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Dynamic Spectrum Sharing in Wireless Mesh Networks for Throughput Enhancement

Darchini Maragheh, Kamaloddin | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41065 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Ashtiani, Farid
  7. Abstract:
  8. Having special advantages over existing networks, mesh networks have attracted much attention. Proposing new MAC protocols which are in compliance with these networks is an interesting field in which many works have been done. Also, Task Group S of the IEEE802.11 is going to release a standard for the mesh networks. Analysis of a simplified version of IEEE802.11s is the first goal of this thesis. The standard is a spectrum sharing algorithm based on scheduling and contention. Although IEEE802.11e manages the contention for accessing the wireless medium in the standard, but for the sake of simplicity, in this thesis we used SlottedALOHA instead. Also, one gateway and six other nodes are considered in our scenario, all of which can send and receive data. First, considering the scenario, we introduce an analytical model in which we have several queues for modeling the performance of each node. In order to model the sequential time events in the standard, we employ the multi-class feature in the proposed queuing network model. Then, writing the traffic equations for the network and using the stability criteria, we find the maximum stable throughput. The validity of the proposed model is approved by comparing the analytical and simulation results. Then, evaluating the effect of the location of each scheduled time interval on the network performance, we propose a new algorithm based on prioritized random access scheduling and observe the enhancement of the maximum stable throughput
  9. Keywords:
  10. Wireless Mesh Network ; Queueing Network ; Maximum Stable Throughput ; Institute Electrical and Electronic Engineers (IEEE)802.11S Standard

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