Dynamic Bandwidth Request-Allocation Algorithm for Real-Time Services in IEEE 802.16 Broadband Wireless Access Networks

Park, Kyung‐Joon; Kim, Hwangnam; Kim, Han-Seok

doi:10.1109/infocom.2008.137

Cited by 19 publications

(4 citation statements)

References 6 publications

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“…The VBR scheme is commonly used in MPEG‐2 and MPEG‐4 video data. In this study, we mainly take MPEG‐4 data as examples since it plays a dominant role in many video streaming and conferencing applications 12–14. Figure 1 shows a typical output of the MPEG‐4 VBR video codec, which is derived from a movie file in our experiment.…”

Section: Vbr Video Trafficmentioning

confidence: 99%

Efficient uplink scheduling policy for variable bit rate traffic in IEEE 802.16 BWA systems

Chen¹,

Deng²,

Hsu³

et al. 2011

Int J Communication

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One of the major challenges in the context of transmitting real-time multimedia data in broadband wireless access (BWA) systems is that the varied bit rate of traffic causes low bandwidth utilization. The conventional uplink scheduling algorithms for variable bit rate (VBR) video traffic transmission in IEEE 802.16 BWA systems have some disadvantages, including waste of uplink bandwidth, MAC overhead, and access delay. To cope with these difficulties, we propose an uplink scheduling algorithm for VBR traffic transmission for IEEE 802.16 BWA systems. In the proposed algorithm, the base station (BS) assigns uplink bandwidth to the video user by considering the traffic state transitions. The uplink bandwidth is equally divided into several intervals where each interval represents a traffic state. Only when the traffic state is changed, the bandwidth request process is incurred. Also, by using two reserved bits in the generic MAC header of IEEE 802.16 BWA systems as piggyback bits, the information about traffic state transition can be sent to the BS without extra overhead. Simulations conducted with QualNet 4.0 show that the bandwidth waste ratio of our proposed algorithm is less than that of the conventional algorithms. That is, the proposed algorithm outperforms the conventional algorithms for VBR traffic transmission in IEEE 802.16 BWA systems in terms of bandwidth utilization.

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Section: Vbr Video Trafficmentioning

confidence: 99%

Efficient uplink scheduling policy for variable bit rate traffic in IEEE 802.16 BWA systems

Chen¹,

Deng²,

Hsu³

et al. 2011

Int J Communication

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show abstract

“…The CAC and BR problems have largely been investigated in previous study [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The authors of [2,3] propose to adopt minimum bandwidth requirements as the admission criteria for all classes of scheduling services.…”

Section: Introductionmentioning

confidence: 99%

Dynamic admission control and bandwidth reservation for IEEE 802.16e mobile WiMAX networks

Wang

Yan

2012

J Wireless Com Network

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The article presents a dynamic connection admission control (CAC) and bandwidth reservation (BR) scheme for IEEE 802.16e Broadband Wireless Access networks to simultaneously improve the utilization efficiency of network resources and guarantee QoS for admitted connections. The proposed CAC algorithm dynamically determines the admission criteria according to network loads and adopts an adaptive QoS strategy to improve the utilization efficiency of network resources. After new or handoff connections enter the networks based on current admission criteria, the proposed adaptive BR scheme adjusts the amount of reserved bandwidth for handoffs according to the arrival distributions of new and handoff connections in order to increase the admission opportunities of new connections and provide handoff QoS as well. We conduct simulations to compare the performance of our proposed CAC algorithm and BR scheme with that of other approaches. The results illustrate that our approach can effectively improve the network efficiency in terms of granting more connections by as large as about 22% in comparison with other schemes, and can also guarantee adaptive QoS for admitted new and handoff connections.

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“…The authors in (18) proposed a new QoS control scheme by considering MAC-PHY cross-layer resource allocation. A dynamic bandwidth requestallocation algorithm for real-time services is proposed in (19). The authors predict the amount of bandwidth to be requested based on the information of the backlogged amount of traffic in the queue and the rate mismatch between packet arrival and service rate to improve the bandwidth utilization.…”

Section: Motivation and Related Workmentioning

confidence: 99%

Bandwidth and Power Management in Broadband Wireless Networks

Chuck

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Dynamic Bandwidth Request-Allocation Algorithm for Real-Time Services in IEEE 802.16 Broadband Wireless Access Networks

Cited by 19 publications

References 6 publications

Efficient uplink scheduling policy for variable bit rate traffic in IEEE 802.16 BWA systems

Efficient uplink scheduling policy for variable bit rate traffic in IEEE 802.16 BWA systems

Dynamic admission control and bandwidth reservation for IEEE 802.16e mobile WiMAX networks

Bandwidth and Power Management in Broadband Wireless Networks

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