Improved access point selection

Nicholson, Anthony J.; Chawathe, Yatin; Chen, Mike Y.; Noble, Brian; Wetherall, David

doi:10.1145/1134680.1134705

Cited by 177 publications

(110 citation statements)

References 21 publications

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“…(1) Reduce connection setup time with APs, especially with community networks like FON that have a lengthy authentication process. (2) Clients could take advantage of Wi-Fi maps and real time location updates in order to choose which APs will provide the most benefit to the in-motion user [13]. Finally, WiFi is bottlenecked by the ISP link and (3) caching data on the AP (both for upload and download) would eliminate the Internet back-haul link bottleneck.…”

Section: Resultsmentioning

confidence: 99%

An Experimental Performance Comparison of 3G and Wi-Fi

Gass

Diot²

2010

Lecture Notes in Computer Science

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Abstract. Mobile Internet users have two options for connectivity: pay premium fees to utilize 3G or wander around looking for open Wi-Fi access points. We perform an experimental evaluation of the amount of data that can be pushed to and pulled from the Internet on 3G and open Wi-Fi access points while on the move. This side-by-side comparison is carried out at both driving and walking speeds in an urban area using standard devices. We show that significant amounts of data can be transferred opportunistically without the need of always being connected to the network. We also show that Wi-Fi mostly suffers from not being able to exploit short contacts with access points but performs comparably well against 3G when downloading and even significantly better while uploading data.

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Section: Resultsmentioning

confidence: 99%

An Experimental Performance Comparison of 3G and Wi-Fi

Gass

Diot²

2010

Lecture Notes in Computer Science

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“…In order to examine the relative performance of eT P t and rxpwr as a function of node density, we plot the percentage of their achieved throughput as compared to 1 Nonetheless, we speculate the optimal throughput for the joining STA to eventually reach diminishing return when the number of APs exceeds a certain threshold. This is because as the number of APs increases in a fixed area, the average distance between APs decreases, and the spatial frequency reuse of this WLAN decreases, which means more APs have to contend for the same amount of TXOPs.…”

Section: Increasing Node Densitymentioning

confidence: 99%

“…To address these issues, a variety of schemes have been proposed in the literature [1]- [18], many of which try to optimize potential throughput and bandwidth. Nicholson et al propose that STAs quickly associate with each AP and run a battery of tests to estimate the quality of each AP's connection [1].…”

Section: Introductionmentioning

confidence: 99%

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Access Point Selection for Multi-Rate IEEE 802.11 Wireless LANs

Yang

Krishnan

Zakhor

2015

2015 IEEE Global Communications Conference (GLOBECOM)

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Access Point (AP) selection is an important problem in WLANs as it affects the throughput of the joining station (STA). Existing approaches to AP selection predominantly use received signal power and as such, do not take into account interference and collisions at each STA, and transmit opportunities (TXOPs) at APs. In this paper, we propose a class of AP selection algorithms based on the joining STA's expected throughput by taking into account the above factors. Specifically, we collect a binary-valued local channel occupancy signal, called busy-idle (BI) signal, at each node and require the APs to periodically broadcast their BI signal together with a quantity that represents TXOPs at the APs. This enables the joining STA to estimate expected throughput for each candidate AP before it selects one. To capture TXOPs at each AP, we propose a few different quantities, including the number of associated STAs, sum of inverse of MAC rates, and the average waiting and idle times. We use NS-2 simulations to demonstrate the effectiveness of our algorithms. For a random topology consisting of 24 APs and 60 STAs, our algorithms can increase average throughput of the joining STA by as much as 52% as compared to the traditional signal power based AP selection approach (rxpwr). In this case, the achieved average throughput is 97% of that obtained via the optimal selection. We also show that, in contrast to rxpwr, the throughput of our proposed algorithms remain close to optimal with the increase in AP density or STA density.

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“…H. Han 등의 연구도 앞의 두 연구와 마찬가지로 위장 AP를 탐지하는 주요 요소로 RTT 값을 이용한다 [4,5] .더 쾌적한 인터넷을 제공하는 AP를 시스템적으로 선택하는 방법에 대한 연구도 있었지만, 이는 위장 AP를 탐지하는 기법은 아니다 [6] . [7] .…”

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A Method of Authenticating WLAN APs for Smartphones

신동오¹,

강전일²,

양대헌³

et al. 2014

The Journal of Korea Information and Communications Society

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The increase of smartphone users have made mobile carriers offload increasingly congested traffic of 3/4G by providing Wi-Fi hot-spots in the public places such as coffee shops and subway stations. In the traditional authentication in WLAN, the users should convince the service providers that they are valid customers before they use WLAN services. Since the authentication protocol is designed for service providers. Even with the mutual authentication based on the IEEE 802.1X, which is supported by IEEE 802.11 standard, it is difficult to be convinced of that the service providers really have installed the WLAN APs, which users are confronted with.An attacker can install rogue APs that masquerade as legitimate APs by copying the SSID, MAC address, etc. in order to obtain users' private information. In this paper, we introduce a method of authenticating legitimate APs for smartphone users. And we show our proposal can be well utilized for the current Wi-Fi hot-spots as a security plug-in and prove it through our experiments.

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Improved access point selection

Cited by 177 publications

References 21 publications

An Experimental Performance Comparison of 3G and Wi-Fi

An Experimental Performance Comparison of 3G and Wi-Fi

Access Point Selection for Multi-Rate IEEE 802.11 Wireless LANs

A Method of Authenticating WLAN APs for Smartphones

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