Method for processing register request, network element, and communication system

摘要

The invention provides a method for processing register request, network element, and a communication system. The method for processing a register request of a terminal in a communication system that comprises a first network element (GSN) for providing IP networking service to said terminal, a second network element (P-CSCF) for providing SIP proxy service to said terminal, a third network element (S-CSCF) for providing SIP subscriber service to said terminal, and a fourth network element (HSS) for storing information about said terminal including said terminal's address; wherein the communication system further comprises a fifth network element (NAPT) for translating said terminal's address in between said first network element and said second network element; said method comprise : determining whether a message issued by said terminal for said register request has undergone Network Address Port Translation; indicating an address for address verification in said message based on the determination whether said message has undergone Network Address Port Translation; and verifying the address for address verification in said message against the information stored in said fourth network element.