Roaming Techology

Topics: Domain Name System, IP address, Private network Pages: 24 (5975 words) Published: August 29, 2013
GSM Association
Permanent Reference Document:
IR.33
Unrestricted - Industry
IR33 Version 3.2.0 Page 1 of 15
PRD IR.33
Title GPRS Roaming Guidelines
Version 3.2.0
Date 3rd April 2003
GSM Association Classifications
Non-Binding
Core
Security Classification Category:
Unrestricted – Industry X
Information Category Roaming - Technical
Unrestricted
This document is subject to copyright protection. The GSM MoU Association (“Association”) makes no representation, warranty or undertaking (express or implied) with respect to and does not accept any responsibility for, and hereby disclaims liability for the accuracy or completeness or timeliness of the information contained in this document. The information contained in this document may be subject to change without prior notice. Access to and distribution of this document by the Association is made pursuant to the Regulations of the Association.

© Copyright of the GSM Association 1999
GSM Association
Permanent Reference Document:
IR.33
Unrestricted - Industry
IR33 Version 3.1.0 Page 2 of 15
Document History
Version Date Brief Description
0.0.1 22.06.1999 Table of Contents presented at IREG GPRS #4 meeting and commented upon
0.0.2 20.08.1999 First draft of document for IREG GPRS group discussion (5th Meeting)
1.0 21.09.1999 Issued First Version for approval
1.0.1 22.09.1999 Modified Section 8.2 for approval
2.0.0 23.09.1999 Approved by IREG#37
3.0.0 October 1999 PL Doc 162/99. Approved at Plenary 42
3.1.0 27th April 2000 CR#01, PL Doc 032/00 approved at Plenary 43 3.2.0 3th April 2003 SCR 02
Changes Since Last Version
Addition of DNS security improvement recommendations
Summary
This document aims to provide a standardised view on how GPRS networks can interwork in order to provide GPRS roaming capabilities when users roam onto foreign networks. It will make references to current ETSI GSM specifications for GPRS, and also other GSM Association document where necessary.

This document should be used in conjunction with two other IREG GPRS documents; PRD IR.34 & IR.35.
Also documents generated by SERG and BARG are referenced in this document. GSM Association
Permanent Reference Document:
IR.33
Unrestricted - Industry
IR33 Version 3.1.0 Page 3 of 15
1. INTRODUCTION.......................................................................................................................................................4 1.1. MS REGISTRATION AND CONTEXT ACTIVATION OVERVIEW ................................................................4 2. ROAMING SCENARIOS .........................................................................................................................................5 2.1. SCENARIO 1 - MS REGISTERED ON VPLMN USING VSGSN AND HGGSN...............................................5 2.2. SCENARIO 2 - MS REGISTERED ON VPLMN USING VSGSN AND VGGSN................................................5 3. ROAMING INTERFACES AND PROTOCOLS ..................................................................................................6 4. GPRS AND THE DOMAIN NAME SYSTEM - DNS............................................................................................6 4.1. DNS INTRODUCTION.......................................................................................................................................6 4.2. GPRS AND DNS.................................................................................................................................................7 4.3. DNS QUERYING WHILST ROAMING...............................................................................................................7 4.3.1. Roaming Scenario 1 (HGGSN used) DNS Querying............................................................................8 4.3.2. Roaming Scenario 2 (VGGSN used) DNS Querying .........................................................................12 4.4. THE ACCESS POINT NAME -...
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