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Real-time implementation of cross-layer optimization. Multi-antenna high speed uplink packet access

: Haustein, T.; Wiczanowski, M.; Boche, H.; Schulz, E.


IEEE Signal Processing Society:
IEEE International Conference on Acoustics, Speech, and Signal Processing 2005. Proceedings. Vol.3: Audio and electroacoustics. Signal processing for communications : May 18 - 23, 2005, Pennsylvania Convention Center/Marriott Hotel, Philadelphia, Pennsylvania, USA
Piscataway, NJ: IEEE Operations Center, 2005
ISBN: 0-7803-8874-7
International Conference on Acoustics, Speech, and Signal Processing (ICASSP) <2005, Philadelphia/Pa.>
Fraunhofer HHI ()
indoor radio; optimisation; packet radio networks; quality of service; radio access networks; scheduling

We present a multi-antenna real-time implementation of a cross-layer uplink scheduler based on a recently developed framework. We outline the theory behind the stability-optimal scheduler, which achieves the entire stability region of the multiple access channel. We discuss the trade-off between theoretical optimality and real-time operation under real-world constraints, which leads to the development of an efficient fair scheduler. Finally, we evaluate the performance of the fair scheduler in experimental measurements (on state-of-the-art hardware) in a typical office scenario, which shows an increase in spectral efficiency and the possibility to guarantee a certain link quality of service threshold.