A greedy reclaiming scheduler for IEEE 802.11e HCCA real-time networks

Ruscelli, Anna Lina; Cecchetti, Gabriele; Mastropaolo, Antonia; Lipari, Giuseppe

doi:10.1145/2068897.2068936

Cited by 12 publications

(12 citation statements)

References 20 publications

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“…These types of solutions, although feasible, result in the degradation of the overall bandwidth utilization when the data rate decreases. Another approach to handle fluctuating and VBRs is to apply a bandwidth reclaiming scheme …”

Section: Related Workmentioning

confidence: 99%

“…Another approach to handle fluctuating and VBRs is to apply a bandwidth reclaiming scheme. [11][12][13][14] A prediction scheme was proposed, 15 namely, the HCCA scheduler that dynamically modifies the default arbitration inter-frame space number (AIFSN) values with the aim of enhancing the voice and video communications. The prediction scheme is implemented by carrying out the construction of a J48 decision tree classifier.…”

Section: Related Workmentioning

confidence: 99%

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High performing multimedia transmission approach based on QoS support and admission control over IEEE 802.11e networks

Al-Maqri

Mansoor

Sabri

et al. 2020

Int J Communication

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Summary Hybrid coordination function controlled channel access (HCCA) is a medium to enhance quality of service (QoS) via the IEEE 802.11e standard. The main limitation of HCAA is that it is only efficient for constant bit rate (CBR) applications. This is due to the nature of its scheduler that allocates transmission opportunities (TXOPs) based on traffic stream (TS) specifications (TSPECs) that are determined during the traffic setup time. Variable bit rate (VBR) traffics used in HCCA have nondeterministic profile, making it not optimally and efficiently supported by HCCA. The result of this inefficiency is a deterioration of the transmission performance of multimedia data as well as a drop in the number of served QoS video traffics. We propose a novel approach to deal with this issue, which is the feedback‐based admission control unit (FACU). FACU works by optimizing the usage of extra bandwidth to ensure optimal transmission performance of multimedia data. FACU achieves this by exploiting piggybacked information concerning sequential video frames in order to accurately assign the TXOP. The proposed approach is evaluated by utilizing various video sequences. It is demonstrated that FACU maximizes the overall number of video streams and optimizes the overall usage of the network without having any adverse effects on the QoS constraints determined.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

High performing multimedia transmission approach based on QoS support and admission control over IEEE 802.11e networks

Al-Maqri

Mansoor

Sabri

et al. 2020

Int J Communication

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“…However, it will much degrade the bandwidth utilization when the data rate drops down. The other one is by applying a bandwidth reclaiming scheme [4,10,40,43]. The other case is when data rate drops below its average value declared in the TSPEC of the TS.…”

Section: Transmission Of Mpeg-4 Video In Hccamentioning

confidence: 99%

Adaptive multi-polling scheduler for QoS support of video transmission in IEEE 802.11e WLANs

et al. 2015

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The 802.11E Task Group has been established to enhance Quality of Service (QoS) provision for time-bounded services in the current IEEE 802.11 Medium Access Control (MAC) protocol. The QoS is introduced throughout Hybrid Coordination Function Controlled Channel Access (HCCA) for the rigorous QoS provision. In HCCA, the station is allocated a fixed Transmission Opportunity (TXOP) based on its TSPEC parameters so that it is efficient for Constant Bit Rate streams. However, as the profile of Variable Bit Rate (VBR) traffics is inconstant, they are liable to experience a higher delay especially in bursty traffic case. In this paper, we present a dynamic TXOP assignment algorithm called Adaptive Multi-polling TXOP scheduling algorithm (AMTXOP) for supporting the video traffics transmission over IEEE 802.11e wireless networks. This scheme invests a piggybacked information about the size of the subsequent video frames of the uplink streams to assist the Hybrid Coordinator accurately assign the TXOP according to actual change in the traffic profile. The proposed scheduler is powered by integrating multi-polling scheme to further reduce the delay and polling overhead. Extensive simulation experiments have been carried out to show the efficiency of the AMTXOP over the existing schemes in terms of the packet delay and the channel utilization.

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“…Unused Time Shifting Scheduler [30] is based on a greedy reclaiming scheme that recovers the unspent time from previous polled stations and assigns that to the next polled one in order to provide further resources to serve bursty traffic.…”

Section: Scheduling Estimated Transmission Time -Earliest Due Datementioning

confidence: 99%

“…Also dynamically modify, at each polling, the T XOP computation can yet jeopardizes the admission control feasibility test. Instead, a method suitable for providing a dynamic T XOP, without changes in the accorded resources threshold, is a bandwidth reclaiming scheme [6,9,24,28,30].…”

Section: Introductionmentioning

confidence: 99%

Dynamic TXOP HCCA reclaiming scheduler with transmission time estimation for IEEE 802.11e real-time networks

Cecchetti

Ruscelli

Mastropaolo

et al. 2012

Proceedings of the 15th ACM International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems

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IEEE 802.11e HCCA reference scheduler guarantees Quality of\ud Service only for Constant Bit Rate traffic streams, whereas its as-\ud signment of scheduling parameters (transmission time TXOP and\ud polling period) is too rigid to serve Variable Bit Rate (VBR) traffic.\ud This paper presents a new scheduling algorithm, Dynamic TXOP\ud HCCA (DTH). Its scheduling scheme, integrated with the central-\ud ized scheduler, uses both a statistical estimation of needed trans-\ud mission duration and a bandwidth reclaiming mechanism with the\ud aim of improving the resource management and providing an in-\ud stantaneous dynamic Transmission Opportunity (TXOP), tailored\ud to multimedia applications with variable bit rate. Performance evaluation through simulation, confirmed by the scheduling analysis, shows that DTH is suitable to reduce the transmission queues length.\ud This positively impacts on the delay and on packets drop rate experienced by VBR traffic streams

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A greedy reclaiming scheduler for IEEE 802.11e HCCA real-time networks

Cited by 12 publications

References 20 publications

High performing multimedia transmission approach based on QoS support and admission control over IEEE 802.11e networks

High performing multimedia transmission approach based on QoS support and admission control over IEEE 802.11e networks

Adaptive multi-polling scheduler for QoS support of video transmission in IEEE 802.11e WLANs

Dynamic TXOP HCCA reclaiming scheduler with transmission time estimation for IEEE 802.11e real-time networks

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