Voice Over WLANS

Voice Over WLANS

by Michael F. Finneran
Released April 2011
Publisher(s): Newnes
ISBN: 9780080556437

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Book description

For networking and RF/wireless engineers, and graduate students who want a solid overview of voice over WLANs/VoIP technology (wireless local area networks / voice over internet protocol), this book covers voice coding, packet loss, delay and 'jitter', and 'echo' control, and shows how to combine both WLAN and VoIP technology to create effective voice over WLAN systems. Finneran also describes how to integrate voice over WLAN systems with cellular networks.

This is not just another WLAN-only book nor a VoIP-only book; instead, it integrates both topics into a coherent whole.

* Gives complete details on integrating voice and data services on WLANs, including wide area networks
* Explores quality of service (QoS) and security issues
* Step-by-step descriptions of how to plan and implement voice over WLAN networks

Table of contents

  1. Front cover
  2. Voice Over WLANs: The Complete Guide
  3. Copyright page
  4. Table of contents (1/2)
  5. Table of contents (2/2)
  6. About the Author
  7. Preface (1/2)
  8. Preface (2/2)
  9. Acknowledgments
  10. CHAPTER 1: The Convergence of Wireless LANs and VoIP
    1. 1.1 The WLAN Voice Market
    2. 1.2 Development of Wireless LANs
    3. 1.3 Wireless LAN Applications
    4. 1.4 Health Issues with Wireless Devices
    5. 1.5 Wireless LAN Organizations
    6. 1.6 WLAN Configurations
    7. 1.7 Wireless LAN Design Issues
    8. 1.8 The Packet Telephony Revolution
    9. 1.9 Local Area IP Telephony: IP PBX
    10. 1.10 Wide Area VoIP
    11. 1.11 Enterprise VoIP Networks
    12. 1.12 Consumer Packet Telephony Services
    13. 1.13 Conclusion
  11. CHAPTER 2: Radio Transmission Fundamentals
    1. 2.1 Defining Transmission Capacity and Throughput
    2. 2.2 Bandwidth, Radios, and Shannon’s Law
    3. 2.3 Bandwidth Efficiency
    4. 2.4 Forward Error Correction (FEC)
    5. 2.5 Radio Regulation
    6. 2.6 Licensed Versus Unlicensed Radio Spectrum
    7. 2.7 Unlicensed Spectrum in the Rest of the World
    8. 2.8 General Difficulties in Wireless
    9. 2.9 Basic Characteristics of 802.11 Wireless LANs
    10. 2.10 Conclusion
  12. CHAPTER 3: Wireless LAN Components/WLAN Switches
    1. 3.1 Elements in a Wireless LAN
    2. 3.2 Wireless LAN NICs
    3. 3.3 Access Points (APs)
    4. 3.4 Antennas
    5. 3.5 Distributed Antenna Systems
    6. 3.6 WLAN Repeaters
    7. 3.7 Mesh Extension
    8. 3.8 Wireless LAN Switches
    9. 3.9 Wireless LAN Switch Features
    10. 3.10 Selecting WLAN Switches
    11. 3.11 WLAN Switch Architectures
    12. 3.12 Conclusion
  13. CHAPTER 4: Media Access Control Protocol
    1. 4.1 Basic Characteristics and Peculiarities of Wireless LANs
    2. 4.2 Media Access Control Protocol—CSMA/CA
    3. 4.4 Physical Layer Convergence Protocol (PLCP)
    4. 4.5 MAC Frame Header
    5. 4.6 MAC Addresses (Address 1–4)
    6. 4.7 Authentication and Association
    7. 4.8 Beacon Message
    8. 4.9 Authentication Process
    9. 4.10 Association Options
    10. 4.11 Reassociation/Handoff
    11. 4.12 CSMA/CA Distributed Control Function (DCF)
    12. 4.13 Request-To-Send/Clear-To-Send (RTS/CTS) Operation
    13. 4.14 Point Control Function (PCF)
    14. 4.15 PCF Basic Concept
    15. 4.16 Other Protocol Features
    16. 4.17 Power Save Features
    17. 4.18 Throughput Considerations
    18. 4.19 Conclusion
  14. CHAPTER 5: 802.11 Radio Link Specifications
    1. 5.1 Defined Radio Link Interfaces
    2. 5.2 Signal Modulation
    3. 5.3 Spread Spectrum Transmission
    4. 5.4 Frequency Hopping Spread Spectrum (FHSS)
    5. 5.5 Direct Sequence Spread Spectrum (DSSS)
    6. 5.6 Orthogonal Frequency Division Multiplexing (OFDM)
    7. 5.7 Forward Error Correction (FEC)
    8. 5.8 The 2.4 GHz Radio Links
    9. 5.9 802.11 Radio Link Options: 1 and 2 Mbps
    10. 5.10 Frequency Hopping Spread Spectrum
    11. 5.11 802.11 DSSS Radio Link
    12. 5.12 802.11b Radio Link Interface: DSSS
    13. 5.13 IEEE 802.11g Radio Link Interface: OFDM
    14. 5.14 802.11a 5 GHz Radio Link Interface
    15. 5.15 Additional 5 MHz Spectrum: 11 Additional Channels
    16. 5.16 Tradeoffs with 802.11a
    17. 5.17 The Developing IEEE 802.11n Radio Link
    18. 5.18 The IEEE 802.11n Draft Specification (1/2)
    19. 5.18 The IEEE 802.11n Draft Specification (2/2)
    20. 5.19 Non-Standard Radio Links: Pre-n and Super G
    21. 5.20 Conclusion
  15. CHAPTER 6: Privacy and Security Issues in WLANs
    1. 6.1 Security Requirements: Authentication, Privacy, and Availability
    2. 6.2 WLAN Security Policy Recommendations
    3. 6.3 WLAN Security Exposure
    4. 6.4 Recognized Security Vulnerabilities
    5. 6.5 Three Generations of WLAN Security
    6. 6.6 Wired Equivalent Privacy (WEP)
    7. 6.7 How Vulnerable is WEP?
    8. 6.8 The VLAN/VPN Stopgap
    9. 6.9 New Wireless LAN Security Protocols: 802.11i and 802.1x
    10. 6.10 802.11i/WPA2: Advanced Encryption Standard (AES)
    11. 6.11 Implementation Difficulties
    12. 6.12 Wi-Fi Alliance’s Wi-Fi Protected Access (WPA Certified)
    13. 6.13 WPA and WPA2 Implementation: Personal Versus Enterprise
    14. 6.14 Extensible Authentication Protocol (EAP): 802.1x
    15. 6.15 802.1x Authentication Protocols
    16. 6.16 Wireless Intrusion Detection and Network Access Control Systems
    17. 6.17 Network Access Control (NAC)
    18. 6.18 Special Issues in WLAN Voice Security
    19. 6.19 Solutions for Mixed Security Environments
    20. 6.20 Conclusion
  16. CHAPTER 7: IP Routing for Voice
    1. 7.1 Protocols, Compatibility, and The OSI Reference Model
    2. 7.2 The Open Systems Interconnection (OSI) Reference Model
    3. 7.3 OSI Layers and Functions
    4. 7.4 The Internet and TCP/IP
    5. 7.5 Overall Organization of TCP/IP
    6. 7.6 Dissecting TCP/IP
    7. 7.7 TCP and UDP Supported Applications
    8. 7.8 TCP/IP Protocols for Voice: RTP and RTCP
    9. 7.9 Real-Time Control Protocol (RTCP)
    10. 7.10 Quality of Service
    11. 7.11 Layer 2 QoS Options
    12. 7.12 Layer 3 QoS
    13. 7.13 MPLS-Based VPN Service: RFC 2547bis
    14. 7.14 MPLS Service Classes
    15. 7.15 Excess Traffic Handling
    16. 7.16 VoIP Signaling Protocols
    17. 7.17 Session Initiation Protocol (SIP)
    18. 7.18 Conclusion
  17. CHAPTER 8: Quality Issues in IP Telephony
    1. 8.1 Quality Issues in Packet Telephony
    2. 8.2 Voice Compression Techniques
    3. 8.3 Other Voice Quality Issues
    4. 8.4 Voice Compression in WLAN Voice Networks
    5. 8.5 Delay Tolerance
    6. 8.6 Jitter/Delay Sources
    7. 8.7 Real-Time Transport Protocol (RTP)
    8. 8.8 Echo Control
    9. 8.9 Measuring Voice Quality
    10. 8.10 Absolute Category Rating (ACR)/Mean Opinion Score (MOS)
    11. 8.11 Sample-Based Objective Testing: ITU P.861, P.862, and P.563
    12. 8.12 Other Factors in Voice Quality
    13. 8.13 Conclusion
  18. CHAPTER 9: Voice Network Design and Traffic Engineering
    1. 9.1 Business Telephone Systems: Electronic Key Telephone and PBX Systems
    2. 9.2 User Stations
    3. 9.3 Telephone Network Services
    4. 9.4 Telephone Traffic Engineering
    5. 9.5 Traffic Engineering Terms
    6. 9.6 P-Grade of Service/Probability of Blocking
    7. 9.7 Traffic Engineering Process
    8. 9.8 Voice Traffic Engineering for IP Voice Systems
    9. 9.9 Voice Traffic Engineering in WLAN Networks
    10. 9.10 Conclusion
  19. CHAPTER 10: WLAN Voice Configuration
    1. 10.1 Voice over WLAN Architectures
    2. 10.2 Wireless LAN Switch
    3. 10.3 Voice over WLAN Handsets/Clients
    4. 10.4 Enterprise Voice over Wireless LAN Systems
    5. 10.5 Wi-Fi Cellular Handsets
    6. 10.6 Wi-Fi PDAs and Softphone Clients
    7. 10.7 What to Look For in Wi-Fi Handsets
    8. 10.8 DECT (Digital Enhanced Cordless Telecommunication) Standard
    9. 10.9 Conclusion
  20. CHAPTER 11:Technical Requirements for WLAN Voice
    1. 11.1 Pervasive WLAN Infrastructure
    2. 11.2 VoIP Quality Issues in WLANs
    3. 11.3 IEEE 802.11e WLAN MAC Quality of Service Enhancements
    4. 11.4 802.11e EDCA
    5. 11.5 HCF Controlled Channel Access (HCCA)/Wi-Fi Multimedia-Scheduled Access (WMM-SA)
    6. 11.6 Capacity and Quality of Service
    7. 11.7 Access Control and Load Balancing
    8. 11.8 Vendor Proprietary Voice QoS Techniques
    9. 11.9 SpectraLink Voice Priority (SVP)
    10. 11.10 Meru Networks: Air Traffic Control
    11. 11.11 WLAN Handoffs
    12. 11.12 WLAN Voice Security Exposure
    13. 11.13 Authentication/Toll Fraud
    14. 11.14 E911 Compliance: WLAN Station Location
    15. 11.15 Battery Life
    16. 11.16 Conclusion
  21. CHAPTER 12: Fixed-Mobile Convergence: WLAN/Cellular Integration
    1. 12.1 Customer Motivation
    2. 12.2 Fixed-Mobile Convergence Options
    3. 12.3 Cellular Technology
    4. 12.4 Cellular Network Configuration
    5. 12.5 Network Controlled Convergence
    6. 12.6 Cell Phone Signaling Interconnect
    7. 12.7 Fixed-Mobile Convergence in the US: T-Mobile’s HotSpot@Home
    8. 12.8 Cellular Service as an Alternative to VoWi-Fi
    9. 12.9 Improving Indoor Coverage: Distributed Antenna Systems, Microcells, and Femtocells
    10. 12.10 PBX-Controlled Convergence Solutions
    11. 12.11 PBX-Controlled Options: Manual Handoff
    12. 12.12 PBX-Controlled Solutions: Automatic Handoff
    13. 12.13 WiMAX Broadband Wireless Access
    14. 12.14 WiMAX Deployment Plans
    15. 12.15 WiMAX Technology
    16. 12.16 Other WiMAX Radio Link Features
    17. 12.17 MAC Protocol/Quality of Service (QoS)
    18. 12.18 Conclusion
  22. CHAPTER 13: Designing a Wireless LAN for Voice
    1. 13.1 Designing Wireless LANs
    2. 13.2 Basic Planning Steps in a VoWLAN Deployment
    3. 13.3 RF Design and Mapping Tools
    4. 13.4 Infrastructure Design: RF Site Survey (1/2)
    5. 13.4 Infrastructure Design: RF Site Survey (2/2)
    6. 13.5 Access Point Issues: Range/Capacity Guidelines
    7. 13.6 Conclusion
  23. CHAPTER 14: Network Management in Wireless LANs
    1. 14.1 Network Management
    2. 14.2 Record Keeping and Administration
    3. 14.3 Performance Monitoring
    4. 14.4 Capacity Planning
    5. 14.5 Troubleshooting/Problem Isolation
    6. 14.6 Security Monitoring
    7. 14.7 Conclusion
  24. APPENDIX: The IEEE 802.11 Standards (1/2)
  25. APPENDIX: The IEEE 802.11 Standards (2/2)
  26. Glossary of Acronyms (1/2)
  27. Glossary of Acronyms (2/2)
  28. Glossary of Terms (1/6)
  29. Glossary of Terms (2/6)
  30. Glossary of Terms (3/6)
  31. Glossary of Terms (4/6)
  32. Glossary of Terms (5/6)
  33. Glossary of Terms (6/6)
  34. Index (1/2)
  35. Index (2/2)

Product information

  • Title: Voice Over WLANS
  • Author(s): Michael F. Finneran
  • Release date: April 2011
  • Publisher(s): Newnes
  • ISBN: 9780080556437