標題: | Quality of service guarantee in a combined input output queued switch |
作者: | Lee, TH Kuo, YW Huang, JC 傳播研究所 Institute of Communication Studies |
關鍵字: | quality of service;combined input output queued switch;matching;exact emulation |
公開日期: | 1-二月-2000 |
摘要: | Combined input output queued (CIOQ) architecture such as crossbar with speedup has recently been proposed to build a large capacity switch for broadband integrated services networks. It was shown that, for a speedup factor of 2, a CIOQ switch can achieve 100% throughput with a simple maximal matching algorithm [1]. Achieving 100% throughput, however, is not sufficient for per-connection quality of service QoS) guarantee. In [2],[3], it is proved that a CIOQ switch with a speedup factor of 2 can exactly emulate an output queued (OQ) switch if stable matching is adopted. Unfortunately, the complexity of currently known algorithms makes stable matching impractical for high-speed switches. In this paper, we propose a nerv matching algorithm called the least cushion first/most urgent first (LCF/MUF) algorithm and formally prove that a CIOQ switch with a speedup factor of 2 can exactly emulate an OQ switch which adopts any service discipline for cell transmission. A potential implementation of our proposed matching algorithm for strict priority service discipline is also presented. |
URI: | http://hdl.handle.net/11536/30737 |
ISSN: | 0916-8516 |
期刊: | IEICE TRANSACTIONS ON COMMUNICATIONS |
Volume: | E83B |
Issue: | 2 |
起始頁: | 190 |
結束頁: | 195 |
顯示於類別: | 期刊論文 |