Örgüsel ağlarda OLSR-duyarlı katmanlar arası kanal erişim planlaması

A wireless mesh network (WMN) is a communications network in which the nodes are organized to form a mesh topology. WMNs are expected to resolve the limitations and signifıcantly improve the performance of wireless ad-hoc, local area, personal area, and metropolitan area networks, which is the reason thatthey are experiencing fast-breaking progress and deployments. WMNs typically employ spatial TDMA (STDMA) based channel access schemes which are suitable for the high traffıc demands of WMNs. Currentresearch trends focus on using loosening the strict layered network implementation in order to look for possible ways of performance improvements. In this thesis, we propose two STDMA-based cross-layer OLSR-Aware channel access scheduling schemes (one distributed, one centralized) that aim better utilizingthe network capacity and increasing the overall application throughput by using OLSR-specifıc routing layer information in link layer scheduling. The proposed centralized algorithm provides a modifıcation of the traditional vertex coloring algorithm while the distributed algorithm is a fully distributed pseudo-randomalgorithm in which each node makes decisions using local information. Proposed schemes are compared against one another and against their Non-OLSR-Aware versions via extensive ns-2 simulations. Our simulation results indicate that MAC layer can obtain OLSR-specifıc information with no extra control overhead and utilizing OLSR-specifıc information signifıcantly improves the overall network performance both in distributed and centralized schemes. We further show that link layer algorithms that target the maximization of concurrent slot allocations do not necessarily increase the application throughput.