Multiplex communications – Channel assignment techniques – Combining or distributing information via time channels...
Patent
1995-12-08
1997-08-05
Chin, Wellington
Multiplex communications
Channel assignment techniques
Combining or distributing information via time channels...
370462, 370468, H04J 314, H04J 316
Patent
active
056549687
ABSTRACT:
The present invention is directed to maximizing efficiency, or throughput, in a communications network where plural bidding devices arbitrate for access to a central device, while fairness in the bid arbitration process is maintained. Such enhanced operation is achieved by providing at least one central device, such as a hub, with an ability to receive bid indices representing bid success rates from each of a plurality of secondary devices. The plurality of secondary devices can be remote units referred to herein as launch pads. The bid indices represent the ability of each launch pad to successfully arbitrate for access to the hub. The hub collects the bid indices from all of the active launch pads and evaluates (for example, averages) them over a reasonable period of time to create a hub goal index. The hub goal index is then broadcast back to all of the launch pads so that each of the launch pads can evaluate its own bid index relative to the hub goal index, and then use this comparative information to modify its frequency of bidding for future access to the hub. As a result, launch pads tend to spread out into different bidding groups, each bidding group having a unique bid-to-data-transfer cycle time. At the same time the hub creates the hub goal index, the hub also creates a group bid index for each launch pad bidding group. The hub continually monitors a worst group bid index and uses it to modify a number of available time slots during which the launch pads can bid for access to the hub.
REFERENCES:
patent: 5303234 (1994-04-01), Kou
patent: 5384777 (1995-01-01), Ahmadi et al.
Chin Wellington
Multipoint Networks
Vu Huy D.
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