PNNI 망에서 효율적인 ABR 트래픽 전송률 제어에 관한 연구

A Study on Efficient Transmission Rate Control of ABR Traffic in PNNI Networks

  • 발행 : 2005.08.01

초록

본 논문에서는 ABR(Available Bit Rate) 트래픽의 흐름제어를 방식들을 분석하고, 지연이 큰 PNNI망에서 VS/VD 스위치를 이용하여 효율적으로 ABR 트래픽을 제어하여, 공평한 전송율을 계산할 수 있는 알고리즘을 제안하였다. 제안된 알고리즘에서는 전송율을 계산하기 위하여 정확하고 공평한 분배를 계산할 수 있는 ER(Explicit Rate) 방식의 FMMRA(Fast Max-Min Rate Allocation)를 사용하였다. 그리고, 지연이 많이 된 상태에서도 큐에 있는 셀을 서비스하고 드레인 하기 위하여, VD에서 VS로 전달된 큐 길이 정보를 이용하여 전송율을 계산함으로서 공평한 셀 서비스 분배를 할 수 있었다. 컴퓨터 시뮬레이션을 통하여 제안된 알고리즘의 성능을 평가하였으며, 그 결과 만족할만한 성능을 얻을 수 있었다.

In this paper, we analyze previous flow control algorithm for serving ABR traffic, and then propose the algorithm which calculate fair transmission rate and control efficiently ABR traffic using VS/VD switch which has an effect on PNNI environment with long delay. For getting the transmission rate, the proposed algorithm use FMMRA as ER scheme which calculate exactly the fair share. And, in large delay state, we can obtain fair cell sharing by calculating transmission rates which obtained by transmitted queue length information of VD to VS for serve and drain cell in queue Through the computer simulation, we evaluate the performance of proposed algorithm. According to the results, the proposed algorithm shows good performance.

키워드

참고문헌

  1. S. Sathaye, 'ATM Forum Traffic Management Specification, Version 4.0,' ATM Forum Technical Committee, Mar. 1996
  2. A. Arulambalam et al, 'Allocating Falr Rates for Avallable Bit Rate Service in ATM Networks,' IEEE Communications Magazine, vol. 34, no. 11, Nov. 1996
  3. W. K. Lai, J. Y. Tsal, 'A flow control scheme on ATM networks with max-min falrness,' Computer Communications, vol. 22 no. 6, Apr. 1999
  4. R. Jain et al, 'Source Behavior for ATM ABR Traffic Management: An Explanation,' IEEE Communications Magazine, vol. 34, no. 11, Nov. 1996
  5. C. Lefelhocz, et al, 'Congestion Control for Best-Effort Service : Why We Need a New Paradigm,' IEEE Network, Feb. 1996
  6. L. Roberts, 'Enhanced PRCA(Proportional Rate-Control Algorithm),' AF-TM 94-0735RI, Aug. 1994
  7. Mitsuaki Kakemizu, 'Global PNNI Intemetworking Architecture for ATM Public Networks', Proceedings of the 1999 IEEE International Conference on Communications, Vol. 2, 1999
  8. B. Awerbuch, Y. Du, Y. Shavitt, 'The Effect of the Network Hierarchical Structure on Performance of ATM PNNI Hierarchical Routing,' IEEE ICCCN'98, Oct, 1998
  9. A. R. Rogozini, E. Al, 'Analysis of the Performance of a Hierarchical PNNI Network,' Proceeding of the 1999 2nd International conference on ATM, 1999