ST-FL and HTU: Tunnel Allocation and Routing Algorithm in MG-OXC Networks

The advance of WDM technologies has increased the number of available wavelengths of a fiber and requires many ports at intermediate switching nodes. Multi-granularity optical cross-connect (MG-OXC) has been proposed to handle efficiently the growing bandwidth and decrease the number of required ports and multiplexes at the nodes by switching in waveband or fiber. In this paper, we propose an efficient tunnel allocation algorithm based on link-weight and traffic flow for MG-OXC networks: static tunnel-fixed length (ST-FL). In order to use the tunnels efficiently, high tunnel utilization (HTU) routing algorithm is proposed. This algorithm increases tunnel utilization and decreases blocking probability through cost function. The performance is evaluated through simulation.