The Internet Protocol Detail Record OrganizationPresentation Transcript
IPDR & WiFi: Circumference AAAS: Unified A uthentication A uthorization, A ccounting, and S ettlement Prepay, Roaming, Settlement for Next-Generation Services Aron Heintz, President [email_address]
IPDR in a Nutshell
Nonprofit supported by 44 companies from North & South America, Europe, Asia.
Combined member market cap. > $100 Billion.
Mission: To reduce the time and cost of usage measurement and exchange for next-generation services.
Formed Q3 1999; final NDM-U specification issued Q4 2001
2/3 of OSS/BSS vendors now IPDR Compliant
Crossroads for WiFi Roaming ~ Late 2004
“ Proprietary Roaming ”: Two or three major service providers each offer their proprietary WiFi roaming infrastructure and billing models. Hotspot providers must align with one or the other; cross-network roaming is incompatible.
“ Universal Roaming ”: All parties have converged on a roaming AAAS standard . Universal WiFi roaming is taken for granted, including a variety of pricing/payment models.
WiFi Home Adoption – now 13%
Roam Adoption depends on Public Access Growth
Key determinant: number of accessible hotspots
Previous examples of “island technology” failures: 1G cellular roaming, 3G applications, Macintosh OS…
“ Proprietary roaming”: ~ 2x Growth Curve
Road warriors will pick their two favorite providers; Many home users won’t roam.
Many venues won’t bother becoming access points
“ Circumference roaming”: ~ 4x Growth
Revenue to Home/Restaurant LAN providers inspires rapid hotspot proliferation
Enterprise and road warrior “killer applications” emerge using pervasive WLAN.
Rationale for 2.5G/3G/WLAN roaming becomes convincing
Sounds nice, how? Proven technology already on hand…
WiFi Circumference Example Other configurations support bilateral and non-proxied multilateral
NDM-U Reference Model - Interfaces
A – Unspecified in NDM-U, typically proprietary to SE, mediated by IR
B – Stream of IPDRs, flowing to either IT, IS, or both
C – Stream of IPDRDocs
D – Groups of IPDRDocs, accessed either via file-based transport or as transactions in an online protocol
E – Groups of IPDRDocs, modified by the application of business rules
Radius & Diameter Accounting Shortcomings
Fragmented, inefficient Accounting transfers
Request-reply “pulse” of messages only
No support for batches
How do you describe what happened later on?
Unspecified message contents
Vendor Specific Attributes are where most of the important accounting data is!
Nonstandardized extensions – most vendor makes up their own
Radius & Diameter plus: NDM-U Accounting
NDM-U offers an industry-standard log format for accounting data.
Delivers a batch-oriented extension for AAAccounting
Majority of billing and settlement players are already compliant
XML flavor read/writeable by any software vendor
Binary encoding for high-performance apps
“ Service Specifications” - Detail record definition language fully supports VSAs
EZ upgrade for Radius vendors -- Less than 2 weeks of work with IPDR source code.
The Model Driven IPDR Approach Service Data Encoding Service Data Transport
(Subset of W3C XML-Schema 1.0)
Alternative Encodings :
XDR based binary encoding
Others (e.g. RADIUS, Diameter AVP)
Alternative Transports :
File based exchange (of XML or XDR)
Streaming (XDR only)
Others (e.g. RADIUS UDP, Diameter TCP/SCTP)
Service Definition Service Definition Information Model
Many application-specific protocols exist: TAP, EMI, OSP, BAF, CIBER, etc. Application: Voice
TAP3, MXP may offer workable solutions, but aren’t widely deployed.
The attributes of NDM-U 3.1.1 accounting capabilities are directly applicable to IP roaming settlement:
tools for moving accounting and performance data; flow of this information is basically unidirectional .
Adequately and efficiently addresses post pay for a transaction that has already been authorized and completed
Permits Radius/Diameter accounting post-hoc exchange with minimal development effort
Sounds nice, who? A win-win coalition of leading players…
IPDR and WiFi roaming: Sensible win-win-win
WiFi SP’s and Vendors : Bigger overall market. Customers respond to overall number of accessible hotspots. Seamless roaming is a key adoption driver.
Settlement Providers : Increase settlement revenues with increased user base.