Future evolution of CSMA protocols for the IEEE 802.11 standard

Sanabria-Russo, Luis; Faridi, Azadeh; Bellalta, Boris; Barceló, Jaume; Oliver, Miquel

doi:10.1109/iccw.2013.6649433

Cited by 26 publications

(37 citation statements)

References 21 publications

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“…In [13] a new method to use OFDMA over the UL is suggested, where MAC Protocol Data Units (MPDU) from the stations are of different lenghs. In [14][15][16][17]…”

Section: Previous Workmentioning

confidence: 99%

Scheduling Strategies and Throughput Optimization for the Uplink for IEEE 802.11ax and IEEE 802.11ac Based Networks

Sharon¹,

Alpert²

2017

WSN

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The new IEEE 802.11 standard, IEEE 802.11ax, has the challenging goal of serving more Uplink (UL) traffic and users as compared with his predecessor IEEE 802.11ac, enabling consistent and reliable streams of data (average throughput) per station. In this paper we explore several new IEEE 802.11ax UL scheduling mechanisms and compare between the maximum throughputs of unidirectional UDP Multi Users (MU) triadic. The evaluation is conducted based on Multiple-Input-Multiple-Output (MIMO) and Orthogonal Frequency Division Multiple Access (OFDMA) transmission multiplexing format in IEEE 802.11ax vs. the CSMA/CA MAC in IEEE 802.11ac in the Single User (SU) and MU modes for 1, 4, 8, 16, 32 and 64 stations scenario in reliable and unreliable channels. The comparison is conducted as a function of the Modulation and Coding Schemes (MCS) in use. In IEEE 802.11ax we consider two new flavors of acknowledgment operation settings, where the maximum acknowledgment windows are 64 or 256 respectively. In SU scenario the throughputs of IEEE 802.11ax are larger than those of IEEE 802.11ac by 64% and 85% in reliable and unreliable channels respectively. In MU-MIMO scenario the throughputs of IEEE 802.11ax are larger than those of IEEE 802.11ac by 263% and 270% in reliable and unreliable channels respectively. Also, as the number of stations increases, the advantage of IEEE 802.11ax in terms of the access delay also increases.

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“…In [13] a new method to use OFDMA over the UL is suggested, where MAC Protocol Data Units (MPDU) from the stations are of different lenghs. In [14][15][16][17]…”

Section: Previous Workmentioning

confidence: 99%

Scheduling Strategies and Throughput Optimization for the Uplink for IEEE 802.11ax and IEEE 802.11ac Based Networks

Sharon¹,

Alpert²

2017

WSN

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“…Moreover, it further improves OFDM robustness to fading and interference. [10] There are certain disadvantages of OFDMA compared with OFDM. The most challenging problem is its higher sensitivity to frequency offsets and phase noise.…”

Section: Orthogonal Frequency-division Multiple Access [7]mentioning

confidence: 99%

“…Researchers are working hard to solve these problems so that 802.11ax could achieve better performance. [10] 6.3. MAC-layer Enhancements 6.3.1.…”

Section: Orthogonal Frequency-division Multiple Access [7]mentioning

confidence: 99%

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A Survey of IEEE 802.11 Protocols: Comparison and Prospective

Chen¹

2017

Proceedings of the 2017 5th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 20

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Abstract. Since the base version of IEEE 802.11 released in 1997, wireless local area network (WLAN) has been developing rapidly, and it has gone through many versions and amendments. The 802.11 protocol is now very sophisticated through 20 years of modification. Therefore, it is very hard to understand all improvements, which confuses researchers sometimes, making it not easy to discover the trend of development. This paper tries to summarize the key technologies that pushed WLAN forward among all important amendments, and then lists the latest research focus for the next generation of 802.11 family. The paper would provide assist researchers to find their field of interest.

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“…Specifically, to address high collision rates in dense scenarios, different techniques have been developed to achieve collision-free schedules or reduce collisions by choosing optimal CW values. In particular, using CSMA Enhanced Collision Avoidance with Hysteresis and Fair Share (CSMA/ECA Hys+FS ) [1]- [3], upon a successful transmission, a station chooses the 'expected value' of the Contention Window (CW) in which it just transmitted as its next backoff value (termed deterministic backoff). This will gradually create a collision-free schedule in single traffic scenarios but is unable to achieve collision-free schedule in traffic differentiation.…”

Section: Introductionmentioning

confidence: 99%

Traffic Differentiation in Dense WLANs with CSMA/ECA-DR MAC Protocol

Salehi

Shen

et al. 2018

2018 IEEE 88th Vehicular Technology Conference (VTC-Fall)

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In today's WLANs, scheduling of packet transmissions solely relies on the collision and success a station may experience. To better support traffic differentiation in dense WLANs, in this paper, we propose a distributed reservation mechanism for the Carrier Sense Multiple Access Extended Collision Avoidance (CSMA/ECA) MAC protocol, termed CSMA/ECA-DR, based on which stations can collaboratively achieve higher network performance. In addition, proper Contention Window (CW) will be chosen based on the instantaneously estimated number of active contenders in the network. Simulation results from dense scenarios with traffic differentiation demonstrate that CSMA/ECA-DR can greatly improve the efficiency of WLANs for traffic differentiation even with large numbers of contenders.

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Future evolution of CSMA protocols for the IEEE 802.11 standard

Cited by 26 publications

References 21 publications

Scheduling Strategies and Throughput Optimization for the Uplink for IEEE 802.11ax and IEEE 802.11ac Based Networks

Scheduling Strategies and Throughput Optimization for the Uplink for IEEE 802.11ax and IEEE 802.11ac Based Networks

A Survey of IEEE 802.11 Protocols: Comparison and Prospective

Traffic Differentiation in Dense WLANs with CSMA/ECA-DR MAC Protocol

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