Deploying IP video over DOCSIS

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Deploying IP video over DOCSIS

BRKSPV-1126

John Horrobin, Marketing Manager Cable Access Business Unit

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BRKSPV-1126 Cisco Public

Agenda

 IP Video Use Cases

 Delivering IP Video over DOCSIS 3.0 Networks

 Admission Control and QoS

 Optimizing for Adaptive Bit Rate Video

 Bandwidth requirements for IP Video

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IP Video Use Cases

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IP Video Use Cases

 TV Everywhere

 Video Gateway

 Analog reclamation with IP STB

 Full-service IPTV

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Connected TV

PC

Play Station

iPad iPhone Android Phone

Digital STB CM/

Gateway CMTS

Home Net

Laptop

Digital STB

IP Video Use Case #1: TV Everywhere

Edge QAM

Data VoIP IP Video

Linear VoD NPVR

IP Services

Digital Video Services

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Connected TV

PC

Play Station

IP STB Unified

Gateway

Connected TV Home

Net

Laptop

Digital STB

IP Video Use Case #2: Video Gateway

CMTS

Edge QAM

Data VoIP IP Video

Linear VoD NPVR

IP Services

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Connected TV

PC

Play Station

CM/

Laptop

Digital STB

IP Video Use Case #3: Analog Reclamation

Edge QAM

Data VoIP IP Video

Linear VoD NPVR

IP Services

IP STB

Home Net

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Connected TV

PC

Play Station

IP STB CM/

Laptop

IP STB

IP Video Use Case #4: Full-service IPTV

Data VoIP IP Video

IP Services

Home Net

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Delivering IP Video over DOCSIS 3.0 Networks

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Cisco Video over DOCSIS 3.0 Solution

Managed

& Unmanaged CPE Devices

Video over DOCSIS Solution uBR10012

w/ 3G60 CMTS

RFGW-10 EQAM

SP Video

PCMM PS

D20 or D30

CM

SRM

Internet

High-speed Data (HSD) &

Over-the-top (OTT) Video Service Provider (SP) Video SP Video Control Plane

HSD &

OTT Video

HFC

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Content Format

Unicast Switched Broadcast

Delivery Method

Hard Partition Soft Partition

Shared

HSD VoIP IP Video

Service Separation

DOCSIS Topology

Bandwidth Allocation

CIR

Best Effort

Dynamic Bandwidth

Sharing

Dynamic Load Balancing

Fairness

PCMM/IGMP IP Video Overlay

DOCSIS Overlay 1:1

HSD VoIP IP Video

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CBR

VBR

ABR

Cisco Video over DOCSIS 3.0 Solution

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 Linear TV delivered to all subs all the time (independent of viewership)

 Lowest CMTS DS capacity/cost; typically requires more spectrum than switched

 Most suitable for large number of subs and popular programming

Unicast Switched Broadcast

IP Video Delivery Methods

 Linear TV delivered only to active viewers

 Most efficient use of spectrum; higher CMTS DS capacity/cost than broadcast

 Network sizing based on viewership statistics

 Personalized linear TV and VoD delivered to each sub

 Highest CMTS DS capacity/cost and spectrum requirement for linear TV

 Alleviates multicast requirements on end-to-end IP Video system

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Delivery of IP Services over DOCSIS

Service Group 1

Service Group N 4x4 D30 CM 1x1

D20 CM 8-ch

BG 4-ch

BG

8x4 D30 CM

4x4 D30 CM 1x1

D20 CM

8x4 D30 CM 8-ch

BG 4-ch

BG

CMTS

Integrated or Modular

HSD/VoIP/

IP Video HSD/VoIP/

IP Video

8x4 D30 CM

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Delivery of IP Services over DOCSIS

Service Group 1

D20 CM 8-ch

BG 4-ch

BG

8x4 D30 CM

4x4 D30 CM 1x1

D20 CM

8x4 D30 CM 8-ch

BG 4-ch

BG

CMTS

HSD/VoIP/

IP Video

HSD/VoIP/

IP Video

8x4 D30 CM

HSD/VoIP/

IP Video HSD/VoIP/

IP Video

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Delivery of IP Services over DOCSIS

Service Group 1

D20 CM 8-ch

BG 4-ch

BG

8x4 D30 CM

4x4 D30 CM 1x1

D20 CM

8x4 D30 CM 8-ch

BG 4-ch

BG

CMTS

HSD/VoIP/

IP Video

HSD/VoIP/

IP Video

8x4 D30 CM

HSD/VoIP/

IP Video HSD/VoIP/

IP Video

Linear TV

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Delivery of IP Services over DOCSIS

Service Group 1

D20 CM 4-ch

BG

8x4 D30 CM

4x4 D30 CM 1x1

D20 CM

8x4 D30 CM 4-ch

BG

16x4 D30 CM

16x4 D30 CM 8x4

D30 CM

8x4 D30 CM

CMTS

All Viewed Linear TV

8-ch BG

Multicast IP Video

Multicast IP Video HSD/VoIP/

Unicast IP Video HSD/VoIP/

Unicast IP Video

16-ch BG

16-ch BG

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Delivering IP Video via Broadcast

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Service Group 1

Service Group N HSD/VoIP/Nar

rowcast IP Video

1:N

Broadcast IP Video

Cable Modem IP STB

HSD/VoIP/Nar rowcast IP

Video

IP STB

CMTS

Cable Modem RF

Spanning DS Bonding

Group DS Bonding

Group

DS Bonding Group

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Delivering IP Video via Broadcast

Service Group 1

1:N

Cable Modem IP STB

Video

IP STB

CMTS

Cable Modem RF

Spanning Broadcast

Video

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Delivering IP Video via Broadcast

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Service Group 1

1:N

Cable Modem IP STB

Video

IP STB

CMTS

Cable Modem RF

Spanning Broadcast

Video

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Broadcast & Switched Delivery of Linear TV

Service Group 1

D20 CM 8-ch

BG 4-ch

BG 8x4

D30 CM 1:N

4x4 D30 CM 1x1

D20 CM

8x4 D30 CM

16x4 D30 CM

Static Multicast

CMTS

Popular Linear TV

Long-tail Linear TV

Dynamic Multicast

12-ch BG

8-ch BG 4-ch

BG 12-ch

BG

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F o r w

a r d

C o m

b i n e r

F o r w

a r d

C o m

b i n e r

HFC

SG 1

SG N

Universal EQAM

DOCSIS QAM Replication

VoD QAM Replication

Broadcast QAM Replication

CCAP with Modular Headend Architecture (MHA-CCAP)

Data VoIP IP Video

Linear VoD NPVR

CMTS IP Services

SDV QAM Replication

Maximize ROI, reduce OPEX, optimize UEQAM utilization, simplify combining networks

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 All services share bandwidth dynamically

 Application-based admission control can reserve different amounts of bandwidth for CIR flows of different applications (SFAC)

 No guarantees for aggregate bandwidth of each service’s best effort traffic

Hard Partition Soft Partition

Shared

HSD VoIP IP Video

 Overlapping BGs for different services across same set of DSs

 Ability to provide guaranteed amount of bandwidth per service even for best effort traffic

 Dynamic Bandwidth Sharing capability. Any unused bandwidth from one service’s BG is made available for another service’s BG

 RF channels are dedicated for specific services

 No dynamic bandwidth sharing.

 Unused bandwidth from one service cannot be used by another service

Service Separation

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Overlapping Bonding Groups

Service Group 1

Service Group N

8x4 D30 CM

16x4 D30 CM

16x4 D30 CM 8x4

D30 CM

8x4 D30 CM

CMTS

HSD/VoIP/

IP Video

HSD/VoIP/

IP VIdeo HSD/VoIP/

IP Video HSD/VoIP/

IP Video

16-ch BG’s 8-ch

BG’s

8x4 D30 CM

8x4 D30 CM 8x4

D30 CM

8x4 D30 CM Use Service Flow attributes to direct flows to Bonding groups

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Traffic Steering

 Map flows to DOCSIS Service Flows – Service Flows can be static or dynamic

– Static Service Flows can use DSCP or Video Server IP address for classifier – MQoS used to assign Service Flow attributes per (S,G)

– Dynamic Service Flow classifier signaled at session setup time

 Steer DOCSIS Service Flows to Bonding Groups via SF attributes – Attributes configured on Bonding Groups

 Single IP flow per DOCSIS Service Flow – Fine grained control

– Protects flows from other misbehaving flows behind same CM – Typically used with dynamic Service Flows

 Multiple IP flows per DOCSIS Service Flow – Lack of fine control per flow

– Typically used with static Service Flows

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Admission Control and QoS

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Admission Control and QoS

VoD: PCMM

VOD streamer CMTS

IP Network

Policy

Server Application Manager PCMM

Admission Control

CM

• CMTS forwards unicast video streams based on PCMM signaling

• Policy Server performs authorization checks and signals CMTS with QoS requirements

• Upon receipt of Gate-Set, CMTS creates classifier and service flow and reserves bandwidth

• Flexible forwarding to cable interface based on service flow attributes

IP Video Device

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VoD: RSVP

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IP Network

Admission Control

CM

• Entitlement performed prior to initiating bandwidth reservation request

• CMTS pre-configured with video service class

• Upon receipt of RSVP, CMTS creates classifier and service flow and reserves bandwidth

• Flexible forwarding to cable interface based on service flow attributes

IP Video Device RSVP

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Multicast: IGMP

Multicast Video Source

CMTS IP

Network

IP Video Device IGMP Join

DBC Admission Control /

Authorization

CM

• CMTS forwards multicast video streams based on IGMP traffic from IP Video Device

• CMTS pre-configured with video service class

• CMTS performs admission control and multicast authorization

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Multicast: PCMM

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IP Network

Policy

Server Application Manager PCMM

Admission Control

CM

• Multicast extensions included in PCMM IO5

• CMTS dynamically forwards multicast video streams based on PCMM signaling

• Policy Server performs authorization checks and signals CMTS with QoS requirements IP Video

Device DBC

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Optimizing for Adaptive Bit Rate Video

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How does ABR impact Video over DOCSIS solution?

 Most features described are applicable to ABR or RTP delivered video

 Channel bonding, RF spanning, VBR and load balancing applicable

 ABR delivered via multicast can leverage IGMP, PCMM for session signaling, use RF spanning for efficiency

 VoD can use PCMM even for ABR

• Admission Control

 Admit flows at desired profile, and use rate-shifting to handle in- home issues

 Admit flows at minimum acceptable profile and allow clients to up- shift when additional bandwidth is available

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ABR and QoS

 With ABR is QoS needed for managed video?

– Can’t client simply downshift till it finds a stable point

• Without QoS:

– Clients “fight it out”

– Operators lose control over what stream gets what QoS

• With QoS

– Operators can apply policies based on type of content, device, and subscriber

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IP Video Business Policies

 Service Level

– Premiere vs Basic

 Content

– Pay vs Free

– Preferred Partner

 IP Video Device

– 60” HDTV vs iPad

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Adaptive Streaming Challenges

 Adaptive Streaming Key Differences

– One-way UDP based to two-way TCP based – Fixed bandwidth to self-adapting bandwidth

 Bandwidth Efficiency

– Upstream and downstream

 Bitrate Adaptation

– Upstream congestion impact to downstream streaming – Simultaneous adaptive streaming sessions

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QoS for ABR streaming

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Bandwidth Requirement Examples

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Factors that influence bandwidth requirements

• Type of service

• Linear or VoD or both

• Target devices

• Bitrate of streams

• Resolution: HD vs SD

• Codec: MPEG4 vs MPEG2

• VBR/CBR/ABR

• Multicast or Unicast delivery of linear services

• Cloud DVR vs Home DVR

• Service Group Size

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Illustrative Example of Broadcast vs Switched Delivery

All Broadcast

All Switched

Broadcast

&

Switched

Broadcast Lineup 65 0 20

Broadcast DS per CMTS 12 0 4

Switched Lineup 0 65 45

Peak Switched Channels per SG 0 40 20

Switched DS per SG 0 8 4

Total Switched DS per CMTS 0 280 140

Total DS per CMTS 12 280 144

RF channels per SG 12 8 8

Assumptions:

1. Average bitrate of each broadcast TV channel = 6.5 Mbps 2. 35 SG’s per uBR10012

3. DS channel capacity = 37 Mbps

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Bandwidth requirements for full-service IPTV

• Modeled capacity for linear and on-demand services

• SG size:100-350 subs

• Multicast for linear

• Multicast gains increase with SG size

• VoD concurrency 20%

• MPEG4

• 50% HD, 50% SD

0 5 10 15 20 25 30 35

Number of DS channels required

Number of IP video subs per Service Group

CBR VBR

For more details see: “HFC Capacity planning for IP Video”, SCTE 2011

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Summary

Cisco’s Video over DOCSIS solution:

 Supports a wide range of IP Video use cases

Multicast options for efficient Linear TV delivery

 Can be optimized for ABR Video

Cost-effective and scalable

 Field-tested in large-scale deployments

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