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Sociedade Brasileira de Telecomunicações

Application of Dynamic Clustering into CoMP Systems

In the last few years, advanced multi-antenna systems attracted a lot of interest as a means to improve the spectral efficiency of conventional cellular networks. This is the case of Coordinated Multi-Point (CoMP) systems in the context of 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE). However, the large amount of signaling required to achieve a full coordinated transmission is somewhat worrying. Performing the coordination within clusters of Transmission Points (TPs) rather than within the whole set of TPs can be an alternative to lighten the signaling and processing required. In this work, we introduce the Clustering-based Assignment Algorithm (CbAA) to cluster dynamically the TPs for transmitting coherently to multiple selected User Equipments (UEs). In fact, this approach will result in some loss of spectral efficiency, however, depending on the application requirements, the signaling shrinkage is so significant as to justify its use.

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