Method and apparatus enabling multiple access for multiple servi

Details Method and apparatus enabling multiple access for multiple servi Method and apparatus enabling multiple access for multiple servi

1997-04-03

2000-03-21

Kizou, Hassan

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

370474, H04L 1266

Patent

active

060410515

ABSTRACT:
The specification relates to a broadband multiple access protocol for bi-directional hybrid fiber/coax (HFC) networks. The protocol supports downstream broadcast transmission from headend to cable modem, and also provides for allocation of bandwidth for cable modems to transmit back to the headend. Although the present invention is described in relation to an HFC network, it is also equally applicable to a cellular wireless communications environment. The protocol supports different access modes such as STM, ATM, and VL; within each subframe of a subframe/frame/masterframe structure. The protocol adapts to changing demands for a mix of circuit and packet mode applications and allocates upstream and downstream bandwidth in response to the a variety of bursty and isochronous traffic sources. In order to satisfy the quality of service requirements of varied applications, while maintaining high bandwidth efficiency, the protocol utilizes a subframe structure with subframe partitioning into regions; one region dedicated to STM payload transmission, a second region dedicated to ATM cell transmission, and a third region dedicated to VL payload transmissions.

REFERENCES:
patent: 5012469 (1991-04-01), Sardana
patent: 5144619 (1992-09-01), Munter
patent: 5173901 (1992-12-01), Desomer
patent: 5570355 (1996-10-01), Dail et al.
patent: 5790806 (1998-08-01), Koperda

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