Service Differentiation for the Bandwidth Request Scheme in Fixed IEEE 802.16 Networks

Chen, Kai; Yi, Zhou; He, Junjia; Tang, Zuoyin

doi:10.1109/iccsc.2008.157

Cited by 3 publications

(3 citation statements)

References 12 publications

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“…We also acquired the similar results at other network status in Ref. [11], so we suggest that the service can be better differentiated when the initial backoff window and bandwidth allocation priority are jointly used.…”

Section: Resultssupporting

confidence: 62%

A simulation study of service differentiation for the bandwidth request scheme in fixed IEEE 802.16 network

Chen

et al. 2009

J. Shanghai Jiaotong Univ. (Sci.)

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Various flexible mechanisms related to quality of service (QoS) provisioning have been specified for uplink traffic at the medium access control (MAC) layer in the IEEE 802.16 standards. Among the mechanisms, contention based bandwidth request scheme can be used to indicate bandwidth demands to the base station for the non-real-time polling and best-effort services. These two services are used for most applications with unknown traffic characteristics. Due to the diverse QoS requirements of those applications, service differentiation (SD) is anticipated over the contention based bandwidth request scheme. In this paper we investigate the SD with the bandwidth request scheme by means of assigning different channel access parameters and bandwidth allocation priorities at different packets arrival probability. The effectiveness of the differentiation schemes is evaluated by simulations. It is observed that the initial backoff window can be efficient in SD, and if combined with the bandwidth allocation priority, the SD performances will be better.

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Section: Resultssupporting

confidence: 62%

A simulation study of service differentiation for the bandwidth request scheme in fixed IEEE 802.16 network

Chen

et al. 2009

J. Shanghai Jiaotong Univ. (Sci.)

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“…Vinel et al [15] computed the mean delay of the bandwidth request in the IEEE 802.16d/e by two-dimensional Markov chain model under the unicast polling scheme with the error-prone wireless channel and the unsaturated condition. As for the proposed bandwidth request schemes to support QoS in IEEE 802.16d/e, we refer to [16][17][18][19][20].…”

Section: Related Workmentioning

confidence: 99%

Performance analysis of bandwidth requests under unicast, multicast and broadcast pollings in IEEE 802.16d/e

et al. 2010

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In the polling mode in IEEE 802.16d/e, one of three modes: unicast, multicast and broadcast pollings, is used to reserve bandwidth for data transmission. In the unicast polling, the BS polls each individual MS to allow to transmit a bandwidth request packet, while in the multicast and broadcast pollings, the truncated binary exponential backoff (TBEB) mechanism is adopted as a contention resolution among mobile stations (MSs) in a multicast or broadcast group. This paper investigates the delay of bandwidth requests in the unicast, multicast and broadcast pollings, by deriving the delay distribution of the unicast polling and the TBEB by means of analytical methods. We consider an error-free channel as well as an error-prone channel with i.i.d. constant packet error rate per frame. Furthermore, we find the utilization of transmission opportunity to see efficiency of the bandwidth in the TBEB. Performance evaluations are provided to show that analytical results are wellmatched with simulations. By the numerical results, we can find the optimal parameters such as the initial backoff window size of the TBEB and the number of transmission opportunities (or slots) satisfying quality of service (QoS) requirement on delay and loss, and thus we can determine which scheme is better than others depending on the probability of a request arrival during one frame. Numerical examples address that the TBEB performs better than the unicast polling for light traffic loads and vice versa for heavy traffic loads. Also, it is shown that the multicast polling has better performance than the broadcast polling in the sense of shorter delay, lower loss probability and higher utilization of transmission opportunity.

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“…In this paper, we investigate several SD approaches for the bandwidth request scheme with limited bandwidth. As the bandwidth request scheme is anticipated to support applications with diverse QoS requirements, for example, emergency services with bursty traffic and real-time voting for live entertainments, it is important to implement SD over the bandwidth request scheme to support diverse QoS requirements [19]. A QoS differentiation scheme for IEEE 802.16 mesh network was investigated in [20].…”

Section: Introductionmentioning

confidence: 99%

Service Differentiation in OFDM-Based IEEE 802.16 Networks

Chen

et al. 2009

J Wireless Com Network

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IEEE 802.16 network is widely viewed as a strong candidate solution for broadband wireless access systems. Various flexible mechanisms related to QoS provisioning have been specified for uplink traffic at the medium access control (MAC) layer in the standards. Among the mechanisms, bandwidth request scheme can be used to indicate and request bandwidth demands to the base station for different services. Due to the diverse QoS requirements of the applications, service differentiation (SD) is desirable for the bandwidth request scheme. In this paper, we propose several SD approaches. The approaches are based on the contention-based bandwidth request scheme and achieved by the means of assigning different channel access parameters and/or bandwidth allocation priorities to different services. Additionally, we propose effective analytical model to study the impacts of the SD approaches, which can be used for the configuration and optimization of the SD services. It is observed from simulations that the analytical model has high accuracy. Service can be efficiently differentiated with initial backoff window in terms of throughput and channel access delay. Moreover, the service differentiation can be improved if combined with the bandwidth allocation priority approach without adverse impacts on the overall system throughput.

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Service Differentiation for the Bandwidth Request Scheme in Fixed IEEE 802.16 Networks

Cited by 3 publications

References 12 publications

A simulation study of service differentiation for the bandwidth request scheme in fixed IEEE 802.16 network

A simulation study of service differentiation for the bandwidth request scheme in fixed IEEE 802.16 network

Performance analysis of bandwidth requests under unicast, multicast and broadcast pollings in IEEE 802.16d/e

Service Differentiation in OFDM-Based IEEE 802.16 Networks

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