pdf_gross.gifLTE from A-Z - Reloaded

backtotop.gifPrinciples and Motivation of LTE

Course Description
  • Requirements on LTE
    • General Requirements
      • Support of Enhanced Quadruple Play Services, Very High Data Rates @ flexible bandwidth deployment ((1.25) 5 – 20 MHz), AIPN and PS services only
    • Important Characteristics of LTE Physical Layer
      • General Physical Layer Characteristics, OFDM , Scalable Bandwidth, Smart Antenna Technology, Fast scheduling and AMC, No Soft(er) handover, Smart Antenna Technology in LTE, Categorization of Smart Antenna Technologies, SISO, SIMO, MISO, MIMO, The Frequency Bands Intended for LTE, Exclusive usage, Refarming, Licensed operation, Unlicensed operation, Flexible Bandwidths, Parameters, Fixed subcarrier separation, Usage of carriers in the middle of the bandwidth for PBCH and synchronization signals, Deployment Scenarios
    • Important Characteristics of the LTE Layer 2 and 3
      • Support of the new LTE L1, Simple IP centric protocols supporting AIPN, Support of various inter RAT handovers (GSM, UTRA, etc.)
  • LTE and System Architecture Evolution (SAE)
    • Evolved Packet Core in Context
      • EPC vs. EPS, Non-3GPP Access Networks (trusted / non-trusted), Functional Overview of Core Network Elements within the EPC
  • The E-UTRAN Protocol Stack
    • Control Plane Protocol Stack
      • Air Interface protocols, NAS protocols
    • User Plane Protocol Stack
      • Air Interface protocols, S1 protocol
    • X2 Interface Control Plane Protocol Stack
    • X2 User Plane Protocol Stack
  • Overview Channels of E-UTRAN
    • Channel Types
      • Logical Channels, Transport Channels, Physical Channels
    • Introducing Logical Channels of E-UTRAN
      • BCCH, PCCH, CCCH, MCCH, DCCH, DTCH, MTCH
    • Introducing Transport Channels of E-UTRAN
      • RACH, UL-SCH, BCH, PCH, MCH, DL-SCH
    • Physical Channels of E-UTRAN
      • PBCH, PDCCH, PCFICH, PUCCH, PRACH, PHICH, PDSCH, PMCH, PUSCH, Downlink reference signal, Primary and secondary synchronization signal, Uplink reference signal or UL pilot symbol, Uplink sounding reference signal (SRS), Random Access Preamble
    • Mapping of Channels in E-UTRAN
  • Key Development Trends manifested in LTE
    • Mapping of User Plane Packets to the Resources
      • Method 1: Fast resource allocation on optimum resources, Method 2: Slow resource allocation on suboptimum resources, GSM, WCDMA, HSPA, LTE, General trend
    • All IP Network and Simple Packet Service Driven Protocols
      • Reduced User Plane Latency, Reduced Control Plane Latency
  • LTE Key Feature Summary
    • Air Interface Technology, System Architecture, Service Aspect

backtotop.gifKey Technologies of the LTE Physical Layer

  • Generic Assessment of Smart Antenna Techniques
    • Terminology & Introduction
      • SISO, SIMO, MISO, MIMO, Physical Basics of the Multipath Dimension, Signal Fading and Alteration between Tx and Rx, Scattering, Refraction, Reflection, Diffraction, Consequences for the different Signal Paths, Macro-Diversity vs Micro-Diversity
    • MIMO
      • Specifics of MIMO, How MIMO basically works ..., Increased Performance, Single User- vs Multi User-MIMO
    • STBC and SFBC
    • Transmit Beamforming
    • Smart Antenna Techniques in LTE
      • Overview, Receive Diversity, SFBC, SU-MIMO, MU-MIMO, Transmit Beamforming, Processing Chain and Terminology, The Term: "Codeword", The Term: "Layer", The Term: "Precoding", The Term: "Antenna Port", Antenna Port vs Antenna
  • Introduction to OFDM/OFDMA Technology
    • Impact of Orthogonality in the Frequency Domain – 3 Steps
    • Practical Exercise: Physical Basics of OFDM / OFDMA
    • OFDM / OFDMA and IFFT
      • Considering the Discrete Oscillator Array Option, Details of the IFFT Option, Why is it called F a s t Fourier Transformation?
    • Modulation Scheme Overview
    • Tackling Inter-Symbol Interference (ISI)
      • Introduction, Delay Spread, Cyclic Prefix, Variable Duration and other Assets of the Cyclic Prefix, Cyclic Prefix in OFDMA in LTE
    • From generic OFDM/OFDMA to the LTE-Implementation
      • The OFDM-"Brickwall", Time / Frequency View on OFDM: The "Grid", Subcarrier Spacing in LTE, Transmission Bandwidth in LTE, Definition of Radio Frame, Sub-Frame and Slot in LTE, Cyclic Prefix Options in LTE, Definition of Slot, Subframe and Radio Frame, Resource Blocks and TTI in LTE, Virtual vs Physical Resource Blocks, System Bandwidth and Resource Blocks, Number of RB's, FFT-Size and Bandwidth
    • SC-FDMA
      • Why SC-FDMA?, PAPR of Single-Carrier vs. Multi-Carrier Systems, The Processing Chain of SC-FDMA, Example: Processing Data through SC-FDMA, Step 1 : Converting Binary Information into Sub-Symbols, Duration of a single Sub-Symbol, Step 2: Preparation of DFT / Number Conversion, Step 3: Introducing the Formula of DFT, Step 4: Execution of M-Point DFT, Step 4: Final Result of the DFT: The 4 Subcarriers, Step 5: Shifting the Subcarriers to the Correct Frequency, Step 6: Execution of IFFT on Subcarrier x[0..3]
    • Introducing CAZAC-Sequences
      • Reviewing Autocorrelation Properties, Zadoff-Chu Sequence Generation

backtotop.gif Physical Layer Details

  • Mapping Channels to the OFDMA-Grid
    • Problem Description
      • Important Constraints for Permutation Rules
    • Mapping of Downlink Channels and Signals
      • Primary & Secondary Synchronization Signals and PBCH, Content and Meaning of PSC and SSC, Content and Meaning of the PBCH, Downlink Reference Signals, PCFICH, PHICH, PDCCH, Relationship between PDCCH and PDSCH, Transmission Mode and DCI, Example for Downlink Resource Allocation:
        DCI-Format 1 / Resource Allocation Type 0, Relationship between PDCCH and PUSCH, Example for Uplink Resource Allocation:
        DCI-Format 0 / Resource Allocation Type 2
    • Mapping of Uplink Channels and Signals
      • Time-Frequency Grid for SC-FDMA, PUCCH, PUCCH Format 1, 1a and 1b, PUCCH Format 2, 2a and 2b, PUSCH
  • Important Physical Layer Procedures
    • Random Access
      • PRACH Structure Format 0, Random Access Procedure
    • Timing Advance Control
      • Principle, Procedure, TA while the UE is not synchronized to the eNB, TA while the UE is synchronized to the eNB
    • Power Control Principle (PUSCH)

backtotop.gifThe Higher Layers of E-UTRAN

  • Features of MAC
    • Overview
      • Data transfer logical channels ?? transport channels, Radio resource allocation, Special procedures
    • MAC Random Access Procedure
      • Contention based random access procedure, Non-contention based random access procedure
    • Structure of MAC-PDU
      • MAC control element, Normal (non-transparent) MAC SDU, Transparent MAC SDU
    • MAC Control Elements
      • Contention resolution ID, Timing Advance, DRX, Padding, Power headroom report, C-RNTI, Short, long and truncated buffer status reports
    • HARQ
      • DL HARQ, Scheduling of first transmission, NACK first transmission, Scheduling of second transmission, ACK of second transmission, UL HARQ, Scheduling of first transmission, NACK first transmission, Scheduling of second transmission, ACK of second transmission
  • Features of RLC
    • Overview
      • Data transfer, Error detection and recovery, Reset
    • Structure of RLC PDU
    • Structure of RLC AM with PDCP PDU Segments
  • Features of PDCP
    • Overview
      • RoHC, Numbering of PDCP PDU’s, In-sequence delivery of PDU’s, Duplicate deletion, Encryption, Integrity Protection
    • Structure of PDCP PDU
  • Features of RRC
    • Overview
      • Transmission of broadcast information, Establish and maintain services, QoS control, Transfer of dedicated control information
    • State Characteristics of RRC
      • RRC_IDLE, RRC_CONNECTED
  • The NAS (Non-Access Stratum)
    • EPS Mobility Management (EMM)
      • Important EMM-Procedures, Common Procedures, Specific Procedures, Connection Management Procedures, State Machine, Relationship between EMM and ECM
    • EPS Session Management (ESM)
      • Important ESM-Procedures, MME-initiated, UE-initiated, State Machine
  • Bearer Concept & QoS-Architecture in SAE
    • SAE-Bearers, Classification and Policy Enforcement
    • The QoS-Profile of the SAE-Bearer
      • GBR - Guaranteed Bit Rate, MBR - Maximum Bit Rate, AMBR - Aggregate Maximum Bit Rate, ARP - Allocation Retention Priority, QCI-Values and their Meanings, Mapping between Rel. 8 QoS and earlier Releases
  • Security in LTE

backtotop.gif Selected E-UTRAN scenarios

  • Important EMM-Scenarios
    • Attachment through E-UTRAN / new MME
    • Tracking Area Update (Inter-MME / with new S-GW)
      • Initial Conditions, Detailed Description
  • Dedicated EPS Bearer Establishment
    • Network Initiated (IMS triggered during Call Establishment)
      • Initial Conditions, Detailed Description, Detailed Description
  • X2-based Handover Scenario
    • Initial Conditions, Detailed Description
  • S1-based Handover Scenario
    • Initial Conditions, Detailed Description, Detailed Description

v3.110

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