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Design of Fault-Tolerant Node Architecture based on SCM in Optical Burst Switching Networks  

Song Kyu-Yeop (전북대학교 정보통신학과 차세대통신망연구실)
Yoo Kyoung-Min (전북대학교 컴퓨터공학과 차세대통신망연구실)
Yoo Wan (전북대학교 컴퓨터공학과 차세대통신망연구실)
Lee Hae-Joung (국무조정실 심사평가2심의관실)
Kim Young-Chon (전북대학교 컴퓨터공학과 차세대통신망연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.8B, 2005 , pp. 514-524 More about this Journal
Abstract
In optical burst switching(OBS) networks, the ingress edge router assembles packets in the same class queue into the appropriate size of burst. A burst control packet(BCP) is generated for channel reservation of corresponding data burst and sent earlier than the corresponding data burst with an offset time. Offset time is determined considering the number of hops from source to destination and the required quality of service(QoS). After offset time, the burst data is passed through tile pre-configured optical switches without any O/E/O conversion. But a failure in OBS networks may lead to the loss of bursts until the ingress nodes receive the failure indication signal. This results in a significant degradation in QoS. Therefore, in this paper, we propose a fault-tolerant node architecture based on sub-carrier multiplexing to reduce the effects of failure in OBS networks. The Performance of the proposed fault-tolerant node architecture exhibits considerable improvement as compared with the previous ones.
Keywords
SCM; OBS; BCP; Offset time; Fault-Management; QoS;
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