LTE — Long Term Evolution

Moving 4G EPC to the Cloud

CUPS — Control and User Plane Separation

Facilitating 4G EPC…

Phased array antennas

…and how they relate to droplets in a pond

LTE to 3G circuit switched fallback — CSFB

Ever wondered why your phone falls back from LTE to 3G when making a voice call. This…

LTE EPS Architecture Overview

Excellent video describing the Evolved Packet Core used in LTE networks. The video describes the roles played by the major LTE components:

• eNodeB
• MME
• S-GW
• P-GW

LTE MAC layer presentation

Get an overview of the LTE MAC layer from this presentation:

LTE PDCP layer presentation

The PDCP layer in LTE performs the following functions:

• Transfer of upper layer PDUs;
• Error correction through ARQ (only for AM data transfer)
• Concatenation, segmentation and reassembly of RLC SDUs (UM…

LTE RLC presentation

The Radio Link Control Layer in LTE provides a reliable message service over the unreliable radio link.

Get an overview of the LTE RLC layer from this presentation:

LTE Identifiers: GUTI, GUMMEI, IMSI, RNTI, TAI and more

LTE security: encryption and integrity protection presentation and call flow