Criteria for base station selection, including handover, in...

Details Criteria for base station selection, including handover, in... Criteria for base station selection, including handover, in...

2005-10-11

2005-10-11

Trost, William (Department: 2683)

Telecommunications

Radiotelephone system

Zoned or cellular telephone system

C455S524000, C455S436000, C455S456500, C370S332000, C342S457000

Reexamination Certificate

active

06954643

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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