Three-stage clos-network switch architecture with buffered center stage for multi-class traffic = 다중 계층의 트래픽을 위한 버퍼형 중간단을 가진 삼단 Clos 네트워크 스위치

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Memory-space-memory (MSM) arrangement is a popular architecture to implement three-stage Clos network switches with distributed arbitration. The scalability of this architecture, however, is limited by the round-trip communication delay between the first and the second stages. Virtual output queue (VOQ) cannot completely remove the blocking in the buffered modules under multi-class traffic conditions. In this paper, we propose a competition-free memory-memory-memory $(CFM^3)$ switch which is a three-stage Clos network switch with buffered center stage. The $CFM^3$ deploys buffered modules in all stages to simplify communication between stages. To reduce the blocking, each module is equipped with a set of buffers fully separated according to the destinations, classes of packets and the input ports of the module. Despite the buffered center stage, $CFM^3$ is free from reordering problem due to simple control mechanism. Memory overhead to implement the $CFM^3$ switch is negligible. Simulation result shows that the delay of the proposed $CFM^3$ switch closely approaches that of the ideal Output Queued switch under multi-class traffic conditions when strict priority policy popularly used for class-based switch is deployed. $CFM^3$ achieves 100% throughput under uniformly distributed four-class traffic with strict priority policy while traditional MSM switch achieves only 77% throughput.
Advisors
Kyung, Chong-Minresearcher경종민researcher
Description
한국과학기술원 : 전기및전자공학전공,
Publisher
한국과학기술원
Issue Date
2006
Identifier
254388/325007  / 000995001
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전기및전자공학전공, 2006.2, [ viii, 64 p. ]

Keywords

multi-class traffic; Scalable switch; three-stage switch; 삼단 스위치; 다중계층 트래픽; 확장형 스위치

URI
http://hdl.handle.net/10203/35335
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=254388&flag=dissertation
Appears in Collection
EE-Theses_Ph.D.(박사논문)
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