Patent ID: 8862163

Claim:
A service implementation method, comprising: receiving, by a mobility management element, a paging trigger message for paging a terminal device sent by a serving gateway; and determining, by the mobility management element, that the paging trigger message for paging the terminal device is a paging trigger message with a serving priority and the mobility management element has sent a paging message with a serving priority to an access network element, and skipping, by the mobility management element, sending a paging message to the access network element based on the determination; or determining, by the mobility management element, that the paging trigger message for paging the terminal device is a paging trigger message with a serving priority and that the mobility management element has sent no paging message with a serving priority to an access network element if the mobility management element has recorded no information indicating that a paging message with a serving priority has been sent, and sending, by the mobility management element, a paging message to the access network element based on the determination that a paging message with a serving priority has not been sent and recording, by the mobility management element, information indicating that a paging message with a serving priority has been sent.