BT multicast plans 2007

40 %
60 %
Information about BT multicast plans 2007

Published on August 16, 2008

Author: internetstreams

Source: slideshare.net

Description

BT\'s work on supporting multicast on its new 21CN next-generation network.

Multicast 27 February 2007 Broadband Working Group Presentation

Technical Roadmap -Q2 Launch Q2 Q4 Q6 Q8 Beta Trial WBC as per product Spec. Improved control over line stability/speed Multicast – IGMP to AP 1024 upstream on ADSL2+ Time table shows Quarters before and after Launch ADSL2+ Annex M Multicast – IGMP to CMSAN

TR-101 REFERENCE MODEL ATM-Ethernet interworking VLAN handling Security QoS Multicast / IGMP OAM Ethernet/VLAN aggregation QoS OAM Resiliency PPPoE and/or IP services Bandwidth/QoS policy enforcement Security Multicast control OAM In 21CNcontext, this could be for primary line voice (H.248) transport to the softswitch This traffic is analogue POTS on the copper so doesn’t need shaping into the DSL payload Other traffic is via the BNG hierarchical scheduler to ensure QoS & correct provisioning

ATM-Ethernet interworking

VLAN handling

Security

QoS

Multicast / IGMP

OAM

Ethernet/VLAN aggregation

QoS

OAM

Resiliency

PPPoE and/or IP services

Bandwidth/QoS policy enforcement

Security

Multicast control

OAM

In 21CNcontext, this could be for primary line voice (H.248) transport to the softswitch

This traffic is analogue POTS on the copper so doesn’t need shaping into the DSL payload

Other traffic is via the BNG hierarchical scheduler to ensure QoS & correct provisioning

WBC Architecture CP EU BRAS B roadband E dge A ggregator Ethernet Aggregation Point (20 Nodes) MSAN (5500 Nodes) DSL Access ADSL2+ single VC PPPoE or oA (oE only for multicast) dedicated to EU Access Aggregation contended, shared amongst multiple EUs PPPoE with IA Aggregation Point Physically shared, logically separate per CP Comprehensive QoS features Customer Access links uncontended, dedicated to each Communications Provider. L2TP or PTA * * * *

TR-101 : QUALITY OF SERVICE OPTIONS DiffServ based IP QoS at the Routing Gateway and the BNG. QoS models : Partitioning of bandwidth among the BNGs Based on business or application characteristics Each BNG controls its partition -> inefficient use of capacity Distributed precedence and scheduling Ethernet QoS in the Access/Aggregation Network Lower classes will be dropped under congestion Fairness between classes but NOT amongst users within a class Hierarchical Scheduling on the BNG A sequence of scheduling steps to model downstream congestion points ( BNG port, Access Node uplink and DSL synch rate) Can be used in combination with the above for per user /session control

DiffServ based IP QoS at the Routing Gateway and the BNG.

QoS models :

Partitioning of bandwidth among the BNGs

Based on business or application characteristics

Each BNG controls its partition -> inefficient use of capacity

Distributed precedence and scheduling

Ethernet QoS in the Access/Aggregation Network

Lower classes will be dropped under congestion

Fairness between classes but NOT amongst users within a class

Hierarchical Scheduling on the BNG

A sequence of scheduling steps to model downstream congestion points ( BNG port, Access Node uplink and DSL synch rate)

Can be used in combination with the above for per user /session control

BRAS downstream QoS - SVLAN view

BRAS downstream QoS - CVLAN view

WBC Multicast VLAN Architecture CP EU BRAS BEA Ethernet Aggregation Point (20 Nodes) MSAN (5500 Nodes) Multicast in IPoE BB & IGMP in PPPoE 1 VC Multicast in IPoE Snoop IGMP in PPPoE 1 VC Terminate PPPoE Terminate IGMP Re-profile EU * * * *

Multicast in IPoE

BB & IGMP in PPPoE

1 VC

Multicast in IPoE

Snoop IGMP in PPPoE

1 VC

Terminate PPPoE

Terminate IGMP

Re-profile EU

WBC Replication Points CP EU BRAS BEA Ethernet Potential Multicast Replication Points Aggregation Point (20 Nodes) MSAN (5500 Nodes) * * * *

Multicast Issues to Consider 21C Very large L2 domains with multiple tiers Large number of possible L2 replication points Use tunnelling as well as routing in the L3 domain Routers not currently multicast enabled Have to balance the efficiency of auto-configuration via PIM against stability, management control and the ability to do troubleshooting IGMP snooping, querying and reporting can produce a significant load on network elements Need to protect network elements against surges in signalling traffic Typical CP Requirement Large number of channels… Viewing still concentrated in a very small number of channels The 5 Terrestrial channels still dominate viewing numbers Channel changing will be correlated in time to a significant degree Could have up to 500 viewers on an MSAN watching the same programme Outside the 5 channels, numbers per MSAN per programme will be very much lower May need a tiered solution….

21C

Very large L2 domains with multiple tiers

Large number of possible L2 replication points

Use tunnelling as well as routing in the L3 domain

Routers not currently multicast enabled

Have to balance the efficiency of auto-configuration via PIM against stability, management control and the ability to do troubleshooting

IGMP snooping, querying and reporting can produce a significant load on network elements

Need to protect network elements against surges in signalling traffic

Typical CP Requirement

Large number of channels…

Viewing still concentrated in a very small number of channels

The 5 Terrestrial channels still dominate viewing numbers

Channel changing will be correlated in time to a significant degree

Could have up to 500 viewers on an MSAN watching the same programme

Outside the 5 channels, numbers per MSAN per programme will be very much lower

Phase 1 Multicast Architecture Multicast across WBC network IGMPv2 joins to BRAS Static configured Multicast between BEA to cMSAN Static Multicast Routing

Phase 2 Multicast Architecture MSAN BRAS AMSAN Dynamic joins via IGMP snooping Static replication PIM-SM or SSM, not DM Dynamic joins via IGMP Green IGMP requests suppressed Red IGMP reports supressed Dynamically send newly requested streams Dynamic joins via IGMP Black IGMP reports suppressed No green IGMP queries - Mixture of statically configured and dynamic paths to get a scalable system – BW and control - Static paths are end to end or partial - Need to optimise where paths, requests, reports and queries originate/terminate * * * *

Multicast CAC C M S A N BRAS STB CPE IGMP CAC M/C Head End Multicast Stream IPoE Multicast IGMP/PPPoE Multicast VLAN Broadband VLAN Video Play Request Multicast Join Authorisation M/C reserve M/C granted D/S line rate A/S status M/C status IGMP CP BTW CP IGMP signals M/C join to BRAS which re-profiles EU CAC function will have to maintain state on EU multicast session so that a subsequent request for an advanced service takes into account the bandwidth already in use for multicast BB Customer Reporting (BBCR) 2 logical interfaces over single VC

Multicast Proof of Concept PoC under construction using existing models at Adastral Park Verify vendor capability including interworking Explore multiple options - Identify technical architecture Technology Up-skilling Develop Showcase Capability Capability for CP’s to take part in PoC to interwork CPE and Head end equipment

PoC under construction using existing models at Adastral Park

Verify vendor capability including interworking

Explore multiple options - Identify technical architecture

Technology Up-skilling

Develop Showcase Capability

Capability for CP’s to take part in PoC to interwork CPE and Head end equipment

PoC Target Network Home Access Metro CP Application / Content BRAS Eth SW Router Services (RADIUS, ADQ etc.) Model IP Network Eth SW Router Adastral IP Network PC STB CPE Router Test Content Router (PIM) MSAN GE

Add a comment

Related presentations

Related pages

BT TV - Wikipedia, the free encyclopedia

BT TV is a subscription IPTV service offered by BT; a division of United Kingdom telecommunications company BT Group, and was originally launched as BT ...
Read more

Google

Advertising Programs About Google Google.com © 2016 - Privacy - Terms. Search; Images; Maps; Play; Gmail; Drive; Calendar; Translate; More. Books; Blogger ...
Read more

BT Sports over standard aerial - Plusnet Community

But there must be a reason that BT Retail do not offer BT Sport over copper multicast. ... BT Sports over standard aerial ... upgrade plans for ...
Read more

Recommendation ITU-R BT.1833-2

Recommendation ITU-R BT.1833-2 ... (2007-2011-2012) Scope ... such as Multimedia Broadcast/Multicast Services ...
Read more

Multicast radio streams - Plusnet Community

BT Sport; About Us ... PlusNet did originally get involved in the multicast trial many moons ago but ... I'm not aware of any plans for PN to support this ...
Read more

ICZM Criteria for Spatial Plans Dipl.Ing. Katarzyna ...

ICZM Criteria for Spatial Plans Dipl.Ing. Katarzyna Scibior 1 June 2007. Mar 27, 2015 Documents william-preston. of 14
Read more

Wholesale requirements for GPON & generic ethernet access ...

WHOLESALE REQUIREMENTS FOR GPON & GENERIC ETHERNET ACCESS (GEA) Gavin Young Chief Architect, C&W Access DATE 26th November 2007
Read more

DSL FORUM 2006 - Broadband Forum

DSL FORUM Annual Report 2006 2006 CHAIRMAN’S LETTER Dear Fellow DSL Forum Team Members, As we launch our plans for 2007, ... BT Chairman Michael Brusca
Read more