Optimized Data Sharing in Multicell MIMO With Finite Backhaul Capacity

This paper addresses cooperation in a multicell environment where base stations (BSs) wish to jointly serve multiple users, under a constrained-capacity backhaul. We point out that for finite backhaul capacity a tradeoff between sharing user data, which allows for full MIMO cooperation, and not doing so, which reduces the setup to an interference channel but also requires less overhead, emerges. We optimize this tradeoff by formulating a rate splitting approach in which non-shared data (private to each transmitter) and shared data are superimposed. We derive the corresponding achievable rate region and obtain the optimal beamforming design for both shared and private symbols. We illustrate how the capacity of the backhaul determines how much of the user data is worth sharing across multiple BSs.

• Publication year

  2011

• Venue

  IEEE Transactions on Signal Processing

• Publication date

  2011-01-13

• Fields of study

  Mathematics, Computer Science, Engineering

• Identifiers
  DOI 10.1109/TSP.2011.2165949arXiv 1101.2721
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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