EUTRAN Releases
As the rest of the 3GPP standard parts E-UTRA is structured in releases.
- Release 8, frozen in 2008, specified the first LTE standard
- Release 9, frozen in 2009, included some additions to the physical layer like dual layer (MIMO) beamforming transmission or positioning support
- Release 10, frozen in 2011, introduces to the standard several LTE Advanced features like carrier aggregation, uplink SU-MIMO or relays, aiming to a considerable L1 peak data rate increase.
All LTE releases have been designed so far keeping backward compatibility in mind. That is, a release 8 compliant terminal will work in a release 10 network, while release 10 terminals would be able to use its extra functionality.
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