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Real-time estimation and dynamic renegotiation of UPC parameters for arbitrary traffic sources in ATM networks

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2 Author(s)
Mark, B.L. ; C&C Res. Labs., NEC USA, Princeton, NJ, USA ; Ramamurthy, G.

This paper presents a robust and flexible real-time scheme for determining appropriate parameter values for usage parameter control (UPC) of an arbitrary source in an asynchronous transfer mode network. In our approach, the UPC parameters are chosen as a function of the statistical characteristics of the observed cell stream, the user's tolerance for traffic shaping, and a measure of the network cost. For this purpose, we develop an approximate statistical characterization for an arbitrary cell stream. The statistical characterization is mapped to a UPC descriptor that can be negotiated, with the network. The selected UPC descriptor is optimal in the sense of minimizing a network cost function, subject to meeting user-specified constraints on shaping delay. The UPC estimation scheme is extended to adapt to slow time-scale changes in traffic characteristics via dynamic renegotiation of the UPC parameters. We illustrate the effectiveness of our methodologies with examples taken from MPEG video sequences

Published in:

Networking, IEEE/ACM Transactions on  (Volume:6 ,  Issue: 6 )

Date of Publication:

Dec 1998

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