VoLTE and ViLTE. Voice and Conversational Video Services over the 4G Mobile Network #955496

Автор:
Жанр:
Зарубежная образовательная литература
Агент:
John Wiley & Sons Limited (prof) EUR
Формат:
PDF книга
Объем:
339 стр
Язык:
английский
Правообладатель:
John Wiley & Sons Limited
Аннотация:

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.

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