Research On QoS Routing Optimized Algorithms For Wireless Multimedia Sensor Networks

Wireless multimedia sensor networks are wireless self-organizing and multi-hopnetwork systems which collects the multimedia information such as image, video andaudio via sensor nodes. As the wireless multimedia sensor networks deliver real-timeimages, audio, video and other multimedia information, the transmission ofmultimedia information need to be guaranteed with a certain quality of service (QoS).The critical issue of the QoS guarantee is the selecting of streaming routing, whichholds the task to correctly transmit the stream media data from the source node todestination node under certain constraints.Currently, route optimization technology has two main aspects of research: one isthe study on the discovery mechanism of routes between source node and destinationnode, the other is the optimization transmission of the streaming media and routinginformation.In this paper, we study the optimization QoS routing problem for wirelessmultimedia sensor networks according to the practical application of wirelessmultimedia sensor networks. The main contributions of this thesis are follows:1. Multi-path routing is an effective method to guarantee QoS in wirelessmultimedia sensor networks. In distributed wireless multimedia sensor networks, toensure nodes collaborate and find multiple paths quickly between the source node anddestination node is a hot research topic. According to the different effects of pathquality, the energy of nodes and the node degree towards the path performance, wedefine the node return model. Based on this model, a multi-path QoS routingalgorithm for single source node and single destination node wireless multimediasensor networks is proposed.2. Combined the special QoS requirements of video streaming scalable codingwith the characteristics of multi-path in wireless multimedia sensor network, thispaper proposes a multi-path allocation optimization algorithm based on thenon-cooperative game theory. Based on the characteristics of multi-path transmissionvideo stream, we bring forward a multi-path allocation game model for wirelessmultimedia sensor networks, and prove Nash equilibrium of the model. Finally, amulti-path allocation optimization algorithm is proposed.3. Because of the unsolvable problem on sink node failure in the single-sinknetwork, multi-sink node Wireless multimedia sensor network are proposed recently. However, it is of great significance to set up the optimization routing for wirelessmultimedia sensor networks with single source node and multiple sink nodes. Viaabstracting wireless multimedia sensor networks into the color gravitational fieldwhich is stimulated by more sink nodes and the process of data transmission to thesink node into the attractive role of some kind of color sink node to the data of thesame color, this paper set up a model based on field theory for wireless multimediasensor networks, the color field strength, color field potential, color field gradient andother physical quantity. On this basis, a multi-path QoS routing algorithm for singlesource node and multi-sink node wireless multimedia sensor networks are proposed.4. Considering the source node’s data transmission efficiency and fairness inwireless multimedia sensor networks for multi-source node and destination node,every source node has at least one target node to match with. A minimum weightmatching algorithm between multi-source node and multi-destination node wasproposed by building a model using matching method in graph theory to solve themulti-source node and sink node routing allocation problem. The simulation resultsshow that the algorithm can guarantee the fairness of the network, reduce networkenergy consumption and prolong the network life cycle. The whole work of this paperstarted with the wireless multimedia sensor networks QoS routing optimizationproblem. Several QoS route optimization algorithm for different applications wasproposed. By taking simulation experiments, the effectiveness of the algorithm isverified.