Automatic learning of wireless coverage
First Claim
1. A method for detecting lack of coverage by a wireless switching system that is providing wireless telecommunication service to a plurality of wireless handsets via a plurality of base stations under control of a system controller, comprising the steps of:
- detecting the inability of one of the plurality of wireless handsets to perform a handoff from one of the plurality of base stations;
monitoring by the one of the plurality of wireless handsets for any available one of the plurality of base stations with which the one of the plurality of wireless handsets can establish communication for registration;
registering on a first available one of the plurality of base stations by the one of the plurality of wireless handsets upon communication being established with the first available one of the plurality of base stations;
transmitting a message by the one of the plurality of wireless handsets to the system controller identifying the one of the plurality of wireless handsets and that the handoff had failed; and
recording an occurrence of a failed handoff from the one of the plurality of base stations by the one of the plurality of wireless handsets.
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Accused Products
Abstract
Using feedback by a system controller from wireless handsets to determine sub-areas which do not have coverage within a wireless telecommunication system. A system controller is responsive to the inability of a wireless handset to handoff to a base station, to record this fact, and requests that the wireless handset continue to monitor for a base station with sufficient transmission power. Note, the active call is lost when the handoff did not occur. When the wireless handset finds a base station that has sufficient transmission power on which to register, the wireless handset registers on this base station and sends a message to the system controller advising it of the failed handoff and the duration that occurred before a new base station was found. The system controller is responsive to this information to maintain a table for each base station from which a successful handoff could not be performed due to the lack of coverage. The system controller also instructs inactive wireless handsets to measure the transmission strength of base stations as the wireless handset moves from location to location. The wireless handset is responsive to the inability to detect a base station of sufficient strength to report this fact to the system controller once the wireless handset comes in contact with a base station that it can register on. The system controller records this information in the same table as is utilized for failed handoffs.
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Citations
12 Claims
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1. A method for detecting lack of coverage by a wireless switching system that is providing wireless telecommunication service to a plurality of wireless handsets via a plurality of base stations under control of a system controller, comprising the steps of:
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detecting the inability of one of the plurality of wireless handsets to perform a handoff from one of the plurality of base stations; monitoring by the one of the plurality of wireless handsets for any available one of the plurality of base stations with which the one of the plurality of wireless handsets can establish communication for registration; registering on a first available one of the plurality of base stations by the one of the plurality of wireless handsets upon communication being established with the first available one of the plurality of base stations; transmitting a message by the one of the plurality of wireless handsets to the system controller identifying the one of the plurality of wireless handsets and that the handoff had failed; and recording an occurrence of a failed handoff from the one of the plurality of base stations by the one of the plurality of wireless handsets. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A wireless switching system for detecting lack of coverage while providing wireless telecommunication service to a plurality of wireless handsets via a plurality of base stations under control of a system controller, comprising:
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means for detecting the inability of one of the plurality of wireless handsets to perform a handoff from one of the plurality of base stations; means for monitoring by the one of the plurality of wireless handsets for any available one of the plurality of base stations with which the one of the plurality of wireless handsets can establish communication for registration; means for registering on a first available one of the plurality of base stations by the one of the plurality of wireless handsets upon communication being established with the first available one of the plurality of base stations; means for transmitting a message by the one of the plurality of wireless handsets to the system controller identifying the one of the plurality of wireless handsets and that the handoff had failed; and means for recording an occurrence of a failed handoff from the one of the plurality of base stations by the one of the plurality of wireless handsets. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification