The Design And Implementation Of A Wireless Self-organizing Network Routing

As a new form of communication network,wireless self-organizing network has been widely used in the scene of automated battlefield,emergency and disaster relief as well as temporary conference because of its flexible deployment and distributed operation.However,factors such as irregular change of the wireless channel and frequent change of topology put forward higher requirements for routing technology,such as how to improve the reliability of data transmission,how to improve network throughput and how to reduce transmission delay.Aiming at the technical requirements of a wireless ad hoc network project with no central node,distributed operation,frequent topology changes and plug and play of external devices,this thesis gives the design and implementation of the corresponding routing system.By analyzing the node size,node mobility,network sparsity,power supply conditions and other factors of wireless ad hoc network,path length,path stability,link state,energy consumption and other parameters are taken as routing constraints in the design and development of routing system.Various optimization measures are adopted in routing discovery and routing maintenance to adapt to the dynamic changes of network topology and network resources and improve the packet distribution rate,decrease the end-to-end delay and reduce the network overhead.The main work of this thesis includes the following:(1)To meet the requirements of plug and play for external communication equipment and low protocol overhead,a two-layer routing scheme is adopted to reduce network overhead of routing protocol,save bandwidth and reduce network transmission delay.(2)A real-time topology collection mechanism is designed to meet the demand of the entire network of "communication in moving,change in communicating".By setting timer in the real-time topology mechanism,the network topology is acquired in real time to ensure the real-time performance of the routing table calculated according to the topology structure in the routing system,so as to improve the accuracy and reliability of data communication.(3)Aiming at the demand of low delay and high throughput of network transmission,the shortest path and optimal link quality routing scheme is designed to realize the effective utilization of resources and improve data transmission efficiency and communication quality.(4)Aiming at the above design scheme,the embedded development platform is oriented and the code is implemented by C/C++ languages,by recording and analyzing test results,he designed routing system meets the requirements.