sending permission range of the service interested by the UE, the UE can only stop the MBS service receiving.

Optionally, when the candidate cell determines the first configuration information or the second configuration information for the terminal, there may be some additional information to assist the UE in selecting an access cell or performing broadcast service reception as soon as possible after the access, where the additional information includes at least one of the following:

a MBS service list supported by the candidate cell;

second indication information, which is used for indicating whether the candidate cell supports the broadcast service;

a list of broadcast services supported by the candidate cell;

first MBS SIB information;

first multicast control channel, MCCH, information.

The MBS SIB information mainly includes MBS basic content, such as MCCH location and period information, SAI (Service Area Indication) information, which is used to explain basic support situation and MCCH configuration, and generally, the MBS SIB is static and has very small change probability, so that even if it is carried in the conditional switch signaling, there is no great concern about changes in the middle.

The MCCH mainly includes a specific service list and a specific configuration of each service, and if the service is to be forwarded to the UE, only the service in which the UE is interested may be selected for transmission, or the service may be sent in a packet, but since the service is frequently reached and terminated, if the condition switching is continued for a long time and the condition switching execution condition is still not satisfied, the possibility of a change in the middle is very high; even if only one service is interested in the UE, the situation that configuration change is needed due to other reasons, such as preemption and preemption, or halfway pause due to insufficient resources, or service ending, is not excluded.

In order to mark the part which may be changed, version information may be introduced, for example, the entire MCCH information is given to a version number, or each TMGI service configuration is given to a version number and is sent to the UE.

Alternatively, since the UE may actually perform the handover before the conditional handover reconfiguration signaling is received, the inter-gap time may be much longer than the normal handover, and if an interest change occurs, the related actions may include:

if interest change occurs before the UE receives the reconfiguration signaling of the condition switching, for example, during the period from the first N seconds to the time when the UE accesses the target cell, the new interest information with high probability is not forwarded to the target cell by the source cell, so that at least after the UE accesses the target cell, one time of interest information reporting needs to be immediately carried out in the target cell, the latest interest information is synchronized to the target base station, and the target base station is convenient to carry out necessary reconfiguration so as to adapt to new service receiving requirements;

as to the interest change of the UE within this period of time, the interest change also needs to be reported to the source cell as usual, and the source cell may optionally update to the target cell again, so that the target cell can update the configuration information to cover the previous reconfiguration signaling, and generally, the following situations exist:

if the UE changes twice before and after without causing a large impact on the configuration, the UE may choose not to update the target side, that is, maintain the existing configuration information, for example, the UE only changes from the service 1 of interest to the service 2 of interest, and the two services are sent in the same or similar manner;

or, for simplicity, the update process is not performed by default, and the generated interest information is changed and reported to the target cell after the UE accesses the target cell, so that the target cell is reconfigured as needed.

The interest change also includes the service ending condition, and when one service ends, it also means that the UE is not interested in the service any more.

Example two: and receiving the CHO of the multicast service UE.

Multicast services are divided into two categories according to their transmission characteristics:

1. multicast for Connected only (Multicast for Connected only): most multimedia services have higher Quality of Service (QoS) requirements, for example, the block error rate is 10^ -5 or less, the UE needs to enter a connected state for receiving, and the connected UE can better perform Hybrid automatic repeat request (HARQ) feedback and measurement and PTP leg configuration; in this case, the network side device generally sends the service configuration information to the UE through dedicated RRC signaling, and schedules the PTM leg on the service data through the G-RNTI, and optionally assists with scheduling the PTP leg using the C-RNTI.

Multicast for Idle or active (Multicast for Idle/Inactive): a small part of multicast service cannot accommodate all UE to enter a connected state for receiving because of the common QoS requirement or because of the load of network side equipment, and all or part of UE is allowed to receive in Idle/Inactive; in this case, the network side device may send the service configuration information to the UE through a common signaling, such as MCCH, or still use a dedicated RRC signaling to send the configuration information and inform the UE that the UE can still continue to use in idle/inactive, optionally carrying the range information of the continuous use, and schedule the PTM leg only through the G-RNTI for the service data.

Optionally, for a multicast for idle/inactive sending manner, if the configuration information is sent through the MCCH, the sending manner is substantially similar to the broadcast sending manner in the first embodiment, which may be specifically referred to in the first embodiment and is not described herein again. If the configuration information is sent by dedicated signaling plus optional indication of application scope, this way is similar to the sending way of multicast for connected only, and is a proper subset of the latter, so it can be categorized into the sending way of multicast for connected only. Based on this, the following describes the handover procedure of the Connected UE in the multicast for Connected only mode in detail.

Firstly, when the UE is in a source cell, the source cell may know which multicasts for connected only services are interested by the UE through a CN or a UE report, so as to provide the UE with configuration information of these services, including G-RNTI, MRB related configuration, and PTM configuration, optionally, a PTP leg configured with the MRB may also be configured for the UE.

When the UE meets a condition handover, for example, measurement of the UE reaches a certain threshold, the source cell performs a handover preparation process to two or more candidate cells, where a handover request carries all configurations of the UE in the source cell, and the configurations include both Unicast configuration and multicast configuration, and the UE sends the configurations to the candidate cells, and the candidate cells determine first configuration information of the candidate cells according to the configuration of the UE in the source cell.

After each candidate cell returns a switching request confirmation, the source cell organizes the first configuration information of two or more candidate cells into a reconfiguration signaling, and the reconfiguration signaling is sent to the UE together with the execution conditions of the conditional switching. Wherein, part of candidate cells support the multicast service interested by the UE, and the rest of candidate cells do not support the multicast service interested by the UE, the distinguishing mode is very obvious, the supported candidate target cell configuration can explicitly carry the multicast service configuration information, and the supported candidate target cell configuration does not contain the multicast service configuration information.

And the UE receives the reconfiguration signaling and returns the completion of reconfiguration. And then, starting to evaluate the candidate target cell, wherein when the candidate cell meets the condition switching execution condition, the UE acts as follows:

when only one candidate cell meets the conditional switch executing condition, the UE can only perform the switch executing process to the cell, disconnect the source cell connection, perform access to the target cell and the like;

Wherein the preset rule comprises at least one of the following items:

preferentially selecting candidate target cells capable of simultaneously supporting unicast and multicast, wherein the judgment criteria are as follows: whether the configuration of the candidate target cell contains multicast service configuration information or not;

when more than one candidate cell can support unicast and multicast at the same time, selecting a multicast service to support more candidate target cells, or selecting a candidate target cell with a higher priority on the UE side of the supported multicast service;

when none of the cells can support all the multicast services of interest to the terminal, the UE selects the target cell for access according to the existing rules.

if the target cell is a cell supporting the multicast service which the UE is interested in, the UE starts to continue to receive the multicast service which the UE is interested in the target cell according to the multicast service configuration information contained in the target cell configuration;

if the target cell does not support multicast mode to send the interested service of the UE, the UE initiates a unicast PDU session establishment request to the core network and receives the interested MBS service in a unicast mode;

if the target cell does not support the multicast mode to send the service interested by the UE and the cell is not in the sending permission range of the service interested by the UE, the UE can only stop the MBS service receiving.

Alternatively, when the candidate cell contains the multicast service configuration information, since the UE actually performs handover before the reconfiguration signaling is received, the middle interval time may be much longer than that of normal handover, and there is no limit in the middle between the two, and the multicast service configuration information may remain unchanged completely, especially common configurations common to other interested UEs, such as G-RNTI, MRB, PTM configuration, scheduling resources, etc., which may have a possibility of needing adjustment due to the continuous arrival of new services, the change of system load, etc. To cope with possible configuration changes.

First, because a multicast service uses one TMGI/G-RNTI as a granularity when giving a configuration, that is, one multicast service or a service scheduled by using the same G-RNTI is a basic unit, and a group of multicast configurations is given, we can allocate a version identifier for such a group of multicast configurations, where the length of the version identifier needs to depend on the frequency of change, for the case of slow change, 1bit,0 and 1 can be used to represent two configuration versions, and for the case of severe change, 4bit and 16 versions can be used to respectively correspond to configurations of different periods. When the candidate cell performs multicast service configuration information for the UE, the candidate cell simultaneously carries a current version identifier, for example, the version number is 8. When the UE meets the condition switching execution condition, after the UE accesses the target cell, the UE can actively report the version number taken by the UE, the network side equipment judges whether the configuration is the latest configuration, if the configuration is not the latest configuration sent once, or the UE tries to receive the service first according to the configuration in hand, finds the abnormality and reports the abnormality to the network side equipment.

In the second mode, the network side device performs control, because the network side device may record the corresponding relationship between the current configuration information and the UE when configuring the multicast service for the UE, and after the UE subsequently accesses, the network side device determines whether to resend the multicast service to the UE according to the previous record and the situation of the change of the multicast service configuration.

Optionally, since the UE actually performs handover before receiving the reconfiguration signaling, the inter-period time may be much longer than that of normal handover, and if an interest change occurs, if the interest change is reported to the network side device by the UE, the related behavior is similar to that in embodiment one. If the interest change is reported to a Core Network device (Core Network, CN) by the UE through the NAS process, and then notified to an Access Network device (Radio Access Network, RAN) by the CN, this way is a new way different from the first embodiment, and the related process is as follows:

when the UE is in the source cell, if interest changes, the UE reports CN through NAS, and CN synchronizes information to the source cell;

for the target cell, a relatively conservative way is that once the UE accesses the target cell, after the target cell sends a path switch (path switch) procedure to the CN, the CN may know that the UE has transferred to the target cell, and may synchronize the latest interest information of the UE stored by the CN to the target cell once, so that the target cell can know the latest interest information, thereby updating the configuration as necessary;

in addition, there is also a case where a change in interest of the UE occurs during handover execution, that is, during a procedure of disconnecting the UE from the source cell or accessing the UE to the target cell, during the change, if the UE updates its own information of interest in the NAS procedure before disconnecting the source cell, the NAS procedure is not always successful, that is, the latest information of interest of the UE may not arrive at the core network device correctly. Therefore, the UE can start N seconds before the UE performs the switching and reach the target cell, if the interest change occurs, the UE needs to perform the NAS process again in the target cell and update the latest interest information to the CN, and therefore the CN can timely and correctly synchronize the information to the target cell.

It should be noted that, when the service that the terminal is interested in is at least two types of services, when the UE satisfies more than one candidate target cell of the conditional handover execution condition, a certain priority policy needs to be considered to determine the final target cell. The following description is based on different cases.

Case 1: when the UE receives Broadcast service and unicast service simultaneously, if two candidate cells satisfying the condition handover execution condition are both available, one candidate cell may only support unicast service, and the other candidate cell may only support multicast service, where the UE selection rule may be as follows: and the UE preferentially selects the cell capable of supporting the broadcast service according to the priority of the UE for the broadcast service and the unicast service if the broadcast service has higher priority, and otherwise, selects the cell capable of supporting the unicast service.

Case 2: when the UE receives only multicast service, such priority processing is not required, the candidate target cell is necessarily a cell capable of supporting multicast service, otherwise the source cell does not select it as a candidate.

Case 3: when the UE receives the multicast service and the unicast service simultaneously, if two candidate cells satisfying the condition handover execution condition are both available, one candidate cell may only support the unicast service, and the other candidate cell may only support the multicast service, the UE selection rule may be as follows: and the UE preferentially selects the cell capable of supporting the multicast service according to the priority of the UE for the multicast service and the unicast service, if the multicast service has higher priority, and otherwise, selects the cell capable of supporting the unicast service.

Case 4: when the UE receives the broadcast service and the multicast service simultaneously, if two candidate cells satisfy the condition for performing conditional handover, one candidate cell may only support the broadcast service, and the other candidate cell may only support the multicast service, the UE selection rule may be as follows: the UE preferentially selects a cell capable of supporting the multicast service according to the priority of the UE for the multicast service and the broadcast service, and otherwise selects the cell capable of supporting the broadcast service; alternatively, if only the broadcast cell is supported, it means that the UE can be released back to idle state for broadcast service reception.

Case 5: if the UE receives broadcast service, multicast service and Unicast service simultaneously, and if two candidate target cells satisfying the condition for performing conditional handover are selected, one candidate target cell may only support part of the broadcast service, and the other candidate target cell may only support the rest of the broadcast service, the UE selection rule may be as follows: the UE firstly finds the highest priority according to the unicast, the broadcast and the multicast, the priority access can support the highest priority, if not, the UE finds the next highest priority, and so on.

Optionally, different services in the unicast, different services of the broadcast, and different services of the multicast may also be subjected to a certain priority ranking, and the selection rule is also that a cell that can be supported by the highest priority service is preferentially selected, and then the rest is done; or, to find a cell capable of accommodating more high-priority services, in short, the specific selection may be implemented based on the UE, and is not described in detail herein.

Referring to fig. 3, fig. 3 is a flowchart of another conditional switching processing method according to an embodiment of the present application, and as shown in fig. 3, the method includes the following steps:

step 301, a network side device sends a first reconfiguration signaling to a terminal, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first reconfiguration signaling is used for determining, in the M candidate cells, N candidate cells that satisfy a condition handover execution condition when the terminal is in a connected state to receive a first service; the first service comprises at least one of a broadcast service and a multicast service which are interested by the terminal; wherein M and N are positive integers, and M is more than or equal to N.

Optionally, the first reconfiguration signaling further includes the conditional handover execution condition.

Optionally, the first configuration information includes at least one of:

a MBS service list supported by the candidate cell;

a list of broadcast services supported by the candidate cell;

first MBS SIB information;

first multicast control channel, MCCH, information.

Optionally, when the first service is a broadcast service, the first configuration information carries a second version identifier, where the second version identifier includes an identifier value associated with a first object, and the first object includes at least one of the following items: MBS SIB information, MCCH information and Temporary Mobile Group Identification (TMGI) service configuration.

Optionally, the multicast service configuration information carries a third version identifier, where the third version identifier is associated with a second object, and the second object is a temporary mobile group identifier TMGI or a group radio network temporary identifier G-RNTI.

Optionally, the method further comprises:

the network side equipment records the corresponding relation between the terminal and the multicast service configuration information;

and under the condition that the multicast service configuration information is updated, the network side equipment sends the updated multicast service configuration information to the terminal.

Optionally, in a case that the service in which the terminal is interested is updated from the first service to a second service, the method further includes:

the network side equipment acquires the second service reported by the terminal through a Radio Resource Control (RRC) signaling;

or, when the first service is a multicast service, the network side device obtains the second service reported by the terminal through a non-access stratum NAS layer signaling.

Optionally, the method further comprises:

the network side equipment sends the second service to a plurality of candidate cells;

the network side equipment receives second configuration information sent by each candidate cell based on the second service;

and the network side equipment sends a second reconfiguration signaling to the terminal, wherein the second reconfiguration information comprises the second configuration information, and the second reconfiguration signaling is used for updating the first configuration information of the candidate cell.

Optionally, before the step of sending the first reconfiguration signaling to the terminal, the method further includes:

the network side equipment receives the first service sent by the terminal;

the network side equipment sends the first service to a plurality of candidate cells;

and the network side equipment determines the first reconfiguration signaling according to the first configuration information sent by each candidate cell based on the first service.

Optionally, comprising:

a first receiving module, configured to receive a first reconfiguration signaling sent by a source cell when a terminal is in a connected state to receive a first service, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in;

a first determining module, configured to determine, among the M candidate cells, N candidate cells that satisfy a conditional handover execution condition;

an execution module, configured to select a target cell from the N candidate cells to execute an access procedure;

wherein M and N are positive integers, and M is more than or equal to N.

Optionally, the target cell satisfies at least one of:

under the condition that the number of first candidate cells meeting a first preset condition exists in the N candidate cells and is greater than 1, the target cell is a cell determined from a plurality of first candidate cells based on a first preset rule;

Optionally, the first preset rule includes at least one of:

It should be noted that, this embodiment is used as an implementation of the network-side device corresponding to the embodiment shown in fig. 2, and specific implementation thereof may refer to relevant descriptions of the embodiment shown in fig. 2 and achieve the same beneficial effects, and details are not described here to avoid repeated descriptions.

It should be noted that, in the condition switching processing method provided in the embodiment of the present application, the execution main body may be a condition switching processing apparatus, or a control module for executing the condition switching processing method in the condition switching processing apparatus. In the embodiment of the present application, a condition switching processing apparatus executing a condition switching processing method is taken as an example, and the condition switching processing apparatus provided in the embodiment of the present application is described.

Referring to fig. 4, fig. 4 is a structural diagram of a condition switching processing apparatus according to an embodiment of the present application, and as shown in fig. 4, a condition switching processing apparatus 400 includes:

a first receiving module 401, configured to receive a first reconfiguration signaling sent by a source cell when a terminal is in a connected state and receives a first service, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in;

a first determining module 402, configured to determine, among the M candidate cells, N candidate cells that satisfy a conditional handover execution condition;

an executing module 403, configured to execute an access procedure in the N candidate cells to select a target cell;

wherein M and N are positive integers, and M is more than or equal to N.

Optionally, the target cell satisfies at least one of:

Optionally, the first preset rule includes at least one of:

determining the target cell based on the number of the target services supported by each first candidate cell, wherein the target cell supports the maximum number of the target services;

Optionally, in a case that the first service includes at least two types of services among a multicast service, a broadcast service, and a unicast service, and the N candidate cells do not have a second candidate cell that supports the at least two types of services at the same time, the target cell is determined based on priorities of the at least two types of services, and the target cell supports at least one type of service with a highest priority supported by the N candidate cells among the at least two types of services.

Optionally, the executing module 403 is further configured to execute at least one of:

Optionally, the executing module 403 is specifically configured to execute at least one of the following:

under the condition that the first service is a broadcast service, reading information of an information block SIB (system information block) of a multicast broadcast service MBS (multicast broadcast service) in the target cell, acquiring service configuration of the first service, and continuously receiving the first service in a broadcast mode in the target cell;

Optionally, the first configuration information includes at least one of:

a MBS service list supported by the candidate cell;

a list of broadcast services supported by the candidate cell;

first MBS SIB information;

first multicast control channel, MCCH, information.

Optionally, the conditional switching processing apparatus 400 further includes:

an obtaining module, configured to obtain a first version identifier of the target cell when the first service is a broadcast service; acquiring a broadcast service configuration associated with an identification value corresponding to the first version identifier under the condition that the identification value corresponding to the first version identifier is different from an identification value corresponding to a second version identifier carried by the first configuration information;

wherein the first version identification and the second version identification each comprise an identification value associated with a first object comprising at least one of: MBS SIB information, MCCH information and Temporary Mobile Group Identification (TMGI) service configuration.

Optionally, the second version identifier includes at least one of a first identifier value associated with MBS SIB information, a second identifier value associated with MCCH information, and a third identifier value associated with TMGI service configuration.

an obtaining module, configured to obtain a fourth version identifier of the target cell, where the fourth version identifier is associated with the second object;

a first sending module, configured to send target information to the target cell when an identifier value corresponding to the fourth version identifier is different from an identifier value corresponding to the third version identifier, where the target information is used to update the multicast service configuration information.

Optionally, the conditional handover processing apparatus 400 further includes a first sending module, configured to, in a case that the service in which the terminal is interested is updated from the first service to a second service, perform the following operations:

reporting the second service to the source cell through Radio Resource Control (RRC) signaling; or, reporting the second service to a core network device through a non-access stratum NAS layer signaling when the first service is a multicast service.

Optionally, the first receiving module 401 is further configured to: and receiving a second reconfiguration signaling sent by the source cell based on the second service, wherein the second reconfiguration signaling is used for updating the first configuration information of the candidate cell.

Optionally, the first sending module is further configured to update, within a preset time period before the first reconfiguration signaling is received, a service in which the terminal is interested from the first service to a second service, and report the second service when the terminal is accessed to the target cell;

the first receiving module 401 is further configured to receive the second service in the target cell.

a first sending module, configured to report the first service to the source cell through radio resource control RRC signaling; or, reporting the first service to a core network device through a non-access stratum NAS layer signaling when the first service is a multicast service.

The condition switching processing apparatus provided in this embodiment of the present application can implement each process in the method embodiment of fig. 2, and is not described here again to avoid repetition.

Referring to fig. 5, fig. 5 is a structural diagram of another condition switching processing apparatus according to an embodiment of the present application, and as shown in fig. 5, a condition switching processing apparatus 500 includes:

a second sending module 501, configured to send a first reconfiguration signaling to a terminal, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first reconfiguration signaling is used for determining, in a case where the terminal is in a connected state and receives a first service, N candidate cells that meet a condition handover execution condition among the M candidate cells; the first service includes at least one of a broadcast service and a multicast service of interest to the terminal.

Optionally, the first configuration information includes at least one of:

a MBS service list supported by the candidate cell;

a list of broadcast services supported by the candidate cell;

first MBS SIB information;

first multicast control channel, MCCH, information.

Optionally, the conditional switching processing apparatus 500 further includes:

a recording module, configured to record a correspondence between the terminal and the multicast service configuration information;

the second sending module 501 is configured to send the updated multicast service configuration information to the terminal when the multicast service configuration information is updated.

Optionally, the conditional switching processing apparatus 500 further includes: the second receiving module is configured to, when the service that the terminal is interested in is updated from the first service to a second service, perform the following operations:

under the condition that the service which the terminal is interested in is updated to a second service from the first service, acquiring the second service reported by the terminal through a Radio Resource Control (RRC) signaling; or, when the first service is a multicast service, acquiring the second service reported by the terminal through a non-access stratum (NAS) layer signaling.

Optionally, the second sending module 501 is further configured to: the network side equipment sends the second service to a plurality of candidate cells;

the second receiving module is further configured to receive second configuration information sent by each candidate cell based on the second service;

the second sending module 501 is further configured to: and sending second reconfiguration signaling to the terminal, wherein the second reconfiguration information comprises the second configuration information, and the second reconfiguration signaling is used for updating the first configuration information of the candidate cell.

the second receiving module is used for receiving the first service sent by the terminal;

the second sending module 501 is further configured to send the first service to multiple candidate cells;

a second determining module, configured to determine the first reconfiguration signaling according to the first configuration information sent by each candidate cell based on the first service.

The condition switching processing apparatus provided in this embodiment of the present application can implement each process in the method embodiment of fig. 3, and is not described here again to avoid repetition.

The condition switching processing device in the embodiment of the present application may be a device, a device or an electronic apparatus having an operating system, or may be a component, an integrated circuit, or a chip in a terminal. The device can be a mobile terminal or a non-mobile terminal. For example, the mobile terminal may include, but is not limited to, the above-listed type of terminal 11, and the non-mobile terminal may be a server, a Network Attached Storage (NAS), a Personal Computer (PC), a Television (TV), a teller machine, a kiosk, or the like, and the embodiments of the present application are not limited in particular.

The condition switching processing apparatus provided in the embodiment of the present application can implement each process implemented in the method embodiments of fig. 2 to fig. 3, and achieve the same technical effect, and is not described here again to avoid repetition.

Optionally, as shown in fig. 6, an embodiment of the present application further provides a communication device 600, which includes a processor 601, a memory 602, and a program or an instruction stored in the memory 602 and executable on the processor 601, where the program or the instruction is executed by the processor 601 to implement each process of the foregoing embodiment of the condition switching processing method, and can achieve the same technical effect, and is not described herein again to avoid repetition.

The embodiment of the present application further provides a terminal, including a processor and a communication interface, where the communication interface is configured to receive a first reconfiguration signaling sent by a source cell when the terminal is in a connected state to receive a first service, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in; the processor is configured to determine N candidate cells satisfying a conditional handover execution condition among the M candidate cells; selecting a target cell from the N candidate cells to execute an access process; wherein M and N are positive integers, and M is more than or equal to N. The terminal embodiment corresponds to the terminal-side method embodiment, and all implementation processes and implementation manners of the method embodiment can be applied to the terminal embodiment and can achieve the same technical effect. Specifically, fig. 7 is a schematic diagram of a hardware structure of a terminal for implementing various embodiments of the present application.

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

Those skilled in the art will appreciate that the terminal 700 may further include a power supply (e.g., a battery) for supplying power to the various components, and the power supply may be logically connected to the processor 710 via a power management system, so as to manage charging, discharging, and power consumption management functions 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 those shown, or combine some components, or have a different arrangement of components, and will not be described again here.

It should be understood that in the embodiment of the present application, the input Unit 704 may include a Graphics Processing Unit (GPU) and a microphone, and the Graphics Processing Unit processes image data of still pictures or videos obtained by an image capturing device (such as a camera) in a video capturing mode or an image capturing mode. The display unit 706 may include a display panel, which 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 a touch panel and other input devices. Touch panels, also known as touch screens. The touch panel may include two parts of a touch detection device and a touch controller. Other input devices may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described in detail herein.

In the embodiment of the present application, the radio frequency unit 701 receives downlink data from a network side device and then processes the downlink data in the processor 710; in addition, the uplink data is sent to the network side equipment. In general, radio frequency unit 701 includes, but is not limited to, an antenna, at least one 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 as well as various data. The memory 109 may mainly include a storage program or instruction area and a storage data area, wherein the storage program or instruction area may store an operating system, an application program or instruction (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. In addition, the Memory 709 may include a high-speed random access Memory and a non-transitory Memory, wherein the non-transitory Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable PROM (EPROM), an Electrically Erasable Programmable ROM (EEPROM), or a flash Memory. Such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device.

Processor 710 may include one or more processing units; alternatively, the processor 710 may integrate an application processor, which primarily handles operating system, user interface, and applications or instructions, etc., and a modem processor, which primarily handles wireless communications, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into processor 710.

The radio frequency unit 701 is configured to receive a first reconfiguration signaling sent by a source cell when a terminal is in a connected state to receive a first service, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in;

a processor 710 configured to determine N candidate cells satisfying a conditional handover execution condition among the M candidate cells; selecting a target cell from the N candidate cells to execute an access process;

wherein M and N are positive integers, and M is more than or equal to N.

In the embodiment of the application, when a terminal receives a first service in a connected state, the terminal receives a first reconfiguration signaling sent by a source cell, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first service includes at least one of a broadcast service and a multicast service that the terminal is interested in; the terminal determines N candidate cells meeting a condition switching execution condition in the M candidate cells; and the terminal selects a target cell from the N candidate cells to execute an access process. Therefore, when the conditional switch is carried out, the candidate cell of at least part of the first service can be selected as the target cell to carry out the conditional switch, thereby effectively ensuring the continuity of MBS service transmission. Therefore, the embodiment of the application can improve the reliability of MBS service transmission in the process of conditional switching of the terminal.

Optionally, the target cell satisfies at least one of:

Optionally, the first preset rule includes at least one of:

Optionally, in a case that the first service includes at least two types of services among a multicast service, a broadcast service, and a unicast service, and the N candidate cells do not have a second candidate cell that simultaneously supports the at least two types of services, the target cell is determined based on priorities of the at least two types of services, and the target cell supports at least one type of service with a highest priority supported by the N candidate cells among the at least two types of services.

Optionally, the radio frequency unit 701 is further configured to perform at least one of:

Optionally, the radio frequency unit 701 is specifically configured to perform at least one of the following:

Optionally, the first configuration information includes at least one of:

a MBS service list supported by the candidate cell;

a list of broadcast services supported by the candidate cell;

third indication information, configured to indicate whether a candidate cell supports a broadcast service that is interested in the terminal;

first MBS SIB information;

first multicast control channel, MCCH, information.

Optionally, the radio frequency unit 701 is further configured to:

under the condition that the first service is a broadcast service, acquiring a first version identifier of the target cell; under the condition that the identification value corresponding to the first version identification is different from the identification value corresponding to the second version identification carried by the first configuration information, acquiring the broadcast service configuration associated with the identification value corresponding to the first version identification;

Optionally, the radio frequency unit 701 is further configured to: acquiring a fourth version identification of the target cell, wherein the fourth version identification is associated with the second object; and under the condition that the identification value corresponding to the fourth version identification is different from the identification value corresponding to the third version identification, sending target information to the target cell, wherein the target information is used for updating the multicast service configuration information.

Optionally, the radio frequency unit 701 is further configured to, in a case that the service in which the terminal is interested is updated from the first service to a second service, perform the following operations:

reporting the second service to the source cell through Radio Resource Control (RRC) signaling; or, reporting the second service to a core network device through NAS layer signaling of a non-access stratum when the first service is a multicast service.

Optionally, the radio frequency unit 701 is further configured to: and receiving second reconfiguration signaling sent by the source cell based on the second service, wherein the second reconfiguration signaling is used for updating the first configuration information of the candidate cell.

Optionally, the radio frequency unit 701 is further configured to update, within a preset time period before the first reconfiguration signaling is received, a service in which the terminal is interested from the first service to a second service, and report the second service when the target cell is accessed;

the radio frequency unit 701 is further configured to receive the second service in the target cell.

a first sending module, configured to report the first service to the source cell through radio resource control RRC signaling; or reporting the first service to core network equipment through non-access stratum (NAS) layer signaling under the condition that the first service is a multicast service.

The embodiment of the present application further provides a network side device, which includes a processor and a communication interface, where the communication interface is configured to send a first reconfiguration signaling to a terminal, where the first reconfiguration signaling includes first configuration information of M candidate cells, and the first reconfiguration signaling is used for determining, in a case where the terminal is in a connected state and receives a first service, N candidate cells that satisfy a conditional handover execution condition among the M candidate cells; the first service includes at least one of a broadcast service and a multicast service of interest to the terminal. The embodiment of the network side device corresponds to the embodiment of the method of the network side device, and all implementation processes and implementation modes of the embodiment of the method can be applied to the embodiment of the network side device and can achieve the same technical effect.

Specifically, the embodiment of the application further provides a network side device. As shown in fig. 8, the network-side device 800 includes: antenna 801, radio frequency device 802, baseband device 803. The antenna 801 is connected to a radio frequency device 802. In the uplink direction, the rf device 802 receives information via the antenna 801 and sends the received information to the baseband device 803 for processing. In the downlink direction, the baseband device 803 processes information to be transmitted and transmits the information to the radio frequency device 802, and the radio frequency device 802 processes the received information and transmits the processed information through the antenna 801.

The above band processing means may be located in the baseband means 803, and the method performed by the network side device in the above embodiment may be implemented in the baseband means 803, where the baseband means 803 includes a processor 804 and a memory 805.

The baseband apparatus 803 may include, for example, at least one baseband board, on which a plurality of chips are disposed, as shown in fig. 8, where one of the chips, for example, the processor 804, is connected to the memory 805 to call up the program in the memory 805 to perform the network side device operation shown in the above method embodiment.

The baseband device 803 may further include a network interface 806, such as a Common Public Radio Interface (CPRI), for exchanging information with the radio frequency device 802.

Specifically, the network side device in the embodiment of the present application further includes: the instructions or programs stored in the memory 805 and capable of being executed on the processor 804 are called by the processor 804 to execute the method executed by each module shown in fig. 5, and achieve the same technical effect, which is not described herein for avoiding repetition.

The embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or the instruction is executed by a processor, the program or the instruction implements each process of the foregoing conditional switching processing method embodiment, and can achieve the same technical effect, and in order to avoid repetition, details are not repeated here.

The processor is the processor in the electronic device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and so on.

The embodiment of the present application further provides a chip, where the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is configured to execute a program or an instruction to implement each process of the foregoing condition switching processing method embodiment, and can achieve the same technical effect, and is not described here again to avoid repetition.

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

The embodiment of the present application further provides a program product, where the program product is stored in a non-transitory storage medium, and the program product is executed by at least one processor to implement each process of the embodiment of the method for processing conditional switching, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here.

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 phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element. Further, it should be noted that the scope of the methods and apparatus of the embodiments of the present application is not limited to performing the functions in the order illustrated or discussed, but may include performing the functions in a substantially simultaneous manner or in a reverse order based on the functions involved, e.g., the methods described may be performed in an order different than that described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

Through the description of the foregoing embodiments, it is clear to those skilled in the art that the method of the foregoing embodiments may be implemented by software plus a necessary general hardware platform, and certainly may also be implemented by hardware, but in many cases, the former is a better implementation. Based on such understanding, the technical solutions of the present application or portions thereof that contribute to the prior art may be embodied in the form of a computer software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a base station) to execute the method according to the embodiments of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the present embodiments are not limited to those precise embodiments, which are intended to be illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope of the appended claims.

Claims

1. A conditional access processing method, comprising:

wherein M and N are positive integers, and M is more than or equal to N.

2. The method of claim 1, wherein the target cell satisfies at least one of:

3. The method according to claim 2, wherein the first preset rule comprises at least one of:

4. The method of claim 1, wherein the first reconfiguration signaling further comprises the conditional handover execution condition.

5. The method of claim 1, wherein in case the first traffic comprises at least two types of traffic among multicast traffic, broadcast traffic, and unicast traffic, and the N candidate cells do not have a second candidate cell that supports the at least two types of traffic at the same time, the target cell is determined based on priorities of the at least two types of traffic, and the target cell supports at least one type of traffic with highest priority among the at least two types of traffic.

6. The method of claim 5, wherein the priority of the multicast traffic, the priority of the broadcast traffic, and the priority of the unicast traffic satisfy any one of the following:

the multicast traffic, the broadcast traffic and the unicast traffic have different priorities;

7. The method according to claim 1, wherein after the step of the terminal performing the access procedure on the N candidate cell selection target cells, the method further comprises at least one of:

under the condition that the target cell supports the first service, the terminal continuously receives the first service through the target cell;

8. The method of claim 7, wherein continuing to receive the first service at the target cell comprises at least one of:

9. The method of claim 1, wherein the first configuration information comprises at least one of:

the first indication information is used for indicating whether the candidate cell supports MBS service or not;

a MBS service list supported by the candidate cell;

a list of broadcast services supported by the candidate cell;

first MBS SIB information;

first multicast control channel, MCCH, information.

10. The method according to claim 1, wherein in case that the first service is a broadcast service, after the terminal performs an access procedure on the N candidate cell selection target cells, the method further comprises:

the terminal acquires a first version identification of the target cell;

wherein the first version identification and the second version identification each comprise an identification value associated with a first object comprising at least one of: MBS SIB information, MCCH information and Temporary Mobile Group Identity (TMGI) service configuration.

11. The method of claim 10, wherein the second version identification comprises at least one of a first identification value associated with MBS SIB information, a second identification value associated with MCCH information, and a third identification value associated with TMGI service configuration.

12. The method of claim 1, wherein the first configuration information comprises multicast service configuration information in case that the first service is multicast service.

13. The method of claim 12, wherein the multicast service configuration information carries a third version id, and wherein the third version id is associated with a second object, and wherein the second object is a Temporary Mobile Group Identity (TMGI) or a group radio network temporary identity (G-RNTI).

14. The method according to claim 13, wherein after the step of the terminal performing the access procedure on the N candidate cell selection target cells, the method further comprises:

15. The method of claim 1, wherein in case that the service of interest to the terminal is updated from the first service to a second service, the method further comprises:

or, the terminal reports the second service to a core network device through NAS layer signaling of a non-access stratum under the condition that the first service is a multicast service.

16. The method of claim 15, wherein after the terminal reports the second service to the source cell through Radio Resource Control (RRC) signaling, the method further comprises:

17. The method according to claim 15, wherein in case that the service interested by the terminal is updated from the first service to a second service within a preset time period before the first reconfiguration signaling is received, the method further comprises:

and the terminal receives the second service in the target cell.

18. The method according to claim 1, wherein before the step of the terminal receiving the first reconfiguration signaling sent by the source cell, the method further comprises:

the terminal reports the first service to the source cell through Radio Resource Control (RRC) signaling; alternatively, the first and second electrodes may be,

and under the condition that the first service is the multicast service, the terminal reports the first service to core network equipment through non-access stratum (NAS) layer signaling.

19. A conditional access processing method, comprising:

a network side device sends a first reconfiguration signaling to a terminal, wherein the first reconfiguration signaling comprises first configuration information of M candidate cells, and the first reconfiguration signaling is used for determining N candidate cells meeting a condition switching execution condition in the M candidate cells under the condition that the terminal is in a connected state and receives a first service; the first service comprises at least one of a broadcast service and a multicast service which are interested by the terminal; wherein M and N are positive integers, and M is more than or equal to N.

20. The method of claim 19, wherein the first reconfiguration signaling further comprises the conditional handover execution condition.

21. The method of claim 19, wherein the first configuration information comprises at least one of:

a MBS service list supported by the candidate cell;

a list of broadcast services supported by the candidate cell;

first MBS SIB information;

first multicast control channel, MCCH, information.

22. The method of claim 19, wherein in a case that the first service is a broadcast service, the first configuration information carries a second version id, the second version id includes an identifier value associated with a first object, and the first object includes at least one of: MBS SIB information, MCCH information and Temporary Mobile Group Identification (TMGI) service configuration.

23. The method of claim 19, wherein in the case that the first service is a multicast service, the first configuration information comprises multicast service configuration information.

24. The method of claim 23, wherein the multicast service configuration information carries a third version id, and wherein the third version id is associated with a second object, and wherein the second object is a Temporary Mobile Group Identity (TMGI) or a group radio network temporary identity (G-RNTI).

25. The method of claim 23, further comprising:

26. The method of claim 19, wherein in case that the service of interest to the terminal is updated from the first service to a second service, the method further comprises:

27. The method of claim 26, further comprising:

28. The method according to claim 19, wherein before the step of the network side device sending the first reconfiguration signaling to the terminal, the method further comprises:

the network side equipment receives the first service sent by the terminal;

29. A conditional switch processing apparatus, comprising:

wherein M and N are positive integers, and M is more than or equal to N.

30. The apparatus of claim 29, wherein the target cell satisfies at least one of:

31. The apparatus of claim 30, wherein the first preset rule comprises at least one of:

32. A conditional switch processing apparatus, comprising:

33. The apparatus of claim 32, wherein in a case that the first service is a broadcast service, the first configuration information carries a second version identifier, the second version identifier includes an identifier value associated with a first object, and the first object includes at least one of: MBS SIB information, MCCH information and Temporary Mobile Group Identification (TMGI) service configuration.

34. The apparatus of claim 32, wherein the first configuration information comprises multicast service configuration information in case that the first service is multicast service.

35. The apparatus of claim 34, wherein the multicast service configuration information carries a third version id, and wherein the third version id is associated with a second object, and wherein the second object is a Temporary Mobile Group Identity (TMGI) or a group radio network temporary identity (G-RNTI).

36. A terminal, comprising: memory, processor and program stored on the memory and executable on the processor, which when executed by the processor implements the steps in the conditional switch handling method of any of claims 1 to 18.

37. A network-side device, comprising: memory, processor and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implements the steps in the conditional switch processing method according to any of claims 19 to 28.

38. A readable storage medium, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the conditional switch processing method according to any one of claims 1 to 28.