Ad hoc networks which have seen drastic increase in their usage scenarios and convergence of different applications. Efficient routing is very important for mobile ad hoc networks. Existing protocols for ad hoc networks provide little support for QoS and security. In many ad hoc networks, multiple types of nodes do coexist; and some nodes have larger transmission power, higher transmission data rate, better processing capability and are more robust against bit errors and congestion than other nodes. Hence, a heterogeneous network model is more realistic and provides many advantages We present a new routing protocol called QoS routing, which is specifically designed for heterogeneous Mobile Ad Hoc Networks. QoS routing utilizes the more powerful nodes as backbone nodes (B nodes). The routing area is divided into several small, equal-sized cells. One B-node is maintained in each cell, and the routing among B-node is very efficient and simply based on location information and cell structure. A source discovers a route to destination in an on-demand way, and most of the routing activities are among B-nodes. This reduces the number of routing hops and makes the routing more efficient and reliable, since B-nodes have large bandwidth, transmission range, and are more reliable.
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[v1] 2012-08-18 21:56:02
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