An integrated least congestion algorithm for wireless optical broadband access network

In wireless optical broadband access network (WOBAN), when a new session was established, some links probably overlapped the existing session, which leaded to congestion. To reduce the blocking probability in the overlapped links, a routing algorithm named ILCA (Integrated Least Congestion Algorithm) was designed. This algorithm integrated both multichannel technology at the wireless domain and wavelength division multiplexing at the optical domain, in which the relative queue length (RQL) in the wireless domain and RB (residual bandwidth) in the optical domain were adopted to evaluate the congestion. Simulation results showed that ILCA could enhance WOBAN throughput compared with SMIRA_1 and SPR.