Performance analysis of a threshold-based dynamic TXOP scheme for intra-AC QoS in wireless LANs

Hu, Jia; Min, Geyong; Woodward, M.E.

doi:10.1016/j.future.2013.09.021

Cited by 8 publications

(6 citation statements)

References 27 publications

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“…EDTXOP scheme addresses the above-mentioned limitation of the existing dynamic TXOP limit allocation mechanism [ 13 , 16 ]. Specifically, the EDTXOP mechanism allocates the TXOP limit dynamically based on the number of frame sizes including an appropriate MAC overhead and the maximum transmitted physical data rate through the current channel for high priority IMM traffic over WCNs.…”

Section: Methodsmentioning

confidence: 99%

“…A threshold-based dynamic TXOP (TBD-TXOP) scheme is proposed in [ 13 ] to facilitate the intra-ACs QoS in EDCA. Here, the TXOP limit is adjusted dynamically depending upon the current queue length of IMM traffics and the pre-setting threshold values.…”

Section: Related Workmentioning

confidence: 99%

“…Existing dynamic TXOP allocation schemes have been proposed in [ 12 – 17 ]. Work in [ 12 , 13 ] proposes a threshold-based dynamic TXOP allocation scheme that based on the current status of traffic flow not only sets the minimum and maximum TXOP threshold values but also adjusts the TXOP limit dynamically within these ranges. However, in case of significant variation of the traffic load, especially when the pre-setting threshold values are lower or higher than the current traffic load, the existing system may result in degraded network performance.…”

Section: Introductionmentioning

confidence: 99%

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An enhanced dynamic transmission opportunity scheme to support varying traffic load over wireless campus networks

et al. 2020

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Transmission opportunity (TXOP) is a key factor to enable efficient channel bandwidth utilization over wireless campus networks (WCN) for interactive multimedia (IMM) applications. It facilitates in resource allocation for the similar categories of multiple packets transmission until the allocated time is expired. The static TXOP limits are defined for various categories of IMM traffics in the IEEE802.11e standard. Due to the variation of traffic load in WCN, the static TXOP limits are not sufficient enough to guarantee the quality of service (QoS) for IMM traffic flows. In order to address this issue, several existing works allocate the TXOP limits dynamically to ensure QoS for IMM traffics based on the current associated queue size and pre-setting threshold values. However, existing works do not take into account all the medium access control (MAC) overheads while estimating the current queue size which in turn is required for dynamic TXOP limits allocation. Hence, not considering MAC overhead appropriately results in inaccurate queue size estimation, thereby leading to inappropriate allocation of dynamic TXOP limits. In this article, an enhanced dynamic TXOP (EDTXOP) scheme is proposed that takes into account all the MAC overheads while estimating current queue size, thereby allocating appropriate dynamic TXOP limits within the pre-setting threshold values. In addition, the article presents an analytical estimation of the EDTXOP scheme to compute the dynamic TXOP limits for the current high priority traffic queues. Simulation results were carried out by varying traffic load in terms of packet size and packet arrival rate. The results show that the proposed EDTXOP scheme achieves the overall performance gains in the range of 4.41%—8.16%, 8.72%—11.15%, 14.43%—32% and 26.21%—50.85% for throughput, PDR, average ETE delay and average jitter, respectively when compared to the existing work. Hence, offering a better TXOP limit allocation solution than the rest.

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Section: Methodsmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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An enhanced dynamic transmission opportunity scheme to support varying traffic load over wireless campus networks

et al. 2020

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“…Due to variations in traffic load, the TXOP limit mechanism needs to adapt dynamically. In [7][8][9], the authors represent a dynamic TXOP mechanism to adjust the duration of transmission time of mobile nodes based on the present status of their frames transmission queues. They also implement an analytical model to analyse the performance of the proposed scheme using self-similar traffic.…”

Section: Literature Reviewmentioning

confidence: 99%

Enhancements of the Dynamic TXOP Limit in EDCA Through a High-Speed Wireless Campus Network

Alam

Latif

Akter

et al. 2016

Wireless Pers Commun

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IEEE802.11e is a concrete challenge to providing quality of service (QoS) aimed at interactive multimedia (IMM) applications due to the resource allocation parameter for heterogeneous traffic flows. This parameter is fixed for different specific IMM traffic flows in the IEEE802.11e standard. However, due to the variation in traffic load on wireless campus networks (WCNs), the fixed allocation of the channel resource parameter is not sufficient to guarantee QoS for IMM traffic flows. Thus, many researchers have investigated dynamic regulation of this resource allocation parameter to ensure QoS. However, there are still some unresolved problems with this parameter. This paper introduces an enhanced EDCA resource allocation parameter named dynamic transmission opportunity (TXOP) limit that regulates according to the variation in traffic load over WCN. This work also employs a mathematical modelling approach for the proposed parameter and numerical analysis of the existing and proposed parameters. The evaluation of the proposed model is simulated using Qualnet 5.1. The simulation results show that the proposed scheme allows improving the QoS performance of IMM traffic by reducing endto-end delay. Additionally, the results show that the proposed scheme significantly improves global throughput.

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“…Other papers concentrated on reliable multicast mechanisms [6]- [8] and mathematical modeling of intra-AC prioritization [9], [10]. Additionally, in our previous paper [11] we have presented the general concept of intra-ac prioritization.…”

Section: Introductionmentioning

confidence: 99%

A novel IEEE 802.11aa intra-AC prioritization method for video transmissions

Kosek-Szott

Natkaniec

Prasnal

2014

2014 IEEE Global Communications Conference

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Ensuring QoS guarantees for real-time multimedia traffic in WLANs has recently attracted a lot of attention from standardization bodies and researchers. In order to increase the granularity of traffic prioritization and QoS support provided by EDCA, the intra-access category prioritization mechanism has been proposed in the recent IEEE 802.11aa amendment. In order to improve real time transmission over WLANs, two standard transmission selection algorithms can be used to prioritize traffic within the voice and video access categories of EDCA: the strict priority algorithm and the credit-based shaper algorithm (CBSA). This paper focuses on the improvement of video transmission over WLANs using two video transmission queues (primary and alternate) and the two traffic selection algorithms and compares the behavior of IEEE 802.11aa with legacy EDCA. Additionally, it comments on the possible ways of CBSA implementations. Finally, it proposes an adjustment of CBSA to wireless environment (WCBSA) which gives the most promising results.

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Performance analysis of a threshold-based dynamic TXOP scheme for intra-AC QoS in wireless LANs

Cited by 8 publications

References 27 publications

An enhanced dynamic transmission opportunity scheme to support varying traffic load over wireless campus networks

An enhanced dynamic transmission opportunity scheme to support varying traffic load over wireless campus networks

Enhancements of the Dynamic TXOP Limit in EDCA Through a High-Speed Wireless Campus Network

A novel IEEE 802.11aa intra-AC prioritization method for video transmissions

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