What is LTE-Advanced Pro?
LTE-Advanced Pro (also marketed as 4.5G or pre-5G) is the designation for 3GPP Releases 13 and 14, representing the most advanced evolution of the LTE standard before 5G NR. It introduced features including FD-MIMO (up to 64 antenna ports), Licensed Assisted Access (LAA) for operation in unlicensed spectrum, LTE-WLAN Aggregation (LWA), Narrowband IoT (NB-IoT), enhanced Machine-Type Communications (eMTC/LTE-M), and Vehicle-to-Everything (V2X) sidelink communication.
How Does LTE-Advanced Pro Work?
LTE-Advanced Pro bridged the gap between LTE-Advanced and 5G NR by introducing many technologies that would become central to 5G. FD-MIMO enabled 3D beamforming with 2D antenna arrays. LAA used Listen-Before-Talk (LBT) protocols to operate in the 5 GHz unlicensed band while aggregating with licensed carriers. NB-IoT and eMTC provided purpose-built air interfaces for massive IoT with 10-year battery life and deep indoor coverage. D2D (Device-to-Device) communication laid the groundwork for V2X sidelink. CBRS/LSA introduced shared spectrum access frameworks. Dual Connectivity allowed UEs to simultaneously connect to macro and small cell layers.
Use Cases
Massive IoT deployment via NB-IoT and LTE-M, licensed and unlicensed spectrum aggregation, 4.5G capacity enhancement prior to 5G rollout, V2X communication for automotive safety, and enterprise small cell deployments.
3GPP / Standards Reference
3GPP TS 36.300 (Releases 13-14), 3GPP TS 36.355 (V2X), 3GPP TS 36.211 (FD-MIMO extensions)
Related Terms
LTE-A | FD-MIMO | IoT | V2X | 4G
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This glossary entry is part of the 5GWorldPro Complete 5G Glossary. To go deeper into 5G architecture and technology, explore our 5G Training courses.
