Patent ID: 7342905

Claim:
A communications system, comprising: a network having a first part and a second part, the first and second parts being connected so that a first user in one of the first and second parts can communicate with a second user in the other of the first and second parts, wherein at least the first user is able to move within the respective part of the communication system; a gateway for permitting communications between the first and second parts, the gateway comprising a register for storing information associating the first and second users and for storing information relating to the current location of the first user so that information from the second user can be directed to first user, wherein the first user is a mobile terminal which is in communication with a base station which is coupled to a respective network element and information relating to the identity of the network element stored in the register as the current location information of the first user; and an identifier, allocated in the network element which receives communications intended for the first user, is stored in the register.