August 20, 2015

Long-term Application-Level Wireless Link Quality Prediction

  • Faucher D.
  • Grinshpun E.
  • Qi Liao
  • Sayeed Z.
  • Sharma S.

The knowledge of a future throughput value for a user equipment (UE) in Long Term Evolution (LTE) or any other transmission technology is very valuable. It can be used in rate control algorithms so that radio channel congestions may be avoided thus allowing for better quality of experience of the wireless user. Such control usually would happen at the application layer so that the control loops at different layers may work together and thus create a stable operating point. However, the metrics that are learned and predicted are available at the core of the radio link. In this paper we identify a suitable {em application-level} link quality metric (which we call $bits_U/prb$) for prediction, and analyze the performance of the predictions at differing Rayleigh velocities. We find that the prediction of the application-level link quality prediction can be 90 to 97 % accurate.

View Original Article

Recent Publications

January 01, 2018

Fair Dynamic Spectrum Management for QRD-Based Precoding with User Encoding Ordering in Downstream Transmission

In next generation DSL networks such as, employing discrete multi-tone transmission in high frequencies up to 212 MHz, the crosstalk among lines reaches very high levels. To precompensate the crosstalk in downstream transmission, QRD-based precoding has been proposed as a near-optimal dynamic spectrum management (DSM) technique. However, the performance ...

January 01, 2018

Practical Mitigation of Passive Intermodulation in Microstrip Circuits

This paper presents new experimental evidence and a novel practical approach for mitigation of passive intermodulation (PIM) in microstrip circuits fabricated on commercial printed circuit board laminates. The mechanisms of distributed PIM in microstrip circuits are reviewed and a phenomenology of PIM generation due to locally enhanced electromagnetic fields at ...

January 01, 2018

Efficient Cooperative HARQ for Multi-Source Multi-Relay Wireless Networks

In this paper, we compare the performance of three different cooperative Hybrid Automatic Repeat reQuest (HARQ) protocols for slow-fading half-duplex orthogonal multiple access multiple relay channel. Channel State Information (CSI) is available at the receiving side of each link only. Time Division Multiplexing is assumed, where each orthogonal transmission occurs ...