Multiplex communications – Communication techniques for information carried in plural... – Combined time division and frequency division
Reexamination Certificate
2011-01-25
2011-01-25
Vu, Huy D (Department: 2461)
Multiplex communications
Communication techniques for information carried in plural...
Combined time division and frequency division
C370S344000, C370S348000, C370S443000, C370S447000
Reexamination Certificate
active
07876786
ABSTRACT:
Dynamic time-spectrum block allocation for cognitive radio networks is described. In one implementation, without need for a central controller, peer wireless nodes collaboratively sense local utilization of a communication spectrum and collaboratively share white spaces for communication links between the nodes. Sharing local views of the spectrum utilization with each other allows the nodes to dynamically allocate non-overlapping time-frequency blocks to the communication links between the nodes for efficiently utilizing the white spaces. The blocks are sized to optimally pack the available white spaces. The nodes regularly readjust the bandwidth and other parameters of all reserved blocks in response to demand, so that packing of the blocks in available white spaces maintains a fair distribution of the overall bandwidth of the white spaces among active communication links, minimizes finishing time of all communications, reduces contention overhead among the nodes contending for the white spaces, and maintains non-overlapping blocks.
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Bahl Paramvir
Chandra Ranveer
Moscibroda Thomas
Narlanka Gopala Sri Hari
Wu Yunnan
Duffy James P
Lee & Hayes PLLC
Microsoft Corporation
Vu Huy D
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