Open AccessPerformance Analysis of the UPC/NPC Algorithm for Guaranteed QoS in ATM Networks
Author(s) -
Kim Yongjin,
Kim Jangkyung,
Lee Younghee,
Park CheeHang
Publication year - 1998
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.98.0198.0301
Subject(s) - computer science , quality of service , algorithm , markov chain , markov process , process (computing) , scheme (mathematics) , real time computing , computer network , mathematics , mathematical analysis , statistics , machine learning , operating system
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 cell streams and showed that more CLP = 0 cells are accepted compared to what was proposed in ITU‐T.