Wavelength allocation for all-to-all broadcast in bidirectional optical WDM modified ring

Abstract

All-to-all broadcast is to distribute an exclusive message from each node to all the other nodes in the network. This is a vital requirement in high performance computing and communication networks including datacenter operations. Such networks may spread across thousands of nodes by means of WDM optical networks. A ring topology is an important form of network topology as it is simple, easy to deploy and fault tolerant. Few previous works suggested connecting the alternate nodes of a backbone naive ring network, and called as modified ring to support huge traffic density with decreased delay, reduced call blocking probability and increased survivability. One of the major design issues in wavelength-division multiplexed networks is to aim for reduction in the number of wavelengths usage so as to reduce network cost and complexity. In this paper, for the modified ring network, all-to-all broadcast communication is studied under single hop routing model by means of a heuristic technique, which supports to identify and group non overlapping connections. Explicit wavelength allocation techniques are given to allot unique wavelengths for various groups of non overlapping connections. The results obtained shows that wavelength requirements for a modified ring is considerably reduced than that required for a naive ring network and hence makes it attractive for optical control plane.