As an optional embodiment, the state information includes identification information of a network where the remote terminal device is located, and quality information on a link between the remote terminal device and a network device corresponding to the identification information of the network, and/or the state information includes identification information of the relay terminal device having the subscription relationship and/or the connection relationship with the remote terminal device and quality information on a link between the remote terminal device and the relay terminal device.

As an optional embodiment, the transceiver module 410 is configured to receive the state information sent by the remote terminal device through an air interface message, or receive the state information sent by the remote terminal device through the relay terminal device.

As an optional embodiment, the device 400 is a first access network device, and the transceiver module 410 is further configured to receive the state information sent by a first core network device, where the state information sent by the first core network device is sent to the first core network device by the remote terminal device; or receive the state information sent by at least one second access network device, where the state information sent by the at least one second access network device is sent to the at least one second access network device by the remote terminal device.

As an optional embodiment, the transceiver module is further configured to:

• • receive a first paging request message sent by the first core network device, where the first paging request message carries the state information.