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.
References
[1]
IEEE (2016) IEEE Std. 802.11TM-2016, IEEE Standard for Information Technology—Telecommunications and Information Exchange between Systems—Local and Metropolitan Area Networks—Specific Requirements. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications, IEEE, New York.
[2]
IEEE (2016) IEEE P802.11axTM/D1.2, IEEE Draft Standard for Information Technology—Telecommunications and Information Exchange between Systems—Local and Metropolitan Area Networks—Specific Requirements. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specific Requirements. IEEE, New York.
[3]
IEEE (2013) IEEE Std. 802.11acTM-2013, IEEE Standard for Information Technology—Telecommunications and Information Exchange between Systems—Local and Metropolitan Area Networks—Specific Requirements. Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specific Requirements. Amendment 4: Enhancements for Very High Throughput for Operation in Bands below 6 GHz, IEEE, New York.
[4]
Perahia, E. and Stacey, R. (2013) Next Generation Wireless LANs: 802.11n and 802.11ac. 2nd Edition, Cambridge Press, Cambridge.
https://doi.org/10.1017/CBO9781139061407
[5]
Khorov, E., Kiryanov, A. and Lyakhov, A. (2015) IEEE 802. 11ax: How to Build High Efficiency WLANs. 2015 International Conference on Engineering and Telecommunication (Ent), Moscow, 18-19 November 2015, 14-19.
https://doi.org/10.1109/EnT.2015.23
[6]
Afaqui, M.S., Villegas, E.G. and Aguilera, E.L. (2016) IEEE 802.11ax: Challenges and Requirements for Future High Efficiency WiFi. IEEE Wireless Communications, 99, 2-9.
[7]
Deng, D.J., Chen, K.C. and Cheng, R.S. (2014) IEEE 802.11ax: Next Generation Wireless Local Area Networks. 2014 10th International Conference on Heterogeneous Networking for Quality, Security and Robustness (QSHINE), Rhodes, 18-20 August 2014, 77-82. https://doi.org/10.1109/QSHINE.2014.6928663
Karmakar, R., Chattopadhyay, S. and Chakraborty, S. (2017) Impact of IEEE 802.11n/ac PHY/MAC High Throughput Enhancement over Transport/Application Layer Protocols—A Survey. IEEE Communication Surveys and Tutorials.
[10]
Qu, Q., Li, B., Yang, M. and Yan, Z. (2015) An OFDMA Based Concurrent Multiuser MAC for Upcoming IEEE 802.11ax. IEEE Wireless Communication and Networking Conference Workshops (WCNCW), 2015, 136-141.
https://doi.org/10.1109/WCNCW.2015.7122543
[11]
Lin, W., Li, B., Yang, M., Qn, Q., Yan, Z., Zuo, X. and Yang, B. (2016) Integrated Link-System Level Simulation Platform for the Next Generation WLAN-IEEE 802.11ax. 2016 IEEE Global Communications Conference (Globecom), 1-7.
[12]
Lee, J., Deng, D.J. and Chen, K.C. (2014) OFDMA-Based Hybrid Channel Access for IEEE 802.11ax WLAN. Unpublished.
[13]
Karaca, M., Bastani, S., Priyanto, B.E., Safavi, M. and Landfeldt, B. (2016) Resource Management for OFDMA Based Next Generation 802.11ax WLANs. 2016 9th IFIP Conference on Wireless and Mobile Networking (WMNC), 57-64.
[14]
Jones, V. and Sampath, H. (2015) Emerging Technologies for WLAN. IEEE Communication Magazine, 5, 141-149. https://doi.org/10.1109/MCOM.2015.7060496
[15]
Sanabria-Russo, L., Faridi, A., Bellalta, B., Barcelo, J. and Oliver, M. (2013) Future Evolution of CSMA Protocols for the IEEE 802.11 Standard. ICC 2013: IEEE International Conference on Communication, 1274-1279.
[16]
Sanabria-Russo, L., Barcelo, J., Faridi, A. and Bellalta, B. (2014) WLANs Throughput Improvement with CSMA/ECA. 2014 IEEE Conference on Computer Communication Workshops (INFOCOM WKSHPS), Toronto, 27 April-2 May 2014, 125- 126. https://doi.org/10.1109/INFCOMW.2014.6849187
[17]
He, Y., Yuan, R., Sun, J. and Gong, W. (2009) Semi-Random Backoff: Towards Resource Reservation for Channel Access in Wireless LANs. 2009 IEEE International Conference on Network Protocols (ICNP), Princeton, 13-16 October 2009, 21-30.
https://doi.org/10.1109/ICNP.2009.5339700
[18]
Khorov, E., Loginov, V. and Lyakhov, A. (2016) Several EDCA Parameters Sets for Improving Channel Access in IEEE 802.11ax Networks. 2016 International Symposium on Wireless Communication Systems (ISWCS), Poznan, 20-23 September 2016, 419-423. https://doi.org/10.1109/ISWCS.2016.7600940
[19]
Sharon, O. and Alpert, Y. (2014) MAC Level Throughput Comparison: 802.11ac vs. 802.11n. Physical Communication, 12, 33-49.
https://doi.org/10.1016/j.phycom.2014.01.007
[20]
Lemmon, J. (2002) Wireless Link Statistical Bit Error Rate Model. Technical Report 02-934, US Department of Commerce, Washington DC.
[21]
Chatzimisios, P., Boucouvalas, A.C. and Vitas, V. (2003) IEEE 802.11 Packet Delay—A Finite Retry Limit Analysis. 2003 IEEE Global Communications Conference (Globecom), San Francisco, 1-5 December 2003, 950-954.
