Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
2005-06-14
2005-06-14
Maung, Nay (Department: 2684)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S338000, C370S352000, C370S356000, C370S401000, C370S469000
Reexamination Certificate
active
06907017
ABSTRACT:
Handoff of (i) a mobile wirelessly communicating device—a mobile—between (ii) a plurality of stationary base stations within cells within a domain of (iii) a stationary gateway router all within (iv) a communications network based on the Internet Protocol (IP) is without interchange of control, and responsive to the mobile, only. The gateway router assigns to the mobile at a time before the handoff IP addresses suitable for the mobile to connect to the gateway router through all the plurality of base stations of the domain. Unilaterally deriving a handoff decision to switch base stations, the mobile directs its wireless communications link to a new base station where signal level registration is performed. Responsive to a link layer trigger at the new base station, the gateway router is informed of the handoff, and both the router and the mobile independently construct the mobile's new IP address. Handoff latency is typically 40 ms.
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Acampora Anthony
Reddy Joseph Soma
Fish & Richardson P.C.
Maung Nay
Sharma Sujatha
The Regents of the University of California
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