Uplink CoMP under a Constrained Backhaul and Imperfect Channel Knowledge

TL;DR

This paper analyzes uplink CoMP in next-generation wireless systems, focusing on the challenges of limited backhaul capacity and imperfect channel knowledge, and evaluates theoretical and practical approaches to address these issues.

Contribution

It introduces a new framework that combines theoretical uplink CoMP concepts with practical algorithms, providing insights into their viability under real-world constraints.

Findings

Theoretical uplink CoMP schemes can mitigate interference effectively.

Practical algorithms show robustness despite backhaul and channel imperfections.

The framework helps identify conditions for successful CoMP deployment.

Abstract

Coordinated Multi-Point (CoMP) is known to be a key technology for next generation mobile communications systems, as it allows to overcome the burden of inter-cell interference. Especially in the uplink, it is likely that interference exploitation schemes will be used in the near future, as they can be used with legacy terminals and require no or little changes in standardization. Major drawbacks, however, are the extent of additional backhaul infrastructure needed, and the sensitivity to imperfect channel knowledge. This paper jointly addresses both issues in a new framework incorporating a multitude of proposed theoretical uplink CoMP concepts, which are then put into perspective with practical CoMP algorithms. This comprehensive analysis provides new insight into the potential usage of uplink CoMP in next generation wireless communications systems.