LEADER 04983nam 2200673 a 450 001 9910784355803321 005 20200520144314.0 010 $a1-281-02248-9 010 $a9786611022488 010 $a0-08-052169-X 035 $a(CKB)1000000000349849 035 $a(EBL)298369 035 $a(OCoLC)437182477 035 $a(SSID)ssj0000271878 035 $a(PQKBManifestationID)11188812 035 $a(PQKBTitleCode)TC0000271878 035 $a(PQKBWorkID)10304600 035 $a(PQKB)10924299 035 $a(Au-PeEL)EBL298369 035 $a(CaPaEBR)ebr10175585 035 $a(CaONFJC)MIL102248 035 $a(CaSebORM)9780750679718 035 $a(MiAaPQ)EBC298369 035 $a(EXLCZ)991000000000349849 100 $a20060822d2007 uy 0 101 0 $aeng 135 $aur|n|---||||| 181 $ctxt 182 $cc 183 $acr 200 10$aWi-Fi telephony$b[electronic resource] $echallenges and solutions for voice over WLANs /$fby Praphul Chandra and David Lide 205 $a1st edition 210 $aAmsterdam ;$aBoston $cElsevier/Newnes$dc2007 215 $a1 online resource (289 p.) 225 1 $aCommunications engineering series 300 $aDescription based upon print version of record. 311 $a0-7506-7971-9 320 $aIncludes bibliographical references and index. 327 $aFront 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 327 $a3.3 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 327 $a6.2 802.11e, 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 327 $a8.3 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 327 $a10.5 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 330 $aWi-Fi telephony is the latest, most cost effective, and clearest way of carrying voice data wirelessly. The great news is that it can be integrated seamlessly into the same infrastructures as currently used for computer and telephone data.The digital quality is far above current cellular technologies.This book will be among the first to discuss Session Initiation Protocol (SIP), Quality of Service (QoS), and interoperability in connection with Wi-Fi telephony. Security challenges are also presented and solved along these malleable wireless boundaries. In short, this book provides all t 410 0$aCommunications engineering series. 606 $aInternet telephony 606 $aWireless LANs 615 0$aInternet telephony. 615 0$aWireless LANs. 676 $a004.69 700 $aChandra$b Praphul$01498178 701 $aLide$b David R.$f1928-$021007 801 0$bMiAaPQ 801 1$bMiAaPQ 801 2$bMiAaPQ 906 $aBOOK 912 $a9910784355803321 996 $aWi-Fi telephony$93744917 997 $aUNINA