Course 528: WiMAX Equipment and Component Design

WiMAX (Worldwide Interoperability for Microwave Access- IEEE 802.16) is a standards-based wireless technology (an implementation of 802.16: 802.16-2004 and 802.16e) that provides high-throughput broadband connections. WiMAX can be used for a number of applications, including "last mile" broadband connections, hotspot and cellular backhaul, and high-speed enterprise connectivity for businesses.

This course provides a detailed technical view of WiMax component and network equipment esign. It is an advanced course reviewing the technical specifications and standards from a design point of view.

After a general introduction to wireless networks, this practical course moves quickly into the WiMax (802.16-2004, 802.16e) protocols, PHY, MAC (Media Access Control), framing,TDD/FDD, FDMA/OFDMA, planning and design. Real-world experiences through case studies and implementation tips located throughout the course reference material.

After successfully completing the course the student will:

• Understand the basic concepts of 802.16-2004 and 802.16e
• Understand 802.16-2004 and 802.16e Protocols (PHY, MAC)
• Understand the technical implementation of different types of 802.16-2004 and 802.16e
• Understand 802.16-2004 and 802.16e RF concepts and issues
• Explore all relevant and important topics from basic RF theory to link budget math
• Gain a good knowledge on WiMAX network equipment and ASIC design and implementation
• Be able to select the most effective WiMAX type from a wide assortment of recent and emerging implementations
• Be able to perform a more efficient design and implementation support of WiMAX ASICs and equipments

Broadband Wireless Access: an introduction to WiMAX and IEEE 802.16

• WiMAX as a WirelessMAN Technology
• Regulations
• 802.16 Benefits
• Application and Services
• "Last Mile" Broadband Connections
• Hotspot and Cellular Backhaul
• High-speed Enterprise connectivity
• 802.16 Frequency Bands
• 802.16 Family of Standards
• Current Deployments
• IEEE 802.16-2004 enhanced support for indoor CPE
• IEEE 802.16e as an extension to EEE 802.16-2004
• Implementation Scenarios and Market Opportunities
• System Profiles

WiMax Technical Information

• The Interoperability Challenge
• 802.16a amendment: 2 to 11GHz
• IEEE 802.16a and ETSI HiperMAN standards
• System Profiles for 2 - 11 GHz
• 802.16a and HiperMAN standards
• The MAC profiles for both WirelessMAN (Licensed) and WirelessHUMAN (License-exempt)
• System Profiles for 10-66 GHz
• IEEE 802.16c
• 802.16-2004 and 802.16e
• Basic ATM system MAC profile
• Basic IP system MAC profile
• 25 MHz wide channel for (typically for U.S. deployments) use in the 10-66 GHz range
• 28 MHz wide channel for (typically European deployments) use in the 10-66 GHz range
• Sub-profiles: FDD and TDD

WiMAX Protocols

• The Physical Medium Dependent Layer
• The Data Link Layer
• ATM and Packet CS
• The Network Layer
• The Transport Layer
• Physical Layer (PHY) specifications
• Channel Spacing, Modulation
• Physical Layer Architecture
• Physical Layer Operations
• 802.16 PHY (SCa, FDMA, OFDMA and SCOFDM)
  • Orthogonal Frequency Division Multiplexing (OFDM)
  • Orthogonal Frequency Division Multiple Access (OFDMA)
• Scheduling and Link Adaptation
• Adaptive Modulation Scheme
• Binary Phase Shift Keying (BPSK)
• Quadrature Phase Shift Keying (QPSK)
• 16-Quadrature Amplitude Modulation (QAM)
  • 64-QAM
  • 256-QAM
• Security
• DES encryption/decryption
• Variable-rate Read-Solomon (RS)/Convolutional Coding (CC) scheme
• ARQ active on all connections
• TDD vs. FDD
• Symmetric UL/DL traffic
• 256 point FFT OFDM PHY mode
• Scalable OFDMA (SOFDMA) Physical Layer in IEEE 802.16 WirelessMAN
• STC and Other Standard-Compliant Diversity Schemes
• Mutlicarrier Design Requirements and Tradeoffs
• The Basics of OFDMA Frame Structure
• Subcarrier Allocation Modes
• Diversity Options
• Ranging in OFDMA
• Channel Coding
• PHY Transmit diversity in the Downlink (DL)
• H-ARQ (Hybrid ARQ)
• Space Time Coding (STC)
• Adaptive Antenna Systems (AAS)
• Multiple Input, Multiple Output (MIMO)
• MIMO for Throughput and Range
• Spatial Division Multiple Access (SDMA)
• Other Diversity Schemes

802.16 Physical Layer Procedures (PHY)

• The original 802.16 standard and the 10-66GHz frequency band
• 802.16 Service Areas
• WiMAX's technology for LOS and NLOS environments
• PHY Considerations
• Effect of multipath
• High Capacity Links on both the Uplink and the Downlink
• 802.16a Extension and a Lower Frequency of 2-11GHz
• WirelessMAN-SC PHY
• WirelessMAN-SCa PHY
• WirelessMAN-FDMA PHY
• WirelessMAN-OFDMA PHY
• 802.16-2004 and 802.16e PHY
• What are Non line-of-sight (NLOS) Connections?
• Time Division Duplexing (TDD)
• Frequency Division Duplexing (FDD)
• The 802.16e and Mobile 802.16 Clients
• Hand-off Between 802.16 Base Stations

802.16 Medium Access Control (MAC)

• MAC Layer Operations
• MAC Frame Structure
• Framing in Detail
• MAC Frame Type and Classes
• Access Methods
• Synchronization
• Power management
• Variable Length Protocol Data Unit (PDU)
• Self-correcting Bandwidth Request/Grant Scheme
• Link adaptation and Automatic Repeat Request (ARQ) functions
• Fast path activities (such as scheduling, packing, fragmentation, and ARQ)
• UL and DL schedulers
• QoS on IEEE 802.16
• High bit rates (up to 268 mbps each way)
• Delivering ATM Compatible QoS: UGS, rtPS, nrtPS, and Best Effort
• Implementation Challenges on MAC and QoS

 Security Sublayer

• Security Basics
• Standard Defenses
• Denial of Service Attacks
• Hackers
• Intrusion Detection Systems
• Network Monitoring
• Threats
• Securing 802.16 Networks
• PKM Protocol
• Virtual Private Networks (VPNs)
• Rogue Detection, IDS, Policy Enforcement
• Policy Management
• Wireless Policy Violations
• AAA and Radius
• 802.1X Authentication and Access Control
• 802.1X Key Management
• Message Integrity
• Three Models of Connectivity
• Setting Up the DHCP Server
• Setting Up the Routing and Remote Access (VPN) Server
• Setting Up IPSec over L2TP
• Setting Up the VPN Client
• User-specific Security Policies and Roaming across Subnets
• Best Practices for a Secure Wireless Solution
• Tools and Products

 WiMAX RF Models

• Fixed, nomadic and mobile channel models
• How to model a radio channel?
• Fixed and Nomadic channel models
• Fading characteristics fade distribution, K-Factor
• Modified Stanford University Interim (SUI) channel models
• SUI channel models implementation
• Mobile channel models
• Mobile channel models implementation
• Simulation Results

WIMAX RF and Core Network Component and Network Design

• Engineering planning, design, deployment and optimization
• Radio and traffic engineering
• Site engineering and planning
• Network, backhaul and core engineering
• Commissioning and troubleshooting
• Network management systems
• Component design principals
• WiMax PHY and MAC parameters
• Simulation approaches
• Case studies

802.16 System Profiles

• WiMAX Basic Profiles for WirelessMAN OFDM
• WiMAX Basic Profiles for WirelessMAN OFDMA