Method for shared memory management in network nodes

Details Method for shared memory management in network nodes Method for shared memory management in network nodes

1996-10-24

1999-06-01

Ramirez, Ellis B.

39520045, G06F 1700

Patent

active

059095474

ABSTRACT:
The invention concerns a method for a multi-port node having a shared buffer memory to provide enhanced data packet buffering capacity for established virtual circuits (VC's) through the node and one of its output ports while maintaining grades of service commitments. The method admits incoming data packets to a node for an established VC based on a determination of combination of factors including the effective memory requirements for each output port as VC's are created or terminated, the portions of buffer memory in use for conveying packets through the intended output port for the incoming packet, and the total amount of available shared memory in the node. Such determinations enable the node to better decide whether admitting the incoming packet would cause a disproportionate allocation of the shared memory for the intended output port. As a consequence, a relatively high packet buffering capacity can be achieved substantially without violating grades of service commitments.

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A. Elwalid, et al., "Effective Bandwidth of General Markovian Traffic Sources and Admission Control of High Speed Networks," IEEE Infocom '93, pp. 256-264 (1993).
Schwartz, Integrated Broadband Networks, Ch. 5, pp. 181-242 (Prentice-Hall, New Jersey 1996).
A. Elwalid, et al. "A New Approach for Allocating Buffers and Bandwidth to Heterogeneous, Regulated Traffic in an ATM Node," IEEE J. on Selected Areas in Communications, vol. 13, No. 6, pp. 1115-1127 (Aug. 1995).
David E. McDysan, "ATM Theory and Application", pp. 321-322, 1994.

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