WO2023051114A1 - 一种通信方法及装置 - Google Patents

一种通信方法及装置 Download PDF

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Publication number
WO2023051114A1
WO2023051114A1 PCT/CN2022/114612 CN2022114612W WO2023051114A1 WO 2023051114 A1 WO2023051114 A1 WO 2023051114A1 CN 2022114612 W CN2022114612 W CN 2022114612W WO 2023051114 A1 WO2023051114 A1 WO 2023051114A1
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Prior art keywords
information
mbs
cell
access network
terminal device
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PCT/CN2022/114612
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English (en)
French (fr)
Inventor
沙桐
李秉肇
常俊仁
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华为技术有限公司
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Publication of WO2023051114A1 publication Critical patent/WO2023051114A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method and device.
  • a terminal device in an idle state or an inactive state can measure the signal quality of the serving cell and neighboring cells. If the signal quality of the serving cell is poor and the signal quality of the neighboring cell is good, the terminal device can actively Reselecting a cell with better signal quality as the serving cell is called cell reselection.
  • MBS service is a service for multiple terminal devices, such as live broadcast service, public safety service, batch software update service, etc.
  • the present application provides a communication method and device for improving the continuity of MBS services.
  • the present application provides a communication method, and the execution subject of the method may be a terminal device, or may be a chip or a circuit, or a device or module in the terminal device.
  • the method includes: sending first information to an access network device corresponding to the serving cell, wherein the first information is used to request MBS configuration information of neighboring cells of the serving cell; and receiving second information from the access network device, the second information It includes MBS configuration information of at least one neighboring cell of the serving cell.
  • the terminal device Compared with the terminal device after reselecting to the adjacent cell (new cell) of the serving cell, it reads the MBS dedicated system information of the new cell to obtain the configuration information of the MBS control channel, and then reads the MBS control channel to obtain the new cell
  • the terminal device can request the MBS configuration information of the neighboring cell in the serving cell, so that the MBS configuration information of the neighboring cell can be obtained in advance, and there is no need to obtain the MBS configuration information of the cell after reselecting to a new cell.
  • Control channel MBS control channel, MCCH
  • the terminal device may send the first information when a trigger condition is met.
  • the trigger condition may include: there is a cell whose signal quality satisfies a preset condition in a neighboring cell of the serving cell.
  • the trigger condition may include: there is at least one cell whose signal quality meets the preset condition in the neighboring cells of the serving cell, or there are N cells whose signal quality meets the preset condition in the neighboring cells of the serving cell, that is, the serving cell's
  • the number of cells whose signal quality meets the preset condition in the neighboring cell is greater than or equal to N, where N is a positive integer greater than 1, or the proportion of cells whose signal quality meets the preset condition in the neighboring cell of the serving cell is greater than or equal to the threshold value , such as a ratio greater than 0.2.
  • the trigger condition may further include: the signal quality of the serving cell within the time interval T is less than or equal to the fifth threshold.
  • the cell whose signal quality meets the preset condition includes at least one of the following:
  • the second type of cell whose signal quality is greater than the signal quality of the serving cell within the time interval T;
  • a third type of cell whose signal quality is greater than or equal to a third threshold within the time interval T;
  • a third type of cell whose signal quality is greater than that of the serving cell within the time interval T;
  • a fourth type of cell whose signal quality is greater than or equal to a fourth threshold within the time interval T;
  • the first type of cell includes at least one of the following: a cell with a different frequency point with a higher priority than the service frequency point, and a cell with a different system frequency point with a higher priority than the service frequency point;
  • the second type of cell is a cell with different frequency points with the same priority as the service frequency point;
  • the third type of cell is a cell with the same frequency as the service frequency
  • the fourth type of cell includes at least one of the following: a cell of a different frequency point with a lower priority than the serving frequency point, and a cell of a different system frequency point with a lower priority than the serving frequency point.
  • the first information carries an identifier of at least one cell whose signal quality meets a preset condition.
  • the identifier of the at least one cell whose signal quality meets the preset condition may be the identifier of all the cells in the cells whose signal quality meets the preset condition, or the identifiers of some cells in the cells whose signal quality meets the preset condition.
  • the first information is carried in random access message 3 or random access message 5 .
  • the third information from the access network device may be received, and the third information is used to notify the MCCH change; receiving the second information from the access network device
  • the information includes: receiving the second information in the MCCH.
  • the third information carries indication information, and the indication information is used to instruct the MCCH to change the MBS configuration information used for broadcasting neighboring cells.
  • the terminal device can receive the MCCH according to its own needs to obtain the second information, and this method helps to reduce power consumption of the terminal device.
  • the present application provides a communication method, and the execution body of the method may be an access network device, or may be a chip or a circuit, or a device or module in the access network device.
  • the method includes: receiving first information from a terminal device and sending second information to the terminal device, wherein the first information is used to request multicast broadcast service MBS configuration information of neighboring cells of the serving cell, and the second information includes at least MBS configuration information of a neighboring cell.
  • the terminal device Compared with the terminal device after reselecting to the adjacent cell (new cell) of the serving cell, it reads the MBS dedicated system information of the new cell to obtain the configuration information of the MBS control channel, and then reads the MBS control channel to obtain the new cell
  • the terminal device can request the MBS configuration information of the neighboring cell in the serving cell, so that the MBS configuration information of the neighboring cell can be obtained in advance, and there is no need to obtain the cell MCCH after reselecting to a new cell. , so as to reduce the time delay of obtaining the MBS configuration information of the new cell when moving, and improve the continuity of the MBS service.
  • the first information carries an identifier of at least one cell.
  • the first information is carried in random access message 3 or random access message 5 .
  • third information may be sent to the terminal device, where the third information is used to notify the MCCH change.
  • Sending the second information to the terminal device includes: sending the second information in the MCCH.
  • the third information carries indication information, and the indication information is used to instruct the MCCH to change the MBS configuration information used for broadcasting neighboring cells.
  • the terminal device can receive the MCCH according to its own needs to obtain the second information, and this method helps to reduce power consumption of the terminal device.
  • the present application provides a communication method, and the execution body of the method may be a terminal device, or may be a chip or a circuit, or a device or module in the terminal device.
  • the method includes: determining that the first frequency satisfies a preset condition, wherein the preset condition includes that some or all of the candidate cells on the first frequency can provide the first MBS service; or, the preset condition includes that the candidate cells on the first frequency
  • the number or proportion of candidate cells capable of providing the first MBS service is greater than a threshold value; the first frequency is determined to be the frequency with the highest priority in cell reselection evaluation.
  • a judgment condition about the candidate cell on the first frequency providing the current MBS service is added, which can reduce the reselection of the terminal device to a degree that does not support the current MBS service.
  • the probability of the cell which can improve the continuity of the broadcast service.
  • radio resource control radio resource control
  • the method before determining that the first frequency satisfies the preset condition, the method further includes: acquiring first information, where the first information is used to indicate that the first MBS service is provided on the first frequency by Some cells provide the first MBS service.
  • the terminal device may reselect to a cell that does not support the MBS service that the terminal device wants to receive during cell reselection.
  • the judgment condition for determining the first frequency as the highest priority frequency in cell reselection is added, that is, the "candidate cells on the first frequency
  • Some or all of the candidate cells that can provide the first MBS service, or the number or proportion of candidate cells that can provide the first MBS service among the candidate cells on the first frequency is greater than the threshold value"
  • the first frequency is the frequency with the highest priority according to the existing judgment conditions, and the existing method for determining the frequency with the highest priority can be reused as much as possible, and the modification to the protocol is minor.
  • the first information is carried in the system information of the serving cell, or the first information is included in a user service description (USD) provided by the application layer or the service layer of the terminal device.
  • USD user service description
  • the terminal device may also receive second information, where the second information carries a list of cells capable of providing the first MBS service.
  • the terminal device may acquire the PCIs of one or more candidate cells on the first frequency, and a list of PCIs of neighboring cells capable of providing the first MBS service.
  • the terminal device can determine whether the first frequency satisfies the preset condition by comparing the PCI of the candidate cell with the PCI list of the neighboring cell.
  • the present application provides a communication method, and the execution subject of the method may be a terminal device, or may be a chip or a circuit, or a device or module in the terminal device.
  • the method includes: determining to receive the multicast broadcast service MBS service on N frequency points, wherein, N is an integer greater than 1; determining the frequency point with the highest priority in cell reselection evaluation according to the MBS services provided by the N frequency points respectively.
  • the terminal equipment preferentially camps on the frequency point that can provide more MBS services during the cell reselection process, so as to ensure the continuity of more MBS services; or, the highest priority can be guaranteed first
  • the continuity of the MBS service; or, the continuity of the currently ongoing MBS service can be guaranteed first.
  • the frequency point with the highest priority may satisfy the following condition: the number of MBS services that can be provided is the largest.
  • the frequency point with the highest priority may satisfy the following condition: the MBS service that can be provided has the highest priority.
  • the frequency point with the highest priority may satisfy the following condition: it can provide the first MBS service, and the first MBS service is the MBS service currently being received by the terminal device.
  • the continuity of the currently ongoing MBS service can be guaranteed first.
  • the terminal device can first determine the frequency point that can provide the most MBS services that the terminal device is receiving or is interested in as a high-priority frequency point. If there are multiple frequency points that can provide the same number of MBS services, select Among them, the frequency corresponding to the highest MBS service priority is the highest priority.
  • the terminal device first determines the frequency point where the MBS service with the highest priority is located as the high priority frequency point. If there are multiple frequency points with the same priority, select one of the frequency points that the terminal device is receiving or is interested in. The frequency point with the most MBS services is the highest priority.
  • the present application provides a communication method, and the execution body of the method may be a terminal device, or may be a chip or a circuit, or a device or module in the terminal device.
  • the method includes: sending first information to an access network device, where the first information includes information for requesting a first SI message (SI message) and information for requesting a first SIB or MCCH, where the first SIB carries In an SI message, the first SIB is used to configure the MCCH; the MCCH from the access network device is received, wherein the MCCH carries MBS configuration information.
  • SI message SI message
  • SIB a first SIB or MCCH
  • the terminal device can only request the SI message, and the access network device receives the request , it is not known whether the request is for the first SIB or other SIBs (such as SIB2-SIB14) in the SI message.
  • the access network device by explicitly indicating that the request is for the first SIB, that is, the information for requesting the first SIB is included in the first information, so that the access network device can accurately determine the purpose of the terminal device sending the first information It is used to request the first SIB or request MCCH, so that the access network device can start broadcasting MCCH in time, and the terminal device can obtain the configuration information necessary for receiving MBS service and start receiving broadcast data in time, thereby reducing the interruption time of MBS service , To ensure the continuity of the broadcasting business.
  • unnecessary signaling overhead caused by the access network device broadcasting the MCCH when the terminal device is actually requesting the second SIB can also be avoided, saving resources, especially saving control plane radio channel resources.
  • the first SIB may be received from the access network device.
  • the access network equipment can be made to send the configuration information of the MCCH in time, thereby contributing to the continuity of the MBS service.
  • second information may be received from the access network device, where the second information is used to indicate MCCH modification.
  • the terminal device can receive the MCCH in time, so that the continuity of the MBS service can be further improved.
  • the first SI message includes a first SIB and N second SIBs, where N is an integer greater than 0, and the first information may include a first bit corresponding to the first SIB for Indicates that the first SIB is requested.
  • the first information may also include bits corresponding to N second SIBs, respectively indicating whether to request the corresponding second SIB, N is the number of second SIBs included in the first SI message, and N is greater than 0 .
  • the present application provides a communication method.
  • the execution body of the method may be an access network device, or may be a chip or a circuit, or a device or module in the access network device.
  • the method includes: receiving first information from a terminal device, where the first information includes information for requesting a first SI message and information for requesting a first SIB, wherein the first SIB is carried in the first SI message, and the first The SIB is used to configure the MCCH; the first SIB is sent to the terminal equipment.
  • the terminal device can only request the SI message, and the access network device, after receiving the request, It is not known whether the request is for the first or other SIB in the SI message.
  • the access network device by explicitly indicating that the request is for the first SIB, that is, the information for requesting the first SIB is included in the first information, so that the access network device can accurately determine the purpose of the terminal device sending the first information It is used to request the first SIB, so that the access network device can start broadcasting MCCH in time, and the terminal device can obtain the configuration information necessary for receiving broadcast services in time and start receiving broadcast data, thereby reducing the time of MBS service interruption and ensuring broadcast business continuity.
  • unnecessary signaling overhead caused by the access network device broadcasting the MCCH when the terminal device is actually requesting the second SIB can also be avoided, saving resources, especially saving control plane radio channel resources.
  • second information may be sent to the terminal device, where the second information carries MBS configuration information.
  • the access network equipment can be made to send the MBS configuration information in time, thereby contributing to the continuity of the MBS service.
  • third information may be sent to the terminal device, where the third information is used to indicate MCCH modification; sending the second information to the terminal device includes: sending in the MCCH second information.
  • the first SI message includes a first SIB and N second SIBs, where N is an integer greater than 0, and the first information may include a first bit corresponding to the first SIB for Indicates that the first SIB is requested.
  • the first information may also include bits corresponding to N second SIBs, respectively indicating whether to request the corresponding second SIB, N is the number of second SIBs included in the first SI message, and N is greater than 0 .
  • the embodiment of the present application provides a communication device that can implement the method implemented by the terminal device in the first aspect or the third aspect or the fourth aspect or the fifth aspect or any possible design thereof.
  • the apparatus comprises corresponding units or components for performing the method described above.
  • the units included in the device may be implemented by software and/or hardware.
  • the apparatus may be, for example, a terminal device, or a component or a baseband chip, a chip system, or a processor that can support the implementation of the above method in the terminal device.
  • the communication device may include modular components such as a transceiver unit (or communication module, transceiver module) and a processing unit (or processing module), and these modules may perform the above-mentioned first aspect or the third aspect or the fourth aspect
  • the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating a transmitter and a receiver.
  • the transceiver unit may include an antenna and a radio frequency circuit, etc.
  • the processing unit may be a processor, such as a baseband chip.
  • the transceiver unit may be a radio frequency unit, and the processing unit may be a processor.
  • the transceiver unit may be an input-output interface of the system-on-a-chip, and the processing unit may be a processor of the system-on-a-chip, such as a central processing unit (CPU).
  • CPU central processing unit
  • the transceiver unit may be used to perform the receiving and/or sending actions performed by the terminal device in the first aspect or the third aspect or the fourth aspect or the fifth aspect or any possible design thereof.
  • the processing unit may be used to perform actions other than receiving and sending performed by the terminal device in the first aspect or the third aspect or the fourth aspect or the fifth aspect or any possible design thereof. For example, determining the first information, determining that there is a cell whose signal quality satisfies a preset condition in the neighboring cells of the serving cell, and the like. In another example, it is determined that the first frequency satisfies a preset condition, and it is determined that the first frequency is a frequency with the highest priority during cell reselection evaluation, and the like. For another example, it is determined to receive MBS on N frequency points, and the frequency point with the highest priority in cell reselection evaluation is determined according to the MBS services respectively provided by the N frequency points. Another example is to determine the first information and so on.
  • the embodiment of the present application provides a communication device that can implement the method implemented by the access network device in the second aspect or the sixth aspect or any possible design thereof.
  • the apparatus comprises corresponding units or components for performing the method described above.
  • the units included in the device may be implemented by software and/or hardware.
  • the apparatus may be, for example, an access network device, or a component or a baseband chip, a chip system, or a processor that can support the implementation of the above method in the access network device.
  • the communication device may include modular components such as a transceiver unit (or a communication module, a transceiver module) and a processing unit (or a processing module), and these modules may implement the second aspect or the sixth aspect or any of the above-mentioned Corresponding functions of the access network equipment in a possible design.
  • the transceiver unit may be a transmitter and a receiver, or a transceiver obtained by integrating a transmitter and a receiver.
  • the transceiver unit may include an antenna and a radio frequency circuit, etc.
  • the processing unit may be a processor, such as a baseband chip.
  • the transceiver unit When the communication device is a component having the functions of the above access network equipment, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor.
  • the transceiver unit When the communication device is a system-on-a-chip, the transceiver unit may be an input-output interface of the system-on-a-chip, and the processing unit may be a processor of the system-on-a-chip, such as a CPU.
  • the transceiver unit may be used to perform the receiving and/or sending action performed by the access network device in the second aspect or the sixth aspect or any possible design thereof.
  • the processing unit may be used to perform actions other than receiving and sending performed by the access network device in the second aspect or the sixth aspect or any possible design thereof. Such as determining the second information and so on. Another example is to determine the first SIB and so on.
  • a communication system includes a communication device that executes the method shown in the first aspect or any possible design thereof, and executes the method shown in the second aspect or any possible design thereof method of communication means.
  • a communication system in a tenth aspect, includes a communication device for performing the method shown in the third aspect or any possible design thereof, and may further include an access network device.
  • a communication system in an eleventh aspect, includes a communication device for performing the method shown in the fourth aspect or any possible design thereof, and may further include an access network device.
  • a communication system in a twelfth aspect, includes a communication device performing the method shown in the fifth aspect or any possible design thereof, and executing the method described in the sixth aspect or any possible design thereof The communication device of the method shown.
  • a computer-readable storage medium the computer-readable storage medium is used for storing computer instructions, and when the computer instructions are run on a computer, the computer is made to perform the above-mentioned first to sixth aspects or its Any one of the possible designs is shown in the method.
  • a fourteenth aspect there is provided a computer program product containing instructions.
  • the computer program product is used to store computer instructions.
  • the computer instructions When the computer instructions are run on a computer, the computer executes the first to sixth aspects or any of them.
  • One possible design is shown in the approach.
  • a circuit the circuit is coupled to a memory, and the circuit is used to execute the method shown in the first aspect to the sixth aspect or any possible design thereof.
  • the circuitry may include chip circuitry.
  • FIG. 1 is a multicast schematic diagram of an embodiment of the present application
  • FIG. 2 is a schematic diagram of the architecture of a network system according to an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of an access network device according to an embodiment of the present application.
  • FIG. 6 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • MBS is a service transmitted to multiple terminal devices at the same time, such as live broadcast service, public safety service, batch software update service, etc.
  • MBS may include multicast service, multicast service, broadcast service and so on.
  • the MBS comes from the data server. First, the data server sends the MBS data to the core network device, then the core network device sends the MBS data to the access network device, and finally the access network device sends the MBS data to at least one terminal that receives the MBS. equipment. When the core network device sends MBS data to the access network device, the MBS data is transmitted through a common transmission channel, that is, the MBS session.
  • the access network device When the access network device sends the data to the terminal device, there are two transmission methods: the first One can adopt point to multi-point (point to multi-point, PTM) transmission mode; the second can adopt point to point (point to point, PTP) transmission mode. As shown in Figure 1.
  • PTM point to multi-point
  • PTP point to point
  • MBS is only an exemplary naming of multicast services, and the naming of multicast services may be different under different communication standards.
  • multicast services may be called Multimedia broadcast multicast service (multimedia broadcast multicast service, MBMS), multicast service in new air interface (new radio, NR) can be called MBS, in future communication development, multicast service can also be named other, this application does not Be specific.
  • Cell reselection A terminal device in the RRC idle state/inactive state will measure the signal quality of the serving cell and neighboring cells. If the signal quality of the serving cell is poor and the signal quality of the neighboring cell is good, the terminal device will Actively reselect a cell with higher priority or better signal quality as the serving cell. This process is called cell reselection.
  • the process of cell reselection includes starting neighbor cell measurement (judging whether to start neighbor cell measurement according to the measurement start conditions), reselection evaluation judgment (judging whether the signal quality of the neighbor cell meets the cell reselection standard, if it meets the cell reselection, execute cell reselection, otherwise it will still stay In the current cell), cell reselection execution (receiving the system message of the target cell, and camping in the new cell if the target cell has no access restrictions) three stages.
  • the signal quality can be reference signal received power (reference signal received power, RSRP), or measured cell RX level value (Measured cell RX level value, Q rxlevmea ), or reference signal received quality (reference signal received quality, RSRQ), or measured Cell quality value (measured cell quality value, Q qualmeas ), or cell selection reception level value (S rxlev , Cell selection RX level value, unit dB), or cell selection quality value (S qual , Cell selection quality value, unit dB) , or the RSRP measurement quantity Q meas used for cell reselection, or the Rs of the serving cell in the cell ranking criterion, or the Rn of the neighboring cell in the cell ranking criterion, etc., which are not limited in this embodiment of the present application.
  • At least one in the embodiments of this application refers to one or more, and “multiple” refers to two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character "/" generally indicates that the contextual objects are an "or” relationship.
  • At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple .
  • first and second are used to distinguish multiple objects, and are not used to limit the size, content, order, and timing of multiple objects , priority or importance, etc.
  • first threshold and the second threshold are only used to distinguish different thresholds, and do not represent differences in size, priority, or importance of the two thresholds.
  • MBS services are services for multiple terminal devices, such as live broadcast services, public security services, and batch software update services.
  • a terminal device in an idle state or an inactive state can measure the signal quality of the serving cell and neighboring cells. If the signal quality of the serving cell is poor and the signal quality of the neighboring cell is good, the terminal device can actively reselect the priority The cell with the highest or better signal quality is used as the serving cell. This process is called cell reselection. Since the current cell reselection process is performed for unicast services, after the MBS service is introduced, if the existing cell reselection process is continued, the continuity of the MBS service will be affected.
  • the MBS service is configured in a two-step configuration manner: the access network device broadcasts an MBS-specific system message (such as an MBS SIB), and the MBS-specific system message carries MCCH configuration information.
  • the MBS configuration information is then transmitted on the MCCH within the configured transmission window.
  • a terminal device interested in the MBS service enters a cell that provides the above-mentioned MBS dedicated system message, and receives an MCCH change notification, it will obtain the MBS configuration information on the MCCH. Since the MBS configuration information is cell-level configuration information, which can include the ID of the MBS session provided by the cell, configuration and scheduling information of the MBS session, etc., the MBS configuration information carried by the MCCH of each cell may be different.
  • a terminal device in the reselection state When a terminal device in the reselection state performs cell reselection, it needs to read the MBS dedicated system information of the reselected cell to obtain the configuration information of the MCCH after accessing the reselected cell, and then read the MCCH to obtain the MBS configuration information of the reselected cell configuration information.
  • This method causes a large time delay, which causes interruption of the MBS service and affects the continuity of the MBS service.
  • the terminal device adopts the following mechanism to perceive the frequency point/area providing the MBS service: the application layer/service layer of the terminal device provides the user service description (user service description, USD) of the MBS service, where the USD includes MBS session ID such as temporary mobile group identity (temporary mobile group identity, TMGI), session start time and end time, frequency point of MBS session, MBS service area identity (service area identity, SAI), wherein each service area consists of a Composition of group districts.
  • the terminal device uses the following mechanism to perceive the frequency point/area that provides the MBS service: the serving cell broadcasts a system message (such as SIB15), and the MBS SAI of the current frequency point and each adjacent frequency point is provided in the system message.
  • a system message such as SIB15
  • Condition 1 If the serving cell does not broadcast system information (such as SIB15), but the frequency point is the frequency point provided in the USD of this MBS service; if the serving cell broadcasts system information (such as SIB15), then the frequency point broadcast in the system message
  • the SAI of the frequency point includes the SAI indicated for the frequency point in the USD of the MBS service.
  • the terminal device supports single-cell point-to-multipoint transmission (single-cell point-to-multipoint, SC-PTM) reception, and the candidate cell on the frequency point is broadcasting the MBS dedicated system message.
  • SC-PTM single-cell point-to-multipoint
  • SI system message
  • the SI in the NR network is divided into minimum SI and other SI.
  • the minimum SI includes master information block (master information block, MIB) and system information block 1 (system information block 1, SIB1), and other SI contains multiple The SIBs broadcast in the smallest SI (eg SIBs other than SIB1).
  • SIB1 carries the scheduling information of the SI message.
  • Each SI message can carry one or more SIBs.
  • the terminal device can actively request broadcast, that is, request SI on-demand. For example, the terminal device can send an SI request message to the access network device to request an SI message containing the required SI.
  • the MBS SIB carrying MCCH configuration information belongs to other SIs. If the access network device supports on-demand request for SI, the terminal device can request the above MBS SIB in an on-demand manner. However, if the MBS SIB and other SIBs are in one SI message, since the terminal device can only request the SI Message, the access network device does not know whether the request is for the MBS SIB in the SI message or other SIBs after receiving the request.
  • the access network device When the access network device does not broadcast MCCH, for example, the access network device chooses to use On-demand MCCH to send MCCH, when the terminal device requests an SI message, if the access network device only broadcasts the SIB on the SI message instead of broadcasting If the MCCH is not used, the terminal device cannot obtain the MBS configuration information, which will result in the interruption of the MBS service or increase the delay in receiving the MBS service. However, if the access network device starts to broadcast the MCCH every time it receives a request message of the SI message containing the MBS dedicated system message, unnecessary signaling overhead and resource overhead may be brought.
  • embodiments of the present application provide a communication method and device for improving the continuity of MBS services.
  • the method and the device are based on the same inventive concept, and since the principles of the method and the device to solve problems are similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • the communication method provided by this application can be applied to various communication systems, for example, it can be Internet of Things (Internet of Things, IoT), Narrow Band Internet of Things (NB-IoT), LTE, or the first
  • the fifth generation (5th generation, 5G) communication system can also be a hybrid architecture of LTE and 5G, or it can be a new communication system that appears in 6G or future communication development.
  • the 5G communication system described in this application may include at least one of a non-standalone (NSA) 5G communication system and a standalone (standalone, SA) 5G communication system.
  • the communication system may also be a machine to machine (machine to machine, M2M) network, a machine type communication (machine type communication, MTC) or other networks.
  • the communication method provided by the embodiment of the present application can be applied to a communication system, and the communication system includes an access network device and six terminal devices, that is, user equipment (user equipment, UE) 1-UE6.
  • UE1-UE6 can send uplink information to access network equipment, and the access network equipment can receive uplink data sent by UE1-UE6.
  • UE4-UE6 may also form a sub-communication system.
  • Access network devices can send downlink information to UE1, UE2, UE3, and UE5, and UE5 can send downlink information to UE4 and UE6 based on device-to-device (D2D) technology, or between UE4 and UE6 can be based on device-to-device (D2D) technology.
  • D2D device-to-device
  • D2D technologies communicate with each other.
  • inventions of the present application can also be used in other communication systems, as long as multicast transmission is required in the communication system.
  • the embodiments of the application are applicable not only to the scenario where one access network device communicates with multiple UEs, but also to the scenario where multiple access network devices cooperate to communicate with one or more UEs at the same time (for example, a single frequency network (single frequency network) , SFN).
  • Figure 2 is only a schematic diagram, and does not specifically limit the type of the communication system, and the number and type of devices included in the communication system.
  • the terminal equipment shown above may be a UE, a terminal (terminal), an access terminal, a terminal unit, a terminal station, a mobile station (mobile station, MS), a remote station, a remote terminal, a mobile terminal (mobile terminal), a wireless communication device, Terminal agent, terminal equipment, cellular telephone, cordless telephone, session initiation protocol (SIP) telephone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (PDA) equipment, with Handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, terminal devices in future 5G networks or terminal devices in future evolved PLMN networks, etc.
  • Terminal agent terminal equipment
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • the terminal device may have a wireless transceiver function, which can communicate with one or more access network devices of one or more communication systems (such as wireless communication), and accept network services provided by the access network devices.
  • access The network equipment includes but not limited to the access network equipment shown in FIG. 2 .
  • terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; terminal equipment can also be deployed on water (such as ships, etc.); terminal equipment can also be deployed in the air (such as aircraft, balloons and satellites, etc.) .
  • the terminal device may be a mobile phone, a tablet computer (pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal, an augmented reality (augmented reality, AR) terminal, an industrial control (industrial control ), wireless terminals in self driving, wireless terminals in remote medical, wireless terminals in smart grid, wireless terminals in transportation safety , wireless terminals in smart cities, wireless terminals in smart homes, etc.
  • the terminal device may also be a communication chip with a communication module, or a vehicle with a communication function, or a vehicle-mounted device (such as a vehicle-mounted communication device, a vehicle-mounted communication chip), etc.
  • Access network equipment refers to equipment that provides network access functions, such as wireless access network (radio access network, RAN) base station (or RAN equipment) and so on. Access network equipment can be specific Including a base station (base station, BS), or including a base station and a radio resource management device for controlling the base station, etc.
  • the access network device may also include a relay station (relay device), an access point, and a base station in the future 5G network, The base station or NR base station in the future evolution of the PLMN network.
  • the access network device can be a wearable device or a vehicle-mounted device.
  • the access network device can also be a communication chip with a communication module.
  • access network equipment includes but is not limited to: next-generation base station (g nodeB, gNB) in 5G, evolved node B (evolved node B, eNB) in LTE system, radio network controller (radio network controller, RNC) ), the wireless controller under the cloud radio access network (cloud radio access network, CRAN) system, the base station controller (base station controller, BSC), the home base station (for example, home evolved nodeB, or home node B, HNB), Baseband unit (baseBand unit, BBU), transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), mobile switching center, can also be the evolution type (eNB or eNodeB) in LTE , can also be a base station device in a 5G network or an access network device in a future evolved PLMN network, or a wearable device or a vehicle-mounted device.
  • next-generation base station g nodeB, gNB
  • evolved node B evolved node B
  • the access network equipment may include a centralized unit (centralized unit, CU) and a distributed unit (distributed unit, DU).
  • the access network device may also include an active antenna unit (active antenna unit, AAU).
  • the CU implements some functions of the access network equipment, and the DU implements some functions of the access network equipment.
  • the CU is responsible for processing non-real-time protocols and services, and implements RRC and packet data convergence protocol (PDCP) layer functions.
  • the DU is responsible for processing physical layer protocols and real-time services, realizing the functions of the radio link control (radio link control, RLC) layer, media access control (media access control, MAC) layer and physical layer (physical layer, PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical layer
  • the AAU implements some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , or, sent by DU+AAU.
  • the access network device may be a device including one or more of a CU node, a DU node, and an AAU node.
  • the CU can be divided into access network equipment in the RAN, and the CU can also be divided into access network equipment (which can be called CN equipment) in the core network (core network, CN), which is not limited in this application. .
  • the access network equipment can be connected to the CN equipment, and the core network equipment can be used to provide core network services for terminal equipment connected to the access network equipment.
  • Core network devices may correspond to different devices in different systems.
  • the core network equipment can correspond to the serving GPRS support node (SGSN) of general packet radio service (GPRS) and/or the gateway GPRS Support Node (GGSN) of GPRS .
  • the core network equipment may correspond to a mobility management entity (mobility management entity, MME) and/or a serving gateway (serving gateway, S-GW), etc.
  • core network equipment can correspond to access and mobility management function (access and mobility management function, AMF) entity, session management function (session management function, SMF) entity or user plane function (user plane function, UPF) entity, etc. .
  • Fig. 3 shows a possible structural schematic diagram of the device.
  • the device shown in Figure 3 may be a communication device, or a chip applied in a communication device, or other combined devices, components (or components) having functions of the communication device shown in this application, etc., wherein the communication device may be the communication device of this application
  • the access network device shown in the embodiment or may also be the terminal device shown in the embodiment of the present application.
  • the device may include a processing module 310 and a transceiving module 320 .
  • the transceiver module 320 may be a functional module, and the functional module can complete both the sending operation and the receiving operation.
  • the transceiver module 320 may be used to perform all sending operations and receiving operations performed by the communication device.
  • the transceiver module 320 can be considered as a sending module, and when the receiving operation is performed, the transceiver module 320 can be considered as a receiving module; or, the transceiver module 320 can also be two functional modules, and the transceiver module 320 can be regarded as the two A general term for two functional modules, the two functional modules are the sending module and the receiving module, the sending module is used to complete the sending operation, for example, the sending module can be used to perform all the sending operations performed by the communication device, and the receiving module is used to complete the receiving Operation, the receiving module may be used to perform all receiving operations performed by the communication device.
  • the transceiver module 320 may include a transceiver and/or a communication interface.
  • Transceivers may include antennas and radio frequency circuits, among others.
  • the communication interface is such as an optical fiber interface.
  • the processing module 310 may be a processor, such as a baseband processor, and the baseband processor may include one or more CPUs.
  • the transceiver module 320 may be a radio frequency unit, and the processing module 310 may be a processor, such as a baseband processor.
  • the transceiver module 320 may be an input/output interface of a chip (such as a baseband chip), and the processing module 310 may be a processor of the system-on-a-chip, and may include one or more central processing units.
  • processing module 310 in the embodiment of the present application may be implemented by a processor or a processor-related circuit component
  • transceiver module 320 may be implemented by a transceiver or a transceiver-related circuit component.
  • the processing module 310 can be used to perform all the operations performed by the access network device in the embodiment of the present application except the transceiving operation , such as processing operations, and/or other processes used to support the techniques described herein.
  • the transceiver module 320 may be used to perform all receiving and sending operations performed by the access network device in the embodiment of the present application, and/or to support other processes of the technology described herein.
  • the processing module 310 can be used to perform all the operations performed by the terminal device in the embodiment of the application except the sending and receiving operations, such as processing operation, and/or other processes for supporting the technology described herein, such as determining that there is a cell whose signal quality satisfies a preset condition in the neighboring cells of the serving cell.
  • the transceiver module 320 may be used to perform all the receiving and sending operations performed by the terminal device in the embodiment of the present application, and/or to support other processes of the technologies described herein.
  • Fig. 4 shows another possible structural diagram of a terminal device.
  • the communication device includes structures such as a processor, a memory, a radio frequency unit (or radio frequency circuit), an antenna, and an input and output device.
  • the processor is mainly used to process communication protocols and communication data, control devices, execute software programs, process data of software programs, and the like.
  • Memory is primarily used to store software programs and data.
  • the radio frequency unit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • Antennas are mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, and keyboards, are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal equipment may not have input and output devices.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.
  • FIG. 4 only one memory and processor are shown in FIG. 4 . In an actual terminal device product, there may be one or more processors and one or more memories.
  • a memory may also be called a storage medium or a storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit with the transceiver function can be regarded as the transceiver unit of the terminal equipment (the transceiver unit can be a functional unit, and the functional unit can realize the sending function and the receiving function; or, the transceiver unit can also be It includes two functional units, namely a receiving unit capable of receiving functions and a sending unit capable of transmitting functions), and the processor with processing functions is regarded as the processing unit of the terminal device.
  • the terminal device includes a transceiver unit 410 and a processing unit 420 .
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like.
  • a processing unit may also be called a processor, a processing board, a processing module, a processing device, and the like.
  • the device in the transceiver unit 410 for realizing the receiving function may be regarded as a receiving unit
  • the device in the transceiver unit 410 for realizing the sending function may be regarded as a sending unit, that is, the transceiver unit 410 includes a receiving unit and a sending unit.
  • the transceiver unit may sometimes also be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may sometimes be called a receiver, a receiver, or a receiving circuit, etc.
  • the sending unit may sometimes be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the transceiver unit 410 may correspond to the transceiver module 320 , or in other words, the transceiver module 320 may be implemented by the transceiver unit 410 .
  • the transceiver unit 410 is configured to perform the sending operation and the receiving operation of the terminal device in the embodiments shown in this application, and/or other processes for supporting the technologies described herein.
  • the processing unit 420 may correspond to the processing module 310, or in other words, the processing module 310 may be realized by the processing unit 420.
  • the processing unit 420 is configured to perform other operations on the terminal device in the embodiment shown in this application except the transceiving operation, for example, to perform all receiving and sending operations performed by the terminal device in the embodiment shown in this application, and/or or other processes used to support the techniques described herein.
  • Fig. 5 shows another possible structural diagram of an access network device.
  • the access network device includes structures such as a processor, a memory, a radio frequency unit (or radio frequency circuit) or an antenna.
  • the processor is mainly used to process communication protocols and communication data, control access network devices, execute software programs, and process data of software programs.
  • Memory is primarily used to store software programs and data.
  • the radio frequency unit is mainly used for the conversion of the baseband signal and the radio frequency signal and the processing of the radio frequency signal.
  • the access network device may include a transceiver unit 510 and a processing unit 520, wherein the transceiver unit 510 may include a sending unit and a receiving unit, or the transceiver unit 510 may be a unit.
  • the transceiving unit 510 may correspond to the transceiving module 320 in FIG. 3 , that is, the transceiving unit 510 performs the actions performed by the transceiving module 320 .
  • the transceiver unit 510 may also be called a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 511 and a radio frequency unit 512 .
  • the transceiver unit 510 is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals.
  • the processing unit 520 is mainly used to perform baseband processing, control access network equipment, and the like.
  • the transceiver unit 510 and the processing unit 520 may be physically set together, or physically separated, that is, distributed access network equipment.
  • the transceiver unit 510 may include one or more radio frequency units, such as a remote radio unit (remote radio unit, RRU), and the processing unit 520 may include one or more BBUs (also referred to as DUs).
  • RRU remote radio unit
  • BBUs also referred to as DUs
  • the processing unit 520 may be composed of one or more single boards, and multiple single boards may jointly support a wireless access network of a single access standard (such as an LTE network), or may separately support wireless access networks of different access standards. Radio access network (such as LTE network, 5G network or other networks).
  • the processing unit 520 also includes a memory 521 and a processor 522 .
  • the memory 521 is used to store necessary instructions and data.
  • the processor 522 is used to control the access network device to perform necessary actions, for example, to control the access network device to execute the operation procedures related to the access network device in the embodiments shown in this application.
  • the memory 521 and the processor 522 may serve one or more single boards. That is to say, memory and processors can be set independently on each single board. It may also be that multiple single boards share the same memory and processor. In addition, necessary circuits can also be set on each single board.
  • the network architecture and business scenarios described in the embodiments of the present application are for more clearly illustrating the technical solutions of the embodiments of the present application, and do not constitute limitations on the technical solutions provided by the embodiments of the present application. With the evolution of architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this application are also applicable to similar technical problems.
  • the MBS service may also be called “MBS service”, “MBS broadcast service”, “MBS session”, “MBS broadcast service”, “MBS” and so on.
  • frequency and "frequency point" can be replaced with each other.
  • FIG. 6 it is a schematic flowchart of a communication method provided by the present application. The method includes:
  • the terminal device sends first information to the access network device corresponding to the serving cell.
  • the access network device receives the first information.
  • the first information is used to request MBS configuration information of neighboring cells of the serving cell.
  • the terminal device may send the first information to the access network device on the serving cell.
  • the access network device corresponding to the serving cell may refer to the access network device that implements the function of the serving cell.
  • the serving cell may also be a cell where the terminal device currently resides (or accesses).
  • the adjacent cell refers to a cell adjacent to the serving cell, or a cell at a frequency adjacent to the current serving frequency, where the serving frequency is the frequency of the cell where the terminal device currently resides.
  • the terminal device may send the first information when a trigger condition is met.
  • the trigger condition may include: there is a cell whose signal quality satisfies a preset condition in a neighboring cell of the serving cell.
  • the terminal device may send the first information when it is determined that there is a cell whose signal quality meets a preset condition in a neighboring cell of the serving cell.
  • the trigger condition may include: there is at least one cell whose signal quality satisfies a preset condition among the neighboring cells of the serving cell.
  • the trigger condition may include: there are N cells whose signal quality meets the preset condition in the neighboring cells of the serving cell, that is, the number of cells whose signal quality meets the preset condition in the neighboring cells of the serving cell is greater than or equal to N, in an example , the terminal device may determine that there are N cells whose signal quality meets the preset condition in the neighboring cells of the serving cell, that is, when the number of cells whose signal quality meets the preset condition in the neighboring cells of the serving cell is greater than or equal to N, send For the first information, N is an integer greater than 1.
  • the trigger condition may include: the ratio of cells whose signal quality meets the preset condition in the neighboring cells of the serving cell is greater than or equal to a threshold value, for example, the ratio is greater than 0.2.
  • a threshold value for example, the ratio is greater than 0.2.
  • the cell whose signal quality meets the preset condition may include, but is not limited to, at least one of the following:
  • the first type of cell whose signal quality is greater than or equal to the first threshold within the time interval T, wherein the first type of cell includes: a cell with a different frequency point with a higher priority than the service frequency point, a cell with a different frequency point with a higher priority than the service frequency point The cell of the system frequency point, etc.;
  • the second type of cell whose signal quality is greater than or equal to the second threshold within the time interval T, wherein the second type of cell includes: a cell with a different frequency point with the same priority as the service frequency point, a cell with a different frequency point with the same priority as the service frequency point The cell of the system frequency point, etc.;
  • the second type of cell whose signal quality is greater than the signal quality of the serving cell within the time interval T;
  • the third type of cells whose signal quality is greater than or equal to the third threshold within the time interval T may include: cells with the same frequency as the service frequency;
  • a third type of cell whose signal quality is greater than that of the serving cell within the time interval T;
  • the fourth type of cells whose signal quality is greater than or equal to the fourth threshold within the time interval T may include: cells with different frequency points lower in priority than the service frequency point, cells with lower priority than the service frequency point Cells with different system frequencies, etc.
  • the trigger condition may further include: the signal quality of the serving cell within the time interval T is less than or equal to the fifth threshold.
  • the first threshold, the second threshold, the third threshold, the fourth threshold, and the fifth threshold may be the same or different, which are not specifically limited here.
  • the above thresholds can be fixed in the protocol, or obtained by receiving signaling from the access network device, where the signaling can be high-level signaling such as RRC layer signaling, MAC layer signaling, etc., or the signaling can be It is physical layer signaling, such as downlink control information (DCI), or a combination of high-level signaling and physical layer signaling, which is not limited by the embodiments of the present application.
  • DCI downlink control information
  • the first information is used to trigger the access network device to send the MBS configuration information of the neighboring cells of the serving cell, and the access network device specifically sends the MBS configuration information of the neighboring cells, which may be the terminal device Indicated by the first information, for example, the first information may carry an identifier of at least one neighboring cell.
  • the MBS configuration information of the neighboring cells to be sent by the access network device may also be determined by the access network device itself.
  • the first information may carry the identifier of at least one neighboring cell of the serving cell, specifically, may carry at least An identifier of a cell whose signal quality satisfies a preset condition.
  • the identifier of the at least one cell whose signal quality meets the preset condition may be the identifier of all the cells in the cells whose signal quality meets the preset condition, or the identifiers of some cells in the cells whose signal quality meets the preset condition.
  • the identity of the cell may be a physical cell identity (physical cell identity, PCI) or the like.
  • the first information may not carry the identifier of the neighboring cell.
  • the access network device may determine which neighboring cell's MBS configuration information is sent by the access network device.
  • the first information may also carry MBS session identification information requested by the terminal device, such as TMGI, and/or MBS session ID.
  • the access network device may send the MBS configuration information corresponding to the MBS session identifier information.
  • the access network device sends the second information to the terminal device.
  • the terminal device receives the second information.
  • the second information includes MBS configuration information of at least one neighboring cell of the serving cell.
  • the MBS configuration information may be MBS broadcast configuration information in the 3GPP protocol, or may be MBS-related configuration information in future communication development, such as MBS multicast configuration information, MBS-specific configuration information, and the like.
  • the MBS configuration information of the neighboring cell may include at least one of the following: an ongoing MBS session identifier (identification, ID) of the neighboring cell, a group radio network temporary identifier (G-RNTI), a broadcast MBS radio bearer (MBS radio bearer, MRB) configuration, MBS traffic channel (MBS traffic channel, MTCH) scheduling information, etc.
  • ID an ongoing MBS session identifier
  • G-RNTI group radio network temporary identifier
  • MBS radio bearer MRB
  • MBS traffic channel MBS traffic channel
  • MTCH MBS traffic channel scheduling information
  • the access network device may obtain the MBS configuration information of the neighboring cell through the X2 interface or operations administration & maintenance (operations administration&maintenance, OAM) and other methods.
  • OAM operations administration & maintenance
  • the serving cell and the neighboring cell belong to the same access network device, or the DU corresponding to the serving cell and the DU corresponding to the neighboring cell are connected to the same CU, then the access network device corresponding to the serving cell can Obtain the MBS configuration information of the neighboring cell.
  • the terminal device Compared with the terminal device after reselecting to the adjacent cell (new cell) of the serving cell, it reads the MBS dedicated system information of the new cell to obtain the configuration information of the MBS control channel, and then reads the MBS control channel to obtain the new cell
  • the terminal device can request the MBS configuration information of the neighboring cell in the serving cell, so that the MBS configuration information of the neighboring cell can be obtained in advance, and there is no need to obtain the cell MCCH after reselecting to a new cell. , so as to reduce the time delay of obtaining the MBS configuration information of the new cell when moving, and improve the continuity of the MBS service.
  • the sending time of the first information may be earlier than the completion of cell reselection, or the sending time of the first information may be before the terminal equipment camps on the reselected cell, for example, the sending time of the first information may be earlier than The time when the terminal equipment receives the system information block (such as SIB1) of the reselected cell.
  • SIB1 system information block
  • the terminal device when the terminal device is in an idle state or an inactive state, it sends the first information to the access network device corresponding to the serving cell when the foregoing trigger condition is met.
  • the first information may be indicated by the random access message 3 or the random access message 5, for example, the first information may be carried in the random access message 3 or the random access message 5.
  • the random access message 3 may be an RRC establishment request message (RRCSetupRequest), or an RRC recovery request message (RRCResumeRequest), or an RRC reestablishment request message (RRCReestablishmentRequest), etc.
  • the random access message 5 may be an RRC setup complete message (RRCSetupComplete) or an RRC recovery complete message (RRCResumeComplete), or an RRC reestablishment complete message (RRCReestablishmentComplete), etc.
  • the first information may be indicated by random access message 1, for example, the terminal device may indicate the first information by using a dedicated preamble (preamble) or a dedicated random access channel opportunity (RACH occasion, RO).
  • preamble a dedicated preamble
  • RACH occasion a dedicated random access channel opportunity
  • the second information may be carried in the MCCH, that is, the terminal device may receive the second information in the MCCH.
  • the access network device may send third information to the terminal device before sending the second information, where the third information is used to notify the MCCH change, for example, the third information may be MCCH change notify.
  • the MCCH change notification indicated by the third information is used to indicate that the content of the current MCCH is changed.
  • the third information when the third information notifies that the MCCH is changed, it may not indicate the changed MCCH, or may also indicate the changed MCCH, which is not specifically limited here.
  • the third information may also carry indication information, and the indication information is used to instruct the MCCH to change the MBS configuration information used for broadcasting neighboring cells.
  • the terminal device that wants to receive the MBS configuration information of the neighboring cell can acquire the updated MCCH within the MCCH transmission window according to the configured MCCH repetition period.
  • the third information may also indicate that the MCCH content of the current cell has not been changed or the MBS configuration information of the current cell has not been changed.
  • the terminal device can decide whether to receive the MCCH according to its own needs to obtain the second information. For example, a terminal device that does not want to receive the configuration information of the adjacent cell MCCH or the adjacent cell MBS (for example, a terminal without mobility requirements) may not Deduplication detection and/or reception of MCCH, which helps to reduce power consumption of terminal equipment.
  • the second information may also be sent through dedicated signaling.
  • the access network device may send the second information through the random access message 4, and the random access message 4 may be an RRC recovery message (RRCResume message) or an RRC establishment ( RRCSetup message) or RRC re-establishment (RRCReestablishment message) and so on.
  • the access network device may send the second information by using another RRC message.
  • the terminal device can request the MBS configuration information of the neighboring cell in the serving cell, so that the MBS configuration information of the neighboring cell can be obtained in advance, and there is no need to obtain the MCCH of the cell after reselecting to a new cell, thereby reducing the need to obtain the MBS configuration information when moving.
  • the time delay of the MBS configuration information of the new cell improves the continuity of the MBS service.
  • the access network device can explicitly indicate in the MCCH change notification that the MCCH change is used to provide MBS configuration information of neighboring cells, so that the terminal device can judge whether to The updated MCCH needs to be obtained, so that terminal equipment without mobility requirements can avoid repeatedly receiving the MCCH, and avoid additional power consumption to the terminal equipment.
  • FIG. 7 it is a schematic flowchart of another communication method provided by the present application.
  • the method includes:
  • the terminal device determines that the first frequency satisfies a preset condition.
  • the preset condition includes that some or all of the candidate cells on the first frequency can provide the first MBS service; or, the preset condition includes the number of candidate cells that can provide the first MBS service among the candidate cells on the first frequency Or the ratio is greater than the threshold.
  • the terminal device may determine whether the candidate cell on the first frequency can provide the first MBS service in the following manner: the terminal device receives second information, and the second information carries a list of cells capable of providing the first MBS service.
  • the terminal device can obtain the PCI of one or more candidate cells on the first frequency by measuring the synchronization signal and physical broadcast channel block (synchronization signal and PBCH block, SSB) of the neighboring cell.
  • the terminal device acquires the list of neighboring cells capable of providing the first MBS service through the neighboring cell information carried in the MCCH broadcast by the serving cell.
  • the terminal device can determine whether the first frequency satisfies the preset condition by comparing the PCI of the candidate cell on the first frequency with the PCI list of neighboring cells providing the first MBS service.
  • the preset conditions may also include the following conditions:
  • Condition 1 If the serving cell does not broadcast a system message (such as SIB15) for MBS service continuity, but the first frequency is the frequency provided in the USD of this MBS service; if the serving cell broadcasts a system message for MBS service continuity system message (such as SIB15), the one or more identifiers of the frequency point broadcast in the system message include the identifier provided in the USD of this MBS service, or one or more identifiers of the frequency point broadcast in the system message The ID is the same as the identifier provided in the USD of this MBS service, and the identifier can be at least one of MBS session ID, or TMGI, or MBS session group identifier, or TMGI group identifier, or service area identifier, or cell group identifier , or a combination of the above.
  • a system message such as SIB15
  • SIB15 system message for MBS service continuity system message
  • the SIB1 of the candidate cell on the first frequency includes the scheduling information of the first SIB; or the candidate cell on the first frequency can provide the first SIB, wherein the first SIB is used to configure the MCCH SIBs, such as the first SIB is the MBS SIB.
  • Condition three the terminal device is receiving or is interested in receiving the first MBS service, and can only camp on the first frequency to receive the first MBS service.
  • the terminal device determines that the first frequency is the frequency with the highest priority during cell reselection evaluation.
  • the terminal device may also use a cell capable of providing the first MBS service on the first frequency as a high priority cell during cell reselection.
  • a cell capable of providing the first MBS service on the first frequency as a high priority cell during cell reselection.
  • the terminal device does not change the priority of the cell during cell reselection.
  • the terminal device may reselect to a cell that does not support the MBS service that the terminal device wants to receive during cell reselection.
  • the condition that the candidate cell on the first frequency provides the current MBS service is added, which can reduce the reselection of the terminal device to a cell that does not support the current MBS service to a certain extent. The probability, which can improve the continuity of the MBS third information.
  • the embodiment of the present application can effectively prevent terminal devices from accessing a cell that cannot provide the MBS service that the terminal device wants to receive , which can effectively avoid the occurrence of cell congestion in the above situation.
  • the terminal device may execute the method shown in FIG. 7 under the condition that the mode of providing the first MBS service on the first frequency is to provide the first MBS service on some cells of the first frequency.
  • the terminal device may determine the manner in which the first MBS service is provided on the first frequency in the following manner: the terminal device may obtain a system message broadcast by the access network device for service continuity of the MBS service (For example, SIB15) Determine the way to provide the first MBS service on the first frequency.
  • the system message broadcast by the access network device for the continuity of the MBS service may carry the first information, and the first information indicates that the first information is provided on the first frequency. The way of the first MBS service.
  • the access network device may carry frequency information and MBS information corresponding to the frequency in the system information of the serving cell, such as carrying information about MBS services that can be provided by the current frequency and adjacent frequencies, for example, carrying the current frequency and related The MBS service ID and/or TMGI, or the MBS service group ID that can be provided by adjacent frequencies.
  • the access network device also indicates whether the MBS service is deployed on all cells of the frequency or some cells.
  • the manner of providing the first MBS service on the first frequency is indicated by 1 bit information.
  • the access network device may obtain frequency information and MBS information corresponding to the frequency through an X2 interface or OAM.
  • the terminal device may also determine the method of providing the first MBS service on the first frequency in the following manner: the terminal device may obtain the first information from the USD provided by the application layer or the service layer of the terminal device, and the first information indicates that on the first frequency A manner of providing the first MBS service.
  • the terminal device can obtain the frequency for providing MBS services through the USD provided by the application layer or the service layer, and at the same time, the USD also indicates whether the MBS service is deployed on all cells of the frequency, or only on a part of the frequency Community deployment.
  • the manner of providing the first MBS service on the first frequency is indicated by 1 bit information.
  • providing the first MBS service on some cells of the first frequency means that there are cells that cannot provide the first MBS service on the first frequency in a given geographical area, or, the On the first frequency, only cells located in a specific area can provide the first MBS service, and the cells in the specific area may refer to cells deployed with the first MBS service.
  • “Providing the first MBS service on some cells of the first frequency” can also be described as “providing the first MBS service dynamically on the first frequency", “providing the first MBS service on the first frequency according to the cell granularity (per cell)” service", “the first MBS service is deployed on the first frequency according to the cell” and so on.
  • Providing the first MBS service on all cells on the first frequency means that all cells on the first frequency in a given geographical area can provide the first MBS service.
  • the geographical area may be in the tracking area ( Tracking area, TA), or within the range of the RAN, or within the effective area of the SIB, which is not limited in this embodiment of the present application.
  • Providing the first MBS service on all cells of the first frequency can also be described as “providing the first MBS service non-dynamically (or statically) on the cells of the first frequency", “providing the first MBS service on the first frequency according to frequency granularity" An MBS service", "the first MBS service is deployed on the first frequency according to the frequency” and so on.
  • FIG. 8 it is a schematic flowchart of another communication method provided by the present application.
  • the embodiment of the present application when the terminal device is interested in one or more MBS services on multiple frequency points, the embodiment of the present application designs a frequency point priority judgment mechanism so that the terminal device can A frequency point with the highest priority is determined to camp on first.
  • the method includes:
  • the terminal device determines to receive the MBS service on N frequency points, where N is an integer greater than 1.
  • the terminal device determines a frequency point with the highest priority during cell reselection evaluation according to the MBS services respectively provided by the N frequency points.
  • the frequency point with the highest priority may meet at least one of the following conditions: the number of MBS services that can be provided is the largest; the priority of the MBS services that can be provided is the highest; the first MBS service can be provided, and the first MBS service is The MBS service currently being received by the terminal device.
  • the frequency point that can provide the largest number of MBS services may be selected as the frequency point with the highest priority.
  • the priority of the frequency points may be sorted according to the number of MBS services that the terminal equipment is receiving or is interested in receiving at the frequency point. The more the number of MBS services that can be provided on the frequency point, the higher the priority of the frequency point.
  • the frequency point where the MBS service with the highest priority is located may be selected as the frequency point with the highest priority.
  • the priorities of the frequency points may be sorted according to the priorities of the MBS services provided by the frequency points. The higher the priority of the frequency point capable of providing the MBS service, the higher the priority of the frequency point.
  • an implementation manner is that the priority of the MBS service is provided in the USD, or provided in a system message (such as SIB15) for MBS service continuity.
  • the terminal device may select the frequency point where the currently receiving MBS service is located as the highest priority. For example, when a terminal device starts to be interested in a new MBS service during the process of cell reselection, it will give priority to ensuring the continuity of the currently receiving MBS service. service frequency.
  • the terminal device can select any one of the frequency points as the frequency point with the highest priority, or select a frequency point according to preset rules As the frequency point with the highest priority, for example, the preset rule may be the best signal quality and so on.
  • the terminal device can first determine the frequency point that can provide the most MBS services that the terminal device is receiving or is interested in receiving as a high-priority frequency point.
  • the number of MBS services that can be provided by each frequency point is the same, and the frequency point corresponding to the highest MBS service priority is selected as the highest priority; or, the terminal device first determines the frequency point where the MBS service with the highest priority is located as the high priority frequency point, If there are multiple frequency points with the same priority, the frequency point that can provide the most MBS services that the terminal device is receiving or is interested in receiving is selected as the highest priority.
  • the terminal equipment preferentially camps on a frequency point that can provide a larger number of MBS services during the cell reselection process, thereby ensuring the continuity of more MBS services; or, it can give priority to ensuring the highest Continuity of the priority MBS service; or, priority can be given to ensure the continuity of the currently ongoing MBS service.
  • FIG. 9 it is a schematic flowchart of a communication method provided by the present application.
  • the method includes:
  • the terminal device sends first information to the access network device.
  • the access network device receives the first information.
  • the first information includes information for requesting the first SI message and information for requesting the first SIB, where the first SIB is carried in the first SI message, and the first SIB is used to configure the MCCH, for example, the first The SIB may be the SIB carrying MCCH configuration information.
  • the first SIB may be the MBS SIB, or SIB15, etc.
  • the first information may be an SI request message (RRCSystemInfoRequest).
  • the "information for requesting the first SIB" may also be described as "information for requesting the MCCH”.
  • the first SI message may include a first SIB (such as MBS SIB, SIB15, etc.) and at least one second SIB (such as SIB2 to SIB14).
  • a first SIB such as MBS SIB, SIB15, etc.
  • at least one second SIB such as SIB2 to SIB14.
  • the terminal device can only request the SI message. After receiving the request, the access network device does not know whether the request is for the first SIB or other SIBs in the SI message. SIB (such as the second SIB).
  • the first SIB is requested by explicitly indicating that the first SIB is the MBS SIB used to configure the MCCH, that is, the first information includes the information used to request the first SIB, or the first information includes Including information for requesting MCCH, so that the access network device can accurately determine that the purpose of the terminal device sending the first information is to request the first SIB or to request MCCH, so that the access network device can start broadcasting the MCCH in time , the terminal device can obtain the necessary configuration information for receiving the broadcast service in time and start to receive the broadcast data, thereby reducing the receiving delay of the MBS service, avoiding the interruption of the MBS service, and ensuring the continuity of the MBS service.
  • unnecessary signaling overhead caused by the access network device broadcasting the MCCH when the terminal device is actually requesting the second SIB i.e. non-MBS SIB
  • the terminal device that wants to receive the MBS service may send the first SIB to the access network device
  • One piece of information, for example, the first piece of information is sent through random access message 3.
  • the access network device broadcasts the MCCH, where the MCCH carries MBS configuration information.
  • the terminal device receives the MCCH from the access network device.
  • the access network device may further send the first SIB to the terminal device.
  • the access network device may send second information to the terminal device before sending the MCCH, where the second information is used to notify MCCH modification, for example, the second information may be an MCCH modification notification.
  • the terminal device can receive the MCCH in time, so that the continuity of receiving the MBS service by the terminal device can be further improved.
  • the first information Take the first SI message including the first SIB and N second SIBs as an example, where N is an integer greater than 0, and the first information may include the first bit, where the first bit and Corresponding to the first SIB, used to indicate whether to request the first SIB, for example, if the state of the first bit is 0, it may indicate that the terminal device does not request the first SIB; if the state of the first bit is 1, it may indicate that the terminal device The first SIB is requested.
  • the first bit in the first information may be 1.
  • the first information may include a first bit, where the first bit is used to indicate whether to request the MCCH.
  • the first bit in the first information may be 1.
  • the first information may be as follows:
  • the Requested-SI-List field may include information for requesting the first SI message
  • the Spare field may include information for requesting the first SIB or MCCH, that is, the first bit whose state is 1.
  • the first information may further include bits respectively corresponding to the N second SIBs, respectively indicating whether to request the corresponding second SIBs.
  • N bits respectively corresponding to the N second SIBs may also be included in the Spare field.
  • the access network device supporting MBS service chooses to broadcast MCCH on demand due to resource load, signaling overhead, etc.
  • a terminal device residing in a cell wants to receive MBS service
  • the mechanism of On-demand SI requests the access network device to send the first SIB carrying MCCH configuration, so that the access network device can accurately determine that the purpose of the terminal device sending the first information is to request the first SIB or request MCCH, so that The access network device can start broadcasting MCCH in time, and the terminal device can obtain the configuration information necessary for receiving broadcast services and start receiving broadcast data in time, thereby reducing the delay in receiving MBS services, avoiding interruption of MBS services, and ensuring the continuity of broadcast services.
  • it can also avoid unnecessary signaling overhead caused by the access network device broadcasting the MCCH when the on-demand SI request message sent by the terminal device is actually used to request the second SIB, saving resources, especially saving control plane wireless channels resource.
  • An embodiment of the present application provides a communication device.
  • the communication device may be used to implement the terminal device involved in the foregoing embodiments, and the communication device may include the structure shown in FIG. 3 and/or FIG. 4 .
  • An embodiment of the present application provides a communication device.
  • the communication device may be used to implement the access network equipment involved in the foregoing embodiments, and the communication device may include the structure shown in FIG. 3 and/or FIG. 5 .
  • the communication system may include at least one terminal device and at least one access network device, where the terminal device and the access network device in the communication system may execute the method shown in any one of the above method embodiments.
  • the embodiment of the present application also provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and when the computer program is executed by a computer, the computer can implement any one of the above-mentioned method embodiments. Processes related to end devices or network devices.
  • the embodiment of the present application also provides a computer program product, which is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can realize any one of the above method embodiments shown in the embodiment and the terminal device. Or network device-related processes.
  • the embodiment of the present application also provides a chip or a chip system, the chip may include a processor, and the processor may be used to call programs or instructions in the memory, and execute any one of the above method embodiments shown in the embodiment and the terminal device Or a process related to the first access network device.
  • the system-on-a-chip may include the chip, and other components such as a memory or a transceiver.
  • An embodiment of the present application further provides a circuit, which can be coupled with a memory, and can be used to execute a procedure related to a terminal device or a network device in any one of the foregoing method embodiments.
  • the system-on-a-chip may include the chip, and other components such as a memory or a transceiver.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

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Abstract

本申请提供一种通信方法及装置，用于提高组播广播服务(MBS)服务的连续性。该方法包括：向服务小区对应的接入网设备发送第一信息，其中，第一信息用于请求服务小区的邻区的MBS配置信息；并接收来自接入网设备的第二信息，第二信息包括服务小区的至少一个邻区的MBS配置信息。通过在服务小区请求邻区的MBS配置信息，从而可以提前获得邻区的MBS配置信息，无需在重选到新小区后再获取小区的MBS配置信息，从而可以降低移动时的小区重选时延，提高MBS服务的连续性。

Description

一种通信方法及装置
相关申请的交叉引用
本申请要求在2021年09月29日提交中国专利局、申请号为202111154781.6、申请名称为“一种通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
在移动通信***中，处于空闲态或非激活态的终端设备可以测量服务小区和邻区的信号质量，如果服务小区的信号质量较差，而邻区的信号质量较好，则终端设备可以主动重新选择信号质量更好的小区作为服务小区，这个过程称为小区重选。
随着通信发展，引入了组播广播服务(multicast and broadcast service，MBS)技术，MBS服务(MBS service)是面向多个终端设备的业务，例如直播业务、公共安全业务、批量软件更新业务等。
由于目前小区重选过程是针对单播业务进行的，而针对MBS服务，复用现有的小区重选过程则会影响MBS服务的连续性。
发明内容
本申请提供一种通信方法及装置，用于提高MBS服务的连续性。
第一方面，本申请提供一种通信方法，该方法的执行主体可以是终端设备，也可以是芯片或电路，或者终端设备中的装置或模块。方法包括：向服务小区对应的接入网设备发送第一信息，其中，第一信息用于请求服务小区的邻区的MBS配置信息；并接收来自接入网设备的第二信息，第二信息包括服务小区的至少一个邻区的MBS配置信息。
相比于终端设备在重选到服务小区的相邻小区(新小区)后读取该新小区的MBS专用***消息获取到MBS控制信道的配置信息，再去读取MBS控制信道获得该新小区的MBS配置信息的方式，本申请实施例中，终端设备可以在服务小区请求邻区的MBS配置信息，从而可以提前获得邻区的MBS配置信息，无需在重选到新小区后再获取小区MBS控制信道(MBS control channel，MCCH)，从而可以降低移动时获取新小区MBS配置信息的时延，提高MBS服务的连续性。
一种可能的设计中，终端设备可以在满足触发条件时发送第一信息。其中，触发条件可以包括：服务小区的邻区中存在信号质量满足预设条件的小区。具体的，触发条件可以包括：服务小区的邻区中存在至少一个信号质量满足预设条件的小区，或者，服务小区的邻区中存在N个信号质量满足预设条件的小区，即服务小区的邻区中信号质量满足预设条件的小区的数量大于或等于N，N为大于1的正整数，或者，服务小区的邻区中信号质量满足预设条件的小区的比例大于或等于门限值，比如比例大于0.2。通过上述设计，使得终端设备在重选到新小区之前提前获取新小区的MBS配置信息。
一种可能的设计中，触发条件还可以包括：在时间间隔T内服务小区的信号质量小于或等于第五阈值。通过上述设计，可以避免过早发送请求信息，从而降低终端设备获取邻区的MBS配置信息的次数，从而可以降低终端设备的功耗。
一种可能的设计中，信号质量满足预设条件的小区包括如下至少一项：
在时间间隔T内信号质量大于或等于第一阈值的第一类小区；
在时间间隔T内信号质量大于或等于第二阈值的第二类小区；
在时间间隔T内信号质量大于服务小区的信号质量的第二类小区；
在时间间隔T内信号质量大于或等于第三阈值的第三类小区；
在时间间隔T内信号质量大于服务小区的信号质量的第三类小区；
在时间间隔T内信号质量大于或等于第四阈值的第四类小区；
其中，第一类小区包括如下至少一种：比服务频点优先级高的异频频点的小区、比服务频点优先级高的异***频点的小区；
第二类小区为与服务频点优先级相同的异频频点的小区；
第三类小区为与服务频点相同频点的小区；
第四类小区包括如下至少一种：比服务频点优先级低的异频频点的小区、比服务频点优先级低的异***频点的小区。
一种可能的设计中，第一信息携带至少一个信号质量满足预设条件的小区的标识。具体的，该至少一个信号质量满足预设条件的小区的标识可以是信号质量满足预设条件的小区中所有小区的标识，也可以是信号质量满足预设条件的小区中部分小区的标识。通过上述设计，可以提升接入网设备发送邻区的MBS配置信息的准确性。
一种可能的设计中，第一信息携带在随机接入消息3或随机接入消息5中。
一种可能的设计中，在接收来自接入网设备的第二信息之前，可以接收来自接入网设备的第三信息，第三信息用于通知MCCH更改；接收来自接入网设备的第二信息，包括：在MCCH中接收第二信息。通过上述方式，使得终端设备可以及时接收第二信息，从而可以进一步提升MBS服务的连续性。
一种可能的设计中，第三信息中携带指示信息，指示信息用于指示MCCH更改用于广播邻区的MBS配置信息。通过上述方式，使得终端设备可以根据自己的需求接收MCCH以获取第二信息，该方式有助于降低终端设备的功耗。
第二方面，本申请提供一种通信方法，该方法的执行主体可以是接入网设备，也可以是芯片或电路，或者接入网设备中的装置或模块。方法包括：接收来自终端设备的第一信息并向终端设备发送第二信息，其中，第一信息用于请求服务小区的邻区的组播广播服务MBS配置信息，第二信息包括服务小区的至少一个邻区的MBS配置信息。
相比于终端设备在重选到服务小区的相邻小区(新小区)后读取该新小区的MBS专用***消息获取到MBS控制信道的配置信息，再去读取MBS控制信道获得该新小区的MBS配置信息的方式，本申请实施例中，终端设备可以在服务小区请求邻区的MBS配置信息，从而可以提前获得邻区的MBS配置信息，无需在重选到新小区后再获取小区MCCH，从而可以降低移动时获取新小区MBS配置信息的时延，提高MBS服务的连续性。
一种可能的设计中，第一信息携带至少一个小区的标识。通过上述设计，可以提升接入网设备发送邻区的MBS配置信息的准确性。
一种可能的设计中，第一信息携带在随机接入消息3或随机接入消息5中。
一种可能的设计中，在向终端设备发送第二信息之前，可以向终端设备发送第三信息，第三信息用于通知MCCH更改。向终端设备发送第二信息，包括：在MCCH中发送第二信息。通过上述方式，使得终端设备可以及时接收第二信息，从而可以进一步提升MBS服务的连续性。
一种可能的设计中，第三信息中携带指示信息，指示信息用于指示MCCH更改用于广播邻区的MBS配置信息。通过上述方式，使得终端设备可以根据自己的需求接收MCCH以获取第二信息，该方式有助于降低终端设备的功耗。
第三方面，本申请提供一种通信方法，该方法的执行主体可以是终端设备，也可以是芯片或电路，或者终端设备中的装置或模块。方法包括：确定第一频率满足预设条件，其中，预设条件包括第一频率上的候选小区中的部分或全部能够提供第一MBS服务；或，预设条件包括第一频率上的候选小区中能够提供第一MBS服务的候选小区的数量或比例大于门限值；确定第一频率为小区重选评估时最高优先级的频率。
本申请实施例中，在确定频率是否为最高优先级的频率时增加关于第一频率上的候选小区提供当前MBS服务的判断条件，可以一定程度上降低终端设备重选到不支持当前MBS服务的小区的概率，从而可以提高广播业务连续性。
此外，若大量终端设备请求进入无线资源控制(radio resource control，RRC)连接态通过单播接收MBS服务，则会导致小区拥塞，而本申请实施例可以有效防止终端设备接入到不能提供终端设备想要接收的MBS服务的小区上，可以有效的避免上述情境下小区拥塞的发生。
一种可能的设计中，在确定第一频率满足预设条件之前，方法还包括：获取第一信息，第一信息用于指示第一频率上提供第一MBS服务的方式为在第一频率的部分小区上提供第一MBS服务。
如果第一频率上仅有部分小区上提供第一MBS服务，终端设备在小区重选时可能会重选到不支持终端设备想要接收的MBS服务的小区上。上述设计中通过在第一频率上仅有部分小区上提供第一MBS服务时增加确定第一频率作为小区重选时最高优先级频率的判断条件，即增加“第一频率上的候选小区中的部分或全部能够提供第一MBS服务，或，第一频率上的候选小区中能够提供第一MBS服务的候选小区的数量或比例大于门限值”，在第一频率上全部小区上提供第一MBS服务时根据现有的判断条件确定第一频率是否为最高优先级的频率，可以尽可能的重用现有的确定最高优先级的频率的方式，对协议的改动较小。
一种可能的设计中，第一信息承载在服务小区的***信息中，或者，第一信息包括在终端设备应用层或服务层提供的用户服务描述(USD)中。
一种可能的设计中，终端设备还可以接收第二信息，第二信息携带能够提供第一MBS服务的小区列表。
一种可能的设计中，终端设备可以获取第一频率上的一个或多个候选小区的PCI，以及能够提供第一MBS服务的邻区PCI列表。终端设备可以通过比较候选小区的PCI与邻区PCI列表可以确定第一频率是否满足预设条件。
第四方面，本申请提供一种通信方法，该方法的执行主体可以是终端设备，也可以是芯片或电路，或者终端设备中的装置或模块。方法包括：确定在N个频点上接收组播广播服务MBS服务，其中，N为大于1的整数；根据N个频点分别提供的MBS服务确定 小区重选评估时最高优先级的频点。
通过本申请实施例能够保证终端设备在小区重选过程中，优先驻留到能够提供更多MBS服务的频点上，从而可以保证更多MBS服务的连续性；或者，可以优先保证最高优先级MBS服务的连续性；或者，能够优先保证当前正在进行的MBS服务的连续性。
一种可能的设计中，最高优先级的频点可以满足如下条件：能够提供的MBS服务的数量最多。通过上述设计，可以优先驻留到能够提供更多MBS服务的频点上，从而可以保证更多MBS服务的连续性。
一种可能的设计中，最高优先级的频点可以满足如下条件：能够提供的MBS服务的优先级最高。通过上述设计，可以优先保证最高优先级MBS服务的连续性。
一种可能的设计中，最高优先级的频点可以满足如下条件：能够提供第一MBS服务，第一MBS服务为终端设备当前正在接收的MBS服务。通过上述设计，能够优先保证当前正在进行的MBS服务的连续性。
一种可能的设计中，终端设备可以先确定能够提供终端设备正在接收或感兴趣的MBS服务最多的频点作为高优先级频点，如果存在多个频点能够提供的MBS服务数量相同，选择其中MBS服务优先级最高对应的频点作为最高优先级。
一种可能的设计中，终端设备先确定最高优先级的MBS服务所在的频点作为高优先级频点，若存在多个相同优先级的频点，选择其中能够提供终端设备正在接收或感兴趣的MBS服务最多的频点作为最高优先级。
第五方面，本申请提供一种通信方法，该方法的执行主体可以是终端设备，也可以是芯片或电路，或者终端设备中的装置或模块。方法包括：向接入网设备发送第一信息，第一信息包括用于请求第一SI消息(SI message)的信息以及用于请求第一SIB或MCCH的信息，其中，第一SIB携带在第一SI消息中，第一SIB用于配置MCCH；接收来自接入网设备的MCCH，其中，MCCH携带MBS配置信息。
目前，如果第一SIB(即用于配置MCCH的SIB，如MBS SIB、SIB15等)和其他SIB在同一个SI消息中，终端设备只能请求该SI消息，接入网设备在收到请求后，不知道该请求是针对该SI消息中第一SIB还是其他SIB(比如SIB2-SIB14)。本申请实施例中，通过显式指示请求的是第一SIB，即在第一信息中包括用于请求第一SIB的信息，使得接入网设备可以准确的确定终端设备发送第一信息的目的是用于请求第一SIB或请求MCCH，从而使接入网设备可以及时开始广播MCCH，终端设备能够及时获取接收MBS服务所必需的配置信息并开始接收广播数据，从而可以降低MBS服务中断的时间，保证广播业务连续性。此外，也可以避免当终端设备实际在请求第二SIB时接入网设备广播MCCH带来的不必要的信令开销，节省了资源，尤其是节省控制面无线信道资源。
一种可能的设计中，在向接入网设备发送第一信息之后，可以接收来自接入网设备的第一SIB。通过上述设计，可以使得接入网设备及时发送MCCH的配置信息，从而有助于MBS服务的连续性。
一种可能的设计中，在向接入网设备发送第一信息之后，可以接收来自接入网设备的第二信息，第二信息用于指示MCCH更改。通过上述方式，使得终端设备可以及时接收MCCH，从而可以进一步提升MBS服务的连续性。
一种可能的设计中，第一SI消息包括第一SIB和N个第二SIB，N为大于0的整数，第一信息可以包括第一比特，该第一比特与第一SIB对应，用于指示请求第一SIB。
一种可能的设计中，第一信息还可以包括N个第二SIB分别对应的比特，分别指示是否请求对应的第二SIB，N为第一SI消息包括的第二SIB的数量，N大于0。
第六方面，本申请提供一种通信方法，该方法的执行主体可以是接入网设备，也可以是芯片或电路，或者接入网设备中的装置或模块。方法包括：接收来自终端设备的第一信息，第一信息包括用于请求第一SI消息的信息以及用于请求第一SIB的信息，其中，第一SIB携带在第一SI消息中，第一SIB用于配置MCCH；向终端设备发送第一SIB。
目前，如果第一SIB(即用于配置MCCH的SIB)和其他SIB(比如SIB2-SIB14)在同一个SI消息中，终端设备只能请求该SI消息，接入网设备在收到请求后，不知道该请求是针对该SI消息中第一还是其他SIB。本申请实施例中，通过显式指示请求的是第一SIB，即在第一信息中包括用于请求第一SIB的信息，使得接入网设备可以准确的确定终端设备发送第一信息的目的是用于请求第一SIB，从而使接入网设备可以及时开始广播MCCH，终端设备能够及时获取接收广播业务所必需的配置信息并开始接收广播数据，从而可以降低MBS服务中断的时间，保证广播业务连续性。此外，也可以避免当终端设备实际在请求第二SIB时接入网设备广播MCCH带来的不必要的信令开销，节省了资源，尤其是节省控制面无线信道资源。
一种可能的设计中，在接收来自终端设备的第一信息之后，可以向终端设备发送第二信息，其中，第二信息携带MBS配置信息。通过上述设计，可以使得接入网设备及时发送MBS配置信息，从而有助于MBS服务的连续性。
一种可能的设计中，在接收来自终端设备的第一信息之后，可以向终端设备发送第三信息，第三信息用于指示MCCH更改；向终端设备发送第二信息，包括：在MCCH中发送第二信息。通过上述方式，使得终端设备可以及时接收第二信息，从而可以进一步提升MBS服务的连续性。
一种可能的设计中，第一SI消息包括第一SIB和N个第二SIB，N为大于0的整数，第一信息可以包括第一比特，该第一比特与第一SIB对应，用于指示请求第一SIB。
一种可能的设计中，第一信息还可以包括N个第二SIB分别对应的比特，分别指示是否请求对应的第二SIB，N为第一SI消息包括的第二SIB的数量，N大于0。
第七方面，本申请实施例提供一种通信装置，可以实现上述第一方面或第三方面或第四方面或第五方面或其任一可能的设计中由终端设备实现的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为终端设备、或者为可支持终端设备中实现上述方法的部件或基带芯片、芯片***、或处理器等。
示例性的，该通信装置可包括收发单元(或称通信模块、收发模块)和处理单元(或称处理模块)等等模块化组件，这些模块可以执行上述第一方面或第三方面或第四方面或第五方面或其任一可能的设计中终端设备的相应功能。当通信装置是终端设备时，收发单元可以是发送器和接收器，或发送器和接收器整合获得的收发器。收发单元可以包括天线和射频电路等，处理单元可以是处理器，例如基带芯片等。当通信装置是具有上述终端设备功能的部件时，收发单元可以是射频单元，处理单元可以是处理器。当通信装置是芯片***时，收发单元可以是芯片***的输入输出接口、处理单元可以是芯片***的处理器，例如：中央处理单元(central processing unit，CPU)。
收发单元可用于执行第一方面或第三方面或第四方面或第五方面或其任一可能的设 计中由终端设备执行的接收和/或发送的动作。处理单元可用于执行第一方面或第三方面或第四方面或第五方面或其任一可能的设计中由终端设备执行的接收和发送以外的动作。如，确定第一信息、确定所述服务小区的邻区中存在信号质量满足预设条件的小区等。又如，确定第一频率满足预设条件、确定所述第一频率为小区重选评估时最高优先级的频率等。再如，确定在N个频点上接收MBS、根据所述N个频点分别提供的MBS服务确定小区重选评估时最高优先级的频点等。再如，确定第一信息等。
第八方面，本申请实施例提供一种通信装置，可以实现上述第二方面或第六方面或其任一可能的设计中由接入网设备实现的方法。该装置包括用于执行上述方法的相应的单元或部件。该装置包括的单元可以通过软件和/或硬件方式实现。该装置例如可以为接入网设备、或者为可支持接入网设备中实现上述方法的部件或基带芯片、芯片***、或处理器等。
示例性的，该通信装置可包括收发单元(或称通信模块、收发模块)和处理单元(或称处理模块)等等模块化组件，这些模块可以执行上述第二方面或第六方面或其任一可能的设计中接入网设备的相应功能。当通信装置是接入网设备时，收发单元可以是发送器和接收器，或发送器和接收器整合获得的收发器。收发单元可以包括天线和射频电路等，处理单元可以是处理器，例如基带芯片等。当通信装置是具有上述接入网设备功能的部件时，收发单元可以是射频单元，处理单元可以是处理器。当通信装置是芯片***时，收发单元可以是芯片***的输入输出接口、处理单元可以是芯片***的处理器，例如：CPU。
收发单元可用于执行第二方面或第六方面或其任一可能的设计中由接入网设备执行的接收和/或发送的动作。处理单元可用于执行第二方面或第六方面或其任一可能的设计中由接入网设备执行的接收和发送以外的动作。如确定第二信息等。又如，确定第一SIB等。
第九方面，提供一种通信***，该通信***包括执行第一方面或其任意一种可能的设计中所示的方法的通信装置以及执行第二方面或其任意一种可能的设计中所示的方法的通信装置。
第十方面，提供一种通信***，该通信***包括执行第三方面或其任意一种可能的设计中所示的方法的通信装置，还可以包括接入网设备。
第十一方面，提供一种通信***，该通信***包括执行第四方面或其任意一种可能的设计中所示的方法的通信装置，还可以包括接入网设备。
第十二方面，提供一种通信***，该通信***包括执行第五方面或其任意一种可能的设计中所示的方法的通信装置以及执行第六方面或其任意一种可能的设计中所示的方法的通信装置。
第十三方面，提供一种计算机可读存储介质，该计算机可读存储介质用于存储计算机指令，当该计算机指令在计算机上运行时，使得该计算机执行上述第一方面至第六方面或其任意一种可能的设计中所示的方法。
第十四方面，提供一种包含指令的计算机程序产品，该计算机程序产品用于存储计算机指令，当该计算机指令在计算机上运行时，使得该计算机执行上述第一方面至第六方面或其任意一种可能的设计中所示的方法。
第十五方面，提供一种电路，该电路与存储器耦合，该电路被用于执行上述第一方面至第六方面或其任意一种可能的设计中所示的方法。该电路可包括芯片电路。
附图说明
图1为本申请实施例的一种多播示意图；
图2为本申请实施例的一种网络***的架构示意图；
图3为本申请实施例的一种通信装置的结构示意图；
图4为本申请实施例的一种终端设备的结构示意图；
图5为本申请实施例的一种接入网设备的结构示意图；
图6为本申请实施例的一种通信方法的流程示意图；
图7为本申请实施例的一种通信方法的流程示意图；
图8为本申请实施例的一种通信方法的流程示意图；
图9为本申请实施例的一种通信方法的流程示意图。
具体实施方式
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。方法实施例中的具体操作方法也可以应用于装置实施例或***实施例中。
以下，对本申请实施例中的部分用语进行解释说明，以便于本领域技术人员理解。
1)MBS：MBS是同时面向多个终端设备传输的业务，例如直播业务、公共安全业务、批量软件更新业务等。MBS可以包括组播业务、多播业务、广播业务等。MBS来自数据服务器，首先数据服务器将MBS的数据发送给核心网设备，然后核心网设备将MBS的数据发送给接入网设备，最后接入网设备将MBS的数据发送给接收MBS的至少一个终端设备。核心网设备向接入网设备发送MBS的数据的时候，MBS的数据通过一个公共的传输通道即MBS会话进行传输，而接入网设备向终端设备发送的时候，有两种传输方式：第一种可以采用点到多点(point to multi-point，PTM)传输方式；第二种可以采用点到点(point to point，PTP)传输方式。如图1所示。
需要说明的是，MBS仅是多播业务的一种示例性命名，不同通信制式下对多播业务的命名可以不同，例如，在长期演进(long term evolution，LTE)中多播业务可以称为多媒体广播多播业务(multimedia broadcast multicast service，MBMS)，在新空口(new radio，NR)中多播业务可以称为MBS，在未来通信发展中，多播业务也可以命名为其他，本申请不做具体限定。
2)小区重选：处于RRC空闲态/非激活态的终端设备将测量服务小区和邻区的信号质量，如果服务小区的信号质量较差，而邻区的信号质量较好，则终端设备会主动重新选择优先级更高或信号质量更好的小区作为服务小区，这个过程称为小区重选。小区重选的流程包含启动邻区测量(根据测量启动条件判断是否启动邻区测量)、重选评估判决(判决邻区信号质量是否符合小区重选标准，符合则执行小区重选否则仍驻留在当前小区)、小区重选执行(接收目标小区的***消息，若目标小区无接入限制则驻留到新小区)三个阶段。信号质量可以是参考信号接收功率(reference signal received power，RSRP)，或测量小区接收水平值(Measured cell RX level value，Q rxlevmea)，或参考信号接收质量(reference signal received quality，RSRQ)，或测量小区质量值(measured cell quality value,Q qualmeas)，或小区选择接收水平值(S rxlev,Cell selection RX level value，单位dB)，或小区选择质量值(S qual,Cell selection quality value,单位dB),或小区重选使用的RSRP测量量Q meas，或小区 排序准则中服务小区的Rs，或小区排序准则中邻小区的Rn等，本申请实施例对此不作限制。3)本申请实施例中“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指的这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a,b,或c中的至少一项(个)，可以表示：a,b,c,a-b,a-c,b-c,或a-b-c，其中a,b,c可以是单个，也可以是多个。
以及，除非有相反的说明，本申请实施例提及“第一”、“第二”等序数词是用于对多个对象进行区分，不用于限定多个对象的大小、内容、顺序、时序、优先级或者重要程度等。例如，第一阈值和第二阈值，只是为了区分不同的阈值，而并不是表示这两个阈值的大小、优先级或者重要程度等的不同。
前文介绍了本申请实施例所涉及到的一些名词概念，下面介绍本申请实施例涉及的技术特征。
随着通信发展，引入了MBS技术，MBS服务是面向多个终端设备的业务，例如直播业务、公共安全业务、批量软件更新业务等。
目前，处于空闲态或非激活态的终端设备可以测量服务小区和邻区的信号质量，如果服务小区的信号质量较差，而邻区的信号质量较好，则终端设备可以主动重新选择优先级更高或信号质量更好的小区作为服务小区，这个过程称为小区重选。由于目前小区重选过程是针对单播业务进行的，而引入MBS服务之后，若继续沿用现有的小区重选过程则会影响MBS服务的连续性。
例如，MBS服务采用两步配置的方式进行配置：接入网设备广播MBS专用***消息(如MBS SIB)，该MBS专用***消息中携带MCCH的配置信息。然后在配置的传输窗口中在MCCH上传输MBS配置信息。对MBS服务感兴趣的终端设备在进入提供上述MBS专用***消息的小区时，以及收到MCCH变更通知时，会获取MCCH上的MBS配置信息。由于MBS配置信息是小区级的配置信息，可以包括小区提供的MBS会话的ID、MBS会话的配置和调度信息等，所以每个小区的MCCH携带的MBS配置信息可能不同，当空闲态或非激活态的终端设备进行小区重选时，需要在接入重选小区后读取重选小区的MBS专用***消息获取到MCCH的配置信息，再去读取MCCH获得该重选小区的MBS配置信息的配置信息。该方式导致时延较大，造成MBS服务中断，影响MBS服务的连续性。
又例如，在LTE中，终端设备采用以下机制来感知提供MBS服务的频点/区域：终端设备的应用层/服务层提供MBS服务的用户业务描述(user service description，USD)，其中，USD包括MBS会话ID如临时移动组标识(temporary mobile group identity，TMGI)、会话起始时间和结束时间、MBS会话的频点、MBS服务区域标识(service area identity，SAI)，其中每个服务区域由一组小区组成。或者，终端设备采用以下机制来感知提供MBS服务的频点/区域：服务小区广播***消息(如SIB15)，在该***消息中提供当前频点和每个相邻频点的MBS SAI。
在LTE中，当终端设备想要接收某个MBS并且只能驻留在该频点上收这个MBS服务时，则在小区重选时将该频点视为最高优先级。将某频点视为最高优先级时需要满足以下 两个条件：
条件一：如果服务小区未广播***消息(如SIB15)，但该频点是此MBS服务的USD中提供的频点；如果服务小区广播了***消息(如SIB15)，则该***消息中广播的该频点的SAI中包括此MBS服务的USD中对该频点指示的SAI。
条件二：终端设备支持单小区点到多点传输(single-cell point-to-multipoint，SC-PTM)接收，并且该频点上的候选小区正在广播MBS专用***消息。
但是，由于NR中没有SAI的概念，当某个MBS服务仅部署在某频点的部分小区上时，如果终端设备仍按照LTE中的在小区重选频点优先原则将该频点视为高优先级，则会导致终端设备重选到不支持MBS服务的小区上，从而导致MBS服务中断，或导致终端设备接收MBS服务的时延增加。
再例如，在LTE中，***消息(system message，SI)定期广播给终端设备。NR网络中的SI分为最小SI和其他SI，其中，最小SI包括主信息块(master information block，MIB)和***消息块1(system information block 1，SIB1)，其他SI包含了多个未在最小SI中广播的SIBs(例如除了SIB1之外的其他SIB)。SIB1中携带SI message的调度信息。每个SI message中可以携带一个或多个SIB。
对于其他SI，终端设备可以主动请求广播，即按需(on-demand)请求SI，例如，终端设备可以向接入网设备发送SI请求消息以请求包含所需SI的SI message。携带MCCH配置信息的MBS SIB属于其他SI，如果接入网设备支持on-demand请求SI，终端设备可以采用on-demand的方式请求上述MBS SIB。但如果MBS SIB和其他SIB在一个SI message中，由于终端设备只能请求该SI Message，接入网设备在收到请求后，不知道该请求是针对该SI message中MBS SIB还是其他SIB。当接入网设备未广播MCCH时，比如接入网设备选择采用On-demand MCCH的方式发送MCCH，当终端设备请求SI message时，如果接入网设备仅广播该SI message上的SIB而不广播MCCH，则终端设备无法获得MBS配置信息，从而导致MBS服务中断或接收MBS服务的时延增加。但是如果接入网设备在每次收到包含MBS专用***消息的SI message的请求消息时都开始广播MCCH，则可能会带来不必要的信令开销和资源开销。
基于此，本申请实施例提供一种通信方法及装置，用于提升MBS服务的连续性。其中，方法和装置是基于同一发明构思的，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
本申请提供的通信方法可以应用于各类通信***中，例如，可以是物联网(internet of things，IoT)、窄带物联网(narrow band internet of things，NB-IoT)、LTE，也可以是第五代(5th generation,5G)通信***，还可以是LTE与5G混合架构，也可以是6G或者未来通信发展中出现的新的通信***等。本申请所述的5G通信***可以包括非独立组网(non-standalone，NSA)的5G通信***、独立组网(standalone，SA)的5G通信***中的至少一种。通信***还可以是机器到机器(machine to machine，M2M)网络、机器类通信(machine type communication，MTC)或者其他网络。
如图2所示，本申请实施例提供的通信方法可应用于通信***，该通信***包括接入网设备和六个终端设备，即用户设备(user equipment，UE)1～UE6。在该通信***中，UE1～UE6可以发送上行信息给接入网设备，接入网设备可以接收UE1～UE6发送的上行数据。此外，UE4～UE6也可以组成一个子通信***。接入网设备可以发送下行信息给UE1、 UE2、UE3、UE5，UE5可以基于设备到设备(device-to-device，D2D)技术发送下行信息给UE4、UE6，或者UE4～UE6之间可以基于设备到设备(device-to-device，D2D)技术相互之间进行通信。
本申请实施例也可用于其他通信***，只要该通信***中需要进行多播传输。另外申请实施例不仅适用于一个接入网设备和多个UE通信的场景，而且适用于多个接入网设备协作同时与一个或多个UE进行通信的场景(例如单频网络(single frequency network，SFN)。图2仅是一种示意图，并不对通信***的类型，以及通信***内包括的设备的数量、类型等进行具体限定。
以上所示终端设备可以是UE、终端(terminal)、接入终端、终端单元、终端站、移动台(mobile station，MS)、远方站、远程终端、移动终端(mobile terminal)、无线通信设备、终端代理、终端设备、蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal digital assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、未来5G网络中的终端装置或者未来演进的PLMN网络中的终端装置等。该终端设备可具备无线收发功能，其能够与一个或多个通信***的一个或多个接入网设备进行通信(如无线通信)，并接受接入网设备提供的网络服务，这里的接入网设备包括但不限于图2所示接入网设备。
另外，终端设备可以部署在陆地上，包括室内或室外、手持或车载；终端设备也可以部署在水面上(如轮船等)；终端设备还可以部署在空中(例如飞机、气球和卫星上等)。该终端设备具体可以是手机(mobile phone)、平板电脑(pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端、增强现实(augmented reality，AR)终端、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程医疗(remote medical)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。终端设备也可以是具有通信模块的通信芯片，也可以是具有通信功能的车辆，或者车载设备(如车载通信装置，车载通信芯片)等。
接入网设备(或称接入网站点是指有提供网络接入功能的设备，如无线接入网(radio access network，RAN)基站(或称RAN设备)等等。接入网设备具体可包括基站(base station，BS)，或包括基站以及用于控制基站的无线资源管理设备等。该接入网设备还可包括中继站(中继设备)、接入点以及未来5G网络中的基站、未来演进的PLMN网络中的基站或者NR基站等。接入网设备可以是可穿戴设备或车载设备。接入网设备也可以是具有通信模块的通信芯片。
比如，接入网设备包括但不限于：5G中的下一代基站(g nodeB，gNB)、LTE***中的演进型节点B(evolved node B，eNB)、无线网络控制器(radio network controller，RNC)、云无线接入网络(cloud radio access network，CRAN)***下的无线控制器、基站控制器(base station controller，BSC)、家庭基站(例如，home evolved nodeB，或home node B，HNB)、基带单元(baseBand unit，BBU)、传输点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、移动交换中心，还可以是LTE中的演进型(evolutional)NB(eNB或eNodeB)，还可以是5G网络中的基站设备或者未来演进的PLMN网络中的接入网设备，还可以是可穿戴设备或车载设备。
在一些部署中，接入网设备可以包括集中式单元(centralized unit，CU)和分布单元(distributed unit，DU)。接入网设备还可以包括有源天线单元(active antenna unit，AAU)。CU实现接入网设备的部分功能，DU实现接入网设备的部分功能，比如，CU负责处理非实时协议和服务，实现RRC，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理物理层协议和实时服务，实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理层(physical layer，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU+AAU发送的。可以理解的是，接入网设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，可以将CU划分为RAN中的接入网设备，也可以将CU划分为核心网(core network，CN)中的接入网设备(可称为CN设备)，本申请对此不做限定。
此外，接入网设备可连接至CN设备，核心网设备可用于为接入到接入网设备的终端设备提供核心网服务。核心网设备在不同的***下可对应不同的设备。比如在3G中核心网设备可以对应通用分组无线服务技术(general packet radio service，GPRS)的服务支持节点(serving GPRS support node，SGSN)和/或GPRS的网关支持节点(gateway GPRS Support Node，GGSN)。在4G中核心网设备可以对应移动管理实体(mobility management entity，MME)和/或服务网关(serving gateway，S-GW)等。在5G中核心网设备可以对应接入和移动性管理功能(access and mobility management function，AMF)实体、会话管理功能(session management function，SMF)实体或者用户面功能(user plane function，UPF)实体等。
下面结合附图，对接入网设备和终端设备可能的结构进行介绍。
示例性的，图3示出了装置的一种可能的结构示意图。图3所示装置可以是通信设备，也可以是应用于通信设备中的芯片或者其他具有本申请所示通信设备功能的组合器件、部件(或称组件)等，其中，通信设备可以是本申请实施例所示接入网设备，或者，也可以是本申请实施例所示终端设备。该装置可包括处理模块310和收发模块320。其中，收发模块320可以是一个功能模块，该功能模块既能完成发送操作也能完成接收操作，例如收发模块320可以用于执行由通信设备所执行的全部发送操作和接收操作，例如，在执行发送操作时，可以认为收发模块320是发送模块，而在执行接收操作时，可以认为收发模块320是接收模块；或者，收发模块320也可以是两个功能模块，收发模块320可以视为这两个功能模块的统称，这两个功能模块分别为发送模块和接收模块，发送模块用于完成发送操作，例如发送模块可以用于执行由通信设备所执行的全部发送操作，接收模块用于完成接收操作，接收模块可以用于执行由通信设备所执行的全部接收操作。
示例性的，当该装置是通信设备时，收发模块320可包括收发器和/或通信接口。收发器可以包括天线和射频电路等。通信接口例如光纤接口。处理模块310可以是处理器，例如基带处理器，基带处理器中可以包括一个或多个CPU。
当该装置是具有本申请所示通信设备功能的部件时，收发模块320可以是射频单元，处理模块310可以是处理器，例如基带处理器。
当该装置是芯片***时，收发模块320可以是芯片(例如基带芯片)的输入输出接口，处理模块310可以是芯片***的处理器，可以包括一个或多个中央处理单元。
应理解，本申请实施例中的处理模块310可以由处理器或处理器相关电路组件实现，收发模块320可以由收发器或收发器相关电路组件实现。
一种实现方式中，当通信设备为本申请实施例所示接入网设备时，处理模块310可以用于执行本申请实施例中由接入网设备所执行的除了收发操作之外的全部操作，例如处理操作，和/或用于支持本文所描述的技术的其它过程。收发模块320可以用于执行本申请实施例中由接入网设备所执行的全部接收和发送操作，和/或用于支持本文所描述的技术的其它过程。
另一种实现方式中，当通信设备为本申请实施例所示终端设备时，处理模块310可以用于执行本申请实施例中由终端设备所执行的除了收发操作之外的全部操作，例如处理操作，和/或用于支持本文所描述的技术的其它过程，比如确定所述服务小区的邻区中存在信号质量满足预设条件的小区等。收发模块320可以用于执行本申请实施例中由终端设备所执行的全部接收和发送操作，和/或用于支持本文所描述的技术的其它过程。
图4示出了终端设备的另一种可能的结构示意图。如图4所示，该通信设备包括处理器、存储器、射频单元(或射频电路)、天线以及输入输出装置等结构。处理器主要用于对通信协议以及通信数据进行处理，以及对装置进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频单元主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏、键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端设备可以不具有输入输出装置。
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图4中仅示出了一个存储器和处理器。在实际的终端设备产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端设备的收发单元(收发单元可以是一个功能单元，该功能单元能够实现发送功能和接收功能；或者，收发单元也可以包括两个功能单元，分别为能够实现接收功能的接收单元和能够实现发送功能的发送单元)，将具有处理功能的处理器视为终端设备的处理单元。如图4所示，终端设备包括收发单元410和处理单元420。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元410中用于实现接收功能的器件视为接收单元，将收发单元410中用于实现发送功能的器件视为发送单元，即收发单元410包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。
应理解，收发单元410可与收发模块320对应，或者说，收发模块320可由收发单元410实现。收发单元410用于执行本申请所示实施例中终端设备的发送操作和接收操作，和/或用于支持本文所描述的技术的其它过程。处理单元420可与处理模块310对应，或者 说，处理模块310可由处理单元420实现。处理单元420用于执行本申请所示实施例中终端设备上除了收发操作之外的其他操作，例如用于执行本申请所示实施例中由终端设备所执行的全部接收和发送操作，和/或用于支持本文所描述的技术的其它过程。
图5示出了接入网设备另一种可能的结构示意图。如图5所示，接入网设备包括处理器、存储器、射频单元(或射频电路)或者天线等结构。处理器主要用于对通信协议以及通信数据进行处理，以及对接入网设备进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频单元主要用于基带信号与射频信号的转换以及对射频信号的处理。
如图5所示，接入网设备可包括收发单元510和处理单元520，其中，该收发单元510可以包括发送单元和接收单元，或者，该收发单元510可以是一个能够实现发送和接收功能的单元。该收发单元510可以与图3中的收发模块320对应，即可由收发单元510执行由收发模块320执行的动作。可选地，该收发单元510还可以称为收发机、收发电路、或者收发器等等，其可以包括至少一个天线511和射频单元512。该收发单元510部分主要用于射频信号的收发以及射频信号与基带信号的转换。该处理单元520部分主要用于进行基带处理，对接入网设备进行控制等。该收发单元510与处理单元520可以是物理上设置在一起，也可以物理上分离设置的，即分布式接入网设备。
示例性的，收发单元510可包括一个或多个射频单元，如远端射频单元(remote radio unit,RRU)，处理单元520可包括一个或多个BBU(也可称为DU)。
在一个示例中，该处理单元520可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如LTE网络)，也可以分别支持不同接入制式的无线接入网(如LTE网络，5G网络或其他网络)。该处理单元520还包括存储器521和处理器522。该存储器521用以存储必要的指令和数据。该处理器522用于控制接入网设备进行必要的动作，例如用于控制接入网设备执行本申请所示实施例中关于接入网设备的操作流程。该存储器521和处理器522可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
本申请实施例描述的网络架构以及业务场景是为了更加清楚的说明本申请实施例的技术方案，并不构成对于本申请实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务场景的出现，本申请实施例提供的技术方案对于类似的技术问题同样适用。
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。为了便于介绍，在下文中，以该方法由接入网设备和终端设备执行为例。
本申请实施例中，MBS服务也可以称为“MBS业务”“MBS广播服务”“MBS会话”“MBS广播业务”“MBS”等等。
本申请实施例中，频率与“频点”可以相互替换。
参见图6，为本申请提供的一种通信方法的流程示意图。该方法包括：
S601，终端设备向服务小区对应的接入网设备发送第一信息。相应的，接入网设备接收第一信息。
其中，第一信息用于请求服务小区的邻区的MBS配置信息。
一种可能的实施方式中，终端设备可以在服务小区上向接入网设备发送第一信息。
在本申请实施例中，服务小区对应的接入网设备可以指实现该服务小区功能的接入网设备。或者，服务小区也可以是终端设备当前驻留(或接入)的小区。
邻区是指与服务小区相邻的小区，或者，是与当前服务频点相邻的频点的小区，其中，服务频点是终端设备当前驻留的小区所在的频点。
一种实现方式中，终端设备可以在满足触发条件时发送第一信息。例如，触发条件可以包括：服务小区的邻区中存在信号质量满足预设条件的小区。在举例中，终端设备可以在确定服务小区的邻区中存在信号质量满足预设条件的小区的情况下，发送第一信息。具体的，触发条件可以包括：服务小区的邻区中存在至少一个信号质量满足预设条件的小区。或者，触发条件可以包括：服务小区的邻区中存在N个信号质量满足预设条件的小区，即服务小区的邻区中信号质量满足预设条件的小区的数量大于或等于N，在举例中，终端设备可以在确定服务小区的邻区中存在N个信号质量满足预设条件的小区，即服务小区的邻区中信号质量满足预设条件的小区的数量大于或等于N的情况下，发送第一信息，N为大于1的整数。或者，触发条件可以包括：服务小区的邻区中信号质量满足预设条件的小区的比例大于或等于门限值，比如比例大于0.2，在举例中，终端设备还可以在确定服务小区的邻区中信号质量满足预设条件的小区的比例大于或等于门限值的情况下，发送第一信息。
作为一种示例，信号质量满足预设条件的小区可以但不限于包括如下至少一项：
在时间间隔T内信号质量大于或等于第一阈值的第一类小区，其中，第一类小区包括：比服务频点优先级高的异频频点的小区、比服务频点优先级高的异***频点的小区等；
在时间间隔T内信号质量大于或等于第二阈值的第二类小区，其中，第二类小区包括：与服务频点优先级相同的异频频点的小区、与服务频点优先级相同的异***频点的小区等；
在时间间隔T内信号质量大于服务小区的信号质量的第二类小区；
在时间间隔T内信号质量大于或等于第三阈值的第三类小区，其中，第三类小区可以包括：与服务频点相同频点的小区等；
在时间间隔T内信号质量大于服务小区的信号质量的第三类小区；
在时间间隔T内信号质量大于或等于第四阈值的第四类小区，其中，第四类小区可以包括：比服务频点优先级低的异频频点的小区、比服务频点优先级低的异***频点的小区等。
可选的，触发条件还可以包括：在时间间隔T内服务小区的信号质量小于或等于第五阈值。
需要说明的是，上述第一阈值、第二阈值、第三阈值、第四阈值、第五阈值可以相同也可以不同，这里不做具体限定。上述各阈值可以在协议中固定，或者通过接收来自接入网设备的信令来获得，其中，该信令可以是高层信令如RRC层信令，MAC层信令等，或者该信令可以是物理层信令，如下行控制信息(downlink control information,DCI)等，或者是高层信令和物理层信令的组合，本申请各实施例对此不作限制。
可以理解的，本申请实施例中，第一信息用于触发接入网设备发送服务小区的邻区的MBS配置信息，而接入网设备具体发送哪些邻区的MBS配置信息，可以是终端设备通过第一信息指示的，例如，第一信息可以携带至少一个邻区的标识。或者，接入网设备具体发送哪些邻区的MBS配置信息，也可以是接入网设备自己确定的。
可选的，在终端设备通过第一信息指示接入网设备发送哪些邻区的MBS配置信息的 实施方式中，第一信息可以携带服务小区的至少一个邻区的标识，具体的，可以携带至少一个信号质量满足预设条件的小区的标识。其中，该至少一个信号质量满足预设条件的小区的标识可以是信号质量满足预设条件的小区中所有小区的标识，也可以是信号质量满足预设条件的小区中部分小区的标识。
示例性的，小区的标识可以为物理小区标识(physical cell identity，PCI)等。
或者，第一信息中也可以不携带邻区的标识，这种方式中，接入网设备发送哪些邻区的MBS配置信息，可以由接入网设备确定。
可选的，第一信息中还可以携带终端设备请求的MBS会话标识信息，比如TMGI，和/或，MBS会话ID等。相应的，接入网设备在发送邻区的MBS配置信息时可以发送该MBS会话标识信息对应的MBS配置信息。
S602，接入网设备向终端设备发送第二信息。相应的，终端设备接收第二信息。
其中，第二信息包括服务小区的至少一个邻区的MBS配置信息。
MBS配置信息可以为3GPP协议中的MBS广播配置信息，或者，也可以为未来通信发展中MBS相关的配置信息，如MBS组播配置信息、MBS专用配置信息等。
作为一种示例，邻区的MBS配置信息可以包括如下至少一项：邻区正在进行的MBS会话标识(identification，ID)、组移动用户识别码(group radio network temporary identifier，G-RNTI)、广播MBS无线承载(MBS radio bearer，MRB)配置、MBS业务信道(MBS traffic channel，MTCH)调度信息等。
在一种可能的实施方式中，接入网设备可以通过X2接口或者操作管理维护(operations administration&maintenance，OAM)等方式获取邻区的MBS配置信息。
在一种可能的实施方式中，服务小区和邻区属于相同的接入网设备，或者，服务小区对应的DU与邻区对应的DU连接相同的CU，则服务小区对应的接入网设备可以获知邻区的MBS配置信息。
相比于终端设备在重选到服务小区的相邻小区(新小区)后读取该新小区的MBS专用***消息获取到MBS控制信道的配置信息，再去读取MBS控制信道获得该新小区的MBS配置信息的方式，本申请实施例中，终端设备可以在服务小区请求邻区的MBS配置信息，从而可以提前获得邻区的MBS配置信息，无需在重选到新小区后再获取小区MCCH，从而可以降低移动时获取新小区MBS配置信息的时延，提高MBS服务的连续性。
下面对于第一信息的发送方式进行说明。
一种可能的实施方式中，第一信息的发送时间可以早于小区重选完成，或者第一信息的发送时间在终端设备驻留在重选小区之前，例如，第一信息的发送时间可以早于终端设备接收重选小区的***信息块(如SIB1)的时间。
作为一种示例，终端设备处于空闲态或非激活态时，在满足上述触发条件时向服务小区对应的接入网设备发送第一信息。
一种举例说明中，第一信息可以通过随机接入消息3或随机接入消息5指示，例如，第一信息可以携带在随机接入消息3或随机接入消息5中。其中，随机接入消息3可以为RRC建立请求消息(RRCSetupRequest)，或RRC恢复请求消息(RRCResumeRequest)，或RRC重建请求消息(RRCReestablishmentRequest)等。随机接入消息5可以为RRC建立完成消息(RRCSetupComplete)或RRC恢复完成消息(RRCResumeComplete)消息，或RRC重建完成消息(RRCReestablishmentComplete)等。
另一种举例说明中，第一信息可以通过随机接入消息1指示，例如，终端设备可以通过使用专用前导码(preamble)或专用随机接入信道时机(RACH occasion，RO)指示第一信息。
下面对于第二信息的发送方式进行说明。
一种可能的实施方式中，第二信息可以承载于MCCH中，即终端设备可以在MCCH中接收第二信息。可选的，在该实施方式中，接入网设备在发送第二信息之前，可以向终端设备发送第三信息，其中，第三信息用于通知MCCH更改，例如，第三信息可以是MCCH更改通知。可选的，第三信息指示的MCCH更改通知是用于指示当前的MCCH内容发生更改。通过上述方式，使得终端设备可以及时接收第二信息，从而可以进一步提升MBS服务的连续性。
其中，第三信息通知MCCH更改时可以不指示发生更改的MCCH，或者，也可以指示发生更改的MCCH，这里不做具体限定。
一种可选的方案中，第三信息中还可以携带指示信息，该指示信息用于指示MCCH更改用于广播邻区的MBS配置信息。相应的，想要接收邻区的MBS配置信息的终端设备可以根据配置的MCCH重复周期在MCCH传输窗口内获取更新后的MCCH。
可选的，第三信息还可以指示本小区的MCCH内容未更改或本小区的MBS配置信息未更改。
通过上述方式，使得终端设备可以根据自己的需求决定是否接收MCCH以获取第二信息，如不想要接收邻区MCCH或邻区MBS配置信息的终端设备(例如，没有移动性需求的终端)可以不去重复检测和/或接收MCCH，该方式有助于降低终端设备的功耗。
另一种可能的实施方式中，第二信息也可以通过专用信令发送。例如，终端设备采用随机接入消息3发送第一信息之后，接入网设备可以通过随机接入消息4发送第二信息，随机接入消息4可以为RRC恢复消息(RRCResume消息)或者RRC建立(RRCSetup消息)或者RRC重建立(RRCReestablishment消息)等。又例如，终端设备采用随机接入消息5发送第一信息之后，接入网设备可以通过其他RRC消息发送第二信息。
本申请实施例中，终端设备可以在服务小区请求邻区的MBS配置信息，从而可以提前获得邻区的MBS配置信息，无需在重选到新小区后再获取小区MCCH，从而可以降低移动时获取新小区MBS配置信息的时延，提高MBS服务的连续性。
此外，接入网设备在收到终端设备的第一信息后，可以在MCCH更改通知中显式指示MCCH更改是用于提供邻区MBS配置信息，这样终端设备可以根据自身的移动性需求判断是否需要获取更新后的MCCH，从而可以避免让无移动性需求的终端设备重复接收MCCH，避免对终端设备带来额外的功耗。
参见图7，为本申请提供的另一种通信方法的流程示意图。该方法包括：
S701，终端设备确定第一频率满足预设条件。
其中，预设条件包括第一频率上的候选小区中的部分或全部能够提供第一MBS服务；或，预设条件包括第一频率上的候选小区中能够提供第一MBS服务的候选小区的数量或比例大于门限值。
可以理解的，“第一频率上的候选小区中的部分候选小区提供第一MBS服务”可以理解为第一频率上存在提供第一MBS服务的候选小区。
可选的，终端设备可以通过如下方式确定第一频率上的候选小区能否提供第一MBS 服务：终端设备接收第二信息，第二信息携带能够提供第一MBS服务的小区列表。
例如，终端设备可以通过对邻区的同步信号和物理广播信道块(synchronization signal and PBCH block，SSB)进行测量，获取第一频率上的一个或多个候选小区的PCI。终端设备通过服务小区广播的MCCH中携带的邻区信息获取能够提供第一MBS服务的邻区PCI列表。
终端设备可以通过比较第一频率上候选小区的PCI与提供第一MBS服务的邻区PCI列表可以确定第一频率是否满足预设条件。
作为一种可选的方案，预设条件还可以包括如下条件：
条件一：如果服务小区未广播用于MBS服务连续性的***消息(如SIB15)，但所述第一频率是此MBS服务的USD中提供的频率；如果服务小区广播了用于MBS服务连续性的***消息(如SIB15)，则该***消息中广播的该频点的一个或多个标识中包括此MBS服务的USD中提供的标识，或***消息中广播的该频点的一个或多个ID与此MBS服务的USD中提供的标识相同，所述标识可以为MBS会话ID、或TMGI、或MBS会话组标识、或TMGI组标识、或服务区域标识、或小区组标识中的至少一项，或以上多项的组合。
条件二：所述第一频点上的候选小区的SIB1中包括第一SIB的调度信息；或者所述第一频点上的候选小区能够提供第一SIB，其中，第一SIB用于配置MCCH的SIB，如第一SIB为MBS SIB。
条件三：终端设备正在接收或感兴趣去接收第一MBS服务，并且只能驻留在第一频率上接收所述第一MBS服务。
S702，终端设备确定第一频率为小区重选评估时最高优先级的频率。
可选的，终端设备也可以将第一频率上能够提供第一MBS服务的小区在小区重选时作为高优先级的小区。当上述小区满足高优先级的小区重选准则时，比如小区信号质量满足高优先小区重选阈值时执行小区重选。可选的，对第一频率上不能够提供第一MBS服务的小区，终端设备不改变所述小区在小区重选时的优先级。
如果第一频率上仅有部分小区上提供第一MBS服务，终端设备在小区重选时可能会重选到不支持终端设备想要接收的MBS服务的小区上。本申请实施例中，在确定频率是否为最高优先级的频率时增加关于第一频率上的候选小区提供当前MBS服务的条件，可以一定程度上降低终端设备重选到不支持当前MBS服务的小区的概率，从而可以提高MBS第三信息连续性。
此外，若大量终端设备请求进入RRC连接态通过单播接收MBS服务，则会导致小区拥塞，而本申请实施例可以有效防止终端设备接入到不能提供终端设备想要接收的MBS服务的小区上，可以有效的避免上述情境下小区拥塞的发生。
一种实现方式中，终端设备可以在第一频率上提供第一MBS服务的方式为在第一频率的部分小区上提供第一MBS服务的情况下，执行图7所示的方法。
可选的，在该实现方式中，终端设备可以通过如下方式确定第一频率上提供第一MBS服务的方式：终端设备可以通过获取接入网设备广播的用于MBS服务业务连续性的***消息(例如SIB15)确定第一频率上提供第一MBS服务的方式，例如，接入网设备广播的用于MBS服务连续性的***消息中可以携带第一信息，第一信息指示第一频率上提供第一MBS服务的方式。
作为一种示例，接入网设备可以在服务小区的***信息中携带频率信息和频率对应的MBS信息，比如携带当前频率和相邻频率能够提供的MBS服务的信息，例如，携带当前频率和相邻频率能够提供的MBS服务ID和/或TMGI，或者MBS服务组ID。此外，针对MBS服务或MBS服务组，接入网设备还指示该MBS服务部署在该频率的全部小区上还是部分小区。可选的，所述在第一频率上提供第一MBS服务的方式用1bit信息指示。
一种实施方式中，接入网设备可以通过X2接口或OAM获取频率信息和频率对应的MBS信息。
或者，终端设备也可以通过如下方式确定第一频率上提供第一MBS服务的方式：终端设备可以在终端设备应用层或服务层提供的USD中获取第一信息，第一信息指示第一频率上提供第一MBS服务的方式。
作为一种示例，终端设备可以通过应用层或服务层提供的USD获得提供MBS服务的频率，同时在USD中还指示该MBS服务是在该频率的所有小区上部署，还是仅在频率上的部分小区部署。可选的，所述在第一频率上提供第一MBS服务的方式用1bit信息指示。
需要说明的是，本申请实施例中，在第一频率的部分小区上提供第一MBS服务表示在一个给定的地理区域内第一频率上存在不能提供第一MBS服务的小区，或者，该第一频率上只有位于特定区域的小区上能够提供第一MBS服务，特定区域的小区可以指部署了第一MBS服务的小区。“在第一频率的部分小区上提供第一MBS服务”也可以描述为“在第一频率上动态提供第一MBS服务”、“在第一频率上按照小区粒度(per cell)提供第一MBS服务”、“第一MBS服务在第一频率上按照小区部署”等等。
在第一频率的全部小区上提供第一MBS服务表示在一个给定的地理区域内第一频率上的小区均能提供第一MBS服务，可选的，所述地理区域可以为在跟踪区(tracking area，TA)范围内，或在RAN范围内，或在SIB有效区域内，本申请实施例不做限定。“在第一频率的全部小区上提供第一MBS服务”也可以描述为“在第一频率的小区上非动态(或静态)提供第一MBS服务”、“第一频率上按照频率粒度提供第一MBS服务”、“第一MBS服务在第一频率上按照频率部署”等等。
参见图8，为本申请提供的另一种通信方法的流程示意图。本申请实施例中，当终端设备对多个频点上的一个或多个MBS服务感兴趣时，本申请实施例通过设计一种频点优先级判断机制，使得终端设备可以在多个频点中确定一个最高优先级的频点优先驻留。该方法包括：
S801，终端设备确定在N个频点上接收MBS服务，其中，N为大于1的整数。
S802，终端设备根据N个频点分别提供的MBS服务确定小区重选评估时最高优先级的频点。
示例性的，最高优先级的频点可以满足如下条件中至少一项：能够提供的MBS服务的数量最多；能够提供的MBS服务的优先级最高；能够提供第一MBS服务，第一MBS服务为终端设备当前正在接收的MBS服务。
一种实现方式中，如果终端设备正在接收多个MBS服务或对多个MBS服务感兴趣，则可以选择能够提供的MBS服务数目最多的频点作为最高优先级的频点。例如，可以按照频点能够提供终端设备正在接收或感兴趣接收的MBS服务的数量对频点的优先级进行排序，频点上能够提供MBS服务的数量越多，则频点优先级越高。
另一种实现方式中，如果终端设备正在接收多个MBS服务或对多个MBS服务感兴趣， 则可以选择优先级最高的MBS服务所在的频点作为最高优先级的频点。例如，可以按照频点所提供MBS服务的优先级对频点的优先级进行排序，频点上能够提供MBS服务的优先级越高，则频点的优先级越高。作为一种示例，一种实现方式为，MBS服务的优先级在USD中提供，或者在用于MBS服务连续性的***消息(如SIB15)中提供。
另一种实现方式中，终端设备可以选择当前正在接收的MBS服务所在的频点作为最高优先级。比如，当终端设备在进行小区重选的过程中开始对新的MBS服务感兴趣，则优先保证当前正在接收的MBS服务的连续性，小区重选时优先驻留在能够提供当前正在进行的MBS服务的频点上。
可选的，在上述三种实现方式中，若多个频点的优先级相同，则终端设备可以选择其中任意一个频点作为最高优先级的频点，或者，根据预设规则选择一个频点作为最高优先级的频点，示例性的，预设规则可以为信号质量最好等等。
需要说明的是，上述三种实现方式可以独立使用，也可以将其中的任意两种结合使用或者三者结合使用，并且不限定多种方式结合使用的使用顺序。举例来说，第一种实现方式和第二种实现方式结合使用，终端设备可以先确定能够提供终端设备正在接收或感兴趣接收的MBS服务最多的频点作为高优先级频点，如果存在多个频点能够提供的MBS服务数量相同，选择其中MBS服务优先级最高对应的频点作为最高优先级；或者，终端设备先确定最高优先级的MBS服务所在的频点作为高优先级频点，若存在多个相同优先级的频点，选择其中能够提供终端设备正在接收或感兴趣接收的MBS服务最多的频点作为最高优先级。
通过本申请实施例能够保证终端设备在小区重选过程中，优先驻留到能够提供更多数目的MBS服务的频点上，从而可以保证更多MBS服务的连续性；或者，可以优先保证最高优先级的MBS服务的连续性；或者，能够优先保证当前正在进行的MBS服务的连续性。
参见图9，为本申请提供的一种通信方法的流程示意图。该方法包括：
S901，终端设备向接入网设备发送第一信息。相应的，接入网设备接收第一信息。
其中，第一信息包括用于请求第一SI消息的信息以及用于请求第一SIB的信息，其中，第一SIB携带在第一SI消息中，第一SIB用于配置MCCH，例如，第一SIB可以为携带MCCH配置信息的SIB，举例说明，第一SIB可以是MBS SIB，或者SIB15等。一种示例性说明中，第一信息可以为SI请求消息(RRCSystemInfoRequest)。可选的，所述“用于请求第一SIB的信息”也可以描述为“用于请求MCCH的信息”。
可以理解的，第一SI消息可以包括第一SIB(比如MBS SIB，SIB15等)和至少一个第二SIB(比如SIB2至SIB14)。
目前，如果第一SIB和其他SIB在同一个SI消息中，终端设备只能请求该SI消息，接入网设备在收到请求后，不知道该请求是针对该SI message中第一SIB还是其他SIB(比如第二SIB)。本申请实施例中，通过显式指示请求的是第一SIB，第一SIB是用于配置MCCH的MBS SIB，即在第一信息中包括用于请求第一SIB的信息，或在第一信息中包括用于请求MCCH的信息，使得接入网设备可以准确的确定终端设备发送第一信息的目的是用于请求第一SIB或用于请求MCCH，从而使接入网设备可以及时开始广播MCCH，终端设备能够及时获取接收广播业务所必需的配置信息并开始接收广播数据，从而可以降低MBS服务的接收时延，避免MBS服务中断，保证MBS服务连续性。此外，也可以避免当终端设备实际在请求第二SIB(即非MBS SIB)时接入网设备广播MCCH带来的不必要 的信令开销，节省了资源，尤其是节省控制面无线信道资源。
一种可能的实施方式中，如果服务小区在SIB1中包含第一SIB的调度信息，但服务小区未广播第一SIB和MCCH时，想要接收MBS服务的终端设备可以向接入网设备发送第一信息，例如通过随机接入消息3发送第一信息。
S902，接入网设备广播MCCH，其中，MCCH携带MBS配置信息。相应的，终端设备接收来自接入网设备的MCCH。
一种可能的实现方式中，接入网设备在接收到第一信息之后，还可以向终端设备发送第一SIB。
一种具体的实现方式中，接入网设备在发送MCCH之前，可以向终端设备发送第二信息，其中，第二信息用于通知MCCH更改，例如，第二信息可以是MCCH更改通知。通过上述方式，使得终端设备可以及时接收MCCH，从而可以进一步提升终端设备接收MBS服务的连续性。
下面介绍第一信息可能的形式：以第一SI消息包括第一SIB和N个第二SIB为例，N为大于0的整数，第一信息可以包括第一比特，其中，该第一比特与第一SIB对应，用于指示是否请求第一SIB，例如，如果第一比特的状态为0，则可以表示终端设备不请求第一SIB，如果第一比特的状态为1，则可以表示终端设备请求第一SIB。在本申请实施例中，第一信息中第一比特可以为1。或者，第一信息可以包括第一比特，其中该第一比特用于指示是否请求MCCH。例如，如果第一比特的状态为0，则可以表示终端设备不请求MCCH，如果第一比特的状态为1，则可以表示终端设备请求MCCH。在本申请实施例中，第一信息中第一比特可以为1。
作为一种示例，第一信息可以如下：
Figure PCTCN2022114612-appb-000001
其中，Requested-SI-List字段可以包括用于请求第一SI消息的信息，Spare字段可以包括用于请求第一SIB或MCCH的信息，即状态为1的第一比特。
可选的，第一信息还可以包括N个第二SIB分别对应的比特，分别指示是否请求对应的第二SIB。结合上述示例，该N个第二SIB分别对应的N个比特也可以包括在Spare字段。
本申请实施例中考虑到支持MBS服务的接入网设备由于资源负载、信令开销等情况而选择按需广播MCCH时，当驻留在小区中的终端设备想要接收MBS服务时，可以采用On-demand SI的机制请求接入网设备发送携带MCCH配置的第一SIB，使得接入网设备可以准确的确定终端设备发送第一信息的目的是用于请求第一SIB或请求MCCH，从而使接入网设备可以及时开始广播MCCH，终端设备能够及时获取接收广播业务所必需的配置信息并开始接收广播数据，从而可以降低接收MBS服务的时延，避免MBS服务中断，保证广播业务连续性。此外，也可以避免当终端设备发送的按需SI请求消息实际用于请求第二SIB时接入网设备广播MCCH带来的不必要的信令开销，节省了资源，尤其是节省控制面无线信道资源。
需要说明的是，上述图6～图9所述的方法可以分别作为一个方案实施，也可以任意两 个或三个或四个相结合作为一个方案实施。
本申请实施例提供一种通信装置。该通信装置可用于实现上述实施例所涉及的终端设备，该通信装置可包括图3和/或图4所示结构。
本申请实施例提供一种通信装置。该通信装置可用于实现上述实施例所涉及的接入网设备，该通信装置可包括图3和/或图5所示结构。
本申请实施例提供一种通信***。该通信***可以包括至少一个终端设备和至少一个接入网设备，其中，该通信***中的终端设备和接入网设备可执行上述方法实施例中任一所示的方法。
本申请实施例还提供一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，该计算机程序被计算机执行时，该计算机可以实现上述方法实施例中任一所示的实施例中与终端设备或网络设备相关的流程。
本申请实施例还提供一种计算机程序产品，该计算机程序产品用于存储计算机程序，该计算机程序被计算机执行时，该计算机可以实现上述方法实施例中任一所示的实施例中与终端设备或网络设备相关的流程。
本申请实施例还提供一种芯片或芯片***，该芯片可包括处理器，该处理器可用于调用存储器中的程序或指令，执行上述方法实施例中任一所示的实施例中与终端设备或第一接入网设备相关的流程。该芯片***可包括该芯片，还可存储器或收发器等其他组件。
本申请实施例还提供一种电路，该电路可与存储器耦合，可用于执行上述方法实施例中任一所示的实施例中与终端设备或网络设备相关的流程。该芯片***可包括该芯片，还可存储器或收发器等其他组件。
本领域内的技术人员应明白，本申请的实施例可提供为方法、***、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(***)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。

Claims (59)

  1. 一种通信方法，其特征在于，所述方法包括：
    向服务小区对应的接入网设备发送第一信息，其中，所述第一信息用于请求所述服务小区的邻区的组播广播服务MBS配置信息；
    接收来自所述接入网设备的第二信息，所述第二信息包括所述服务小区的至少一个邻区的MBS配置信息。
  2. 如权利要求1所述的方法，其特征在于，在向接入网设备发送第一信息之前，所述方法还包括：
    确定所述服务小区的邻区中存在信号质量满足预设条件的小区。
  3. 如权利要求2所述的方法，其特征在于，所述信号质量满足预设条件的小区包括如下至少一项：
    在时间间隔T内信号质量大于或等于第一阈值的第一类小区；
    在时间间隔T内信号质量大于或等于第二阈值的第二类小区；
    在时间间隔T内信号质量大于所述服务小区的信号质量的所述第二类小区；
    在时间间隔T内信号质量大于或等于第三阈值的第三类小区；
    在时间间隔T内信号质量大于所述服务小区的信号质量的所述第三类小区；
    在时间间隔T内信号质量大于或等于第四阈值的第四类小区；
    其中，所述第一类小区包括如下至少一种：比服务频点优先级高的异频频点的小区、比所述服务频点优先级高的异***频点的小区；
    所述第二类小区为与所述服务频点优先级相同的异频频点的小区；
    所述第三类小区为与所述服务频点相同频点的小区；
    所述第四类小区包括如下至少一种：比所述服务频点优先级低的异频频点的小区、比所述服务频点优先级低的异***频点的小区。
  4. 如权利要求2或3所述的方法，其特征在于，所述第一信息携带至少一个信号质量满足所述预设条件的小区的标识。
  5. 如权利要求1-4任一项所述的方法，其特征在于，所述第一信息携带在随机接入消息3或随机接入消息5中。
  6. 如权利要求1-5任一项所述的方法，其特征在于，在接收来自所述接入网设备的第二信息之前，所述方法还包括：
    接收来自所述接入网设备的第三信息，所述第三信息用于通知MBS控制信道MCCH更改；
    所述接收来自所述接入网设备的第二信息，包括：
    在MCCH中接收所述第二信息。
  7. 如权利要求6所述的方法，其特征在于，所述第三信息中携带指示信息，所述指示信息用于指示所述MCCH更改用于广播邻区的MBS配置信息。
  8. 一种通信方法，其特征在于，所述方法应用于终端设备的服务小区对应的接入网设备，所述方法包括：
    接收来自所述终端设备的第一信息，其中，所述第一信息用于请求所述服务小区的邻区的组播广播服务MBS配置信息；
    向所述终端设备发送第二信息，所述第二信息包括所述服务小区的至少一个邻区的MBS配置信息。
  9. 如权利要求8所述的方法，其特征在于，所述第一信息携带至少一个小区的标识。
  10. 如权利要求8或9所述的方法，其特征在于，所述第一信息携带在随机接入消息3或随机接入消息5中。
  11. 如权利要求8-10任一项所述的方法，其特征在于，在向所述终端设备发送第二信息之前，所述方法还包括：
    向所述终端设备发送第三信息，所述第三信息用于通知MBS控制信道MCCH更改；
    所述向所述终端设备发送第二信息，包括：
    在MCCH中发送所述第二信息。
  12. 如权利要求11所述的方法，其特征在于，所述第三信息中携带指示信息，所述指示信息用于指示所述MCCH更改用于广播邻区的MBS广播配置信息。
  13. 一种通信方法，其特征在于，所述方法包括：
    确定满足第一频率满足预设条件，其中，所述预设条件包括所述第一频率上的候选重选小区中的部分或全部能够提供第一组播广播服务MBS；或，所述预设条件包括所述第一频率上的候选重选小区中能够提供所述第一MBS的候选重选小区的数量或比例大于门限值；
    确定所述第一频率为小区重选评估时最高优先级的频率。
  14. 如权利要求13所述的方法，其特征在于，在确定满足第一频率满足预设条件之前，所述方法还包括：
    获取第一信息，所述第一信息用于指示所述第一频率上提供所述第一MBS的方式为在所述第一频率的部分小区上提供所述第一MBS。
  15. 如权利要求14所述的方法，其特征在于，所述第一信息承载在接入网设备广播的***消息中，或者，所述第一信息包括在终端设备应用层或服务层提供的用户服务描述USD中。
  16. 如权利要求13-15任一项所述的方法，其特征在于，所述方法还包括：
    接收第二信息，所述第二信息携带能够提供所述第一MBS的小区列表。
  17. 一种通信方法，其特征在于，所述方法包括：
    确定在N个频点上接收组播广播服务MBS，其中，所述N为大于1的整数；
    根据所述N个频点分别提供的MBS确定小区重选评估时最高优先级的频点。
  18. 如权利要求17所述的方法，其特征在于，所述最高优先级的频点满足如下条件中至少一项：
    能够提供的MBS的数量最多；
    能够提供的MBS的优先级最高；
    能够提供第一MBS，所述第一MBS为终端设备当前正在接收的MBS。
  19. 一种通信方法，其特征在于，所述方法包括：
    向接入网设备发送第一信息，所述第一信息包括用于请求第一***信息SI消息的信息以及用于请求第一***信息块SIB的信息，其中，所述第一SIB携带在所述第一SI消息中，所述第一SIB用于配置组播广播服务MBS控制信道MCCH；
    接收来自所述接入网设备的所述第一SIB。
  20. 如权利要求19所述的方法，其特征在于，在向接入网设备发送第一信息之后，所述方法还包括：
    接收来自所述接入网设备的第二信息，其中，所述第二信息携带MBS配置信息。
  21. 如权利要求20所述的方法，其特征在于，在向接入网设备发送第一信息之后，所述方法还包括：
    接收来自所述接入网设备的第三信息，所述第三信息用于指示MCCH更改；
    所述接收来自所述接入网设备的第二信息，包括：
    在MCCH中接收所述第二信息。
  22. 一种通信方法，其特征在于，所述方法包括：
    接收来自终端设备的第一信息，所述第一信息包括用于请求第一***信息SI消息的信息以及用于请求第一***信息块SIB的信息，其中，所述第一SIB携带在所述第一SI消息中，所述第一SIB用于配置组播广播服务MBS控制信道MCCH；
    向所述终端设备发送所述第一SIB。
  23. 如权利要求22所述的方法，其特征在于，在接收来自终端设备的第一信息之后，所述方法还包括：
    向所述终端设备发送第二信息，其中，所述第二信息携带MBS广播配置信息。
  24. 如权利要求23所述的方法，其特征在于，在接收来自终端设备的第一信息之后，所述方法还包括：
    向所述终端设备发送第三信息，所述第三信息用于指示MCCH更改；
    所述向所述终端设备发送第二信息，包括：
    在MCCH中发送所述第二信息。
  25. 一种通信装置，其特征在于，所述装置包括：
    收发模块，用于与服务小区对应的接入网设备进行通信；
    处理模块，用于通过所述收发模块向所述接入网设备发送第一信息，其中，所述第一信息用于请求所述服务小区的邻区的组播广播服务MBS配置信息；以及
    通过所述收发模块接收来自所述接入网设备的第二信息，所述第二信息包括所述服务小区的至少一个邻区的MBS配置信息。
  26. 如权利要求25所述的装置，其特征在于，所述处理模块，还用于：
    在通过所述收发模块向所述接入网设备发送第一信息之前，确定所述服务小区的邻区中存在信号质量满足预设条件的小区。
  27. 如权利要求26所述的装置，其特征在于，所述信号质量满足预设条件的小区包括如下至少一项：
    在时间间隔T内信号质量大于或等于第一阈值的第一类小区；
    在时间间隔T内信号质量大于或等于第二阈值的第二类小区；
    在时间间隔T内信号质量大于所述服务小区的信号质量的所述第二类小区；
    在时间间隔T内信号质量大于或等于第三阈值的第三类小区；
    在时间间隔T内信号质量大于所述服务小区的信号质量的所述第三类小区；
    在时间间隔T内信号质量大于或等于第四阈值的第四类小区；
    其中，所述第一类小区包括如下至少一种：比服务频点优先级高的异频频点的小区、 比所述服务频点优先级高的异***频点的小区；
    所述第二类小区为与所述服务频点优先级相同的异频频点的小区；
    所述第三类小区为与所述服务频点相同频点的小区；
    所述第四类小区包括如下至少一种：比所述服务频点优先级低的异频频点的小区、比所述服务频点优先级低的异***频点的小区。
  28. 如权利要求26或27所述的装置，其特征在于，所述第一信息携带至少一个信号质量满足所述预设条件的小区的标识。
  29. 如权利要求25-28任一项所述的装置，其特征在于，所述第一信息携带在随机接入消息3或随机接入消息5中。
  30. 如权利要求25-29任一项所述的装置，其特征在于，所述处理模块，还用于：
    在通过所述收发模块接收来自所述接入网设备的第二信息之前，通过所述收发模块接收来自所述接入网设备的第三信息，所述第三信息用于通知MBS控制信道MCCH更改；
    所述处理模块，具体用于：
    在MCCH中通过所述收发模块接收所述第二信息。
  31. 如权利要求30所述的装置，其特征在于，所述第三信息中携带指示信息，所述指示信息用于指示所述MCCH更改用于广播邻区的MBS配置信息。
  32. 一种通信装置，其特征在于，所述装置应用于终端设备的服务小区对应的接入网设备，所述装置包括：
    收发模块，用于与所述终端设备进行通信；
    处理模块，用于通过所述收发模块接收来自所述终端设备的第一信息，其中，所述第一信息用于请求所述服务小区的邻区的组播广播服务MBS配置信息；以及
    通过所述收发模块向所述终端设备发送第二信息，所述第二信息包括所述服务小区的至少一个邻区的MBS配置信息。
  33. 如权利要求32所述的装置，其特征在于，所述第一信息携带至少一个小区的标识。
  34. 如权利要求32或33所述的装置，其特征在于，所述第一信息携带在随机接入消息3或随机接入消息5中。
  35. 如权利要求32-34任一项所述的装置，其特征在于，所述处理模块，还用于：
    在通过所述收发模块向所述终端设备发送第二信息之前，通过所述收发模块向所述终端设备发送第三信息，所述第三信息用于通知MBS控制信道MCCH更改；
    所述处理模块，具体用于：
    在MCCH中通过所述收发模块发送所述第二信息。
  36. 如权利要求35所述的装置，其特征在于，所述第三信息中携带指示信息，所述指示信息用于指示所述MCCH更改用于广播邻区的MBS广播配置信息。
  37. 一种通信装置，其特征在于，所述装置包括：
    处理模块，用于确定满足第一频率满足预设条件，其中，所述预设条件包括所述第一频率上的候选重选小区中的部分或全部能够提供第一组播广播服务MBS；或，所述预设条件包括所述第一频率上的候选重选小区中能够提供所述第一MBS的候选重选小区的数量或比例大于门限值；
    以及，确定所述第一频率为小区重选评估时最高优先级的频率。
  38. 如权利要求37所述的装置，其特征在于，所述处理模块，还用于：
    在确定满足第一频率满足预设条件之前，获取第一信息，所述第一信息用于指示所述第一频率上提供所述第一MBS的方式为在所述第一频率的部分小区上提供所述第一MBS。
  39. 如权利要求38所述的装置，其特征在于，所述第一信息承载在接入网设备广播的***消息中，或者，所述第一信息包括在终端设备应用层或服务层提供的用户服务描述USD中。
  40. 如权利要求37-39任一项所述的装置，其特征在于，所述装置还包括收发模块；
    所述收发模块，用于接收第二信息，所述第二信息携带能够提供所述第一MBS的小区列表。
  41. 一种通信装置，其特征在于，所述装置包括：
    处理模块，用于确定在N个频点上接收组播广播服务MBS，其中，所述N为大于1的整数；
    以及，根据所述N个频点分别提供的MBS确定小区重选评估时最高优先级的频点。
  42. 如权利要求41所述的装置，其特征在于，所述最高优先级的频点满足如下条件中至少一项：
    能够提供的MBS的数量最多；
    能够提供的MBS的优先级最高；
    能够提供第一MBS，所述第一MBS为终端设备当前正在接收的MBS。
  43. 一种通信装置，其特征在于，所述装置包括：
    收发模块，用于与接入网设备进行通信；
    处理模块，用于通过所述收发模块向接入网设备发送第一信息，所述第一信息包括用于请求第一***信息SI消息的信息以及用于请求第一***信息块SIB的信息，其中，所述第一SIB携带在所述第一SI消息中，所述第一SIB用于配置组播广播服务MBS控制信道MCCH；
    以及，通过所述收发模块接收来自所述接入网设备的所述第一SIB。
  44. 如权利要求43所述的装置，其特征在于，所述处理模块，还用于：
    在通过所述收发模块向接入网设备发送第一信息之后，通过所述收发模块接收来自所述接入网设备的第二信息，其中，所述第二信息携带MBS配置信息。
  45. 如权利要求44所述的装置，其特征在于，所述处理模块，还用于：
    在通过所述收发模块向接入网设备发送第一信息之后，通过所述收发模块接收来自所述接入网设备的第三信息，所述第三信息用于指示MCCH更改；
    所述处理模块，在通过所述收发模块接收来自所述接入网设备的第二信息时，具体用于：
    在MCCH中通过所述收发模块接收所述第二信息。
  46. 一种通信装置，其特征在于，所述装置包括：
    收发模块，用于与终端设备进行通信；
    处理模块，用于通过所述收发模块接收来自所述终端设备的第一信息，所述第一信息包括用于请求第一***信息SI消息的信息以及用于请求第一***信息块SIB的信息，其中，所述第一SIB携带在所述第一SI消息中，所述第一SIB用于配置组播广播服务MBS控制信道MCCH；
    以及，通过所述收发模块向所述终端设备发送所述第一SIB。
  47. 如权利要求46所述的装置，其特征在于，所述处理模块，还用于：
    在通过所述收发模块接收来自终端设备的第一信息之后，通过所述收发模块向所述终端设备发送第二信息，其中，所述第二信息携带MBS广播配置信息。
  48. 如权利要求47所述的装置，其特征在于，所述处理模块，还用于：
    在通过所述收发模块接收来自终端设备的第一信息之后，通过所述收发模块向所述终端设备发送第三信息，所述第三信息用于指示MCCH更改；
    所述处理模块，在通过所述收发模块向所述终端设备发送第二信息时，具体用于：
    在MCCH中通过所述收发模块发送所述第二信息。
  49. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器，用于存储指令；
    所述处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求1-7中任一项所述的方法。
  50. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器，用于存储指令；
    所述处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求8-12中任一项所述的方法。
  51. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器，用于存储指令；
    所述处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求13-16中任一项所述的方法。
  52. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器，用于存储指令；
    所述处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求17-18中任一项所述的方法。
  53. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器，用于存储指令；
    所述处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求19-21中任一项所述的方法。
  54. 一种通信装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器，用于存储指令；
    所述处理器，用于从所述存储器中调用并运行所述指令，使得所述通信装置执行如权利要求22-24中任一项所述的方法。
  55. 一种通信***，其特征在于，包括如权利要求25-31中任一所述的通信装置和32-36中任一所述的通信装置。
  56. 一种通信***，其特征在于，包括如权利要求41-42中任一所述的通信装置和43-45中任一所述的通信装置。
  57. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有指令，当所述指令在计算机上被调用执行时，使得所述计算机执行如权利要求1-24中任一项所述的方法。
  58. 一种计算机程序产品，其特征在于，包括指令，当所述指令在计算机上运行时，使 得所述计算机执行如权利要求1-24中任一项所述的方法。
  59. 一种电路，其特征在于，所述电路与存储器耦合，所述电路用于读取并执行所述存储器中存储的指令以执行如权利要求1-24中任一项所述的方法。
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