GSM-R enhanced emergency call service registration and logout method and apparatus

The invention discloses a GSM-R enhanced emergency call service registration and logout method and apparatus. The GSM-R enhanced emergency call service registration and logout method comprises the steps: the step S1: determining whether a function number waiting for network registration/logout is identical to a set bounded function number; if the function number waiting for network registration/logout is identical to the set bounded function number, performing the step S2; and if the function number waiting for network registration/logout is not identical to the set bounded function number, performing the step S3; the step S2: sending a request for registration/logout of the function number and a request for registration/logout of the enhanced railway emergency call service to the network at the same time; and the step S3: sending a request for registration/logout of the function number to the network. The GSM-R enhanced emergency call service registration and logout method and apparatus can prevent frequent registration and logout of the enhanced railway emergency call at the same time because of registration and logout of the function number, and can guarantee that GSM-R network terminal equipment is always under the enhanced railway emergency call service state and negligible railway emergency calls are not answered, and can reduce the network flow load.