1. Page 1 Settlement for LBS User Plane Roaming LBS Roaming Meeting, Denver January 18, 2007 Settlement for LBS User Plane Roaming LBS Roaming Meeting, Denver January 18, 2007

2. Page 2 Overview of Settlement Refers to financial settlement between operators Remuneration for services provided to inbound roamers Currently performed between operators for packet data roaming. Settlement charges are calculated by the kilobyte. Operators indicated this will be a requirement for LBS roaming LBS roaming will consume V-PDE resources In many cases, LBS roaming volumes between operators will be asymmetrical This slide deck investigates LBS roaming settlement for the “remote transaction solution” for user plane LBS roaming

3. Page 3 Review of CRXs CDMA Roaming eXchange Providers (CRXs) Facilitate packet data roaming Provide a central exchange point for IP data traffic, settlement and other value adds Most operators use CRX services RSPs/CRXs: Aicent, Syniverse, VeriSign

4. Page 4 Review of Transaction-Based Solution Home operator Visited operator Network connection AAA RAN PDSN PCF AAA RAN PDSN FA H-PDE HA V-PDE IS-801 traffic H-PDE detects the MS is roaming and sends IS-801 primitive service requests to V-PDE. RPC-like interface CRX or Internet CRX or Internet RPC-like interface that enables a transaction-based service MIP/L2TP tunnel PCF Currently being considered for user plane roaming solution Requires inbound roamer use of V-PDE resources via the H-PDE Visited operator requires payment for use of V-PDE resources

5. Page 5 Settlement Considerations What information is required for billing? New LBS Billing Record required (LBR) Which elements create/capture LBRs? Created by PDEs, CRX, or both? Commercial considerations Transport costs of Inter-PDE protocol LBS services included in roaming agreement? How often is settlement performed? Financial clearing?

6. Page 6 Strawman Location Billing Record (LBR) Strawman specifically designed for remote transaction solution Strawman is based on proposed inter-PDE protocol Assumes: Billing/Settlement are performed on a per transaction basis Operators want details of each PDE transaction Summaries can be generated using LBRs on a periodic basic, e.g. monthly No LBR generated for keep alive messages Detailed logs will also be available on PDEs – possible that LBRs are generated from logs

7. Page 7 Proposed LBR Fields FieldSize (Bytes) Description V-PDE Carrier ID5Unique ID for operator of V-PDE (MCC + IMSI_11_12 ) H-PDE Carrier ID5Unique ID for operator of H-PDE (MCC + IMSI_11_12) V-PDE IP Address4Public IPv4 address of V-PDE H-PDE IP Address4Public IPv4 address of H-PDE V-PDE ID2Unique ID for V-PDE (specified in transaction protocol) H-PDE ID2Unique ID for H-PDE (specified in transaction protocol) Date and Time4UTC (Universal time code), seconds since 1/1/70 Session ID2Associates transactions with a single IS-801 session (specific in transaction protocol) Transaction ID2Unique transaction ID for the individual transaction (specified in transaction protocol) Message Type1Request Assistance Data or Request Location Estimate (specified in transaction protocol) Response1Request Assistance Data, Request Location Estimate, or Reject (specified in transaction protocol). Likely no billing applied to rejected requests.

8. Page 8 Where are LBRs generated? Home operator Visited operator AAA RAN PDSN PCF AAA RAN PDSN FA H-PDE HA V-PDE CRX or Internet CRX or Internet PCF Likely that H-PDE and V-PDE will generate LBRs (good check and balance) CRX could provide “proxy” for transaction protocol CRX would have visibility to protocol and could generate LBRs CRX could also perform settlement in this case Could be slight difference in timestamp on generated LBRs

9. Page 9 Transport costs of transactions Operators pay CRXs and Internet providers for data inter-operator data traffic (mostly user data) Inter-PDE transactions will require a small amount of transported data (and charge?) between operators Possibly negligible amounts? CRXs could identify inter-PDE traffic volumes and provide settlement

10. Page 10 Other commercial considerations Currently, a roaming agreement contract for PD data roaming exists between operators Roaming agreement modified to include LBS service charges? Settlement process to mirror PD roaming settlement process? Use CRX for financial settlement?