Research On Routing Strategy Based On Network Coding Under Energy Constraint In MDTN

With the rapid development of Internet technology,smart communication devices such as:mobile phones and iPads.The nodes in the Mobile Delay Tolerant Network(MDTN)are mainly composed of smart communication devices,therefor,the mobile delay tolerant network become a hotspot in Ad hoc network.The nodes in mobile delay tolerant network are random mobile,non-stable links in ends,intermittent connections,and long delays.This results in node transmit message is limited in once contact in mobile delay-tolerant network.In order to transmit more messages in once contact,network coding technology is introduced.The network coding is a technology that combination of coding and routing,which effectively improves the above issues.The mobile devices in mobile delay tolerant network have a lot of advantages,such as: mobility,portability and so on.But there are also disadvantages,such as: battery energy limited,node sociality and so on.When the energy of node in the network is exhausted,it will affect the entire network performance.Therefore,lead energy management strategy into the routing strategy based on the network coding will greatly improve the performance of the mobile delay tolerant network.In this thesis,firstly,I study the existing MDTN routing protocols,routing protocols based network coding in MDTN and energy constraint mechanisms.Secondly,I propose a routing strategy based on network coding with energy constraint.This strategy is based on the network coding routing,the energy constraint and node sociality are added as restrictions.The strategy first divides the nodes according to the social level of the nodes,then,divides the nodes according to the nodes remaining energy rate,finally,comprehensively considers the sociality and the remaining energy level of the nodes to judge whether the nodes have the coding capability or have the forwarding capability.Through the opportunity network simulator(ONE)to achieve the routing strategy proposed in this thesis,and compare the routing strategy proposed in this thesis with the routing that constraints of the local attribute,select the optimal one,and then,compare and analyze with some improved classic routing strategies.Experimental results show that the routing strategy proposed in this thesis can effectively improve the delivery rate,reduce delay and reduce network overhead.