Distributed and Centralized Architectures for Relay-Aided Cellular Systems

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Executive Summary

In this paper, the authors propose a two-step distributed scheduling algorithm for relay-assisted cellular networks where a given user can be either served by the base station or by a relay, in a opportunistic way. Such a distributed approach allows a reduced feedback signaling with respect to the centralized case, especially when a simple scalar feedback is not sufficient for estimating the channel quality. As a result of the reduced feedback signaling requirements the system becomes more scalable, as new relays can be deployed where required without need of a careful network planning. They study the effectiveness of the proposal by means of a multi-cell simulator.

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