FIELD: information technologies.
SUBSTANCE: after an execution unit for selection of an access gateway receives a request to establish a connection for data transfer from a subscriber terminal, the execution unit of gateway selection encapsulates a domain name of an operator corresponding to the request for establishment of a connection for data transfer, into a request for analysis of DNS when creating such request and sends it to a DNS-server. The DNS-server analyses the access gateway address and sends a reply with DNS analysis results to the execution unit of gateway selection, including information on the access gateway address corresponding to the operator's domain name. In accordance with this information, the execution unit of gateway selection selects an access gateway corresponding to a domain name of an operator as an access gateway corresponding for establishment of a connection for data transfer.
EFFECT: less restrictions on selection of a gateway on a server of DNS analysis in a roaming area, so that even if a DNS-server of a guest network operator does not contain information on an address of home network operator access gateway, it may select a gateway of access to a home network for a subscriber terminal in roaming.
16 cl, 13 dwg
