GPRS Roaming Guidelines Table of Contents 1.1 Overview......................................................................................................... 4 1.1.1 Scope.............................................................................................................. 4 1.1.2 Architecture and Interfaces............................................................................. 4 1.2 Definition of Terms.......................................................................................... 5 1.3 Document Cross-References......................................................................... 5 3.1 Introduction...................................................................................................... 6 3.2 Inter-PLMN IP backbone network requirements............................................ 6 3.2.1 IP address & routing....................................................................................... 6 3.2.2 DNS................................................................................................................. 6 3.3 Access Point Name (APN)............................................................................. 7 3.3.1 General............................................................................................................ 7 3.3.2 APN Components........................................................................................... 7 3.3.2.1 Overview............................................................................................... 7 3.3.2.2 Network Identifier.................................................................................. 7 3.3.2.3 Operator Identifier................................................................................. 9 3.3.3 Types of APN................................................................................................ 10 3.3.3.1 General................................................................................................ 10 3.3.3.2 Service APN....................................................................................... 10 3.3.3.3 Wildcard APN...................................................................................... 10 3.4 Addressing..................................................................................................... 10 3.4.1 UE Addressing.............................................................................................. 10 3.4.1.1 SS7...................................................................................................... 10 3.4.1.2 IP......................................................................................................... 10 3.4.2 Network Element Addressing....................................................................... 12 3.4.3 The Transition to IPv6................................................................................... 13 3.4.3.1 General................................................................................................ 13 3.4.3.2 Home GGSN Roaming....................................................................... 13 3.4.3.3 Visited GGSN Roaming...................................................................... 14 3.5 PDP Types.................................................................................................... 14 3.5.1 Introduction.................................................................................................... 14 3.5.2 No PDP Context........................................................................................... 14 3.5.3 IPv4 only PDP Context................................................................................. 15 3.5.4 IPv6 only PDP Context................................................................................. 15 3.5.5 IPv4 only PDP Context and IPv6 only PDP Context................................... 16 3.5.6 IPv4 and IPv6 PDP Context......................................................................... 16 4.1 Introduction.................................................................................................... 16 4.2 Control of multiple, concurrent PDP Contexts............................................. 16 4.2.1 Definition........................................................................................................ 16 4.2.2 Recommendations........................................................................................ 17 4.3 Flow Based Charging.................................................................................... 17 4.3.1 Definition........................................................................................................ 17 4.3.2 Recommendations........................................................................................ 18 4.4 Automatic Device Detection......................................................................... 18 4.4.1 Definition........................................................................................................ 18 4.4.2 Recommendations........................................................................................ 18 4.5 Direct Tunnel Functionality........................................................................... 18 4.5.1 Definition........................................................................................................ 18 4.5.2 Recommendations........................................................................................ 19 4.6 SGSN sharing............................................................................................... 19 4.6.1 Definition........................................................................................................ 19 4.6.2 Recommendations........................................................................................ 19 6.1 GTP version 0 and version 1 Interworking Problem..................................... 19 6.1.1 Introduction.................................................................................................... 19 6.1.2 VPLMN solution............................................................................................ 20 6.1.3 HPLMN solution............................................................................................ 20 6.2 IP source address of GTPv1 response messages....................................... 20 6.3 GPRS QoS Classes...................................................................................... 21 Document History...................................................................................................... 22 Other Information....................................................................................................... 22 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