Multiplex communications – Wide area network – Packet switching
Patent
1994-06-28
1996-05-21
Olms, Douglas W.
Multiplex communications
Wide area network
Packet switching
370 941, 455 561, H04J 302
Patent
active
055197060
ABSTRACT:
In a communications system comprising a number of base stations, each base station communicating over a shared communication channel with a plurality of registered stations and controlling the network cell formed by said plurality of registered stations, a method is described for dynamically registering and deregistering mobile stations. Each station owns a unique address and is allocated a local identifier at registration time. Each network cell owns a unique cell identifier known to all registered stations belonging to this network cell. Base stations manage cell members data uniquely associating the unique address and the local identifier corresponding to each one of the mobile stations belonging to their network cell. A registration request is sent to a selected base station by a registering mobile station, comprising the unique cell identifier of the network cell controlled by the selected base station and the unique address of the registering mobile station; the selected base station detects in its cell members data any conflicting registered station whose unique address matches the unique address of the registering mobile station and sends an address check packet to any conflicting registered station, comprising the unique address of the conflicting registered station, its local identifier and the identifier of the network cell it controls. A receiving registered mobile station sends to the selected base station, an acknowledgement to the address check packet if its unique address, the local identifier of its owning base station and its network cell identifier all match with the ones carried by the address check packet. The selected base station rejects the registration request it it receives an acknowledgement to its address check packet. The same address check packet is used to deregister inactive stations.
REFERENCES:
patent: 5159592 (1992-10-01), Perkins
Bantz David
Bauchot Frederic
Bello Eliane D.
Krawczyk Hugo
Kutten Shay
International Business Machines - Corporation
Keohane Stephen T.
Knearle Homer L.
Olms Douglas W.
Ton Dang
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