Enhanced dynamic source routing (En-Dsr) with QOS based routing for IPV6 in ad Hoc Networks

Mobile ad hoc network comprises a collection of mobile devices such as laptops that connect to each other wirelessly and they mutually agreed to forward data packets on behalf of the mobile node that initiates transmission within the network. Without any centralized management system, mobile nodes use routing algorithm to perform the routing process from finding a route to sending data to their recipients. They are usually deployed in the area of catastrophe, meeting or conferences where impromptu connections are required and no centralized infrastructure is readily available. Although ad hoc connections and mobility are advantageous, mobile ad hoc network is exposed with wireless disruptions. Moreover, movement in within the topology changes the network topology unpredictably at unpredictable time.As a newly enhanced algorithm, routing process in En-DSR will be carried out with Quality-of-Service (QoS) in the transmission. Over a highly dynamic ad hoc network, this enhanced algorithm selects route that is more stable by measuring the stability of each intervening nodes in the route. This effort made to improve the network performance where highly dynamic mobile nodes behave unpredictably over the time which will affect on-going transmission. With stable routes for transmission, retransmission is minimized and network resources can be efficiently used. By utilizing IPv6 Flow Label in the IP packet header, resource reservation can be done on different application requests. In comparison with conventional Dynamic Source Routing, En-DSR performed relatively well. Despite the increasing length of the source route header, a new combination of fields in IP header is used to label the stream of data transmission as flow that reduces the per packet overhead as well as simplifying the header processing. Then, better QoS can be provided to the transmission and improve the network performance entirely