WO2021185136A1 - Method and apparatus for updating configuration information - Google Patents

Abstract

Disclosed in embodiments of the present application are a method and apparatus for updating configuration information. The method comprises: a first network device first sends paging information, the first indication information included in the paging information being used for indicating that broadcast multicast service configuration information has been updated; then, sends the broadcast multicast service configuration information. Thus, terminal devices in a connected state, an idle state, and an inactive state can all learn that the broadcast multicast service configuration information has been updated, and receive the broadcast multicast service configuration information. In the embodiments of the present application, the terminal devices in the idle state and the inactive state can obtain updated broadcast multicast service configuration information without entering the connected state, thereby reducing the power consumption of the terminals and improving the utilization rate of network resources.

Description

Method and device for updating configuration information

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office, the application number is 202010195496.8, and the application name is "Configuration Information Update Method and Device" on March 19, 2020, the entire content of which is incorporated into this application by reference.

Technical field

This application relates to the field of communication technology, and in particular to a method and device for updating configuration information.

Background technique

Broadcasting networks, such as radio broadcasting and TV broadcasting networks, provide the same content to a large number of users over a large coverage area. It does not serve a single user, so it is very different from traditional unicast services.

The broadcast network has the following salient features: a large coverage area; users in the coverage area receive the same content at the same time; the wireless access network does not track the user's movement, that is, it does not care where the user is. Receiving broadcast content (Note: New Radio (NR) Multimedia Broadcast Multicast Services (MBMS) may need to consider mobility management); users do not need or notify the network when receiving content (NR's MBMS) A hybrid automatic repeat request (Hybrid Automatic Repeat reQuest, HARQ) feedback may be required.

MBMS supports the provision of a multicast/broadcast network in a cellular system, thereby realizing simultaneous provision of multicast/broadcast and unicast services in a single network. The 3rd generation partnership project (3GPP) has established a new project NR_MBS in Release-17 (Release-17, R-17 for short), with the goal of supporting MBMS services in NR. Mainly targeted services include public safety and mission critical (public safety and mission critical), car networking applications (V2X applications), multicast service transparent transmission (transparent IPv4/IPv6 multicast delivery), and wireless software delivery (software delivery over wireless) , Multicast communication (group communications) and IoT applications (IoT applications), etc. An important scope of this project is to support service continuity when the terminal is moving for user equipment (UE) in a connected state, and to receive MBMS services for a UE in an inactive state.

For MBMS, security issues must also be considered, such as authentication and encryption of MBMS services. The MBMS service network may need to update related configurations, such as security algorithms, keys, resources for sending MBMS, and modulation and coding strategy (Modulation and Coding Scheme, MCS) information used. For the connected UE, MBMS-related configuration, including security-related configuration, can be notified in time through unicast connection and sent to the UE. For UEs in an inactive state (idle state or inactive state), how to obtain MBMS-related configuration information in time is a problem that needs to be solved.

Summary of the invention

The embodiment of the application discloses a method and device for updating configuration information, and a terminal device in an inactive state can obtain configuration information related to MBMS in time.

In the first aspect, an embodiment of the present application provides a configuration information update method. The method includes: a first network device sends paging information, the paging information includes first indication information, and the first indication information is used for Indicates that the broadcast and multicast service configuration information has been updated; the first network device sends the broadcast and multicast service configuration information. Since terminal devices in the idle state, inactive state, and active state can all receive paging information, the first indication information carried by the paging information can indicate that the terminal devices in the inactive state, idle state, and active state broadcast multiple messages. The broadcast service configuration information has been updated, and the broadcast and multicast service configuration information is sent.

In the embodiment of the present application, the first network device instructs the broadcast and multicast service configuration information to be updated through the paging information, and can notify the MBMS configuration update in time, and the terminal device can learn that the broadcast and multicast service configuration information is updated without entering the connected state.

In a possible implementation manner, the first indication information is used to indicate at least one broadcast multicast service whose configuration information has been updated. The first indication information may only indicate that the configuration information of the broadcast and multicast service is updated, or may only indicate that the configuration information is updated, or that the configuration information of the broadcast and multicast service is updated at the same time, and that the configuration information is updated. Broadcast and multicast services.

In this implementation manner, the first indication information is used to indicate that at least one type of broadcast and multicast service configuration information has been updated, and/or indicate that the configuration information has been updated for the broadcast and multicast service, so as to facilitate the sense of the updated broadcast and multicast service. The interested terminal device responds to the paging information carrying the first indication information, and then sends the broadcast multicast service configuration information in a targeted manner.

There are two types of paging information. One type is the paging information carried in the data channel (for example, the physical downlink shared channel (PDSCH)). This type is mainly service paging (the so-called service paging). The network has services to send, and the specific UE needs to be paged, which will carry the identity of the UE. The first type is the paging information carried in the control channel (for example, the physical downlink control channel (PDCCH)). It is Earthquake and Tsunami Warning System (ETWS), Commercial Mobile Alert System (CMAS), etc., which is short message (short message), or direct indication information in LTE. .

In this implementation, two formats of the first indication information are provided, one is a short message (corresponding to the paging information in the control channel) transmitted through the physical downlink control channel, and the other is through the physical downlink shared channel The transmitted system message update indication (corresponding to the paging information in the data channel). The reserved bits of the short message are used to indicate that the configuration information of the broadcast and multicast service has been updated, the reserved bits can be effectively used, and the existing communication system is compatible. The system message update indication information transmitted through the physical downlink shared channel indicates that the broadcast multicast service configuration information has been updated, which can reduce the occupation of the control channel.

In a possible implementation, the first indication information is a short message transmitted through a physical downlink control channel; a reserved bit in the short message indicates that the broadcast multicast service configuration information has been updated, or the short message The system message update indication in is used to indicate that the broadcast and multicast service configuration information has been updated. In other words, the reserved bits in the short message indicate that the broadcast and multicast configuration information has been updated, or the system message update indication in the short message is used to indicate that the broadcast and multicast configuration information has been updated. . When the system message update indication in the short message is used to indicate that the broadcast and multicast configuration information has been updated, it may be the system message update indication in the short message to indicate that the system message is updated, including the bearer broadcast and multicast configuration Information system news update. Exemplarily, when the third bit in the short message is 0, it indicates that the broadcast and multicast configuration information has been updated, and when the third bit is 0, it indicates that the broadcast and multicast configuration information has not been updated. Exemplarily, a newly defined system information block (corresponding to the system message update indication) in the short message indicates that the broadcast and multicast configuration information has been updated or not.

In this implementation manner, the reserved bits in the short message or the system message update indication are used to indicate that the broadcast multicast service configuration information has been updated, and the system compatibility is strong.

In a possible implementation manner, the reserved bit or the system message update indication includes multiple bits, each bit corresponds to a broadcast multicast service, and the multiple bits are used to indicate that the configuration information has been updated at least A broadcast and multicast service. Exemplarily, reserved bits or system message update instructions are N bits, where N is the number of MBMS services, and one bit corresponds to one MBMS service. If the bit corresponding to a certain MBMS service is flipped, it is considered the configuration of the MBMS service An update has occurred.

In this implementation manner, multiple bits are used to indicate at least one broadcast multicast service whose configuration information has been updated, which is simple to implement and has low resource overhead.

In a possible implementation manner, the sending of the broadcast multicast service configuration information by the first network device includes: the first network device sending downlink control information or a physical downlink control channel ( For example, PDCCH), or the first network device sends a system message block that carries the configuration information of the broadcast and multicast service. The first network device can send the broadcast and multicast service configuration information in any of the following ways: 1. It is directly carried in the downlink control information; 2. The broadcast and multicast service configuration information is carried through a separate system message block; 3. The fields in the system message block carry broadcast and multicast service configuration information.

In this implementation manner, the first network device can send the broadcast and multicast service configuration information in different ways, with multiple usage scenarios and strong flexibility.

In a possible implementation manner, before the first network device sends the paging information, the method further includes: the first network device receives a broadcast multicast service configuration information update instruction of the second network device, and the broadcast multicast service The service configuration information update indication is used to indicate that the broadcast and multicast service configuration information needs to be updated.

In this implementation manner, the first network device responds to the broadcast and multicast service configuration information update instruction from the second network device, so as to notify the terminal device that the broadcast and multicast service configuration information has been updated in time.

In a possible implementation, the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the paging information to at least one terminal device that is interested in the updated broadcast multicast service configuration information Or, the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the paging information to all terminal devices. The terminal device that is interested in the updated broadcast and multicast service configuration information can be a terminal device that needs to update the broadcast and multicast service configuration information, or it can be a terminal device that has a need for broadcast and multicast services. Exemplarily, the broadcast-multicast service configuration information update indication carries at least one identification of a terminal device that is interested in the updated broadcast-multicast service configuration information.

In this implementation manner, the broadcast and multicast service configuration information update instruction can meet the requirements of different scenarios. It can either instruct the first network device to send paging information to terminal devices that are interested in the updated broadcast and multicast service configuration information, or it can Instruct the first network device to send paging information to all terminal devices.

In a possible implementation manner, the broadcast multicast service configuration information update indication is also used to indicate at least one broadcast multicast service whose configuration information has been updated. Exemplarily, the broadcast-multicast service configuration information update indication includes multiple bits, each bit corresponds to one type of broadcast-multicast service, and the multiple bits are used to indicate at least one type of broadcast-multicast service whose configuration information has been updated.

In this implementation manner, the broadcast-multicast service configuration information update indication is used to indicate at least one broadcast-multicast service whose configuration information has been updated, so that the first network device can send it to terminal devices interested in the updated broadcast-multicast service. The paging information carrying the first indication information can send the broadcast multicast service configuration information in a targeted manner.

In a possible implementation manner, the sending of the broadcast multicast service configuration information by the first network device includes: the first network device sends the multicast data scrambled by the group radio network temporary identifier G-RNTI to the listening group The multicast data includes broadcast-multicast service configuration information encrypted by using the multicast key of the broadcast-multicast service.

In this implementation, the encrypted broadcast and multicast service configuration information is sent to the terminal equipment monitoring multicast through the multicast data scrambled by G-RNTI, and the broadcast and multicast service configuration information can be sent to the broadcast and multicast service in time. Interested terminal equipment, and high security.

In a possible implementation manner, the sending of the broadcast and multicast service configuration information by the first network device includes: in the case that the first network device stores the cell radio network temporary identifier C-RNTI of the terminal device, passing The C-RNTI sends the encrypted broadcast multicast service configuration information to the terminal device. In this implementation, the terminal device may be in an inactive state. In some embodiments, the encrypted broadcast and multicast service configuration information is obtained by encrypting the broadcast and multicast service configuration information using the unicast key of the access layer AS of the terminal device.

In the implementation manner, the encrypted broadcast and multicast service configuration information is sent to the terminal device through the C-RNTI, with low signaling consumption and high security.

In a possible implementation manner, the sending of the broadcast-multicast service configuration information by the first network device includes: the first network device sending a non-access stratum NAS message containing the broadcast-multicast service configuration information. In this implementation manner, the terminal device may be in an inactive state or an idle state. Since the terminal device that is not in the disconnected state can receive and parse the NAS message, and then obtain the broadcast and multicast service configuration information, the broadcast and multicast service configuration information is carried by the NAS message.

In this implementation manner, the first network device sends a non-access stratum NAS message containing broadcast and multicast service configuration information, so that terminal devices that are not in a disconnected state can obtain the broadcast and multicast service configuration information.

In a possible implementation manner, before the first network device sends the broadcast multicast service configuration information, the method further includes: the first network device sends request information to the second network device, and the request information requests the The second network device generates a NAS message including the broadcast and multicast service configuration information; the first network device receives the NAS message including the broadcast and multicast service configuration information sent by the second network device. In this implementation manner, the NAS message contains the broadcast multicast service configuration information encrypted using the non-access stratum NAS key of the terminal device.

In this implementation manner, the second network device is requested to generate the NAS message of the broadcast and multicast service configuration information, so as to send the NAS message containing the broadcast and multicast service configuration information to the terminal device.

Of course, the first network device may also send request information to the second network device, and the request information requests the second network device to generate other messages that include broadcast and multicast service configuration information, so as to send to terminal devices that include broadcast information. Multicast service configuration channel other messages.

In a possible implementation manner, the sending of the paging information by the first network device includes: the first network device sending the paging information carrying the cell radio network temporary identifier C-RNTI of the terminal device; The sending of broadcast and multicast service configuration information by a network device includes: sending the encrypted broadcast and multicast service configuration information to the terminal device through the C-RNTI.

In this implementation manner, the encrypted broadcast and multicast service configuration information is sent to the terminal device through the C-RNTI of the terminal device, which can reduce unnecessary data transmission and is highly reliable.

In the second aspect, the embodiments of the present application provide another configuration information update method. The method includes: a terminal device receives paging information, the paging information includes first indication information, and the first indication information is used to indicate The broadcast and multicast service configuration information has been updated; the terminal device receives the broadcast and multicast service configuration information. The terminal device is in any of an active state, an inactive state, and an idle state. It should be understood that a terminal device in an idle state or an inactive state can learn that the broadcast and multicast service configuration information has been updated according to the received paging information, and receive the broadcast and multicast service configuration information.

In the embodiment of the present application, the terminal device can learn that the broadcast and multicast service configuration information has been updated without entering the connected state, and receive the broadcast and multicast service configuration information, which can reduce power consumption.

In a possible implementation manner, the first indication information indicates at least one broadcast multicast service whose configuration information has been updated.

In this implementation manner, the first indication information is used to indicate at least one broadcast multicast service whose configuration information has been updated, so that terminal devices interested in the updated broadcast multicast service can respond to the request carrying the first indication information. Call information, and then send broadcast and multicast service configuration information in a targeted manner.

In a possible implementation manner, the first indication information is a short message transmitted through a physical downlink control channel, or the first indication information is a system message update indication transmitted through a physical downlink shared channel.

In this implementation manner, two implementation forms of the first indication information are provided, both of which can be better compatible with the existing communication system.

In a possible implementation, the first indication information is a short message transmitted through a physical downlink control channel; a reserved bit in the short message indicates that the broadcast multicast service configuration information has been updated, or the short message The system message update indication in is used to indicate that the broadcast multicast service configuration information has been updated.

In this implementation manner, the reserved bits in the short message or the system message update indication are used to indicate that the broadcast multicast service configuration information has been updated, and the system compatibility is strong.

In a possible implementation manner, the reserved bit or the system message update indication includes multiple bits, each bit corresponds to a broadcast multicast service, and the multiple bits are used to indicate that the configuration information has been updated at least A broadcast and multicast service.

In this implementation manner, multiple bits are used to indicate the broadcast multicast service whose configuration information has been updated, which is simple to implement and has low resource overhead.

In a possible implementation manner, after the terminal device receives the paging information, the method further includes: the terminal device responds to the paging information when the broadcast multicast service configuration information needs to be updated; The terminal device does not respond to the paging information when there is no need to update the broadcast and multicast service configuration information.

In this implementation manner, the terminal device responds to the paging information when it needs to update the broadcast and multicast service configuration information, so that the first network device sends the broadcast and multicast service configuration information in a targeted manner, which can reduce resource overhead.

In a possible implementation manner, the terminal device is in any one of an active state, an idle state, and an inactive state.

In this implementation manner, terminal devices in any state can obtain updated broadcast and multicast service configuration information.

In a possible implementation, the terminal device receiving the broadcast-multicast service configuration information includes: the terminal device that monitors the multicast receives the signal sent by the first network device that is scrambled by the G-RNTI of the group radio network temporary identifier. Multicast data, where the multicast data includes broadcast-multicast service configuration information encrypted using a multicast key of the broadcast-multicast service.

In this implementation manner, the terminal device obtains updated broadcast-multicast service configuration information from the monitored multicast data, with low resource overhead and high security.

In a possible implementation, the terminal device receiving the broadcast multicast service configuration information includes: the terminal device receiving the encrypted broadcast multicast service configuration information sent by the first network device through the cell radio network temporary identifier C-RNTI. In this implementation manner, the encrypted broadcast and multicast service configuration information is obtained by encrypting the broadcast and multicast service configuration information using the unicast key of the access layer AS of the terminal device.

In the implementation manner, the encrypted broadcast and multicast service configuration information is sent to the terminal device through the C-RNTI, with low signaling consumption and high security.

In a possible implementation manner, the terminal device receiving the broadcast multicast service configuration information includes: the terminal device receiving the non-access stratum NAS message including the encrypted broadcast multicast service configuration information. In this implementation manner, the encrypted broadcast and multicast service configuration information is obtained by encrypting the broadcast and multicast service configuration information using the non-access stratum NAS key of the terminal device.

In this implementation manner, the encrypted NAS message is used to carry the broadcast and multicast service configuration information, so that the terminal device in a disconnected state can receive the broadcast and multicast service configuration information, and the security is high.

In the third aspect, the embodiments of the present application provide another configuration information update method. The method includes: a second network device generates a broadcast multicast service configuration information update instruction, and the broadcast multicast service configuration information update instruction is used to indicate broadcast The multicast service configuration information has been updated; the second network device sends the broadcast multicast service configuration information update instruction.

In this embodiment of the application, the second network device sends a broadcast-multicast service configuration information update instruction, so that the first network device responds to the broadcast-multicast service configuration information update instruction, and then indicates that the broadcast-multicast service configuration information has been completed through paging information. renew.

In a possible implementation manner, the broadcast multicast service configuration information update indication is used to indicate at least one broadcast multicast service whose configuration information has been updated.

In this implementation manner, the broadcast-multicast service configuration information update indication is used to indicate at least one type of broadcast-multicast service whose configuration information has been updated, so that the first network device can provide information to terminal devices interested in the updated broadcast-multicast service. Send paging information, and then send paging information more targeted.

In a possible implementation manner, the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the first instruction to at least one terminal device that is interested in the updated broadcast multicast service configuration information Information paging information, or the broadcast multicast service configuration information update instruction is used to instruct the first network device to send paging information carrying first instruction information to all terminal devices; the first instruction information is used Indicates that the broadcast and multicast service configuration information has been updated.

In this implementation manner, the broadcast and multicast service configuration information update instruction can meet the requirements of different scenarios. It can either instruct the first network device to send paging information to terminal devices that are interested in the updated broadcast and multicast service configuration information, or it can Instruct the first network device to send paging information to all terminal devices.

In the fourth aspect, the embodiments of the present application provide another configuration information update method, the method includes: the terminal device sends a broadcast-multicast service configuration information update request in the first message of the random access process, and the broadcast-multicast service configuration information update request is The service configuration information update request is used to request to update the broadcast and multicast service configuration information; the terminal device receives the broadcast and multicast service configuration information.

The reception of the broadcast and multicast service configuration information by the terminal device may be that the terminal device receives the broadcast and multicast service configuration information before entering the connected state. In other words, the terminal equipment in the idle state or in the inactive state can actively obtain the updated broadcast and multicast service configuration information.

In the embodiment of the present application, the terminal device in the inactive state or the idle state can obtain updated MBMS configuration information in time, which can reduce the power consumption of the terminal device and improve the efficiency of network resources.

In a possible implementation, the reserved bit in the first message indicates the broadcast multicast service configuration information to be updated by the terminal device, or the bitmap in the first message indicates that the terminal device is waiting to be updated. For the updated broadcast and multicast service configuration information, the bits in the bitmap have a corresponding relationship with the broadcast and multicast service configuration information.

Using the reserved bits of the first message in the random access process to indicate the broadcast-multicast service configuration information update request can effectively use the reserved bits and be compatible with the existing communication system. The bitmap in the first message indicates the broadcast and multicast service configuration information to be updated by the terminal device, and the resource overhead is small.

In a possible implementation manner, the first message is the first message or the third message in the random access process.

In this implementation, the broadcast multicast service configuration information update request is sent through the first message or the third message in the random access process, which can make full use of the first message or the third message in the random access process. , It can be well compatible with the existing random access process.

In a possible implementation manner, the first message is the third message in the random access process, and the reception of the broadcast multicast service configuration information by the terminal device includes: the terminal device passes the first message in the random access process. Four messages receive the broadcast and multicast service configuration information.

In this implementation manner, the broadcast and multicast service configuration information is received through the fourth message in the random access process, and the broadcast and multicast service configuration information can be received during the random access process, and the terminal device is not required to enter the connected state.

In a possible implementation, the first message includes a non-access stratum NAS message or the radio resource control RRC message included in the first message includes a NAS message, and the NAS message includes using the terminal device NAS key encrypted broadcast and multicast service configuration information.

In this implementation manner, the broadcast and multicast service configuration information is encrypted using the NAS key of the terminal device, and the encrypted broadcast and multicast service configuration information is sent through the NAS message, which has high security.

In a possible implementation manner, the first message carries broadcast and multicast service configuration information encrypted with a password of the access layer AS of the terminal device, and the terminal device is in an inactive state.

In this implementation, corresponding to the terminal device in the inactive state, the first message of the random access process is used to send the terminal device the broadcast and multicast service configuration information encrypted with the password of the access layer AS of the terminal device. The activated terminal device can obtain the broadcast and multicast service configuration information in time.

In a possible implementation manner, receiving the broadcast and multicast service configuration information by the terminal device includes: the terminal device receiving the broadcast and multicast service configuration information carried by a radio resource control RRC message. The terminal device in the non-connected state can receive and analyze the RRC group, and carry the broadcast and multicast service configuration information through the RRC message, so that the terminal device can obtain the broadcast and multicast service configuration information through the RRC message without entering the connected state.

In this implementation manner, the terminal device in the non-connected state obtains the broadcast and multicast service configuration information through the RRC message, and the terminal device does not have to enter the connected state, which can save power consumption.

In a possible implementation manner, the receiving, by the terminal device, the broadcast-multicast service configuration information carried in an RRC message includes: the terminal device receiving the RRC message sent by the first network device in a broadcast-multicast manner.

In this implementation manner, for the RRC message sent by the first network device in a broadcast-multicast manner, there is no need to establish a connection between the first network device and the terminal device, and the signaling overhead is small.

In a possible implementation manner, the method further includes: the terminal device receiving indication information for instructing the terminal device to enter a non-connected state.

After receiving the indication information indicating that the terminal device enters the non-connected state, the terminal device can enter the non-connected state, so as to save power consumption.

In a fifth aspect, the embodiments of the present application provide yet another configuration information update method, the method includes: a first network device receives a broadcast multicast service configuration information update request in a first message of a random access process; A network device sends the broadcast and multicast service configuration information in response to the broadcast and multicast service configuration information update request.

In the embodiment of the present application, the first network device receives the broadcast-multicast service configuration information update request in the first message of the random access process, and responds to the broadcast-multicast service configuration information update request, and sends the broadcast-multicast service configuration information ; Can make the terminal device obtain the broadcast and multicast service configuration information before entering the connected state.

In a possible implementation, the reserved bit in the first message indicates the broadcast multicast service configuration information to be updated by the terminal device, or the bitmap in the first message indicates that the terminal device is waiting to be updated. For the updated broadcast and multicast service configuration information, the bits in the bitmap have a corresponding relationship with the broadcast and multicast service configuration information.

In this implementation manner, the configuration information of the broadcast and multicast service to be updated by the terminal device is indicated by reserved bits or bitmaps, which consumes less bits and is simple to implement.

In a possible implementation manner, the first message is the first message or the third message in the random access process.

In this implementation, the broadcast multicast service configuration information update request is sent through the first message or the third message in the random access process, which can make full use of the first message or the third message in the random access process. , It can be well compatible with the existing random access process.

In a possible implementation manner, the first message is the third message in the random access process; the sending of the broadcast multicast service configuration information by the first network device includes: the first network device uses random access The fourth message in the process sends the broadcast multicast service configuration information.

In this implementation, the first network device sends the broadcast-multicast service configuration information through the fourth message in the random access process, which can be well compatible with the existing random access process, so that the terminal device does not have to enter the connected state. Can obtain broadcast and multicast service configuration information.

In a possible implementation manner, the sending of the broadcast multicast service configuration information by the first network device includes: the first network device in the first message or the radio resource control RRC message included in the first message , Sending a non-access stratum NAS message, where the NAS message includes the broadcast multicast service configuration information encrypted with the NAS key of the terminal device.

In this implementation manner, the encrypted broadcast and multicast service configuration information is sent through the NAS message, so that the terminal device that is not in the connected state can obtain the broadcast and multicast service configuration information through the NAS message, and the security is high.

In a possible implementation manner, before the first network device sends the broadcast multicast service configuration information, the method further includes: the first network device sends request information to the second network device, and the request information requests the The second network device generates a NAS message including broadcast multicast service configuration information; the first network device receives the NAS message from the second network device.

In this implementation manner, the first network device can obtain the NAS message including the broadcast and multicast service configuration information in time by sending the request information.

In a possible implementation manner, the first message carries broadcast and multicast service configuration information encrypted with a key of the access layer AS of the terminal device, and the terminal device is in an inactive state.

In a possible implementation manner, the sending of the broadcast and multicast service configuration information by the first network device includes: the first network device sending the radio resource control RRC message that carries the broadcast and multicast service configuration information.

In this implementation manner, the first network device sends an RRC message carrying configuration information of the broadcast/multicast service, so that the terminal device in a disconnected state obtains the configuration information of the broadcast/multicast service through the RRC message, which can save the power consumption of the terminal device.

In a possible implementation manner, the first network device sends the RRC message carrying the broadcast-multicast service configuration information in a broadcast-multicast manner.

In this implementation manner, the first network device sends the RRC message carrying the broadcast-multicast service configuration information in a broadcast-multicast manner, and there is no need to establish a connection between the first network device and the terminal device, and the signaling overhead is small.

In a possible implementation manner, the method further includes: the first network device sends to the terminal device indication information that instructs the terminal device to enter a disconnected state.

In this implementation manner, by sending indication information indicating that the terminal device enters the non-connected state to the terminal device, the terminal device can be made to enter the non-connected state in time, so as to save power consumption.

In a sixth aspect, an embodiment of the present application provides yet another configuration information update method. The method includes: a second network device receives request information, and the request information requests the second network device to generate a configuration information that includes broadcast and multicast service configuration information. Non-access stratum NAS message; the second network device sends a NAS message including the broadcast-multicast service configuration information.

In the embodiment of the present application, the second network device can generate and send the NAS message including the broadcast and multicast service configuration information in time.

In a seventh aspect, an embodiment of the present application provides a network device. The network device includes: a processing module configured to generate paging information, the paging information includes first indication information, and the first indication information is used for Indicates that the broadcast and multicast service configuration information has been updated; the sending module is used to send the paging information; the sending module is also used to send the broadcast and multicast service configuration information.

In a possible implementation manner, the first indication information is used to indicate at least one broadcast multicast service whose configuration information has been updated.

In a possible implementation manner, the first indication information is a short message transmitted through a physical downlink control channel, or the first indication information is a system message update indication transmitted through a physical downlink shared channel.

In a possible implementation, the first indication information is a short message transmitted through a physical downlink control channel; the first indication information is used to indicate that the broadcast multicast service configuration information has been updated, and is specifically: the short message The reserved bit in indicates that the broadcast and multicast service configuration information has been updated, or the system message update indication in the short message is used to indicate that the broadcast and multicast service configuration information has been updated.

In a possible implementation manner, the reserved bit or the system message update indication includes multiple bits, each bit corresponds to a broadcast multicast service, and the multiple bits are used to indicate that the configuration information has been updated at least A broadcast and multicast service.

In a possible implementation manner, the network device further includes: a receiving module configured to receive a broadcast and multicast service configuration information update instruction of the second network device, and the broadcast and multicast service configuration information update instruction is used to indicate the broadcast and multicast service configuration information update instruction. Broadcast service configuration information needs to be updated.

In a possible implementation, the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the paging information to at least one terminal device that is interested in the updated broadcast multicast service configuration information Or, the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the paging information to all terminal devices.

In a possible implementation manner, the broadcast multicast service configuration information update indication is also used to indicate at least one broadcast multicast service whose configuration information has been updated.

Regarding the technical effects brought about by the seventh aspect or various possible implementation manners, reference may be made to the introduction of the technical effects of the first aspect or corresponding implementation manners.

In an eighth aspect, an embodiment of the present application provides a terminal device. The terminal device includes: a receiving module configured to receive paging information, the paging information includes first indication information, and the first indication information is used for Indicates that the broadcast and multicast service configuration information has been updated; the receiving module is also used to receive the broadcast and multicast service configuration information; the processing module is used to update the current broadcast and multicast service configuration information according to the broadcast and multicast service configuration information .

In a possible implementation manner, the first indication information indicates at least one broadcast multicast service whose configuration information has been updated.

In a possible implementation manner, the first indication information is reserved bits of a short message transmitted through a physical downlink control channel, or the first indication information is system message update indication information transmitted through a physical downlink shared channel .

In a possible implementation manner, the first indication information is a short message transmitted through a physical downlink control channel, or the first indication information is a system message update indication transmitted through a physical downlink shared channel.

In a possible implementation, the first indication information is a short message transmitted through a physical downlink control channel; the first indication information is used to indicate that the broadcast multicast service configuration information has been updated, and is specifically: the short message The reserved bit in indicates that the broadcast and multicast service configuration information has been updated, or the system message update indication in the short message is used to indicate that the broadcast and multicast service configuration information has been updated.

In a possible implementation, the reserved bit or the system message update indication includes multiple bits, each bit corresponds to a broadcast multicast service, and the multiple bits are used to indicate that at least one of the configuration information has been updated. A broadcast and multicast service.

In a possible implementation, the processing module is configured to respond to the paging information when the broadcast and multicast service configuration information needs to be updated; when the broadcast and multicast service configuration information does not need to be updated, it does not respond to the paging information. Describe paging information.

In a possible implementation manner, the terminal device is in any one of an active state, an idle state, and an inactive state.

Regarding the technical effects brought about by the eighth aspect or various possible implementation manners, reference may be made to the introduction of the technical effects of the second aspect or corresponding implementation manners.

In a ninth aspect, an embodiment of the present application provides another network device, the network device includes: a processing module, configured to generate a broadcast multicast service configuration information update instruction, the broadcast multicast service configuration information update instruction is used to indicate The broadcast and multicast service configuration information has been updated; the sending module is used to send the broadcast and multicast service configuration information update instruction.

In a possible implementation manner, the broadcast multicast service configuration information update indication is used to indicate at least one broadcast multicast service whose configuration information has been updated.

In a possible implementation manner, the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the first instruction to at least one terminal device that is interested in the updated broadcast multicast service configuration information Information paging information, or the broadcast multicast service configuration information update instruction is used to instruct the first network device to send paging information carrying first instruction information to all terminal devices; the first instruction information is used Indicates that the broadcast and multicast service configuration information has been updated.

Regarding the technical effects brought about by the ninth aspect or various possible implementation manners, reference may be made to the introduction of the technical effects of the third aspect or corresponding implementation manners.

In a tenth aspect, the embodiments of the present application provide another terminal device. The terminal device includes: a sending module, configured to send a broadcast-multicast service configuration information update request in the first message of the random access process. The multicast service configuration information update request is used to request to update the broadcast and multicast service configuration information; the receiving module is also used to receive the broadcast and multicast service configuration information.

In a possible implementation, the reserved bit in the first message indicates the broadcast multicast service configuration information to be updated by the terminal device, or the bitmap in the first message indicates that the terminal device is waiting to be updated. For the updated broadcast and multicast service configuration information, the bits in the bitmap have a corresponding relationship with the broadcast and multicast service configuration information.

In a possible implementation manner, the first message is the first message or the third message in the random access process.

In a possible implementation manner, the first message is the third message in the random access process; the receiving module is specifically configured to receive the broadcast multicast through the fourth message in the random access process Business configuration information.

In a possible implementation, the first message includes a non-access stratum NAS message or the radio resource control RRC message included in the first message includes a NAS message, and the NAS message includes using the terminal device NAS key encrypted broadcast and multicast service configuration information.

In a possible implementation manner, the first message carries broadcast and multicast service configuration information encrypted with a password of the access layer AS of the terminal device, and the terminal device is in an inactive state.

In a possible implementation manner, the receiving module is specifically configured to receive the broadcast multicast service configuration information carried in a radio resource control RRC message.

In a possible implementation manner, the receiving module is specifically configured to receive the RRC message sent by the first network device in a broadcast-multicast manner.

In a possible implementation manner, the receiving module is further configured to receive indication information for instructing the terminal device to enter a disconnected state.

Regarding the technical effects brought by the tenth aspect or various possible implementation manners, reference may be made to the introduction of the technical effects of the fourth aspect or corresponding implementation manners.

In an eleventh aspect, an embodiment of the present application also provides another network device, the network device includes: a receiving module, configured to receive a broadcast multicast service configuration information update request in the first message of the random access process; The processing module is used to respond to the broadcast and multicast service configuration information update request; the sending module is used to send the broadcast and multicast service configuration information.

In a possible implementation, the reserved bit in the first message indicates the broadcast multicast service configuration information to be updated by the terminal device, or the bitmap in the first message indicates that the terminal device is waiting to be updated. For the updated broadcast and multicast service configuration information, the bits in the bitmap have a corresponding relationship with the broadcast and multicast service configuration information.

In a possible implementation manner, the first message is the first message or the third message in the random access process.

In a possible implementation, the first message is the third message in the random access process; the sending module is specifically used for the first network device to pass the fourth message in the random access process Sending the broadcast and multicast service configuration information.

In a possible implementation, the sending module is specifically configured to send the non-access stratum NAS in the first message or the radio resource control RRC message contained in the first message by the first network device Message, the NAS message includes broadcast and multicast service configuration information encrypted with the NAS key of the terminal device.

In a possible implementation, the sending module is further configured to send request information to a second network device, the request information requesting the second network device to generate a NAS message including broadcast multicast service configuration information; The receiving module is further configured to receive the NAS message from the second network device.

In a possible implementation manner, the first message carries broadcast and multicast service configuration information encrypted with a key of the access layer AS of the terminal device, and the terminal device is in an inactive state.

In a possible implementation manner, the sending module is specifically configured to send a radio resource control RRC message carrying configuration information of the broadcast multicast service.

In a possible implementation manner, the sending module is specifically configured to send the RRC message carrying the broadcast-multicast service configuration information in a broadcast-multicast manner.

In a possible implementation manner, the sending module is further configured to send indication information to the terminal device that instructs the terminal device to enter a disconnected state.

Regarding the technical effects brought about by the eleventh aspect or various possible implementation manners, reference may be made to the introduction of the technical effects of the fifth aspect or corresponding implementation manners.

In a twelfth aspect, an embodiment of the present application provides a network device, the network device includes: a receiving module, configured to receive request information, the request information requests the second network device to generate configuration information including broadcast and multicast services The non-access stratum NAS message; the sending module is used to send the NAS message including the broadcast and multicast service configuration information.

In a possible implementation manner, the broadcast multicast service configuration information update indication is used to indicate at least one broadcast multicast service whose configuration information has been updated.

In a possible implementation manner, the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the first instruction to at least one terminal device that is interested in the updated broadcast multicast service configuration information Information paging information, or the broadcast multicast service configuration information update instruction is used to instruct the first network device to send paging information carrying first instruction information to all terminal devices; the first instruction information is used Indicates that the broadcast and multicast service configuration information has been updated.

Regarding the technical effects brought by the twelfth aspect or various possible implementation manners, reference may be made to the introduction to the technical effects of the sixth aspect or corresponding implementation manners.

A thirteenth aspect provides a network device, the network device includes a memory and a processor, the memory is configured to store instructions, the processor is configured to execute the instructions stored in the memory, and respond to the instructions stored in the memory. The execution of enables the processor to execute the method in the first aspect or any possible implementation manner of the first aspect.

A fourteenth aspect provides a terminal device, the terminal device including a memory and a processor, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and the instructions stored in the memory The execution of causes the processor to execute the second aspect or the method in any possible implementation manner of the second aspect.

A fifteenth aspect provides a network device, the network device includes a memory and a processor, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and the instructions stored in the memory The execution of causes the processor to execute the third aspect or the method in any possible implementation manner of the third aspect.

A sixteenth aspect provides a terminal device, the terminal device includes a memory and a processor, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and the instructions stored in the memory The execution of causes the processor to execute the fourth aspect or the method in any possible implementation manner of the fourth aspect.

A seventeenth aspect provides a network device, the network device includes a memory and a processor, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and the instructions stored in the memory The execution of causes the processor to execute the fifth aspect or the method in any possible implementation manner of the fifth aspect.

An eighteenth aspect provides a network device, the network device includes a memory and a processor, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and the instructions stored in the memory The execution of enables the processor to execute the method in the sixth aspect or any possible implementation manner of the sixth aspect.

A nineteenth aspect provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, it implements the first aspect or the method in any possible implementation manner of the first aspect.

A twentieth aspect provides a computer-readable storage medium having a computer program stored thereon, and the program implements the second aspect or the method in any possible implementation manner of the second aspect when the program is executed by a processor.

A twenty-first aspect provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the third aspect or the method in any possible implementation manner of the third aspect is implemented.

A twenty-second aspect provides a computer-readable storage medium having a computer program stored thereon, and the program implements the fourth aspect or the method in any possible implementation manner of the fourth aspect when the program is executed by a processor.

A twenty-third aspect provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, it implements the fifth aspect or the method in any possible implementation manner of the fifth aspect.

A twenty-fourth aspect provides a computer-readable storage medium having a computer program stored thereon, and the program implements the sixth aspect or the method in any possible implementation manner of the sixth aspect when the program is executed by a processor.

A twenty-fifth aspect provides a communication system, which includes the network device in the seventh aspect and any one of the possible implementation manners, the eighth aspect and the terminal device in any one of the possible implementation manners, and the foregoing The ninth aspect and the network device in any possible implementation manner.

The twenty-sixth aspect provides another communication system, which includes the terminal device in the tenth aspect and any one of the possible implementation manners, and the network device in the eleventh aspect and any one of the possible implementation manners. And the network equipment in the above-mentioned twelfth aspect and any one of the possible implementation manners.

A twenty-seventh aspect provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to enable the first The method provided by the aspect or any one of the possible implementation manners is executed.

A twenty-eighth aspect provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to enable the second The method provided by the aspect or any one of the possible implementation manners is executed.

A twenty-ninth aspect provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to enable the third The method provided by the aspect or any one of the possible implementation manners is executed.

A thirtieth aspect provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to enable the fourth aspect Or any of the methods provided in the possible implementation manners are executed.

A thirty-first aspect provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to enable the fifth The method provided by the aspect or any one of the optional implementations is executed.

A thirty-second aspect provides a communication device, including a processor and an interface circuit; the interface circuit is configured to receive code instructions and transmit them to the processor; the processor runs the code instructions to enable the sixth The method provided by the aspect or any one of the possible implementation manners is executed.

In a thirty-third aspect, a chip is provided, the chip includes a processor and a communication interface, the processor is coupled with the communication interface, and is configured to implement the above-mentioned first aspect or any one of the possible implementation manners. method.

In a thirty-fourth aspect, a chip is provided, the chip includes a processor and a communication interface, the processor is coupled with the communication interface, and is used to implement the above-mentioned second aspect or any one of the possible implementation manners. method.

In a thirty-fifth aspect, a chip is provided, the chip includes a processor and a communication interface, the processor is coupled with the communication interface, and is configured to implement what is provided in the third aspect or any one of the possible implementation manners. method.

In a thirty-sixth aspect, a chip is provided, the chip includes a processor and a communication interface, the processor is coupled with the communication interface, and is configured to implement the fourth aspect or any one of the possible implementation manners. method.

In a thirty-seventh aspect, a chip is provided, the chip includes a processor and a communication interface, the processor is coupled with the communication interface, and is used to implement the fifth aspect or any one of the possible implementation manners. method.

In a thirty-eighth aspect, a chip is provided, the chip includes a processor and a communication interface, the processor is coupled with the communication interface, and is configured to implement the sixth aspect or any one of the possible implementation manners. method.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application or the background art, the following will describe the drawings that need to be used in the embodiments of the present application or the background art.

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of this application;

FIG. 2 is a flowchart of a method for updating configuration information according to an embodiment of the application;

FIG. 3 is a flowchart of another configuration information update method provided by an embodiment of the application;

FIG. 4 is a flowchart of another configuration information update method provided by an embodiment of the application;

FIG. 5 is a flowchart of another configuration information update method provided by an embodiment of the application;

FIG. 6 is a flowchart of another method for updating configuration information provided by an embodiment of the application;

FIG. 7 is a flowchart of a four-step random access method involved in an embodiment of this application;

FIG. 8 is a flowchart of a two-step random access method involved in an embodiment of this application;

Fig. 9 is a flow chart of the two-step random access process rolling back to the four-step random access process;

FIG. 10 is a flowchart of another configuration information update method provided by an embodiment of the application;

11A-11E are flowcharts of yet another configuration information update method provided by an embodiment of this application;

FIG. 12 is a schematic structural diagram of a first network device provided by an embodiment of this application;

FIG. 13 is a schematic structural diagram of a terminal network device provided by an embodiment of the application;

FIG. 14 is a schematic structural diagram of a second network device provided by an embodiment of this application;

15 is a schematic structural diagram of another terminal device provided by an embodiment of this application;

FIG. 16 is a schematic structural diagram of another first network device provided by an embodiment of this application;

FIG. 17 is a schematic structural diagram of another second network device provided by an embodiment of this application;

FIG. 18 is a schematic structural diagram of another terminal device provided by an embodiment of this application;

FIG. 19 is a schematic structural diagram of another terminal device provided by an embodiment of this application;

FIG. 20 is a schematic structural diagram of a network device provided by an embodiment of this application.

Detailed ways

As described in the background art, for a UE in an inactive state (idle state or inactive state), how to obtain MBMS-related configuration information in time is a problem that needs to be solved. The currently adopted solution is that after the UE enters the connected state, the network device (for example, the base station) sends the MBMS-related configuration information to the UE through the unicast connection. In other words, only the UE in the connected state can obtain the configuration information related to the MBMS. The solution provided by the embodiment of the present application mainly solves the problem that the UE in the inactive state and the idle state cannot obtain the configuration information related to the MBMS.

In this application, the broadcast-multicast service and/or MBMS may include/understand/replace with any one or more of MBS, multicast, multicast service, broadcast, broadcast service, broadcast-multicast service, and MBMS.

The technical solutions provided in the embodiments of this application can be applied to various communication systems, such as: Global System for Mobile communication (GSM), Code Division Multiple Access (CDMA) systems, and broadband codes Wideband Code Division Multiple Access (WCDMA) system, Long Term Evolution (LTE) system, fifth-generation mobile communication (5th-generation, 5G) system, and next-generation mobile communications, etc. FIG. 1 is a schematic diagram of a communication system provided by an embodiment of this application, and the solution in this application can be applied to the communication system. The communication system may include at least one first network device (corresponding to a base station), only one is shown, such as the next generation Node B (gNB) in the figure, and at least one second network device (corresponding to the core network) ) And one or more terminal devices connected to the first network device, such as UE1, UE2, and UE3 in Figure 1.

As shown in Figure 1, the core network includes: access and mobility management functions (AMF) and user plane functions (UPF). AMF is mainly responsible for control signaling processing, such as establishing MBMS bearer, and assisting in processing group radio network tempory identity (G-RNTI). UPF is responsible for sending and receiving data.

Terminal equipment may also be referred to as user equipment (UE), terminal, and so on. A terminal device is a device with wireless transceiver function, which can be deployed on land, including indoor or outdoor, handheld, wearable, or vehicle-mounted; it can also be deployed on the water, such as a ship, etc.; it can also be deployed in the air, for example, in the air. Airplanes, balloons, or satellites. Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial control) Wireless terminals in ), wireless terminals in self-driving, wireless terminals in remote medical, wireless terminals in smart grid, and wireless terminals in transportation safety , Wireless terminals in smart cities, wireless terminals in smart homes, etc. The terminal device can receive MBMS services, and may also be receiving unicast services at the same time.

The first network device may be a device that can communicate with the terminal device. The first network device may be any device with a wireless transceiver function, including but not limited to a base station. For example, the first network device may be a gNB, or a base station in a future communication system. In some embodiments, the first network device may also be an access node, a wireless relay node, a wireless backhaul node, etc. in a wireless fidelity (WiFi) system. In some embodiments, the first network device may also be a wireless controller in a cloud radio access network (cloud radio access network, CRAN) scenario. In some embodiments, the first network device may also be a small station, a transmission reference point (TRP), a roadside unit, etc. Of course, this application is not limited to this.

In Figure 1, the first network device is gNB. The control plane (CP) of the gNB is responsible for signaling transmission, such as establishing signaling radio bearers (SRB) or data radio bearers (DRB) DRB, and is responsible for allocating cell radio network temporary identities (cell MBMS configuration information such as radio network temporary identifier (C-RNTI) and MBMS key; the user plane (UP) of gNB is responsible for data transmission.

The gNB in Figure 1 can provide broadcast, multicast and unicast services to terminal devices, that is, the communication system in Figure 1 supports MBMS. In Figure 1, C-RNTI represents UE1’s cell wireless network temporary identity, C-RNT2 represents UE2’s cell wireless network temporary identity, C-RNT3 represents UE3’s cell wireless network temporary identity, and G-RNTI represents UE1, UE2, and UE3. Group radio network tempory identity (G-RNTI). It should be understood that the gNB can provide a unicast service to the UE through the C-RNT of the UE, and can also provide a multicast service to the UE through the G-RNT of the UE. Since the embodiment of the present application mainly solves the problem that the terminal equipment in the inactive state and the idle state cannot obtain the configuration information related to MBMS in time, the embodiment of the present application is applicable to any communication system supporting MBMS. The following describes some configuration information update solutions provided by the embodiments of the present application.

Fig. 2 is a flowchart of a method for updating configuration information according to an embodiment of the application. As shown in Figure 2, the method includes:

201. The first network device sends paging information.

The paging information includes first indication information, and the first indication information is used to indicate that the broadcast multicast service configuration information is updated. The above-mentioned first network device may be a gNB in 5G, or a base station in other communication systems, such as an eNB, Node B, and so on.

There are two types of paging information. One type is paging information carried in data channels (such as physical downlink shared channels). This type is mainly service paging (the so-called service paging refers to that the network has service transmission and requires paging). The specific UE will carry the UE’s identity); the first type is the paging information carried in the control channel (such as the physical downlink control channel), and this type is mainly the Earthquake and Tsunami Warning System (ETWS), commercial mobile Early warning system (Commercial Mobile Alert System, CMAS), etc., that is, short message (short message), or direct indication information (direct indication information) in LTE. In some embodiments, the first indication information is a short message (short message) transmitted through a physical downlink control channel (PDCCH). Exemplarily, the reserved bit in the short message indicates that the broadcast and multicast service configuration information has been updated, or the system message update indication in the short message is used to indicate that the broadcast and multicast service configuration information has been updated. In some embodiments, the first indication information is a system message update indication transmitted through a physical downlink shared channel (PDSCH).

The above-mentioned first indication information may indicate that the configuration information of the broadcast multicast service is updated, and may also specifically indicate which configuration information of the MBMS service has been updated. In some embodiments, the first indication information is used to indicate that at least one type of broadcast multicast service whose configuration information is updated, so that UEs interested in the MBMS service or interested in the MBMS service indicated by the first indication information respond to the above-mentioned search. Call information. The possible format of the first indication information will be detailed later.

In some embodiments, before performing step 201, the first network device may receive a broadcast-multicast service configuration information update instruction, and the above-mentioned broadcast-multicast service configuration information update instruction is used to indicate that the broadcast-multicast service configuration information needs to be updated. Exemplarily, the first network device receives a broadcast multicast service configuration information update instruction from the core network (corresponding to the second network device). In other words, the core network notifies the first network device that the configuration information of the MBMS needs to be updated. In some embodiments, if the core network saves information about UEs interested in the updated MBMS, the core network can notify the first network device to send paging information to the aforementioned UEs, so that these UEs can obtain the broadcast multicast service configuration information update instruct. In some embodiments, the core network may notify the first network device to send paging information for all UEs. In some embodiments, the paging information indicates that the configuration information of the MBMS is updated, so that the UE can learn that the purpose of the paging is to update the MBMS service. In some embodiments, if the UE is not interested in the MBMS service, the UE may not respond to the paging message. In some embodiments, the first network device may carry specific MBMS service information in the paging information, thereby specifically indicating which MBMS service configuration information has been updated, so that UEs interested in MBMS that have updated the configuration information respond to the MBMS service information. Paging information.

For example, paging information can include two types. One type is paging information carried in a data channel (for example, a physical downlink shared channel). For example, service paging (the so-called service paging refers to that the network has a service to send, and a specific UE needs to be paged, which will carry the identity of the UE). One type is paging information carried in a control channel (for example, a physical downlink control channel). For example, ETWS, CMAS, etc., which are short messages, or direct indication information in LTE. For example, the paging information may be PDCCH or DCI (or called paging DCI), or the paging information may be included in PDCCH or DCI (or called paging DCI). Optionally, the PDCCH or DCI is scrambled by P-RNTI. P-RNTI: stands for Paging RNTI. For example, P-RNTI can be used for paging and/or system information change notification. RNTI refers to the radio network temporary identifier (radio network temporary identifier). For example, the paging information may be a paging message (for example, paging message).

In some embodiments, the first indication information is information transmitted through PDCCH or DCI, or the first indication information is included in PDCCH or DCI. Optionally, the PDCCH or DCI is scrambled by P-RNTI.

202. The foregoing first network device sends broadcast and multicast service configuration information.

The broadcast multicast service configuration information may be updated MBMS configuration information, especially including updated MBMS keys, key generation parameters, security algorithms, etc. If no special instructions are given, in this embodiment of the application, the MBMS configuration information update includes at least the MBMS key update.

For example, the broadcast-multicast service configuration information may be updated MBMS configuration information or updated broadcast-multicast service configuration information.

For example, broadcast multicast service configuration information and/or MBMS configuration information may include MBMS keys (e.g., updated MBMS keys), key generation parameters (e.g., updated key generation parameters), and security algorithms (e.g., updated Any one or more of the security algorithm), etc.

For example, in this embodiment of the application, the MBMS configuration information update may or may not include the MBMS key update.

The first network device can use any of the following methods to send the broadcast and multicast service configuration information: 1. The broadcast and multicast service configuration information is directly carried in the downlink control information (DCI); 2. Through a separate system message Block sending the configuration information of the broadcast and multicast service; 3. Carry the configuration information of the broadcast and multicast service through the fields in the existing system message block.

The first network device sends broadcast and multicast service configuration information to all terminal devices. In some embodiments, the first network device sends the broadcast multicast service configuration information to the terminal devices interested in the MBMS service or the MBMS whose configuration information is updated. In some embodiments, the first network device sends the broadcast multicast service configuration information to the terminal device that responds to the paging information.

In some embodiments, for a terminal device in an inactive (INACTIVE) state, the first network device may use an access stratum (AS) key to encrypt the MBMS configuration information. Exemplarily, after the first network device notifies the terminal device that the MBMS configuration information has been updated through paging information, the first network device can use the group radio network tempory identity (G-RNTI) scrambled group The broadcast data is sent to at least one terminal device that monitors multicast; wherein, the multicast data includes broadcast-multicast service configuration information encrypted with an MBMS multicast key. Exemplarily, if the first network device stores the cell radio network temporary identifier (C-RNTI) of the terminal device, the first network device may schedule downlink data transmission through the C-RNTI in a unicast manner. Send the MBMS configuration information to the terminal device, and use the AS unicast key to encrypt the transmitted data.

In some embodiments, the first network device may send an encrypted non-access stratum (NAS) message that carries broadcast-multicast service configuration information. Exemplarily, for a terminal device in an idle (IDLE) state or an inactive state, the first network device sends a paging message to notify the terminal device that the MBMS configuration information has been updated (of course, it can also be before, that is, the first network device First request to the core network (corresponding to the second network device), and then send paging information to the terminal device), request to the core network to generate a NAS message containing MBMS configuration information (if the MBMS configuration information is generated by the first network device, the first A network device may carry MBMS configuration information in the above request), the core network may send a NAS message containing MBMS configuration information encrypted with the NAS key of the terminal device to the first network device, and then the first network device encrypts the above The NAS message is sent to the terminal device.

In some embodiments, the first network device separately pages a specific terminal device, and carries a C-RNTI in the paging information, and then uses the aforementioned C-RNTI to send MBMS configuration information to the terminal device.

In some embodiments, the first network device defines an update window for the MBMS configuration, and after the first network device notifies the terminal device that the MBMS configuration information is updated, the terminal device only needs to complete the configuration update within the update window. The main consideration is that if the first network device notifies the terminal device that the MBMS configuration information is updated, and the terminal device needs to establish a connection with the first network device to obtain the updated MBMS configuration information, a large number of terminal devices simultaneously access the network, which will cause network short-term The burden is too heavy.

In the embodiment of the present application, the first network device instructs the broadcast and multicast service configuration information to be updated through the paging information, and can notify the MBMS configuration update in time, and the terminal device can learn that the broadcast and multicast service configuration information is updated without entering the connected state.

The foregoing embodiment did not elaborate on the implementation manner in which the paging information indicates that the broadcast multicast service configuration information is updated. Several implementation methods are described below.

method one

The first network device may use reserved bits (bits) of short messages in the paging information to indicate that the MBMS configuration information is updated.

The current short message format is as follows:

Table 1

In the embodiment of this application, the format of reserved bits of the short message in the paging information is as follows:

Table 2

In mode 1, the third bit of the short message in the paging information is used to indicate whether the MBMS configuration information is updated, that is, whether the MBMS key is updated. If the MBMS configuration information is updated, the first network device sets the third bit of the short message in the paging information to 1; otherwise, it is set to 0. Or, if the third bit is flipped, it is considered that the MBMS configuration information has been updated. For example, a 0 to 1 flip or a 1 to 0 flip indicates that the configuration information of the MBMS service has been updated, otherwise it means that the configuration information of the MBMS service has not been updated. . Of course, it may not be the third bit, but other bits. The short message in the paging information can be sent through the control channel. In some embodiments, the reserved multiple bits of the short message in the paging information indicate the MBMS for which at least one type of configuration information is updated. For example, the reserved K bits of the short message in the paging information are used to indicate the sending of updated MBMS, K is the number of MBMS services, and one bit corresponds to one MBMS service. If a bit corresponding to a certain MBMS service occurs If it is overturned, it is considered that the configuration information of the MBMS service has been updated.

Way two

The first network device defines a special system information block SIB or a field in the SIB to specifically indicate MBMS service update, such as MBMS-Configuration-SIB (corresponding to the first indication information). For example, MBMS-Configuration-SIB contains N bits (bits), where N is the number of MBMS services, and one bit corresponds to one MBMS service. If the bit corresponding to a certain MBMS service is flipped, it is considered that the MBMS service is The configuration information has been updated. For example, a 0 to 1 rollover or a 1 to 0 rollover indicates that the configuration information of the MBMS service has been updated; otherwise, it indicates that the configuration information of the MBMS service has not been updated. Or, 0 indicates that the configuration information of the MBMS service has been updated, and 1 indicates that the configuration information of the MBMS service has not been updated, or vice versa.

Way three

The first network device can use a dedicated SIB or a field in the SIB to specifically indicate the MBMS service for which the configuration information is updated, and use the reserved bits of short messages in the paging information or the system The message update indication bit indicates that the MBMS configuration information is updated.

It should be understood that Manner 1, Manner Two, and Manner Three are only examples of notifying MBMS configuration information to be updated through paging information, and the paging information may also be in other formats, which are not limited in the embodiment of the present application.

FIG. 3 is a flowchart of another method for updating configuration information provided by an embodiment of the application. The method flow in Figure 3 is a further refinement and improvement of the method flow in Figure 1. As shown in Figure 3, the method includes:

301. The first network device receives a broadcast multicast service configuration information update instruction.

The foregoing broadcast-multicast service configuration information update indication is used to indicate that the broadcast-multicast service configuration information needs to be updated.

The first network device receives the broadcast multicast service configuration information update instruction from the second network device (corresponding to the core network). In some embodiments, if the core network saves information about terminal devices that are interested in the updated MBMS, the core network can send paging information for these terminal devices (that is, instruct the first network device to send paging information to these terminal devices ), so that these terminal devices can obtain MBMS update instructions. In some embodiments, the core network may send paging information for all UEs (that is, instruct the first network device to send paging information to all terminal devices). In some embodiments, the first indication information in the paging information indicates that the MBMS configuration information has been updated, so that the terminal device can learn that the purpose of the paging is to update the MBMS service. If the terminal device is not interested in the MBMS service, the terminal device may not respond to the paging message. In some embodiments, the core network may carry specific MBMS service information in the paging information, thereby specifically indicating which MBMS service configuration information has been updated, so that the terminal equipment interested in the MBMS that has changed the configuration information responds to the MBMS service information. Paging information.

302. The first network device sends paging information.

In some embodiments, the above-mentioned broadcast multicast service configuration information update indication is used to instruct the above-mentioned first network device to send the above-mentioned paging information to all terminal devices, and the first network device to send the paging information to all terminal devices in the cell. In some embodiments, the broadcast and multicast service configuration information update indication is used to instruct the first network device to send the paging information to at least one terminal device that is interested in the updated broadcast and multicast service configuration information, and the first network device to At least one terminal device interested in the updated broadcast multicast service configuration information sends paging information. The foregoing first indication information is used to indicate that the broadcast multicast service configuration information is updated. In some embodiments, the above-mentioned first indication information is used to indicate that at least one type of broadcast multicast service whose configuration information has been updated. The implementation of step 302 may be the same as the implementation of step 201.

303. The first network device encrypts the MBMS configuration information using the multicast key of the AS to obtain encrypted MBMS configuration information.

304. The first network device sends the encrypted MBMS configuration information to the terminal device that monitors the multicast through the multicast data scrambled by the G-RNTI.

The multicast data includes encrypted MBMS configuration information obtained by encrypting the MBMS configuration information using the AS's multicast key. In some embodiments, the terminal device that monitors the multicast is in an inactive state.

In the embodiment of this application, the first network device sends the encrypted MBMS configuration information to the terminal device monitoring the multicast through the multicast data scrambled by G-RNTI, and the terminal device does not need to enter the connected state to receive the MBMS configuration information. The power consumption of terminal equipment can be reduced.

FIG. 4 is a flowchart of another method for updating configuration information provided by an embodiment of the application. The method flow in Figure 4 is a further refinement and improvement of the method flow in Figure 1. As shown in Figure 3, the method includes:

401. The first network device receives a broadcast multicast service configuration information update instruction.

The implementation manner of step 401 may be the same as the implementation manner of step 301.

402. The first network device sends paging information.

The implementation of step 402 may be the same as the implementation of step 302.

403. The first network device uses the AS unicast key to encrypt the MBMS configuration information to obtain encrypted MBMS configuration information.

404. The first network device sends the encrypted MBMS configuration information to the terminal device through the C-RNTI in a unicast manner.

In some embodiments, the first network device stores the C-RNTI of at least one terminal device, and the first network device sends the encrypted MBMS configuration information to the terminal device through the C-RNTI of each terminal device in a unicast manner. In some embodiments, the terminal device is in an inactive state.

Optionally, if the C-RNTI is used to send the MBMS configuration information to the terminal device, the AS or NAS key of the terminal device may be used to encrypt the MBMS configuration information.

In the embodiment of the present application, the first network device sends the encrypted MBMS configuration information to the terminal device through the C-RNTI of each terminal device in a unicast mode, and the terminal device does not need to enter the connected state.

FIG. 5 is a flowchart of another method for updating configuration information provided by an embodiment of the application. The method flow in Figure 5 is a further refinement and improvement of the method flow in Figure 1. As shown in Figure 5, the method includes:

501. The first network device receives a broadcast multicast service configuration information update instruction.

The implementation manner of step 501 may be the same as the implementation manner of step 301.

502. The first network device sends paging information.

The implementation of step 502 may be the same as the implementation of step 302.

503. The first network device sends a configuration information generation request to the second network device.

The configuration information generation request is used to request the second network device to generate a NAS message including broadcast and multicast service configuration information. In some embodiments, when the MBMS configuration information is generated by the first network device, the first network device may carry the MBMS configuration information in the configuration information generation request request, and the core network (corresponding to the second network device) may Send a NAS message containing MBMS configuration information encrypted using the NAS key of the terminal device to the first network device. The embodiment of the present application does not limit the execution order of step 503 and step 502. Step 502 may be executed first and then step 503 may be executed, step 503 may be executed first and then step 502 may be executed, or step 502 and step 503 may be executed in parallel.

504. The second network device sends the NAS message containing the MBMS configuration information encrypted using the NAS key of the terminal device to the first network device.

Optionally, a special NAS key can be defined for the MBMS service. At this time, the second network device sends the NAS message containing the MBMS configuration information encrypted using the NAS key corresponding to the MBMS service to the first network device.

505. The first network device sends the foregoing NAS message to the terminal device.

In some embodiments, the terminal device is in an inactive state or an idle state.

In the embodiment of the present application, the first network device sends the encrypted MBMS configuration information to the terminal device through the NAS message, and the terminal device does not need to enter the connected state.

In the embodiment of the present application, the first network device may also send the MBMS configuration information to the terminal device through other messages, and the terminal device does not need to enter the connected state.

Fig. 6 is an interaction flowchart of a configuration information update method provided by an embodiment of the application. The method flow in Figure 6 is a further refinement and improvement of the method flow in Figure 1. As shown in Figure 6, the method includes:

601. The second network device sends a broadcast multicast service configuration information update instruction.

The foregoing broadcast-multicast service configuration information update indication is used to indicate that the broadcast-multicast service configuration information needs to be updated. In some embodiments, the broadcast multicast service configuration information update instruction is included in a paging message, that is, the paging message sent by the core network (corresponding to the second network device) to the base station (corresponding to the first network device). In some embodiments, the above-mentioned broadcast-multicast service configuration information update indication is used to indicate at least one type of broadcast-multicast service whose configuration information needs to be updated. In some embodiments, the above-mentioned broadcast-multicast service configuration information update instruction is used to instruct the above-mentioned first network device to send a page carrying the first indication information to at least one terminal device that is interested in the updated broadcast-multicast service configuration information. Information, or the above-mentioned broadcast-multicast service configuration information update instruction is used to instruct the above-mentioned first network device to send paging information carrying first indication information for all terminal devices; the above-mentioned first indication information is used to indicate the broadcast-multicast service configuration The information is updated. The foregoing second network device may be the AMF in the core network, or may be other network devices that can send signaling such as paging messages/information to the base station (corresponding to the first network device), which is not limited in this application.

602. The first network device sends paging information.

The paging information includes first indication information, and the first indication information is used to indicate that the broadcast multicast service configuration information is updated. The paging information sent by the first network device may be the first network device individually paging the terminal device, and the above-mentioned paging information further includes the C-RNTI of the terminal device. In some embodiments, the above-mentioned first indication information is used to indicate that at least one type of broadcast multicast service whose configuration information has been updated. In some embodiments, if the terminal device is interested in the broadcast multicast service whose configuration information is updated, the terminal device responds to the paging information, and the first network device sends the broadcast multicast service configuration information to the terminal device responding to the paging information. The implementation of step 602 may be the same as the implementation of step 301.

603. The first network device uses the C-RNTI to send the broadcast and multicast service configuration information to the terminal device.

The implementation manner of step 603 may be the same as the implementation manner of step 302.

604. The terminal device updates the broadcast and multicast service configuration information.

The terminal device uses the received broadcast and multicast service configuration information to update its current broadcast and multicast service configuration information. The terminal equipment update broadcast and multicast service configuration information includes at least the MBMS key update.

In the embodiment of the present application, the terminal device in the inactive state or the idle state can obtain updated MBMS configuration information in time.

The foregoing embodiment describes a scheme in which the first network device (for example, a base station) instructs the terminal device to update the broadcast and multicast service configuration information through the paging information, and then sends the broadcast and multicast service configuration information. In the foregoing embodiment, the terminal device cannot actively obtain the updated MBMS configuration information, but passively receives the updated MBMS configuration information or responds to the paging information to obtain the updated MBMS configuration information. The embodiment of the present application provides a solution for the terminal device to actively obtain the updated MBMS configuration information. The main principle of this scheme is as follows: the terminal device informs the network of the MBMS information it is interested in during the RRC connection establishment phase (corresponding to the random access process), and the network (corresponding to the first network device) passes the necessary authentication and authorization verification. , Send the corresponding MBMS configuration information (such as key, GRNTI, etc.) to the terminal device. For example, the terminal device can tell the network the MBMS information it is interested in through the information sent in the third step of the four-step random access process (ie, Msg3). When a terminal device changes from an idle state to a connected state, it needs to initiate an RRC connection establishment process, such as calling, responding to paging, and so on. It should be understood that in the solution provided by the embodiment of the present application, the terminal device can inform the network of the MBMS configuration information that it is interested in during the RRC connection establishment stage, and then obtain the corresponding MBMS configuration information. In other words, the terminal device can obtain the required MBMS configuration information without entering the connected state. The configuration information update method provided in the embodiments of the present application is suitable for two-step random access (also called 2-step RACH) scenarios, and also suitable for four-step random access (4-step RACH) scenarios. The terminal device can obtain the updated MBMS configuration information during the random access process.

In order to fully understand the method shown in this application, the following describes in detail the four-step random access method involved in the embodiment of this application. As shown in Figure 7:

701. The UE sends a random access preamble (random access preamble) to the first network device, which may also be referred to as message 1 (Msg1). The function of the random access preamble is to notify the first network device of a random access request, and enable the first network device to estimate the transmission delay between it and the UE, so that the first network device can calibrate the uplink timing and The calibration information is notified to the UE through a timing advance (TA) command (timing advance command).

702. The first network device sends a random access response (random access response, RAR) to the UE after detecting the random access preamble, which may also be referred to as message 2 (Msg2). The random access response may include the sequence number of the random access preamble received in 701, the timing advance command, the uplink resource allocation information, and the temporary cell-radionetwork temporary identifier (TC-RNTI), etc.

703. The UE receives a random access response, and if the random access preamble indicated by the sequence number of the random access preamble in the random access response is the same as the random access preamble sent by the UE to the first network device in 701, then The UE considers that the random access response is a random access response for the UE, that is, the UE has received the random access response of the UE. After receiving the random access response, the UE sends uplink messages on the uplink resources indicated by the random access response, for example, sending uplink data on the physical uplink shared channel (PUSCH), also known as message 3 (Msg3) . Among them, Msg3 can carry a unique user ID. Because in the process of random access, the content of Msg3 is not fixed. Sometimes it may carry an RRC connection request, and sometimes it may carry some control messages or even service data packets. For example, RRCSetupRequest, RRCResumeRequest, RRCResumeRequest1 and other RRC messages can be transmitted in Msg3. Step 703 is the Scheduled Transmission of the third step in the four-step random access process, which corresponds to PUSCH channel transmission at the physical layer.

704. The first network device receives the uplink message of the UE, and returns a conflict resolution message to the UE that has successfully accessed, which is also called message 4 (Msg4). The first network device will carry the unique user identifier in Msg3 in the conflict resolution message to indicate the UE that has successfully accessed, and other UEs that have not successfully accessed will re-initiate random access. Messages such as RRCSetup, RRCResume, and RRCRelease can be carried in Msg4.

In order to fully understand the method shown in this application, the following describes in detail the two-step random access method involved in the embodiment of this application. As shown in Figure 8:

Step A: The UE sends a first random access message (also called MsgA) to the first network device.

In step A, the random access preamble and the content sent through the PUSCH ("PUSCH payload") are generally referred to as MsgA. Among them, "PUSCH payload" is generally considered to be similar to the Msg3 of the four-step random access process, which is "Scheduled Transmission". Here, in MsgA, that is, "PUSCHpayload" can carry RRC messages such as RRCSetupRequest, RRCResumeRequest, and RRCResumeRequest1.

Step B: After successfully receiving the first random access message, the first network device returns a second random access message (also called MsgB) to the terminal device.

Step B, the contention resolution message, generally called MsgB, generally carries the second step random access response (RAR) and the fourth step contention resolution in the four-step random access process The content of the message. Therefore, in step B, the contention resolution message can carry messages such as RRCSetup, RRCResume, and RRCelease.

In some scenarios, the two-step random access process will fall back to the four-step random access process. The reason for the fallback is that the network did not successfully receive the PUSCH payload of step A of the two-step random access process, but successfully received the random access preamble of step A. Figure 9 is a flow back from a two-step random access process to a four-step random access process. As shown in Figure 9:

Step A: The UE sends a first random access message (also called MsgA) to the first network device.

Step B: If the first network device does not successfully receive the PUSCH payload (PUSCH payload), it returns a fallback indication to the terminal device.

The fallback indication is used to instruct the UE to fall back to the four-step random access procedure.

Here, step B is equivalent to a 4-step RACH random access response (random access response, RAR), and the remaining third and fourth steps are the same as 4-step RACH.

Step 3: The UE performs scheduled transmission (scheduled transmission), for example, sending uplink data on a physical uplink shared channel (PUSCH), which may also be referred to as Msg3.

Step 4: The first network device returns a contention resolution message.

In the fourth step, Msg4 can be transmitted in "contention resolution", and messages such as RRCSetup, RRCResume, and RRCRelease can be carried in Msg4.

The following describes a solution for the terminal device to actively obtain updated MBMS configuration information provided by the embodiment of the present application.

FIG. 10 is a flowchart of another method for updating configuration information provided by an embodiment of the application. As shown in Figure 10, the method includes:

1001. The terminal device sends a broadcast multicast service configuration information update request in the first message of the random access process.

The above-mentioned broadcast-multicast service configuration information update request is used to request to update the broadcast-multicast service configuration information. The above-mentioned first message may be the first message (namely Msg1) or the third message (namely Msg3) in the four-step random access process, or it may be the first random access message (namely Msg3) in the two-step random access process. Also called MsgA).

Exemplarily, the above-mentioned first message is the third message (namely Msg3) in the four-step random access process, and the broadcast multicast service configuration information update request is carried in any one of RRCSetupRequest, RRCResumeRequest, and RRCResumeRequest1, because RRCSetupRequest, The reserved bits in RRCResumeRequest and RRCResumeRequest1 are limited, and the terminal device can simply tell the first network device through Msg3 that it needs to update the configuration information of the MBMS service.

Exemplarily, the foregoing first message is the first random access message (ie MsgA) in the two-step random access process, and the broadcast multicast service configuration information update request is carried in any one of RRCSetupRequest, RRCResumeRequest, and RRCResumeRequest1. The reserved bits in the first message are limited, and the terminal device can simply tell the first network device that it needs to update the MBMS service configuration information through MsgA.

If the terminal device needs to transmit more information to the first network device, it can define a Media Access Control (MAC) control element (CE) and carry it in Msg3 or MsgA through MAC AC The carried bitmap indicates the MBMS service that the terminal device is interested in. Of course, the premise is that the maximum number of MBMS services can be defined, as well as the correspondence between the bits in the bitmap carried by the MAC AC and the MBMS services. Exemplarily, the bitmap carried in the MAC AC in the foregoing first message indicates the broadcast multicast service configuration information to be updated by the foregoing terminal device. For example, the bitmap carried by the MAC AC in the first message includes Q bits, where Q is the number of MBMS services, and one bit corresponds to one MBMS service. If the bit corresponding to a certain MBMS service is flipped, it is considered that the terminal needs to be updated. Configuration information of the MBMS service. Or, if the bit corresponding to a certain MBMS service is set to 1 (or 0), it is considered that the terminal needs to update the configuration information of the MBMS service.

In some embodiments, if the terminal device instructs the first network device or the first network device to determine that the terminal device is only to obtain the MBMS key, the first network device may instruct the terminal device not to enter the connected state.

1002. The first network device sends broadcast and multicast service configuration information.

In some embodiments, before sending the broadcast and multicast service configuration information, the first network device parses the above-mentioned broadcast and multicast service configuration information update request, and after necessary authentication and authorization verification, sends the corresponding MBMS configuration information (such as Key, GRNTI, etc.) to the terminal equipment. The following describes several ways to send broadcast and multicast service configuration information.

method one

As shown in FIG. 11A, the first network device sends the above-mentioned broadcast-multicast service configuration information through the fourth message (Msg4) in the four-step random access process. Exemplarily, the first network device sends the MBMS configuration information to the terminal device through any one of RRCSetup, RRCResume, or RRCRelease.

Way two

The first network device sends the broadcast multicast service configuration information encrypted with the key of the AS. In some embodiments, for the inactive terminal device, as shown in FIG. 11B, the first network device may use the AS key to encrypt the MBMS configuration information, and send the encrypted broadcast multicast service configuration information to the terminal equipment.

Way three

As shown in FIG. 11C, the first network device sends a non-access stratum NAS message in the second message of the four-step random access process or the radio resource control RRC message contained in the second message. The NAS message includes using the terminal The broadcast and multicast service configuration information encrypted by the NAS key of the device. Exemplarily, the foregoing first message is msg3, and the foregoing second message is msg4. In some embodiments, for a terminal device in an idle state, the first network device may send request information to the core network after receiving a broadcast multicast service configuration information update request sent by the terminal device, and the request information requests the second network The device generates a NAS message that includes the broadcast and multicast service configuration information; the first network device receives the NAS message that includes the broadcast and multicast service configuration information sent by the core network, and then sends it to the terminal device in Msg4. Here, the above-mentioned NAS message may be sent in the RRC message contained in Msg4, or the above-mentioned NAS message may be sent directly in Msg4.

Way Four

As shown in FIG. 11D, the first network device sends a radio resource control RRC message carrying configuration information of a broadcast and multicast service. The first network device may send the MBMS configuration information through an RRC message, for example, an RRC reconfiguration message. It should be understood that if one RRC reconfiguration message is for MBMS, the first network device may send the foregoing RRC message in the manner of MBMS. For example, the first network device puts the above-mentioned RRC message on the bearer corresponding to the MBMS service for transmission, and the bottom layer uses the G-RNTI corresponding to the MBMS to schedule and send the above-mentioned RRC message. The RRC message received by the terminal device from the MBMS bearer is considered to be configuration information for the MBMS. In this way, the first network device can send the RRC message in the MBMS mode. At present, RRC messages are all sent to terminal devices in a unicast manner. Sending the RRC message in the MBMS mode enables all terminal devices interested in MBMS to receive the updated MBMS configuration information.

Way Five

As shown in FIG. 11E, the first network device sends the above-mentioned broadcast-multicast service configuration information through the second random access message (MsgB) in the two-step random access process. Exemplarily, the first network device sends the MBMS configuration information to the terminal device through any one of RRCSetup, RRCResume, or RRCRelease. In the fifth mode, the terminal device sends the broadcast and multicast service configuration information update request through MsgA, and the first network device sends the broadcast and multicast service configuration information through MsgB.

In the embodiment of the present application, the UE obtains the configuration information of the MBMS without entering the connected state, which can quickly obtain the configuration information of the MBMS and reduce the power consumption of the terminal device.

With reference to Figure 9 and Figures 11A-11E, it can be seen that the terminal device informs the first network device that the purpose of the random access process is to update the MBMS configuration during the random access process, and the first network device sends MBMS during the random access process. Configured to the terminal device, the terminal device does not need to enter the connected state.

The following describes a schematic structural diagram of the first network device in the foregoing embodiment. FIG. 12 is a schematic structural diagram of a first network device provided by an embodiment of this application. As shown in Figure 9, the first network device includes:

The processing module 1201 is configured to generate paging information, the paging information includes first indication information, and the first indication information is used to indicate that the broadcast multicast service configuration information has been updated;

The sending module 1202 is configured to send the paging information;

The sending module 1202 is also used to send broadcast and multicast service configuration information.

The first network device indicates that the broadcast and multicast service configuration information has been updated through the paging information, and the terminal device can learn that the broadcast and multicast service configuration information has been updated without entering the connected state, and receive the broadcast and multicast service configuration information, which can reduce power consumption.

Optionally, as an embodiment, the foregoing first network device further includes: a receiving module 1203, configured to receive a broadcast multicast service configuration information update instruction of the second network device, and the foregoing broadcast multicast service configuration information update instruction is used to indicate The broadcast and multicast service configuration information needs to be updated.

The first network device in FIG. 12 can implement the operations performed by the first network device in FIG. 2 to FIG. 6.

FIG. 13 is a schematic structural diagram of a terminal device provided by an embodiment of this application. As shown in Figure 13, the terminal equipment includes:

The receiving module 1301 is configured to receive paging information, the paging information includes first indication information, and the first indication information is used to indicate that the broadcast multicast service configuration information has been updated;

The receiving module 1301 is also used to receive broadcast multicast service configuration information;

The processing module 1302 is configured to update the current broadcast and multicast service configuration information according to the broadcast and multicast service configuration information.

Optionally, as an embodiment, the above-mentioned first network device further includes: a processing module 1302, which is further configured to respond to the above-mentioned paging information when the broadcast-multicast service configuration information needs to be updated; In the case of service configuration information, it does not respond to the above-mentioned paging information.

The terminal device in FIG. 13 can implement the operations performed by the terminal device in FIGS. 2 to 6.

FIG. 14 is a schematic structural diagram of a second network device provided by an embodiment of this application. As shown in Figure 14, the second network device includes:

The processing module 1401 is configured to generate a broadcast-multicast service configuration information update instruction, and the above-mentioned broadcast-multicast service configuration information update instruction is used to indicate that the broadcast-multicast service configuration information has been updated;

The sending module 1402 is configured to send the above-mentioned broadcast multicast service configuration information update instruction.

The second network device in FIG. 14 can implement the operations performed by the second network device in FIG. 3 to FIG. 6.

FIG. 15 is a schematic structural diagram of another terminal device provided by an embodiment of this application. As shown in Figure 12, the terminal equipment includes:

The sending module 1501 is configured to send a broadcast-multicast service configuration information update request in the first message of the random access process, and the above-mentioned broadcast-multicast service configuration information update request is used to request to update the broadcast-multicast service configuration information;

The receiving module 1502 is also used to receive broadcast and multicast service configuration information.

In some embodiments, the receiving module 1502 is specifically configured to receive the above-mentioned broadcast and multicast service configuration information carried in a radio resource control RRC message.

In some embodiments, the receiving module 1502 is specifically configured to receive the above-mentioned RRC message sent by the first network device in a broadcast-multicast manner.

In some embodiments, the receiving module 1502 is further configured to receive indication information for instructing the aforementioned terminal device to enter the non-connected state.

FIG. 16 is a schematic structural diagram of another first network device provided by an embodiment of this application. As shown in Figure 16, the first network device includes:

The receiving module 1601 is configured to receive the broadcast and multicast service configuration information update request in the first message of the random access process; the processing module is configured to respond to the broadcast and multicast service configuration information update request;

The sending module 1602 is used to send broadcast multicast service configuration information.

In some embodiments, the above-mentioned first message is the third message in the random access process; the sending module 1602 is specifically configured to send the above-mentioned broadcast-multicast by the above-mentioned first network device through the fourth message in the random access process. Business configuration information.

In some embodiments, the sending module 1602 is specifically configured to send the non-access stratum NAS message in the first message or the radio resource control RRC message contained in the first message by the first network device, where the NAS message includes The broadcast and multicast service configuration information encrypted by the NAS key of the above terminal device.

In some embodiments, the sending module 1602 is further configured to send request information to the second network device, and the request information requests the second network device to generate a NAS message including broadcast multicast service configuration information; the receiving module is also used to Receiving the NAS message from the second network device.

In some embodiments, the sending module 1602 is specifically configured to send a radio resource control RRC message carrying the above-mentioned broadcast multicast service configuration information.

In some embodiments, the sending module 1602 is specifically configured to send the RRC message carrying the above-mentioned broadcast-multicast service configuration information in a broadcast-multicast manner.

In some embodiments, the sending module 1602 is specifically configured to send to the above-mentioned terminal device indication information indicating that the above-mentioned terminal device enters the non-connected state.

FIG. 17 is a schematic structural diagram of another second network device provided by an embodiment of this application. As shown in Figure 17, the second network device includes:

The receiving module 1701 is configured to receive request information, where the request information requests the second network device to generate a non-access stratum NAS message including broadcast multicast service configuration information;

The sending module 1702 is used to send the NAS message including the above-mentioned broadcast and multicast service configuration information.

It should be understood that the above division of each module in the first network device, the terminal device, and the second network device is only a logical function division, and may be fully or partially integrated into one physical entity in actual implementation, or may be physically separated. For example, each of the above modules can be separately established processing elements, or they can be integrated into a certain chip of the terminal for implementation. In addition, they can also be stored in the storage element of the controller in the form of program codes and processed by a certain processor. The component calls and executes the functions of the above modules. In addition, various modules can be integrated together or implemented independently. The processing element here can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed by an integrated logic circuit of hardware in the processor element or instructions in the form of software. The processing element may be a general-purpose processor, such as a network processor or a central processing unit (English: central processing unit, CPU for short), or one or more integrated circuits configured to implement the above methods, such as one or Multiple specific integrated circuits (English: application-specific integrated circuit, abbreviation: ASIC), or, one or more microprocessors (English: digital signal processor, abbreviation: DSP), or, one or more field programmable gates Array (English: field-programmable gate array, referred to as FPGA), etc.

The embodiment of the present application also provides a communication device, and the communication device may be a terminal device or a circuit. The communication device can be used to perform the actions performed by the terminal device in the foregoing method embodiments.

When the communication device is a terminal device, FIG. 18 shows a simplified schematic diagram of the structure of the terminal device. It is easy to understand and easy to illustrate. In FIG. 18, the terminal device uses a mobile phone as an example. As shown in Figure 18, the terminal equipment includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used to process the communication protocol and communication data, and to control the terminal device, execute the software program, and process the data of the software program. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input and output devices.

When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data. For ease of description, only one memory and processor are shown in FIG. 18. In actual terminal equipment products, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or storage device. The memory may be set independently of the processor, or may be integrated with the processor, which is not limited in the embodiment of the present application.

In the embodiments of the present application, the antenna and radio frequency circuit with the transceiving function can be regarded as the transceiving module of the terminal device, and the processor with the processing function can be regarded as the processing module of the terminal device. As shown in FIG. 18, the terminal device includes a transceiver module 1810 and a processing module 1820. The transceiver module may also be called a transceiver, transceiver, transceiver, and so on. The processing module may also be called a processor, a processing board, a processing module, a processing device, and so on. Optionally, the device for implementing the receiving function in the transceiver module 1810 can be regarded as the receiving module, and the device for implementing the sending function in the transceiver module 1810 can be regarded as the sending module, that is, the transceiver module 1810 includes a receiving module and a sending module. The transceiver module may sometimes be called a transceiver, transceiver, or transceiver circuit. The receiving module may sometimes be called a receiver, a receiver, or a receiving circuit. The sending module may also be called a transmitter, a transmitter, or a transmitting circuit.

It should be understood that the transceiver module 1810 is used to perform the sending and receiving operations on the terminal device side in the foregoing method embodiment, and the processing module 1820 is used to perform other operations on the terminal device in the foregoing method embodiment except for the transceiving operation.

For example, in an implementation manner, the transceiver module 1810 is used to perform the receiving operation on the terminal device side in FIG. 2, and/or the transceiver module 1810 is also used to perform other transceiver steps on the terminal device side in the embodiment of the present application. The processing module 1820 is configured to perform operations on the terminal device side in FIG. 2 except for the sending operation and the receiving operation.

For another example, in another implementation manner, the transceiver module 1810 is configured to perform the receiving operations on the terminal device side in steps 302 and 304 in FIG. 3. The processing module 1820 is configured to perform other processing steps on the terminal device side in the embodiment of the present application.

For another example, in another implementation manner, the transceiver module 1810 is used to perform the receiving operations on the terminal device side in step 402 and step 404 in FIG. 4, and/or the transceiver module 1810 is also used to perform the terminal device in the embodiment of the present application Other receiving and sending steps on the side. The processing module 1820 is configured to execute other processing steps on the terminal device side in the embodiment of the present application.

For another example, in still another implementation manner, the transceiver module 1810 is configured to perform the receiving operations on the terminal device side in step 502 and step 505 in FIG. 5. The processing module 1820 is used for other processing steps on the terminal device side in the embodiment of the present application.

For another example, in still another implementation manner, the transceiver module 1810 is configured to perform the receiving operations on the terminal device side in step 602 and step 603 in FIG. 6. The processing module 1820 is configured to execute step 604 in FIG. 6, and/or the processing module 1820 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.

For another example, in another implementation manner, the transceiver module 1810 is configured to perform the sending operation on the terminal device side in step 1001 and the receiving operation on the terminal device side in step 1002 in FIG. 10.

When the communication device is a chip-type device or circuit, the device may include a transceiver module and a processing module. Wherein, the above-mentioned transceiver module may be an input/output circuit and/or a communication interface; the processing module is an integrated processor or a microprocessor or an integrated circuit.

When the communication device in this embodiment is a terminal device, the device shown in FIG. 19 can be referred to. In FIG. 19, the device includes a processor 1910, a sending data processor 1920, and a receiving data processor 1930. The processing module 1302 in the foregoing embodiment may be the processor 1910 in FIG. 19, and completes corresponding functions. The receiving module 1301 in the foregoing embodiment may be the receiving data processor 1930 in FIG. 19, the sending module may be the sending data processor 1920 in FIG. 19, and the receiving module may be the receiving data processor 1930 in FIG. Although the channel encoder and the channel decoder are shown in FIG. 19, it can be understood that these modules do not constitute a restrictive description of this embodiment, and are only illustrative.

As another form of this embodiment, a computer-readable storage medium is provided, and an instruction is stored thereon. When the instruction is executed, the method on the terminal device side in the foregoing method embodiment is executed.

As another form of this embodiment, a computer program product containing instructions is provided, and when the instructions are executed, the method on the terminal device side in the foregoing method embodiment is executed.

When the communication device in this embodiment is a network device, the network device (corresponding to the first network device) may be as shown in FIG. 20, and the network device 2000 includes one or more radio frequency modules, such as a remote radio unit. , RRU) 2010 and one or more baseband modules (baseband unit, BBU) (also referred to as digital unit, digital unit, DU) 2020. The above-mentioned RRU 2010 may be referred to as a transceiver module, which corresponds to the sending module 1201 and the receiving module 1201 in FIG. 9. Optionally, the transceiver module may also be called a transceiver, a transceiver circuit, or a transceiver, etc., which may include at least one antenna 2011 and a radio frequency module 2012. The above-mentioned RRU 2010 part is mainly used for the transmission and reception of radio frequency signals and the conversion between radio frequency signals and baseband signals, for example, for sending instruction information to terminal devices. The above-mentioned BBU 2010 part is mainly used for baseband processing and control of base stations. The above-mentioned RRU2010 and BBU 2020 may be physically set together or physically separated, that is, a distributed base station.

The above-mentioned BBU 2020 is the control center of the base station, and can also be called a processing module, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the above-mentioned BBU (processing module) may be used to control the base station to execute the operation procedure of the first network device in the above-mentioned method embodiment, for example, to generate the above-mentioned indication information.

In an example, the above-mentioned BBU 2020 can be composed of one or more single boards, and multiple single boards can jointly support a single access standard radio access network (such as an LTE network), or can respectively support different access standard radio access networks. Access network (such as LTE network, 5G network or other network). The aforementioned BBU 2020 also includes a memory 2021 and a processor 2022. The aforementioned memory 2021 is used to store necessary instructions and data. The above-mentioned processor 2022 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the first network device in the above method embodiment. The aforementioned memory 2021 and processor 2022 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

As another form of this embodiment, a computer-readable storage medium is provided, and an instruction is stored thereon. When the instruction is executed, the method on the network device side in the foregoing method embodiment is executed.

As another form of this embodiment, a computer program product containing instructions is provided, when the instructions are executed, the method on the network device side in the foregoing method embodiment is executed.

It should be understood that the processor mentioned in the embodiment of the present invention may be a central processing unit (Central Processing Unit, CPU), or may also be other general-purpose processors, digital signal processors (Digital Signal Processors, DSPs), and application-specific integrated circuits ( Application Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory mentioned in the embodiment of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), and electrically available Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be a random access memory (Random Access Memory, RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of RAM are available, such as static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (Double Data Rate SDRAM, DDR SDRAM), Enhanced Synchronous Dynamic Random Access Memory (Enhanced SDRAM, ESDRAM), Synchronous Link Dynamic Random Access Memory (Synchlink DRAM, SLDRAM) ) And Direct Rambus RAM (DR RAM).

It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component, the memory (storage module) is integrated in the processor.

It should be noted that the memories described herein are intended to include, but are not limited to, these and any other suitable types of memories.

It should also be understood that the first, second, third, fourth, and various numerical numbers involved in this specification are only for easy distinction for description, and are not used to limit the scope of the present application.

It should be understood that the term "and/or" in this text is only an association relationship describing the associated objects, indicating that there can be three types of relationships, for example, A and/or B, which can mean: A alone exists, and both A and B exist. , There are three cases of B alone. In addition, the character "/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

It should be understood that in the various embodiments of the present application, the size of the sequence numbers of the above-mentioned processes does not mean the order of execution. The execution order of the processes should be determined by their functions and internal logic, and should not be used in the embodiments of the present invention. The implementation process constitutes any limitation.

A person of ordinary skill in the art may realize that the modules and algorithm steps of the examples described in the embodiments disclosed in this document can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the above-described system, device, and module can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the above-mentioned modules is only a logical function division. In actual implementation, there may be other division methods, for example, multiple modules or components may be combined or may be Integrate into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or modules, and may be in electrical, mechanical or other forms.

The modules described above as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or they may be distributed to multiple network modules. Some or all of the modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional modules in the various embodiments of the present application may be integrated into one processing module, or each module may exist alone physically, or two or more modules may be integrated into one module.

If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application shall be subject to the protection scope of the claims.

Claims (30)

A method for updating configuration information, which is characterized in that it includes: The first network device sends paging information, where the paging information includes first indication information, and the first indication information is used to indicate that the broadcast multicast service configuration information has been updated; The first network device sends broadcast and multicast service configuration information. The method according to claim 1, wherein the first indication information is used to indicate at least one broadcast multicast service whose configuration information has been updated. The method according to claim 1 or 2, wherein the first indication information is a short message transmitted through a physical downlink control channel; a reserved bit in the short message indicates that the broadcast multicast service configuration information has been updated Or, the system message update indication in the short message is used to indicate that the broadcast multicast service configuration information has been updated. The method according to any one of claims 1 to 3, wherein before the first network device sends the paging information, the method further comprises: The first network device receives the broadcast-multicast service configuration information update instruction of the second network device, and the broadcast-multicast service configuration information update instruction is used to indicate that the broadcast-multicast service configuration information needs to be updated. The method according to claim 4, wherein the broadcast multicast service configuration information update instruction is used to instruct the first network device to send to at least one terminal device interested in the updated broadcast multicast service configuration information The paging information or the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the paging information to all terminal devices. A method for updating configuration information, which is characterized in that it includes: The terminal device receives paging information, where the paging information includes first indication information, and the first indication information is used to indicate that the broadcast multicast service configuration information has been updated; The terminal device receives the broadcast multicast service configuration information. The method according to claim 6, wherein the first indication information indicates at least one broadcast multicast service whose configuration information has been updated. The method according to claim 6 or 7, wherein the first indication information is a short message transmitted through a physical downlink control channel; a reserved bit in the short message indicates that the broadcast multicast service configuration information has been updated Or, the system message update indication in the short message is used to indicate that the broadcast and multicast service configuration information has been updated. The method according to any one of claims 6 to 8, wherein after the terminal device receives the paging information, the method further comprises: The terminal device responds to the paging information in the case that the broadcast and multicast service configuration information needs to be updated; The terminal device does not respond to the paging information when there is no need to update the broadcast and multicast service configuration information. The method according to any one of claims 6 to 9, wherein the terminal device is in any one of an active state, an idle state, and an inactive state. A method for updating configuration information, which is characterized in that it includes: The second network device generates a broadcast-multicast service configuration information update instruction, where the broadcast-multicast service configuration information update instruction is used to indicate that the broadcast-multicast service configuration information has been updated; The second network device sends the broadcast multicast service configuration information update instruction. The method according to claim 11, wherein the broadcast multicast service configuration information update indication is used to indicate at least one broadcast multicast service whose configuration information has been updated. The method according to claim 11 or 12, wherein the broadcast multicast service configuration information update instruction is used to instruct the first network device to send at least one terminal interested in the updated broadcast multicast service configuration information The device sends paging information that carries the first indication information, or the broadcast-multicast service configuration information update instruction is used to instruct the first network device to send the paging information that carries the first indication information for all terminal devices; The first indication information is used to indicate that the broadcast multicast service configuration information has been updated. A communication device, characterized in that it comprises: A processing module, configured to generate paging information, the paging information includes first indication information, and the first indication information is used to indicate that the broadcast multicast service configuration information has been updated; A sending module for sending the paging information; The sending module is also used to send broadcast multicast service configuration information. The communication device according to claim 14, wherein the first indication information is used to indicate at least one broadcast and multicast service whose configuration information has been updated. The communication device according to claim 14 or 15, wherein the first indication information is a short message transmitted through a physical downlink control channel; a reserved bit in the short message indicates that the broadcast multicast service configuration information has been Update, or, the system message update indication in the short message is used to indicate that the broadcast multicast service configuration information has been updated. The communication device according to any one of claims 14 to 16, wherein the communication device further comprises: The receiving module is configured to receive a broadcast-multicast service configuration information update instruction of the second network device, where the broadcast-multicast service configuration information update instruction is used to indicate that the broadcast-multicast service configuration information needs to be updated. The communication device according to claim 17, wherein the broadcast and multicast service configuration information update instruction is used to instruct the first network device to send at least one terminal device interested in the updated broadcast and multicast service configuration information Sending the paging information, or the broadcast multicast service configuration information update instruction is used to instruct the first network device to send the paging information to all terminal devices. A communication device, characterized in that it comprises: A receiving module, configured to receive paging information, where the paging information includes first indication information, and the first indication information is used to indicate that the broadcast multicast service configuration information has been updated; The receiving module is also used to receive broadcast multicast service configuration information; The processing module is used to update the current broadcast and multicast service configuration information according to the broadcast and multicast service configuration information. The communication device according to claim 19, wherein the first indication information indicates at least one broadcast multicast service whose configuration information has been updated. The communication device according to claim 19 or 20, wherein the first indication information is a short message transmitted through a physical downlink control channel; a reserved bit in the short message indicates that the broadcast multicast service configuration information has been Update, or, the system message update indication in the short message is used to indicate that the broadcast multicast service configuration information has been updated. The communication device according to any one of claims 19 to 21, characterized in that: The processing module is further configured to respond to the paging information when the broadcast and multicast service configuration information needs to be updated; and not to respond to the paging information if the broadcast and multicast service configuration information does not need to be updated. The communication device according to any one of claims 19-22, wherein the terminal device is in any one of an active state, an idle state, and an inactive state. A communication device, characterized in that it comprises: A processing module, configured to generate a broadcast-multicast service configuration information update instruction, where the broadcast-multicast service configuration information update instruction is used to indicate that the broadcast-multicast service configuration information has been updated; The sending module is used to send the broadcast multicast service configuration information update instruction. The communication device according to claim 24, wherein the broadcast multicast service configuration information update indication is used to indicate at least one broadcast multicast service whose configuration information has been updated. The communication device according to claim 24 or 25, wherein the broadcast-multicast service configuration information update indication is used to instruct the first network device to send at least one person interested in updated broadcast-multicast service configuration information The terminal device sends paging information that carries the first indication information, or the broadcast multicast service configuration information update instruction is used to instruct the first network device to send paging information that carries the first indication information for all terminal devices ; The first indication information is used to indicate that the broadcast multicast service configuration information has been updated. A computer-readable storage medium, wherein the computer-readable storage medium is used to store instructions, and when the instructions are executed, the method according to any one of claims 1 to 5 is realized. A computer-readable storage medium, wherein the computer-readable storage medium is used to store instructions, and when the instructions are executed, the method according to any one of claims 6-10 is realized. A computer-readable storage medium, wherein the computer-readable storage medium is used to store instructions, and when the instructions are executed, the method according to any one of claims 11-13 is realized. A communication system, characterized by comprising the communication device according to any one of claims 14 to 18, the communication device according to any one of claims 19 to 23, and the communication device according to any one of claims 24 to 26 Device.

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