Patent ID: 7359350

Claim:
A location registration server for a use in a mobile packet communication system including mobile terminals connected via a mobile radio communication network, subscriber nodes accommodating said mobile terminals, and gate nodes connected to fixed equipment including Internet service providers or local area networks, said location registration server being associated with a group of destination packet addresses having the same high-order digits, wherein said subscriber nodes, said gate nodes, and said location registration server are interconnected by a network and are each assigned a unique packet address for routing, said location registration server comprising: a register which stores, for each mobile terminal assigned a packet address containing the high-order digit of packet destination address associated with said location registration server, the address of a subscriber node currently serving said each mobile terminal, or stores, for each fixed equipment assigned a packet address containing said high-order digit, the address of a gate node to which said each fixed equipment is connected; means for retrieving, by reference to a destination packet address contained in a packet received from a transmitting node which is a subscriber node that received a packet from a particular mobile terminal or a gate node that received a packet from particular fixed equipment, the address of a mobile terminal corresponding to said destination address or the address of a receiving gate node connected to the fixed equipment corresponding to said destination address; and means for returning the retrieved receiving node address to said transmitting node.