The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 21, 2007
Filed:
Feb. 25, 2003
Noriyuki Ota, Ichikawa, JP;
Noriki Miki, Yokohama, JP;
Noriyuki Ota, Ichikawa, JP;
Noriki Miki, Yokohama, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
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.