Research On Routing Technology Of Mobile MR Wireless Sensor Network

With the rapid growth of microelectronics industry and computer science, Wireless Sensor Networks have made great progress. Multi-Radio Multi-Channel Wireless Sensor Networks play an important role in reducing network transmission delay and improving data transmission robustness which have received considerable attention of scholars. However, Multi-Radio Multi-Channel Wireless Sensor Networks cause many problems in routing protocol design. This paper will focus on energy consumption, load balancing, communication delay and transmission reliability, the main contents are as follows:1. MR Mobile Wireless Sensor Networks typically transmit data using multi-hop routing, since node has mobility and limited energy, the transmission blocked easily due to the link failure. Faced with these problems, this paper using Recovery Domain Model, this model divide transmission path into several regions which can be recoveryed. We prove using Recovery Domain Model while minimizing the transmission delay is an NP-complete problem, then we use Integer Linear Programming to calculate the optimal value for Recovery Domain in the network and then use this optimal value to divide the network into several Recovery Domains. When a node or a link in the network fails, we use backup path in the Recovery Domain to recover. Simulation results show that using Recovery Domain Model can effectively reduce the transmission delay while only consuming little energy, this model could also achieve the balance between energy consumption and transmission delay.2. This paper researches on joint routing protocol in Wireless Sensor Networks. In the MAC layer, we first calculate the node load to evaluate the channel quality, then we propose Prime Frequency Hopping algorithm and Optimal Prime Frequency Hopping algorithm based on channel load, lastly, Dynamic Channel Assignment algorithm is proposed according to Radio utilization. In the routing layer, we propose Dynamic Joint Routing algorithm which calculate the length of multiple node disjoint path and it’s load, after that we choose some paths with lower value as transmission path. Theoretical analysis and simulation experiment show that compared with Prime Frequency Hopping, Optimal Prime Frequency Hopping can enhance the rate of hopping success. Moreover, Dynamic Joint Routing algorithm can effectively balance the network load, reduce transmission delay, prolong network lifetime.3. The energy consumption of nodes is a matter of prime importance during routing protocol design process in Wireless Sensor Networks. If energy consumption and load between noeds are balanced, network lifetime will be significantly improved.Aiming at this problem, we use Braided Multipath Routing strategy to build data passageway between multiple node disjoint paths, besides, we make flow allocation in each path according to path load. When a node fails or it’s load increases during transmission, the path which has the node will be affected as well, we can use data passageway to transfer data to other paths with higher communication quality so that the data can keep transmiting. Simulation results show that Braided Multipath Routing strategy can balance energy consumption and load among the nodes, meanwhile, this strategy effectively guarantee the transmission reliability and data integrity.