ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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Performance Analysis of the UPC/NPC Algorithm for Guaranteed QoS in ATM Networks

  • Kim, Yong-Jin (Standardization Strategy Planing Team at Protocol Engineering Center, ETRI) ;
  • Kim, Jang-Kyung (Standard Testing Team, Protocol Engineering Center, ETRI) ;
  • Lee, Young-Hee (School of Information and Computer Engineering, Information and Communications University) ;
  • Park, Chee-Hang (Information Support Division, Electronics and Telecommunications Research Institute)
  • Published : 1998.09.30
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Abstract

It is well known that if usage parameter control/network parameter control (UPC/NPC) functions are used together with a cell loss priority control scheme in ATM networks, the measurement phasing problem can occur. This makes it difficult for a network provider to define and commit the cell loss ratio as a QoS parameter. To solve the problem, we propose a new UPC/NPC algorithm. By using the proposed UPC/NPC algorithm, we can define the cell loss ratios for CLP = 0 and CLP = 0+1 cell streams without the measurement phasing problem under any conditions. We analyzed the performance of the proposed UPC/NPC algorithm. Using a discrete time model for the UPC/NPC architecture with a discrete-time semi-Markov process (DSMP) input model, we obtained the cell discarding probabilities of CLP = 0 and CLP = 0+1 cells streams and showed that more CLP = 0 cells are accepted compared to what was proposed in ITU-T.

Keywords

References

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