Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1996-08-06
1999-01-05
Cumming, William
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455432, 455436, 455560, H04Q 720
Patent
active
058571531
ABSTRACT:
A system and method of providing seamless interoperability for a mobile station roaming between cellular telecommunication systems operating in multiple hyperbands such as the 1900-MHz PCS hyperband and the 800-MHz cellular telephone hyperband, utilizing United States cellular standards. An enhanced inter-exchange communications protocol based on IS-41 is utilized to communicate information required for seamless interoperability between mobile switching centers (MSCs). The enhanced inter-exchange communications protocol comprises a plurality of signaling messages and a plurality of modified message parameters within the signaling messages. The modified message parameters are modified to include information elements required for seamless interoperability between the multi-hyperband capable exchanges and are added as optional (overriding) parameters to the signaling messages.
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Bethea, Jr. Thomas
Cumming William
Smith Steven W.
Telefonaktiebolaget LM Ericsson (publ)
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