Location Based Service Roaming

1. Location Based Service Roaming June 2006 KDDI Masaru Umekawa KDDI Confidential Proprietary

2. Present situation • Location-based service (LBS) is very popular • e.g. friend finder, personal navigation, stolen property recovery mapping, restaurant guides… • Over 50 operators worldwide have launched LBS in the past years What is the fact about LBS roaming? • No one has not achieved LBS roaming • Various options and some challenges hold up LBS roaming KDDI Confidential Proprietary

3. Architecture • Control Plane architecture • Designed to address the FCC’s E911 mandate in U.S. • Positioning activities in the background of the voice call • LBS roaming is available if the visited network has also deployed the control plane solution • User Plane architecture • Designed for various location applications (in non-emergency use) • Not support concurrent voice calls with positioning activities • Mandates that the mobile always interacts with the home servers  Difficult part KDDI Confidential Proprietary

4. User plane deployments Market needs preceded formal standardization, resulting in multiple proprietary solutions in the marketplace • Early CDMA user plane networks are proprietary • Several pre-standard UP solutions have been defined • KDDI, SKT, and VZW* • Pre-SUPL in VFKK (WCDMA)* • Growing convergence on the V1/V2 specs • QUALCOMM provided an architectural design work and released the official UP solution • Deployed by China Unicom, Hutch Thailand, Sprint and Vivo* • Enabled international roaming • May be thought of as a de facto standard • Endorsed by the CDG *Information source : Qualcomm “Location Services Solutions, Now and the Future”, BREW 2006 Conference KDDI Confidential Proprietary

5. UP solutions X.S0024 & SUPL • 3GPP2 is going to publish a formal CDMA user plane standard known as X.S0024* *withholding publication pending the resolution of current restrictions on OMA Normative referencing • Very similar to the V1 and V2 architecture • Key companies in 3GPP led the effort to produce a complete UP solution and produced OMA’s secure user plane for location (SUPL) • SUPL can be used for our CDMA2000 • If we decide to move off our legacy V1/V2 or V1/V2-like solutions in use today, we will need to decide between X.S0024 and SUPL (Long solution) KDDI Confidential Proprietary

6. One possible solution • A mediation solution between different spec might be a possible solution GPS Gateway Server (MPC) Positioning Server (PDE) BS DB Home Network Mediation Server Visited Network BS DB Positioning Server (PDE) Gateway Server (MPC) Roamer GPS KDDI Confidential Proprietary

7. Serving operator has to allow roamers to access their positioning servers (PDE). Little case to allow roamers to their application servers; This differs from the previous data roaming service (e.g E-mail, WAP browsing) Similar to the DNS access Security Policy MPC-MPC H-MPC S-MPC MS-MPC Homer Home Operator PDSN Roamer IS-801 Serving Operator PDE KDDI Confidential Proprietary

8. Security Policy • In the Mobile IP case, traffics loop back to Serving NW • FW in front of the PDE has to permit the roamer’s Home IP addresses • No small impact on the network security policy MPC-MPC H-MPC S-MPC MS-MPC HA PDSN Roamer Home Operator IS-801 Serving Operator PDE KDDI Confidential Proprietary

9. Digital map • The latitude and longitude need to be related on a map • Assume customers would like to access the familiar contents sites in their home NW • Home contents providers should offer the digital map of foreign countries • Create maps out of nothing • Buy local maps from the local contents provider • Change the language • Regulation differences in each country • Some countries don't allow to put digital map contents on servers in other countries KDDI Confidential Proprietary