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Distributed Channel Assignment with Dynamic Bandwidth Based on Traffic Demand in Wireless LAN

Akhoundi, Arash | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51415 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Pakravan, Mohammad Reza
  7. Abstract:
  8. There has been a rapidly growing interest in deployment of Wireless LAN Networks (WLANs) in the past decade. The cost of WLAN devices has steadily decreased while their performance has increased. As a result, a wide range of new connectivity services are using WLAN standards for data exchange between nodes and networks through WLAN access points. Deployment of many WLAN access points in enterprise applications causes severe degradation of performance due to interference between access point channels. Therefore, it is wise to control the access point channel assignment procedure to reduce interference and improve network performance. This process can be done in using centralized or distributed algorithms. In this paper, we propose a novel distributed channel assignment algorithm which adapts the channel and its bandwidth based on user traffic. The proposed algorithm is simple to implement and reduces the overall cost of network. Also, it can be deployed in a mixed environment where some nodes are legacy nodes with no support of the proposed algorithm and others support it. We propose a smart hopping algorithm that senses channels and uses the collected information to choose the best channel which has low interference and dynamically adjusts the channel bandwidth based on user traffic demand. We have simulated the proposed algorithm and the results show that the network throughput can be increased by a factor of two to three depending on the user demand and channel condition
  9. Keywords:
  10. Channel Allocation ; Enterprise Wireless Local Area Networks (WLANs) ; Network Inference ; Distributed Channel Allocation ; Dynamic Bandwidth Assignment

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