Patent ID: 7023855

Claim:
A method for establishing a packet data communication connection in a communication network between a first user equipment and a second user equipment, said communication network comprising at least two access networks for establishing a data path between the communication network and the respective user equipment, said first user equipment being connected with one of said at least two access networks and said second user equipment being connected with the other one of said access networks, at least two serving GPRS support nodes for controlling a respective different one of said access networks, and at least one database for storing information used for a communication connection in said communication network and connected with said at least two serving nodes, said method comprising the steps of: requesting a communication connection to the second user equipment by the first user equipment to the respective serving GPRS support node, such a request including a specific fixed information element for an identification of the second user equipment, determining in said database on the basis of said specific fixed information element identifying the second user equipment a location of said second user equipment within the communication network at the respective other serving GPRS support node, deciding, whether said second user equipment is reachable or accepts the communication connection or not, and if the decision is positive, establishing the communication connection between the first and the second user equipment via a direct connection between said serving GPRS support nodes adapted to perform a packet data communication.