Relaying and Base Station Cooperation: a Comparative Survey for Future Cellular Networks


Raphael Rolny, Marc Kuhn, Armin Wittneben, and Thomas Zasowski


Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA, Nov. 2012.

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We develop a unified framework to investigate the performance of future cellular networks with relays and/or coordinated multipoint (CoMP) transmission. Based on this framework, we study the benefits of CoMP and relaying in a realistic setup. We consider imperfect channel knowledge, different power levels, and simple (thus practically relevant) cooperation schemes with different complexity: non-cooperative reference, decode-andforward relaying with relay selection, base station cooperation with block zero-forcing (coherent joint transmission), and a combination of relaying and CoMP. Based on computer simulations, we compare the different schemes with respect to performance, robustness, complexity, and required transmit power.

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