Providing quality of service over a shared wireless link

Andrews, Matthew; Kumaran, K.; Ramanan, Kavita; Stolyar, Alexander L.; Whiting, Philip; Vijayakumar, R.

doi:10.1109/35.900644

Cited by 1,047 publications

(646 citation statements)

References 2 publications

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“…2) QoS Guarantee: Modified Largest Weighted Delay First (M-LWDF) [66] can provide QoS guarantee by ensuring a minimum throughput guarantee and also to maintain delays smaller than a predefined threshold value with a given probability for each user (rtPS and nrtPS). And, it is provable that the throughput is optimal for LWDF [38].…”

Section: ) Fairnessmentioning

confidence: 99%

Scheduling in IEEE 802.16e mobile WiMAX networks: key issues and a survey

So-In

Jain

Al-Tamimi

2009

IEEE J. Select. Areas Commun.

290

182

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Abstract-Interest in broadband wireless access (BWA) has been growing due to increased user mobility and the need for data access at all times. IEEE 802.16e based WiMAX networks promise the best available quality of experience for mobile data service users. Unlike wireless LANs, WiMAX networks incorporate several quality of service (QoS) mechanisms at the Media Access Control (MAC) level for guaranteed services for data, voice and video. The problem of assuring QoS is basically that of how to allocate available resources among users in order to meet the QoS criteria such as delay, delay jitter and throughput requirements. IEEE standard does not include a standard scheduling mechanism and leaves it for implementer differentiation. Scheduling is, therefore, of special interest to all WiMAX equipment makers and service providers. This paper discusses the key issues and design factors to be considered for scheduler designers. In addition, we present an extensive survey of recent scheduling research. We classify the proposed mechanisms based on the use of channel conditions. The goals of scheduling are to achieve the optimal usage of resources, to assure the QoS guarantees, to maximize goodput and to minimize power consumption while ensuring feasible algorithm complexity and system scalability.

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Section: ) Fairnessmentioning

confidence: 99%

Scheduling in IEEE 802.16e mobile WiMAX networks: key issues and a survey

So-In

Jain

Al-Tamimi

2009

IEEE J. Select. Areas Commun.

290

182

View full text Add to dashboard Cite

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“…Two modified LWDF schemes were proposed in [16,17]. In each time slot, queue j is served so as to maximize the term c j W j r j , where c j is an arbitrary positive constant, W j is the head-of-line packet delay, and r j is the channel capacity for queue j.…”

Section: Related Workmentioning

confidence: 99%

“…The features of easy deployment, wide coverage, and high data rate make IEEE 802. 16 network a promising alternative to Digital Subscriber Line (DSL) and cable modem services to provide broadband wireless access in the suburban and rural areas for supporting real-time applications such as voice over Internet Protocol (VoIP), video conference, and Internet Protocol TV (IPTV). An IEEE 802.16 network is usually composed of a base station (BS) and multiple subscriber stations (SSs), as shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

An efficient delay constrained scheduling scheme for IEEE 802.16 networks

Hou

Shen

2007

Wireless Netw

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In this paper, we propose a simple yet efficient delay-constrained scheduling scheme for IEEE 802.16 networks. The proposed scheduling scheme not only can satisfy delay constraints of different service types by manipulating a simple operation parameter but also can achieve a good fairness performance. An analytical model is developed to evaluate the performance in terms of interservice time, average queue length, and mean waiting time, and is verified through extensive simulations. Furthermore, an implementation procedure of the proposed scheme is given, which reflects the scheme's good features of the fast re-configurability and adaptability.

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“…o The sender updates its threshold according to (2) and (3). In the next section, we evaluate the performance of our proposed MAC protocol and compare it with the standards 802.11 MAC protocol.…”

Section: R Jmentioning

confidence: 99%

“…Improving the overall network capacity and performance requires developing appropriate methods and algorithms to gain knowledge of the user specific radio frequency (RF) condition and application traffic requirement. Innovative techniques in radio resource management have been designed for infrastructure based commercial wireless systems and networks [2] [3]. In this paper, we propose to develop an intelligent MAC protocol with a design approach that focuses on the development of distributed algorithms to exploit time and user diversity to improve the network efficiency.…”

Section: Introductionmentioning

confidence: 99%

Exploiting Time and User Diversity in Distributed Medium Access Control for Mobile Ad-Hoc Networks

Zhang¹,

Benmohamed²,

Wang³

2008

Proceedings of the Fifth International ICST Conference on Heterogeneous Networking for Quality Reliability Security and Robustn

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Abstract-In this paper, we consider a distributed medium access control (MAC) for mobile ad-hoc networks (MANET). We propose an adaptive threshold-based medium contention scheme to exploit diversity gain in multiple dimensions, in particular, the time and user diversity. In our scheme, each node performs a carrier sensing multiple access with collision avoidance (CSMA/CA) MAC protocol and access the channel only when the channel quality is above a threshold. We develop a practical solution to address node mobility and time varying fading channels in a general ad-hoc network model. Our solution consists of channel estimation and prediction, transmission rate selection, and threshold adaptation. We show that an efficient threshold-based solution will need to employ a dynamic loadbased threshold adaptation.Moreover, we show that a distributed MAC algorithm requires additional overhead for time and user diversity control and thus need appropriate tradeoff design to maximize the system capacity. We conduct network simulations to evaluate the performance of our proposed protocol and demonstrate promising throughput increase via time and user diversity. We conclude that the achievable diversity gain in MANET highly depends on the network topology and heterogeneity of link quality and thus remains as a challenging task.Index Terms-medium access control, mobile ad-hoc networks, time and user diversity, 802.11, distributed algorithms

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Providing quality of service over a shared wireless link

Cited by 1,047 publications

References 2 publications

Scheduling in IEEE 802.16e mobile WiMAX networks: key issues and a survey

Scheduling in IEEE 802.16e mobile WiMAX networks: key issues and a survey

An efficient delay constrained scheduling scheme for IEEE 802.16 networks

Exploiting Time and User Diversity in Distributed Medium Access Control for Mobile Ad-Hoc Networks

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