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Service Differentiation in Residential Broadband Networks

CICT Conference Presentation VoIP - Potentials and Challenges, Drivers and Barriers. Service Differentiation in Residential Broadband Networks. Lyngby, November 5, 2004 Halldór Matthías Sigurðsson (halldor@cti.dtu.dk). Motivation. CURRENT. FUTURE. TV. TV. INTERNET. INTERNET. Modem

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Service Differentiation in Residential Broadband Networks

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  1. CICT Conference Presentation VoIP - Potentials and Challenges, Drivers and Barriers Service Differentiation in Residential Broadband Networks Lyngby, November 5, 2004 Halldór Matthías Sigurðsson (halldor@cti.dtu.dk) Service Differentiation in Residential Broadband Networks

  2. Motivation CURRENT FUTURE TV TV INTERNET INTERNET Modem CPE Modem CPE PSTN PSTN • Moving from several dedicated networks to converged multipurpose networks Service Differentiation in Residential Broadband Networks

  3. Motivation • Real-time communication (voice and video) pose timing constraints and end-to-end QoS Requirements Service Differentiation in Residential Broadband Networks

  4. Resource Management • Over provisioning • Provide more than you need • Loose Control • Prioritise certain traffic • Strict Admission • Resource Reservation • Near future solution will be based on a combination of over provisioning and loose control Service Differentiation in Residential Broadband Networks

  5. ACCESS NETWORK AGGREGATION NETWORK BRAS SECOND MILE FIRST / LAST MILE DSL Components ISP BRAS ISP DSLAM DSLAM CPE CPE INTERNET ISP • +/- 2300 subscribers • Copper wires • DSLAM • Aggregation Network • BRAS Service Differentiation in Residential Broadband Networks

  6. BRAS Current DSL Architecture ACCESS NETWORK AGGREGATION NETWORK ISP ISP DSLAM CPE INTERNET ISP • Data centric • Oversubscription • Lack of Resource Management Service Differentiation in Residential Broadband Networks

  7. Intra Domain Inter Domain Internet • Intra Domain • Walled Garden Model • Based on offering all services internally • Example: Telephony and Satelite Industry • Inter Domain • Gated Garden Model • Based on profit sharing / Service level Agreements • Example: NTT DoCoMo’s I-mode • Internet • Public Garden Model • Lack of business models • Example: Internet services Levels of Competition ISP BRAS ISP DSLAM CPE INTERNET ISP Service Differentiation in Residential Broadband Networks

  8. Internet • Intra Domain • Inter Domain Competition among Service Providers Intra DomainVoice Inter DomainVoice InternetVoice ISP BRAS ISP DSLAM CPE INTERNET ISP Intra Domain Video Inter Domain Video InternetVideo Service Differentiation in Residential Broadband Networks

  9. BestEffort Scenario 1Best Effort Intra DomainVoice Inter DomainVoice InternetVoice ISP BRAS ISP DSLAM CPE INTERNET ISP Intra Domain Video Inter Domain Video InternetVoice • Current Situation • Internet / Public Garden Model • Network Access Provider must rely on income from transmission • No QoS - Voice, video and data compete for resources • Transmission characterised by bottlenecks and TCP Service Differentiation in Residential Broadband Networks

  10. Priority BestEffort Scenario 2One Way Service Differentiation Intra DomainVoice Inter DomainVoice InternetVoice ISP VoIP BRAS ISP DSLAM HAN CPE INTERNET STB ISP Intra Domain Video Inter Domain Video InternetVoice • Upgrade in BRAS (Same DSLAM and CPE) • Downstream Prioritising – Upstream Competition • Supports VoIP and VoD – Not television broadcasting • Competing Service Providers are worse off Service Differentiation in Residential Broadband Networks

  11. Priority BestEffort Scenario 3Port Based Service Differentiation Intra DomainVoice Inter DomainVoice InternetVoice ISP VoIP BRAS CPE ISP DSLAM HAN INTERNET STB ISP Intra Domain Video Inter Domain Video InternetVoice • New CPE, DSLAM upgrade • Port based prioritisation • Supports VoIP, VoD and broadcast television • Intra Domain / Walled Garden Model • Discriminates Inter and Internet Service Providers Service Differentiation in Residential Broadband Networks

  12. Priority BestEffort Scenario 4Content Based Service Differentiation Intra DomainVoice Inter DomainVoice InternetVoice ISP VoIP BRAS CPE ISP DSLAM HAN INTERNET STB ISP Intra Domain Video Inter Domain Video InternetVoice • New CPE, DSLAM upgrade • Two way content based service differentiation • Supports VoIP, VoD and broadcast television • Inter Domain / Gated Garden Model • Operators can choose which third party operators to allow access Service Differentiation in Residential Broadband Networks

  13. Conclusion • Residential Broadband Networks are moving towards converged voice, video and data transmission • Operators are moving towards service differentiation • Most likely path requires new equipment (both at customer and operator) • Operators will choose a migration strategy that grants the market control • Network Access Providers can discriminate competing service providers Service Differentiation in Residential Broadband Networks

  14. Questions Service Differentiation in Residential Broadband Networks

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