4G LTE (Long Term Evolution)

LTE Basics

LTE Network Architecture What is TA in LTE? Timing Advance Procedure Zadoff-Chu Sequences Receive Diversity Gain LTE FDD Throughput Calculations System Information Blocks (SIBs) LTE MAC Scheduler PDCCH and DMRS Time-Frequency Structures for PDCCH Paging Procedure. What is S13 Interface in LTE Networks? LTE Tracking Area Code and Update? PLMN and Cell Selection in LTE What is LTE Cell Searching? LTE Frame Structure. What is Multi-Radio Dual Connectivity (MR-DC) in 5G? What is Control Plane and User Plane in LTE? Protocol Architecture. LTE Roaming Architecture? What is E-UTRAN? Access Network of LTE What is CINR (Carrier to Interference plus Noise Ratio)? What are Antenna Parameters in LTE? What is MAC Scheduler in LTE? Technical Depth PDSCH in LTE? Spectrum Planning Cell Edge Data Rates in LTE Networks

LTE Air Interface

What is LTE Air Interface? Best Technical Guide Keyword 25 Access Technique (OFDMA) What is FDD Frame Structure? LTE Cyclic Prefix. SC-FDMA. LTE Frequency Reuse Keyword 25 Keyword 25

LTE Scheduler, QoS, Protocol Stack

What is QoS Class Identifier (QCIs) for LTE? PDCCH Optimization Protocol Stack & L3-Messages LTE scheduler and C-DRX Keyword 25 Keyword 25 Keyword 25

LTE Signalling & Messages

LTE Cell Searching PLMN and Cell Selection. Attach Procedure Signalling. LTE X2 Handover. S1 Handover in LTE. LTE Handover Call Flow Diagram. S1 Handover in LTE – Inter-eNodeB Handover over the S1 Interface Signaling. LTE X2 Handover – Inter-eNodeB Handover over X2 Signaling LTE Attach Procedure Signalling.

Idle Mode Behavior

What is PLMN (Public Land Mobile Network)? PLMN Selection What are LTE SIBs? What is PCI Planning and Design in LTE? LTE S-Criteria Control Channel (Adv. Mapping) Cell Reselection Criteria LTE Reselection Parameters LTE Cell Selection Parameters Tracking Area Update Paging Procedure of LTE. RACH (RSI Planning) Measurement (RSRP / RSRQ / SINR) What is RSRP? What is RSRQ? What is SINR in LTE? What is RSSI in LTE? What is CQI in LTE? What is PCI in LTE?

Features

MLB Feature NR Event 5G MIMO Coverage Throughput Packet Loss External Interference

Cluster Optimization

LTE Network Tunning SINR Optimization Handover Failure Optimization Ping-Pong Handover Optimization Call Drop Analysis RRC Connection Establishment Failures E-RAB Connection Establishment Failures LTE Throughput Analysis What is Downtilt of Antenna?

LTE Call Flow & Diagrams

LTE Handover Call Flow Diagram

LTE Parameter Optimization

RRC counters, failure causes and solution Load Control Parameters Handover Failure Counters eRAB Drop Counters and Solution eRAB Failure Counters and Solution Throughput Performance Optimization Parameter 5G NR Accessibility KPIs PRACH Parameter Optimization LTE Handover Optimization (Common Problems and Cases) LTE Handover Delay Optimization What is LTE Handover Latency? How to Optimize? Random Access Procedure in LTE with Parameter Optimization LTE Handover Parameters Huawei CQI Parameter Improvement. CSFB Failure Causes Scenarios and Counters LTE Cell Selection Parameters. LTE Reselection Parameters. Keyword 25

LTE KPIs

LTE Accessibility KPI and Detail Optimization. LTE Accessibility KPI and Counters Mapping. LTE Retainability KPI Optimization and Counter Mapping LTE Availability KPIs LTE Utilization KPIs Service Integrity KPIs Latency in LTE Networks and Latency KPIs Traffic KPIs in LTE

LTE Features

Mobility Load Balance Features Carrier Aggregation Concept CSFB Features Carrier Aggregation (Configuration & Anchoring) Handover Strategy (Priority & Redirection based) MIMO Transmission Mode & Cross MIMO

4G IEs

SINR RSRQ RSRP What is CQI in LTE? What is RSSI in LTE? What is PCI in LTE?

Network Elements

Mobility Management Entity (MME) Packet Data Network Gateway (PDN-GW) Serving Gateway (S-GW) What is eNodeB?

Radio Interface Basics

OFDM Principles and Modulation Multiple Access in OFDM – OFDMA What is Resource Block in LTE? OFDM Scheduling on LTE DL Downlink Slot Structure Uplink Slot Structure SC-FDMA Principles and Modulation Scheduling on LTE UL What is LTE Link Adaptation? Channel Mapping and Multiplexing Transport Channels in LTE What is Uplink Throughput in LTE?

Area and Subscriber Identities

IMSI LMSI, TMSI, P-TMSI, M-TMSI, and S-TMSI IMEI What is GUTI in LTE? What is GUMMEI in LTE? What is Access Point Name (APN) in LTE Networks?

LTE DT & Optimization Tools

NETMAX and ZXPOX CNP ZXPOS CNA ZXPOS CNT

LTE Interview Questions

What information is carried on the PDCCH? What are the control channel differences between NR and LTE? Difference among 2G/3G/4G/5G Sites. RF Optimization (RAN) Interview Questions & Answers Why 15 kHz Subcarrier Spacing is Used for 4G LTE? How to Calculate LTE Throughput?

LoRa Technology

Overview of LoRa Technology LoRa Communication Protocol LoRa Modulation

Others

LTE and 3G KPI Improvement Report

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