August 2018
Intermediate to advanced
480 pages
20h 5m
English
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5Evaluation of LTE‐Advanced Features
5.1 Introduction to LTE‐Advanced Features
The standardization in 3GPP Release 8 defines the first specifications of LTE. The Evolved Packet System (EPS) is defined, mandating the key features and components of both the radio access network (E‐UTRAN) and the core network (Evolved Packet Core, EPC). Orthogonal Frequency Division Multiplexing is defined as the air interface with the ability to support multi‐layer data streams using Multiple‐Input, Multiple‐Output (MIMO) antenna systems to increase spectral efficiency. LTE is defined as an all‐IP network topology differentiated over the legacy circuit switch (CS) domain. However, Release 8 specification makes use of the CS domain to maintain compatibility with 2G and 3G systems by utilizing the voice call Circuit‐Switch Fallback (CSFB) technique for any of those systems. Other significant aspects defined in this initial 3GPP release are Self‐Organizing Networks (SONs) and Home Base Stations (home eNodeBs), aiming to revolutionize heterogeneous networks. Moreover, Release 8 provides techniques for smartphone battery saving, known as Connected‐mode Discontinuous Reception (C‐DRX).
LTE Release 9 provides improvements to Release 8 standards, most notably enabling improved network throughput by refining SONs and improving eNodeB (eNB) mobility 1]. Additional MIMO flexibility is introduced with multi‐layer beamforming. Furthermore, CSFB improvements are introduced to reduce voice call setup time delays. ...
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