Wi-Fi telephony [[electronic resource] ] : challenges and solutions for voice over WLANs / / by Praphul Chandra and David Lide

• Record Nr.: UNINA9910784355803321
• Autore: Chandra Praphul
• Pubbl/distr/stampa: Amsterdam ; ; Boston, : Elsevier/Newnes, c2007
• ISBN: 1-281-02248-9; 9786611022488; 0-08-052169-X
• Edizione: [1st edition]
• Descrizione fisica: 1 online resource (289 p.)
• Collana: Communications engineering series
• Altri autori (Persone): LideDavid R. <1928->
• Disciplina: 004.69
• Soggetti: Internet telephony; Wireless LANs
• Lingua di pubblicazione: Inglese
• Formato: Materiale a stampa
• Livello bibliografico: Monografia
• Note generali: Description based upon print version of record.
• Nota di bibliografia: Includes bibliographical references and index.
• Nota di contenuto: Front Cover; Wi-Fi Telephony: Challenges and Solutions for Voice over WLANs; Copyright Page; Contents; Acknowledgments; Acronyms; About the Authors; Chapter 1. The Telephony World; 1.1 The Basics; 1.2 Digitizing Speech; 1.3 PSTN Architecture; 1.4 Signaling; 1.5 Voice and Wireless Networks; 1.6 Summary; Chapter 2. The Data World; 2.1 Introduction; 2.2 Brief History; 2.3 The OSI Seven-Layer Model; 2.4 The IP Protocol; 2.5 The TCP/IP Transport Layer; 2.6 Other TCP/IP-Based Protocols; 2.7 Conclusion; References; Chapter 3. Voice over IP; 3.1 Introduction; 3.2 Putting Voice Over Internet; 3.3 VoIP Architectures3.4 Signaling Protocols; 3.5 Voice-over-IP Media; 3.6 The Overall Picture; References; Chapter 4. Wireless Local Area Networks; 4.1 Introduction; 4.2 The Alphabet Soup; 4.3 Network Architecture; 4.4 802.11 Framing; 4.5 Accessing the Medium; 4.6 802.11 PHY; 4.7 Power Save in 802.11; 4.8 Conclusion; Chapter 5. VoWLAN Challenges; 5.1 Introduction; 5.2 VoWLAN; 5.3 System Capacity and QoS; 5.4 PCF; 5.5 Admission Control; 5.6 Security; 5.7 Power Save; 5.8 Roaming/Handoffs in 802.11; 5.9 Summary; Chapter 6. QoS and System Capacity; 6.1 Introduction; 6.2 802.11e, WME and "Vanilla" WLANs6.3 Traffic Categories; 6.4 Transmission Opportunity; 6.5 EDCF; 6.6 HCF; 6.7 Voice Data Coexistence; 6.8 Achieving QoS for VoWLAN; 6.9 System Capacity; 6.10 ; Admission Control; 6.11 Summary; Chapter 7. Security; 7.1 Introduction; 7.2 Key Establishment in 802.11; 7.3 Anonymity in 802.11; 7.4 Authentication in 802.11; 7.5 Confidentiality in 802.11; 7.6 Data Integrity in 802.11; 7.7 Loopholes in 802.11 Security; 7.8 WPA; 7.9 WPA2 (802.11i); 7.10 Beyond 802.11 Security; 7.11 Conclusion; Chapter 8. Roaming; 8.1 The Need for Roaming; 8.2 Types of Roaming; 8.3 Roaming Issues8.4 Roaming and Voice; 8.5 Preparing to Roam: Scanning; 8.6 When to Roam; 8.7 Where to Roam; 8.8 Reauthentication Delays; 8.9 Inter-ESS Roaming; 8.10 Future Enhancements; 8.11 Conclusion; Chapter 9. Power Management; 9.1 The Need for Power Management; 9.2 Underlying Philosophy of Power Management; 9.3 Designing for Power Management; 9.4 Implementing Power Management; 9.5 An Operational Perspective; 9.6 Summary; Chapter 10. Voice over Wi-Fi and Other Wireless Technologies; 10.1 Introduction; 10.2 Ongoing 802.11 Standard Work; 10.3 Wi-Fi and Cellular Networks; 10.4 WiMax; 10.5 VoWi-Fi and Bluetooth10.6 VoWi-Fi and DECT; 10.7 VoWi-Fi and Other Ongoing 802.x Wireless Projects; 10.8 Conclusion; References; Index
• Sommario/riassunto: 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 t