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Throughput Analysis of IEEE 802.11 WLANs with Inter-Network Interference

Graduate School of Science and Engineering, Chiba University, Chiba 263-8522, Japan
School of Physics and Optoelectronic Engineering, Xiangtan University, Xiangtan 411105, China
Department of Software and Computer Engineering, Ajou University, Suwon 16499, Korea
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(6), 2192;
Received: 24 January 2020 / Revised: 19 March 2020 / Accepted: 20 March 2020 / Published: 24 March 2020
(This article belongs to the Section Electrical, Electronics and Communications Engineering)
Recently, we often see the environment where many one-to-one Wireless Local Area Networks (WLANs) exist in a small area. In this environment, the network throughput of certain WLAN reduces significantly because of the interference from other networks (i.e., inter-network interference). The inter-network interference is the effect of carrier-sensing activities when there are ongoing transmissions in neighbor networks. This paper presents analytical expressions using airtime concept, which newly take into account the inter-network interference, for network throughputs of WLANs. There are existing works that similarly address the WLAN’s carrier-sensing duration. However, they either consider a simple interference model or assume the simultaneous transmission time is negligible. Different from them, we consider the significant impact of simultaneous transmission. As a result, our analytical model can precisely express each network carrier-sensing duration by subtracting the simultaneous transmission time. More specifically, we have successfully obtained each network throughput by expressing frame-existence probabilities concerning each network’s End Device (ED). We also confirm the validity of the analysis by comparison with simulation. The analytical results and the simulation results agree well. View Full-Text
Keywords: WLAN; interference; carrier-sensing; IEEE 802.11; throughput analysis WLAN; interference; carrier-sensing; IEEE 802.11; throughput analysis
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Liu, J.; Aoki, T.; Li, Z.; Pei, T.; Choi, Y.-J.; Nguyen, K.; Sekiya, H. Throughput Analysis of IEEE 802.11 WLANs with Inter-Network Interference. Appl. Sci. 2020, 10, 2192.

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