Wi-Fi Telephony

Book description

Wi-Fi telephony is the latest, most cost effective, and clearest way of carrying voice data wirelessly. The great news is that it can be integrated seamlessly into the same infrastructures as currently used for computer and telephone data.The digital quality is far above current cellular technologies.

This book will be among the first to discuss Session Initiation Protocol (SIP), Quality of Service (QoS), and interoperability in connection with Wi-Fi telephony. Security challenges are also presented and solved along these malleable wireless boundaries. In short, this book provides all the information necessary for effective, reliable, crystal clear Wi-Fi telephony service and implementation.

*Using current telephone and computer infrastructure this technology can be implemented at low cost
*The importance of Quality of Service (QoS) and security of Wi-Fi telephony is considered
*Enhances the clarity of a call beyond a basic cellular phone using digital data transfer

Table of contents

  1. Front Cover
  2. Wi-Fi Telephony: Challenges and Solutions for Voice over WLANs
  3. Copyright Page
  4. Contents
  5. Acknowledgments
  6. Acronyms (1/2)
  7. Acronyms (2/2)
  8. About the Authors
  9. Chapter 1. The Telephony World
    1. 1.1 The Basics
    2. 1.2 Digitizing Speech
    3. 1.3 PSTN Architecture
    4. 1.4 Signaling (1/2)
    5. 1.4 Signaling (2/2)
    6. 1.5 Voice and Wireless Networks (1/2)
    7. 1.5 Voice and Wireless Networks (2/2)
    8. 1.6 Summary
  10. Chapter 2. The Data World
    1. 2.1 Introduction
    2. 2.2 Brief History
    3. 2.3 The OSI Seven-Layer Model
    4. 2.4 The IP Protocol
    5. 2.5 The TCP/IP Transport Layer (1/2)
    6. 2.5 The TCP/IP Transport Layer (2/2)
    7. 2.6 Other TCP/IP-Based Protocols
    8. 2.7 Conclusion
    9. References
  11. Chapter 3. Voice over IP
    1. 3.1 Introduction
    2. 3.2 Putting Voice Over Internet
    3. 3.3 VoIP Architectures
    4. 3.4 Signaling Protocols (1/5)
    5. 3.4 Signaling Protocols (2/5)
    6. 3.4 Signaling Protocols (3/5)
    7. 3.4 Signaling Protocols (4/5)
    8. 3.4 Signaling Protocols (5/5)
    9. 3.5 Voice-over-IP Media
    10. 3.6 The Overall Picture
    11. References
  12. Chapter 4. Wireless Local Area Networks
    1. 4.1 Introduction
    2. 4.2 The Alphabet Soup
    3. 4.3 Network Architecture
    4. 4.4 802.11 Framing
    5. 4.5 Accessing the Medium (1/2)
    6. 4.5 Accessing the Medium (2/2)
    7. 4.6 802.11 PHY (1/2)
    8. 4.6 802.11 PHY (2/2)
    9. 4.7 Power Save in 802.11
    10. 4.8 Conclusion
  13. Chapter 5. VoWLAN Challenges
    1. 5.1 Introduction
    2. 5.2 VoWLAN
    3. 5.3 System Capacity and QoS (1/2)
    4. 5.3 System Capacity and QoS (2/2)
    5. 5.4 PCF
    6. 5.5 Admission Control
    7. 5.6 Security
    8. 5.7 Power Save
    9. 5.8 Roaming/Handoffs in 802.11
    10. 5.9 Summary
  14. Chapter 6. QoS and System Capacity
    1. 6.1 Introduction
    2. 6.2 802.11e, WME and “Vanilla” WLANs
    3. 6.3 Traffic Categories
    4. 6.4 Transmission Opportunity
    5. 6.5 EDCF
    6. 6.6 HCF
    7. 6.7 Voice Data Coexistence
    8. 6.8 Achieving QoS for VoWLAN
    9. 6.9 System Capacity
    10. 6.10 Admission Control
    11. 6.11 Summary
  15. Chapter 7. Security
    1. 7.1 Introduction
    2. 7.2 Key Establishment in 802.11
    3. 7.3 Anonymity in 802.11
    4. 7.4 Authentication in 802.11 (1/2)
    5. 7.4 Authentication in 802.11 (2/2)
    6. 7.5 Confidentiality in 802.11
    7. 7.6 Data Integrity in 802.11
    8. 7.7 Loopholes in 802.11 Security
    9. 7.8 WPA (1/3)
    10. 7.8 WPA (2/3)
    11. 7.8 WPA (3/3)
    12. 7.9 WPA2 (802.11i) (1/2)
    13. 7.9 WPA2 (802.11i) (2/2)
    14. 7.10 Beyond 802.11 Security (1/2)
    15. 7.10 Beyond 802.11 Security (2/2)
    16. 7.11 Conclusion
  16. Chapter 8. Roaming
    1. 8.1 The Need for Roaming
    2. 8.2 Types of Roaming
    3. 8.3 Roaming Issues
    4. 8.4 Roaming and Voice
    5. 8.5 Preparing to Roam: Scanning (1/2)
    6. 8.5 Preparing to Roam: Scanning (2/2)
    7. 8.6 When to Roam
    8. 8.7 Where to Roam
    9. 8.8 Reauthentication Delays
    10. 8.9 Inter-ESS Roaming
    11. 8.10 Future Enhancements
    12. 8.11 Conclusion
  17. Chapter 9. Power Management
    1. 9.1 The Need for Power Management
    2. 9.2 Underlying Philosophy of Power Management
    3. 9.3 Designing for Power Management (1/2)
    4. 9.3 Designing for Power Management (2/2)
    5. 9.4 Implementing Power Management (1/2)
    6. 9.4 Implementing Power Management (2/2)
    7. 9.5 An Operational Perspective
    8. 9.6 Summary
  18. Chapter 10. Voice over Wi-Fi and Other Wireless Technologies
    1. 10.1 Introduction
    2. 10.2 Ongoing 802.11 Standard Work
    3. 10.3 Wi-Fi and Cellular Networks (1/2)
    4. 10.3 Wi-Fi and Cellular Networks (2/2)
    5. 10.4 WiMax
    6. 10.5 VoWi-Fi and Bluetooth
    7. 10.6 VoWi-Fi and DECT
    8. 10.7 VoWi-Fi and Other Ongoing 802.x Wireless Projects
    9. 10.8 Conclusion
    10. References
  19. Index (1/2)
  20. Index (2/2)

Product information

  • Title: Wi-Fi Telephony
  • Author(s): Praphul Chandra, David Lide
  • Release date: April 2011
  • Publisher(s): Newnes
  • ISBN: 9780080521695