Cellular telecommunications network having seamless interoperability between exchanges while supporting operation in multiple frequency hyperbands
First Claim
1. A cellular telecommunications network providing seamless interoperability for multi-hyperband capable mobile stations roaming between multi-hyperband capable exchanges and changing frequency hyperbands as required, said cellular telecommunications network comprising:
- a plurality of multi-hyperband capable mobile switching centers (MSCs);
a plurality of base stations connected to each of said plurality of MSCs, said base stations having transmission and reception equipment operating in a plurality of frequency hyperbands;
a plurality of multi-hyperband capable mobile stations roaming between said multi-hyperband capable exchanges each of said mobile stations having means for changing frequency hyperbands to communicate with said MSCs through said base stations, an inter-exchange communications protocol for communicating information required for seamless interoperability between said plurality of MSCs and said multiple hyperbands, said interexchange communications protocol comprising;
a plurality of signaling messages in an industry standard message format; and
a plurality of modified message parameters within said signaling messages, said modified message parameters being modified to include information elements required for seamless interoperability between said multi-hyperband capable exchanges and said multiple hyperbands.
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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.
63 Citations
21 Claims
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1. A cellular telecommunications network providing seamless interoperability for multi-hyperband capable mobile stations roaming between multi-hyperband capable exchanges and changing frequency hyperbands as required, said cellular telecommunications network comprising:
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a plurality of multi-hyperband capable mobile switching centers (MSCs); a plurality of base stations connected to each of said plurality of MSCs, said base stations having transmission and reception equipment operating in a plurality of frequency hyperbands; a plurality of multi-hyperband capable mobile stations roaming between said multi-hyperband capable exchanges each of said mobile stations having means for changing frequency hyperbands to communicate with said MSCs through said base stations, an inter-exchange communications protocol for communicating information required for seamless interoperability between said plurality of MSCs and said multiple hyperbands, said interexchange communications protocol comprising; a plurality of signaling messages in an industry standard message format; and a plurality of modified message parameters within said signaling messages, said modified message parameters being modified to include information elements required for seamless interoperability between said multi-hyperband capable exchanges and said multiple hyperbands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A cellular telecommunications network providing seamless interoperability for a mobile station roaming between multi-hyperband capable exchanges, said cellular telecommunications network comprising:
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a plurality of multi-hyperband capable mobile switching centers (MSCs); a plurality of base stations connected to each of said plurality of MSCs, said base stations having transmission and reception equipment operating in a plurality of frequency hyperbands, an inter-exchange communications protocol for communicating information required for seamless interoperability between said plurality of MSCs said inter-exchange communications protocol comprising; a plurality of signaling messages in IS-41 message format; and a plurality of modified message parameters within said signaling messages said modified message parameters including; new optional parameters that override mandatory parameters in said signaling messages and that replace existing optional parameters in said signaling messages. said new optional parameters including information elements required for seamless interoperability between said multi-hyperband capable exchanges, said information elements including; unmodified IS-41 information elements which include an information element that commands initial mobile station power level, an information element that identifies particular cells and an information element that identifies digital traffic channel numbers; modified IS-41 information elements which include an information element that indicates a time slot and rate for an assigned traffic channel; and new information elements which include an information element that provides frequency band information for specifying a hyperband for a channel, an information element that identifies digital traffic channel bandwidth requirements, an information element that identifies a voice mode for requested voice calls, an information element that identifies requested services, an information element that indicates which frequency bands and hyperbands are supported by a mobile station, an information element that indicates a mobile station'"'"'s protocol version, and an information element that indicates which voice coders are supported by a mobile station. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A method of providing seamless interoperability for multihyperband capable mobile stations roaming between a plurality of multi-hyperband capable exchanges in a cellular telecommunications network and changing frequency hyperbands as required, said method comprising the steps of:
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connecting a plurality of multi-hyperband capable mobile switching centers (MSCs) to a plurality of base stations having transmission and reception equipment operating in a plurality of frequency hyperbands; and communicating information between said plurality of MSCs with an inter-exchange communications protocol having a plurality of signaling messages comprising a plurality of message parameters, said communicating step further comprising the steps of; formatting said plurality of signaling messages in an industry standard message format; and modifying said plurality of signaling messages and said plurality of message parameters to include message parameters and information elements required for said mobile stations to seamlessly operate between said multi-hyperband capable exchanges, and to change frequency hyperbands as required. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification