On dynamically establishing and terminating isochronous message streams in WDMA-based local area lightwave networks

Abstract

To complement the prior work of Kung-Ying Tyan, Chao-Ju Hou, Bin Wang and Ching-Chih Han (see Proc. IEEE 17th Real-Time Systems Symposium, Washington DC, 1996), we address the problem of dynamically establishing/terminating real-time message streams in response to call setup/clear requests in single-hop star-coupled WDMA-based optical networks. We consider a network architecture in which N stations are connected to a star coupler with W data channels (W/spl les/N) and one control channel. Each of the W data channels is slotted and shared by the N stations by means of time division multiplexing. The control channel is used for stations to coordinate the call establishment and termination operations. We propose a distributed, dynamic slot allocation scheme to allocate/deallocate, in response to call setup/clear requests, time slots on the W data channels to message streams, with the objective of meeting message deadlines. We formally prove the properties, and the correctness of, the proposed dynamic slot allocation scheme.