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Preface | |
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Acknowledgements | |
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List of Abbreviations | |
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Background | |
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VoLTE Deployment Strategies | |
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Common Networks Everywhere | |
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GSM/WCDMA View | |
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CDMA View | |
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VoLTE System Architecture | |
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Overview | |
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LTE Radio | |
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LTE Radio Background | |
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LTE Radio Architecture | |
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Evolved Packet Core | |
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What is the Evolved Packet Core? | |
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EPC Entities and Functionalities | |
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EPS Mobility Management | |
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EPS Session Management and QoS | |
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Control | |
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What is an IP Multimedia Subsystem? | |
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IMS Development History | |
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IMS Fundamentals | |
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IMS Entities | |
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Home Subscriber Server | |
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Policy and Charging Rule Function | |
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Summary | |
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VoLTE Functionality | |
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Overview | |
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Radio Functionalities | |
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Bearers and Scheduling | |
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Mobility | |
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Circuit Switched Fallback Handover | |
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Mobility from 2G/3G Back to LTE | |
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Power Saving Features | |
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Positioning Solutions | |
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UE Radio Access Capabilities for VoLTE | |
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EPC Functionalities | |
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LTE subscriber identification | |
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PDN Connectivity Establishment for the VoLTE User | |
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EPS Dedicated Bearer Setup | |
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IMS Identification | |
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IP Multimedia Services Identity Module | |
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Public User Identity | |
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Private User Identity | |
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Relationship between Private and Public User Identities | |
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Identification of User's Device | |
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Identification of Network Entities | |
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Identification of Services (Public Service Identities) | |
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Identification Without ISIM | |
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IMS Service Provisioning | |
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Enforcement of Allowed Services | |
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Service-Triggering Information | |
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Selection of AS | |
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AS Behaviour | |
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Service Provisioning in Action | |
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IMS Multimedia Telephony | |
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Introduction | |
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Multimedia Communication | |
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Supplementary Services | |
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VoLTE End to End and Signalling | |
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Overview | |
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VoLTE Subscription and Device Configuration | |
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EPS Attach for CSFB/IMS VoIP and Default Bearer Activation | |
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IMS Registration | |
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Constructing the REGISTER Request | |
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From the UE to the P-CSCF | |
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From the P-CSCF to the I-CSCF | |
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From the I-CSCF to the S-CSCF | |
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S-CSCF Challenges the UE | |
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UE's Response to the Challenge | |
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Registration at the S-CSCF | |
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The 200 (OK) Response | |
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Third-Party Registration to Application Servers | |
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Subscription to Registration Event Package | |
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Re-Registration and Re-Authentication | |
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De-Registration | |
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Related Standards | |
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IMS VoIP Session | |
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Constructing the INVITE Request | |
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Routing | |
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Media Negotiation | |
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Media Resource Reservation and Policy Control | |
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Charging | |
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Session Release | |
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Related Standards | |
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Voice Continuity | |
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PS-PS Intersystem Handover | |
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Single Radio Voice Call Continuity | |
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Summary | |
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IMS Emergency Session | |
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PDN Connection Setup for Emergency Session | |
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Emergency Registration | |
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Emergency Session | |
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CS Fallback for Evolved Packet System Call Case(s) | |
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Architecture of CS Fallback for EPS | |
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Description of SGs Interface | |
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Idle Mode Signalling Reduction and Use of CS Fallback for EPS | |
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Idle Mode versus Active Mode UE with CS Fallback for EPS | |
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CS Fallback Attachment | |
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Mobile Originating Call Using CSFB | |
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Mobile Terminating Call Using CSFB | |
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Call Unrelated CSFB Procedures | |
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Mobile Terminating Roaming Retry and Forwarding | |
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Summary | |
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VoLTE Messaging | |
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Native IMS Messaging | |
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SMS Interworking | |
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Multimedia Messaging Service | |
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Unstructured Supplementary Services Data Simulation in IMS | |
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Summary | |
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IMS Centralized Services | |
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VoLTE Radio Performance | |
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Coverage | |
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Capacity | |
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Latency | |
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Summary | |
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HSPA Voice over IP | |
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References | |
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Index | |