TITLE:
Scheduling Strategies and Throughput Optimization for the Uplink for IEEE 802.11ax and IEEE 802.11ac Based Networks
AUTHORS:
Oran Sharon, Yaron Alpert
KEYWORDS:
IEEE 802.11ax, IEEE 802.11ac, Throughput; Single User, MU-MIMO, OFDMA
JOURNAL NAME:
Wireless Sensor Network,
Vol.9 No.8,
August
11,
2017
ABSTRACT: 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.