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A Survey on the Performance of Network Coding Techniques in Multi-Hop Wirless MESH Networks

Author: ManarSabahAl-Kali(MaNaEr)
Tutor: YuLi
School: Huazhong University of Science and Technology
Course: Communication and Information System
Keywords: Network coding Wireless Mesh Networks Coding aware routing
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 12
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Abstract


In recent years , Wireless Mesh Networks (WMNs) advantage by virtue of its low-cost access to the Internet and efficient scalability and network areas of concern . Wireless Mesh network due to limited throughput , low reliability , and is difficult to meet the needs of applications such as high - definition video , file sharing, and online games . Since the self-generated network coding is used to solve the problem of the throughput in the WMNs , it has been applied to a variety of network mechanisms to achieve the purpose of improving throughput . Whether these mechanisms is calculated based on the mathematical theory or practical test bed , they have made use of the radio characteristics mixed data from multiple sources , thus saving bandwidth . With the development in recent years , these optimization method based on the throughput of the wireless network coding can be divided into two categories: the first category rely on traditional routing protocol to determine the path from the source node to the destination node , the path to look for possible coding to be encoded , this approach is referred to as a non-coding aware routing ; while the other for encoding aware routing , it is a means to determine the routing according to the path between the source node and the destination node coding opportunities . Research and compare the two representative network coding protocol comparative analysis of these two types of methods . Aware routing protocol in which a non-coding COPE, the agreement between the IP and MAC layers joined coding layer , when the node discovery coding opportunities will encode the data operation . Another protocol uses encoding aware routing methods , it is specified for the received data packet with two header respectively to mark the encoded packet and the original package , in order to actively looking for coding opportunities , and is determined on this basis from the source node route to the destination node , the protocol is referred to as the the BEND agreement . Agreements in a number of different topologies of WMNs of COPE and BEND agreement performance analysis, comparison with multiple unicast multi-hop WMNs performance , including data encoding capability , efficiency of resource sharing , and congestion control . Experiments show BEND agreement making the first hop can achieve the desired performance . But with the number of relay nodes more than two hops , COPE performance relative to the BEND , has better stability .

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