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Fundamentals of LTE by Rias Muhamed, Jeffrey G. Andrews, Jun Zhang, Arunabha Ghosh

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Chapter 9. Physical Layer Procedures and Scheduling

In previous chapters, we have described the hierarchical channel structure, the physical radio resource structure, and transport channel processing of the LTE radio interface. In this chapter, we specify the physical layer procedures that provide crucial services to higher layers. Dynamic channel-dependent scheduling and MIMO transmission, including open-loop (OL) and closed-loop (CL) MIMO modes, are two key features of LTE that provide high-spectrum efficiency, both of which require specific feedback support and signaling. Channel Quality Indicator (CQI) feedback and channel sounding provide channel quality information (signal to noise ratio) for downlink and uplink, respectively. The Rank ...

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