lyngby, november 5, 2004 halldór matthías sigurðsson service differentiation in residential...
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Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 1
Service Differentiation in Residential Broadband Networks
Lyngby, November 5, 2004Lyngby, November 5, 2004
Halldór Matthías Sigurðsson ([email protected])
CICT Conference PresentationCICT Conference Presentation
VoIP - Potentials and Challenges, Drivers and Barriers
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 2
Motivation
INTERNET
PSTN
ModemCPE
INTERNET
PSTN
ModemCPE
TV TV
CURRENT FUTURE
• Moving from several dedicated networks to converged multipurpose networks
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 3
Motivation
• Real-time communication (voice and video) pose timing constraints and end-to-end QoS Requirements
Err
or
tole
ran
ce
Delay Tolerance
low
high
Low High
Web browsing File transfer
Broadcast TV Video surveil.
Voice Video conf.
Real-Time
Data
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 4
Resource Management
• Over provisioning– Provide more than you need
• Loose Control– Prioritise certain traffic
• Strict Admission– Resource Reservation
INTERNET
PSTN
ModemCPE
TV
• Near future solution will be based on a combination of over provisioning and loose control
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 5
DSL Components
• +/- 2300 subscribers• Copper wires• DSLAM• Aggregation Network• BRAS
CPE
BRAS
DSLAM ISP
ISP
ISP
INTERNET
AGGREGATION NETWORK
SECOND MILE
ACCESSNETWORK
FIRST / LAST MILE
CPE
DSLAM
BRAS
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 6
Current DSL Architecture
• Data centric• Oversubscription• Lack of Resource Management
ISP
ISP
ISP
INTERNET
AGGREGATION NETWORK
ACCESSNETWORK
DSLAM
BRAS
CPE
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 7
CPE
Levels of Competition
ISP
ISP
ISP
INTERNET
DSLAM
BRAS
Internet
• Internet– Public Garden Model– Lack of business models – Example: Internet
services
Inter
Domain
• Inter Domain– Gated Garden Model– Based on profit sharing /
Service level Agreements– Example: NTT DoCoMo’s
I-mode
• Intra Domain– Walled Garden Model– Based on offering all
services internally– Example: Telephony
and Satelite Industry
Intra Domain
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 8
Internet
Video
Internet
VoiceInter Domain
Voice
Inter Domain
Video
Competition among Service Providers
ISP
ISP
ISP
INTERNETCPE
DSLAM
BRAS
Intra Domain
Voice
Intra Domain
Video
• Intra Domain • Inter Domain • Internet
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 9
Internet
Voice
Internet
VoiceInter Domain
Voice
Inter Domain
Video
Scenario 1
Best Effort
• 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
ISP
ISP
ISP
INTERNETCPE
DSLAM
BRAS
Intra Domain
Voice
Intra Domain
Video
BestEffort
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 10
Internet
Voice
Internet
VoiceInter Domain
Voice
Inter Domain
Video
Scenario 2
One Way Service Differentiation
ISP
ISP
ISP
INTERNETCPE
DSLAM
BRAS
Intra Domain
Voice
Intra Domain
Video
• Upgrade in BRAS (Same DSLAM and CPE)• Downstream Prioritising – Upstream Competition• Supports VoIP and VoD – Not television broadcasting• Competing Service Providers are worse off
HAN
VoIP
STB
Priority
BestEffort
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 11
Internet
Voice
Internet
VoiceInter Domain
Voice
Inter Domain
Video
Scenario 3
Port Based Service Differentiation
ISP
ISP
ISP
INTERNET
BRAS
• New CPE, DSLAM upgrade• Port based prioritisation• Supports VoIP, VoD and broadcast television• Intra Domain / Walled Garden Model• Discriminates Inter and Internet Service Providers
HAN
VoIP
STB
Intra Domain
Video
Intra Domain
Voice
CPE DSLAM
Priority
BestEffort
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 12
Internet
Voice
Internet
Voice
Scenario 4
Content Based Service Differentiation
ISP
BRAS
• 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
HAN
VoIP
STB
Intra Domain
Video
Intra Domain
Voice
CPE DSLAM
ISP
Inter Domain
Video
Inter Domain
Voice
ISP
INTERNET
Priority
BestEffort
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 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
Lyngby, November 5, 2004
Halldór Matthías Sigurðsson
Service Differentiation in Residential Broadband Networks Page 14
Questions