Adjustable TXOP mechanism for supporting video transmission in IEEE 802.11e HCCA

Jansang, Aphirak; Phonphoem, Anan

doi:10.1186/1687-1499-2011-158

Cited by 12 publications

(6 citation statements)

References 15 publications

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“…In MAC layer, the uplink traffic profile can be determined using different ways, such as estimating the data buffer of the flow, predicting the packet generation time and/or traffic load at a specific time, or obtaining actual information through cross-layer architecture design. By having the traffic profile, the HCF can adjust one or more of its functions such as polling [22], SI assignment [23], TXOP allocation mechanisms [24] which allows it to instantaneously adapt to QoS requirement of the flow.…”

Section: A Adaptation To Fluctuation Of Application Profilementioning

confidence: 99%

“…Published from 2004 to 2009 Published since 2010 HCCA Polling [95], [65], [96], [63], [97], [77], [98], [99], [100] [78], [101], [31], [102], [103], [48], [104], [105], [79], [106] TXOP Allocation [56], [18], [66], [107], [81], [108], [109], [25], [110], [111], [112], [54], [29], [39], [55], [24], [113], [61], [34], [36] [114], [38], [115], [62], [116] [59], [60], [26] [92] Admission Control [88], [117], [118], [66], [119], [120]...…”

Section: Areamentioning

confidence: 99%

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Review on QoS provisioning approaches for supporting video traffic in IEEE802.11e: challenges and issues

Al-Maqri,

Alrshah,

Othman

2021

Preprint

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Recently, the demand for multimedia applications is dramatically increased, which in turn increases the portion of video traffic on the Internet. The video streams, which require stringent Quality of Service (QoS), are expected to occupy more than two-thirds of web traffic by 2019. IEEE802.11e has introduced HCF Controlled Channel Access (HCCA) to provide QoS for delay-sensitive applications including highly compressed video streams. However, IEEE802.11e performance is hindered by the dynamic nature of Variable Bit Rate (VBR) video streams in which packet size and interval time are rapidly fluctuating during the traffic lifetime. In order to make IEEE802.11e able to accommodate with the irregularity of VBR video traffic, many approaches have been used in the literature. In this article, we highlight and discuss the QoS challenges in IEEE802.11e. Then, we classify the existing QoS approaches in IEEE802.11e and we also discuss the selection of recent promising and interesting enhancements of HCCA. Eventually, a set of open research issues and potential future directions is presented.

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Section: A Adaptation To Fluctuation Of Application Profilementioning

confidence: 99%

Section: Areamentioning

confidence: 99%

Review on QoS provisioning approaches for supporting video traffic in IEEE802.11e: challenges and issues

Al-Maqri,

Alrshah,

Othman

2021

Preprint

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“…Several approaches such as [4,5,27,33,34,41] have been presented in the literature attempting to remedy the deficiency of the HCCA reference scheduler in supporting QoS for VBR traffics. However, these enhancements are still not sufficient to cope with the fast fluctuating nature of highly compressed video applications since the QSTAs are scheduled according to an estimation about the uplink TSs characteristic which may be far from the real traffics.…”

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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“…On the other hand, HCCA can provide QoS guarantees through resource reservation but it is a centralized and more complex scheme, which is useful in infrastructure networks only [10]. HCCA transfer protocol defines a time parameter which is called transmission opportunity (TXOP) [15], which refers to a time duration during which a Quality of Service Station (QSTA) is allowed to transmit a burst of data frames. These bounded time intervals were introduced to solve the problem with unknown transmission times of polled stations in PCF.…”

Section: Ieee 80211e Hccamentioning

confidence: 99%

Enhancement in QoS for Hybrid Networks Using IEEE 802.11e HCCA with Extended AODV Routing Protocol

Singh¹,

Tripathi²

2015

IJCNS

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The mobile ad hoc network (MANET) with infrastructure networks (hybrid networks) has several practical uses. The utility of hybrid network is increased in real time applications by providing some suitable quality of service. The quality thresholds are imposed on parameters like end-toend delay (EED), jitter, packet delivery ratio (PDR) and throughput. This paper utilizes the extended ad hoc on-demand distance vector (AODV) routing protocol for communication between ad hoc network and fixed wired network. This paper also uses the IEEE 802.11e medium access control (MAC) function HCF Controlled Channel Access (HCCA) to support quality of service (QoS) in hybrid network. In this paper two simulation scenarios are analyzed for hybrid networks. The nodes in wireless ad hoc networks are mobile in one scenario and static in the other scenario. Both simulation scenarios are used to compare the performance of extended AODV with HCCA (IEEE 802.11e) and without HCCA (IEEE802.11) for real time voice over IP (VoIP) traffic. The extensive set of simulations results show that the performance of extended AODV with HCCA (IEEE 802.11e) improves QoS in hybrid network and it is unaffected whether the nodes in wireless ad hoc networks are mobile or static.

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Adjustable TXOP mechanism for supporting video transmission in IEEE 802.11e HCCA

Cited by 12 publications

References 15 publications

Review on QoS provisioning approaches for supporting video traffic in IEEE802.11e: challenges and issues

Review on QoS provisioning approaches for supporting video traffic in IEEE802.11e: challenges and issues

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

Enhancement in QoS for Hybrid Networks Using IEEE 802.11e HCCA with Extended AODV Routing Protocol

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