Embodiments of this application provide a message forwarding method and an apparatus, so that a message for joining a multicast group is sent to a multicast user plane network element, and the multicast user plane network element is triggered to establish a tunnel for transmitting multicast data between the multicast user plane network element and an application server. The method may include: a multicast session management network element receives the message that indicates that a terminal is joining the multicast group; and when the terminal is the 1.sup.st terminal the multicast group, sends, to the multicast user plane network element, a message that requests to establish the tunnel for transmitting the multicast data between the multicast user plane network element and the application server.

A communication method, an access network device, a terminal device, and a core network device where the terminal device is handed over from a first access network device to a second access network device, the second access network device learns of first service progress of the first access network device based on a first sequence number of a data packet forwarded by the first access network device, without introducing additional progress exchange information between the two access network devices.

A multicast communication method and a communication apparatus provide for transmission of data of a multicast service using a PDU session established by a terminal device to improve network element utilization. An AF network element sends first multicast service indication information to a session management network element indicating a first multicast service. The session management network element sends, based on the first multicast service indication information, multicast service information to an access network device that serves a terminal device. The access network device establishes an association relationship between the terminal device and the first multicast service based on the multicast service information, so that the access network device can send, when receiving data of the first multicast service, the data of the first multicast service to the terminal device using a PDU session.

A multicast communication method and a communication apparatus provide for transmission of data of a multicast service using a PDU session established by a terminal device to improve network element utilization. An AF network element sends first multicast service indication information to a session management network element indicating a first multicast service. The session management network element sends, based on the first multicast service indication information, multicast service information to an access network device that serves a terminal device. The access network device establishes an association relationship between the terminal device and the first multicast service based on the multicast service information, so that the access network device can send, when receiving data of the first multicast service, the data of the first multicast service to the terminal device using a PDU session.

Embodiments of this application provide a radio bearer configuration method, an apparatus, and a system. A multicast radio bearer used to receive a multicast/broadcast service is established between a terminal and a base station, to reduce complexity of processing the data of the multicast service by the base station. This solution includes: A base station receives a first request message, where the first request message requests to add a first terminal to a multicast/broadcast service; and the base station sends configuration information of a multicast radio bearer to the first terminal based on quality of service QoS flow information of the multicast/broadcast service. The configuration information is used to configure the multicast radio bearer, the multicast radio bearer is used to transmit data of the multicast/broadcast service to a terminal that has joined the multicast/broadcast service, and the terminal that has joined the multicast/broadcast service includes the first terminal.

Disclosed are a communication system of a display screen, a communication method of a display screen, and a cabinet. The communication system includes a signal station, and a display screen spliced by a plurality of cabinets. The signal station and the plurality of cabinets form a star-shaped communication structure to establish a wireless communication connection for wireless signal transmission of information, and a wireless signal is transmitted wirelessly between the plurality of cabinets.

Disclosed are a method and a device for group handover in a communication system. An operation method of a header terminal comprises the steps of: transmitting a configuration information message including a first indicator indicating a measurement reporting subject to member terminals participating in the sidelink groupcast communication; if the measurement reporting subject indicated by the first indicator is the header terminal, receiving, from the member terminals, measurement reporting messages including results of measurement operations performed for at least one neighboring base station; and transmitting a configuration reporting message including the results of the measurement operations to a serving base station accessed by the header terminal. Therefore, the performance of the communication system can be improved.

Methods, systems, and devices for wireless communications are described. A communication device, otherwise known as a user equipment (UE) may receive signaling indicating a set of multicast configurations for a set of multicast modes supported by the UE. Each multicast mode of the set of multicast modes may be associated with one or more radio resource control (RRC) states. The UE may determine a multicast configuration of the set of multicast configurations based on an RRC state according to which the UE is operating. The UE may receive, while operating according to the RRC state, multicast data according to the determined multicast configuration.

A facility for testing location determination for emergency calls is described. Software on a mobile device collects a GPS location from the mobile device, and places an emergency call that encloses information usable by the emergency call processing system to calculate mobile device location. After the system performs this calculation, the call is detected to be a testing call and routed to a computer rather than an emergency dispatcher. The computer sends an SMS or other non-telephony message to the mobile device containing the calculated location. The mobile device stores the collected GPS location and the calculated location received in the non-telephony message together for comparison.

A method, apparatus and non-transitory computer readable storage medium, in one embodiment, associating at least one wireless device and at least one user, requesting audio information from at least one remote source by the at least one wireless device, receiving the audio information from the remote source, broadcasting an audio identifier to the at least one wireless device, using the audio information, authenticating the association between the at least one wireless device and at least one transport, based on the audio information, determining at least one characteristic of the at least one user based on at least one of at least one user search history and at least one user preference selection and determining at least one probable route of the at least one transport based on the at least one characteristic and at least one of at least one route history and at least one input destination.