Multiplex communications – Diagnostic testing – Determination of communication parameters
Reexamination Certificate
2011-08-23
2011-08-23
Sefcheck, Gregory B (Department: 2477)
Multiplex communications
Diagnostic testing
Determination of communication parameters
C370S324000, C370S395400, C370S458000
Reexamination Certificate
active
08005002
ABSTRACT:
One embodiment of the present invention provides a system that performs a query-based convergecast scheduling in a convergecast network, which includes a base-station and a plurality of nodes. During operation, the system receives a convergecast tree for the convergecast network. Each node in the convergecast tree is associated with a hop-count to the base-station through a specific branch and each node can generate zero or more packets to transmit. Next, the system initializes a query from the base-station, wherein the query is successively propagated to the nodes through the branches. In response to the query, the system computes distributed-timing-information indicating a packet transmission schedule for the nodes. The system next aggregates the distributed-timing-information associated with the nodes toward the base-station through the branches. The system then forwards the aggregated distributed-timing-information to the plurality of nodes. Finally, each node constructs an optimized-convergecast-schedule for the convergecast tree based on the aggregated distributed-timing-information.
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patent: 7505450 (2009-03-01), Castagnoli
patent: 7675884 (2010-03-01), Ye
patent: 2005/0157698 (2005-07-01), Park et al.
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Gandham Shashidhar R.
Huang Qingfeng
Zhang Ying
Palo Alto Research Center Incorporated
Park Vaughan Fleming & Dowler LLP
Sefcheck Gregory B
Shivers Ashley L
Yao Shun
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