Adaptive delay threshold-based priority queueing scheme for packet scheduling in mobile broadband wireless access system

Ku, J.M.; Kim, S.K.; Kim, S.H.; Shin, Simon; Kim, J.H.; Kang, Chung G.

doi:10.1109/wcnc.2006.1683631

Cited by 9 publications

(17 citation statements)

References 7 publications

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“…This scheme is based on the tradeoff of the packet loss rate performance of rtPS with average data throughput of nrtPS with a fixed data rate. Rather than fixing the delay, the author also introduced an adaptive delay threshold-based priority queuing scheme which takes both the urgency and channel state condition for real-time users adaptively into consideration [48].…”

Section: A Channel-unaware Schedulersmentioning

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: A Channel-unaware Schedulersmentioning

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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“…In (Kim & Kang, 2005) and (Ku et al, 2006), the authors proposed a packet scheduling scheme called DTPQ (Delay Threshold-based priority Queuing) where both real time (RT) and non-real time (NRT) services are supported. The purpose of the proposed DTPQ scheduling scheme aims to maximize the number of users in the system and increasing the total service revenue.…”

Section: Downlink Homogeneous Schedulersmentioning

confidence: 99%

“…The main important parameters taken into account in this scheduling policy is the weight of both RT and NRT services denoted by  RT and  NRT respectively. The downlink packet-scheduling scheme proposed in (Kim & Kang, 2005) does not address how the delay threshold can be set while an adaptive version of DTPQ scheme is implemented in (Ku et al, 2006). In fact, the delay threshold is updated based on the variation of the weighted sum of the delay for the most urgent RT users and average data rate for RT users.…”

Section: Downlink Homogeneous Schedulersmentioning

confidence: 99%

A Comprehensive Survey on WiMAX Scheduling Approaches

Fourati¹,

Saddoud²,

Mâaloul³

et al. 2012

Quality of Service and Resource Allocation in WiMAX

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“…In the simulation, a hexagonal cell layout with a wraparound structure is considered over 2 tiers, i.e., 19 cells [9]. Each cell is sectorized by a directional antenna.…”

Section: A Simulation Scenariomentioning

confidence: 99%

“…This model is often found in the 3GPP standardization context. The log-normal shadowing model is specified with a standard deviation of 8 dB and a correlation distance of 50 m. Furthermore, the ITU-R M. 1390 recommendation is implemented for the multi-path fading channel under a terminal mobility of 60 km/h [9]. It is assumed in an ideal situation, that the channel quality indication is fed back without any error and delay, i.e., the downlink channel conditions are always perfectly known.…”

Section: A Simulation Scenariomentioning

confidence: 99%

Opportunistic packet scheduling algorithm for non-real-time service with a soft QoS requirement in a mobile broadband wireless access system

et al. 2008

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In this paper, we present a packet scheduling algorithm for a non-real-time service, with soft QoS requirements, which allows for degrading the QoS level, e.g., typically the packet delay, whenever necessary, in mobile broadband wireless Internet access systems. This algorithm is designed to properly trade off system throughput and delay performance, which can improve the system capacity by relaxing the delay constraint with respect to the underlying soft QoS requirement. This is as opposed to most of the existing packet scheduling algorithms for non-real-time service which are simply designed to maximize the system throughput without a delay constraint. The proposed adaptive exponential scheduling algorithm intentionally introduces additional delay to some users, especially under bad channel conditions, opportunistically allowing for serving users only under good channel conditions, as long as the resulting QoS degradation is acceptable for non-real-time service users. The results from a system-level simulation demonstrate that the system capacity can be significantly increased over existing algorithms, by as much as 65%, using the adaptive exponential scheduling algorithm while satisfying the given QoS-level requirements.

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Adaptive delay threshold-based priority queueing scheme for packet scheduling in mobile broadband wireless access system

Cited by 9 publications

References 7 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

A Comprehensive Survey on WiMAX Scheduling Approaches

Opportunistic packet scheduling algorithm for non-real-time service with a soft QoS requirement in a mobile broadband wireless access system

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