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Study On Mobility And Routing Technology Of Wireless Sensor Networks

Posted on:2009-03-31Degree:DoctorType:Dissertation
Country:ChinaCandidate:B WangFull Text:PDF
GTID:1118360278965423Subject:Computer application technology
Abstract/Summary:PDF Full Text Request
Wireless sensor network (WSN) has been a new research area for some years. WSN consists of a large amount of wireless sensor nodes integrated with sensing, computing and communication modules. It senses information from physical world and transmits the messages to the users. The features of self-adaptive, ruin-resistant, easy deployment and low cost enable WSN to conduct many special applications, such as environment surveillance, smart homing and military application. To extend WSN's lifetime, ensure its easy usage and guarantee the effectiveness of its data transmission is an important issue for WSN. This thesis focuses on the mobility of sink, network topology and routing algorithms. The main contributions of the thesis are as follows:(1) Deploy single mobile sink in event-driven scenarioBased on the event-driven scenario, we analyze the deployment of single mobile sink. We find the optimal mobility trajectory of sink which can balance the network lifetime and event delivery delay, and deduce the relation between the trajectory parameters and network performance. The simulation compares the performance between optimal trajectory and other trajectories, and the results show that it is optimal.(2) Deploy multiple mobile sinks in event-driven scenarioBased on the first research achievement, we study the two different strategies when there are two mobile sinks in the network, which are moving in the same region and in the divided regions. The results show that the former strategy has an optimal trajectory radius, and it is better than the latter one. The relation between the number of mobile sinks and network performance is also been discussed.(3) Mobile Augmented Visual Service and the sink capacityWe first introduce a novel application of wireless sensor network: Mobile Augmented Visual Service (MAVS), describe its application scenario, summarize the network architecture and application feature, and analyze the challenges in MAVS. In MAVS, the subscribers act as data sinks and competitively achieve data from the sensor nodes, this is different from the traditional applications. Therefore, we analyze the capacity of sink in MAVS, and find the bottleneck nodes in the network will constrain the capacity of sink extremely.(4) Flow Constrained Multicast RoutingWe present a heuristic algorithm for multicast routing in MAVS, which called Flow Constrained Steiner Tree (FCST). The computer complexity and performance of this algorithm are analyzed. And the simulation results show that FCST can not only reduce the cost of multicast tree, but also support more multicast groups.
Keywords/Search Tags:Wireless Sensor Network, Event-Driven, Mobility, Multicast, Sink Capacity
PDF Full Text Request
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