IEEE 802.11 Load Balancing: An Approach for QoS Enhancement

Jabri, Issam; Krommenacker, Nicolas; Divoux, Thierry; Soudani, Adel

doi:10.1007/s10776-008-0072-y

Cited by 27 publications

(13 citation statements)

References 19 publications

(25 reference statements)

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“…In general, the existing various load-balancing solutions can be categorized into adjustment methods and balancing metrics. The adjustment methods include cell breathing [7,14,15], AC [13,19], and AM [10][11][12]20] schemes. In [10], the authors introduced the following three weights for evaluating the load balancing of APs: (i) each AP serves the approximate number of MDs; (ii) the AP-served traffic; and (iii) bandwidth usage, in which the traffic load is divided by the AP bandwidth (e.g., the bandwidth is 20 units/s, two MDs, the total amount of flows is four units, and the bandwidth usage is 20%).…”

Section: Relevant Studiesmentioning

confidence: 99%

“…Consequently, the overhead for connection and disconnection is high. Jabri et al [11] used an FI [17] and an AM method to enhance the load balance over the overlapped areas among the APs. One of the advantages is that the proposed method can adjust the traffic from heavy-to light-load APs, and the process range is limited within the overlapped areas, which prevents global load balance.…”

Section: Relevant Studiesmentioning

confidence: 99%

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Load-balancing metrics: Comparison for infrastructure-based wireless networks

Wen

Shen²

2014

Computers & Electrical Engineering

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Section: Relevant Studiesmentioning

confidence: 99%

Section: Relevant Studiesmentioning

confidence: 99%

Load-balancing metrics: Comparison for infrastructure-based wireless networks

Wen

Shen²

2014

Computers & Electrical Engineering

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“…The AP selected is the one for which the Jain Fairness Index is the highest [15]. In the fourth group, v x is mapped to an expression for AP load (x = a, b, c), and the AP which is least loaded is selected.…”

Section: Related Workmentioning

confidence: 99%

An Estimated Delay Based Association Policy for Web Browsing in a Multirate WLAN

Pradeepa¹,

Kuri

2012

IEEE Trans. Netw. Serv. Manage.

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Station-Access Point (STA-AP) association is an important function in IEEE 802.11 Wireless LAN (WLAN) management. We obtain an association policy that can be implemented in centralized WLAN management devices, or in STAs, by taking into account explicitly two aspects of practical importance: (a) TCP-controlled short file downloads interspersed with read times (motivated by web browsing), and (b) different STAs associated with an Access Point (AP) at possibly different rates (depending on distance from the AP).Our approach is based on two steps. First, we consider an analytical model to obtain the aggregate AP throughput for long TCP-controlled file downloads when STAs are associated at k different rates r1, r2, . . ., r k ; this extends earlier work in the literature. Second, we present a 2-node closed queueing network model to approximate the expected average-sized file download time for a user who shares the AP with other users associated at a multiplicity of rates. These analytical results motivate the proposed association policy, called the Estimated Delay based Association (EDA) policy: Associate with the AP at which the expected file download time is the least.Simulations indicate that for a web-browsing type traffic scenario, EDA performs substantially better than other policies that have been proposed earlier. Crucially, the improved performance is sustained even in realistic evaluation scenarios, where the assumptions underpinning the analytical model do not hold. To the best of our knowledge, this is the first work that proposes an association policy tailored specifically for web browsing. Apart from this, our analytical results could be of independent interest.

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“…The impact of the SNR level of the wireless channel link to the efficiency of the LBA application should be clarified in order to correlate the involving of the SNR with the traffic load consideration in a new structure of the Load Balancing Algorithm (LBA).This paper contributes in this objective at three levels.. It aims first of all to make a proof with an experimental study on the efficiency of the LBA algorithm to improve the quality of service not only in the network level, as being studied in [2], but also at the quality of service at application's processes. At a second level, this paper explores the application's limits of the LBA algorithm to enhance the quality of service in a communication process in regard to SNR of the wireless channel between the mobile station and the AP.. For this purpose, this paper presents a set of experimentation concerning the analysis of the LBA effect on the quality of service with the consideration of the associated SNR connection between the mobile and the access point AP.…”

mentioning

confidence: 99%

“…Some access points will be over loaded, others are under loaded. When an access point is overloaded, applications requirements are not fulfilled and the end users will not be satisfied about the ensured quality of service (QoS) [2,4]. To better manage quality of service in these networks, different mechanisms have been proposed to enhance the communication processes.…”

mentioning

confidence: 99%

Data traffic load balancing and QoS in IEEE 802.11 network: Experimental study of the signal strength effect

Soudani

Divoux

Tourki

2012

Computers & Electrical Engineering

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Recently there is a growing interest in the internet and multimedia wireless networking where the bandwidth and the Quality of Service ( QoS) should be managed with careful. The performances of applications built on these systems depend on bandwidth availability that arises as the most limit of this solution. In fact, the IEEE 802.11 standards do not provide performed mechanism of loading distribution among different APs of the network. Then, an AP can be heavily overloaded leading to station throughput degradation.For this problem, load balancing algorithms (LBA) was been considered as one of the attractive solution to share the traffic through the available access points (APs) bandwidths. However, applying the load balancing algorithm (LBA) and shifting a mobile connection from an access point to another without considering the signal to noise ratio (SNR) of the concerned APs might causes worst communication performances. This paper is then a contribution to check the performance's limits of the LBA algorithm through an experimental study of communication metrics for MPEG-4 video transmission over IEEE 802.11 network. The paper focuses, then, on the proposition of a new structure of the LBA algorithm with the introduction of the SNR level. Introduction.Nowadays, Hotspots environment based on IEEE 802.11 networks are widely used due to their low-cost hardware infrastructure. The growing interest in the internet and in multimedia wireless networking in these hotspot environments has revealed the necessity to focus more on the quality of service management [1,5]. In the work presented in [2], we have studied the different mechanisms of quality of service, being adopted in the IEEE 802.11 based networking systems. We have defended in this paper a general approach based on a centralized architecture intended to share mobiles on available APs that belong to the hotspot environment. The proposed approach is based on the use of the Load Balancing Algorithm (LBA) [2, 3, and 4]. The basic idea of the LBA algorithm is to ensure a fair (balanced) distribution of the traffic. For that purpose, if a new mobile access to the network or when a mobile change the BSS or when the application level change the requirements the LBA algorithm will be processed to find the best new distribution based only on traffic load criterion for fair bandwidth use. The load balancing algorithm (LBA) will evaluate the traffic load of each access point in the network to decide whether it is considered as under-loaded or overloaded. According to the LBA server decision, a new distribution of mobiles will be applied. Then, some mobile's connections will be shifted from AP to others, regardless the quality of their channel links, in the aim to share the general bandwidth of the network, We presented in [2] an efficient centralized architecture for the application of this approach. We designed the a protocol structure to manage data transaction between the LBA server, APs, and mobiles. A set of required new requests for quality of service handling in ...

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IEEE 802.11 Load Balancing: An Approach for QoS Enhancement

Cited by 27 publications

References 19 publications

Load-balancing metrics: Comparison for infrastructure-based wireless networks

Load-balancing metrics: Comparison for infrastructure-based wireless networks

An Estimated Delay Based Association Policy for Web Browsing in a Multirate WLAN

Data traffic load balancing and QoS in IEEE 802.11 network: Experimental study of the signal strength effect

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