A dual channel routing scheme in MANET networks

In QoS routing for wired networks, multiple path routing is popularly used. Because of excessive routing overhead, algorithms are not well suited for MANET networks. The IEEE 802.3 DCF standard allows for the use of multiple channels available at the physical layer, by improving the capacity of MANET networks by using multiple channel interfaces, a dual channel routing (DCR) scheme is introduced that proactively maintains all nodes´ location information based on periodic exchanges of these information in one channel. The location advertisements are distributed to all nodes in the network. The resulting replicated distributed database represents the entire network topology. Every node uses this connectivity map to calculate the shortest path to every other node. Then, source transmits data packet in another channel. This traffic distribution efficiently utilizes available network resources and prevents nodes of the route from being congested in heavily loaded traffic situations. DCR is a hybrid proactive/reactive scheme. Because there is no interference between two channels, the results of simulation show that the scheme can improve networks performance.