PUMA - a new channel access protocol for wireless LANs

Natkaniec, Marek; Pach, Andrzej R.

doi:10.1109/wpmc.2002.1088400

Cited by 11 publications

(7 citation statements)

References 6 publications

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“…IFS differentiation can also be used in combination with jamming protocols (Section IV-C) [43], [44], [45], [46], or reservation-based protocols (Section IV-F) [47]. The previously described principle remains unchanged: before jamming the channel or performing a slot reservation, stations sending high priority traffic wait for the channel to be free for a shorter period than stations sending low priority traffic.…”

Section: B Ifs Differentiationmentioning

confidence: 99%

“…The PUMA (Priority Unavoidable Multiple Access) protocol [43] supports strict prioritization because real-time data frames are always transmitted before non-real-time data frames. Every station that wants to start a transmission of realtime traffic sends out a jamming signal of the length of one slot if the channel has been idle for a PIFS.…”

Section: Jammingmentioning

confidence: 99%

“…The original idea of frame aggregation in wireless networks was proposed in the FAMA protocol [57], however the first QoS-aware protocol that uses this technique is PUMA [43]. This mechanism is used in PUMA only for the transmission of real-time traffic.…”

Section: Frame Aggregationmentioning

confidence: 99%

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A Survey of Medium Access Mechanisms for Providing QoS in Ad-Hoc Networks

Natkaniec

Kosek-Szott

Szott

et al. 2013

IEEE Commun. Surv. Tutorials

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In this survey we attempt to describe the Quality of Service (QoS) mechanisms employed by Medium Access Control (MAC) protocols designed for ad-hoc networks. We begin with background information: an overview of the related work, the definition of QoS and QoS-related metrics, a general description of contention-free and contention-based protocols for wireless networks, a discussion of issues affecting QoS provisioning in ad-hoc networks, as well as a novel classification of the QoS mechanisms. Then, each mechanism is briefly explained and implementation examples from different protocols are provided.Furthermore, a separate section is devoted to the completed and ongoing standardization work in the field. Afterwards, an extensive comparison of salient features, advantages and disadvantages of all described MAC mechanisms is given in order to guide future protocol designers. Finally, we comment on the most probable future research directions. Based on the presented survey, we observe that QoS provisioning is not only challenging but also a significant contemporary research problem. The protocol designs presented in the literature usually involve trade-offs between certain metrics, and currently there is no ideal solution which deals with all the issues affecting ad-hoc networks. Therefore, we trust that this survey will be of great help to designers of future QoS-aware protocols.

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Section: B Ifs Differentiationmentioning

confidence: 99%

Section: Jammingmentioning

confidence: 99%

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A Survey of Medium Access Mechanisms for Providing QoS in Ad-Hoc Networks

Natkaniec

Kosek-Szott

Szott

et al. 2013

IEEE Commun. Surv. Tutorials

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“…The improvement is mainly due to the selection of a better algorithm for selecting the backoff interval. Instead of the BEB used in the original DCF, the backoff interval of the p-persistent 802.11 is sampled from a geometric distribution with parameter p. Natkaniec and Pach (2002) developed the MAC protocol called Priority Unavoidable Multiple Access (PUMA) to improve the performance of DCF. The key concept is to introduce a priority scheme for time bounded services.…”

Section: Privious Work On the Enhancement Of Dcfmentioning

confidence: 99%

“…MACAW (Bharghavan, 1994), PUMA (Natkaniec & Pach, 2002), FCR (Kwon et al, 2003), p-persistent 802.11 (Bruno et al, 2002), dynamic 802.11 (Cali & Conti, 2000), C-PRMA (Bianchi et al, 1997), Pij-persistent backoff (Ozugur et al, 1999).…”

Section: The Proposed Buma Protocolmentioning

confidence: 99%

Improving WLAN Performance by Modifying an IEEE 802.11 Protocol

Sarkar

2011

International Journal of Wireless Networks and Broadband Technologies

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One of the limitations of the IEEE 802.11 distributed coordination function (DCF) protocol is its low bandwidth utilization under medium-to-high traffic loads resulting in low throughput and high packet delay. To overcome performance problems, traditional IEEE 802.11 DCF (“DCF”) protocol is modified to the buffer unit multiple access (BUMA) protocol. The BUMA protocol achieves a better system performance by introducing a temporary buffer unit at the medium access control (MAC) layer to accumulate multiple packets and combine them into a single packet (with a header and a trailer) before transmission. This paper provides an in-depth performance evaluation (by simulation) of BUMA for multiuser ad hoc and infrastructure networks. Results obtained show that the BUMA is more efficient than that of DCF. The BUMA protocol is simple and its algorithm (software) can be upgraded to 802.11 networks requiring no hardware changes. The BUMA protocol is described and simulation results are presented to verify the performance.

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