Tabla de Contenidos: “…Finding elements by tag name; 2.5.3. Traversing a document tree; 2.5.4. Node types; 2.5.5. …”

Tabla de Contenidos: “…-- 1.4 Relation between IMS and non-IMS Services -- 2 The History of the IMS Standardization -- 2.1 Relations between IMS-related Standardization Bodies -- 2.3 Third Generation Partnership Project -- 2.4 Third Generation Partnership Project 2 -- 2.5 IETF-3GPP/3GPP2 Collaboration -- 2.6 Open Mobile Alliance -- 3 General Principles of the IMS Architecture -- 3.1 From Circuit-switched to Packet-switched -- 3.2 IMS Requirements -- 3.3 Overview of Protocols used in the IMS -- 3.4 Overview of IMS Architecture -- 3.5 Identification in the IMS -- 3.6 SIM, USIM, and ISIM in 3GPP -- 3.7 Next Generation Networks (NGN) -- Part II The Signaling Plane in the IMS -- 4 Session Control on the Internet -- 4.1 SIP Functionality -- 4.2 SIP Entities -- 4.3 Message Format -- 4.4 The Start Line in SIP Responses: the Status Line -- 4.5 The Start Line in SIP Requests: the Request Line -- 4.6 Header Fields -- 4.7 Message Body -- 4.8 SIP Transactions -- 4.9 Message Flow for Session Establishment -- 4.10 SIP Dialogs -- 4.11 Extending SIP -- 4.12 Caller Preferences and User Agent Capabilities -- 4.13 Reliability of Provisional Responses -- 4.14 Preconditions -- 4.15 Event Notification -- 4.16 Signaling Compression -- 4.17 Content Indirection -- 4.18 The REFER Method -- 4.19 Globally Routable User- Agent URIs (GRUU) -- 4.20 NAT Traversal -- 5 Session Control in the IMS -- 5.1 Prerequisites for Operation in the IMS -- 5.2 IPv4 and IPv6 in the IMS -- 5.3 IP Connectivity Access Network -- 5.4 P-CSCF Discovery -- 5.5 IMS-level Registration -- 5.6 Subscription to the reg Event State -- 5.7 Basic Session Setup -- 5.8 Application Servers: Providing Services to Users…”