Optimal load distribution in large scale WLAN networks utilizing a power management algorithm

Haidar, Mohamad; Akl, Robert; Al‐Rizzo, Hussain M.; Chan, Yupo; Adada, Rami

doi:10.1109/sarnof.2007.4567386

Cited by 13 publications

(20 citation statements)

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“…In this paper, we extend our work presented in [7], [8], and [9] by constructing several scenarios using OPNET simulation tool to validate that such an improvement of SIR at the user level leads to a better throughput at the user as well as on the network. However, some of the results previously published [9] are provided in this paper for the purpose of comparison with the constructed scenarios in OPNET.…”

Section: Introductionmentioning

confidence: 90%

“…A set of randomly distributed N users are to be served by these APs. Our algorithm is initiated by balancing the load based on power management algorithm in [8]. Each user is assigned to one and only one AP at any time.…”

Section: The Channel Assignment Modelmentioning

confidence: 99%

“…The authors emphasized that a least congested channel assignment is not efficient with the continued growth of WLANs. Finally, we presented a channel assignment algorithm in [7] that minimizes the interference between neighboring APs after achieving a load-balanced state based on our work published in [8]. Our algorithm showed great improvement in results when channel assignment was applied after load balancing was achieved on the WLAN.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, a brief description of the channel assignment algorithm based on SIR at the user level is followed for clarity reasons. The channel assignment algorithm is performed in two steps: An initial channel assignment is conducted based on [7], where channels are assigned to APs after a loadbalanced state is achieved [8], and then SIR is computed at each user to reassign channels to APs based on maximizing the SIR in the second step [9]. The algorithm in [8] deals with distributing the load more efficiently among APs by reassigning users to different APs while decrementing the transmitted power of the Most Congested AP (MCAP) in discrete steps.…”

Section: Introductionmentioning

confidence: 99%

“…The channel assignment algorithm is performed in two steps: An initial channel assignment is conducted based on [7], where channels are assigned to APs after a loadbalanced state is achieved [8], and then SIR is computed at each user to reassign channels to APs based on maximizing the SIR in the second step [9]. The algorithm in [8] deals with distributing the load more efficiently among APs by reassigning users to different APs while decrementing the transmitted power of the Most Congested AP (MCAP) in discrete steps. The current paper goes one step further to reassign channels based on maximizing the SIR at the users and validates the analytical results through various OPNET [10]simulation scenarios.…”

Section: Introductionmentioning

confidence: 99%

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Throughput Validation of an Advanced Channel Assignment Algorithm in an IEEE 802.11 WLAN

Haidar

Al‐Rizzo²,

Chan³

et al. 2009

2009 International Conference on Communication Software and Networks

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Abstract-In this paper, an enhanced channel-assignment algorithm at the Access Points (APs) of a Wireless Local Area Network (WLAN) is validated. The algorithm aims to maximize the Signal-to-Interference Ratio (SIR) at the user level in order to determine the appropriate channel at the APs. The initial channel assignment step at the APs is based on minimizing the total interference between APs. Based on this initial assignment, the SIR for each user is calculated. Then, another channel assignment is performed based on maximizing the SIR at the users. The algorithm can be applied to any WLAN, irrespective of the user distribution and user load. Results show that the algorithm is capable of significantly increasing the SIR over the WLAN, which in turn should improve throughput. Therefore, we use OPNET simulation tool to construct several realistic scenarios in order to validate our results.

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Section: Introductionmentioning

confidence: 90%

Section: The Channel Assignment Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Throughput Validation of an Advanced Channel Assignment Algorithm in an IEEE 802.11 WLAN

Haidar

Al‐Rizzo²,

Chan³

et al. 2009

2009 International Conference on Communication Software and Networks

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Localized access point selection in infrastructure wireless LANs with performance guarantee

Lu¹,

Wu²

2011

Wireless Communications

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Efficient network management can improve the network performance and reduce the cost of system maintenance and administration. One of the important duties assigned to the network management system in a infrastructure wireless LAN (or simply wireless LAN) is to assign users to appropriate accessible access points (APs). The current AP selection schemes in wireless LANs cause an unbalanced load, which in turn reduces the performance of individual users. This has motivated intensive studies attempting to determine efficient methods to balance loads among different APs. Existing works either provide heuristic solutions without performance guarantees or provide centralized solutions which are not desirable for the AP selection problem. In this paper, we study the localized solutions that can provide performance guarantees. We model the AP selection problem as a matching problem in bipartite graph. Our objective is to maximize total load among all APs. We propose a class of localized heuristics based on different user knowledge models. For some of these localized heuristics, we prove that there exists a constant approximation ratio in terms of expected total load through mathematical analysis. Simulations are conducted to verify our results.

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An Autonomous Load Balancing Framework for UCN

Yildiz

2014

User-Centric Networking

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Optimal load distribution in large scale WLAN networks utilizing a power management algorithm

Abstract: Abstract

Cited by 13 publications

References 1 publication

Throughput Validation of an Advanced Channel Assignment Algorithm in an IEEE 802.11 WLAN

Throughput Validation of an Advanced Channel Assignment Algorithm in an IEEE 802.11 WLAN

Localized access point selection in infrastructure wireless LANs with performance guarantee

An Autonomous Load Balancing Framework for UCN

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