Ozan, Waseem;
Darwazeh, Izzat;
Jamieson, Kyle;
(2022)
Partial OFDM Symbol Recovery to Improve Interfering Wireless Networks Operation in Collision Environments.
IEEE/ACM Transactions on Networking
10.1109/TNET.2022.3202857.
(In press).
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Abstract
The uplink data rate region for interfering transmissions in wireless networks has been characterised and proven, yet its underlying model assumes a complete temporal overlap. Practical unplanned networks, however, adopt packetized transmissions and eschew tight inter-network coordination, resulting in packet collisions that often partially overlap, but rarely ever completely overlap. In this work, we report a new design called (), that specifically targets the parts of data symbols that experience no interference during a packet collision. bootstraps a successive interference cancellation (SIC) like decoder from these strong signals, thus improving performance over techniques oblivious to such partial packet overlaps. We have implemented on the WARP software-defined radio platform and in trace-based simulation. Our performance evaluation presents experimental results from this implementation operating in a 12node software network testbed, spread over two rooms in a nonlineofsight indoor office environment. Experimental results confirm that our proposal decoder is capable of decoding up to 60 % of collided frames depending on the type of data and modulation used. This consistently leads to throughput enhancement over conventional WiFi under different scenarios and for the various data types tested, namely downlink bulk TCP, downlink videoondemand, and uplink UDP.
| Type: | Article |
|---|---|
| Title: | Partial OFDM Symbol Recovery to Improve Interfering Wireless Networks Operation in Collision Environments |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/TNET.2022.3202857 |
| Publisher version: | https://doi.org/10.1109/TNET.2022.3202857 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Technology, Computer Science, Hardware & Architecture, Computer Science, Theory & Methods, Engineering, Electrical & Electronic, Telecommunications, Computer Science, Engineering, Partial symbol recovery, wireless communications, 802.11, OFDM, collision environments, hidden terminals, interference cancellation, SEARCH |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10156661 |
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