Author : Donglai Sun
Publisher :
ISBN 13 :
Total Pages : 107 pages
Book Rating : 4.:/5 (868 download)
Book Synopsis Exploring QoS and Security in Wireless Ad-hoc Network by : Donglai Sun
Download or read book Exploring QoS and Security in Wireless Ad-hoc Network written by Donglai Sun and published by . This book was released on 2012 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wireless Ad-hoc Network is an emerging communication technology over the last decade. As this kind of network can be easily implemented without requiring fixed infrastructures, it is considered as one of the most important solutions for building distributed wireless systems. Obviously, the physical channel in wireless ad-hoc network significantly distinguishes itself from the other existing networks. For example, fluctuations caused by unstable wireless channel are more severe. From an ordinaryperspective, these characteristics are treated as disadvantages, and have to be eliminated in network design.Burgeoning technology called physical layer security represents a completely subversive attitude to these issues. Unique physical channel is exploited to provide additional security guarantee. However, new problems are also introduced into the system. Transmission rate of links with physical layer security is largely restricted due to the overhead used for secure mechanism. Network performance (e.g., throughput and delay) is accordingly affected. Thus, QoS turns out to be a major concern innetworks with physical layer security. In this research, the focus is on the problem of how to guarantee QoS and physicallayer security simultaneously in wireless ad-hoc networks. Since traditional solutions for QoS are always implemented in upper layers of the network structure, they can hardly provide full support to the new secure physical layer. Furthermore, as services without secure requirement still exist in the network, the coexistence of secure and regular physical layer has to be taken into consideration. These issues have set new demands of corresponding MAC layer scheduling protocols. Therefore, we summarizethe general characteristics of physical layer security technology, based on which SecDCF, a MAC layer scheduling framework is presented. An interface is also designed to enable the integration of different scheduling policies. Furthermore, diversifiedrequirements from different scenarios are studied, and scheduling policies are then derived to be applied with SecDCF.Corresponding numerical analysis and simulations are also carried out to evaluate our research. As a conclusion, it is illustrated in this dissertation that with elaborately designed MAC layer scheduling schemes, it is possible to exploit the rich physical layercharacteristics for achieving both security and QoS in wireless ad-hoc networks.