1x EV-DO Roaming Issues

1. 1x EV-DO Roaming Issues June 18, 2004 Bryan Kim kkh0623@nate.com Network R&D Center SK Telecom

2. Table of Contents • 1x EV-DO Network Configuration • 1x EV-DO Roaming Issues • Action Items

3. 1x EV-DO Alternative Reference Model (IS-878)

4. HLR SMC SCP CDMA2000 1X Voice Network VMS SS7 IP PSTN CGS MSC/VLR BTS/ANTS BSC/ANC PDA IWF SCN VT Server BTS/ANTS Internet Notebook AT Gateway Router IP Phone PDSN BSC/ANC HA IP Fax BTS/ANTS RADIUS Server Video Phone AN-AAA 1x EV-DO + 1X Data Network 1x EV-DO Network Configuration (SK Telecom)

5. 1x EV-DO Roaming Call Flow (Assumption : AN-AAA Implementation) Serving AAA AT Serving ANC/PCF Serving AN-AAA Home AN-AAA Home AAA Serving PDSN UATI Request UATI Assignment UATI Complete Session Establishment AT ready to exchange data on Access Stream PPP and LCP Nego CHAP Challenge - Response Access Request Access Request Access Accept (containing MN ID) Access Accept (containing MN ID) AT ready to exchange data on Packet Service Stream

6. AT Serving AN/PCF Serving AN-AAA Serving PDSN Serving AAA Home AN-AAA Home AAA Registration Request Registration Reply LCP configuration Req/Res CHAP Challenge CHAP Response Access Request Access Request Access Accept Access Accept IPCP Configuration Req/Res Account Start Account Start Transmitting packet data to internet 1x EV-DO Roaming Call Flow(cont.)

7. 1x EV-DO Roaming Issues □ AN-AAA Interoperability - IS-878 says “If terminal authentication is not used by an HRPD system, the MN ID that is used by the PCF on the A10/A11 interface is determined by other means beyond the scope of this specification” - Without AN-AAA in the 1x EV-DO network, it may need change in PCF or terminal and affect 1x EV-DO roaming □ 1x EV-DO PRL Update □ Terminal Interoperability

8. Action Items □ Who want to be volunteers for trial? - Operators who implemented AN-AAA - Operators who did not implement AN-AAA

9. Questions & Answers June 18, 2004 Bryan Kim kkh0623@nate.com Network R&D Center SK Telecom