| A wireless Ad Hoc network is a multi-hop self-organized communication network cosists of wireless mobile transmitters and receivers, compared with traditional radio communication networks, the terminals using the routing protocols of infrastructure networks. The wireless Ad Hoc network is an important part of the future wireless communication networks and needs no fixed network infrastructure. It shows many features such as flexible networking, anti-destroy and so on. The developments and applications of this kind of networks are very promising not only in military but also in commercial areas.Considering the dynamical of the topology, limitation of the transmitting band and the unidirectional links, the conventional routing protocols can not be used immediately. The topology of the wireless Ad Hoc network will be changed rapidly along with the moving of the nodes, so the existing routing protocols of infrastructure networks can not give the topology information of the networks in time. To distribute the control information will waste much band which maintains the topology to the network.This thesis research on the the performance of wireless Ad Hoc network based on the lacation information of the nodes and the performance of topological control and to seek the the optimized network topology construction scheme and take the research on QoS within the topology analysis. This thesis modified the routing protocols in wireless Ad Hoc networks based on the power control and cross layer design and improved the network performance in special scenarios with the aid of the intergration of routing protocols and location information of nodes. The analysis on the stability of the cotroling stream flow and the peer-to-peer problem such as routing connectivity, maximum of frame, unsymmetry and stability in wireless Ad Hoc network can improve the TCP stability of wireless Ad Hoc networks based on location information. The topology which can not only realize the network connectivity but also minimize the power consume and interference should be computed by the research on the information distribution and the usability of different topologies. This thesis take a research on the above problems and give the main contributions shown below:1. Discusses the function of power control technology in wireless sensor network, and analyzes how the power control technology affects the performance of network layer, Media Access Control (MAC) layer and Physical Layer (PHY). Based on these discussions, a cross-layer power control mechanism for energy efficiency is proposed, which is able to decrease the interference between signals of PHY, keep the connectivity of network and reduce the contention collision probability of MAC.2. The analysis for TCP controlling stream stability of wireless Ad Hoc networks in this thesis shown that the stability of TCP is worse than other networks because of the characters of this kind of networks. The thesis gave a new method to improve the stability of TCP based on the location information.3. This thesis analyzed the performance of the hybrid network based on the theory of the topological spaces and attributes. Two topological scheme are considered: linear topology and dual strip topology. New schemes for DSR and AODV algorithm, called DSR-TCCL and AODV-TCCL algorithm, are given. Because of each parameter for nodes and TCP flows are all represented and recurrence optimization is used, the new schemes can improve the performances of wireless Ad Hoc networks such as throughput, and reduce the packet loss rate, so the reliability and the efficiency of the network will be improved.4. This thesis analyzed the QoS routing with optimized cross layer design by using the attributes of the networks, and give a new QoS topology control algorithm. Discussed the QoS problem in layered model and analyzed QoS topology control algorithm. To meet the demand of QoS routing, as less as network link information is added in the new algorithm, so the power efficiency and topology optimization are improved.
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