Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2006-02-28
2006-02-28
Nguyen, Brian (Department: 2661)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S447000
Reexamination Certificate
active
07006469
ABSTRACT:
A method and protocol for dynamic downstream and upstream frequency assignment in a localized microwave distribution system. Downstream frequencies can be assigned via a base station periodic broadcast of a frequency assignment table for a home common control channel in each base station downstream frequency. Customer premise equipment monitors the home common control channel for a frequency assignment message, which preferably includes a table mapping each customer premise equipment, or that equipment for which there has been no recent upstream communication. Downstream frequencies may also be assigned by a customer premise equipment request to a base station sent over a common control channel associated with an upstream frequency associated with a downstream frequency identified during a scan of downstream frequencies. A modified aloha contention algorithm is used if multiple customer premise equipment requests conflict. Upstream frequency and time slot requests are done in similar fashion, with a customer premise equipment sending a request over either common control channel of a currently assigned upstream frequency or a common control channel associated with a downstream frequency with which the customer premise equipment is associated.
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Cilia Andrew
Roark Charles W.
Stiles Mitchel B.
Weiner Douglas B.
Baker & Botts L.L.P.
Cisco Technology Inc.
Nguyen Brian
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