QoS and QoE of LTE and 5G Networks

Communication network powered by LTE and 5G networks

The increasing uptake of Internet of Things (IoT), Big data and cloud-based services introduces a new set of requirements for network performance. Furthermore, the evolution of mobile networks towards an all-IP 4G LTE, VoLTE and 5G introduces new challenges for traditional voice and data services. Given these developments, it is thus critical for operators to guarantee minimum levels of performance. Operators will need to understand and manage both quality and performance of the services to fulfill the technical quality of service (QoS) and the quality of experience (QoE).

QoE is directly related to QoS. Therefore, one can map the objective QoS measurements (e.g. delay, packet loss and jitter) to the user’s perception of QoE through an appropriate set of tools and processes. QoS is defined as the capability of the communication network to provide a service at an assured service level, while QoE depends on customer satisfaction in terms of usability, accessibility, and integrity of the service. QoE, however, is not limited to the technical performance of the network; there are also non-technical aspects which influence the users’ perception and satisfaction.

In an LTE network, QoS is implemented between UE and PDN Gateway and is applied to a set of bearers. VoLTE QoS covers all the QoS and QoE features in LTE and LTE-A to support VoLTE. One of the major challenges associated with VoLTE is defining the QoS features for the LTE RAN, EPC and IMS.

VoLTE QoS covers how LTE networks support end-to-end QoS for different IP-based services such as voice, video, multimedia messaging, and gaming. QoS in LTE Radio, EPC, LTE Backhaul and Core Network, Policy and Charging Control (PCC), EPS Bearers, policy, QCI for voice and video applications are covered. Voice over LTE will play a key part in determining a subscriber’s QoE on an LTE/EPC/IMS network.

  • Regulators and telecommunications personnel who require a strong knowledge of LTE, LTE-A, VoLTE, VoIP, IMS, 5G technologies and mechanisms
  • Personnel in charge of telecoms regulation and the configuration and monitoring of a 4G or 5G network 
  • Operations and maintenance personnel who are required to understand LTE and how 4G and 5G function
  • All regulators, engineers, technicians and managers working with LTE 4G, 5G, GSM, UMTS, Wi-Fi, LTE technology

At the end of the course, participants will learn and understand:

  • What is QoS (inward looking, network oriented) and QoE (outward looking, customer focused)
  • How to measure QoS and QoE in mobile networks
  • How QoS is based on technical and lower layer parameters in RF, signaling, and IP
  • How QoE often uses events on application layer or above
  • QoS parameters that allow users to efficiently spot technical problems and bottlenecks in the network
  • How QoE provides an end-to-end view and is often based on perceptual feedback given by a user
Instructor-Led Training
[Classroom: 3 days / LIVE Virtual*: 21 hours]
  • A minimum of 6 or more participants are required for a company-based LIVE Virtual course to commence
  • LIVE Virtual courses can be conducted for 5 hours or 7 hours daily. Please note that the number of training days will be extended if you opt for 5 hours daily.

There are no upcoming course dates currently scheduled for this course. If you are keen on attending this course, please register your interest and indicate your preferred start/end training dates via our course enquiry form for us to open a Classroom/LIVE Virtual class schedule for this course.

1. QoS Mapping

2. QoE Mapping

3. LTE QoS Framework and Tying it to QoE

  • E-UTRAN Architecture and Interfaces
  • EPS Bearer and PDN Connectivity Options and Operations
  • User Plane Connection Concepts, Packet Flows, SDFs and Traffic Flow Aggregates
  • LTE QoS Parameters, QCI, ARP
  • QoS Parameter Representation in LTE Signaling Protocols
  • QoS Management – TFTs and Packet Filters
  • LTE Policy and Charging Control (PCC) Mechanisms
  • PCC Rules, Function, and Structure for Supporting QoS and QoE
  • Interaction between PCC Elements and Internal and External Network Nodes
  • Mapping LTE QoS to Legacy Network Schemes
  • Measuring QoS and Tying it to QoE
  • QoS Influence on LTE Handovers

4. EPS Signaling – Interfaces, Protocols and Contexts

  • E-UTRAN Architecture
  • Protocol Stacks for EPS
  • Radio Protocols
  • The RRC Protocol
  • EPC Protocols
  • The S1 Application Protocol
  • The NAS Protocols (EMM and ESM)
  • The GTP Protocol
  • Encapsulation and Tunneling
  • The SGs Interface
  • Allocated Resources
  • Dedicated Bearer Activation
  • Idle and Connected Mode
  • Contexts

5. IMS

  • The Scope of IMS
  • IMS Architecture
  • Registration and Invitation
  • Protocol Stack in PGW
  • SIP Invitation, non-IMS User
  • Public and Private IMS Identities: IMPI and IMPU
  • IMS Service Profile
  • Traffic Case: IMS Invitation
  • Protocol Stack IMS Profile for Voice in EPS
  • IMS Profile for Voice
  • IMS Registration and De-registration

6. VoLTE Call Procedures

  • E- High Level SIP Signaling Flow: Understanding the IMS Signaling Flow
  • VoLTE to VoLTE Call Establishment
  • Delivering the SDP Offer:
    • SIP INVITE Composition
    • Media Anchoring (Calling Party)
    • Application Servers (Calling Party)
    • Routing the SIP Signaling to the Called Party
    • Application Servers (Called Party)
    • Media Anchoring (Called Party)
  • Delivering the SDP Answer:
    • Session Progress
    • Dedicated Bearer Establishment
    • Bidirectional Media
  • PRACK, Preconditions and Acceptance:
    • Provisional Response Acknowledgement
    • Meeting Preconditions
    • Alerting and Call Acceptance
    • Session Timers
  • VoLTE Call Termination:
    • Media Path Removal
    • Dedicated EPS Bearer Deletion
  • Activity: NetX based detailed analysis of a VoLTE-to-VoLTE call flow

7. QoS and QoE Measurement in VoLTE Procedures

  • VoLTE Accessibility
    • Accessibility Failure Signatures
    • Accessibility Failure KPIs and Protocols
    • VoLTE QoS
    • Random Access Procedure
    • Initial Attach and IMS Registration
    • E-RAB Setup Details
    • Service Request
    • VoLTE Dedicated EPS Bearer Establishment and Release
  • VoLTE Retainability
    • VoLTE Retainability
    • Synchronization
    • Maximum RLC Retransmissions
    • Drop Scenarios
    • Connection Release Causes
    • TTI Bundling and RLC Segmentation
    • Retainability Failures
  • VoLTE Mobility
    • Idle Mode Mobility
    • Connected Mode Mobility
    • Measurements Events
    • Handover Measurements
    • Handover Preparation
    • Handover Execution
    • VoLTE-to-UMTS Handover
    • LTE Measurement Procedure

8. VoLTE Capacity and Coverage Overview

  • VoLTE Capacity
  • Resources Management
  • AMR
  • Semi-Persistent Scheduling
  • PDCCH Dimensioning
  • VoLTE UL Link Budget
  • UL Link Budget for VoLTE with TTI Bundling

9. 5G QoS and Advancement

  • 5G Radio
    • 5G Performance Requirements
    • 5G Spectrum; Multi-Spectrum Scenario
    •  Air Interface Overview
    • Radio Network Virtualization (Cloud RAN)
  • Migration to 5G
    • Challenges for Migration
    • Options
  • Advanced Features Details
  • How Operators can Transit Smoothly to 5G
  • 5G Use Cases
    • Mobile Broadband
    • Automotive
    • Smart Society
    • Smart Grids
    • Health
    • Industrial
    • Logistic/Freight Tracking
  • 5G and IoT Framework Compatibility
  • 5G’s Fundamental Role in IoT

10. 5G RRC

  • RRC Protocol Architecture
  • RRC Services and Functions
  • SRBs
  • RRC Procedures and Messages (System Information, Paging, RRC Connection Establishment, Initial Security Activation, RRC Connection Reconfiguration, RRC Connection Re-establishment, RRC Connection Release, Radio Link Failure Related Actions)

11. 5G RLC and MAC

  • RLC Protocol Architecture
  • RLC Services and Functions
  • RLC Procedures and Parameters
  • RLC PDU Formats
  • MAC Protocol Architecture
  • MAC Services and Functions
  • MAC Procedures and Parameters
  • MAC PDU Formats

12. 5G Signaling Flows and Mapping QoS at Various Points

  • 5G Standalone Mode Registration-Attach Call Flow
  • 5G RAN and 5GC Network Slice Signaling
  • 5G SA Handover – Inter gNB-DU and Intra gNB-CU Handover
  • 5G SA Xn Handover Call flow
  • 5G SA N2-NGAP Handover Call flow
  • 5G EPS Fallback – 5G to 4G Handover

Participants should have some background or knowledge in telecoms regulation and the configuration and monitoring of a 4G or 5G network.

Enrolled: 0 students
Duration: Classroom: 3 days / LIVE Virtual: 21 hours
Level: Classroom

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