A performance study of roaming in wireless local area networks based on IEEE 802.11r

recently, with the more extensive deployment of Wireless Local Area Networks (WLAN), and the growing population of mobile users, the unstable handover problem in wireless network services receives more and more attention. Since users expect the continuity of services while roaming, IEEE 802 family defines the standard IEEE 802.11r (Fast BSS Transition) to reduce the interrupted time of services to the minimum. Supposing users use IEEE 802.11r to execute the pre-authentication process with all Access Points, there will be too many authenticated messages. Therefore, an IEEE 802.11r-based algorithm is proposed to avoid the pre-authentication process with all APs. In order to reduce the pre-register APs, we first of all divide the coverage of the APs into four regions according to the RSSI. Second, to figure out more accurate APs, we dynamically adjust the region. Third, if the mobile device cannot find the AP of each region, we further modify the region. Finally, we pick up an AP to execute the preauthentication each region. With the four above-mentioned considerations proposed in this algorithm, we are able to make use of roaming more effectively.

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“…θi =θi+γﾟ, θ1+θ2=180 ﾟ, θ1=θ3, θ2=θ4 (5) In this paper, we assume that theγis 10 ﾟ, it expands angle of the region 10 ﾟ each time.…”

Section: Svc (Scalable Video Coding)mentioning

confidence: 99%

Pre-Register Algorithm for SVC by Fast BSS Transition Wireless Networks

Yang

Chou

et al. 2009

2009 Fifth International Conference on Intelligent Information Hiding and Multimedia Signal Processing

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“…The first full implementation of 802.11r [17], which is now part of the 802.11-2016 standard [18], was done at the Queen’s University, Canada [19] in 2008. The goal was to deploy a WLAN infrastructure supporting distributed multiple APs access and fast handover according to the 802.11r specifications.…”

Section: Related Workmentioning

confidence: 99%

High Performance SDN WLAN Architecture

Košťál

Bencel

Ries

et al. 2019

Sensors

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Wireless Local Area Network (WLAN) infrastructure is a dominant technology for direct access to the Internet and for cellular mobile data traffic offloading to WLANs. Additionally, the enterprise infrastructure can be used to provide functionality for the Internet of Things and Machine to Machine scenarios. This work is focused on improvements of radio resources control scalability similar to mobile networks via handover between cells. We introduce an improved IEEE 802.11 architecture utilizing Software-Defined Networks (SDNs). The proposed architecture allows communications during device movements without losing a quality of service (QoS). The fast seamless handover with QoS enables efficient usage of radio resources in large networks. Our improvements consist of integrating wireless management to OpenFlow protocol, separating encryption and decryption from an access point. In parallel, this feature as a side effect unloads processing at the Access Points (APs). Finally, the functionality of architecture design and scalability was proven by Colored Petri Nets (CPNs). The second proof of our concept was performed on two scenarios. The first scenario was applied to a delay sensitive use case. The second scenario considers a network congestion in real world conditions. Client’s mobility was integrated into both scenarios. The design was developed to demonstrate SDN WLAN architecture efficiency.

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“…This status is because of the latest standardized protocol for seamless handover -802.11r [10]. This protocol brought handover in 50 ms [8], but also left vendors to implement this solution on their own. The problem is that small vendors are not able to agree on implementation specifications and only big corporations are taking advantage of this proposal [9][11] [12].…”

Section: Introductionmentioning

confidence: 99%

Seamless handover in 802.11 networks

Balazia

Kotuliak

2012

2012 5th Joint IFIP Wireless and Mobile Networking Conference (WMNC)

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This paper defines new architecture for fast handover in WiFi networks based on the idea of Personal AP and centralized management. New enterprise solutions achieve their limits for real-time multimedia communication, but they are in general expensive and not widely deployed. The majority of them is based on the 802.11r standard, which targets a 50 ms handover. The proposed architecture targets a 10 ms handover and it can be deployed on a majority of todays APs and does not require any change on the client side.

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A performance study of roaming in wireless local area networks based on IEEE 802.11r

Cited by 18 publications

References 1 publication

Pre-Register Algorithm for SVC by Fast BSS Transition Wireless Networks

Pre-Register Algorithm for SVC by Fast BSS Transition Wireless Networks

High Performance SDN WLAN Architecture

Seamless handover in 802.11 networks

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