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Open AccessFeature PaperArticle

Scheduling for Multi-User Multi-Input Multi-Output Wireless Networks with Priorities and Deadlines

Faculty of Engineering, Bar-Ilan University, Ramat Gan 5290002, Israel
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Future Internet 2019, 11(8), 172; https://doi.org/10.3390/fi11080172
Received: 25 June 2019 / Revised: 25 July 2019 / Accepted: 26 July 2019 / Published: 5 August 2019
(This article belongs to the Special Issue Signal Processing for Next Generation Wireless Networks)
The spectral efficiency of wireless networks can be significantly improved by exploiting spatial multiplexing techniques known as multi-user MIMO. These techniques enable the allocation of multiple users to the same time-frequency block, thus reducing the interference between users. There is ample evidence that user groupings can have a significant impact on the performance of spatial multiplexing. The situation is even more complex when the data packets have priority and deadlines for delivery. Hence, combining packet queue management and beamforming would considerably enhance the overall system performance. In this paper, we propose a combination of beamforming and scheduling to improve the overall performance of multi-user MIMO systems in realistic conditions where data packets have both priority and deadlines beyond which they become obsolete. This method dubbed Reward Per Second (RPS), combines advanced matrix factorization at the physical layer with recently-developed queue management techniques. We demonstrate the merits of the this technique compared to other state-of-the-art scheduling methods through simulations. View Full-Text
Keywords: scheduling; beamforming; WLAN; OFDM; resource allocation; EDF; priority; deadline; queuing; EDF; ZFBF scheduling; beamforming; WLAN; OFDM; resource allocation; EDF; priority; deadline; queuing; EDF; ZFBF
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Raviv, L.-O.; Leshem, A. Scheduling for Multi-User Multi-Input Multi-Output Wireless Networks with Priorities and Deadlines. Future Internet 2019, 11, 172.

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