Loading...
Please wait, while we are loading the content...
Similar Documents
Next Generation Wi-Fi : IEEE 802 . 11 ax 1024-QAM and DL OFDMA
| Content Provider | Semantic Scholar |
|---|---|
| Author | Weller, Daan Dijksman, Raoul Bloem, Jan-Willem Van |
| Copyright Year | 2019 |
| Abstract | IEEE 802.11ax is the new standard introduced by the IEEE that focuses on improving efficiency. Among others, two of the newly introduced features are 1024 Quadrature Amplitude Modulation (QAM) and Orthogonal Frequency-Division Multiple Access (OFDMA). In this paper, the expected throughput gain of 25% with the new 1024-QAM and expected latency reduction with downlink (DL) OFDMA are examined with state of the art reference boards of two different Wi-Fi chipset manufacturers. Using three Samsung S10 mobile phones as clients, experiments were performed to measure the increase in throughput and decrease in latency. The 25% increase in throughput with 1024-QAM was achieved, albeit with a maximum range of operation of approximately 2 meters at MCS 11. We observed a very low percentage of packets transmitted using DL OFDMA in the traffic profiles used. We conclude that the introduction of DL OFDMA does not have a significant impact on the latency with the test scenarios covered. The performance of DL OFDMA is heavily dependent on the ability of the access point to properly schedule DL OFDMA transmissions. The number of clients, packet size, and buffer size play an essential role in the scheduling process. Based on our measurements the benefit of DL OFDMA is expected to be limited unless the number of clients is substantially higher than the three clients used, as would be the case in a stadium, train, or mall. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://work.delaat.net/rp/2018-2019/p22/report.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
