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User Prioritization in Wireless Using Spectrum Pooling and Interference Alignment

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  • Visitor Seminars
When Dec 27, 2012
from 02:00 PM to 04:00 PM
Where ENGR. IV Bldg., Maxwell Rm. 57-124
Contact Name
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Ezio Biglieri

University of Pisa-Princeton University



A standard paradigm for the allocation of wireless resources in communication demands symmetry, whereby all users are assumed to be on equal footing and hence get equal shares of communication capabilities. However, there are situations in which “prime users” should be given higher priority, as for example in the transmission of emergency messages.   In this talk I examine two prioritization policies that can be implemented at the physical layer.  

The first transmission scheme is based on spectrum pooling and on the assignment of higher-SNR channels to higher-priority users. The second one, called Interference Priority, is based on a simplified version of Interference Alignment, whereby the interference is aligned only at the priority receiver. With both schemes, I evaluate the performance of the prioritized transmission, compare it with that of unprioritized (or “symmetric”) schemes, and discuss the impact of prioritized use of resources on unprioritized users.


Ezio Biglieri received his doctorate degree in Electrical Engineering from Politecnico di Torino (Italy) in 1967.  He was a professor at Universita di Napoli (Italy), Politecnico di Torino, and UCLA. Currently he is an Adjunct Professor at UCLA, and Universitat Pompeu Fabra, Barcelona, Spain.  He is a Life Fellow of IEEE. In 1992 he received the IEE (UK) Benefactors Premium for a paper on trellis-coded modulation. In 2000 he received the IEEE Third-Millennium Medal for outstanding contributions to the Information Theory area of technology, and the IEEE Donald G. Fink Prize Paper Award. In 2001 he received the IEEE Communications Society Edwin Howard Armstrong Achievement Award. He received twice (in 2004 and 2012) the Journal of Communications and Networks Best Paper Award. In 2012 he received IEEE-Information Theory Society’s Aaron D. Wyner Distinguished Service Award for outstanding leadership in, and long-standing exceptional service.

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