Quality of Service Oriented Access Point Selection Framework for Large Wi-Fi Networks

Raschellà, Alessandro; Bouhafs, Faycal; Seyedebrahimi, Mirghiasaldin; Mackay, Michael; Shi, Qi

doi:10.1109/tnsm.2017.2678021

Cited by 44 publications

(63 citation statements)

References 37 publications

(83 reference statements)

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“…Wong et al [15] consider the cost of user migration in the process of user reassociation and propose an efficient approximation algorithm to achieve max-min fairness, while satisfying a certain total user migration cost constraint. Raschellà et al [16] present a centralized network management framework for user association based on softwaredefined networking (SDN), where an AP section metric jointly considers the QoS requirements of a user joining the network, the bandwidth efficiency, and the QoS requirements of other users active in the networks.…”

Section: Related Workmentioning

confidence: 99%

“…User association is an important issue in WLAN research, and it aims to determine AP selection for each user and optimize APs' resource allocation. Most existing studies focus on performance optimization-such as load balancing, user fairness, and user quality of service (QoS)-and they propose several user association approaches [11][12][13][14][15][16][17][18]. However, little attention has been paid to energy efficiency and the impact of different association solutions on saving energy [19].…”

Section: Introductionmentioning

confidence: 99%

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Energy‐Efficient User Association with Congestion Avoidance and Migration Constraint in Green WLANs

Luo

Dong

et al. 2018

Wireless Communications and Mobile Computing

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Green wireless local area networks (WLANs) have captured the interests of academia and industry recently, because they save energy by scheduling an access point (AP) on/off according to traffic demands. However, it is very challenging to determine user association in a green WLAN while simultaneously considering several other factors, such as avoiding AP congestion and user migration constraints. Here, we study the energy-efficient user association with congestion avoidance and migration constraint (EACM). First, we formulate the EACM problem as an integer linear programming (ILP) model, to minimize APs' overall energy consumption within a time interval while satisfying the following constraints: traffic demand, AP utilization threshold, and maximum number of demand node (DN) migrations allowed. Then, we propose an efficient migration-constrained user reassociation algorithm, consisting of two steps. The first step removes AP-DN associations to eliminate AP congestion and turn off as many idle APs as possible. The second step reassociates these DNs according to an energy efficiency strategy. Finally, we perform simulation experiments that validate our algorithm's effectiveness and efficiency.

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Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy‐Efficient User Association with Congestion Avoidance and Migration Constraint in Green WLANs

Luo

Dong

et al. 2018

Wireless Communications and Mobile Computing

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“…2. In this architecture, management solutions are implemented as applications on the northbound API of the SDN controller and algorithms for AP selection [23], [24], chan- nel assignment [25], [26], and RRM [27] have been already proposed for implementation to address spectrum congestion in Wi-Fi networks. The Wi-5 architecture defines a Spectrum Plane which enhances the operational capabilities of IEEE 802.11 APs by defining new monitoring and configuration primitives, and making APs programmable, thereby enabling fine-grained spectrum allocation and management.…”

Section: A Wi-5 Sdn Architecturementioning

confidence: 99%

“…Specifically, according to the 802.11g/a/n standards, there exists a set of defined bit rate levels included between 1 Mbps and 54 Mbps that can be provided by the nodes. Each of these bit rate levels represents the maximum link capacity in Wi-Fi APs, b W F i,j , between flow i and AP j that can be computed using SIN R i,j and BW j , which is the bandwidth assigned to AP j in Hz, through the Shannon-Hartley theorem [24]. In detail, first the parameter…”

Section: A Available Bit Ratementioning

confidence: 99%

QoS aware radio access technology selection framework in heterogeneous networks using SDN

Raschellà

Bouhafs

Deepak³

et al. 2017

J. Commun. Netw.

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This paper addresses the problem of radio access technology (RAT) selection in heterogeneous networks (HetNets). Current approaches rely on signal related metrics such as signal to interference plus noise ratio (SINR) for selection of the best network for the wireless user. However, such approaches do not take into account the quality of service (QoS) requirements of wireless users and therefore often do not connect them to the most suitable network. We propose a QoS aware RAT selection framework for HetNets based on software-defined networking (SDN). The proposed framework implements a RAT selection strategy that reflects QoS requirements of downlink flows using a metric called fittingness factor (FF). The framework relies on the flexibility and centralised nature of SDN to implement monitoring and RAT capacity assessment mechanisms that help in the realisation of the selection strategy. The simulation campaign illustrates the important gains achieved by our RAT selection framework in terms of data rates assigned to the wireless users, their satisfaction, and their quality of experience (QoE) compared against other state of the art RAT selection solutions.

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“…Here, the received signal strength indicator is based on the QoS requirements [50]. Note that S has a total of 2 N subsets and there are ( N k ) ways to choose a subset of k elements.…”

Section: System Model Of Wioms and Network Optimisation Problemmentioning

confidence: 99%

On the Optimisation of Practical Wireless Indoor and Outdoor Microcells Subject to QoS Constraints

Omorinoye

Vien

2017

Applied Sciences

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Wireless indoor and outdoor microcells (WIOMs) have emerged as a promising means to deal with a high demand of mobile users for a variety of services. Over such heterogeneous networks, the deployment of WIOMs costs mobile/telecommunications company high capital expenditures and operating expenses. This paper aims at optimising the WIOMs taking into account various network communication environments. We first develop an optimisation problem to minimise the number of cells as well as determining their optimal locations subject to the constraints of the coverage and quality-of-service (QoS) requirements. In particular, we propose a binary-search based cell positioning (BSCP) algorithm to find the optimal number of cells given a preset candidate antenna positions. The proposed BSCP algorithm is shown to not only reduce the number of cells for saving resources but also requires a low computational complexity compared to the conventional approaches with exhaustive search over all available sites. Moreover, EDX SignalPro is exploited as a simulation platform to verify the effectiveness of the proposed BSCP for the WIOMs with respect to various propagation modes and antenna parameters of different types, including isotropic, multiple-input single-output and multiple-input multiple-output.

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Quality of Service Oriented Access Point Selection Framework for Large Wi-Fi Networks

Cited by 44 publications

References 37 publications

Energy‐Efficient User Association with Congestion Avoidance and Migration Constraint in Green WLANs

Energy‐Efficient User Association with Congestion Avoidance and Migration Constraint in Green WLANs

QoS aware radio access technology selection framework in heterogeneous networks using SDN

On the Optimisation of Practical Wireless Indoor and Outdoor Microcells Subject to QoS Constraints

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