On Access Point Selection in IEEE 802.11 Wireless Local Area Networks

Abusubaih, Murad; Gross, James; Wiethoelter, Sven; Wolisz, Adam

doi:10.1109/lcn.2006.322194

Cited by 43 publications

(32 citation statements)

References 3 publications

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“…If an AP receives a probe request, it will acknowledge the request by sending back a probe response, which indicates that the AP is in vicinity. In [8], the author considers that STA will select a BSS that enables it to provide the best service for its service to insert, so STA will probably select an AP whose link attenuation is the smallest, i. e. SNR is the largest, rates, it uses the method of formula calculation and has a high complexity, however a low accuracy.…”

Section: Related Workmentioning

confidence: 99%

An AP Selection Scheme for Enhancement of Multimedia Streaming in Wireless Network Environments

Ryu¹,

Wang²,

Kang³

2010

Journal of the Korea Academia-Industrial cooperation Society

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Recently, there has been a growing interest in the use of WLAN technology due to its easy deployment, flexibility and so on. Examples of WLAN applications range from standard internet services such as Web access to real-time services with strict latency/throughput requirements such as multimedia video and voice over IP on wireless network environments. Fair and efficient distribution of the traffic loads among APs(Access Points) has become an important issue for improved utilization of WLAN. This paper focuses on an AP selection scheme for achieving better load balance, and hence increasing network resource utilization for each user on wireless network environments. This scheme makes use of active scan patterns and the network delay as main parameters of load measurement and AP selection. This scheme attempts to estimate the AP traffic loads by observing the up/down delay and utilize the results to maximize the link resource efficiency through load balancing. We compared the proposed scheme with the original SNR(Signal to Noise Ratio)-based scheme using the NS-2(Network Simulation-2). We found that the proposed scheme improves the throughput by 12.5% and lower the network up/down link delay by 36.84% and 60.42%, respectively. All in all, the new scheme can significantly increase overall network throughput and reduce up/down delay while providing excellent quality for voice and video services.

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Section: Related Workmentioning

confidence: 99%

An AP Selection Scheme for Enhancement of Multimedia Streaming in Wireless Network Environments

Ryu¹,

Wang²,

Kang³

2010

Journal of the Korea Academia-Industrial cooperation Society

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“…The mobile device moves toward irregular directions. We choose n pre-register APs to prevent too many pre-authentication messages [8] [9] [10]. There are three steps to select n APs:…”

Section: Backronund and Reelated Workmentioning

confidence: 99%

A Pre-registered Handoff Scheme in IEEE 802.11r Wireless Local Area Networks

Chou

Liao

et al. 2010

2010 International Conference on Communications and Mobile Computing

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nowadays, with the wide establishment of IEEE 802.11, more and more people use Wi-Fi to surf on the Internet. Due to the convenience and mobility of the mobile devices, a number of mobile users have been increasing greatly. For realtime video and VOIP have attracted much attention, the delay time of handoff is the most important issue for the service. In order to provide high-speed service with low delay, IEEE 802 family defines the standard IEEE 802.11r to reduce the delay time of services. Due to IEEE 802.11r will expect that all AP has exchanged secure keys, which will reduce handoff delay time but will cause the authenticated information increment, a method is proposed. This paper executes pre-register with several specific AP to reduce exchanged secure keys. First, APs are divided into four regions according to RSSI. Second, the faster the mobile device moves, the less probable it is to change the direction suddenly and the region in front of the mobile device is more concentrative. Finally, after predicting the user number that all APs serve, the AP that serves the fewest people is selected. With the above three suggestions in this algorithm, IEEE 802.11r not only executes fast handoff, but also avoids too many authenticated messages.

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“…1, in ubiquitous WLANs, since an MN must be able to freely connect with all APs for an inter-domain handover, it is desirable that an AP is not modified in order to maintain compatibility with existing APs. Almost all existing AP selection methods [7]- [9], however, necessitate some modifications of APs, e.g., additional information is needed in the beacon frame transmitted from the AP. Moreover, the modification needs to be implemented in both an AP and an MN.…”

Section: Related Workmentioning

confidence: 99%

Proactive AP Selection Method Considering the Radio Interference Environment

Taenaka

Kashihara

Tsukamoto

et al. 2009

IEICE Trans. Inf. & Syst.

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SUMMARYIn the near future, wireless local area networks (WLANs) will overlap to provide continuous coverage over a wide area. In such ubiquitous WLANs, a mobile node (MN) moving freely between multiple access points (APs) requires not only permanent access to the Internet but also continuous communication quality during handover. In order to satisfy these requirements, an MN needs to (1) select an AP with better performance and (2) execute a handover seamlessly. To satisfy requirement (2), we proposed a seamless handover method in a previous study. Moreover, in order to achieve (1), the Received Signal Strength Indicator (RSSI) is usually employed to measure wireless link quality in a WLAN system. However, in a real environment, especially if APs are densely situated, it is difficult to always select an AP with better performance based on only the RSSI. This is because the RSSI alone cannot detect the degradation of communication quality due to radio interference. Moreover, it is important that AP selection is completed only on an MN, because we can assume that, in ubiquitous WLANs, various organizations or operators will manage APs. Hence, we cannot modify the APs for AP selection. To overcome these difficulties, in the present paper, we propose and implement a proactive AP selection method considering wireless link condition based on the number of frame retransmissions in addition to the RSSI. In the evaluation, we show that the proposed AP selection method can appropriately select an AP with good wireless link quality, i.e., high RSSI and low radio interference.

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On Access Point Selection in IEEE 802.11 Wireless Local Area Networks

Cited by 43 publications

References 3 publications

An AP Selection Scheme for Enhancement of Multimedia Streaming in Wireless Network Environments

An AP Selection Scheme for Enhancement of Multimedia Streaming in Wireless Network Environments

A Pre-registered Handoff Scheme in IEEE 802.11r Wireless Local Area Networks

Proactive AP Selection Method Considering the Radio Interference Environment

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