VoLTE and ViLTE: Voice and Conversational Video Services over the 4G Mobile Network

¡ John Wiley & Sonsā§° āĻĻā§āĻŦāĻžā§°āĻž āĻŦāĻŋāĻ•ā§ā§°ā§€ āĻ•ā§°āĻž āĻšā§ˆāĻ›ā§‡
āĻ‡āĻŦā§āĻ•
336
āĻĒā§ƒāĻˇā§āĻ āĻž

āĻāĻ‡ āĻ‡āĻŦā§āĻ•āĻ–āĻ¨ā§° āĻŦāĻŋāĻˇā§Ÿā§‡

This book presents the architecture of two networks that make up the backbone of the telephone service VoLTE and video service ViLTE. The 4G mobile network makes it possible to construct bearers through which IP packets, containing either telephone signals (SIP, SDP) or voice or video media (RTP stream), are transported.

The IMS network performs the processing of the telephone signal to provide VoLTE and ViLTE services, including call routing and the provision of additional services. Different procedures are described: the set-up and termination of a session, interconnection with third-party networks, roaming and intra-system handover.

The inter-system handover PS-CS is a special case that occurs when the mobile loses 4G network coverage over the course of a session. The e-SRVCC mechanism enables continuity of the service during the switch of the telephone communication to the 2G or 3G networks. The SMS service for short messages, which is a special telephone service in itself, is provided by two structures, one relying on the IMS network, and a second on the CSFB functionality.

āĻ˛āĻŋāĻ–āĻ•ā§° āĻŦāĻŋāĻˇāĻ¯āĻŧā§‡

AndrÊ Perez is a consultant and teacher in networks and telecommunications. He works with industrialists and operators regarding architecture studies and leads training on the 4G and IMS networks for NEXCOM SYSTEMS.

āĻāĻ‡ āĻ‡āĻŦā§āĻ•āĻ–āĻ¨āĻ• āĻŽā§‚āĻ˛ā§āĻ¯āĻžāĻ‚āĻ•āĻ¨ āĻ•ā§°āĻ•

āĻ†āĻŽāĻžāĻ• āĻ†āĻĒā§‹āĻ¨āĻžā§° āĻŽāĻ¤āĻžāĻŽāĻ¤ āĻœāĻ¨āĻžāĻ“āĻ•āĨ¤

āĻĒāĻĸāĻŧāĻžā§° āĻ¨āĻŋāĻ°ā§āĻĻā§‡āĻļāĻžā§ąāĻ˛ā§€

āĻ¸ā§āĻŽāĻžā§°ā§āĻŸāĻĢ’āĻ¨ āĻ†ā§°ā§ āĻŸā§‡āĻŦāĻ˛ā§‡āĻŸ
Android āĻ†ā§°ā§ iPad/iPhoneā§° āĻŦāĻžāĻŦā§‡ Google Play Books āĻāĻĒāĻŸā§‹ āĻ‡āĻ¨āĻˇā§āĻŸāĻ˛ āĻ•ā§°āĻ•āĨ¤ āĻ‡ āĻ¸ā§āĻŦāĻ¯āĻŧāĻ‚āĻ•ā§āĻ°āĻŋāĻ¯āĻŧāĻ­āĻžā§ąā§‡ āĻ†āĻĒā§‹āĻ¨āĻžā§° āĻāĻ•āĻžāĻ‰āĻŖā§āĻŸā§° āĻ¸ā§ˆāĻ¤ā§‡ āĻ›āĻŋāĻ‚āĻ• āĻšāĻ¯āĻŧ āĻ†ā§°ā§ āĻ†āĻĒā§āĻ¨āĻŋ āĻ¯'āĻ¤ā§‡ āĻ¨āĻžāĻĨāĻžāĻ•āĻ• āĻ¤'āĻ¤ā§‡āĻ‡ āĻ•ā§‹āĻ¨ā§‹ āĻ…āĻĄāĻŋāĻ…'āĻŦā§āĻ• āĻ…āĻ¨āĻ˛āĻžāĻ‡āĻ¨ āĻŦāĻž āĻ…āĻĢāĻ˛āĻžāĻ‡āĻ¨āĻ¤ āĻļā§āĻ¨āĻŋāĻŦāĻ˛ā§ˆ āĻ¸ā§āĻŦāĻŋāĻ§āĻž āĻĻāĻŋāĻ¯āĻŧā§‡āĨ¤
āĻ˛ā§‡āĻĒāĻŸāĻĒ āĻ†ā§°ā§ āĻ•āĻŽā§āĻĒāĻŋāĻ‰āĻŸāĻžā§°
āĻ†āĻĒā§āĻ¨āĻŋ āĻ•āĻŽā§āĻĒāĻŋāĻ‰āĻŸāĻžā§°ā§° ā§ąā§‡āĻŦ āĻŦā§āĻ°āĻžāĻ‰āĻœāĻžā§° āĻŦā§āĻ¯ā§ąāĻšāĻžā§° āĻ•ā§°āĻŋ Google PlayāĻ¤ āĻ•āĻŋāĻ¨āĻž āĻ…āĻĄāĻŋāĻ…'āĻŦā§āĻ•āĻ¸āĻŽā§‚āĻš āĻļā§āĻ¨āĻŋāĻŦ āĻĒāĻžā§°ā§‡āĨ¤
āĻ‡-ā§°ā§€āĻĄāĻžā§° āĻ†ā§°ā§ āĻ…āĻ¨ā§āĻ¯ āĻĄāĻŋāĻ­āĻžāĻ‡āĻš
Kobo eReadersā§° āĻĻā§°ā§‡ āĻ‡-āĻšāĻŋā§ŸāĻžāĻāĻšā§€ā§° āĻĄāĻŋāĻ­āĻžāĻ‡āĻšāĻ¸āĻŽā§‚āĻšāĻ¤ āĻĒā§āĻŋāĻŦāĻ˛ā§ˆ, āĻ†āĻĒā§āĻ¨āĻŋ āĻāĻŸāĻž āĻĢāĻžāĻ‡āĻ˛ āĻĄāĻžāĻ‰āĻ¨āĻ˛â€™āĻĄ āĻ•ā§°āĻŋ āĻ¸ā§‡āĻ‡āĻŸā§‹ āĻ†āĻĒā§‹āĻ¨āĻžā§° āĻĄāĻŋāĻ­āĻžāĻ‡āĻšāĻ˛ā§ˆ āĻ¸ā§āĻĨāĻžāĻ¨āĻžāĻ¨ā§āĻ¤ā§°āĻŖ āĻ•ā§°āĻŋāĻŦ āĻ˛āĻžāĻ—āĻŋāĻŦāĨ¤ āĻ¸āĻŽā§°ā§āĻĨāĻŋāĻ¤ āĻ‡-ā§°āĻŋāĻĄāĻžā§°āĻ˛ā§ˆ āĻĢāĻžāĻ‡āĻ˛āĻŸā§‹ āĻ•ā§‡āĻ¨ā§‡āĻ•ā§ˆ āĻ¸ā§āĻĨāĻžāĻ¨āĻžāĻ¨ā§āĻ¤ā§° āĻ•ā§°āĻŋāĻŦ āĻœāĻžāĻ¨āĻŋāĻŦāĻ˛ā§ˆ āĻ¸āĻšāĻžāĻ¯āĻŧ āĻ•ā§‡āĻ¨ā§āĻĻā§ā§°āĻ¤ āĻĨāĻ•āĻž āĻ¸āĻŦāĻŋāĻļā§‡āĻˇ āĻ¨āĻŋā§°ā§āĻĻā§‡āĻļāĻžā§ąāĻ˛ā§€ āĻšāĻžāĻ“āĻ•āĨ¤