한국통신학회논문지 B : 네트워크 및 융합 서비스, v.27, no.11C, pp.1164-1170
ISSN
1226-4717
Publisher
한국통신학회 (KICS)
Language
Korean
Type
Journal Article
Abstract
ACE2000 MPLS 시스템에서 MPLS 정합모듈은 ATM 정합모듈과 패킷 포워딩을 수행하는 HFMA(High performance Forwarding Engine and VC Merging board Assembly) 모듈로 구성된다. MPLS 정합모듈에서 물리층으로 입력되는 셀은 HFMA의 송신 SAR칩(RSAR) 에서 패킷으로 조립된 후 IP 룩업 제어기에서 패킷 포워딩을 수행한다. 포워딩된 패킷은 ATM 계층으로 전달되기 위해 수신 SAR칩 (TSAR)에서 셀로 다시 세그먼트된 후 ATM 셀 스위치로 전송하기 위해 ALMA(ATM Layer Module Assembly)로 전달된다. MPLS 정합모듈을 ATM 정합모듈로 이용할 때, ALMA는 직접 물리층 보도와 UTOPIA Level2 인터페이스로 연결되며, 이때 ALMA는 Master Mode로 동작하게 된다. 또한 MPLS 정합모듈에서 HFMA TSAR도 Master Mode로 동작하게 된다. 따라서 2개의 Master 모드 사이에서 인터페이스 역할을 수행할 수 있는 Slave 모드의 UTOPIA-L2 Controller가 요구된다. 본 논문에서는 Multi-Paris를 지원할 수 있는 UTOPIA-L2 Controller의 구조 및 셀 제어방법에 대해 고찰해본다.
KSP Keywords
Board Assembly, Forwarding engine, High performance, module assembly
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