Traffic metering in data networks

Details Traffic metering in data networks Traffic metering in data networks

2008-03-25

2008-03-25

Harper, Kevin C. (Department: 2616)

Multiplex communications

Data flow congestion prevention or control

Flow control of data transmission through a network

Reexamination Certificate

active

10390385

ABSTRACT:
Methods and apparatus are provided for metering data packets having a plurality of different packet lengths in a data communications network. A token count TCis incremented at a token increment rate CIR subject to an upper limit CBS on the token count. On arrival of a packet of length L tokens, it is determined if both TC>0 and TC+n≧L, where n is a defined number of tokens. If so, the data packet is categorized as in profile and L tokens are subtracted from the token count TC. Otherwise the data packet is categorized out of profile. In some embodiments, n is set to a value in the range 0<n<(Lmax−1) where Lmaxis the maximum length of data packets to be metered. In other embodiments, n is varied in the range 0≦n≦(Lmax−1) in dependence on at least one feedback signal indicating an operational condition in the network. The degree of conformance of the metering system is determined by the parameter n, whereby the conformance level can be tuned to particular multi-length packet environments.

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