Graduate School and Research Center In communication systems

Seminar: CSI Sharing Strategies in Wireless Networks

Paul De Kerret - PhD Student, Mobile Communications department

Communication systems

Date: November 8, 2012

Over the last couple of years, multiple-antenna based transmitter (TX) cooperation has been shown to be an important tool in controlling, avoiding or rejecting interference resulting from aggressive spectral reuse. In this talk, we highlight the price paid in the form of exchanging channel state information (CSI) between the TXs in most collaborative methods and how to circumvent this problem so as to make TX cooperation both more practical and scalable for future dense networks. We address the problem of ?Who needs to know what? when it comes to CSI, in scenarios encompassing interference channels without user message sharing as well as network MIMO with message sharing. Specifically, we show that adequate CSI dissemination strategies can substantially alleviate some of the overhead related to multiple-antenna cooperation and make TX cooperation both more scalable and practical.

CSI Sharing Strategies in Wireless Networks