Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2003-10-08
2008-10-28
Appiah, Charles N (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S434000, C455S432100, C455S435100, C455S435100, C455S513000
Reexamination Certificate
active
07444150
ABSTRACT:
Upon power on, a terminal performs cell selection, finds the most suitable cell to receive communication service, and camps on this cell (the serving cell). The terminal thereafter performs “C2-based” cell reselection if a better cell is found, “non-C2 based” cell reselection if the current serving cell cannot be camped on, “power scan” cell reselection if the C2-based or non-C2 based cell reselection fails, and cell selection if the power scan cell reselection fails. For the power scan cell reselection, the terminal initially performs a power scan and obtains received signal strength measurements for a list of RF channels. This list includes fewer than all RF channels evaluated by the cell selection. The terminal then acquires and decodes the N strongest RF channels, preferably in parallel, to find a suitable cell. The terminal selects a suitable cell, if found, with the highest C2 value as the new serving cell from which to receive service.
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Constandse Rodger
Rick Roland
Appiah Charles N
Karikari Kwasi
QUALCOMM Incorporated
Rouse Thomas R.
Seo Howard
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