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This paper exploits the use of location information of wireless terminals to improve the performance of a beamforming system and support multiple access. Based on a system providing real-time 3D coordinate information of all terminals in the environment, a novel feedback-free multi-user scheduler is proposed. It chooses a set of angularly separated wireless terminals for simultaneous transmission in order to reduce the impact of mutual interference on overall system performance. If additional feedback of signal-to-interference and noise ratio is available, a location-assisted multi-user scheduler is also suggested to further improve the overall system performance. Both multi-user schedulers are based on a rate-greedy approach. To improve the fairness in resource allocation without introducing additional feedback overhead, a modified proportional fair algorithm (PFA) based on location information can be applied to a beamforming OFDMA system. By scaling the window length of PFA, a range of trade-offs between fairness and rate can be achieved.
|Title of host publication||IEEE 72nd Vehicular Technology Conference Fall (VTC 2010-Fall), 2010|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|Pages||1 - 5|
|Number of pages||5|
|Publication status||Published - Sep 2010|
|Event||72nd Vehicular Technology Conference Fall (VTC 2010-Fall), 2010 - Ottawa, Canada|
Duration: 1 Sep 2010 → …
|Conference||72nd Vehicular Technology Conference Fall (VTC 2010-Fall), 2010|
|Period||1/09/10 → …|
Bibliographical noteRose publication type: Conference contribution
Sponsorship: The authors wish to thank all partners to the ViewNet project for their discussions and participation in this work.
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- location information
- multi-user Scheduling
Han, C., Webb, MW., Doufexi, A., & Beach, MA. (2010). Low-feedback multiple-access and scheduling via location and geometry information. In IEEE 72nd Vehicular Technology Conference Fall (VTC 2010-Fall), 2010 (pp. 1 - 5). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/VETECF.2010.5594100