4G " Long Term Evolution (LTE) Air Interface

Course details

Long Term Evolution (LTE) is the new 3GPP standard for wireless broad band data services. It comprises E-UTRA network; which uses OFDMA technology and EPC (Evolved Packet Core), an all-IP core network. This framework allows the migration of 3GPP system towards packet-optimized system that supports multiple RATs (Radio yAccess Technologies), higher-data-rates and lower-latencies. Also it provides an evolutionary path for 3GPP and non-3GPP legacy technologies.

This course provides an in-depth discussion of LTE air interface. It begins with an overview of LTE/E-UTRAN network architecture and protocols and introduces OFDMA, the key technology of LTE, and then discusses the DL and UL channels, signals and operations. This is followed by a comprehensive discussion of MAC, RLC and PHY layers of the LTE air interface.

Expected Rccompllshmerits

• Describe network architecture evolution OFDM Basics
• Explain OFDM Concepts
• Understand in details the physical layer and operations in mobility and idle mode
• Describe Ml MO in LTE
• Understand MAC and RLC in details
• Study LTE Packet Data Convergence Protocol (PDCP) Layer
• Explain the details of RRC layer and operations

Course Outline

Evolved Packet System Network Architecture ft Protocols 

• Describe network architecture evolution
• Explain Evolved Packet System (EPS) network entities and interfaces 
• Describe EPS user and control plane protocol stacks 
• Iden tify basic EPS Security aspects
• Explain mobility management, session management, and IP connectivity aspects 
• Explain EPS QoS architecture and principles

OFDM basics

• Explain OFDM basic concepts 
• OFDM A, multipath and cyclic prefix 
• Understand OFDM and SC-FDMA

E-UTRA Essentials

• Identify the main E-UTRA Air Interface capabilities 
• Air Interface peak data rates and UE categories
• Understand E-UTRA Downlink and Uplink time and frequency organization 
• Define the components of the E-UTRA UL/DL resource grid 
• DL/UL scheduling and interference management

E-UTRA Downlink (DL) Channels, signals ft operation 

• Discuss E-UTRA DL physical channels and signals 
• Discuss the initial acquisition procedure
• Describe DL shared channel operation
• Describe the role of DL control channels in DL operation 
• Understand how channel feedback information is reported by the UE in the UL Describe DL HARQ operation 
• Describe DL data transfer modes 
• Ml MO in LTE

E-UTRA Uplink (UL) Channels, signals and operation

• Describe E-UTRA UL channels and channel mapping onto time/frequency resources 
• Describe E-UTRA UL operations 
• Comparison between LTE and HSPA operations

LTE Physical Layer

• Describe frame, subframe, and slot structure in Downlink and Uplink
• Describe resource block and resource elements
• Describe physical layer processing for Downlink and Uplink channels
• Describe reference signals used in Downlink and Uplink

LTE Medium Access Control (MAC) Layer

• Describe key MAC functions
• Explain channel mapping and multiplexing
• Describe MAC PDU formats for different transport channels
• Describe RACH procedure
• Explain timing alignment and (DRX) procedures

LTE Radio Link Control (RLC) Layer

• List the functions of RLC
• Describe the different RLC modes in LTE
• Compare RLC implementations in LTE and HSPA
• Describe the re-segmentation process for retransmissions

LTE PDCP Layer

• Provide an overview of PDCP 
• Describe PDCP data and control PDU formats 
• Describe PDCP functions 
• LTE and HSPA comparison

LTE RRC Layer

• Provide an overview of RRC in LTE 
• Describe idle mode procedure 
• Show what RRC signaling is used in Connected mode 
• Describe Radio Link Failure (RLF) Handling in UE