Page 1

Settlement for LBS RoamingMacau

March 22, 2007

Settlement for LBS RoamingMacau

March 22, 2007

Page 2Overview 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

Page 3Review 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

Page 4Review of Transaction-Based Solution

Home operator Visited operatorNetwork connection

AAA

RAN

PDSN

PCF

AAA

RAN

PDSNFA

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

Page 5Settlement 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?

Page 6Strawman 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

Page 7Proposed LBR Fields

Field Size (Bytes)

Description

V-PDE Carrier ID 5 Unique ID for operator of V-PDE (MCC + IMSI_11_12 )

H-PDE Carrier ID 5 Unique ID for operator of H-PDE (MCC + IMSI_11_12)

V-PDE IP Address 4 Public IPv4 address of V-PDE

H-PDE IP Address 4 Public IPv4 address of H-PDE

V-PDE ID 2 Unique ID for V-PDE (specified in transaction protocol)

H-PDE ID 2 Unique ID for H-PDE (specified in transaction protocol)

Date and Time 4 UTC (Universal time code), seconds since 1/1/70

Session ID 2 Associates transactions with a single IS-801 session (specific in transaction protocol)

Transaction ID 2 Unique transaction ID for the individual transaction (specified in transaction protocol)

Message Type 1 Request Assistance Data or Request Location Estimate (specified in transaction protocol)

Response 1 Request Assistance Data, Request Location Estimate, or Reject (specified in transaction protocol). Likely no billing applied to rejected requests.

Page 8Where are LBRs generated?

Home operator Visited operator

AAA

RAN

PDSN

PCF

AAA

RAN

PDSNFA

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

Page 9Transport 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

Page 10Other 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?