An analysis framework for the performance of collocated heterogeneous wireless networks with negative acknowledgements


  • Bilal Khan Dongguk university south Korea
  • Jong-Suk Ahn
  • Eun-Chan Park


Binary exponential backoff, coexistence, heterogeneous, IEEE802.11, interference.


This paper proposes an analytical framework for evaluating the performance of coexistent heterogeneous wireless networks configured with different transmission powers and carrier sense thresholds. Two models, M-INF and M-MAC, are developed based on two-dimensional Markov chain. M-INF evaluates the effect of asymmetric channel access
and interference among heterogeneous wireless networks, whereas M-MAC evaluates the effectiveness of a negative acknowledgement (NACK) mechanism. Results obtained from simulations are compared with those obtained from our proposed M-INF as well as conventional models, e.g., CHAM and HSM. It was found that simulations match our proposed
models more closely than the conventional models. In addition, results obtained from M-MAC suggest that using NACK improves network performance by 40%.


Author Biography

Bilal Khan, Dongguk university south Korea

PhD Scholar,Department of Computer Science and Engineering.


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