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Persistent reservation protocol for variable-length messages in WDM-based local networks

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1 Author(s)
Lee, J.H. ; Dept. of Inf. & Commun. Eng., Dongguk Univ., Seoul, South Korea

The author proposes a persistent reservation protocol in a wavelength division multiplexing (WDM)-based local network using a passive star topology. With this protocol, once a node reserves a data channel, the node persistently uses the channel until its message is completely transmitted. Therefore, the protocol needs only one tuning time for a node to begin to transmit its message, which reduces deterioration of the throughput due to tuning overhead. The proposed protocol can efficiently support variable-length messages. The network can accommodate a variable number of nodes and can operate independently of any change of the number of nodes. Hence, any `new' node can join the network at anytime without network re-initialisation. Moreover, with the protocol, data channel and destination conflicts can be avoided. Throughput-delay characteristics are analysed with a finite population model, and are verified by simulation results

Published in:

Communications, IEE Proceedings-  (Volume:148 ,  Issue: 2 )