Virtual Roaming Systems for GSM, GPRS and UMTS

Professor Arnaud Henry-Labordere, Ecole Nationale des Ponts et Chaussées, FranceArnaud Henry-Labordere received his Engineering degree from école Centrale de Paris in 1966 and his Ph.D in Mathematics in 1968. He is currently Professor Emeritus of Operations Research at the Ecole Nationale des Ponts et Chaussées, Paris, where he started his teaching career as Associate Professor in Optimization and Mathematical Programming.

• Preface xiiiBy the Same Author xviiiAbbreviations and Acronyms xix1 ‘Virtual Roaming’ Purpose and Principles 11.1 Mobile Services Affected by Virtual Roaming 11.2 Virtual Roaming Hub for Inbound Visitors’ Service (Single IMSI) 21.3 Virtual Roaming Hub for Outbound Subscribers: Multi-IMSI 71.4 Brief Introduction to Standard Bilateral Roaming Procedures 91.5 Principles of the SS7 Protocol Layers Used in Roaming Procedures 102 Architecture of Virtual Roaming Systems 152.1 SCCP, MAP, CAP and GTP Transformation Principle in the Roaming Hub 152.2 Procedures for the Virtual Roaming Visitors’ Service (Single IMSI) 162.3 Restriction of Virtual Roaming by the Roaming Hub 292.4 Procedures for the Virtual Roaming Visitors’ Service (Multi-IMSI) 312.5 IS 41 ↔ƒnMAP GSM Inter-standard Roaming Hubs 372.6 Various MAP and CAMEL Transformation Methods 392.7 Appendix of Chapter 2 41References and Further Reading 483 Connecting the VPLMN MNOs to a Virtual Roaming Supplier 513.1 MNO Configuration vs Roaming Hub Supplier Configuration 513.2 Connection to the Roaming Hub Service, MNO Point of View: Using the ‘Alias GT’ Method 513.3 Details of E212 →ƒnE214 MNO Configuration with the GT Translation Methods 533.4 Connection to the Roaming Hub Service, MNO Point of View: Using the ‘MTP Transparent Tunnelling’ Method 543.5 Roaming Hub Supplier Point of View: Different Modes of Connection of the MNO Clients 543.6 Implementation of a Roaming Hub with Several Point Codes 573.7 SS7 Stack Architecture for a Robust Integrated System with Several Point Codes 613.8 SIGTRAN Introduction and Practical Configuration 633.9 Standard MTP3 Load Distribution Algorithm 663.10 SCCP Class 1 (Sequenced Connectionless Protocol) 68References and Further Reading 694 Networks of Roaming Hubs and SMSeXchanges 714.1 Cooperation of Several Roaming Hubs 714.2 Problem Raised by Mobile Number Portability (MNP) 714.3 Use of the TCAP Dialogue Part to Provide an End-To-End Routing Capability 74References and Further Reading 775 Hosted Roaming Hubs with Virtual GTs 795.1 Purpose 795.2 TCAP Dialogue Implementation Constraints 79References and Further Reading 846 Location-based Services and Virtual Roaming 856.1 Traces Show How an SMLC Really Works 856.2 ‘Spyware Measurements’ in the Handset 866.3 Network MAP-based Location Obtaining Methods: Prerequisites 916.4 Simple BSS-based SMLC Architecture Using the Mobile TA and Measurements 1006.5 Details of a More Accurate Positioning Method: A-GPS 1066.6 The Enhanced Time Difference (E-OTD) Method: Hyperbola Intersections 1106.7 Annex: Execution of the Algorithm for Position Computation with the ‘Measurement Reports’ or E-OTD 112References and Further Reading 1157 Roaming Costs or Inter-operator Traffic Charge Suppression Systems, and Other Service Improvements 1177.1 VMS Anti-tromboning: Large Financial Savings in GSM and UMTS 1177.2 Call Back and Local Calls Optimization 1247.3 Dialled Number Correction with CAMEL 128References and Further Reading 1298 SIM Cards ‘Over The Air’ Provisioning 1318.1 Principles of SIM OTA Using SMS: Download and Upload 1318.2 OTA SIM Provisioning Interface Examples 1378.3 Coding the Binary Payload to Download (Write) and Upload (Read) Files of8.4 Coding the Binary Payload to Download (Write) and Upload (Read) Data of the SIM Card (Access with Applet File Manager) 1548.5 Coding a Binary Payload Which Triggers the Execution of a Remote SIM Tool Kit (Using the Applet File Manager) 1548.6 More Details on OTA Formats 1558.7 Details for the Upload of a Big SIM Address Book (Multiple Entries) Using Concatenated SMS 1608.8 Security Keys, How to Use the Card Vendor Provided Data 163References and Further Reading 1649 Handset ‘Over The Air’ Provisioning of GPRS Profiles, Automatic Device Management 1679.1 The Data Access Path in GSM: Purpose of GPRS Profile Settings 1679.2 Obtaining the IMEI of a Handset for Device Management 1689.3 Method to Remotely Check that a Loaded GPRS Profile Works 1729.4 Architecture of a Classical OTA GPRS Server 1739.5 Stochastic Automatic GPRS Profile Type Learning OTA Server 1749.6 Stochastic Convergence 1769.7 Best Order to Try an Unknown Handset GPRS Profile Type 177References and Further Reading 17810 Current Developments and Directions: GSM-UMTS ↔ƒnVoIP Roaming 17910.1 Pirate Techniques? 17910.2 Seamless ‘Free Roaming’? GSM-UMTS with SS7 ↔ƒnVoIP Gateways 18010.3 Attracting the Visitors and Forcing Them to Roam Immediately in a Given VPLMN 18410.4 IMS, the all IP Network Architecture 18610.5 Making a 4G ‘IP Call’ to a Mobile 187References and Further Reading 18911 Worked-out Examples 19111.1 Examples of Chapter 1 19111.2 Examples of Chapter 3: Roaming Hub with Several Point Codes 21511.3 Examples of Chapter 4 221Index 303