Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2007-02-13
2007-02-13
Gary, Erika A. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S450000, C455S515000, C455S517000, C455S509000, C455S510000, C455S041200, C370S329000, C370S341000
Reexamination Certificate
active
10682084
ABSTRACT:
A wireless network has nodes, which can be accessed by wireless terminals via wireless access links, coupled via wireless transit links using multiple directional antenna beams. The nodes are self-organizing and self-adapting as nodes are added and as other changes occur. A new node uses beam scanning to listen for signals from any existing nodes and responds accordingly to join a network. Established nodes each recurrently transmit a welcome message on unused beams, to be received by a new node. Failure of transit links, e.g. due to interference on a channel frequency, is detected with automatic restoration using another frequency. Beam scanning can be enhanced using alternate overlapping beams and diversity techniques.
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Apostolopoulos, G.; Williams, D.; Kamat, S.; Guerin, R.; Orda, A.; Przygienda, T.; QoS Routing Mechanisms and OSPF Extensions; Networking Group, Request for Comments: 2676; Category: Experimental; Aug. 1999, pp. 1-50.
Ng Kris
Smith Adrian
Steer David
Teo Koon Hoo
Gary Erika A.
Nortel Networks Limited
Perez Julioz
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