A high-performance priority scheme for ATM switching systems

Article type: Research Article

Authors: Chen, Wen-Tsuen^{; ;} | Hwang, Wu-Yuin

Affiliations: Department of Computer Science, National Tsing Hua University, Hsin-Chu 30043, Taiwan

Note: [] This work was supported by the National Science Council, Taiwan, under Grant NSC 85-2213-E-007-002.

Note: [] Corresponding author. Tel.: +886 35 731064; Fax: +886 35 723694; E-mail: [email protected]

Abstract: In this paper, cell loss priority schemes in the ATM switches are studied. Many schemes had been proposed to manage buffer access for priority classes. However, these schemes suffered from poor buffer utilization or prohibitive implementation complexity. Therefore, we propose a simple priority scheme called Separate logic Queues with Complete buffer Sharing (SQCS). In the SQCS scheme, buffers are shared by priority classes and two service strategies, First-Come-First-Service (FCFS) and High-Priority First (HPF), are employed to serve priority classes. The performance of our proposed scheme is evaluated and compared with those of other priority schemes. The results indicate that our proposed scheme has a better performance and low implementation complexity. Hence, the SQCS scheme is an effective priority scheme for the ATM switching system.

Keywords: ATM, QOS, buffer management

DOI: 10.3233/JHS-1997-6101

Journal: Journal of High Speed Networks, vol. 6, no. 1, pp. 1-14, 1997