Field Guide · protocol

Also known as: LTE-Advanced, LTE-A, LTE Advanced Pro

LTE-Advanced (LTE-A) is the 3GPP Release 10 evolution of LTE that was the first version to satisfy the ITU’s IMT-Advanced definition of true 4G.1 It reaches gigabit-class peak rates chiefly through carrier aggregation — bonding several LTE carriers into one wider effective channel — combined with higher-order MIMO and coordinated transmission between cells.

CC1 20 MHzCC2 20 MHzCC3 20 MHz Band A (contiguous)Band B aggregated 60 MHz to one UE
Carrier aggregation bonds multiple LTE component carriers — even in different bands — into one wider pipe for a single handset.

Overview

Where baseline LTE topped out at a 20 MHz carrier, LTE-Advanced lets a handset receive and transmit on several component carriers at once, contiguous or scattered across bands, for up to 100 MHz of aggregate bandwidth in Release 10. It reuses the same OFDMA waveform and resource-block grid as LTE, so it is an enhancement layered onto existing networks rather than a new air interface.

Technical characteristics

Property Value
Carrier aggregation Up to 5 × 20 MHz component carriers (100 MHz)
Downlink MIMO Up to 8×8 spatial layers
Uplink MIMO Up to 4×4
CoMP Coordinated multipoint transmission/reception
Relay nodes Wireless backhaul relays for coverage infill
Heterogeneous networks Macro + small-cell interference coordination (eICIC)

Later Release 13/14 enhancements, marketed as LTE Advanced Pro or “gigabit LTE,” pushed aggregation to more carriers and added licensed-assisted access (LAA) into unlicensed spectrum.

History

3GPP completed Release 10 in 2011, with commercial LTE-Advanced networks appearing from about 2013.2 It served as the practical bridge to 5G NR: many features first proven in LTE-A — dense carrier aggregation, massive MIMO, and tight small-cell coordination — were carried forward into the 5G design.

Deployment

Nearly all mature LTE operators enabled carrier aggregation, so most “4G” service in the late 2010s was in practice LTE-Advanced. It remains a heavily used capacity and coverage layer, frequently aggregated together with 5G carriers in non-standalone deployments.

Decoding it with GopherTrunk

GopherTrunk does not decode LTE-Advanced. As with LTE, this is a licensed wideband cellular air interface far outside the scope of a narrowband land-mobile trunking scanner, and carrier aggregation only widens the required capture bandwidth. It is catalogued here to explain how 4G reached gigabit rates in the same spectral neighbourhood a scanner monitors.

Sources

  1. LTE Advanced — Wikipedia, for carrier aggregation, higher-order MIMO, and the IMT-Advanced qualification. ↩

  2. LTE-Advanced — 3GPP, for the Release 10 timeline and feature set. ↩

See also