Periodic system ordered rescan in a cellular communication system
First Claim
1. A method for controlling the rescanning of paging channels by mobile stations in a cellular radio telephone system, wherein said mobile stations are operationally connected to at least one base station, said method comprising the step of periodically broadcasting a rescan message from said base station to said mobile stations at a predetermined interval during operation of said base station, which message instructs the mobile stations connected to said base station to initiate scanning of paging channels for the system.
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Accused Products
Abstract
A method for use in a cellular radio telephone system for controlling, in at least one mobile station, rescanning operations of paging channels in the system, wherein the mobile station is operationally connected to at least one base station. The method involves broadcasting a rescan message from the base station to the mobile station at predetermined intervals during operation of the base station. Pages to be sent to the mobile stations are stored immediately following broadcast of the rescan message until such time as all mobile stations have had an adequate opportunity to carry out the rescanning operation.
188 Citations
18 Claims
- 1. A method for controlling the rescanning of paging channels by mobile stations in a cellular radio telephone system, wherein said mobile stations are operationally connected to at least one base station, said method comprising the step of periodically broadcasting a rescan message from said base station to said mobile stations at a predetermined interval during operation of said base station, which message instructs the mobile stations connected to said base station to initiate scanning of paging channels for the system.
- 6. In a cellular mobile telephone communications system of the type in which mobile stations communicate with base stations over communication channels and autonomously rescan at least some of the communications channels of the system at a predetermined interval after a previous scan to locate channels having acceptable transmission quality, a method for controlling the scanning of the channels to minimize the incidents of calls which are lost during such scanning, comprising the step of periodically transmitting commands to rescan the channels from the base stations to the mobile stations at a rate in which the period between the transmissions of said commands is less than said predetermined interval.
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11. A method for use in a cellular radio telephone system for selecting an optimal paging channel for at least one mobile station, wherein said mobile station is operationally connected to at least one base station, said method comprising:
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broadcasting channel rescan messages from said base station to said mobile station at predetermined intervals; and upon receipt of said messages in said mobile station, rescanning a plurality of paging channels and selecting a paging channel having the strongest signal strength. - View Dependent Claims (12, 13, 14, 15)
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16. An apparatus for reducing incidents of lost calls and for improving quality of connections in a cellular mobile telephone system, said system comprising at least one base station and at least one mobile station, comprising:
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means, provided in said base station, for broadcasting a rescan command, for rescanning a plurality of paging channels, at periodic intervals during operation of said base station; means, provided in said mobile station, for receiving the rescan operation message and performing a rescan of the plurality of paging channels; means, provided in said mobile station, for selecting an optimal paging channel in response to the rescan; and means provided in said mobile station, for monitoring messages on said optimal paging channel. - View Dependent Claims (17, 18)
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Specification