Low capacity mobile assisted handoff in a cellular communications network
First Claim
1. A method of controlling handoff in a telecommunications network, the network including a land system and a plurality of mobile stations, the land system including a plurality of cells, the method comprising the steps of:
- measuring continuously, by each of the mobile stations, during a call and independent Of the range from the land system, the signal quality of specified channels;
reporting, by the mobile stations, the results of said step of measuring to the land system;
dividing each cell into a first region where evaluation of measurement values is performed by the land system and a second region where the evaluation of measurement values is not performed by the land system;
performing an evaluation of the measurement values when a mobile station enters the first region; and
controlling the handoff in the land system based on the evaluation of the measurement values.
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Accused Products
Abstract
A method of controlling handoff in a telecommunications network is provided, the network including a land system and a plurality of mobile stations, the land system including a plurality of cells, the method comprising the steps of dividing each cell into a first region where evaluation of measurement values is performed and a second region where the evaluation of measurement values is not performed, performing an evaluation of measurement values when a mobile station enters the first region, and controlling the handoff based on the evaluation of measurement values.
72 Citations
50 Claims
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1. A method of controlling handoff in a telecommunications network, the network including a land system and a plurality of mobile stations, the land system including a plurality of cells, the method comprising the steps of:
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measuring continuously, by each of the mobile stations, during a call and independent Of the range from the land system, the signal quality of specified channels; reporting, by the mobile stations, the results of said step of measuring to the land system; dividing each cell into a first region where evaluation of measurement values is performed by the land system and a second region where the evaluation of measurement values is not performed by the land system; performing an evaluation of the measurement values when a mobile station enters the first region; and controlling the handoff in the land system based on the evaluation of the measurement values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of controlling handoff in a cellular network, the network including a land system and a plurality of mobile stations, the land system including at least one cell, the method comprising:
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defining a plurality of rules in the land system and sending the plurality of rules to the plurality of mobile stations; continuously determining, in a mobile station, if at least one of the rules is satisfied; sending a first message from the mobile station to the land system responsive to the at least one of the rules being satisfied; and performing evaluation of measurement values by the land system responsive to receiving the first message. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A cellular mobile radio telephone system including a land system and a plurality of mobile stations, the land system including a plurality of base stations covering corresponding geographical areas in the system, the system comprising:
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means, provided in each of the mobile stations, for continuously monitoring signal connection parameters between the mobile stations and the land system; means for dividing the area covered by each base station into an evaluation region and a non-evaluation region; means, provided in the land system, for performing evaluation of signal connection parameters when a mobile station enters the evaluation region responsive to receiving a message from the mobile station; and means provided in the land system for controlling handoff of a call handled by one of the base stations for a neighboring base station based on the evaluation of the signal connection parameters. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A cellular mobile radio telephone system comprising:
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a plurality of base stations assigned to cover corresponding geographical areas in the cellular system; a plurality of mobile stations including; means for continuously monitoring signal connection parameters between the mobile stations and the base stations; and a land system for coordinating communications between the plurality of mobile stations and the plurality of base stations including; means for dividing the area covered by each base station into a first region where evaluation of the signal connection parameters is performed and a second region where the evaluation of signal connection parameters is not performed; means for performing the evaluation of signal connection parameters when a mobile station enters the first region responsive to a message received from the mobile station; and means for controlling handoff of a call handled by one of the base stations for a neighboring base station based on the evaluation of the signal connection parameters. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50)
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Specification