In addition, the network architecture and the service scenario described in the embodiments of this application are intended to describe the technical solutions in the embodiments of this application more clearly, and do not constitute a limitation on the technical solutions provided in the embodiments of this application. A person of ordinary skill in the art may know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided in the embodiments of this application are also applicable to similar technical problems.
A user terminal in the embodiments of this application may include various handheld devices, vehicle-mounted devices, wearable devices, or computing devices that have a wireless communication function, or other processing devices connected to a wireless modem, or may include UE, a subscriber unit, a cellular phone, a smartphone, a wireless data card, a personal digital assistant (PDA) computer, a tablet computer, a wireless modem, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a machine type communication (MTC) terminal, the UE, a mobile station (MS), a terminal device, relay UE, or the like. The relay user equipment may be, for example, a 5G residential gateway (RG). For ease of description, in the embodiments of this application, the devices mentioned above are collectively referred to as user terminals, and an example in which the user terminal is UE is used for description.
The access network device may alternatively be a RAN device.