Sevani, V and Saravanan, P and Anand, SVR and Kuri, J and Kumar, A (2022) Time-slicing high throughput wifi networks using centralized queueing and scheduling. In: WiNTECH 2022 - Proceedings of the 2022 16th ACM Workshop on Wireless Network Testbeds, Experimental evaluation and CHaracterization, Part of MobiCom 2022, 17 October 2022, Sydney, pp. 53-60.
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Abstract
We study fine grained (10s of ms) overlay time-slicing, and centralized queuing and scheduling, for the performance management of "high throughput"(HT) IEEE 802.11 standards, where cochannel interference reduces PHY rates and aggregation, causing poor performance. In overlay time-slicing, interference between AP-STA (Access Point and associated Station) links is eliminated by queuing downlink packets in a scheduler, between the wireline network and the APs, and releasing packets to a set of AP-STA links only in their time-slice. This can manage downlink and uplink FTP and HTTP transfers, and downlink packet voice traffic. We utilize a stochastic approximation based closed-loop mechanism that releases only as much data in a time-slice as can be "served,"so that the AP-STA links mapped to that time-slice are inactive at the end of their time-slice, thus, eliminating cochannel interference. Fine-grained overlay time-slicing is demonstrated on an experimental network with two cochannel AP-STA pairs, a setting that we see in our campus WiFi network. In our approach, even for small time-slices (20ms to 50ms), for downlink and uplink TCP bulk transfers, in spite of the scheduler working with partial information, the time-slice boundaries are respected, and performance is close to network utility optimal. Fine-grained time-slicing reduces HTTP access delay, prevents TCP connections over the wide area network from reacting to the path interruptions, and also permits slicing of applications such as interactive packet voice. © 2022 ACM.
| Item Type: | Conference Paper |
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| Publication: | WiNTECH 2022 - Proceedings of the 2022 16th ACM Workshop on Wireless Network Testbeds, Experimental evaluation and CHaracterization, Part of MobiCom 2022 |
| Publisher: | Association for Computing Machinery, Inc |
| Additional Information: | The copyright for this article belongs to the Authors. |
| Keywords: | Cochannel interference; IEEE Standards; Queueing networks; Queueing theory; Stochastic systems; Transmission control protocol; Wi-Fi; Wide area networks; Wireless local area networks (WLAN), Access points; Centralised; Downlink packets; Fine grained; High-throughput; Packet voice; Performance management; Time slice; Time slicing; Wi Fi networks, HTTP |
| Department/Centre: | Division of Electrical Sciences > Computer Science & Automation Division of Interdisciplinary Sciences > Supercomputer Education & Research Centre Others |
| Date Deposited: | 25 Jan 2023 06:37 |
| Last Modified: | 25 Jan 2023 06:37 |
| URI: | https://eprints.iisc.ac.in/id/eprint/79494 |
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