Research Of Wireless Sensor Network Routing Protocols Based On Mobile Agent

Wireless sensor network, which is made by the convergence of sensor, embedded computing, distributed information processing and wireless communication technologies, is a new information acquisition, processing and transmission technologies. It can be used in military, environmental monitoring, medical and commercial, etc. It has a wide application future. Both academia and industries are very interested it. Due to WSNs'specialty such as high density and energy limited of nodes, the existing wireless routing protocols are not fully applicable to WSN, so the design and improvement of the existing routing protocols has become a research hotspot.The article introduces the development history, concept, structure, characteristics of WSN and analyzed the key technical issues; we studied the network protocols of WSN and routing protocols on the classification system. We analyzed and compared some routing protocols from their advantages and disadvantages that proposed by oversea researcher; we choose LEACH routing protocol as the research target. We analyzed its insufficient. Based on the original algorithm, a new routing protocol is proposed, which is named LEACH based on Mobile Agent(MA-LEACH). The improvement can be summed up from two aspects: one is that MA-LEACH extend LEACH's cluster-head selection algorithm, regarding the remaining energy of nodes as a important factor, reducing the probability of the low-energy node being chosen as the cluster-head, avoiding the premature death of the low-energy node; the other is that MA-LEACH change the communication mode between sensor nodes and cluster-head by importing Mobile Agent compute mode, avoiding the meaningless energy consume for transmitting amount of sense data, moreover, this compute mode divided the data aggregation process into every node in the cluster to decrease cluster heads'energy consume and extend the lifetime of the whole wireless sensor networks.Finally, we use NS-2 simulation tool to simulate and analyze LEACH and MA-LEACH. The results demonstrate that MA-LEACH is more effective in the aspects of the network lifetime and the number of surviving sense nodes.