Communication system, communication terminal, and network

A communication terminal configured to perform radio communication with a plurality of networks, wherein

• the communication terminal determines whether or not there is paging causing collision among a plurality of pagings respectively transmitted to the communication terminal from the plurality of networks, and when the communication terminal detects the collision of the paging, the communication terminal notifies at least one of the plurality of networks that transmits the paging causing the collision of the paging about the collision of the paging.

A network configured to perform radio communication with a communication terminal, wherein

• the communication terminal determines that paging transmitted from the network to the communication terminal collides with paging transmitted from another network to the communication terminal, and when the communication terminal notifies the network of collision of the paging, the network changes timing of transmitting the paging to the communication terminal.