Diameter Credit Check Mironov

Information about Diameter Credit Check Mironov

Published on April 17, 2008

Author: Danielle

Source: authorstream.com

Content

Diameter Real-Time Credit Check and Accounting:  Diameter Real-Time Credit Check and Accounting Diameter Acceleration Program Interlink Networks 15 April 2002 Rich Mironov Agenda:  Agenda Speaker introduction RADIUS billing and credit problems iPass RADIUS model Diameter and Credit Control Carrier uses Summary Rich Mironov:  Rich Mironov Principal, Mironov Consulting Strategic product planning Clients in wireless networking, AAA, VPN services, security appliances Early product driver at iPass Senior Director, Product Management Software, billing, quality of service, security, VPN integration Silicon Valley alumnus HP, Tandem, Sybase Disclaimer:  Disclaimer One man’s opinion Not representing clients or previous employers Your input and observations requested RADIUS Billing History:  RADIUS Billing History Ground-breaking for its time Simple service authorization “Approved” or “Rejected” Assumed reliable NAS behavior Exactly one START, one STOP No local time Stretched beyond its design goals Wholesaling Remote billing systems Complex pricing and rating Prepaid services Simultaneous session control RADIUS Billing Challenges:  RADIUS Billing Challenges START and STOP are stateless Retry mechanism creates duplicates Which users are currently connected? Validity of unmatched STOPs Workarounds for local time unreliable Prepaid services Pre-approve a specific amount Real-time rating based on complex factors Third party transactions Service price inquiry, balance check Refunds “!?#*” iPass Model:  iPass Model World’s largest roaming provider 15,000 POPs in 150 countries iPass Settlement System iPass Global Transaction Centers iPass RoamServer Provider’s NAS iPass NetServer Customer’s AAA iPass RADIUS Challenges:  iPass RADIUS Challenges Millions of STARTs, STOPs ~ 200 carriers, PTTs, ISPs Duplicates, unmatched records, overlaps Batch overhead Matching, cleaning, de-duplication No unique identifier Concurrent session identification Refunds and adjustments Potential prepaid overruns Diameter Credit Control Proposal:  Diameter Credit Control Proposal Harri Hakala, et al, March 2002 http://www.ietf.org/internet-drafts/draft-hakala-diameter-credit-control-02.txt Proposes Diameter application for real-time cost and credit control Client Application Service Consumer Service Element Accounting Server Credit Control Server New Credit Control Capabilities:  New Credit Control Capabilities Session-based (reliable Diameter transport) Service Element sends (expected) cost Credit Control Server approves, reserves sufficient credit Service Element confirms final charge amount Credit Control Server may do partial refund Service Element Credit Control Server Prepaid Service Opportunities:  Prepaid Service Opportunities Many ways to avoid “last session overrun” model Pre-priced services Reserve exact credit amount Renewable session services Re-authorize every 90 seconds Typical transaction price Exact amount in final submission One-time events charged in one pass E-purchases, reservations, refunds, flat-rate transactions, directory assistance, driving directions… More Creative Pricing:  More Creative Pricing Service price inquiry and “shopping engines” Allows complex rating and third party service delivery “How much per unit for service-type for customer-ID via channel during time-of-day and day-of-week?” Which remote storage service is lowest cost for 13 GB, max 10 days, encrypted, 2 MB/sec throughput? Complex pricing Frequent Flyer: HighUseGroup2 get first minute free Bundling: Use service B this week and service A is free Specials: 20% off next one or 35% off next six Third parties subsidize service, buy on spot market Benefits:  Benefits More revenue, fewer write-offs Industry estimate of 2% - 5% unbillable sessions Recover $250k/year on $10M product line Confirm customer’s credit status before providing service Price inquiry allows many new rating options Volume purchasing across providers by end customer Time-of-day by service by customer Vary wholesale terms by reseller by service type Auction-style bidding Concurrent users (Diameter) Improves tracking of simultaneous sessions “Shared” accounts with enforceable limits Finer-Grained Policies Possible:  Finer-Grained Policies Possible Four subscriber groups Corporate Platinum, corporate Gold, consumer Silver (usage-based), flat rate consumers Session limits, simultaneous users Platinum: unlimited, up to 20 simultaneous sessions Gold: 4 hours weekday, unlimited weekend, single session Silver: 1.5 hours M-F 7AM-7PM, else 3 hours. 2 simultaneous Flat rate: 20 min M-F, 3 hours weekend, single session only High speed access (ISDN or 802.11b QoS) Platinum: full bandwidth at all times Gold, Silver: 80% of max Mon-Thurs… Need rich set of policy tools Challenges:  Challenges Finished applications Current IETF draft not yet approved, implemented Adoption First uses will be internal to single carrier networks Upgrade NAS, AAA, accounting, billing, SLAs Third party services require adoption of interoperable applications Summary:  Summary Reaching limits of RADIUS accounting Diameter and Credit Check expand possibilities for service delivery, rating, billing Adoption and deployment are next phases Diameter Real-Time Credit Check and Accounting:  Diameter Real-Time Credit Check and Accounting Diameter Acceleration Program Interlink Networks 15 April 2002 Rich Mironov

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