TCP Performance Analysis over Aggressive Physical Carrier Sensing Based Wireless Local Area Networks

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.

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Performance analysis of real-time traffic over 802.11n Wireless Local Area Networks: An experimental study

2014 International Wireless Communications and Mobile Computing Conference (IWCMC) ◽

10.1109/iwcmc.2014.6906399 ◽

2014 ◽

Cited By ~ 3

Author(s):

John Podolanko ◽

Sajib Datta ◽

Sajal K. Das

Keyword(s):

Experimental Study ◽

Performance Analysis ◽

Real Time ◽

Local Area Networks ◽

Local Area ◽

Wireless Local Area Networks ◽

Real Time Traffic

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Improving Spatial Reuse of Wireless LAN Uplink Using BSS Color and Proximity Information

Applied Sciences ◽

10.3390/app112211074 ◽

2021 ◽

Vol 11 (22) ◽

pp. 11074

Author(s):

Hyerin Kim ◽

Jungmin So

Keyword(s):

Wireless Lan ◽

Multiple Access ◽

Local Area Networks ◽

Local Area ◽

Wireless Local Area Networks ◽

Spatial Reuse ◽

Carrier Sense Multiple Access ◽

Medium Access ◽

Network Systems ◽

Carrier Sensing

With the density of wireless networks increasing rapidly, one of the major goals in next-generation wireless LANs (Local Area Networks) is to support a very dense network with a large number of closely deployed APs (Access Points) and crowded users. However, the CSMA (Carrier-Sense Multiple Access)-based medium access control of current wireless network systems suffers from significantly degraded performance when the network becomes dense. Recent WLAN (Wireless Local Area Networks) standards include measures for increasing spatial reuse such as BSS (Basic Service Set) coloring, but the schemes based on BSS coloring such as OBSS/PD (Overlapping BSS/Preamble Detection) have limitations in improving spatial reuse. In this paper, we propose a spatial reuse method for uplink which can utilize BSS color and proximity information to improve the efficiency of carrier sensing and thus spatial reuse. Specifically, through the BSS color and the proximity information, a node receiving a preamble can figure out how far the receiver of the ongoing traffic is located. This information is used to determine whether the node should aggressively start transmitting or defer its transmission to protect the ongoing transmission. Simulation results show that the proposed method outperforms existing methods in terms of throughput and fairness.

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