Method and apparatus for selecting a communication channel in a communication network
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United States of America Patent
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Feb 6, 2001
Grant Date -
N/A
app pub date -
May 28, 1999
filing date -
May 28, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for reducing power consumption in a roaming portable communication device is described. Various embodiments include optimizing a channel acquisition scan, or pre-scan, and a background scan in order to delay the reaction to a suspected loss of coverage to prevent unnecessary roaming and the associated power consumption. A list of received signal strengths is generated for a number of possible channels. Only those channels with a received signal strength above a threshold level are retained. The received signal strength of the remaining possible channels is retested. The selected channel is determined from the remaining possible channels by comparing the received signal strength of the last channel used, the last channel attempted (if available), and a best channel having the highest received signal strength. In this manner, a method and apparatus of analyzing and organizing base station channel strengths for subsequent channel acquisitions based on the power consumption costs for acquisition of a new channel is provided.
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