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Information theory predicts huge performance gains in terms of spectrum efficiency by using cooperative transmission from multiple base stations. Cooperation eliminates inter-cell interference and it enables a higher channel rank. The isolated cell capacity is an upper bound for unlimited backbone capacity, infinite signal processing power and infinite channel feedback. The authors discuss a combined physical, Medium Access Control (MAC) and network layer approach targeting minimal implementation loss while relaxing assumptions. It is based on frequency-selective Channel Quality Identifier (CQI) reports to the serving station selecting the right user(s) on a given resource with best Signal to Interference and Noise Ratio (SINR).
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