Method and equipment for avoiding circuit switching call disconnection

The invention provides a method and equipment for avoiding circuit switched call disconnection. Various solutions for avoiding circuit switched call disconnection for user equipment and network equipment in mobile communication are described. A device may send a non-access stratum (NAS) message in a NAS signaling connection, the device may receive a NAS response message, the device may start a timer to control the NAS signaling connection, the device may also receive a circuit switched (CS) service notification, the device may stop the timer and execute a CS service process in response to receiving the CS service notification and before the timer expires. 本发明提供了一种避免电路交换呼叫掉线的方法和设备，描述了在移动通信中针对用户设备和网络设备避免电路交换呼叫掉线的各种解决方案。设备可在非接入层(NAS)信令连接中发送NAS消息，该设备可接收NAS响应消息，该设备可启动定时器以控制NAS信令连接，该设备还可接收电路交换(CS)服务通知，该设备在响应于接收CS服务通知并且定时器到期之前，停止定时器并执行CS服务进程。