Concepts Documentation

4G LTE and GSM 3G/2.5G network architecture, what are the Radio Access Network and Core Network components and how they work together.

Understand the basics of LTE and GSM: Mobility, Radio waves, Path loss, Coverage and Network planning. 

LTE concepts – information about Long Term Evolution (LTE), its architecture and components. It describes the role of the eNodeB in the network and key concepts such as: E-UTRAN, Uu, X2, S1, MME/S-GW and EPC.


GSM Concepts – This page will cover basic concepts related to a typical GSM network, its key components, and the role of YateBTS in such a network.
Furthermore, the following sections of this page will describe GSM elements such as: the UM interface, its logical channels, GPRS, protocols of Voice over IP and more.

YateUCN and YateHSS/HLR network diagram

Mobility – Mobility is a process that allows transferring the mobile service as the mobile station moves from one cell to another. Mobility in GSM networks has the purpose of monitoring subscribers and their location (in terms of the base station they are registered to), to enable them to receive voice calls, SMSs or data services.

image explaining Handover in a LTE network based on YateUCN

Radio Propagation Concepts – What is transmit power (Tx) and receive power (Rx), what the key factors that influence the radio signal propagation – Path loss, what causes the interference, what is multipath propagation and propagation delay.

Network Planning – There are standard models used depending on general characteristics of the designated network area, or if need be, network planners can design their own propagation models. Using standard propagation models leads to lowering costs and saving time, yet they are also less accurate then the personalized propagation models.

Path loss