Dynamic bandwidth allocation in a passive optical access...

Multiplex communications – Communication techniques for information carried in plural... – Adaptive

Reexamination Certificate

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Reexamination Certificate

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08040918

ABSTRACT:
A method of allocating upstream bandwidth in a passive optical access network includes associating a first timer to a first upstream traffic flow and associating a second timer to a second upstream traffic flow. During a given frame period, if the first timer is at its expiration value and the second timer is not at its expiration value, then a first portion of the upstream bandwidth is allocated to the first upstream traffic flow. If a second portion of the upstream bandwidth is left, at least part of that second portion is allocated to the second upstream traffic flow before the second timer expires. If the first and second timers have not expired, then at least part of the upstream bandwidth is allocated to at least one of the first and second upstream traffic flows.

REFERENCES:
“A Broadband Optical Access System with Increased Service Capability Using Dynamic Bandwidth Assignment,” Series G: Transmission Systems and Media, Digital Systems and Networks, Digital Sections and Digital Line System—Optical Line Systems for Local and Access Networks, ITU-T G.983.4, pp. i-v, and 1-82, (Nov. 2001).
“Gigabit-Capable Passive Optical Networks (G-PON): Transmission Convergence Layer Specification,” Series G: Transmission Systems and Media, Digital Systems and Networks, Digital Sections and Digital Line System—Optical Line Systems for Local and Access Networks, ITU-T G.984.3, pp. i-v, and 1-135, (Mar. 2008).
Angelopoulos, J.D. et al., “A GPONG MAC Controller Adapting to Varying Number of Active Users, Traffic Volume and Qos” International Conference on Computer, Communications and Control Technologies 2003, Orlando, Florida, Jul. 31, Aug. 1-2, 2003, 6 sheets, (2003).
Leligou, N. et al., “D3.1 Top Level Specification of the TC Layer” IST-2001-34523-GIANT, GigaPON Access Network, XP002442650, pp. 1-45, (Nov. 29, 2002).
Tsang, I-J. et al., “D4.1 Top Level Specification of the PTSP, TC and MAC Components,” IST-2001-34523-GIANT, GigaPON Access Network, XP002288126, pp. 1-38, (Mar. 12, 2003).
Angelopoulos, J. D. et al., “Efficient Transport of Packets with QoS in an FSAN-Aligned GPON,” IEEE Communications Magazine, IEEE Service Center, New York, vol. 42, No. 2, pp. 92-98, XP001047862, (Feb. 2004).

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