Multiplex communications – Communication techniques for information carried in plural... – Transmission bandwidth conservation
Reexamination Certificate
2007-08-21
2007-08-21
Jain, Raj K. (Department: 2616)
Multiplex communications
Communication techniques for information carried in plural...
Transmission bandwidth conservation
C370S465000, C370S468000, C370S470000, C370S480000, C370S395210, C370S395420
Reexamination Certificate
active
10374134
ABSTRACT:
A bandwidth allocation method used in a point-to-multipoint communication system, for efficiently using the bandwidth while shortening delay time. A central unit quantizes round-trip propagation delay times of subsidiary units, groups the subsidiary units, assigns the same quantized round-trip delay time to the same group, and allocates allocation request signal bandwidths to the subsidiary units of the same group when receiving allocation requests within a predetermined period. Based on the quantized round-trip delay time, the bandwidths are located as close as possible while the bandwidths do not temporally overlap with each other and as temporally ahead as possible. Data signal bandwidths are also allocated to the subsidiary units of the same group, based on the quantized round-trip delay time and requested amounts of data, in a manner such that the bandwidths are located as temporally ahead as possible but temporally behind in comparison with the allocation request signal bandwidths.
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Summary of Items 1 and 2 above.
Miki Noriki
Ota Noriyuki
Harness & Dickey & Pierce P.L.C.
Jain Raj K.
Nippon Telegraph and Telephone Corporation
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