Since its introduction, LTE is continuously worked on in terms of improvements. 3GPP groups added technology components into so called releases. Initial enhancements were included in 3GPP Release 9, followed by more significant improvements in 3GPP Release 10, also known as LTE-Advanced. 

LTE-Advanced also remains the correct description for specifications defined from Release 10 onwards, including 3GPP Release 12. This Rohde & Schwarz white paper summarizes improvements specified in 3GPP Release 11.

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