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Presented at :
Wireless Mesh Networks rose as a key technology to provide flexible, high capacity backhaul over large geographic areas at low cost. Numerous advantages conceived by this technology are inspiring deployments all over the world, for the purpose of providing different types of services like broadband home networking, telecommunication and health monitoring in rural areas. Advantages of the technology like low cost, self organization, robustness are really unpreceded. The 802.11-based mesh networks are rapidly gaining popularity for deployments in rural areas.
The report points out various issues to be addressed in order exploit the technology to its full potential. The report reflects in-depth study of link layer and routing issues in these types of the network. The study is accompanied by analysis of some real world deployment like Roofnet. The theoretical analysis of the network capacity, and optimization over cost while planning and deployment of such network is also addressed.
With the use of multiple radios and directional antennas, the traditional CSMA/CA could not use capacity of the mesh to its optimum. The survey rst concentrates on measurements characterizing the links in the mesh and then describe some TDMA protocols suited for the long distance mesh communication.The validation link abstraction in the mesh networks has serious implications on MAC and routing protocols. In order to estimate the link quality exactly, some of the routing protocols combines multiple performance metrics into one. The modification of 802.11MAC to multiple radios and modifying routing to take channel diversity into account, are the other interesting topics reflected in the survey. The overall objective is to spark new research interests.