ACCESSING GATEWAY SELECTING METHOD, SYSTEM AND GATEWAY SELECTING IMPLEMENTING NODE OF MOBILE GROUP DOMAIN

摘要

A gateway selecting method, system and gateway selecting implementing node of a mobile group domain are disclosed. The method including: after a gateway selecting implementing node receives a carrying establishment request sent by a user terminal, the gateway selecting implementing node encapsulating the domain name of an operator corresponding to the carrying establishment request into the DNS analysis request when creating a DNS analysis request, and sending it to the DNS server; the DNS server performing an address analysis of the accessing gateway; the DNS server returning the result of the DNS analysis to the gateway selecting implementing node, which includes the address information of the accessing gateway corresponding to the domain name of the operator; according to the address information, the gateway selecting implementing node selecting the accessing gateway corresponding to the domain name of the operator as the accessing gateway corresponding to the carrying establishment request. This solution can reduce the limit of the gateway selecting from the DNS analysis server in the roaming area, so that even though the DNS server of the operator in the roaming area doesn't store the address information of the accessing gateway of the operator in the attaching area, it can select the accessing gateway to the attaching area for the roaming user terminal.