System-level performance of LTE-Advanced with joint transmission and dynamic point selection schemes

• Published in: EURASIP journal on advances in signal processing Vol. 2012; no. 1; pp. 1 - 18
• Main Authors: Määttänen, Helka-Liina, Hämäläinen, Kari, Venäläinen, Juha, Schober, Karol, Enescu, Mihai, Valkama, Mikko
• Format: Journal Article
• Language: English
• Published: Cham Springer International Publishing 27.11.2012
• Subjects: Advanced Distributed Wireless Communication Techniques Theory and Practice; Design engineering; Dynamic tests; Dynamical systems; Dynamics; Engineering; Feedback; Gain; Quantum Information Technology; Signal,Image and Speech Processing; Spintronics; Support interference; Switching; User Equipment; CoMP Scheme; Channel Quality Indication; Phase Combiner; Physical Resource Block
• ISSN: 1687-6180; 1687-6172; 1687-6180
• DOI: 10.1186/1687-6180-2012-247

In this article, we present a practical coordinated multipoint (CoMP) system for LTE-Advanced. In this CoMP system, cooperation is enabled for cell-edge users via dynamic switching between the normal single-cell operation and CoMP. We first formulate a general CoMP system model of several CoMP schemes. We then investigate a practical finite-rate feedback design that simultaneously supports interference coordination, joint transmission (JT), and dynamic point selection (DPS) with a varying number of cooperating transmission points while operating a single-cell transmission as a fallback mode. We provide both link-level and system-level results for the evaluation of different feedback options for general CoMP operation. The results show that there are substantial performance gains in cell-edge throughputs for both JT and DPS CoMP over the baseline Release 10 LTE-Advanced with practical feedback options. We also show that CoMP can enable improved mobility management in real networks.