Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2008-06-17
2008-06-17
Perez-Gutierrez, Rafael (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S436000, C455S437000, C455S438000, C455S439000, C455S442000, C455S443000, C455S444000, C370S331000, C370S332000, C370S333000
Reexamination Certificate
active
07389111
ABSTRACT:
The present invention provides method and apparatus for facilitating base station selection/handover by a user terminal in a distributed (e.g., cellular-type) wireless communication system. In accordance with one aspect, hysteresis is adaptively determined as a function of the variance of receive signal strength fluctuations. In turn, an adaptive hysteresis factor can be obtained and used for a subsequent handover decision, for example, based on a cost function that takes into account the hysteresis. In accordance with another aspect, base station selection depends on a number of criteria, such as received signal strength, base station load, and estimated distance between a receiving user terminal and one or more base stations.
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Ajibade-Akonai Olumide
Arraycomm LLC
Blakely , Sokoloff, Taylor & Zafman LLP
Perez-Gutierrez Rafael
LandOfFree
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