A novel routing protocol for supporting QoS for ad hoc mobile wireless networks

The main purposes of this article are to lessen the influence of the fast changing network topology, rapidly varying bandwidth information, and the increasing size of routing tables on quality of service routing. Based on DSDV (Destination-Sequenced Distance-Vector) routing protocol for maintaining up-to-date routing information, the related research has to update routing tables when network topology changes; moreover, the routing tables must be updated periodically even though the network topology has not changed. To put emphasis on QoS routing, they also have to exchange routing tables by the time of bandwidth information changes. Furthermore, the size of routing tables increases with the number of mobile nodes; therefore, the precious wireless bandwidth is wasted on transmitting the large-scale routing tables. In this article, we propose an on-demand-based QoS routing protocol to mitigate these problems and to achieve the QoS requirement. The goal of this article is to discover an optimal route with minimum time delay for transmitting real-time data from a source node hop by hop to a destination node under some predefined constraints. Our contributions are as follows: our research provides a rigorous bandwidth definition and bandwidth application, a broad view of bandwidth calculation and reservation, minimizing the size of control packets and the number of control packet transmissions, and an efficient QoS routing protocol.