WO2024022014A1 - 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
WO2024022014A1
WO2024022014A1 PCT/CN2023/104264 CN2023104264W WO2024022014A1 WO 2024022014 A1 WO2024022014 A1 WO 2024022014A1 CN 2023104264 W CN2023104264 W CN 2023104264W WO 2024022014 A1 WO2024022014 A1 WO 2024022014A1
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WO
WIPO (PCT)
Prior art keywords
rrc
connected state
cell
terminal device
information
Prior art date
Application number
PCT/CN2023/104264
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English (en)
French (fr)
Inventor
沙桐
李秉肇
常俊仁
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication of WO2024022014A1 publication Critical patent/WO2024022014A1/zh

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Classifications

    • 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
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/40—Connection management for selective distribution or broadcast

Definitions

  • the embodiments of the present application relate to the field of communication technology, and in particular, to a communication method and device.
  • Rel-18 proposes to support terminal equipment to receive MBS multicast services in the RRC non-connected state, but requires the terminal equipment to enter the RRC non-connected state from the RRC connected state.
  • the terminal equipment When the terminal equipment enters the RRC non-connected state from the RRC connected state, it needs to perform cell selection. When the terminal equipment selects another cell that meets the cell residency criteria, it needs to re-obtain the multicast service configuration information of the cell and then use the group configuration information of the cell. Broadcast service configuration to receive multicast service. However, reacquiring the multicast service configuration of the cell and then receiving the multicast service will cause the multicast service to be interrupted, thus affecting the continuity of the multicast service.
  • the embodiments of the present application disclose a communication method and device for improving the continuity of multicast services.
  • this application discloses a communication method, which can be applied to terminal equipment, to modules (for example, chips) in the terminal equipment, and to devices that can realize all or part of the functions of the terminal equipment.
  • Logic modules or software The following description takes application to terminal equipment as an example.
  • the communication method may include: receiving first information from the network device in the RRC connected state, the first information instructing the terminal device to receive the multicast service in the RRC non-connected state; entering the RRC non-connected state; and passing the first cell in the RRC non-connected state.
  • the first cell is the serving cell where the terminal device is in the RRC connected state.
  • the terminal device after the terminal device receives the first information from the network device instructing the terminal device to receive the multicast service in the RRC non-connected state, and after the terminal device enters the RRC non-connected state from the RRC connected state, the terminal device enters the RRC non-connected state.
  • the connected state By receiving multicast services in the serving cell in the RRC connected state, the connected state can avoid the interruption of multicast services caused by the change of serving cells due to changes in the RRC state, thus improving the continuity of multicast services.
  • the terminal equipment enters the RRC non-connected state from the RRC connected state without performing cell selection.
  • the terminal equipment enters the RRC non-connected state from the RRC connected state without performing cell selection, which can avoid the terminal equipment from performing the cell selection process and can reduce the processing process of the terminal equipment, thereby reducing the power consumption of the terminal equipment.
  • the terminal device not performing cell selection may include: when the first cell satisfies the camping condition, the camped cell of the terminal device is the first cell.
  • the terminal device when the first cell meets the camping conditions, the terminal device is camped in the first cell, which can ensure that the terminal device is camped in the first cell with better signal quality to receive multicast services, and satisfies
  • the service quality requirements of multicast services can prevent terminal equipment from selecting other cells when the serving cell coverage is good, resulting in the interruption of multicast services; it can also avoid unnecessary cell selection processes, thereby reducing the power consumption of terminal equipment .
  • the first information is carried in the RRC release message
  • the terminal device entering the RRC non-connected state may include: entering the RRC non-connected state according to the RRC release message.
  • the first information is carried in the RRC release message for transmission, which can avoid transmitting the first information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thus saving transmission resources. At the same time Compatibility with existing protocols can be improved.
  • the first information is carried in the RRC release message.
  • the network device indicates through the RRC release message
  • the purpose of the terminal device entering the RRC non-connected state and instructing the terminal device to enter the RRC non-connected state is to receive multicast services in the RRC non-connected state. Therefore, the reception efficiency of multicast services can be improved and it is more compatible with existing protocols.
  • the first information may indicate the identity of the multicast service, or the identity of the MBS radio bearer (MBS radio bearer, MRB), which is the MRB associated with the multicast service.
  • MBS radio bearer MRB
  • the terminal device can receive a specific multicast service or certain multicast services through the first information indicating the identifier of the above-mentioned multicast service or the identifier of the MRB associated with the above-mentioned multicast service, which can prevent the terminal device from receiving all groups.
  • Multicast services can reduce the number of multicast services received by terminal devices, thereby reducing the power consumption of terminal devices.
  • the communication method may also include: receiving first configuration information from the network device, the first configuration information is used to configure the terminal device to receive the multicast service in the RRC non-connected state; the terminal device in the RRC non-connected state Receiving the multicast service through the first cell in the RRC non-connected state may include: receiving the multicast service through the first cell in the RRC non-connected state according to the first configuration information.
  • the terminal device can receive the multicast configuration of the RRC non-connected state from the network device through the first cell in the RRC connected state, and receive the multicast service through the first cell after entering the RRC non-connected state. No need Reacquiring the multicast configuration can improve the reception efficiency of multicast services. In particular, when the terminal device has received the multicast service in the RRC connection state, the terminal device can avoid the interruption of the multicast service due to reacquisition of the multicast configuration, thereby improving the continuity of the multicast service.
  • the first configuration information is also used to configure the terminal device to receive the multicast service in the RRC connected state.
  • a configuration information can be used not only for the terminal equipment to receive multicast services in the RRC non-connected state, but also for the terminal equipment to receive multicast services in the RRC connected state, which can avoid the need for RRC non-connected state and RRC connected state.
  • Configuration information is configured separately in each state, thereby improving the utilization of configuration information.
  • the number of times of transmitting configuration information can be reduced, and the number of times of information transmission can be reduced, thereby saving transmission resources.
  • the first configuration information is carried in the RRC reconfiguration message.
  • the first configuration information is carried in the RRC reconfiguration message for transmission, which can avoid transmitting the first configuration information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thereby saving transmission. resources while improving compatibility with existing protocols.
  • the communication method may further include: sending second information to the network device, where the second information is used to indicate support for receiving multicast services in the RRC non-connected state.
  • the terminal device when the terminal device supports receiving multicast services in the RRC non-connected state, the terminal device can report the capabilities of the terminal device to the network device, so that the network device can send the third message to the terminal device based on the capabilities reported by the terminal device.
  • One piece of information can avoid the situation where the terminal equipment does not support RRC non-connection state reception of multicast services and the network equipment sends the first information to the terminal equipment.
  • the communication method may also include: obtaining system information from the network device, where the system information is system information required for the RRC non-connected state.
  • the terminal device obtains system information after entering the RRC non-connected state, which can avoid the situation that the terminal device cannot correctly perform cell reselection due to missing system messages for the RRC non-connected state.
  • the RRC non-connected state may include an RRC idle state and/or an RRC inactive state.
  • the communication method may further include: receiving third information from the network device, the third information being used to indicate not to perform cell selection from the RRC connected state to the RRC non-connected state.
  • the terminal device after the terminal device receives the third information from the network device indicating that it enters the RRC non-connected state from the RRC connected state and does not perform cell selection, it does not perform cell selection after entering the RRC non-connected state, which can avoid the terminal device from performing cell selection.
  • Cell selection and subsequent processes can reduce the power consumption of terminal equipment and improve the continuity of multicast services.
  • the third information is carried in an RRC release message or an RRC reconfiguration message.
  • the third information is carried in the RRC release message or the RRC reconfiguration message for transmission, which can avoid transmitting the third information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thereby enabling Save transmission resources and improve compatibility with existing protocols.
  • the communication method may further include: receiving fourth information from the network device, the fourth information being used to indicate frequency priority; when performing cell selection, in order from high to low frequency priority Select the residential area.
  • the terminal device may select the resident cell in order from high to low frequency priority.
  • the terminal device can preferentially select the first cell, which can avoid multicast service interruption and reduce the power consumption of the terminal device.
  • the fourth information is carried in a system message or an RRC release message.
  • the fourth information is carried in a system message or an RRC release message for transmission, which can avoid sending a special message or Signaling transmits the fourth information, which can reduce the number of transmitted messages or signaling, thereby saving transmission resources and improving compatibility with existing protocols.
  • the present application discloses a communication method, which can be applied to network equipment, can also be applied to modules (for example, chips) in network equipment, and can also be applied to devices that can realize all or part of the functions of network equipment.
  • Logic modules or software The following description takes application to network equipment as an example.
  • the communication method may include: sending first information to the terminal device in the RRC connected state, the first information instructs the terminal device to receive the multicast service in the RRC non-connected state, and the first information is used for the terminal device to pass the first message in the RRC non-connected state.
  • the cell receives the multicast service, and the first cell is the cell where the terminal equipment resides in the RRC connected state.
  • the network device sends the first information instructing the terminal device to receive the multicast service in the RRC non-connected state to the terminal device, so that after the terminal device enters the RRC non-connected state from the RRC connected state, it can pass the RRC non-connected state in the RRC non-connected state.
  • Receiving multicast services in a serving cell in the RRC connected state can avoid multicast service interruption caused by terminal equipment changing the serving cell due to RRC state changes, thereby improving the continuity of multicast services.
  • the first information is also used for the terminal equipment to enter the RRC non-connected state from the RRC connected state without performing cell selection.
  • the first information can cause the terminal device to enter the RRC non-connected state from the RRC connected state without performing cell selection, which can avoid the terminal device from performing the cell selection process and can reduce the processing process of the terminal device, thereby reducing the cost of the terminal device. of power consumption.
  • the terminal device not performing cell selection includes: when the first cell satisfies the camping condition, the camping cell is the first cell.
  • the terminal device when the first cell meets the camping conditions, the terminal device is camped in the first cell, which can ensure that the terminal device is camped in the first cell with better signal quality to receive multicast services, and satisfies
  • the service quality requirements of multicast services can prevent terminal equipment from selecting other cells when the serving cell coverage is good, resulting in the interruption of multicast services; it can also avoid unnecessary cell selection processes, thereby reducing the performance of terminal equipment. Consumption.
  • the first information is carried in an RRC release message, and the RRC release message is used for the terminal device to enter the RRC non-connected state.
  • the first information is carried in the RRC release message for transmission, which can avoid transmitting the first information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thus saving transmission resources. At the same time Compatibility with existing protocols can be improved.
  • the first information is carried in the RRC release message.
  • the network device instructs the terminal device to enter the RRC non-connected state through the RRC release message, and at the same time instructs the terminal device to enter the RRC non-connected state.
  • the purpose is to receive multicast services in the RRC non-connected state, so the reception efficiency of multicast services can be improved. , and is more compatible with existing protocols.
  • the first information may indicate the identity of the multicast service, or the identity of the MRB associated with the multicast service.
  • the network device can indicate in the first information the identifier of the above-mentioned multicast service or the identifier of the MRB associated with the above-mentioned multicast service, so that the terminal device can receive a specific multicast service or certain multicast services, which can avoid The terminal device receives all multicast services, which can reduce the number of multicast services received by the terminal device, thereby reducing the power consumption of the terminal device.
  • the communication method may further include: sending first configuration information to the terminal device, where the first configuration information is used to configure the terminal device to receive the multicast service in the RRC non-connected state.
  • the network device can configure the multicast configuration of the RRC non-connected state to the terminal device in the RRC connected state through the first cell, so that the terminal device can receive the multicast configuration through the first cell according to the configuration information after entering the RRC non-connected state.
  • the terminal device can avoid the interruption of the multicast service due to reacquisition of the multicast configuration, thereby improving the continuity of the multicast service.
  • the first configuration information is also used to configure the terminal device to receive the multicast service in the RRC connected state.
  • a piece of configuration information can not only configure the terminal device to receive multicast services in the RRC non-connected state, but also configure the terminal device to receive multicast services in the RRC connected state, which can avoid the need to separately configure the RRC non-connected state and the RRC connected state. Configure a situation of configuration information, thereby improving the utilization of configuration information. In addition, the number of times of transmitting configuration information can be reduced, and the number of times of information transmission can be reduced, thereby saving transmission resources.
  • the first configuration information is carried in the RRC reconfiguration message.
  • the first configuration information is carried in the RRC reconfiguration message for transmission, which can avoid transmitting the first configuration information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thereby saving transmission. resources while improving compatibility with existing protocols.
  • the communication method may further include: receiving second information from the terminal device, where the second information is used to indicate support for receiving multicast services in the RRC non-connected state.
  • the network device after receiving the capability reported by the terminal device, the network device can send the first information to the terminal device according to the capability of the terminal device, which can avoid the terminal device not supporting RRC non-connected state to receive multicast services and the network device sending the multicast service to the terminal.
  • the device sends the first message.
  • the communication method may also include: sending system information to the terminal device, where the system information is system information required for the RRC non-connected state.
  • the network device sends the system message for the RRC non-connected state to the terminal device, which can avoid the situation that the terminal device cannot correctly perform cell reselection due to missing the system message for the RRC non-connected state.
  • the RRC non-connected state may include an RRC idle state and/or an RRC inactive state.
  • the communication method may further include: sending third information to the terminal device, where the third information is used to indicate not to perform cell selection from the RRC connected state to the RRC non-connected state.
  • the network device sends the third information to the terminal device indicating that the terminal device does not perform cell selection after entering the RRC non-connected state from the RRC connected state, so that the terminal device does not perform cell selection after entering the RRC non-connected state, and the terminal device can avoid Carry out cell selection and subsequent processes, thereby reducing the power consumption of terminal equipment and improving the continuity of multicast services.
  • the third information is carried in an RRC release message or an RRC reconfiguration message.
  • the third information is carried in the RRC release message or the RRC reconfiguration message for transmission, which can avoid transmitting the third information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thereby enabling Save transmission resources and improve compatibility with existing protocols.
  • the communication method may also include: sending fourth information to the terminal device in the RRC connected state.
  • the fourth information is used to indicate the frequency priority.
  • the frequency priority is used by the terminal device when performing cell selection. camping cells are selected in order of frequency priority from high to low.
  • the network device sends the fourth information indicating the frequency priority to the terminal device, so that the terminal device selects the resident cell in order from high to low frequency priority when performing cell selection.
  • the network device can indicate that the frequency of the first cell is the frequency with the highest priority, so that the terminal device can preferentially select the first cell when performing cell selection, which can avoid multicast service interruption and reduce the power consumption of the terminal device.
  • the fourth information is carried in a system message or an RRC release message.
  • the fourth information is carried in the system message or the RRC release message for transmission, which can avoid transmitting the fourth information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thereby saving transmission. resources while improving compatibility with existing protocols.
  • the present application discloses a communication method, which can be applied to terminal equipment, to modules (for example, chips) in the terminal equipment, and to modules that can realize all or part of the functions of the terminal equipment.
  • Logic modules or software The following description takes application to terminal equipment as an example.
  • the communication method may include: receiving third information from the network device in the RRC connected state, the third information being used to indicate entering the RRC non-connected state from the RRC connected state without performing cell selection; entering the RRC non-connected state, the terminal device is connected by the RRC State enters the RRC non-connected state without performing cell selection.
  • the terminal device after the terminal device receives the third information from the network device indicating that it enters the RRC non-connected state from the RRC connected state and does not perform cell selection, it enters the RRC non-connected state from the RRC connected state and does not perform cell selection, which can avoid the problem due to Changes in RRC status may cause multicast service interruption due to serving cell changes, thereby improving the continuity of multicast services.
  • the cell selection process of the terminal equipment can be avoided, the processing process of the terminal equipment can be reduced, and the power consumption of the terminal equipment can be reduced.
  • the terminal device not performing cell selection may include:
  • the camping cell is the first cell
  • the first cell is the serving cell for the terminal device in the RRC connected state.
  • the terminal device when the first cell meets the camping conditions, the terminal device is camped in the first cell, which can ensure that the terminal device is camped in the first cell with better signal quality to receive multicast services, and satisfies
  • the service quality requirements of multicast services can prevent terminal equipment from selecting other cells when the serving cell coverage is good, resulting in the interruption of multicast services; it can also avoid unnecessary cell selection processes, thereby reducing the performance of terminal equipment. Consumption.
  • the third information is carried in an RRC release message or an RRC reconfiguration message.
  • the third information is carried in the RRC release message or the RRC reconfiguration message for transmission, which can avoid the need for special Messages or signaling transmit third information, which can reduce the number of transmitted messages or signaling, thereby saving transmission resources and improving compatibility with existing protocols.
  • the RRC non-connected state may include an RRC idle state and/or an RRC inactive state.
  • the present application discloses a communication method, which can be applied to network equipment, can also be applied to modules (for example, chips) in network equipment, and can also be applied to devices that can realize all or part of the functions of network equipment.
  • Logic modules or software The following description takes application to network equipment as an example.
  • the communication method may include: sending third information to the terminal device in the RRC connected state, where the third information is used to instruct the terminal device to enter RRC non-connected state from the RRC connected state and not perform cell selection.
  • the network device sends the third information to the terminal device indicating that the terminal device enters the RRC non-connected state from the RRC connected state and does not perform cell selection, so that the terminal device enters the RRC non-connected state from the RRC connected state and does not perform cell selection, which can avoid the problem due to Changes in RRC status may cause multicast service interruption due to serving cell changes, thereby improving the continuity of multicast services.
  • the cell selection process of the terminal equipment can be avoided, and the processing process of the terminal equipment can be reduced, thereby reducing the power consumption of the terminal equipment.
  • the terminal device not performing cell selection may include: when the first cell satisfies the camping conditions, the camping cell is the first cell, and the first cell is the service for the terminal device before the RRC connected state. community.
  • the terminal device when the first cell meets the camping conditions, the terminal device is camped in the first cell, which can ensure that the terminal device is camped in the first cell with better signal quality to receive multicast services, and satisfies
  • the service quality requirements of multicast services can prevent terminal equipment from selecting other cells when the serving cell coverage is good, resulting in the interruption of multicast services; it can also avoid unnecessary cell selection processes, thereby reducing the performance of terminal equipment. Consumption.
  • the third information is carried in an RRC release message or an RRC reconfiguration message.
  • the third information is carried in the RRC release message or the RRC reconfiguration message for transmission, which can avoid transmitting the third information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thereby enabling Save transmission resources and improve compatibility with existing protocols.
  • the RRC non-connected state may include an RRC idle state and/or an RRC inactive state.
  • the present application discloses a communication method, which can be applied to terminal equipment, can also be applied to modules (for example, chips) in the terminal equipment, and can also be applied to devices that can realize all or part of the functions of the terminal equipment.
  • Logic modules or software The following description takes application to terminal equipment as an example.
  • the communication method may include: receiving fourth information from the network device in the RRC connection state, the fourth information being used to indicate frequency priority; and when performing cell selection, selecting resident cells in order from high to low frequency priority.
  • the terminal device may select the resident cell in order from high to low frequency priority.
  • the terminal device when the frequency of the serving cell of the terminal device in the RRC connected state is the frequency with the highest priority, the terminal device can preferentially select this cell, which can avoid multicast service interruption caused by the change of the serving cell due to RRC changes. , thereby improving the continuity of multicast services.
  • the fourth information is carried in a system message or an RRC release message.
  • the fourth information is carried in the system message or the RRC release message for transmission, which can avoid transmitting the fourth information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thereby saving transmission. resources while improving compatibility with existing protocols.
  • the present application discloses a communication method, which can be applied to network equipment, can also be applied to modules (for example, chips) in network equipment, and can also be applied to devices that can realize all or part of the functions of network equipment.
  • Logic modules or software The following description takes application to network equipment as an example.
  • the communication method may include: sending fourth information to the terminal device in the RRC connected state, the fourth information being used to indicate frequency priority, and the frequency priority being used by the terminal device according to the frequency priority from high to low when performing cell selection. Select the residential area sequentially.
  • the network device sends the fourth information indicating the frequency priority to the terminal device in the RRC connected state, so that the terminal device selects the resident cell in order from high to low frequency priority when performing cell selection.
  • the network device can instruct the terminal device that the frequency of the serving cell in the RRC connected state is the frequency with the highest priority, so that the terminal device can preferentially select this cell when performing cell selection, which can avoid multicast service interruption and reduce the performance of the terminal device. Consumption.
  • the fourth information is carried in a system message or an RRC release message.
  • the fourth information is carried in the system message or the RRC release message for transmission, which can avoid transmitting the fourth information through special messages or signaling, and can reduce the number of transmitted messages or signaling, thereby saving transmission. resources while improving existing collaboration recommended compatibility.
  • the present application discloses a communication device, which can be applied to terminal equipment, can also be applied to modules (for example, chips) in terminal equipment, and can also be applied to devices that can realize all or part of the functions of terminal equipment.
  • the communication device may include:
  • a transceiver unit configured to receive first information from the network device in the RRC connected state, where the first information instructs the terminal device to receive the multicast service in the RRC non-connected state;
  • Processing unit used to enter the RRC non-connected state
  • the processing unit is also configured to receive the multicast service through the first cell in the RRC non-connected state, and the first cell is the serving cell of the terminal device in the RRC connected state.
  • the terminal equipment enters the RRC non-connected state from the RRC connected state without performing cell selection.
  • the terminal device not performing cell selection may include: when the first cell satisfies the camping condition, the camped cell of the terminal device is the first cell.
  • the first information is carried in the RRC release message, and the processing unit entering the RRC non-connected state may include:
  • the first information may indicate the identity of the multicast service, or the identity of the MRB associated with the multicast service.
  • the transceiver unit is also configured to receive first configuration information from the network device, and the first configuration information is used to configure the terminal device to receive the multicast service in the RRC non-connected state;
  • the processing unit receiving the multicast service through the first cell in the RRC non-connected state may include:
  • the first configuration information is also used to configure the terminal device to receive the multicast service in the RRC connected state.
  • the first configuration information is carried in the RRC reconfiguration message.
  • the transceiver unit is further configured to send second information to the network device, where the second information is used to indicate that the multicast service is supported in the RRC non-connected state.
  • the transceiver unit is also used to obtain system information from the network device.
  • the system information is the system information required by the RRC non-connected state.
  • the RRC non-connected state may include an RRC idle state and/or an RRC inactive state.
  • the transceiver unit is also configured to receive third information from the network device, and the third information is used to indicate not to perform cell selection from the RRC connected state to the RRC non-connected state.
  • the third information is carried in an RRC release message or an RRC reconfiguration message.
  • the transceiver unit is also configured to receive fourth information from the network device, where the fourth information is used to indicate frequency priority;
  • the processing unit is also used to select the resident cells in order from high to low frequency priority when performing cell selection.
  • the fourth information is carried in a system message or an RRC release message.
  • the present application discloses a communication device, which can be applied to network equipment, can also be applied to modules (for example, chips) in network equipment, and can also be applied to devices that can realize all or part of the functions of network equipment.
  • Logic modules or software may include a processing unit and a transceiver unit, wherein:
  • the transceiver unit is configured to send the first information to the terminal equipment in the RRC connected state under the control of the processing unit.
  • the first information instructs the terminal equipment to receive the multicast service in the RRC non-connected state.
  • the first information is used for the terminal equipment to receive the multicast service in the RRC non-connected state.
  • the connected state receives multicast services through the first cell, and the first cell is the cell where the terminal device resides in the RRC connected state.
  • the first information is also used for the terminal equipment to enter the RRC non-connected state from the RRC connected state without performing cell selection.
  • the terminal device not performing cell selection may include: when the first cell satisfies the camping condition, the camping cell is the first cell.
  • the first information is carried in an RRC release message, and the RRC release message is used for the terminal device to enter the RRC non-connected state.
  • the first information may indicate the identity of the multicast service, or the identity of the MRB associated with the multicast service.
  • the transceiver unit is also configured to send first configuration information to the terminal device under the control of the processing unit, where the first configuration information is used to configure the terminal device to receive the multicast service in the RRC non-connected state.
  • the first configuration information is also used to configure the terminal device to receive the multicast service in the RRC connected state.
  • the first configuration information is carried in the RRC reconfiguration message.
  • the transceiver unit is also configured to receive second information from the terminal device under the control of the processing unit, where the second information is used to indicate support for receiving multicast services in the RRC non-connected state.
  • the transceiver unit is also used to send system information to the terminal device under the control of the processing unit.
  • the system information is system information required for the RRC non-connected state.
  • the RRC non-connected state may include an RRC idle state and/or an RRC inactive state.
  • the transceiver unit is also configured to send third information to the terminal device under the control of the processing unit, where the third information is used to indicate not to perform cell selection from the RRC connected state to the RRC non-connected state.
  • the third information is carried in an RRC release message or an RRC reconfiguration message.
  • the transceiver unit is also configured to send fourth information to the terminal device in the RRC connection state under the control of the processing unit.
  • the fourth information is used to indicate the frequency priority, and the frequency priority is used for the terminal device.
  • the resident cells are selected in order of frequency priority from high to low.
  • the fourth information is carried in a system message or an RRC release message.
  • the present application discloses a communication device, which can be applied to terminal equipment, can also be applied to modules (for example, chips) in terminal equipment, and can also be applied to devices that can realize all or part of the functions of terminal equipment.
  • the communication device may include:
  • a transceiver unit configured to receive third information from the network device in the RRC connected state, where the third information is used to indicate that cell selection is not performed when entering the RRC non-connected state from the RRC connected state;
  • the processing unit is used to enter the RRC non-connected state.
  • the terminal equipment enters the RRC non-connected state from the RRC connected state without performing cell selection.
  • the terminal device not performing cell selection may include:
  • the camping cell is the first cell
  • the first cell is the serving cell for the terminal device in the RRC connected state.
  • the third information is carried in an RRC release message or an RRC reconfiguration message.
  • the RRC non-connected state may include an RRC idle state and/or an RRC inactive state.
  • the present application discloses a communication device, which can be applied to network equipment, can also be applied to modules (for example, chips) in network equipment, and can also be applied to devices that can realize all or part of the functions of network equipment.
  • the communication device may include a processing unit and a transceiver unit, wherein:
  • the transceiver unit is configured to send third information to the terminal device in the RRC connected state under the control of the processing unit.
  • the third information is used to instruct the terminal device to enter RRC non-connected state from the RRC connected state and not perform cell selection.
  • the terminal device not performing cell selection may include: when the first cell satisfies the camping condition, the camping cell is the first cell, and the first cell is the terminal device in the RRC connected state before service area.
  • the third information is carried in an RRC release message or an RRC reconfiguration message.
  • the RRC non-connected state may include an RRC idle state and/or an RRC inactive state.
  • the present application discloses a communication device, which can be applied to terminal equipment, can also be applied to modules (for example, chips) in terminal equipment, and can also be applied to realize all or part of the terminal equipment functions. logic modules or software.
  • the communication device may include:
  • a transceiver unit configured to receive fourth information from the network device in the RRC connection state, where the fourth information is used to indicate frequency priority;
  • the processing unit is configured to select the resident cells in order from high to low frequency priority when performing cell selection.
  • the fourth information is carried in a system message or an RRC release message.
  • the present application discloses a communication device, which can be applied to network equipment, can also be applied to modules (for example, chips) in network equipment, and can also be applied to realize all or part of the network equipment functions.
  • logic module or software may include a processing unit and a transceiver unit, wherein:
  • the transceiver unit is configured to send fourth information to the terminal device under the control of the processing unit.
  • the fourth information is used to indicate the frequency priority.
  • the frequency priority is used by the terminal device according to the frequency priority from high to low when performing cell selection. Select the residential cells sequentially.
  • the fourth information is carried in a system message or an RRC release message.
  • the present application discloses a communication device.
  • the communication device may be a terminal device (or network device) in the above method embodiment, or a chip or processor provided in the terminal device (or network device).
  • the communication device includes a processor.
  • the processor is coupled to a memory.
  • the memory is used to store programs or instructions. When the program or instructions are executed by the processor, the communication device performs the above method embodiment by the terminal device (or network device), or A method executed by a chip or processor in a terminal device (or network device).
  • the present application discloses a communication device.
  • the communication device may be the terminal device (or network device) in the above method embodiment, or a chip provided in the terminal device (or network device).
  • the communication device includes a processor and a memory, and the memory is used to store programs or instructions. When the program or instructions are executed by the processor, the communication device causes the communication device to execute the above method by the terminal device (or network device), or the terminal device (or A method executed by a chip or processor in a network device.
  • the present application discloses a communication device.
  • the communication device may be the terminal device (or network device) in the above method embodiment, or a chip provided in the terminal device (or network device).
  • the communication device includes a communication interface and a processor, and optionally, a memory. Wherein, the memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface.
  • the processor executes the computer program or instructions, the communication device is caused to execute the above method by the terminal device (or network device), Or the method executed by the chip in the terminal device (or network device).
  • the present application discloses a communication system, which may include a terminal device that performs the communication method disclosed in the above first aspect (or third aspect, or fifth aspect) and a terminal device that performs the above second aspect (or The fourth aspect, or the sixth aspect) discloses a network device for the communication method.
  • the present application discloses a computer-readable storage medium.
  • Computer programs or computer instructions are stored on the computer-readable storage medium.
  • the above aspects are implemented. Public communication methods.
  • the present application discloses a chip, including a processor for executing a program stored in a memory.
  • the program is executed, the chip is caused to execute the above method.
  • the memory is located outside the chip.
  • the present application discloses a computer program product.
  • the computer program product includes computer program code.
  • the computer program code is run by a processor, the above communication method is executed.
  • Figure 1 is a schematic diagram of a network architecture disclosed in an embodiment of this application.
  • Figure 2 is a schematic system architecture diagram of a 5G system disclosed in the embodiment of this application.
  • FIG. 3 is a schematic system architecture diagram of an LTE system disclosed in the embodiment of the present application.
  • Figure 4 is a schematic diagram of a NE-DC scenario disclosed in the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a CA scenario disclosed in the embodiment of the present application.
  • Figure 6 is a schematic flowchart of a communication method disclosed in the embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another communication method disclosed in the embodiment of the present application.
  • FIG. 8 is a schematic flowchart of yet another communication method disclosed in the embodiment of the present application.
  • Figure 9 is a schematic structural diagram of a communication device disclosed in an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of another communication device disclosed in the embodiment of the present application.
  • Figure 11 is a schematic structural diagram of yet another communication device disclosed in an embodiment of the present application.
  • the embodiments of the present application disclose a communication method and device for improving the continuity of multicast services. Each is explained in detail below.
  • Figure 1 is a schematic diagram of a network architecture disclosed in an embodiment of the present application.
  • the network architecture may include a terminal device 101 and a network device 102.
  • the communication between the terminal device 101 and the network device 102 may include uplink communication (ie, communication from the terminal device 101 to the network device 102) and downlink communication (ie, communication from the network device 102 to the terminal device 101).
  • uplink communication the terminal device 101 is used to send uplink signals to the network device 102; the network device 102 is used to receive the uplink signals from the terminal device 101.
  • the uplink signal may be uplink control information and may be transmitted through a physical uplink control channel (PUCCH).
  • the uplink signal can also be uplink data, which can be transmitted through a physical uplink share channel (PUSCH).
  • the network device 102 is used to send downlink signals to the terminal device 101; the terminal device 101 is used to receive downlink signals from the network device 102.
  • the downlink signal may be downlink control information and may be transmitted through a physical downlink control channel (PDCCH).
  • the downlink signal can also be downlink data, which can be transmitted through a physical downlink share channel (PDSCH).
  • Terminal equipment can be called user equipment (UE), mobile station (MS), mobile terminal (MT), etc. It refers to a device that provides voice and/or data connectivity to users.
  • the terminal device can be a mobile phone, a handheld terminal, a customer premise equipment (CPE), a laptop, a subscriber unit, a cellular phone, a smart phone, or a computing device.
  • CPE customer premise equipment
  • wireless data card personal digital assistant (PDA) computer, tablet computer, computer with wireless transceiver function, wireless modem, tactile terminal device, handheld device (handheld), laptop Computer (laptop computer), session initiation protocol (SIP) phone, cordless phone (cordless phone) or wireless local loop (WLL) station, machine type communication (MTC) terminal, Wearable devices (such as smart watches, smart bracelets, pedometers, etc.), vehicle-mounted terminal devices (such as cars, bicycles, electric vehicles, airplanes, ships, trains, high-speed rail, etc.), extended reality (extended reality, XR) terminal devices , virtual reality (VR) terminal equipment, augmented reality (AR) terminal equipment, wireless terminals in industrial control (industrial control), smart home equipment (such as refrigerators, TVs, air conditioners, electricity meters, etc.), smart Robots, workshop equipment, wireless terminals in self-driving, wireless terminals in remote medical surgery, wireless data cards, wireless terminals in smart grid, transportation safety Wireless terminals in smart cities, wireless terminals in smart homes, flying equipment
  • the terminal device may also be a terminal device in a future communication system (such as a sixth generation (6th generation, 6G) communication system, etc.) or a terminal device in a future evolved public land mobile network (public land mobile network, PLMN), etc. .
  • 6G networks can further expand the form and function of fifth generation (5th generation, 5G) communication terminal equipment.
  • 6G terminal equipment includes but is not limited to cars, cellular network terminal equipment (integrated satellite terminal functions), drones, Internet of things (IoT).
  • the above network equipment may be an access network equipment or a core network equipment.
  • Access network equipment is a radio access network (RAN) device or node that provides wireless access to terminal equipment. It has wireless transceiver functions and is mainly responsible for wireless resource management and quality of service (QoS) on the air interface side. ) functions such as stream management, data compression and encryption.
  • Access network equipment can include various forms of base stations, such as: macro base stations, micro base stations (also called small stations), pico base stations, small stations, relay stations, access point satellites, balloon stations, etc. Access network equipment may also include evolved base stations (evolved Node B, eNB or eNodeB) in long term evolution (LTE).
  • eNB evolved Node B
  • LTE long term evolution
  • Access network equipment can also include next generation base stations (next generation Node B, gNB) or transmission and receiving points (transmitting and receiving point, TRP) in the 5G network.
  • Access network equipment can also include base stations evolved after the third generation partnership project (3GPP), or base stations in future evolved PLMNs, broadband network gateways (BNG), 3GPP aggregation switches, or Non-3GPP access equipment, access point (AP), transmitting point (TP), mobile switching center, etc. in the WiFi system, or device-to-device (D2D), Equipment that performs base station functions in vehicle-to-everything (V2X) and machine-to-machine (M2M) communications.
  • 3GPP third generation partnership project
  • BNG broadband network gateways
  • TP transmitting point
  • D2D device-to-device
  • Equipment that performs base station functions in vehicle-to-everything (V2X) and machine-to-machine (M2M) communications.
  • V2X vehicle-to-everything
  • Core network equipment refers to equipment in the core network (CN) that provides business support for terminal equipment. It is mainly responsible for registration, call connection, billing, mobility management, providing user connections, user management, and business management. Complete functions such as bearer, data processing and routing.
  • Core network equipment can correspond to different equipment in different communication systems.
  • 4G fourth generation
  • MME mobility management entity
  • serving gateway serving gateway
  • S-GW serving gateway
  • AMF access and mobility management function
  • SMF session management function
  • UPF user plane function
  • next generation communication system or future communication system it may be one or more network elements, equipment or entities that provide service support for terminal equipment.
  • the network architecture shown in Figure 1 is not limited to only include the terminal device 101 and network device 102 shown in the figure, but may also include other terminal devices and network devices not shown in the figure. Specifically, this application is in No more enumeration here.
  • the above network architecture can be applied to 5G systems.
  • the system architecture of the 5G system can be shown in Figure 2.
  • the above network architecture can also be applied to LTE systems.
  • the system architecture of the LTE system can be shown in Figure 3.
  • the above network architecture can be applied to 5G systems or LTE systems that are independently deployed (i.e., independent networking), or can be applied to 5G systems or LTE systems that are not independently deployed (i.e., non-independent networking), such as dual connectivity (DC) scenarios, carrier aggregation (CA) scenarios, etc.
  • DC scenarios can include next generation (NG) EN-DC, NE-DC and new radio (NR)-DC.
  • the E in EN and NE represents the evolved universal mobile telecommunications system (UMTS) terrestrial radio access network (evolvedUMTS terrestrial radio access network, E-UTRAN), that is, the 4G wireless access network, and N represents NR.
  • UMTS evolved universal mobile telecommunications system
  • E-UTRAN evolved universal mobile telecommunications system terrestrial radio access network
  • N represents NR.
  • UMTS evolved universal mobile telecommunications system
  • NE-DC scenario can be shown in Figure 4.
  • the schematic diagram of the CA scenario can be shown in Figure 5.
  • the above network architecture can also be applied to narrowband-internet of things (NB-IoT), global system for mobile communications (GSM), enhanced data rate GSM evolution system (enhanced data rate for GSM evolution, EDGE), wideband code division multiple access system (wideband code division multiple access, WCDMA), code division multiple access 2000 system (code division multiple access, CDMA2000), time division synchronous code division multiple access system (time division-synchronization code communication systems evolved after 5G such as division multiple access (TD-SCDMA) and 6G.
  • NB-IoT narrowband-internet of things
  • GSM global system for mobile communications
  • GSM evolution system enhanced data rate for GSM evolution, EDGE
  • wideband code division multiple access system wideband code division multiple access, WCDMA
  • code division multiple access 2000 system code division multiple access, CDMA2000
  • time division synchronous code division multiple access system time division-synchronization code communication systems evolved after 5G such as division multiple access (TD-SCDMA) and 6G.
  • terminal equipment has three RRC states: RRC connected state, RRC idle state, and RRC inactive state.
  • RRC connection state an RRC connection is established between the terminal device and the access network device, and signaling and data transmission can be performed between the terminal device and the access network device; when there is no data to be transmitted between the terminal device and the access network device
  • the access network equipment can release the terminal equipment to the RRC idle state.
  • RRC idle state there is no RRC connection between the access network equipment and the terminal equipment. At this time, there is no data transmission and no RRC between the terminal equipment and the access network equipment. Signaling connection.
  • the RRC inactive state is introduced in NR.
  • the terminal device In the RRC inactive state, the terminal device generally stops data transmission (the terminal can also perform small packet transmission, etc. in the RRC inactive state), but the access network device still maintains the context information of the terminal device.
  • the advantage of introducing RRC inactive state is that compared with RRC idle state, in RRC inactive state, because the access network device still retains the context information of the terminal device, the RRC connected state can be restored more quickly. When services arrive, Reduce service transmission delay.
  • the power consumption of terminal equipment in the RRC inactive state is relatively low (similar to the RRC idle state), so it is also conducive to energy saving of the terminal equipment.
  • the access network device can release the terminal device to the RRC idle state or the RRC inactive state by sending an RRC release (Release) message to the terminal device.
  • RRC release Release
  • the terminal device When the RRCRelease message received by the terminal device contains the suspend configuration (suspendConfig), the terminal device enters the RRC inactive state and executes the cell selection process.
  • the RRCRelease message received by the terminal device does not contain suspendConfig, in addition to the Internet protocol (IP) multimedia subsystem (IP multimedia subsystem, IMS) and voice (voice) evolved packet system (EPS) fallback ( Except for scenarios such as fallback) and cell reselection in different systems, the terminal device enters the RRC idle state and executes the cell selection process.
  • IP multimedia subsystem IP multimedia subsystem
  • IMS Internet protocol
  • EPS voice evolved packet system
  • the terminal device in the RRC connected state When the terminal device in the RRC connected state receives the RRC Release message, the terminal device enters the RRC idle state or the RRC inactive state and performs cell selection to select a suitable cell or an acceptable cell to camp on.
  • Terminal equipment can determine whether a cell is suitable for access based on cell selection criteria (also called S criteria) and through cell reception power, cell reception quality and other parameters.
  • S criteria also called S criteria
  • the conditions for satisfying the S criterion are:
  • S rxlev is the cell selection receive power value (cell selection RX level value) in decibel (dB)
  • S qual is the cell selection quality value (cell selection quality value) in dB.
  • Q rxlevmeas is the measured received power value of the cell
  • Q rxlevmin is the minimum received power value required by the cell
  • Q rxlevminoffset is the offset value of Q rxlevmin
  • P compensation is the power compensation value
  • Qoffset temp is the offset applied to the cell.
  • Q qualmeas is the measured cell quality value
  • Q qualmin is the minimum quality value required by the cell
  • Q qualminoffset is the offset value of Q qualmin .
  • the UE may perform one of the following two processes when performing cell selection.
  • the terminal equipment will scan all RF channels in the NR frequency band according to its own capabilities, and scan all RF channels in each frequency band except the shared spectrum. In terms of efficiency, the terminal device only needs to search for the cell with the strongest signal. Once a suitable cell is found (that is, a cell that satisfies the S criterion), it will select the cell.
  • This process requires the use of frequency information stored by the terminal device, which comes from previously received measurement control information or from previously detected cell parameter information. Optionally, information from previously received information on cell parameters is also required.
  • a suitable cell ie, a cell that satisfies the S criterion
  • the terminal device selects the cell. If no suitable cell is found, the initial cell selection process can be initiated.
  • the terminal device After the terminal device performs cell selection, it will start the system message acquisition process.
  • the terminal device in the RRC idle/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 higher priority Or a cell with better signal quality is used as the serving cell. We call this process cell reselection.
  • the process of cell reselection includes starting neighbor cell measurement (judging whether to start neighbor cell measurement based on the measurement startup conditions), reselection evaluation decision (judging whether the signal quality of the neighboring cell meets the cell reselection standard, if so, perform cell reselection, otherwise the cell will remain resident) There are three stages: in the current cell) and cell reselection execution (receiving system messages of the target cell, and camping on the new cell if the target cell has no access restrictions). They are introduced below.
  • Whether to start neighbor cell measurement can be determined according to the measurement start condition. If the measurement start condition is met, the terminal device can start measuring the cell quality of the corresponding neighbor cell. Whether the neighboring cell meets the measurement start condition can be determined based on the reselection priority of the neighboring cell (or the priority of the frequency point where the neighboring cell is located) and the cell quality of the serving cell. It should be understood that a neighboring cell is a cell adjacent to the serving cell or a broadcast cell.
  • neighbor cell measurement can be started unconditionally, that is, neighbor cell measurement can be started directly.
  • the neighbor cell reselection priority is lower than or equal to the serving cell reselection priority
  • the cell quality of the serving cell can be measured first, and then the cell quality of the serving cell can be compared with the cell quality threshold issued by the network.
  • the serving cell When the cell quality of the serving cell is greater than or equal to (or equal to) the cell quality threshold, neighbor cell measurement may not be started.
  • the cell quality of the serving cell is less than (or less than or equal to) the cell quality threshold, neighbor cell measurement may be started.
  • the terminal device can start to evaluate whether to perform cell reselection to the neighbor cell. Neighboring cells have different reselection priorities, and the reselection evaluation decisions can be different.
  • the reselection priority of the neighboring cell is greater than the reselection priority of the serving cell, when the terminal device self-camps in the current serving cell for more than 1 second, and the cell quality of the neighboring cell meets the requirements within a specific time period.
  • cell reselection to high reselection priority neighboring cells can be performed.
  • these cells can be sorted by the cell reselection criterion (R criterion) and converted into a same-frequency reselection problem. Select A top-ranked neighborhood.
  • Q meas,s is the measured receiving power value of the serving cell
  • Q hyst is the cell reselection hysteresis value
  • Qoffset temp is the additional offset for cell selection and reselection, which is temporarily used when the RRC connection establishment fails
  • Q meas,n is the measured received power value of the neighboring cell
  • Qoffset is the offset between the serving cell and the neighboring cell.
  • cell reselection can be performed according to the R criterion. That is, calculate the cell signal quality level of each neighboring cell and the current serving cell that meet the cell selection criteria; then sort according to the cell signal quality level, select the cell with the highest cell signal quality level or select the cell close to the maximum within a certain range under multi-beam operation cells, and then select the cell with the largest number of beams whose beam signal quality meets the requirements among these cells as the best cell. If the best cell continues to meet the cell reselection criteria within a certain duration interval, and the terminal equipment is in the current serving cell If the terminal stays for more than 1s, the terminal device starts cell reselection to the neighboring cell.
  • the reselection priority of the neighboring cell is lower than the reselection priority of the serving cell
  • the terminal device camped in the serving cell for more than 1 second and the cell quality of the serving cell is lower than a specific threshold
  • the cell quality of the neighbor cell with low reselection priority exceeds a specific period of time. If another specific threshold is met, cell reselection to the low reselection priority neighbor cell is performed.
  • the cell reselection of the higher reselection priority frequency should be prioritized over the cell reselection of the lower reselection priority frequency, that is, the terminal device is reselected first. Cells with high reselection priority frequencies.
  • the terminal device After completing the neighbor cell measurement and determining that there is a neighbor cell that meets the cell reselection conditions, the terminal device can start trying to camp on a new cell.
  • the terminal device needs to receive system messages from the target neighboring cell, and then determine whether the resident conditions of the neighboring cell are met based on the system messages.
  • the above determination may include determining whether the target neighboring cell allows terminal equipment to access, etc.
  • the terminal device may exclude the target neighbor cell from the candidate cell for 300 seconds (or at most 300 seconds).
  • the terminal device can camp in the target neighboring cell.
  • the above-mentioned cell reselection priority is related to the frequency point where the cell is located.
  • Cells on the same frequency point on the same radio access technology (RAT) have the same cell reselection priority.
  • Cell reselection priorities of different frequency points are May be the same or different. That is, for co-frequency neighboring cells, they have the same cell priority; for inter-frequency cells, they can be divided into high-priority neighboring cells, same-priority neighboring cells and low-priority neighboring cells.
  • the network can configure the frequency priority during the cell reselection process.
  • the priority of the cell reselection can be sent to the terminal device through system messages (cell general cell reselection) or through dedicated signaling (such as RRC Release message). ).
  • Broadcast communication service refers to a communication service that simultaneously provides the same business and the same specific content data to all terminal devices within the broadcast coverage area, that is, all terminal devices within the broadcast coverage area can receive data.
  • broadcast supports reception in RRC idle state, RRC inactive state and RRC connected state.
  • Broadcast adopts point-to-multipoint (PTM) transmission mode, that is, an access network device can Send an MBS data packet to multiple terminal devices through the air interface.
  • the terminal devices can use a public wireless network temporary identifier (radio network temporary identifier, RNTI), such as group radio network temporary identifier (G-RNTI). ), to decode the downlink data of the broadcast session scheduled by the access network device.
  • RNTI radio network temporary identifier
  • G-RNTI group radio network temporary identifier
  • NR MBS broadcast uses a two-step configuration method.
  • Access network equipment can broadcast system information block (SIB) 20, which carries MBS control channel (MBS control channel, MCCH) configuration for MBS broadcast, including MCCH repetition period and offset, and MCCH window duration. , MCCH window starting time slot, MCCH modification period, etc.
  • MCCH messages (or information sent through the MCCH channel) are transmitted periodically, with a configured repetition period and within the configured MCCH transmission window.
  • MCCH is configured per cell (per cell). In Rel-17, each cell has only one MCCH configuration.
  • MCCH carries MBS broadcast configuration information and provides a list of MBS broadcast sessions being provided by the cell. For each provided MBS broadcast session, it provides, for example, the identity (ID) of the broadcast session (temporary multicast group identifier). multicast group identifier (TMGI), G-RNTI, optionally provides broadcast MRB configuration, MBS traffic channel (MBS traffic channel (MBS traffic channel, MTCH)) discontinuous reception (DRX) configuration, can provide List of neighbor cells for this broadcast session.
  • ID identity
  • TMGI multicast group identifier
  • G-RNTI optionally provides broadcast MRB configuration, MBS traffic channel (MBS traffic channel (MBS traffic channel, MTCH)) discontinuous reception (DRX) configuration, can provide List of neighbor cells for this broadcast session.
  • Terminal equipment interested in receiving MBS broadcast services should apply the MCCH information acquisition procedure when entering a cell where SIB20 is provided (e.g., at power-on, after the terminal equipment moves a cell), and upon receiving a MCCH change notification due to the start of a new MBS service hour.
  • NR MBS multicast only supports terminal equipment to receive MBS multicast services in the RRC connected state.
  • MBS multicast can use point to point (PTP) transmission or PTM transmission.
  • PTP point to point
  • Typical multicast service scenarios include public safety and mission critical, interactive Internet protocol television (IPTV), live video, etc.
  • a terminal device that receives an MBS multicast service must undergo an authentication process with the core network before it can accept an MBS multicast service (or MBS session).
  • MBS session is identified by TMGI.
  • the terminal device receives the connection-state multicast configuration delivered by the access network device through dedicated signaling (such as RRC reconfiguration message), such as the configuration of the multicast MRB.
  • RRC reconfiguration message such as the configuration of the multicast MRB.
  • Each MBS multicast session can be associated with one or more multicast MRBs.
  • the configuration of the multicast MRB will include TMGI information to indicate the multicast session associated with the multicast MRB.
  • the number of terminal devices in the RRC connected state that the cell can accommodate may exceed the number. Therefore, in Rel-18, in order to alleviate network congestion, it is proposed to support terminal equipment to receive MBS multicast services in the RRC inactive state. For example, when the terminal device has no unicast service but only multicast service, the network can release the terminal device to the RRC inactive state to receive multicast. This will not only help alleviate network congestion, but also help save energy in terminal equipment.
  • terminal equipment there are the following possible ways for terminal equipment to obtain the RRC inactive multicast configuration (but are not limited to the following methods):
  • One is similar to Rel-17 broadcast, in which the terminal equipment obtains the information of one or more multicast control channels through system messages.
  • Configuration obtain the PTM configuration of RRC inactive multicast through the multicast control channel.
  • the multicast control channel can be a specific logical channel and can be identified by a specific logical channel ID.
  • the terminal device obtains the RRC inactive multicast configuration through dedicated signaling (for example, through the RRC reconfiguration message) in the RRC connected state.
  • the terminal device When the terminal device receives the RRC Release message (which contains suspendConfig) issued by the network indicating that it enters the RRC inactive state, the terminal device will enter the RRC inactive state and perform cell selection. When the terminal device selects another cell that satisfies the S criterion, it needs to reacquire the RRC inactive multicast configuration of the cell and then receive multicast services according to the multicast configuration of the cell. Reacquiring the RRC inactive multicast configuration of the cell and then receiving multicast will cause the reception of multicast services to be temporarily interrupted, affecting the continuity of multicast services. In addition, when the terminal device has good coverage in the serving cell, unnecessary execution of the cell selection process by the terminal device will increase the power consumption of the terminal device.
  • the terminal device has good coverage in the serving cell, unnecessary execution of the cell selection process by the terminal device will increase the power consumption of the terminal device.
  • embodiments of the present application provide a communication method for the terminal device to receive multicast services in the RRC non-connected state through the serving cell of the terminal device in the RRC connected state.
  • Figure 6 is a schematic flow chart of a communication method disclosed in an embodiment of the present application. As shown in Figure 6, the communication method may include the following steps.
  • the network device sends the first information to the first terminal device in the RRC connection state.
  • the first terminal device receives the first information from the network device in the RRC connection state.
  • the network device may send the first information to the first terminal device in the RRC connection state.
  • the first terminal device is the terminal device in the claims and summary of the invention. In order to distinguish a specific terminal device here, the terminal device in the claims and the summary of the invention is called the first terminal device.
  • the number of terminal devices that communicate with the network device in the RRC connected state is relatively large. This can be understood as the number of terminal devices that communicate with the network device in the RRC connected state is greater than the first threshold. It can also be understood as the number of terminal devices that communicate with the network device in the RRC connected state. The ratio between the number and the number of terminal devices in the RRC connection state that the network device can accommodate is greater than the second threshold.
  • a terminal device that communicates with the network device in the RRC connection state can be understood as a terminal device that communicates with the network device and is in the RRC connection state, or can also be understood as a terminal device that establishes an RRC connection with the network device.
  • the number of terminal devices accessing the RRC connection state of the cell where the terminal device is located is relatively large. It can be understood that the number of terminal devices accessing the RRC connection state of the cell where the terminal device is located is greater than the third threshold. It can also be understood as the number of terminal devices accessing the RRC connection state of the cell where the terminal device is located. The ratio between the number of terminal devices in the RRC connected state and the number of terminal devices in the RRC connected state that the cell can accommodate is greater than the fourth threshold.
  • the number of terminal devices performing RRC connected multicast services in the cell where the terminal equipment is located is relatively large, which can be understood to mean that the number of terminal devices performing RRC connected multicast services in the cell where the terminal equipment is located is greater than the fifth threshold, which can also be understood as the number of terminal devices performing RRC connected multicast services in the cell where the terminal equipment is located.
  • the ratio between the number of terminal devices in the cell that performs multicast services in the RRC connected state and the number of terminal devices in the RRC connected state that the cell can accommodate is greater than the sixth threshold.
  • multicast services may also be called multicast sessions.
  • the multicast service here can be an MBS multicast service or other multicast services, which are not limited here.
  • the first terminal device is a terminal device that establishes an RRC connection with the network device, that is, a terminal device that communicates with the network device and is in an RRC connection state.
  • the first terminal device can be any terminal device that establishes an RRC connection with the network device, which means that in order to alleviate network congestion, the network device can allow one or more terminal devices to receive multicast services in the RRC non-connected state.
  • the first terminal device can also be a terminal device that has established an RRC connection with the network device and has good coverage. This means that in order to alleviate network congestion, the network device can allow one or more terminal devices with good coverage to receive multicast in the RRC non-connected state. business.
  • the first information indicates that the first terminal device receives the multicast service in the RRC non-connected state.
  • the RRC non-connected state can be the RRC idle state, the RRC inactive state, or the RRC idle state and the RRC inactive state.
  • the first information may be carried in the RRC release message, that is, the first information is sent to the first terminal device through the RRC release message, that is, the network device sends the RRC release message to the first terminal device, and the RRC release message includes the first information.
  • the first information may also be carried in the RRC reconfiguration message.
  • the first information can also be carried in other messages or signaling, which is not limited here.
  • the first information may be configuration information that configures the first terminal device to receive the multicast service in the RRC non-connected state.
  • the configuration information may include the configuration of the multicast MRB.
  • the first information can also be other information, which is not limited here.
  • Instructing the first terminal device to receive the multicast service in the RRC non-connected state can be understood as (or replaced by) indicating that the multicast service configuration of the first terminal device is used in the RRC non-connected state. It can also be understood as instructing the first terminal device to configure the multicast service for the RRC non-connected state.
  • the multicast service is in the activated state or the multicast service has not been released. It can also be understood as instructing the first terminal device to enter the RRC non-connected state for the purpose of receiving the multicast service. It can also be understood as instructing the first terminal device to enter the RRC non-connected state.
  • the multicast MRB of the device is not suspended or released.
  • the first information may be indicated by 1 bit, a flag bit or an indication bit.
  • the network device may send a message or signaling including the bit, flag bit or indication bit corresponding to the first information to the first terminal device.
  • the first terminal device may receive a message or signaling including a bit, a flag bit or an indication bit corresponding to the first information.
  • the network device does not need to send the first information to the first terminal device, the network device does not send a message or signaling including the bit, flag bit or indication bit corresponding to the first information to the first terminal device.
  • the first terminal device cannot receive the message or signaling including the bit, flag bit or indication bit corresponding to the first information.
  • the first information may also be indicated by 1 bit. For example, when the network device needs to send the first information to the first terminal device, the value of this bit is 1. In the case where the network device does not need to send the first information to the first terminal device, the value of this bit is 0. vice versa.
  • the first information may also be indicated by multiple bits. For example, when the network device needs to send the first information to the first terminal device, the values of these multiple bits are all 1. When the network device does not need to send the first information to the first terminal device, the values of these multiple bits are all 0.
  • the first information may indicate that the first terminal device receives the multicast service in the RRC non-connected state, but does not indicate which multicast service or services are specifically received.
  • the first information indicates that the received multicast service may be an activated multicast service and/or a multicast service being received by the terminal device.
  • the first information may also indicate which specific multicast service or services the first terminal device receives in the RRC non-connected state.
  • the first information may indicate the identifier of the multicast service or the identifier of the MRB.
  • the multicast service here is a multicast service that needs to be received by the first terminal device in the RRC non-connected state.
  • the identifier of the multicast service may be the name of the multicast service, the TMGI corresponding to or associated with the multicast service, or the RNTI corresponding to or associated with the multicast service.
  • the TMGI corresponding or associated with the multicast service can be understood as the TMGI that identifies the multicast service.
  • the RNTI corresponding or associated with the multicast service can be understood as the RNTI used for scrambling/or descrambling the multicast service.
  • the MRB is associated with the multicast service.
  • the first information may indicate that the first terminal device receives the first multicast service in the RRC non-connected state. Instructing the first terminal device to receive the first multicast service in the RRC non-connected state may be understood as indicating that the first multicast service is configured for the RRC non-connected state, or may be understood as indicating that the first multicast service is in the activated state or the first The multicast service is not released, which can also be understood as indicating that the purpose of the first terminal device entering the RRC non-connected state is to receive the first multicast service.
  • one multicast service can correspond to one or more multicast MRBs), which can also be understood as indicating that the MRB associated with the first multicast service is not suspended or released.
  • the first terminal device enters the RRC non-connected state.
  • the network device When the network device wants to release the first terminal device to the RRC non-connected state, it may send an RRC release message to the first terminal device in the RRC connected state.
  • the first terminal device can receive the RRC release message from the network device in the RRC connected state, and then can enter the RRC non-connected state according to the RRC release message, that is, switch from the RRC connected state to the RRC non-connected state.
  • the RRC release message includes suspendConfig.
  • the RRC release message does not include suspendConfig. Therefore, after receiving the RRC release message, the first terminal device can enter the RRC idle state according to the RRC release message if the RRC release message does not include suspendConfig. If the RRC release message includes suspendConfig, it can enter the RRC idle state according to the RRC release message. RRC is inactive.
  • the network device may first send the first information to the first terminal device, and then may send the RRC release message to the first terminal device.
  • the first terminal device may receive the first information first, and then receive the RRC release message.
  • the first terminal device receives the multicast service through the first cell in the RRC non-connected state.
  • the first terminal device After the first terminal device enters the RRC non-connected state, it can receive the multicast service through the first cell in the RRC non-connected state, that is, it can receive the multicast service through the first cell in the RRC non-connected state according to the first information.
  • the first cell is the serving cell of the first terminal device in the RRC connected state.
  • the serving cell can be a primary cell (primary cell, PCell) or a secondary cell (secondary cell, Scell).
  • the serving cell of the first terminal device in the RRC connected state can be understood as the serving cell before entering the RRC non-connected state, or the serving cell in the RRC connected state before entering the RRC non-connected state. It can also be understood as the first terminal device.
  • the first terminal device may receive the multicast service through the first cell in the RRC connected state, or may not start receiving the multicast service through the first cell in the RRC connected state, or may not receive the multicast service through the first cell in the RRC connected state.
  • the first cell When the first terminal device receives the multicast service through the first cell in the RRC connected state, the first cell may be the PCell of the first terminal device in the RRC connected state, or it may be the Scell of the first terminal device in the RRC connected state. .
  • the first cell When the first terminal device does not start receiving multicast services in the RRC connected state, or does not receive multicast services through the first cell in the RRC connected state, the first cell provides the first terminal device with the RRC connected state. Connected PCell.
  • the first terminal device when the first terminal device receives the first multicast service through the first secondary cell in the RRC connected state, after the first terminal device enters the RRC non-connected state from the RRC connected state, the first terminal device camps on On the first secondary cell, after entering the RRC non-connected state, there is no need to re-obtain the RRC non-connected state multicast configuration of the first secondary cell.
  • the RRC connected state can be used to receive the first multicast service configuration in the RRC Receiving the first multicast service in a non-connected state can ensure the continuity of the first terminal device receiving the first multicast service on the first secondary cell.
  • the first terminal equipment When the first terminal equipment enters the RRC non-connected state from the RRC connected state, the first terminal equipment may not perform cell selection. It can be understood that when the first terminal equipment enters the RRC non-connected state from the RRC connected state, the first terminal equipment does not perform cell selection. It can also be understood that after the first terminal equipment enters the RRC non-connected state from the RRC connected state, the first terminal equipment The terminal device does not perform cell selection.
  • the first terminal device does not perform cell selection, which can be understood as the first terminal device does not evaluate the cell signal quality according to the cell selection criteria and remains camped in the first cell.
  • the first terminal device will still perform cell reselection and perform cell reselection measurement, evaluation and execution according to the cell reselection criteria. .
  • the first terminal device does not perform cell selection. It can also be understood that when the first cell satisfies the camping condition, the camping cell is the first cell. Satisfying the camping condition may include satisfying the S criterion for cell camping. In one case, the first terminal device may first determine whether the first cell satisfies the camping conditions. If the first cell satisfies the camping conditions, it does not perform cell selection and directly determines the first cell as the camping cell. In the case where the first cell does not satisfy the camping condition, the first terminal device may perform cell selection. The process of determining whether the first cell meets the residency conditions here does not belong to the cell selection process. In another case, the first terminal device preferentially selects the first cell when performing cell selection.
  • the first terminal device still performs a cell selection after entering the RRC non-connected state, but first determines whether the first cell meets the residency conditions. If the first cell satisfies the camping condition, the camping cell is determined to be the first cell. When the first cell does not meet the camping conditions, the first terminal device then searches for other cells that meet the S criterion and attempts to camp.
  • the above communication method may also include:
  • the first terminal device sends the second information to the network device.
  • the network device receives the second information from the first terminal device.
  • the network device When the terminal device does not support the RRC non-connected state multicast service, the network device sends an RRCRelease message to the terminal device to instruct the terminal device to enter the RRC non-connected state to receive the multicast service due to cell congestion.
  • the terminal device may select a neighbor through the cell.
  • the cell requests to enter the RRC connection state to receive multicast services.
  • the delay in re-establishing the RRC connection is large, which may cause interruption of multicast service reception.
  • the terminal device may also request the network device of the current serving cell to enter the RRC connection state to receive multicast services again.
  • the network device is likely to reject the RRC connection recovery request of the terminal device again, which will cause unnecessary signaling overhead.
  • the first terminal device may send the second information to the network device.
  • the second information is used to indicate that the multicast service is supported in the RRC non-connected state, that is, the first terminal device supports receiving the multicast service in the RRC non-connected state.
  • the first terminal device may report the second information to the network device through the capability information.
  • the first terminal device may send UE Capability Information (UE Capability Information) to the network device, and the UE Capability Information may include or carry the second information.
  • the network device may receive the UE capability information from the first terminal device, and then may obtain the second information from the UE capability information.
  • the first terminal device may also report the second information to the network device through other information, messages or signaling, which is not limited here.
  • the first terminal device may not send the second information to the network device, that is, step 604 may not be performed, thereby avoiding the transmission of unnecessary information and thereby saving money.
  • the network device may send the first information to any terminal device with which the RRC connection is established.
  • the terminal device sends the first information
  • only the terminal device that supports receiving multicast services in the RRC non-connected state sends the second information to the network device.
  • the first terminal device can send the second information to the network device.
  • the network device may send the first information to the first terminal device according to the second information.
  • the network device may send the first information to the first terminal device according to the second information.
  • a terminal device that supports receiving multicast services in an RRC non-connected state sends the second information to the network device
  • a terminal device that does not support receiving multicast services in an RRC non-connected state sends the fifth information to the network device.
  • the fifth information is used to indicate that receiving multicast services in the RRC non-connected state is not supported.
  • the network device may decide which terminal devices to send the first information to based on the second information and the fifth information.
  • the above communication method may also include:
  • the network device sends the first configuration information to the first terminal device.
  • the first terminal device receives the first configuration information from the network device.
  • the first configuration information may be used to configure the first terminal device to receive the multicast service in the RRC non-connected state.
  • the first configuration information may be carried in the RRC reconfiguration message or in other messages or signaling.
  • the network device may request the first terminal device to The first configuration information is sent so that the first terminal device can receive the multicast service according to the first configuration information in the RRC non-connected state.
  • step 603 may be replaced by: the first terminal device receives the multicast service through the first cell in the RRC non-connected state according to the first configuration information.
  • the first configuration information may include multicast MRB configuration, multicast common frequency resource (CFR) configuration, etc.
  • Multicast MRB configuration is used to configure the MRB that carries multicast services
  • CFR configuration is used to configure frequency resources for multicast services.
  • the first configuration information may be configuration information of one or more multicast services.
  • the first configuration information may also be used to configure the terminal device to receive the multicast service in the RRC connected state. That is, the network device can send a set of multicast service configurations for the same multicast service.
  • This set of multicast service configurations can be used in both RRC connected state and RRC non-connected state. That is to say, the RRC connected state and the RRC non-connected state have different configuration information for the same multicast service.
  • the RRC connected state is configuration information 1
  • the RRC non-connected state is configuration information 2.
  • RRC connected state and RRC non-connected state have different configuration information. It can be understood that some multicast configuration parameters are the same and some multicast configuration parameters are different.
  • the first configuration information may include a set of configuration parameters, and the configuration parameters that are different between the RRC non-connected state and the RRC connected state are only part of the configuration parameters in this set of configuration parameters.
  • the network device may send the first configuration information to the first terminal device in the RRC connected state or the RRC non-connected state.
  • the network device may send the first configuration information to the first terminal device in the RRC connected state.
  • the terminal device can obtain the multicast configuration of the RRC non-connected state through dedicated signaling in the RRC connected state. In this way, if the terminal device still resides in the current cell after entering the RRC non-connected state, it does not need to obtain the RRC non-connected state again. Connected multicast configuration can improve the reception efficiency of multicast services.
  • the terminal device can obtain the multicast service in the RRC non-connected state in the RRC connected state.
  • Configuration information so that after the terminal device enters the RRC non-connected state from the RRC connected state, it does not need to obtain the configuration information of the multicast service in the RRC non-connected state again on the serving cell, but uses the RRC non-connected state received in the RRC connected state. to receive the configuration information of the multicast service, thereby improving the continuity of the multicast service.
  • the network device may directly send the first configuration information to the first terminal device.
  • the network device may send the first configuration information to the terminal device according to the second information or the fifth information reported by the terminal device.
  • the network device only sends the first configuration information to the first terminal device when the first terminal device supports receiving the multicast service in the RRC non-connected state, that is, the first terminal device reports the second information, which can avoid sending the first configuration information to the first terminal device.
  • the terminal equipment configured to receive multicast services in RRC non-connected state is used to configure the configuration information for receiving multicast services in RRC non-connected state.
  • the above communication method may also include: the first terminal device obtains system information from the network device, where the system information is system information required for the RRC non-connected state.
  • the first cell needs to perform a system information acquisition process to obtain the system information required by the first terminal equipment in the RRC non-connected state.
  • the terminal equipment enters the RRC non-connected state from the RRC connected state. After performing the cell selection, the system information acquisition process will be executed. Since the first terminal equipment does not perform cell selection, in order to avoid the first terminal equipment being unable to obtain the information for the RRC non-connected state. state, the first terminal device needs to obtain the system message again in the first cell after entering the RRC non-connected state, otherwise the first terminal device cannot correctly perform cell reselection.
  • the system messages related to cell reselection such as SIB2/SIB3/SIB4/SIB5, etc., are not broadcast by the network device before the first terminal device enters the RRC non-connected state, so that the first terminal device does not have the RRC non-connected state required. system information.
  • Figure 7 is a schematic flow chart of another communication method disclosed in an embodiment of the present application. As shown in Figure 7, the communication method may include the following steps.
  • the network device sends the third information to the first terminal device in the RRC connection state.
  • the first terminal device receives the third information from the network device in the RRC connection state.
  • the network device may send the third information to the first terminal device in the RRC connection state.
  • the first terminal device is a terminal device that establishes an RRC connection with the network device, that is, a terminal device that communicates with the network device and is in an RRC connection state.
  • the first terminal device may be any terminal device that establishes an RRC connection with the network device, or may be a terminal device that establishes an RRC connection with the network device and has good coverage.
  • the third information is used to indicate that cell selection is not performed when entering the RRC non-connected state from the RRC connected state.
  • RRC non-connected state can be RRC idle state, It can also be RRC inactive state, RRC idle state and RRC inactive state.
  • the third information may be carried in the RRC release message, the RRC reconfiguration message, or other messages or signaling.
  • the network device may send third information to the first terminal device.
  • the network device may not send the third information to the first terminal device.
  • the third information may be indicated by 1 bit, a flag bit or an indication bit.
  • the RRC release message or the RRC reconfiguration message may include this 1 bit, flag bit or indicator bit.
  • the RRC release message or RRC reconfiguration message does not include this 1 bit, flag bit or indicator bit.
  • the network device may send the third information to the first terminal device.
  • the network device may send the sixth information to the first terminal device.
  • the sixth information is used to indicate entering the RRC non-connected state from the RRC connected state to perform cell selection. That is, the network device may instruct the first terminal device to enter the RRC non-connected state from the RRC connected state to perform cell selection or not to perform cell selection.
  • the third information or the sixth information may be indicated by 1 bit.
  • the value of this bit in the RRC release message or the RRC reconfiguration message is 1, indicating that the network device sends a message to the first terminal device.
  • a third message was sent.
  • the value of this bit in the RRC release message or the RRC reconfiguration message is 0, indicating that the network device sends a message to the first terminal device. The sixth message.
  • the first terminal device enters the RRC non-connected state.
  • the network device When the network device wants to release the first terminal device to the RRC non-connected state, it may send an RRC release message to the first terminal device in the RRC connected state.
  • the first terminal device may receive the RRC release message from the network device in the RRC connected state, and then may enter the RRC non-connected state according to the RRC release message.
  • the network device may first send the third information to the first terminal device, and then may send the RRC release message to the first terminal device.
  • the first terminal device may receive the third information first, and then receive the RRC release message.
  • the first terminal equipment enters the RRC non-connected state from the RRC connected state without performing cell selection.
  • the first terminal device not performing cell selection please refer to the relevant description in step 603, which will not be described again here.
  • the terminal equipment enters the RRC non-connected state from the RRC connected state without performing cell selection.
  • This can avoid the interruption of receiving multicast services when the terminal equipment enters the RRC non-connected state from the RRC connected state and perform cell selection, which can improve the multicast service.
  • Continuity, and at the same time can reduce the energy consumption of searching for cells during the cell selection process, thereby reducing the power consumption of terminal equipment.
  • the communication method corresponding to Figure 7 can be used alone or in combination with the communication method corresponding to Figure 6.
  • the first terminal device determines whether to execute the cell operation based on the third information or the sixth information. selection, rather than determining whether to perform cell selection based on the first information.
  • the first terminal device determines whether to execute the cell operation based on the third information or the sixth information. selection, rather than determining whether to perform cell selection based on the first information.
  • the RRC release message includes the first information and the third information
  • the first terminal device does not perform cell selection; when the RRC release message includes the first information but not the third information, or includes the first information and
  • the first terminal device performs cell selection. It can be seen that when the protocol stipulates that the terminal device does not perform cell selection through the third information indication, if the third information is not received, it means that the cell selection is performed, rather than not performing cell selection based on the first information.
  • Figure 8 is a schematic flow chart of another communication method disclosed in an embodiment of the present application. As shown in Figure 8, the communication method may include the following steps.
  • the network device sends fourth information indicating frequency priority to the first terminal device in the RRC connected state.
  • the first terminal device receives fourth information indicating frequency priority from the network device in the RRC connected state.
  • the network device may send fourth information to the first terminal device in the RRC connected state.
  • the first terminal device may be any terminal device that establishes an RRC connection with the network device, that is, any terminal device that communicates with the network device and is in an RRC connection state.
  • the fourth information is used to indicate frequency priority.
  • the network device may broadcast the fourth information to the first terminal device (for example, the fourth information is included in a system message, or the fourth information is included in an MCCH message), or may be sent to the first terminal device through an RRC release message.
  • Frequency priority is the priority of the frequency.
  • the frequency here is the frequency of the cell.
  • the frequency of the cell is the operating frequency of the cell.
  • the first terminal device selects the resident cells in order of frequency priority from high to low.
  • the network device When the network device wants to release the first terminal device to the RRC non-connected state, it may send an RRC release message to the first terminal device in the RRC connected state.
  • the first terminal device may receive the RRC release message from the network device in the RRC connected state, and then may enter the RRC non-connected state according to the RRC release message.
  • the network device may first send the fourth information to the first terminal device, and then may send the RRC release message to the first terminal device.
  • the first terminal device may receive the fourth information first, and then receive the RRC release message.
  • the first terminal device When the first terminal device enters the RRC non-connected state from the RRC connected state to perform cell selection, it may select the resident cell in order of frequency priority from high to low. Frequencies in frequency priority can be arranged in order from high to low. Therefore, the first terminal device can first determine whether there is a cell that satisfies the S criterion in the cell corresponding to the highest frequency priority. If there is a cell that satisfies the S criterion in the cell corresponding to the highest frequency priority, it can select the cell that satisfies the S criterion.
  • the order in which the first terminal device selects cells may be randomly determined, may be determined based on the distance to the cell, or may be determined by other methods, which are not added here. limited.
  • Frequency priorities may include one or more frequency lists. Frequencies in the same frequency list have the same priority, and frequencies in different frequency lists have different priorities.
  • the frequency priority may include a high-priority frequency list, one or more frequencies located in the frequency list are regarded as high priority, and other frequencies are regarded as low priority.
  • the frequency priority may include a high-priority frequency list and a low-priority frequency list.
  • the high-priority frequency list may be: ⁇ frequency 1, frequency 2 ⁇ , and the terminal device may preferentially select cells corresponding to frequency 1 and frequency 2 when performing cell selection.
  • the frequency priority may include a high priority frequency list, a medium priority list and a low priority frequency list.
  • the first terminal device may select according to a high-priority frequency list, a medium-priority frequency list, and a low-priority frequency list.
  • the frequency priority may include M frequency lists, respectively 1, 2, ..., M. The higher the number, the higher the priority, or the higher the number, the lower the priority. M is an integer greater than or equal to 1. When M is greater than 1, network equipment can use Bits indicate these M priorities.
  • Frequency priorities can also include a list of frequencies. Different frequencies in the frequency list can correspond to different priorities, or they can correspond to the same priority. An example of this frequency list can be shown in Table 1 and Table 2:
  • N, A, and B are integers greater than or equal to 1.
  • the communication method corresponding to Figure 8 can be used alone or in combination with the communication method corresponding to Figure 6 and/or Figure 7.
  • the priority of the frequency corresponding to the first cell in the frequency priority can be the highest priority, which is conducive to the first terminal device preferentially selecting the first cell, which can avoid multicast service interruption and reduce the number of first cells. Energy consumption of terminal equipment.
  • the network device can concentrate the terminal devices that receive multicast in the RRC non-connection state to a specific frequency, such as a frequency/cell that can provide RRC non-connection state multicast services. On the one hand, it can avoid the situation where the terminal equipment selects a cell that does not support the RRC non-connection multicast service and causes multicast interruption.
  • Cells that do not support the RRC non-connected state multicast service may include cells that support the multicast service but only support providing the multicast service in the RRC connected state, or may include cells that cannot provide the multicast service.
  • the terminal device After camping in the cell, the terminal device needs to trigger a request to establish an RRC connection to enter the RRC connection state to receive multicast services, which will cause the interruption of the multicast service; in the latter case, the terminal device also needs to trigger the request after camping in the cell. It is necessary to trigger a request to establish an RRC connection. After entering the RRC connection state, the terminal device can trigger the establishment of a unicast PDU session with the multicast server to receive multicast services. On the other hand, one can avoid terminal The device performs blind cell selection, thereby reducing the power consumption overhead of the terminal device. On the other hand, from a network perspective, it is also beneficial to saving network power consumption and saving resource overhead and signaling overhead for the network to provide RRC non-connection multicast services. For example, the network can only provide RRC non-connection multicast services on specific frequencies/cells, and does not need to provide RRC non-connection multicast services on other cells.
  • the network device can determine the priority of the frequency corresponding to the cell that meets the demand as a higher priority based on the corresponding demand.
  • the functions performed by the network device in the above communication method can also be performed by modules (for example, chips) in the network device, or by logic modules or software that can realize all or part of the functions of the network device.
  • the functions performed by the terminal device can also be performed by modules (eg, chips) in the terminal device, or by logic modules or software that can realize all or part of the functions of the terminal device.
  • Figure 9 is a schematic structural diagram of a communication device disclosed in an embodiment of the present application. As shown in Figure 9, the communication device may have a processing unit 901 and a transceiver unit 902.
  • the communication device may be a terminal device, a chip, a chip system, or a processor that supports the terminal device to implement the method, or a logic module or software that can realize all or part of the functions of the terminal device.
  • the processing unit 901 and transceiver unit 902 please refer to the description of the seventh aspect in the Summary of the Invention. A more detailed description of the processing unit 901 and the transceiver unit 902 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiments shown in FIGS. 6 to 8 , and will not be described again here.
  • the communication device may be a network device, a chip, a chip system, or a processor that supports the network device to implement the method, or a logic module that can realize all or part of the network device functions.
  • software for detailed description of the above processing unit 901 and transceiver unit 902, please refer to the description of the eighth aspect in the Summary of the Invention. A more detailed description of the processing unit 901 and the transceiver unit 902 can be obtained directly by referring to the relevant descriptions of the network devices in the method embodiments shown in FIGS. 6 to 8 , and will not be described again here.
  • the communication device may be a terminal device, a chip, a chip system, or a processor that supports the terminal device to implement the method, or a logic module or logic module that can realize all or part of the functions of the terminal device.
  • software for detailed description of the above processing unit 901 and transceiver unit 902, please refer to the description of the ninth aspect in the Summary of the Invention. A more detailed description of the processing unit 901 and the transceiver unit 902 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 7 , and will not be described again here.
  • the communication device may be a network device, a chip, a chip system, or a processor that supports the network device to implement the method, or a logic module or logic module that can realize all or part of the network device functions.
  • software for detailed description of the above processing unit 901 and transceiver unit 902, please refer to the description of the tenth aspect in the Summary of the Invention. A more detailed description of the processing unit 901 and the transceiver unit 902 can be obtained directly by referring to the relevant description of the network device in the method embodiment shown in FIG. 7 , and will not be described again here.
  • the communication device may be a terminal device, a chip, a chip system, or a processor that supports the terminal device to implement the method, or a logic module or logic module that can realize all or part of the functions of the terminal device.
  • software for detailed description of the above processing unit 901 and transceiver unit 902, please refer to the description of the eleventh aspect in the Summary of the Invention. A more detailed description of the processing unit 901 and the transceiver unit 902 can be obtained directly by referring to the relevant description of the first terminal device in the method embodiment shown in FIG. 8 , and will not be described again here.
  • the communication device may be a network device, a chip, a chip system, or a processor that supports the network device to implement the method, or a logic module or logic module that can realize all or part of the network device functions.
  • software for detailed description of the above processing unit 901 and transceiver unit 902, please refer to the description of the twelfth aspect in the Summary of the Invention. A more detailed description of the processing unit 901 and the transceiver unit 902 can be obtained directly by referring to the relevant description of the network device in the method embodiment shown in FIG. 8 , and will not be described again here.
  • the communication device may include a processor 1001, a memory 1002, a transceiver 1003 and a bus 1004.
  • the memory 1002 may exist independently and may be connected to the processor 1001 through the bus 1004.
  • Memory 1002 may also be integrated with processor 1001.
  • bus 1004 is used to realize the connection between these components.
  • the transceiver 1003 may include a transmitter 10031, a receiver 10032, and an antenna 10033.
  • transceiver 1003 may include a transmitter (i.e., an output interface) and a receiver (i.e., an input interface).
  • a transmitter may include a transmitter and an antenna, and a receiver may include a receiver and an antenna.
  • the communication device may be a terminal device or a module in the terminal device.
  • the processor 1001 is used to perform the operations performed by the processing unit 901 in the above embodiment
  • the transceiver 1003 is used to perform the operations performed by the transceiver unit 902 in the above embodiment.
  • the above communication device can also be used to perform various methods performed by the first terminal device in the above method embodiments in Figures 6 to 8, which will not be described again.
  • the communication device may be a network device or a module in the network device.
  • the computer program instructions stored in memory 1002 are executed When running, the processor 1001 is used to perform the operations performed by the processing unit 901 in the above embodiment, and the transceiver 1003 is used to perform the operations performed by the transceiver unit 902 in the above embodiment.
  • the above communication device can also be used to perform various methods performed by the network device in the above method embodiments of Figures 6 to 8, which will not be described again.
  • FIG. 11 is a schematic structural diagram of yet another communication device disclosed in an embodiment of the present application.
  • the communication device may include an input interface 1101 , a logic circuit 1102 and an output interface 1103 .
  • the input interface 1101 and the output interface 1103 are connected through a logic circuit 1102.
  • the input interface 1101 is used to receive information from other communication devices
  • the output interface 1103 is used to output, schedule or send information to other communication devices.
  • the logic circuit 1102 is used to perform operations other than the operations of the input interface 1101 and the output interface 1103, for example, to implement the functions implemented by the processor 1001 in the above embodiment.
  • the communication device may be a terminal device (or a module within the terminal device) or a network device (or a module within the network device).
  • a more detailed description of the input interface 1101, the logic circuit 1102 and the output interface 1103 can be obtained directly by referring to the relevant descriptions of the first terminal device and the network device in the above method embodiment, and will not be described again here.
  • An embodiment of the present application also discloses a computer-readable storage medium on which instructions are stored. When the instructions are executed, the method in the above method embodiment is executed.
  • An embodiment of the present application also discloses a computer program product including instructions that, when executed, perform the method in the above method embodiment.
  • the embodiment of the present application also discloses a communication system, which may include a network device and a terminal device.
  • a communication system which may include a network device and a terminal device.

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Abstract

本申请实施例公开一种通信方法及装置，该方法包括：网络设备向处于RRC连接态的终端设备发送指示终端设备在RRC非连接态接收组播业务的第一信息，终端设备进入RRC非连接态，并在RRC非连接态通过终端设备在RRC连接态的服务小区接收组播业务，可以避免由于RRC状态的变化导致服务小区变换引起组播业务中断的情况，从而可以提高组播业务的连续性。

Description

一种通信方法及装置
本申请要求于2022年07月28日提交中国专利局、申请号为202210899957.9、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
本申请实施例涉及通信技术领域，尤其涉及一种通信方法及装置。
背景技术
在第三代合作伙伴(3rd generation partnership project，3GPP)标准版本(release，Rel)-17中，仅支持终端设备在无线资源控制(radio resource control，RRC)连接态接收组播广播业务(multicast broadcast service，MBS)组播业务。然而，当一个小区内接收MBS组播业务的终端设备数量过多时，处于RRC连接态的终端设备数量可能超出小区能够容纳的RRC连接态的终端设备数量。因此，为了缓解网络拥塞，在Rel-18中提出支持终端设备在RRC非连接态接收MBS组播业务，但需要终端设备由RRC连接态进入RRC非连接态。
终端设备由RRC连接态进入RRC非连接态需要执行小区选择，在终端设备选择到其他满足小区驻留准则的小区的情况下，需要重新获取该小区的组播业务配置信息再根据该小区的组播业务配置接收组播业务。然而，重新获取小区的组播业务配置再接收组播业务会导致组播业务出现中断，以致影响组播业务的连续性。
发明内容
本申请实施例公开了一种通信方法及装置，用于提高组播业务的连续性。
第一方面，本申请公开了一种通信方法，该通信方法可以应用于终端设备，也可以应用于终端设备中的模块(例如，芯片)，还可以应用于能实现全部或部分终端设备功能的逻辑模块或软件。下面以应用于终端设备为例进行描述。该通信方法可以包括：在RRC连接态接收来自网络设备的第一信息，第一信息指示终端设备在RRC非连接态接收组播业务；进入RRC非连接态；在RRC非连接态通过第一小区接收组播业务，第一小区为终端设备在RRC连接态的服务小区。
本申请实施例中，终端设备接收到来自网络设备指示终端设备在RRC非连接态接收组播业务的第一信息之后，在终端设备从RRC连接态进入RRC非连接态之后，终端设备在RRC非连接态通过在RRC连接态的服务小区接收组播业务，可以避免由于RRC状态的变化导致服务小区变换引起组播业务中断的情况，从而可以提高组播业务的连续性。
作为一种可能的实施方式，终端设备由RRC连接态进入RRC非连接态不执行小区选择。
本申请实施例中，终端设备由RRC连接态进入RRC非连接态不执行小区选择，可以避免终端设备进行小区选择过程，可以减小终端设备的处理过程，从而可以降低终端设备的功耗。
作为一种可能的实施方式，终端设备不执行小区选择可以包括：在第一小区满足驻留条件的情况下，终端设备的驻留小区为第一小区。
本申请实施例中，在第一小区满足驻留条件的情况下，终端设备的驻留小区为第一小区，可以保证终端设备驻留在信号质量较好的第一小区接收组播业务，满足组播业务的服务质量要求，可以避免终端设备在服务小区覆盖较好的情况下选择到其他小区，导致组播业务的中断；也可以避免不必要的小区选择过程，从而降低终端设备的功耗。
作为一种可能的实施方式，第一信息携带在RRC释放消息中，终端设备进入RRC非连接态可以包括：根据RRC释放消息进入RRC非连接态。
本申请实施例中，第一信息携带在RRC释放消息中进行传输，可以避免通过专门的消息或信令传输第一信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。此外，第一信息携带在RRC释放消息中，当网络发生拥塞时(例如在小区内RRC连接态的组播终端设备数量大于预设的阈值，或小区的RRC连接终端设备数量大于预设的阈值)，网络设备通过RRC释放消息指示 终端设备进入RRC非连接态，且同时指示终端设备进入RRC非连接态的目的是要在RRC非连接态接收组播业务，因此可以提高组播业务的接收效率，且与现有协议更加兼容。
作为一种可能的实施方式，第一信息可以指示该组播业务的标识，或MBS无线承载(MBS radio bearer，MRB)的标识，该MRB为该组播业务关联的MRB。
本申请实施例中，终端设备可以通过第一信息指示上述组播业务的标识或上述组播业务关联的MRB的标识来接收具体的某个或某些组播业务，可以避免终端设备接收所有组播业务，可以减少终端设备接收组播业务的数量，从而可以降低终端设备的功耗。
作为一种可能的实施方式，该通信方法还可以包括：接收来自网络设备的第一配置信息，第一配置信息用于配置终端设备在RRC非连接态接收组播业务；终端设备在RRC非连接态通过第一小区接收组播业务可以包括：根据第一配置信息在RRC非连接态通过第一小区接收组播业务。
本申请实施例中，终端设备可以在RRC连接态通过第一小区接收到来自网络设备的RRC非连接态的组播配置，在进入RRC非连接态之后通过第一小区接收组播业务，不需要重新获取组播配置，可以提高组播业务的接收效率。特别是，终端设备在RRC连接态已经接收组播业务的情况下，终端设备可以避免由于重新获取组播配置导致组播业务中断的情况，从而可以提高组播业务的连续性。
作为一种可能的实施方式，第一配置信息还用于配置终端设备在RRC连接态接收组播业务。
本申请实施例中，一个配置信息不仅可以用于终端设备在RRC非连接态接收组播业务，还可以用于终端设备在RRC连接态接收组播业务，可以避免针对RRC非连接态和RRC连接态分别配置一个配置信息的情况，从而可以提高配置信息的利用率。此外，还可以减少传输配置信息的次数，可以减少信息传输的次数，从而可以节约传输资源。
作为一种可能的实施方式，第一配置信息携带在RRC重配置消息中。
本申请实施例中，第一配置信息携带在RRC重配置消息中进行传输，可以避免通过专门的消息或信令传输第一配置信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
作为一种可能的实施方式，该通信方法还可以包括：向网络设备发送第二信息，第二信息用于指示支持在RRC非连接态接收组播业务。
本申请实施例中，在终端设备支持在RRC非连接态接收组播业务的情况下，终端设备可以向网络设备上报终端设备的能力，以便网络设备可以根据终端设备上报的能力向终端设备发送第一信息，可以避免终端设备不支持RRC非连接态接收组播业务而网络设备向终端设备发送第一信息的情况。
作为一种可能的实施方式，该通信方法还可以包括：获取来自网络设备的***信息，***信息为RRC非连接态所需的***信息。
本申请实施例中，终端设备进入RRC非连接态后获取***信息，可以避免终端设备由于漏收用于RRC非连接态的***消息，而无法正确进行小区重选的情况。
作为一种可能的实施方式，RRC非连接态可以包括RRC空闲态和/或RRC非活动态。
作为一种可能的实施方式，该通信方法可以还包括：接收来自网络设备的第三信息，第三信息用于指示由RRC连接态进入RRC非连接态不执行小区选择。
本申请实施例中，终端设备接收到来自网络设备指示由RRC连接态进入RRC非连接态不执行小区选择的第三信息之后，在进入RRC非连接态后不执行小区选择，可以避免终端设备进行小区选择及后续过程，从而可以降低终端设备功耗以及提高组播业务的连续性。
作为一种可能的实施方式，第三信息携带在RRC释放消息或RRC重配置消息中。
本申请实施例中，第三信息携带在RRC释放消息或RRC重配置消息中进行传输，可以避免通过专门的消息或信令传输第三信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
作为一种可能的实施方式，该通信方法还可以包括：接收来自网络设备的第四信息，第四信息用于指示频率优先级；在执行小区选择时，按照频率优先级从高到低的顺序选择驻留小区。
本申请实施例中，终端设备接收到来自网络设备指示频率优先级的第四信息之后，在执行小区选择时，可以按照频率优先级从高到低的顺序选择驻留小区。此外，在第一小区所在的频率为最高优先级的频率的情况下，终端设备可以优先选择第一小区，可以避免组播业务中断以及降低终端设备的功耗。
作为一种可能的实施方式，第四信息携带在***消息或RRC释放消息中。
本申请实施例中，第四信息携带在***消息或RRC释放消息中进行传输，可以避免通过专门的消息或 信令传输第四信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
第二方面，本申请公开了一种通信方法，该通信方法可以应用于网络设备，也可以应用于网络设备中的模块(例如，芯片)，还可以应用于能实现全部或部分网络设备功能的逻辑模块或软件。下面以应用于网络设备为例进行描述。该通信方法可以包括：向处于RRC连接态的终端设备发送第一信息，第一信息指示终端设备在RRC非连接态接收组播业务，第一信息用于终端设备在RRC非连接态通过第一小区接收组播业务，第一小区为终端设备在RRC连接态的驻留小区。
本申请实施例中，网络设备向终端设备发送指示终端设备在RRC非连接态接收组播业务的第一信息，以便终端设备在从RRC连接态进入RRC非连接态之后，在RRC非连接态通过在RRC连接态的服务小区接收组播业务，可以避免终端设备由于RRC状态的改变导致服务小区变换引起组播业务中断的情况，从而可以提高组播业务的连续性。
作为一种可能的实施方式，第一信息还用于终端设备由RRC连接态进入RRC非连接态不执行小区选择。
本申请实施例中，第一信息可以使终端设备由RRC连接态进入RRC非连接态不执行小区选择，可以避免终端设备进行小区选择过程，可以减小终端设备的处理过程，从而可以降低终端设备的功耗。
作为一种可能的实施方式，终端设备不执行小区选择包括：在第一小区满足驻留条件的情况下，驻留小区为第一小区。
本申请实施例中，在第一小区满足驻留条件的情况下，终端设备的驻留小区为第一小区，可以保证终端设备驻留在信号质量较好的第一小区接收组播业务，满足组播业务的服务质量要求，可以避免终端设备在服务小区覆盖较好的情况下选择到其他小区，导致组播业务的中断；也可以避免不必要的小区选择过程，从而可以降低终端设备的功耗。
作为一种可能的实施方式，第一信息携带在RRC释放消息中，RRC释放消息用于终端设备进入RRC非连接态。
本申请实施例中，第一信息携带在RRC释放消息中进行传输，可以避免通过专门的消息或信令传输第一信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。此外，第一信息携带在RRC释放消息中，当网络发生拥塞时(例如在小区内RRC连接态的组播终端设备数量大于预设的阈值，或小区的RRC连接终端设备数量大于预设的阈值)，网络设备通过RRC释放消息指示终端设备进入RRC非连接态，且同时指示终端设备进入RRC非连接态的目的是要在RRC非连接态接收组播业务，因此可以提高组播业务的接收效率，且与现有协议更加兼容。
作为一种可能的实施方式，第一信息可以指示该组播业务的标识，或MRB的标识，该MRB为该组播业务关联的MRB。
本申请实施例中，网络设备可以通过在第一信息指示上述组播业务的标识或上述组播业务关联的MRB的标识，使终端设备来接收具体的某个或某些组播业务，可以避免终端设备接收所有组播业务，可以减少终端设备接收组播业务的数量，从而可以降低终端设备的功耗。
作为一种可能的实施方式，该通信方法还可以包括：向终端设备发送第一配置信息，第一配置信息用于配置终端设备在RRC非连接态接收组播业务。
本申请实施例中，网络设备可以通过第一小区向处于RRC连接态的终端设备配置RRC非连接态的组播配置，以便终端设备进入RRC非连接态之后可以根据该配置信息通过第一小区接收组播业务，不需要重新获取组播配置，可以提高组播业务的接收效率。特别是，终端设备在RRC连接态已经接收组播业务的情况下，终端设备可以避免由于重新获取组播配置导致组播业务中断的情况，从而可以提高组播业务的连续性。
作为一种可能的实施方式，第一配置信息还用于配置终端设备在RRC连接态接收组播业务。
本申请实施例中，一个配置信息不仅可以配置终端设备在RRC非连接态接收组播业务，还可以配置终端设备在RRC连接态接收组播业务，可以避免针对RRC非连接态和RRC连接态分别配置一个配置信息的情况，从而可以提高配置信息的利用率。此外，还可以减少传输配置信息的次数，可以减少信息传输的次数，从而可以节约传输资源。
作为一种可能的实施方式，第一配置信息携带在RRC重配置消息中。
本申请实施例中，第一配置信息携带在RRC重配置消息中进行传输，可以避免通过专门的消息或信令传输第一配置信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
作为一种可能的实施方式，该通信方法还可以包括：接收来自终端设备的第二信息，第二信息用于指示支持在RRC非连接态接收组播业务。
本申请实施例中，网络设备接收到终端设备上报的能力之后，可以根据终端设备的能力向终端设备发送第一信息，可以避免终端设备不支持RRC非连接态接收组播业务而网络设备向终端设备发送第一信息的情况。
作为一种可能的实施方式，该通信方法还可以包括：向终端设备发送***信息，***信息为RRC非连接态所需的***信息。
本申请实施例中，网络设备向终端设备发送用于RRC非连接态的***消息，可以避免终端设备由于漏收用于RRC非连接态的***消息，而无法正确进行小区重选的情况。
作为一种可能的实施方式，RRC非连接态可以包括RRC空闲态和/或RRC非活动态。
作为一种可能的实施方式，该通信方法还可以包括：向终端设备发送第三信息，第三信息用于指示由RRC连接态进入RRC非连接态不执行小区选择。
本申请实施例中，网络设备向终端设备发送指示由RRC连接态进入RRC非连接态不执行小区选择的第三信息，以便终端设备在进入RRC非连接态后不执行小区选择，可以避免终端设备进行小区选择及后续过程，从而可以降低终端设备功耗以及提高组播业务的连续性。
作为一种可能的实施方式，第三信息携带在RRC释放消息或RRC重配置消息中。
本申请实施例中，第三信息携带在RRC释放消息或RRC重配置消息中进行传输，可以避免通过专门的消息或信令传输第三信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
作为一种可能的实施方式，该通信方法还可以包括：向处于RRC连接态的终端设备发送第四信息，第四信息用于指示频率优先级，频率优先级用于终端设备在执行小区选择时按照频率优先级从高到低的顺序选择驻留小区。
本申请实施例中，网络设备向终端设备发送指示频率优先级的第四信息，以便终端设备在执行小区选择时按照频率优先级从高到低的顺序选择驻留小区。此外，网络设备可以指示第一小区所在的频率为最高优先级的频率，以便终端设备在执行小区选择时可以优先选择第一小区，可以避免组播业务中断以及降低终端设备功耗。
作为一种可能的实施方式，第四信息携带在***消息或RRC释放消息中。
本申请实施例中，第四信息携带在***消息或RRC释放消息中进行传输，可以避免通过专门的消息或信令传输第四信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
第三方面，本申请公开了一种通信方法，该通信方法可以应用于终端设备，也可以应用于终端设备中的模块(例如，芯片)，还可以应用于能实现全部或部分终端设备功能的逻辑模块或软件。下面以应用于终端设备为例进行描述。该通信方法可以包括：在RRC连接态接收来自网络设备的第三信息，第三信息用于指示由RRC连接态进入RRC非连接态不执行小区选择；进入RRC非连接态，终端设备由RRC连接态进入RRC非连接态不执行小区选择。
本申请实施例中，终端设备接收到来自网络设备指示由RRC连接态进入RRC非连接态不执行小区选择的第三信息之后，由RRC连接态进入RRC非连接态不执行小区选择，可以避免由于RRC状态的变化导致服务小区变换引起组播业务中断的情况，从而可以提高组播业务的连续性。此外，可以避免终端设备进行小区选择过程，可以减小终端设备的处理过程，从而可以降低终端设备的功耗。
作为一种可能的实施方式，终端设备不执行小区选择可以包括：
在第一小区满足驻留条件的情况下，驻留小区为第一小区，第一小区为终端设备在RRC连接态的服务小区。
本申请实施例中，在第一小区满足驻留条件的情况下，终端设备的驻留小区为第一小区，可以保证终端设备驻留在信号质量较好的第一小区接收组播业务，满足组播业务的服务质量要求，可以避免终端设备在服务小区覆盖较好的情况下选择到其他小区，导致组播业务的中断；也可以避免不必要的小区选择过程，从而可以降低终端设备的功耗。
作为一种可能的实施方式，第三信息携带在RRC释放消息或RRC重配置消息中。
本申请实施例中，第三信息携带在RRC释放消息或RRC重配置消息中进行传输，可以避免通过专门的 消息或信令传输第三信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
作为一种可能的实施方式，RRC非连接态可以包括RRC空闲态和/或RRC非活动态。
第四方面，本申请公开了一种通信方法，该通信方法可以应用于网络设备，也可以应用于网络设备中的模块(例如，芯片)，还可以应用于能实现全部或部分网络设备功能的逻辑模块或软件。下面以应用于网络设备为例进行描述。该通信方法可以包括：向处于RRC连接态的终端设备发送第三信息，第三信息用于指示终端设备由RRC连接态进入RRC非连接不执行小区选择。
本申请实施例中，网络设备向终端设备发送指示由RRC连接态进入RRC非连接不执行小区选择的第三信息，以便终端设备由RRC连接态进入RRC非连接态不执行小区选择，可以避免由于RRC状态的变化导致服务小区变换引起组播业务中断的情况，从而可以提高组播业务的连续性。此外，还可以避免终端设备进行小区选择过程，可以减小终端设备的处理过程，从而可以降低终端设备的功耗。
作为一种可能的实施方式，终端设备不执行小区选择可以包括：在第一小区满足驻留条件的情况下，驻留小区为第一小区，第一小区为终端设备在RRC连接态前的服务小区。
本申请实施例中，在第一小区满足驻留条件的情况下，终端设备的驻留小区为第一小区，可以保证终端设备驻留在信号质量较好的第一小区接收组播业务，满足组播业务的服务质量要求，可以避免终端设备在服务小区覆盖较好的情况下选择到其他小区，导致组播业务的中断；也可以避免不必要的小区选择过程，从而可以降低终端设备的功耗。
作为一种可能的实施方式，第三信息携带在RRC释放消息或RRC重配置消息中。
本申请实施例中，第三信息携带在RRC释放消息或RRC重配置消息中进行传输，可以避免通过专门的消息或信令传输第三信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
作为一种可能的实施方式，RRC非连接态可以包括RRC空闲态和/或RRC非活动态。
第五方面，本申请公开了一种通信方法，该通信方法可以应用于终端设备，也可以应用于终端设备中的模块(例如，芯片)，还可以应用于能实现全部或部分终端设备功能的逻辑模块或软件。下面以应用于终端设备为例进行描述。该通信方法可以包括：在RRC连接态接收来自网络设备的第四信息，第四信息用于指示频率优先级；在执行小区选择时，按照频率优先级从高到低的顺序选择驻留小区。
本申请实施例中，终端设备接收到来自网络设备指示频率优先级的第四信息之后，在执行小区选择时，可以按照频率优先级从高到低的顺序选择驻留小区。此外，在终端设备在RRC连接态的服务小区所在的频率为最高优先级的频率的情况下，终端设备可以优先选择该小区，可以避免由于RRC的变化导致服务小区变换引起组播业务中断的情况，从而可以提高组播业务的连续性。
作为一种可能的实施方式，第四信息携带在***消息或RRC释放消息中。
本申请实施例中，第四信息携带在***消息或RRC释放消息中进行传输，可以避免通过专门的消息或信令传输第四信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协议的兼容性。
第六方面，本申请公开了一种通信方法，该通信方法可以应用于网络设备，也可以应用于网络设备中的模块(例如，芯片)，还可以应用于能实现全部或部分网络设备功能的逻辑模块或软件。下面以应用于网络设备为例进行描述。该通信方法可以包括：向处于RRC连接态的终端设备发送第四信息，第四信息用于指示频率优先级，频率优先级用于终端设备在执行小区选择时按照频率优先级从高到低的顺序选择驻留小区。
本申请实施例中，网络设备向处于RRC连接态的终端设备发送指示频率优先级的第四信息，以便终端设备在执行小区选择时按照频率优先级从高到低的顺序选择驻留小区。此外，网络设备可以指示终端设备在RRC连接态的服务小区所在的频率为最高优先级的频率，以便终端设备在执行小区选择时可以优先选择该小区，可以避免组播业务中断以及降低终端设备功耗。
作为一种可能的实施方式，第四信息携带在***消息或RRC释放消息中。
本申请实施例中，第四信息携带在***消息或RRC释放消息中进行传输，可以避免通过专门的消息或信令传输第四信息，可以减少传输的消息或信令的数量，从而可以节约传输资源，同时可以提高与现有协 议的兼容性。
第七方面，本申请公开了一种通信装置，该通信装置可以应用于终端设备，也可以应用于终端设备中的模块(例如，芯片)，还可以应用于能实现全部或部分终端设备功能的逻辑模块或软件。该通信装置可以包括：
收发单元，用于在RRC连接态接收来自网络设备的第一信息，第一信息指示终端设备在RRC非连接态接收组播业务；
处理单元，用于进入RRC非连接态；
处理单元，还用于在RRC非连接态通过第一小区接收组播业务，第一小区为终端设备在RRC连接态的服务小区。
作为一种可能的实施方式，终端设备由RRC连接态进入RRC非连接态不执行小区选择。
作为一种可能的实施方式，终端设备不执行小区选择可以包括：在第一小区满足驻留条件的情况下，终端设备的驻留小区为第一小区。
作为一种可能的实施方式，第一信息携带在RRC释放消息中，处理单元进入RRC非连接态可以包括：
根据RRC释放消息进入RRC非连接态。
作为一种可能的实施方式，第一信息可以指示该组播业务的标识，或MRB的标识，该MRB为该组播业务关联的MRB。
作为一种可能的实施方式，收发单元，还用于接收来自网络设备的第一配置信息，第一配置信息用于配置终端设备在RRC非连接态接收组播业务；
处理单元在RRC非连接态通过第一小区接收组播业务可以包括：
根据第一配置信息在RRC非连接态通过第一小区接收组播业务。
作为一种可能的实施方式，第一配置信息还用于配置终端设备在RRC连接态接收组播业务。
作为一种可能的实施方式，第一配置信息携带在RRC重配置消息中。
作为一种可能的实施方式，收发单元，还用于向网络设备发送第二信息，第二信息用于指示支持在RRC非连接态接收组播业务。
作为一种可能的实施方式，收发单元，还用于获取来自网络设备的***信息，***信息为RRC非连接态所需的***信息。
作为一种可能的实施方式，RRC非连接态可以包括RRC空闲态和/或RRC非活动态。
作为一种可能的实施方式，收发单元，还用于接收来自网络设备的第三信息，第三信息用于指示由RRC连接态进入RRC非连接态不执行小区选择。
作为一种可能的实施方式，第三信息携带在RRC释放消息或RRC重配置消息中。
作为一种可能的实施方式，收发单元，还用于接收来自网络设备的第四信息，第四信息用于指示频率优先级；
处理单元，还用于在执行小区选择时，按照频率优先级从高到低的顺序选择驻留小区。
作为一种可能的实施方式，第四信息携带在***消息或RRC释放消息中。
第八方面，本申请公开了一种通信装置，该通信装置可以应用于网络设备，也可以应用于网络设备中的模块(例如，芯片)，还可以应用于能实现全部或部分网络设备功能的逻辑模块或软件。该通信装置可以包括处理单元和收发单元，其中：
收发单元，用于在处理单元的控制下向处于RRC连接态的终端设备发送第一信息，第一信息指示终端设备在RRC非连接态接收组播业务，第一信息用于终端设备在RRC非连接态通过第一小区接收组播业务，第一小区为终端设备在RRC连接态的驻留小区。
作为一种可能的实施方式，第一信息还用于终端设备由RRC连接态进入RRC非连接态不执行小区选择。
作为一种可能的实施方式，终端设备不执行小区选择可以包括：在第一小区满足驻留条件的情况下，驻留小区为第一小区。
作为一种可能的实施方式，第一信息携带在RRC释放消息中，RRC释放消息用于终端设备进入RRC非连接态。
作为一种可能的实施方式，第一信息可以指示该组播业务的标识，或MRB的标识，该MRB为该组播业务关联的MRB。
作为一种可能的实施方式，收发单元，还用于在处理单元的控制下向终端设备发送第一配置信息，第一配置信息用于配置终端设备在RRC非连接态接收组播业务。
作为一种可能的实施方式，第一配置信息还用于配置终端设备在RRC连接态接收组播业务。
作为一种可能的实施方式，第一配置信息携带在RRC重配置消息中。
作为一种可能的实施方式，收发单元，还用于在处理单元的控制下接收来自终端设备的第二信息，第二信息用于指示支持在RRC非连接态接收组播业务。
作为一种可能的实施方式，收发单元，还用于在处理单元的控制下向终端设备发送***信息，***信息为RRC非连接态所需的***信息。
作为一种可能的实施方式，RRC非连接态可以包括RRC空闲态和/或RRC非活动态。
作为一种可能的实施方式，收发单元，还用于在处理单元的控制下向终端设备发送第三信息，第三信息用于指示由RRC连接态进入RRC非连接态不执行小区选择。
作为一种可能的实施方式，第三信息携带在RRC释放消息或RRC重配置消息中。
作为一种可能的实施方式，收发单元，还用于在处理单元的控制下向处于RRC连接态的终端设备发送第四信息，第四信息用于指示频率优先级，频率优先级用于终端设备在执行小区选择时按照频率优先级从高到低的顺序选择驻留小区。
作为一种可能的实施方式，第四信息携带在***消息或RRC释放消息中。
第九方面，本申请公开了一种通信装置，该通信装置可以应用于终端设备，也可以应用于终端设备中的模块(例如，芯片)，还可以应用于能实现全部或部分终端设备功能的逻辑模块或软件。该通信装置可以包括：
收发单元，用于在RRC连接态接收来自网络设备的第三信息，第三信息用于指示由RRC连接态进入RRC非连接态不执行小区选择；
处理单元，用于进入RRC非连接态，终端设备由RRC连接态进入RRC非连接态不执行小区选择。
作为一种可能的实施方式，终端设备不执行小区选择可以包括：
在第一小区满足驻留条件的情况下，驻留小区为第一小区，第一小区为终端设备在RRC连接态的服务小区。
作为一种可能的实施方式，第三信息携带在RRC释放消息或RRC重配置消息中。
作为一种可能的实施方式，RRC非连接态可以包括RRC空闲态和/或RRC非活动态。
第十方面，本申请公开了一种通信装置，该通信装置可以应用于网络设备，也可以应用于网络设备中的模块(例如，芯片)，还可以应用于能实现全部或部分网络设备功能的逻辑模块或软件。该通信装置可以包括处理单元和收发单元，其中：
收发单元，用于在处理单元的控制下向处于RRC连接态的终端设备发送第三信息，第三信息用于指示终端设备由RRC连接态进入RRC非连接不执行小区选择。
作为一种可能的实施方式，终端设备不执行小区选择可以包括：在第一小区满足驻留条件的情况下，驻留小区为所述第一小区，第一小区为终端设备在RRC连接态前的服务小区。
作为一种可能的实施方式，第三信息携带在RRC释放消息或RRC重配置消息中。
作为一种可能的实施方式，RRC非连接态可以包括RRC空闲态和/或RRC非活动态。
第十一方面，本申请公开了一种通信装置，该通信装置可以应用于终端设备，也可以应用于终端设备中的模块(例如，芯片)，还可以应用于能实现全部或部分终端设备功能的逻辑模块或软件。该通信装置可以包括：
收发单元，用于在RRC连接态接收来自网络设备的第四信息，第四信息用于指示频率优先级；
处理单元，用于在执行小区选择时，按照频率优先级从高到低的顺序选择驻留小区。
作为一种可能的实施方式，第四信息携带在***消息或RRC释放消息中。
第十二方面，本申请公开了一种通信装置，该通信装置可以应用于网络设备，也可以应用于网络设备中的模块(例如，芯片)，还可以应用于能实现全部或部分网络设备功能的逻辑模块或软件。该通信装置可以包括处理单元和收发单元，其中：
收发单元，用于在处理单元的控制下向终端设备发送第四信息，第四信息用于指示频率优先级，频率优先级用于终端设备在执行小区选择时按照频率优先级从高到低的顺序选择驻留小区。
作为一种可能的实施方式，第四信息携带在***消息或RRC释放消息中。
第十三方面，本申请公开了一种通信装置，该通信装置可以为上述方法实施例中的终端设备(或网络设备)，或者为设置在终端设备(或网络设备)中的芯片或处理器。该通信装置包括处理器，处理器与存储器耦合，存储器用于存储程序或指令，当程序或指令被处理器执行时，使通信装置执行上述方法实施例中由终端设备(或网络设备)、或终端设备(或网络设备)中的芯片或处理器所执行的方法。
第十四方面，本申请公开了一种通信装置，该通信装置可以为上述方法实施例中的终端设备(或网络设备)，或者为设置在终端设备(或网络设备)中的芯片。该通信装置包括处理器和存储器，存储器用于存储程序或指令，当程序或指令被处理器执行时，使通信装置执行上述方法实施例中由终端设备(或网络设备)、或终端设备(或网络设备)中的芯片或处理器所执行的方法。
第十五方面，本申请公开了一种通信装置，该通信装置可以为上述方法实施例中的终端设备(或网络设备)，或者为设置在终端设备(或网络设备)中的芯片。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行该计算机程序或指令时，使通信装置执行上述方法实施例中由终端设备(或网络设备)、或终端设备(或网络设备)中的芯片所执行的方法。
第十六方面，本申请公开了一种通信***，该通信***可以包括执行上述第一方面(或第三方面，或第五方面)公开的通信方法的终端设备和执行上述第二方面(或第四方面，或第六方面)公开的通信方法的网络设备。
第十七方面，本申请公开了一种计算机可读存储介质，该计算机可读存储介质上存储有计算机程序或计算机指令，当该计算机程序或计算机指令被处理器运行时，实现如上述各方面公开的通信方法。
第十八方面，本申请公开了一种芯片，包括处理器，用于执行存储器中存储的程序，当程序被执行时，使得芯片执行上面的方法。
作为一种可能的实施方式，存储器位于芯片之外。
第十九方面，本申请公开了一种计算机程序产品，该计算机程序产品包括计算机程序代码，当该计算机程序代码被处理器运行时，使得上述通信方法被执行。
上述第七方面到第十九方面的有益效果与第一方面到第六方面中对应的方法的有益效果类似，详细描述可以参考对应方法的有益效果。
附图说明
图1是本申请实施例公开的一种网络架构示意图；
图2是本申请实施例公开的一种5G***的***架构示意图；
图3是本申请实施例公开的一种LTE***的***架构示意图；
图4是本申请实施例公开的一种NE-DC的场景的示意图；
图5是本申请实施例公开的一种CA场景的示意图；
图6是本申请实施例公开的一种通信方法的流程示意图；
图7是本申请实施例公开的另一种通信方法的流程示意图；
图8是本申请实施例公开的又一种通信方法的流程示意图；
图9是本申请实施例公开的一种通信装置的结构示意图；
图10是本申请实施例公开的另一种通信装置的结构示意图；
图11是本申请实施例公开的又一种通信装置的结构示意图。
具体实施方式
本申请实施例公开了一种通信方法及装置，用于提高组播业务的连续性。以下分别进行详细说明。
为了更好地理解本申请实施例，下面先对本申请实施例使用的网络架构进行描述。请参阅图1，图1是本申请实施例公开的一种网络架构示意图。如图1所示，该网络架构可以包括终端设备101和网络设备102。 终端设备101和网络设备102之间的通信可以包括上行通信(即终端设备101到网络设备102的通信)和下行通信(即网络设备102到终端设备101的通信)。在上行通信中，终端设备101，用于向网络设备102发送上行信号；网络设备102，用于接收来自终端设备101的上行信号。上行信号可以为上行控制信息，可以通过物理上行控制信道(physical uplink control channel，PUCCH)传输。上行信号也可以为上行数据，可以通过物理上行共享信道(physical uplink share channel，PUSCH)传输。在下行通信中，网络设备102，用于向终端设备101发送下行信号；终端设备101，用于接收来自网络设备102的下行信号。下行信号可以为下行控制信息，可以通过物理下行控制信道(physical downlink control channel，PDCCH)传输。下行信号也可以为下行数据，可以通过物理下行共享信道(physical downlink share channel，PDSCH)传输。
终端设备可以称之为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等，是指向用户提供语音和/或数据连通性的设备。终端设备可以为手机(mobile phone)、手持终端、客户终端设备(customer premise equipment，CPE)、笔记本电脑、用户单元(subscriber unit)、蜂窝电话(cellular phone)、智能电话(smart phone)、计算设备、无线数据卡、个人数字助理(personal digital assistant，PDA)电脑、平板型电脑、带无线收发功能的电脑、无线制解调器(modem)、触觉终端设备、手持设备(handheld)、膝上型电脑(laptop computer)、会话启动协议(session initiation protocol，SIP)电话、无绳电话(cordless phone)或者无线本地环路(wireless local loop，WLL)台、机器类型通信(machine type communication，MTC)终端，可穿戴设备(如智能手表、智能手环、计步器等)，车载终端设备(如汽车、自行车、电动车、飞机、船舶、火车、高铁等)、扩展现实(extended reality，XR)终端设备、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、智能家居设备(如冰箱、电视、空调、电表等)、智能机器人、车间设备、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、无线数据卡、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，或智慧家庭(smart home)中的无线终端、飞行设备(如智能机器人、热气球、无人机、飞机等)或其他可以接入网络的设备。
此外，终端设备也可以是未来通信***(例如第六代(6th generation，6G)通信***等)中的终端设备或者未来演进的公共陆地移动网络(public land mobile network，PLMN)中的终端设备等。示例性的，6G网络可以进一步扩展第五代(5th generation，5G)通信终端设备的形态和功能，6G终端设备包括但不限于车、蜂窝网络终端设备(融合卫星终端功能)、无人机、物联网(internet of things，IoT)。
上述网络设备可以为接入网设备，也可以为核心网设备。
接入网设备为为终端设备提供无线接入的无线接入网(radio access network，RAN)设备或节点，具有无线收发功能，主要负责空口侧的无线资源管理、服务质量(quality of service，QoS)流管理、数据压缩和加密等功能。接入网设备可以包括各种形式的基站，例如：宏基站，微基站(也称为小站)，微微基站、小站、中继站、接入点卫星、气球站等。接入网设备还可以包括长期演进(long term evolution，LTE)中的演进型基站(evolved Node B，eNB或eNodeB)。接入网设备还可以包括5G网络中的下一代基站(next generation Node B，gNB)或传输接收点(transmitting and receiving point，TRP)。接入网设备还可以包括第三代合作伙伴(3rd generation partnership project，3GPP)后演进的基站，或者未来演进的PLMN中的基站，宽带网络业务网关(broadband network gateway，BNG)，3GPP汇聚交换机或者非3GPP接入设备、WiFi***中的接入点(access point，AP)、发射点(transmitting point，TP)、移动交换中心等，还可以是设备到设备(device-to-device，D2D)、车辆外联(vehicle-to-everything，V2X)、机器到机器(machine-to-machine，M2M)通信中承担基站功能的设备等。
核心网设备是指为终端设备提供业务支持的核心网(core network，CN)中的设备，主要负责注册，呼叫的接续、计费，移动性管理，提供用户连接、对用户的管理以及对业务完成承载，数据的处理和路由等功能。核心网设备在不同的通信***可以对应不同的设备。例如，在***(4th generation，4G)通信***中可以对应移动管理实体(mobility management entity，MME)、服务网关(serving gateway，S-GW)等中的一个或多个。再例如，在5G通信***中可以对应接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、用户面功能(user plane function，UPF)网元等中的一个或多个网元。在下一代通信***或未来通信***中可以为为终端设备提供业务支持的一个或多个网元、设备或实体。
需要说明的是，图1所示的网络架构中不限于仅包括图中所示的终端设备101和网络设备102，还可以包括其它未在图中表示的终端设备和网络设备，具体本申请在此处不再一一列举。
上述网络架构可以应用于5G***。示例性的，5G***的***架构可以如图2所示。上述网络架构也可以应用于LTE***。示例性的，LTE***的***架构可以如图3所示。上述网络架构可以应用于独立部署(即独立组网)的5G***或LTE***，也可以应用于非独立部署(即非独立组网)的5G***或LTE***，如双连接(dualconnectivity，DC)场景、载波聚合(carrier aggregation，CA)场景等。DC场景可以包括下一代(next generation，NG)EN-DC、NE-DC和新无线(new radio，NR)-DC。EN和NE中的E代表演进的通用移动通信***(universal mobile telecommunications system，UMTS)陆地无线接入网(evolvedUMTS terrestrial radio access network，E-UTRAN)，即4G无线接入网，N代表NR。示例性的，NE-DC的场景的示意图可以如图4所示。示例性的，CA场景的示意图可以如图5所示。
上述网络架构还可以应用于窄带物联网***(narrow band-internet of things，NB-IoT)、全球移动通信***(global system for mobile communications，GSM)、增强型数据速率GSM演进***(enhanced data rate for GSM evolution，EDGE)、宽带码分多址***(wideband code division multiple access，WCDMA)、码分多址2000***(code division multiple access，CDMA2000)、时分同步码分多址***(time division-synchronization code division multiple access，TD-SCDMA)以及6G等5G之后演进的通信***。
为了更好地理解本申请实施例，下面先对本申请实施例的相关技术进行描述。
一.RRC状态
5GNR中终端设备有三种RRC状态：RRC连接态(RRC connected state)，RRC空闲态(RRC idle state)，RRC非活动态(RRC inactive state)。RRC连接态下终端设备和接入网设备之间建立了RRC连接，终端设备和接入网设备之间可以执行信令和数据的传输；当终端设备与接入网设备之间没有数据要传时，接入网设备可以将终端设备释放到RRC空闲态，RRC空闲态下接入网设备与终端设备之间没有RRC连接，此时终端设备与接入网设备之间没有数据传输也没有RRC信令连接。NR中引入了RRC非活动态，RRC非活动态下终端设备一般会停止数据的传输(终端在RRC非活动态也可以进行小包传输等)，但接入网设备仍维护终端设备的上下文信息。引入RRC非活动态的好处是相比于RRC空闲态，RRC非活动态下由于接入网设备仍保留终端设备的上下文信息，因此可以更快速地恢复RRC连接态，当有业务到达时，可以降低业务传输时延。另外，相比于RRC连接态，RRC非活动态的终端设备的功耗相对较低(可类比RRC空闲态)，所以也有利于终端设备节能。
接入网设备可以通过向终端设备发送RRC释放(Release)消息将终端设备释放到RRC空闲态或者RRC非活动态。当终端设备接收到的RRCRelease消息中包含挂起配置(suspendConfig)时，终端设备进入RRC非活动态，执行小区选择流程。当终端设备接收到的RRCRelease消息中不包含suspendConfig时，除了网络协议(internet protocol，IP)多媒体子***(IP multimedia subsystem，IMS)语音(voice)的演进分组***(evolved packet system，EPS)回落(fallback)、异***小区重选等场景外，终端设备进入RRC空闲态，执行小区选择流程。
二.小区选择与小区重选
小区选择
当处于RRC连接态的终端设备收到RRC Release消息时，终端设备进入RRC空闲态或RRC非活动态并进行小区选择，以选择到一个合适的小区或者可接受的小区驻留。终端设备可以根据小区选择准则(cell selection criterion)(也叫做S准则)，通过对小区接收功率、小区接收质量等参数判定小区是否合适接入。满足S准则的条件为：
Srxlev＞0且Squal＞0
其中，Srxlev是小区选择接收功率值(cell selection RX level value)，单位为分贝(decibel，dB)，Squal是小区选择质量值(cell selection quality value)，单位为dB。Srxlev和Squal可以表示如下：
Srxlev＝Qrxlevmeas-(Qrxlevmin+Qrxlevminoffset)-Pcompensation-Qoffsettemp
Squal＝Qqualmeas-Qqualmin+Qqualminoffset)-Qoffsettemp
其中，Qrxlevmeas为测量的小区接收功率值，Qrxlevmin为小区所需的最低接收功率值，Qrxlevminoffset为Qrxlevmin的偏移值，Pcompensation为功率补偿值，Qoffsettemp为应用于小区的偏移值，Qqualmeas为测量的小区质量值，Qqualmin为小区所需的最低质量值，Qqualminoffset为Qqualmin的偏移值。
UE进行小区选择时可以执行以下两个过程中的一个过程。
第一.初始小区选择(终端设备没有射频(radio frequency，RF)信道和NR频率的先验信息)
终端设备会根据自身的能力扫描NR频带(band)上所有的RF信道，在除了共享频谱之外的每个频 率上，终端设备仅需要搜索信号最强的小区，一旦发现一个合适的小区(即满足S准则的小区)，就选择该小区。
第二.利用存储的信息选择小区
本过程需要利用终端设备存储的频率信息，这些频率信息来自先前接收的测量控制信息或来自先前检测到的小区参数信息。可选地，还需要来自先前接收到的关于小区参数的信息。一旦找到一个合适的小区(即满足S准则的小区)，终端设备就选择该小区。如果找不到合适的小区，则可以启动初始小区选择流程。
终端设备在执行小区选择后，会启动***消息获取流程。
小区重选
处于RRC空闲/非活动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，我们将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。下面分别介绍。
第一.启动邻区测量
可以根据测量启动条件判断是否启动邻区测量，若满足测量启动条件，则终端设备可以开始测量相应的邻区的小区质量。可以根据邻区的重选优先级(或邻区所在频点优先级)和服务小区的小区质量来确定邻区是否满足测量启动条件。应理解，邻区为服务小区相邻的小区或广播的小区。
当邻区重选优先级高于服务小区重选优先级时，可以无条件启动邻区测量，即直接启动邻区测量。当邻区重选优先级低于或等于服务小区重选优先级时，可以先测量服务小区的小区质量，之后可以将服务小区的小区质量与网络下发的小区质量阈值进行比较，当服务小区的小区质量大于或等于(或等于)小区质量阈值时，可以不启动邻区测量，当服务小区的小区质量小于(或小于或等于)小区质量阈值时，可以启动邻区测量。
第二.重选评估判决
邻区测量完成之后，终端设备可以开始评估是否执行到邻区的小区重选。邻区的重选优先级不同，重选评估判决可以不同。
对于高重选优先级邻区，即邻区的重选优先级大于服务小区的重选优先级，当终端设备自驻留在当前服务小区超过1秒，且邻区的小区质量在超出特定时长内满足特定阈值时，可以执行到高重选优先级邻区的小区重选。高重选优先级小区重选时，同一频点重选优先级上如果有多个小区满足重选标准，可以对这些小区进行小区重选准则(R准则)排序，转换为同频重选问题，选择一个排名最高的小区。
R准则为：计算服务小区的小区质量等级Rs，以及与服务小区相邻的每个小区(即每个邻区)的小区质量等级Rn；之后可以根据小区质量等级对服务小区和服务小区的邻区进行排序，可以选择小区质量等级最大或接近最大的小区；最后在选择的这些小区中，可以选择波束信号质量满足要求的波束个数最多的小区作为最好小区，并称该小区满足小区重选原则。其中，Rs和Rn可以表示如下：
Rs＝Qmeas,s+Qhyst-Qoffsettemp
Rn＝Qmeas,n+Qoffset-Qoffsettemp
其中，Qmeas,s为测量的服务小区接收功率值，Qhyst为小区重选迟滞值，Qoffsettemp为小区选择和重选的附加偏移，当RRC连接建立失败时临时使用，Qmeas,n为测量的邻区接收功率值，Qoffset为服务小区与邻区之间的偏移量。
对于等(即同)重选优先级的邻区，即邻区的重选优先级等于服务小区的重选优先级，小区重选可以依据R准则进行。即计算满足小区选择标准的每一个邻区和当前服务小区的小区信号质量等级；然后根据小区信号质量等级排序，选择小区信号质量等级最大的小区或在多波束操作下选择接近最大一定范围内的小区，再在这些小区中选择波束信号质量满足要求的波束个数最多的小区作为最佳小区，若该最佳小区在一定持续时间间隔内持续满足小区重选准则，且终端设备在当前服务小区驻留超过1s，则终端设备启动向该邻区的小区重选。
对于低重选优先级的邻区，即邻区的重选优先级小于服务小区的重选优先级，如果终端设备驻留在服务小区超过1秒，且服务小区的小区质量低于特定阈值，且低重选优先级邻区的小区质量在超出特定时长 内满足另一特定阈值，则执行到低重选优先级邻区的小区重选。
如果具有不同重选优先级的多个小区满足小区重选标准，则对较高重选优先级频率的小区重选应优先于较低重选优先级频率的小区重选，即终端设备优先重选到高重选优先级频率的小区。
第三.小区重选执行
在完成邻区测量并确定存在符合小区重选条件的邻区后，终端设备可以开始尝试驻留到新的小区。终端设备需要接收来自目标邻区的***消息，之后可以根据***消息判断是否满足邻区的驻留条件。上述判断可以包括判断目标邻区是否允许终端设备接入等。当判断出终端设备不满足目标邻区的驻留条件(包括目标邻区禁止终端设备接入)时，终端设备可以将目标邻区排除在候选小区之外300秒(或最多300秒)。当判断出终端设备满足目标邻区的驻留条件(包括目标邻区允许终端设备接入)时，终端设备可以驻留到目标邻区。
上述小区重选优先级与小区所在的频点有关，同一无线接入技术(radio access technology，RAT)上同一频点的小区具有相同的小区重选优先级，不同频点的小区重选优先级可能相同也可能不同。即对于同频邻区，具有相同的小区优先级；对于异频小区，则可以分为高优先级邻区、同优先级邻区和低优先级邻区。网络可以配置小区重选过程中的频率优先级，小区重选的优先级可以通过***消息发送给终端设备(小区通用小区重选)，也可以通过专用信令发送给终端设备(如RRC Release消息)。
三.MBS广播
广播通信服务是指向广播覆盖区域内的所有终端设备同时提供相同业务和相同特定内容数据的通信服务，即广播覆盖区域内的所有终端设备都可以接收数据。在NR MBS中，广播支持在RRC空闲态、RRC非活动态和RRC连接态的接收，广播采用了点到多点(point-to-multipoint，PTM)的传输方式，即一个接入网设备可以通过空口向多个终端设备发送一份MBS数据包，终端设备可以通过一个公共的无线网络临时标识(radio network temporary identifier，RNTI)，如组无线网络临时标识(group radio network temporary identifier，G-RNTI)，去解码接入网设备调度的广播会话的下行数据。
NR MBS广播采用两步配置的方式。接入网设备可以广播***消息块(system information block，SIB)20，其中携带用于MBS广播的MBS控制信道(MBS control channel，MCCH)配置，包括MCCH的重复周期和偏移、MCCH窗口持续时长、MCCH窗口起始时隙、MCCH修改周期等。MCCH消息(或者说通过MCCH信道发送的信息)是周期性传输的，以配置的重复周期，在配置的MCCH传输窗口内传输。MCCH是每小区(per小区)配置的，在Rel-17中，每个小区只有一种MCCH配置。
MCCH中携带了MBS广播配置信息，会提供该小区正在提供的MBS广播会话列表，对每个提供的MBS广播会话，提供例如该广播会话的标识(identity，ID)(临时多播组标识(temporary multicast group identifier，TMGI)、G-RNTI，可选的提供例如广播MRB配置、MBS业务信道(多播业务信道(MBS traffic channel，MTCH))的非连续接收(discontinuous reception，DRX)配置、能提供该广播会话的邻小区列表。
终端设备在对接收MBS广播服务感兴趣时，应执行MCCH信息获取过程。感兴趣接收MBS广播服务的终端设备应在进入提供SIB20的小区时应用MCCH信息获取过程(例如，在开机时、在终端设备移动小区后)，以及在接收到由于新MBS服务开始的MCCH更改通知时。
四.MBS组播
在Rel-17中，NR MBS组播仅支持终端设备在RRC连接态接收MBS组播业务。MBS组播可以采用点到点(point to point，PTP)的传输，也可以采用PTM的传输。典型的组播服务场景如公共安全和关键任务(mission critical)、交互式网络电视(internet protocol television，IPTV)、视频直播等。接收MBS组播业务的终端设备要与核心网之间进行鉴权流程后才能接受某个MBS组播业务(或者说MBS会话(session))，每个MBS会话是通过TMGI进行标识。在空口上终端设备通过专用信令(比如RRC重配置消息)接收接入网设备下发的连接态组播配置，例如对组播MRB的配置。每个MBS组播会话可以关联一个或多个组播MRB，在组播MRB的配置中会包含TMGI信息，以显示指示该组播MRB关联的组播会话。
然而，当一个小区内接收MBS组播业务的终端设备数量过多时，可能超出小区能够容纳的RRC连接态的终端设备数量。因此，在Rel-18中，为了缓解网络拥塞，提出支持终端设备在RRC非活动态接收MBS组播业务。例如当终端设备没有单播业务，仅有组播业务时，网络可以将终端设备释放到RRC非活动态接收组播。这既有利于缓解网络拥塞，也有利于终端设备节能。
终端设备获取RRC非活动态的组播配置有如下可能的方式(但不限于如下方式)：一种是类似于Rel-17广播，终端设备通过***消息获得某一个或多个组播控制信道的配置，通过组播控制信道获取RRC非活动态组播的PTM配置。组播控制信道可以是一个特定的逻辑信道，可以通过特定的逻辑信道ID来标识。另一 种类似Rel-17组播，终端设备在RRC连接态通过专用信令(例如通过RRC重配置消息)获得RRC非活动态组播配置。
然而，由于处于RRC非活动态的终端设备无法提供上行反馈，因此对于覆盖较差的RRC非活动态的终端设备，组播的业务性能(如数据包解码成功率)会变差。为了保证RRC非活动态接收组播的性能，提出网络仅对覆盖较好的组播终端设备释放到RRC非活动态接收组播。
当终端设备收到网络下发的RRC Release消息(其中包含suspendConfig)指示进入RRC非活动态时，终端设备会进入RRC非活动态并执行小区选择。当终端设备选择到了其他满足S准则的小区时，需要重新获取该小区的RRC非活动态组播配置再根据该小区的组播配置接收组播业务。重新获取小区的RRC非活动态组播配置再接收组播会导致组播业务的接收出现短暂中断，以致影响组播业务的连续性。此外，当终端设备在服务小区覆盖较好的情况下，终端设备不必要的执行小区选择流程会增加终端设备的功耗。
有鉴于此，本申请实施例提供了一种通信方法，用于终端设备在RRC非连接态通过终端设备在RRC连接态的服务小区接收组播业务。
基于上述网络架构，请参阅图6，图6是本申请实施例公开的一种通信方法的流程示意图。如图6所示，该通信方法可以包括以下步骤。
601.网络设备向处于RRC连接态的第一终端设备发送第一信息。
相应地，第一终端设备在RRC连接态接收来自网络设备的第一信息。
在与网络设备进行RRC连接态通信的终端设备数量较多，或者接入终端设备所在小区的RRC连接态的终端设备数量较多，或者终端设备所在小区进行RRC连接态的组播业务的终端设备数量较多的情况下，网络设备可以向处于RRC连接态的第一终端设备发送第一信息。
应理解，第一终端设备即权利要求和发明内容中的终端设备。此处为了区分具体的一个终端设备将权利要求和发明内容中的终端设备称为第一终端设备。
与网络设备进行RRC连接态通信的终端设备数量较多，可以理解为与网络设备进行RRC连接态通信的终端设备数量大于第一阈值，也可以理解为与网络设备进行RRC连接态通信的终端设备数量与网络设备能够容纳的RRC连接态的终端设备数量之间的比值大于第二阈值。与网络设备进行RRC连接态通信的终端设备，可以理解为与网络设备进行通信且处于RRC连接态的终端设备，也可以理解为与网络设备建立RRC连接的终端设备。
接入终端设备所在小区的RRC连接态的终端设备数量较多，可以理解为接入终端设备所在小区的RRC连接态的终端设备数量大于第三阈值，也可以理解为接入终端设备所在小区的RRC连接态的终端设备数量与该小区能够容纳的RRC连接态的终端设备数量之间的比值大于第四阈值。
终端设备所在小区进行RRC连接态的组播业务的终端设备数量较多，可以理解为终端设备所在小区进行RRC连接态的组播业务的终端设备数量大于第五阈值，也可以理解为终端设备所在小区进行RRC连接态的组播业务的终端设备数量与该小区能够容纳的RRC连接态的终端设备数量之间的比值大于第六阈值。
应理解，组播业务也可以称为组播会话。此处的组播业务可以为MBS组播业务，也可以为其他组播业务，在此不作限定。
应理解，第一终端设备为与网络设备建立RRC连接的一个终端设备，即与网络设备进行通信且处于RRC连接态的一个终端设备。第一终端设备可以为与网络设备建立RRC连接的任一终端设备，表明网络设备为了缓解网络拥塞，可以让一个或多个终端设备在RRC非连接态接收组播业务。第一终端设备也可以为与网络设备建立RRC连接且覆盖较好的一个终端设备，表明网络设备为了缓解网络拥塞，可以让覆盖较好的一个或多个终端设备在RRC非连接态接收组播业务。
第一信息指示第一终端设备在RRC非连接态接收组播业务。RRC非连接态可以为RRC空闲态，也可以为RRC非活动态，还可以为RRC空闲态和RRC非活动态。第一信息可以携带在RRC释放消息中，即通过RRC释放消息向第一终端设备发送第一信息，也即网络设备向第一终端设备发送RRC释放消息，RRC释放消息包括第一信息。第一信息也可以携带在RRC重配置消息。第一信息还可以携带在其他消息或信令中，在此不加限定。第一信息可以为配置第一终端设备在RRC非连接态接收组播业务的配置信息。该配置信息可以包括组播MRB的配置。第一信息也可以为其他信息，在此不加限定。
指示第一终端设备在RRC非连接态接收组播业务，可以理解为(或替换为)指示第一终端设备的组播业务配置用于RRC非连接态，也可以理解为指示第一终端设备的组播业务处于激活状态或组播业务未释放，还可以理解为指示第一终端设备进入RRC非连接态的目的是接收组播业务，还可以理解为指示第一终端设 备的组播MRB不挂起或不释放。
可以通过1比特(bit)、标志位或指示位指示第一信息。在网络设备需要向第一终端设备发送第一信息的情况下，网络设备可以向第一终端设备发送包括第一信息对应的比特位、标志位或指示位的消息或信令。相应地，第一终端设备可以接收到包括第一信息对应的比特位、标志位或指示位的消息或信令。在网络设备不需要向第一终端设备发送第一信息的情况下，网络设备不向第一终端设备发送包括第一信息对应的比特位、标志位或指示位的消息或信令。相应地，第一终端设备接收不到包括第一信息对应的比特位、标志位或指示位的消息或信令。
也可以通过1比特指示第一信息，示例性的，在网络设备需要向第一终端设备发送第一信息的情况下，这个比特的值为1。在网络设备不需要向第一终端设备发送第一信息的情况下，这个比特的值为0。反之亦然。
还可以通过多比特指示第一信息。示例性的，在网络设备需要向第一终端设备发送第一信息的情况下，这多比特的值均为1。在网络设备不需要向第一终端设备发送第一信息的情况下，这多比特的值均为0。
第一信息可以指示第一终端设备在RRC非连接态接收组播业务，但并不指示具体接收哪个或哪些组播业务。
第一信息指示接收的组播业务可以是激活状态的组播业务和/或终端设备正在接收的组播业务。
第一信息也可以指示第一终端设备在RRC非连接态接收具体的哪个或哪些组播业务。此时，第一信息可以指示上述组播业务的标识，也可以指示上述MRB的标识。此处的组播业务为需要第一终端设备在RRC非连接态接收的组播业务。组播业务的标识可以为组播业务的名称，也可以为组播业务对应或关联的TMGI，还可以为组播业务对应或关联的RNTI。组播业务对应或关联的TMGI，可以理解为标识该组播业务的TMGI。组播业务对应或关联的RNTI，可以理解为用于加扰/或解扰该组播业务的RNTI。该MRB为该组播业务关联的MRB。
示例性的，第一信息可以指示第一终端设备在RRC非连接态接收第一组播业务。指示第一终端设备在RRC非连接态接收第一组播业务，可以理解为指示第一组播业务配置用于RRC非连接态，也可以理解为指示第一组播业务处于激活状态或第一组播业务未释放，还可以理解为指示第一终端设备进入RRC非连接态的目的是接收第一组播业务，还可以理解为指示第一组播业务对应的MRB不挂起或不释放(这种情况下一个组播业务可以对应一个或多个组播MRB)，还可以理解为指示第一组播业务关联的MRB不挂起或不释放。
602.第一终端设备进入RRC非连接态。
网络设备要将第一终端设备释放到RRC非连接态时，可以向处于RRC连接态的第一终端设备发送RRC释放消息。相应地，第一终端设备可以在RRC连接态接收来自网络设备的RRC释放消息，之后可以根据RRC释放消息进入RRC非连接态，即由RRC连接态切换到RRC非连接态。
网络设备要将第一终端设备释放到RRC非活动态时，RRC释放消息包括suspendConfig。网络设备要将第一终端设备释放到RRC空闲态时，RRC释放消息不包括suspendConfig。因此，第一终端设备接收到RRC释放消息之后，在RRC释放消息不包括suspendConfig的情况下，可以根据RRC释放消息进入RRC空闲态，在RRC释放消息包括suspendConfig的情况下，可以根据RRC释放消息进入RRC非活动态。
在第一信息不携带在RRC释放消息中的情况下，网络设备可以先向第一终端设备发送第一信息，之后可以向第一终端设备发送RRC释放消息。相应地，第一终端设备可以先接收到第一信息，再接收到RRC释放消息。
603.第一终端设备在RRC非连接态通过第一小区接收组播业务。
第一终端设备进入RRC非连接态之后，可以在RRC非连接态通过第一小区接收组播业务，即可以根据第一信息在RRC非连接态通过第一小区接收组播业务。
第一小区为第一终端设备在RRC连接态的服务小区，该服务小区可以为主小区(primary cell，PCell)，也可以为辅小区(secondary cell，Scell)。第一终端设备在RRC连接态的服务小区，可以理解为进入RRC非连接态前的服务小区，也可以理解为进入RRC非连接态前RRC连接态的服务小区，还可以理解为第一终端设备接收到RRC释放消息时所在的小区。第一终端设备可以在RRC连接态通过第一小区接收组播业务，也可以在RRC连接态未开始接收组播业务，或在RRC连接态未通过第一小区接收组播业务。
在第一终端设备在RRC连接态通过第一小区接收组播业务的情况下，第一小区可以为第一终端设备在RRC连接态的PCell，也可以为第一终端设备在RRC连接态的Scell。在第一终端设备在RRC连接态未开始接收组播业务，或在RRC连接态未通过第一小区接收组播业务的情况下，第一小区为第一终端设备在RRC连 接态的PCell。
示例性的，在第一终端设备在RRC连接态通过第一辅小区接收第一组播业务的情况下，第一终端设备从RRC连接态进入RRC非连接态后，第一终端设备驻留在第一辅小区上，进入RRC非连接态后，无需重新获取第一辅小区的RRC非连接态组播配置，可以应用RRC连接态在第一辅小区上接收第一组播业务的配置在RRC非连接态接收第一组播业务，可以保证第一终端设备在第一辅小区上接收第一组播业务的连续性。
在第一终端设备由RRC连接态进入RRC非连接态的情况下，第一终端设备可以不执行小区选择。可以理解为在第一终端设备由RRC连接态进入RRC非连接态时，第一终端设备不执行小区选择，也可以理解为在第一终端设备由RRC连接态进入RRC非连接态后，第一终端设备不执行小区选择。
第一终端设备不执行小区选择，可以理解为第一终端设备不根据小区选择准则进行小区信号质量的评估，保持驻留在第一小区。但是进入RRC非连接态后，为了保证第一终端设备在RRC非连接态下的移动性，第一终端设备仍会进行小区重选，根据小区重选准则进行小区重选的测量、评估和执行。
第一终端设备不执行小区选择，也可以理解为在第一小区满足驻留条件的情况下，驻留小区为第一小区。满足驻留条件可以包括满足小区驻留的S准则。一种情况下，第一终端设备可以先判断第一小区是否满足驻留条件，在第一小区满足驻留条件的情况下，不执行小区选择，直接将第一小区确定为驻留小区。在第一小区不满足驻留条件的情况下，第一终端设备可以执行小区选择。此处判断第一小区是否满足驻留条件的过程，不属于小区选择过程。另一种情况下，第一终端设备执行小区选择时优先选择第一小区，即第一终端设备进入RRC非连接态后仍然进行一次小区选择，但优先判断第一小区是否满足驻留条件，在第一小区满足驻留条件的情况下，确定驻留小区为第一小区。在第一小区不满足驻留条件的情况下，第一终端设备再搜索其他满足S准则的小区尝试驻留。
可选地，上述通信方法还可以包括：
604.第一终端设备向网络设备发送第二信息。
相应地，网络设备接收来自第一终端设备的第二信息。
在终端设备不支持RRC非连接态组播业务的情况下，网络设备由于小区拥塞原因向终端设备发送RRCRelease消息指示终端设备进入RRC非连接态收组播业务，终端设备可能通过小区选择到一个邻小区上请求进入RRC连接态以接收组播业务，重新建立RRC连接的时延较大，会导致组播业务接收的中断。终端设备也可能再次向当前驻留的服务小区的网络设备请求进入RRC连接态收组播业务，网络设备很可能再次拒绝终端设备的RRC连接恢复请求，这又会造成不必要的信令开销。为了避免上述问题，第一终端设备可以向网络设备发送第二信息。第二信息用于指示支持在RRC非连接态接收组播业务，即指示第一终端设备支持在RRC非连接态接收组播业务。第一终端设备可以通过能力信息向网络设备上报第二信息。示例性的，第一终端设备可以向网络设备发送UE能力信息(UE Capability Information)，UE能力信息可以包括或携带有第二信息。相应地，网络设备可以接收来自第一终端设备的UE能力信息，之后可以从UE能力信息中获取第二信息。第一终端设备也可以通过其他信息、消息或信令向网络设备上报第二信息，在此不加限定。
在所有终端设备均支持在RRC非连接态接收组播业务的情况下，第一终端设备可以不向网络设备发送第二信息，即不执行步骤604，可以避免不必要信息的传输，从而可以节约传输资源。相应地，网络设备可以向与之建立RRC连接的任一终端设备发送第一信息。
在有些终端设备支持在RRC非连接态接收组播业务，而有些终端设备不支持在RRC非连接态接收组播业务的情况下，为了避免网络设备向不支持在RRC非连接态接收组播业务的终端设备发送第一信息，可以是只有支持在RRC非连接态接收组播业务的终端设备向网络设备发送第二信息，此时，第一终端设备可以向网络设备发送第二信息。相应地，网络设备可以根据第二信息向第一终端设备发送第一信息。网络设备可以根据第二信息向第一终端设备发送第一信息。
也可以是支持在RRC非连接态接收组播业务的终端设备向网络设备发送第二信息，而不支持在RRC非连接态接收组播业务的终端设备向网络设备发送第五信息。第五信息用于指示不支持在RRC非连接态接收组播业务。网络设备可以根据第二信息和第五信息来决定向哪些终端设备发送第一信息。
可选地，上述通信方法还可以包括：
605.网络设备向第一终端设备发送第一配置信息。
相应地，第一终端设备接收来自网络设备的第一配置信息。
第一配置信息可以用于配置第一终端设备在RRC非连接态接收组播业务。第一配置信息可以携带在RRC重配置消息中，也可以携带在其他消息或信令中。
在网络设备需要第一终端设备在RRC非连接态接收组播业务的情况下，网络设备可以向第一终端设备 发送第一配置信息，以便第一终端设备在RRC非连接态可以根据第一配置信息接收组播业务。相应地，步骤603可以替换为：第一终端设备根据第一配置信息在RRC非连接态通过第一小区接收组播业务。
第一配置信息可以包括组播MRB配置、组播公共频率资源(common frequency resource，CFR)配置等。组播MRB配置用于配置承载组播业务的MRB，CFR配置用于配置组播业务的频率资源。第一配置信息可以是一个或多个组播业务的配置信息。
第一配置信息还可以用于配置终端设备在RRC连接态接收组播业务。即网络设备可以对同一组播业务发送一套组播业务配置，这套组播业务配置既可以用于RRC连接态也可以用于RRC非连接态。也即在RRC连接态和RRC非连接态对同一组播业务有不同的配置信息，RRC连接态为配置信息1，RRC非连接态为配置信息2。RRC连接态和RRC非连接态有不同的配置信息可以理解为一部分的组播配置参数相同，一部分的组播配置参数不同。示例性的，第一配置信息可以包括一组配置参数，RRC非连接态与RRC连接态不同的配置参数仅为这一组配置参数中的一部分配置参数。
在第一配置信息仅用于配置第一终端设备在RRC非连接态接收组播业务的情况下，网络设备可以向处于RRC连接态或RRC非连接态的第一终端设备发送第一配置信息。在第一配置信息用于配置第一终端设备在RRC连接态和RRC非连接态接收组播业务的情况下，网络设备可以向处于RRC连接态的第一终端设备发送第一配置信息。
可见，终端设备可以在RRC连接态通过专用信令获取到RRC非连接态的组播配置，这样终端设备进入RRC非连接态之后如果仍驻留在当前小区上，则不需要重新去获取RRC非连接态的组播配置，可以提高组播业务的接收效率。在终端设备在RRC连接态想要接收的组播业务激活，或者终端设备在RRC连接态已经开始接收组播业务的情况下，终端设备可以在RRC连接态获得RRC非连接态的组播业务的配置信息，以便终端设备从RRC连接态进入RRC非连接态后，在服务小区上无需再次去获取RRC非连接态的组播业务的配置信息，而是用RRC连接态收到的RRC非连接态的组播业务的配置信息去接收，从而可以提高组播业务的连续性。
在所有终端设备均支持在RRC非连接态接收组播业务的情况下，网络设备可以直接向第一终端设备发送第一配置信息。
在存在终端设备不支持在RRC非连接态接收组播业务的情况下，网络设备可以根据终端设备上报的第二信息或第五信息向终端设备发送第一配置信息。在第一终端设备支持在RRC非连接态接收组播业务，即第一终端设备上报了第二信息的情况下，网络设备才向第一终端设备发送第一配置信息，可以避免向不支持在RRC非连接态接收组播业务的终端设备配置用于RRC非连接态接收组播业务的配置信息。
可选地，上述通信方法还可以包括：第一终端设备获取来自网络设备的***信息，***信息为RRC非连接态所需的***信息。
第一终端设备由RRC连接态进入RRC非连接态不执行小区选择的情况下，第一小区需要执行一次***信息获取流程，以获取第一终端设备在RRC非连接态所需的***信息。
一般终端设备由RRC连接态进入RRC非连接态，在执行小区选择后会执行***信息的获取流程，由于第一终端设备不执行小区选择，因此为了避免第一终端设备无法获得用于RRC非连接态的上述***消息，第一终端设备在进入RRC非连接态后需要在第一小区重新获取一次***消息，否则第一终端设备无法正确地执行小区重选。示例性的，小区重选相关的***消息，如SIB2/SIB3/SIB4/SIB5等，网络设备在第一终端设备进入RRC非连接态之前未广播，以致第一终端设备没有RRC非连接态所需的***信息。
基于上述网络架构，请参阅图7，图7是本申请实施例公开的另一种通信方法的流程示意图。如图7所示，该通信方法可以包括以下步骤。
701.网络设备向处于RRC连接态的第一终端设备发送第三信息。
相应地，第一终端设备在RRC连接态接收来自网络设备的第三信息。
在第一终端设备需要在RRC非连接态接收组播业务的情况下，或其他不希望第一终端设备由RRC连接态进入RRC非连接态执行小区选择导致小区切换的场景或情况下，网络设备可以向处于RRC连接态的第一终端设备发送第三信息。
第一终端设备为与网络设备建立RRC连接的一个终端设备，即与网络设备进行通信且处于RRC连接态的一个终端设备。第一终端设备可以为与网络设备建立RRC连接的任一终端设备，也可以为与网络设备建立RRC连接且覆盖较好的一个终端设备。
第三信息用于指示由RRC连接态进入RRC非连接态不执行小区选择。RRC非连接态可以为RRC空闲态， 也可以为RRC非活动态，还可以为RRC空闲态和RRC非活动态。第三信息可以携带在RRC释放消息中，也可以携带在RRC重配置消息中，还可以携带在其他消息或信令中。
一种情况下，在网络设备需要第一终端设备由RRC连接态进入RRC非连接态不执行小区选择的情况下，网络设备可以向第一终端设备发送第三信息。在网络设备需要第一终端设备由RRC连接态进入RRC非连接态执行小区选择的情况下，网络设备可以不向第一终端设备发送第三信息。示例性的，可以通过1比特、标志位或指示位指示第三信息。在网络设备需要第一终端设备由RRC连接态进入RRC非连接态不执行小区选择的情况下，RRC释放消息或RRC重配置消息可以包括这1比特、标志位或指示位，在网络设备需要第一终端设备由RRC连接态进入RRC非连接态执行小区选择的情况下，RRC释放消息或RRC重配置消息不包括这1比特、标志位或指示位。
另一种情况下，在网络设备需要第一终端设备由RRC连接态进入RRC非连接态不执行小区选择的情况下，网络设备可以向第一终端设备发送第三信息。在网络设备需要第一终端设备由RRC连接态进入RRC非连接态执行小区选择的情况下，网络设备可以向第一终端设备发送第六信息。第六信息用于指示由RRC连接态进入RRC非连接态执行小区选择。即网络设备可以指示第一终端设备由RRC连接态进入RRC非连接态执行小区选择或不执行小区选择。示例性的，可以通过1比特指示第三信息或第六信息。在网络设备需要第一终端设备由RRC连接态进入RRC非连接态不执行小区选择的情况下，RRC释放消息或RRC重配置消息中的这个比特的值为1，表明网络设备向第一终端设备发送了第三信息。在网络设备需要第一终端设备由RRC连接态进入RRC非连接态执行小区选择的情况下，RRC释放消息或RRC重配置消息中的这个比特的值为0，表明网络设备向第一终端设备发送了第六信息。
702.第一终端设备进入RRC非连接态。
网络设备要将第一终端设备释放到RRC非连接态时，可以向处于RRC连接态的第一终端设备发送RRC释放消息。相应地，第一终端设备可以在RRC连接态接收来自网络设备的RRC释放消息，之后可以根据RRC释放消息进入RRC非连接态。
在第三信息不携带在RRC释放消息中的情况下，网络设备可以先向第一终端设备发送第三信息，之后可以向第一终端设备发送RRC释放消息。相应地，第一终端设备可以先接收到第三信息，再接收到RRC释放消息。
第一终端设备由RRC连接态进入RRC非连接态不执行小区选择。第一终端设备不执行小区选择的详细描述可以参考步骤603中的相关描述，在此不再赘述。
本实施例中，终端设备由RRC连接态进入RRC非连接态不执行小区选择，可以避免终端设备从RRC连接态进入RRC非连接态执行小区选择时接收组播业务的中断，可以提高组播业务的连续性，同时可以降低小区选择过程中搜索小区的能耗，从而可以降低终端设备的功耗。
其中，图7对应的通信方法可以单独使用，也可以与图6对应的通信方法结合使用。在图6与图7结合使用的情况下，在网络设备向第一终端设备发送了第三信息或第六信息的情况下，第一终端设备是根据第三信息或第六信息确定是否执行小区选择，而不是根据第一信息确定是否执行小区选择。示例性的，在RRC释放消息包括第一信息和第三信息的情况下，第一终端设备不执行小区选择；在RRC释放消息包括第一信息而不包括第三信息，或包括第一信息和第六信息的情况下，第一终端设备执行小区选择。可见，在协议规定终端设备不执行小区选择通过第三信息指示的情况下，如果没有收到第三信息则意味着执行小区选择，而不是根据第一信息不执行小区选择。
基于上述网络架构，请参阅图8，图8是本申请实施例公开的另一种通信方法的流程示意图。如图8所示，该通信方法可以包括以下步骤。
801.网络设备向处于RRC连接态的第一终端设备发送用于指示频率优先级的第四信息。
相应地，第一终端设备在RRC连接态接收来自网络设备的用于指示频率优先级的第四信息。
在网络设备需要将第一终端设备释放到RRC非连接态的情况下，网络设备可以向处于RRC连接态的第一终端设备发送第四信息。第一终端设备可以为与网络设备建立RRC连接的任一终端设备，即与网络设备进行通信且处于RRC连接态的任一终端设备。
第四信息用于指示频率优先级。网络设备可以将第四信息广播给第一终端设备(例如第四信息包含在***消息中，或者第四信息包含在MCCH消息)，也可以通过RRC释放消息发送给第一终端设备。
频率优先级为频率的优先级。此处的频率为小区的频率。小区的频率为小区的工作频率。
802.第一终端设备在执行小区选择时，按照频率优先级从高到低的顺序选择驻留小区。
网络设备要将第一终端设备释放到RRC非连接态时，可以向处于RRC连接态的第一终端设备发送RRC释放消息。相应地，第一终端设备可以在RRC连接态接收来自网络设备的RRC释放消息，之后可以根据RRC释放消息进入RRC非连接态。
在第一信息不携带在RRC释放消息中的情况下，网络设备可以先向第一终端设备发送第四信息，之后可以向第一终端设备发送RRC释放消息。相应地，第一终端设备可以先接收到第四信息，再接收到RRC释放消息。
第一终端设备由RRC连接态进入RRC非连接态执行小区选择时，可以按照频率优先级从高到低的顺序选择驻留小区。频率优先级中的频率可以是按照从高到低的顺序进行排列的。因此，第一终端设备可以优先判断最高频率优先级对应的小区中是否存在满足S准则的小区，在最高频率优先级对应的小区中存在满足S准则的小区的情况下，可以选择满足S准则的小区，在最高频率优先级对应的小区中不存在满足S准则的小区的情况下，可以继续判断第二频率优先级对应的小区中是否存在满足S准则的小区，依次类推。对于同一频率优先级对应的小区，第一终端设备进行小区选择的顺序可以是随机决定的，也可以是按照与小区之间的距离确定的，还可以是通过其他方式确定的，在此不加限定。
频率优先级可以包括一个或多个频率列表。处于同一频率列表中的频率的优先级相同，处于不同频率列表中的频率的优先级不同。示例性的，频率优先级可以包括一个高优先级的频率列表，位于该频率列表中的一个或多个频率视为高优先级，其他频率视为低优先级。示例性的，频率优先级可以包括一个高优先级的频率列表和一个低优先级的频率列表。例如，高优先级的频率列表可以为：{频率1，频率2}，终端设备在执行小区选择时可以优先选择频率1和频率2对应的小区。示例性的，频率优先级可以包括一个高优先级的频率列表、一个中优先级列表和一个低优先级的频率列表。第一终端设备可以按照高优先级的频率列表、中优先级的频率列表和低优先级的频率列表进行选择。示例性的，频率优先级可以包括M个频率列表，分别为1、2、…，M，可以是数字越高对应的优先级越高，也可以是数字越高对应的优先级越低。M为大于或等于1的整数。在M大于1的情况下，网络设备可以采用比特指示这M种优先级。
频率优先级也可以包括一个频率列表。频率列表中不同频率可以对应不同的优先级，也可以对应相同的优先级。示例性的这个频率列表可以如表1和表2所示：
表1
表2
上述N、A、B为大于或等于1的整数。
图8对应的通信方法可以单独使用，也可以与图6和/或图7对应的通信方法结合使用。在结合使用的情况下，频率优先级中第一小区对应的频率的优先级可以为最高的优先级，有利于第一终端设备优先选择第一小区，可以避免组播业务中断，以及降低第一终端设备的能耗。
在结合使用的情况下，网络设备可以将在RRC非连接态接收组播的终端设备集中到特定的频率上，比如集中到能够提供RRC非连接态组播业务的频率/小区上。一方面，可以避免终端设备选择到不支持RRC非连接态组播业务的小区上导致组播中断的情况。不支持RRC非连接态组播业务的小区，可以包括支持该组播业务但仅支持在RRC连接态提供该组播业务的小区，也可以包括不能提供该组播业务的小区，在前者情况下终端设备在驻留到该小区后需要触发请求建立RRC连接以进入到RRC连接态接收组播业务，这会导致组播业务的中断；在后者情况下终端设备在驻留到该小区后也需要触发请求建立RRC连接，在进入RRC连接态后，终端设备可以触发与组播服务器建立单播PDU会话来接收组播业务。另一方面，可以避免终端 设备进行盲小区选择，从而可以降低终端设备的功耗开销。又一方面，从网络的角度也有利于节约网络功耗，节约网络提供RRC非连接态组播业务的资源开销和信令开销。比如网络可以仅在特定的频率/小区上提供RRC非连接态组播业务，在其他小区上无需提供RRC非连接态组播业务。
在其他场景下，网络设备可以针对相应地需求，将满足需求的小区对应的频率的优先级确定为较高的优先级。
应理解，上述不同实施例或不同位置的相同或相应的信息在某些情况下，可以相互参考。
应理解，上述通信方法中由网络设备执行的功能也可以由网络设备中的模块(例如，芯片)来执行，还可以由能实现全部或部分网络设备功能的逻辑模块或软件来执行。由终端设备执行的功能也可以由终端设备中的模块(例如，芯片)来执行，还可以由能实现全部或部分终端设备功能的逻辑模块或软件来执行。
基于上述网络架构，请参阅图9，图9是本申请实施例公开的一种通信装置的结构示意图。如图9所示，该通信装置可以处理单元901和收发单元902。
在一种情况下，该通信装置可以是终端设备，也可以是支持该终端设备实现该方法的芯片、芯片***、或处理器，还可以是能实现全部或部分终端设备功能的逻辑模块或软件。上述处理单元901和收发单元902详细描述可以参考发明内容中第七方面的记载。有关上述处理单元901和收发单元902更详细的描述可以直接参考上述图6-图8所示的方法实施例中第一终端设备的相关描述直接得到，这里不加赘述。
在另一种情况下，该通信装置可以是网络设备，也可以是支持该网络设备实现该方法的芯片、芯片***、或处理器，还可以是能实现全部或部分网络设备功能的逻辑模块或软件。上述处理单元901和收发单元902详细描述可以参考发明内容中第八方面的记载。有关上述处理单元901和收发单元902更详细的描述可以直接参考上述图6-图8所示的方法实施例中网络设备的相关描述直接得到，这里不加赘述。
在又一种情况下，该通信装置可以是终端设备，也可以是支持该终端设备实现该方法的芯片、芯片***、或处理器，还可以是能实现全部或部分终端设备功能的逻辑模块或软件。上述处理单元901和收发单元902详细描述可以参考发明内容中第九方面的记载。有关上述处理单元901和收发单元902更详细的描述可以直接参考上述图7所示的方法实施例中第一终端设备的相关描述直接得到，这里不加赘述。
在又一种情况下，该通信装置可以是网络设备，也可以是支持该网络设备实现该方法的芯片、芯片***、或处理器，还可以是能实现全部或部分网络设备功能的逻辑模块或软件。上述处理单元901和收发单元902详细描述可以参考发明内容中第十方面的记载。有关上述处理单元901和收发单元902更详细的描述可以直接参考上述图7所示的方法实施例中网络设备的相关描述直接得到，这里不加赘述。
在又一种情况下，该通信装置可以是终端设备，也可以是支持该终端设备实现该方法的芯片、芯片***、或处理器，还可以是能实现全部或部分终端设备功能的逻辑模块或软件。上述处理单元901和收发单元902详细描述可以参考发明内容中第十一方面的记载。有关上述处理单元901和收发单元902更详细的描述可以直接参考上述图8所示的方法实施例中第一终端设备的相关描述直接得到，这里不加赘述。
在又一种情况下，该通信装置可以是网络设备，也可以是支持该网络设备实现该方法的芯片、芯片***、或处理器，还可以是能实现全部或部分网络设备功能的逻辑模块或软件。上述处理单元901和收发单元902详细描述可以参考发明内容中第十二方面的记载。有关上述处理单元901和收发单元902更详细的描述可以直接参考上述图8所示的方法实施例中网络设备的相关描述直接得到，这里不加赘述。
基于上述网络架构，请参阅图10，图10是本申请实施例公开的另一种通信装置的结构示意图。如图10所示，该通信装置可以包括处理器1001、存储器1002、收发器1003和总线1004。存储器1002可以是独立存在的，可以通过总线1004与处理器1001相连接。存储器1002也可以和处理器1001集成在一起。其中，总线1004用于实现这些组件之间的连接。在一种情况下，如图10所示，收发器1003可以包括发射机10031、接收机10032和天线10033。在另一种情况下，收发器1003可以包括发射器(即输出接口)和接收器(即输入接口)。发射器可以包括发射机和天线，接收器可以包括接收机和天线。
该通信装置可以为终端设备，也可以为终端设备中的模块。存储器1002中存储的计算机程序指令被执行时，该处理器1001用于执行上述实施例中处理单元901执行的操作，收发器1003用于执行上述实施例中收发单元902执行的操作。上述通信装置还可以用于执行上述图6-图8方法实施例中第一终端设备执行的各种方法，不再赘述。
该通信装置可以为网络设备，也可以为网络设备中的模块。存储器1002中存储的计算机程序指令被执 行时，该处理器1001用于执行上述实施例中处理单元901执行的操作，收发器1003用于执行上述实施例中收发单元902执行的操作。上述通信装置还可以用于执行上述图6-图8方法实施例中网络设备执行的各种方法，不再赘述。
基于上述网络架构，请参阅图11，图11是本申请实施例公开的又一种通信装置的结构示意图。如图11所示，该通信装置可以包括输入接口1101、逻辑电路1102和输出接口1103。输入接口1101与输出接口1103通过逻辑电路1102相连接。其中，输入接口1101用于接收来自其它通信装置的信息，输出接口1103用于向其它通信装置输出、调度或者发送信息。逻辑电路1102用于执行除输入接口1101与输出接口1103的操作之外的操作，例如实现上述实施例中处理器1001实现的功能。其中，该通信装置可以为终端设备(或终端设备内的模块)，也可以为网络设备(或网络设备内的模块)。其中，有关输入接口1101、逻辑电路1102和输出接口1103更详细的描述可以直接参考上述方法实施例中第一终端设备和网络设备的相关描述直接得到，这里不加赘述。
本申请实施例还公开一种计算机可读存储介质，其上存储有指令，该指令被执行时执行上述方法实施例中的方法。
本申请实施例还公开一种包括指令的计算机程序产品，该指令被执行时执行上述方法实施例中的方法。
本申请实施例还公开一种通信***，该通信***可以包括网络设备和终端设备，具体描述可以参考图6-图8所示的通信方法。
以上所述的具体实施方式，对本申请的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本申请的具体实施方式而已，并不用于限定本申请的保护范围，凡在本申请的技术方案的基础之上，所做的任何修改、等同替换、改进等，均应包括在本申请的保护范围之内。

Claims (31)

  1. 一种通信方法，其特征在于，所述方法应用于终端设备，包括：
    在无线资源控制RRC连接态接收来自网络设备的第一信息，所述第一信息指示所述终端设备在RRC非连接态接收组播业务；
    进入RRC非连接态；
    在RRC非连接态通过第一小区接收组播业务，所述第一小区为所述终端设备在RRC连接态的服务小区。
  2. 根据权利要求1所述的方法，其特征在于，所述终端设备由RRC连接态进入RRC非连接态不执行小区选择。
  3. 根据权利要求2所述的方法，其特征在于，所述不执行小区选择包括：
    在所述第一小区满足驻留条件的情况下，驻留小区为所述第一小区。
  4. 根据权利要求1-3任一项所述的方法，其特征在于，所述第一信息携带在RRC释放消息中，所述进入RRC非连接态包括：
    根据所述RRC释放消息进入RRC非连接态。
  5. 根据权利要求1-4任一项所述的方法，其特征在于，所述第一信息指示所述组播业务的标识，或组播广播业务无线承载MRB的标识，所述MRB为所述组播业务关联的MRB。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述网络设备的第一配置信息，所述第一配置信息用于配置所述终端设备在RRC非连接态接收组播业务；
    所述在RRC非连接态通过第一小区接收组播业务包括：
    根据所述第一配置信息在RRC非连接态通过第一小区接收组播业务。
  7. 根据权利要求1-6任一项所述的方法，其特征在于，所述方法还包括：
    向所述网络设备发送第二信息，所述第二信息用于指示支持在RRC非连接态接收组播业务。
  8. 一种通信方法，其特征在于，所述方法应用于网络设备，包括：
    向处于无线资源控制RRC连接态的终端设备发送第一信息，所述第一信息指示所述终端设备在RRC非连接态接收组播业务，所述第一信息用于所述终端设备在RRC非连接态通过第一小区接收组播业务，所述第一小区为所述终端设备在RRC连接态的驻留小区。
  9. 根据权利要求8所述的方法，其特征在于，所述第一信息还用于所述终端设备由RRC连接态进入RRC非连接态不执行小区选择。
  10. 根据权利要求9所述的方法，其特征在于，所述不执行小区选择包括：
    在所述第一小区满足驻留条件的情况下，驻留小区为所述第一小区。
  11. 根据权利要求8-10任一项所述的方法，其特征在于，所述第一信息携带在RRC释放消息中，所述RRC释放消息用于所述终端设备进入RRC非连接态。
  12. 根据权利要求8-11任一项所述的方法，其特征在于，所述第一信息指示所述组播业务的标识，或组播广播业务无线承载MRB的标识，所述MRB为所述组播业务关联的MRB。
  13. 根据权利要求8-12任一项所述的方法，其特征在于，所述方法还包括：
    向所述终端设备发送第一配置信息，所述第一配置信息用于配置所述终端设备在RRC非连接态接收组播业务。
  14. 根据权利要求8-13任一项所述的方法，其特征在于，所述方法还包括：
    接收来自所述终端设备的第二信息，所述第二信息用于指示支持在RRC非连接态接收组播业务。
  15. 一种通信装置，其特征在于，所述装置应用于终端设备，包括：
    收发单元，用于在无线资源控制RRC连接态接收来自网络设备的第一信息，所述第一信息指示所述终端设备在RRC非连接态接收组播业务；
    处理单元，用于进入RRC非连接态；
    所述处理单元，还用于在RRC非连接态通过第一小区接收组播业务，所述第一小区为所述终端设备在RRC连接态的服务小区。
  16. 根据权利要求15所述的装置，其特征在于，所述终端设备由RRC连接态进入RRC非连接态不执行 小区选择。
  17. 根据权利要求16所述的装置，其特征在于，所述不执行小区选择包括：
    在所述第一小区满足驻留条件的情况下，驻留小区为所述第一小区。
  18. 根据权利要求15-17任一项所述的装置，其特征在于，所述第一信息携带在RRC释放消息中，所述处理单元进入RRC非连接态包括：
    根据所述RRC释放消息进入RRC非连接态。
  19. 根据权利要求15-18任一项所述的装置，其特征在于，所述第一信息指示所述组播业务的标识，或组播广播业务无线承载MRB的标识，所述MRB为所述组播业务关联的MRB。
  20. 根据权利要求15-19任一项所述的装置，其特征在于，所述收发单元，还用于接收来自所述网络设备的第一配置信息，所述第一配置信息用于配置所述终端设备在RRC非连接态接收组播业务；
    所述处理单元在RRC非连接态通过第一小区接收组播业务包括：
    根据所述第一配置信息在RRC非连接态通过第一小区接收组播业务。
  21. 根据权利要求15-20任一项所述的装置，其特征在于，所述收发单元，还用于向所述网络设备发送第二信息，所述第二信息用于指示支持在RRC非连接态接收组播业务。
  22. 一种通信装置，其特征在于，所述装置应用于网络设备，包括处理单元和收发单元，其中：
    所述收发单元，用于在所述处理单元的控制下向处于无线资源控制RRC连接态的终端设备发送第一信息，所述第一信息指示所述终端设备在RRC非连接态接收组播业务，所述第一信息用于所述终端设备在RRC非连接态通过第一小区接收组播业务，所述第一小区为所述终端设备在RRC连接态的驻留小区。
  23. 根据权利要求22所述的装置，其特征在于，所述第一信息还用于所述终端设备由RRC连接态进入RRC非连接态不执行小区选择。
  24. 根据权利要求23所述的装置，其特征在于，所述不执行小区选择包括：在所述第一小区满足驻留条件的情况下，驻留小区为所述第一小区。
  25. 根据权利要求22-24任一项所述的装置，其特征在于，所述第一信息携带在RRC释放消息中，所述RRC释放消息用于所述终端设备进入RRC非连接态。
  26. 根据权利要求22-25任一项所述的装置，其特征在于，所述第一信息指示所述组播业务的标识，或组播广播业务无线承载MRB的标识，所述MRB为所述组播业务关联的MRB。
  27. 根据权利要求22-26任一项所述的装置，其特征在于，所述收发单元，还用于在所述处理单元的控制下向所述终端设备发送第一配置信息，所述第一配置信息用于配置所述终端设备在RRC非连接态接收组播业务。
  28. 根据权利要求22-27任一项所述的装置，其特征在于，所述收发单元，还用于在所述处理单元的控制下接收来自所述终端设备的第二信息，所述第二信息用于指示支持在RRC非连接态接收组播业务。
  29. 一种通信装置，其特征在于，包括处理器、存储器，所述处理器和存储器耦合，所述处理器调用所述存储器中存储的计算机程序实现如权利要求1-14任一项所述的方法。
  30. 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计算机程序或计算机指令，当所述计算机程序或计算机指令被处理器运行时，实现如权利要求1-14任一项所述的方法。
  31. 一种计算机程序产品，其特征在于，所述计算机程序产品包括计算机程序代码，当所述计算机程序代码被处理器运行时，实现如权利要求1-14任一项所述的方法。
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