Price is for 5 days
Duration
5 days
Objectives
Upon completion of this course, the participant will:
Understand the air interface structure of LTE
Understand the fundamental air interface procedures of LTE
Understand how interworking functionality allows mobility between LTE, UTRAN and GERAN
Understand the operations of idle and connected mode
Understand the basic signalling procedures such as network attach, default
bearer setup, mobility and so forth
Understand how VoLTE/IMS fits with LTE and its prime role to provide voice services in LTE networks
Being able to define, measure suitable VoLTE KPIs for accessibility and retainability performance
Understand the different factors which could affect LTE call set-up and call drop performance
Identify the reasons behind abnormal signalling behaviour. Be able to use signalling information for network troubleshooting and optimisation
Understand the methodology for coverage and interference analysis
Explain the reasons for troubleshooting PS throughput
Sketch EPC architecture and determine various connectivity and related
protocols
Sketch the IMS network design and configuration
Suitable for
System engineers, network designers, cell planners and optimisation engineers interested in the basic system functionality and design of LTE, in the architecture, signalling procedures of EPC-LTE, troubleshooting and optimisation of LTE networks using TEMS
Prerequisites
GSM and UMTS air interface is recommended
Contents
1. LTE network architecture
LTE Network Architecture
E-UTRAN radio interface protocol stack
EPC interfaces
Bearer service architecture
Bearer level QoS
UE category types
2. LTE air interface principles
LTE Physical Layer
Subframe structure & CP length
Physical Resource Blocks
Downlink & Uplink Physical Channels
Reference signals
Multiple Antenna Systems
LTE Transmission Modes
3. LTE basic operations & procedures
LTE Initial Access
LTE Initial attach process involving EPC
Cell search flow diagram
Random Access (RA) Procedure
RRC Connection establishment
EPS bearer
LTE RRC States
CQI Adaptation
4. Voice services in LTE: VoLTE, CSFB & SRVCC
IMS network architecture
IMS & LTE-EPC
IMS initial registration
IMS session establishment
The reason for CSFB
CSFB Architecture
CSFB Mobility Method
CSFB Voice Call Signalling
Single Radio Voice Call Continuity (SRVCC)
Comparison of IMS, SRVCC & CSFB
SMS over SGs
Mobile SMS signalling
5. Radio coverage
Preparations for RF optimisation
Physical Channel ID Review
Serving cell PCI verification
Uplink Interference
Radio optimisation actions
LTE RF optimisation objectives
RSRP, RSRQ & SINR definitions
Relationship between SINR and Throughput
Radio KPIs
Resolving poor coverage problems
Dominance improvement actions
Overshooting cell
Radio optimisation actions trade-off
Uplink/downlink power path imbalance
Resolving SINR (interference) problems
Neighbouring lists & ANR functionality
6. Accessibility
Idle mode (cell selection and reselection) procedures
LTE initial access related procedures
VoLTE KPI definitions for accessibility
Troubleshooting
7. Retainability
When radio link is out-of-synch?
RRC Connection Reestablishment
Radio link failure at eNB
LTE handover principles
event A3: Best-cell-triggered handover
Optimisation rules for A3 parameters
event A2: Coverage-triggered handover
X2-based Inter E-NodeB Handover
ANR functionality & mobility
Interworking network architecture
Idle mode LTE-UMTS-GSM selection/reselection
Inter-RAT Handover
VoLTE KPI definitions for retainability
Troubleshooting
8. Integrity
LTE User Plane Protocol Stack
Downlink Throughput Troubleshooting
CQI investigation
MIMO usage
RF conditions
Backhaul bottleneck
Uplink Throughput Troubleshooting
Power headroom analysis
Troubleshooting
*Several hands-on exercises based on TEMS Discovery will be presented covering all discussed LTE technology topics.
