Ahlswede R et al who came from the Chinese University of Hong Kong proposed the pioneering concept of network coding which changes the traditional processing way of nodes in networks.Network coding technology enables relaying nodes to encode the incoming messages before forwarding.Investigation showed that network coding can maximize the multicast capacity,save the network resources and improve the robustness of system.cheap nike shoes is an on-demand,tree-based multicast routing protocol for wireless ad hoc networks.The path between the source nodes and destination nodes is established by flooding broadcast in the routing discovery course of discount wedding prom dresses.However,flooding broadcast can lead a lot of controlling costs and the quick consuming of the nodes energy.As network coding technology can efficiently reduce the time of transmission and save the network resources,it's important and meaningful to apply network coding to the online shoes store protocol to improve its performance.blog lace wedding dresses Firstly,the MAODV protocol,network coding and secure network coding were introduced.Secure network coding in this paper refers to network coding with a digital signature scheme.To wedding gowns dresses ensure the security of multi-source network coding systems,the thesis proposed a new secure network coding called RSMNC.Then, network coding was applied to improve the performance of the custom made prom dresses protocol, which results in a new protocol NECMAODV.And then,with RSMNC secure network coding,the thesis proposed a secure network coding based MAODV protocol called SNECMAODV protocol.At last,this thesis used extended NS2 simulation platform to simulate the NECMAODV and SNECMAODV protocol which were compared with the MAODV protocol in aspects of performance under Linux operator system.The main innovative points in this thesis are as follows:(1) A new secure network coding called RSMNC was proposed.RSMNC secure network coding provided security services such as data integrity, authentication and nonrepudiation for multi-source network coding systems. (2) NECMAODV protocol was proposed by use of network coding technology. NECMAODV protocol which is based on network coding provided improved network performance and reduced energy costs.(3) Based on RSMNC secure network coding,SNECMAODV protocol was proposed.SNECMAODV protocol provided improved performance and security.(4) International authoritative simulation software NS2 was used to simulate NECMAODV and SNECMAODV protocol under Linux operation system.The simulation results showed that the transmission time of NECMAODV and SNECMAODV protocol was less than MAODV protocol.And NECMAODV protocol can save more energy than MAODV protocol.SNECMAODV protocol provided security for the network,meanwhile,the effects to network performance is small.
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