Dynamic Carrier-Sense Threshold Selection for Improving Spatial Reuse in Dense Wireless LANs

So, Jungmin; Lee, Joosang

doi:10.3390/app9193951

Cited by 5 publications

(7 citation statements)

References 19 publications

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“…Once one of the nodes transmits a packet, it triggers other nodes in the group to transmit their packets together. So et al [5] proposed a method where two CSTs are used instead of one. When a node transmits a packet, it includes an "advertised CST" in the preamble, which should be obeyed by the neighbors to protect the ongoing transmission.…”

Section: Related Workmentioning

confidence: 99%

“…In the simulations, CST min is −82 dBm and CST max is −62 dBm. The third method is "Dual-CST", which is a method proposed in [5] and uses "advertised CST" in addition to the original CST. The fourth method is "PSR", where an AP advertises acceptable interference in the preamble, and a node in a different BSS may choose to transmit if its interference will not exceed the acceptable interference level at the AP.…”

Section: Performance Evaluation 41 Simulation Setupmentioning

confidence: 99%

“…We conduct extensive simulations to evaluate performance of the proposed method under various environments and parameters, comparing with other existing methods such as OBSS/PD, PSR and Dual-CST [5].…”

mentioning

confidence: 99%

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

Kim

2021

Applied Sciences

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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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Section: Related Workmentioning

confidence: 99%

Section: Performance Evaluation 41 Simulation Setupmentioning

confidence: 99%

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

Kim

2021

Applied Sciences

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“…The simulator is our in-house implementation, in which the wireless networks operate following the IEEE 802.11 standard. Note that our simulator has been efficiently applied in several previous works [11][12][13][14][15][16][17]. Moreover, we have published the simulator's source codes on the website in [23].…”

Section: Performance Evaluationmentioning

confidence: 99%

Throughput Analysis of IEEE 802.11 WLANs with Inter-Network Interference

Liu

Aoki

et al. 2020

Applied Sciences

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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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“…In recent years, emphasis has been placed on spreading wireless communications on the largest scale in various indoor environments [1]. Nevertheless, the increase in wireless communication devices, which are characterized by low cost and higher data rate services, has resulted in the provision of large quantities of operations for deploying wireless local area networks (WLANs) across a wide variety of domains [2]. Wireless Fidelity (Wi-Fi) is known as one of the best most important and widely used technologies and techniques, which has been applied in a wide variety of types for indoor environmental areas [3].…”

Section: Introductionmentioning

confidence: 99%

Implementation Mixed Wireless Network with Lower Number of Wi-Fi Routers for Optimal Coverage

et al. 2021

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With the development of various wireless communication networks, Wi-Fi Router positioning and deployment systems have become widely popular in recent years to improve coverage in various environments. In this paper, we present an appropriate mechanism for defining the deployment of Wi-Fi Routers to improve coverage in the Oxford Languages Institute (OLI) environment. In addition, the institute's environment was simulated using the Wireless InSite (WI) Package. In this work, two types of Wi-Fi Routers are used. The first is the TP-Link, while the second is the Rocket. These two devices operate at 2.4 and 5 GHz frequencies. There are two objectives in this work. The first aim is to determine the best location to cover the simulated scene environment in a better way. The second aim is to compare Wi-Fi Routers to find out which Wi-Fi Router is better and find out how many Wi-Fi Routers we need to cover the institute's environment. The comparison between Wi-Fi Routers was based on basic parameters to measure the performance of wireless networks, the most important of which are Coverage Rate (CR) Percentage, Signal Quality Rate (SQR), and Received Power Rate (RPR). According to the results that were shown on the Graphical User Interface (GUI) using MATLAB Software. We noticed that the CR, SQR, and RPR of the Rocket are 83.9080%, 97.0082%, and -35.2337 dBm respectively, and these results are better than the results provided by the TP-Link, as it gave the CR, SQR, and RPR are 32.1839%, 77.8690%, and -58.1685 dBm, respectively. Finally, we conclude that CR using the Rocket is good and we need one device to cover the institute’s environment. While CR using the TP-Link is bad and we need five devices to reach the coverage provided by the Rocket because the Rocket has high transmitted power and gain capacity.

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Dynamic Carrier-Sense Threshold Selection for Improving Spatial Reuse in Dense Wireless LANs

Cited by 5 publications

References 19 publications

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

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

Throughput Analysis of IEEE 802.11 WLANs with Inter-Network Interference

Implementation Mixed Wireless Network with Lower Number of Wi-Fi Routers for Optimal Coverage

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