Hierarchical multi-rate multi-precedence policer

Details Hierarchical multi-rate multi-precedence policer Hierarchical multi-rate multi-precedence policer

2004-12-21

2010-06-15

Rao, Seema S (Department: 2462)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

Reexamination Certificate

active

07738382

ABSTRACT:
A hierarchical multi-rate multi-precedence policer is disclosed. The policer discards packets based on assigned precedence levels. When traffic exceeds an available service rate, the policer drops packets of lower precedence levels to make room for packets of higher precedence levels. In certain implementations, the policer also guarantees bandwidth to each level, thus preventing complete loss of lower precedence traffic when there is a large amount of higher precedence traffic.

REFERENCES:
patent: 2003/0152084 (2003-08-01), Lee et al.
patent: 2006/0133279 (2006-06-01), Le Faucheur et al.
Heinanen et al., IETF RFC 2698, “Two Rate Tree Color Marker”, Sep. 1999.
Shenker et al., IETF RFC 2212, “Specification of Guaranteed Quality of Service”, Sep. 1997.
F. Baker et al., “Implementing MLPP for Voice and Video in the Internet Protocol Suite”, IETF Internet Draft, Feb. 15, 2004.
F. Baker at al., “MLEF Without Capacity Admission Does Not Satisfy MLPP Requirements”, IETF Internet Draft, Feb. 15, 2004.
A. Charny et al., “Supplemental Information for the New Definition of the EF PHB (Expedited Forwarding Per-Hop Behavior”, RFC 3247, Internet Engineering Task Force, Mar. 2002.
B. Davie et al., “An Expedited Forwarding PHB (per-Hop Behavior)”, RFC 3246, Internet Engineering Task Force, Mar. 2002.
J. Heinanen et al., “A Two Rate Three Color Marker”, RFC 2698, Internet Engineering Task Force, Sep. 1999.
J. Heinanen et al., “S Single Rate Three Color Marker”, RFC 2697, Internet Engineering Task Force. Sep. 1999.
M. Pierce et al., “Requirement for Assured Service Capabilities in Voice over IP”, IETF Internet Draft, Jun. 23, 2003.

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