Journal of the Korean Institute of Telematics and Electronics S (전자공학회논문지S)
- Volume 35S Issue 11
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- Pages.44-52
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- 1998
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- 1226-5837(pISSN)
Node Architecture and Cell Routing Strategies for ATM Applications in WDM Multihop Networks
WDM 다중홉 망에서 ATM 응용을 위한 노드 구조 및 셀 라우팅 기법
- Lee, Ho-Suk (Dept. of Computer Eng., Chonbuk Nat'l Univ.) ;
- Lee, Cheong-Hun (Dept. of Computer Eng., Chonbuk Nat'l Univ.) ;
- So, Won-Ho (Dept. of Computer Eng., Chonbuk Nat'l Univ.) ;
- Kwon Hyeok-Jung (DAEWOO Telecom Ltd.) ;
- Kim, Yeong-Cheon (Dept. of Computer Eng., Chonbuk Nat'l Univ.)
- Published : 1998.11.01
Abstract
In this paper, we proposed a node architecture and cell routing strategies for ATM applications in WDM multihop networks. The proposed node architecture employs the optical delay loop for storing the cell which is failed in out-link contention. This optical delay loop allows the delay of one cell without the electro-optic conversion. Therefore, we can get the advantages of S&F(Store-and-Forward) routing in Deflection-based all-optical networks. To support the ATM applications efficiently. we considered the transmission priority of ATM cell so that high priority cell can be transmitted with lower loss and shorter delay than low priority one. Two kinds of routing strategies are designed for this architecture: Scheme-Ⅰand Scheme-Ⅱ. Scheme-Ⅰapplies S&F routing to high cell and Deflection routing to low cell, i.e., high cells are routed along the shortest path based on S&F routing, but low cells are deflected or lost. Schem-Ⅱ is similar to Scheme-Ⅰexcept that low cells can occupy the optical loop if it is available. This Scheme-Ⅱ increases the utilization of network resources without decreasing the throughput of high cell by reducing the low cell loss rate when traffic load is low. Simulation results show that our routing strategies have better performance than conventional ones under non-uniform traffic as well as uniform traffic.
본 논문에서는 WDM 다중홉 망에서 효율적인 ATM 응용 서비스를 제공하기 위한 노드 구조 및 셀 라우팅 기법을 제시하였다. 제안된 WDM 노드의 파장 교환 구조는 MSN 구조의 논리적 토폴로지를 기반으로 하고, 내부에 광 지연루프를 사용하여 전
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