Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2003-12-30
2009-12-29
Nguyen, Duc M (Department: 2618)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S456500, C455S562100
Reexamination Certificate
active
07640024
ABSTRACT:
A wireless local area network has mobile units which are provided with radios for transmitting and receiving data communications messages between the mobile units and fixed access points. The mobile units are located using signal strength for radio communications between the mobile units and the access points. At least some of the access points are provided with antennas having antenna patterns with selected pattern shape for enhancing location of the mobile units.
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Nguyen Duc M
Symbol Technologies Inc.
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