Throughput analysis of IEEE 802.11 and IEEE 802.11e MAC

Ferré, P.; Doufexi, Angela; Nix, Andrew R; Bull, David

doi:10.1109/wcnc.2004.1311286

Cited by 34 publications

(18 citation statements)

References 5 publications

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“…A number of performance analyses (e.g., regarding throughput) of the DCF and EDCF are available in the literature [34], [41]- [45]. These studies confirm also that the EDCA mechanism is indeed capable of achieving stochastic prioritization.…”

Section: ) Dcf and Edcfmentioning

confidence: 58%

Recent and Emerging Topics in Wireless Industrial Communications: A Selection

Willig

2008

IEEE Trans. Ind. Inf.

567

329

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Abstract-In this paper we discuss a selection of promising and interesting research areas in the design of protocols and systems for wireless industrial communications. We have selected topics that have either emerged as hot topics in the industrial communications community in the last few years (like wireless sensor networks), or which could be worthwhile research topics in the next few years (for example cooperative diversity techniques for error control, cognitive radio/opportunistic spectrum access for mitigation of external interferences).Index Terms-Cognitive radio, IEEE 802154, industrial-QoS, spatial and cooperative diversity, ultra-wideband, wireless sensor networks, ZigBee.

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Section: ) Dcf and Edcfmentioning

confidence: 58%

Recent and Emerging Topics in Wireless Industrial Communications: A Selection

Willig

2008

IEEE Trans. Ind. Inf.

567

329

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“…In-depth studies of the IEEE 802.11 MAC can be found in [7]- [9]. This MAC relies on a Stop and Wait ARQ retransmission scheme.…”

Section: A Ieee 80211 A/g Phy and Macmentioning

confidence: 99%

“…Furthermore, an exponential random backoff is implemented prior to each transmission. The throughput efficiency of the MAC is analytically given by (derived from [7]- [9])…”

Section: A Ieee 80211 A/g Phy and Macmentioning

confidence: 99%

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Robust Video Transmission Over Wireless LANs

Ferré

Doufexi

Chung-How

et al. 2008

IEEE Trans. Veh. Technol.

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Abstract-Home wireless networks are mainly used for data transmission; however, they are now being used in video delivery applications, such as video on demand or wireless internet protocol (IP) television. Off-the-shelf technologies are inappropriate for the delivery of real-time video. In this paper, a packetization method is presented for robust H.264 video transmission over the IEEE 802.11 wireless local area network (WLAN) configured as a wireless home network. To overcome the poor throughput efficiency of the IEEE 802.11 Medium Access Control (MAC), an aggregation scheme with a recovery mechanism is deployed and evaluated via simulation. The scheme maps several IP packets (each containing a single H.264 video packet called a Network Abstraction Layer (NAL) unit) into a single larger MAC frame. Video robustness is enhanced by using small NAL units and by retrieving possible error-free IP packets from the received MAC frame. The required modifications to the legacy MAC are described. Results in terms of throughput efficiency and peak-signal-to-noise ratio (PSNR) are presented for the case of broadcast and real-time transmission applications. Compared to the legacy case, an 80% improvement in throughput efficiency is achieved for a similar PSNR video performance. For fixed physical layer resources, our system provides a 2.5-dB gain in video performance over the legacy case for a similar throughput efficiency. The proposed solution provides considerable robustness enhancement for video transmission over IEEE 802.11-based WLANs.Index Terms-Medium Access Control (MAC), packetization, peaksignal-to-noise ratio (PSNR), video transmission, wireless local area networks (WLANs).

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“…The performance of the 802.11 protocol has been widely studies in the literature [2]. However, as discussed in [3], most studies are based on static channel models, where the PHY layer packet error rate (PER) is independent of time.…”

Section: Introductionmentioning

confidence: 99%