WBC Quality of Service (QoS) Options

23rd October 2008

Andy MaddocksDave BrennanPaul FishburnPaul Burke

Legal and Confidentiality Statement

The information contained in this Presentation is confidential information as per your terms and conditions with BT Wholesale (BTW). Please treat it accordingly and do not forward, republish or permit unauthorized access. The information contained in this Presentation represents BTW’s plans for the WBC product at the time this Presentation was developed and may be subject to change. In relation to any products/services referred to in this Presentation which are currently under development and/or trial, BT gives no undertaking or other commitment that the product/service will be made commercially available in the same forms.

Any price indications and time scales contained within this Presentation are estimates for information purposes only and do not constitute any contractual or other obligation.

All prices/charges are shown exclusive of value added tax and any other applicable duties and taxes which will be added to invoices.

BT reserves the right to make changes to the information in this Presentation at any time without further notice.

Any developments carried out by CPs based on the contents of this Presentation are entirely at the CP’s own risk.

Note “BT” and “BT Wholesale” are trademarks of British Telecommunications plc.© British Telecommunications plc, 2008. All rights reserved.British Telecommunications plcRegistered Office: 81 Newgate Street London EC1A 7AJ Registered in England no.1800000

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Agenda

• Elevated and Standard End User Access (EUA) Options• Quality of Service (QoS) Application Fit• Overview of QoS options

– Best Efforts– Assured Rate– Real Time– DDQ

• Capacity Management and performance measures• QoS Pricing Structure• Q&A

2

End User Access Options – Elevated vs Standard

Standard• You get at least 2Mbit/s for 90% of the time over the busiest 3-hour period • Blue print being written and led by the Fibre product team on suitability• 20c use this for VOIP today with mixed results.• Do not recommend being used for primary voice

Elevated• If high congestion occurs and you selected Elevated you have more throughput. • You get at least 3Mbit/s for 90% of the time over the busiest 3-hour period.• Cost is £1.70 in dense and £3.40 in other cells per EU per month.• This does not guarantee packets would not be delayed. • Orderable via the new 21c interface

• Equivalent in 20c are IPstream Office and BT IPstream Max Premium

Elevated is a premium service that allows a higher percentage of traffic throughput when compared to the Standard option.

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Best Efforts Assured Rate QoS Real Time QoS ** DDQ **

Data Video Voice Data

Web browsing

Music/video publishing

Email & interactive gaming

e-Commerce & instant messaging

Increased interactivity, bandwidth& traffic volumes

Increasing variety of applications necessitates QoS mechanisms to protect more demanding applications

High Definition

Higher Bandwidths

More efficient codec's

More resilient to losses & congestion

Constant Picture Quality vs. Constant Bit Rate

IP Telephony, voice messaging, video telephony

Increasingly demanding QoS requirements due to higher interactivity

Increased signaling and control demands

Systems’ performance demands (e.g. call centre systems)

Dedicated downstream end to end bandwidth.

Continually available.

Less complex set up than Assured rate.

QoS Application Fit - Class levels & associated application characteristics

4

The Choice – Priority of ApplicationsBest Efforts

Has 3 options aimed at Data applications.

• Sub*• Best Efforts• Priority*

Real Time**

* Not yet available dates to be confirmed** Real Time dependant on prioritisation of product enhancements

Highest option of QoS aimed at any application needing low latency and jitter.

• Strict priority• Higher quality of VOIP• Multiple channels (220,350,700 k\bits)• 0.01 packet loss • Reduced risk of bursts of high latency• Not available on 20c

5

The Choice – Dedicated Bandwidth

Dedicated Downstream QoS (DDQ)• Clear channel dedicated bandwidth• Set up as part of end user provision order• Available 24 / 7• Capacity driven application i.e. CVLAN capability• Closest 20c product is Datastream• Packet marking is the same as Assured• Guaranteed only downstream• End User line must be able to support the dedicated service

Assured• Aimed at Video applications• Bookable sessions of dedicated traffic up to 24hrs in duration• Default 5hrs duration.• Capacity driven application i.e. CVLAN capability• End User line must be able to support the bandwidth selected • Customer Enablement i.e. configuration set up• Order via new 21c interface• CP has upfront costs of system development• Advanced Services is the closet equivalent on 20c

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Class DSCP codepoint Binary value Decimal value

Real-Time EF 101 110 46

Assured AF11 001 010 10

Best Effort (Priority) AF21 010 010 18

Best Effort (Normal) DE 000 000 0

Best Effort (Sub) EXP/LU 000 011 3

Packet markings

WARNING: If a CP does not buy Assured Rate or Real Time traffic classes, but marks traffic as Assured Rate or Real Time, this will result in traffic being dropped. This is different to the behaviour on IPstream.

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BRAS CP Network

CoreNode (20)

Content

MSAN

Openreach

BT Wholesale

BTW Backhaul

Call Server

MSIL

Wholesale Broadband Backhaul Management

Traffic prioritisation to suit application needs:

-Real Time-Assured

- Best Efforts

Capacity management of backhaul to ensure:-Assured / Real Time traffic guaranteed

delivery up to agreed levels- Sufficient bursting capacity for Best Efforts

traffic- Higher throughput for Elevated

CPs can order per traffic class bandwidth to determine the overall

experience of their products

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Downstream QoS at the BRAS

Hi weight

Med weight

Priority

Normal

Highest priority level

Pre-defined queue-

CVLAN shaped to specified max. bandwidth, and competes for SVLAN

bandwidth with other CVLANs

X Best - Effort

Use of either priority level or weighting to guarantee bandwidth

Real Time

Hi weight Priority

Normal

Highest priority level

CVLAN shaped to specified max. bandwidth, and competes for SVLAN

bandwidth with other CVLANs

X

Use of either priority level or weighting to guarantee bandwidth

Assured Rate

On-demand queue

Lo weight Sub- BE

Higher weight for Elevated

Low

High

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Downstream QoS at the BRAS - Technical Proposal for DDQ

• Achieved with dedicated queue at the BRAS for Dedicated Downstream QoS traffic

• Uses same packet marking as Assured Rate (Assured Forwarding traffic class)• Available at ppp start rather than configured on-demand as Assured Rate• Excess Traffic will be dropped rather than forwarded as Best Efforts

Hi weight

Med weight

Priority

Normal

Highest priority level

Pre-defined queue-

X

• Weight set higher for Elevated EUs than Standard EUs, to give greater share of SVLAN for BE

Best-Effort

Use of either priority level or weighting to guarantee bandwidth

Real Time

Hi weight

Lo weight

Priority

Normal

Highest priority level

End User traffic shaped to specified

max. bandwidth.

Real Time & Best Efforts only

compete for SVLAN resource with

other EU traffic

• Weight set higher for Elevated EUs than Standard EUs, to give greater share of SVLAN for BE

Best-Effort

Use of either priority level or weighting to guarantee bandwidth

Assured Rate

On-demand queue

Dedicated Downstream BandwidthPre-Defined queue

High

Low

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Sub- BE

WBC Performance Targets

Real TimePacket loss: 0.01% for a peak period of time

Assured RateSession Blocking Ratio: 1% during the busy period

Best Efforts Elevated EUAThroughput: Above 3M for 90% of the time during

the 3-hour busy period

Best Efforts Standard EUAThroughput: Above 2M for 90% of the time during

the 3-hour busy period

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WBC Price List

Optional features charged in addition to basic service charges

UnitNon

GeographicA

DenseC

Mid

ENon-

DensePer End User ChargesRentals

Uncapped ADSL2+ 1 Month 01/05/2008 Month £0.00 £0.00 £0.00Elevated Best Effort 1 Month 01/05/2008 Month £1.70 £3.40 £3.40Assured Rate 1 Month 01/05/2008 Month £0.10 £0.20 £0.50

End User Access MaintenanceMaintenance Class 4 1 Month 01/05/2008 Month £6.90Special Faults Investigation (SFI) N/A 01/08/2008 Occurance £144.00

Aggregation Point Network CapacityAP Bandwidth above Contracted Total

0-5% N/A 01/05/2008 Mbit/s per month £79.34 £79.34 £79.34>5% N/A 01/05/2008 Mbit/s per month £150.00 £150.00 £150.00

Contracted Assured Rate Bandwidth (BW) 12 Months 01/05/2008 Mbit/s per month £0.00 £0.00 £0.00AR BW Usage above Contracted: 0-5% N/A 01/05/2008 Mbit/s per month £50.00 £50.00 £50.00AR BW Usage above Contracted: >5% N/A 01/05/2008 Mbit/s per month £50.00 £50.00 £50.00

Session Charges for Assured RateSet up 01/05/2008 Session £0.01500Duration - 00:00 - 08:00 01/05/2008 100Kbit/s per min £0.00006Duration - 08:00 - 18:00 01/05/2008 100Kbit/s per min £0.00006Duration - 18:00 - 00:00 01/05/2008 100Kbit/s per min £0.00006

Geographical Tiers

Basic ServiceMinimum Period

Operative Date Charge Unit

Non Geographic

ADense

CMid

ENon-Dense

Per End User ChargesConnection N/A 01/05/2008 Occurrence £34.86Order Cancellation (up to PONR) N/A 01/05/2008 Occurrence £15.00CP Migration N/A 01/05/2008 Occurrence £11.00Product Migration from IPstream or Datastream N/A 01/05/2008 Occurrence £11.00Multiple Product Migration N/A 01/05/2008 Occurrence £0.00Cease N/A 08/09/2008 Occurrence £15.75EU Access Modify Orders Reset min period 01/05/2008 Occurrence £0.00

Standard EU Rental (SMPF / 8Mbits/s) 1 Month 01/05/2008 Month £6.17 £7.95 £7.95Aggregation Point and Network CapacityAP (Individual Nodes) 12 Months 01/05/2008 Month £1,528.00AP Contracted Total Bandwidth 12 Months 01/05/2008 Mbit/s per month £79.34 £79.34 £79.34Modify AP Bandwidth Reset min term 01/05/2008 Occurrence £0.00Extension PathEP Connection N/A 01/05/2008 Occurrence £0.00EP Modify Reset min period 01/05/2008 Occurrence £0.00100Mb EP 12 Months 01/05/2008 EP per Year £1,704.00200Mb EP 12 Months 01/05/2008 EP per Year £3,408.00300Mb EP 12 Months 01/05/2008 EP per Year £5,112.00400Mb EP 12 Months 01/05/2008 EP per Year £6,816.00500Mb EP 12 Months 01/05/2008 EP per Year £8,520.00600Mb EP 12 Months 01/05/2008 EP per Year £10,212.00700Mb EP 12 Months 01/05/2008 EP per Year £11,916.00800Mb EP 12 Months 01/05/2008 EP per Year £13,620.00900Mb EP 12 Months 01/05/2008 EP per Year £15,324.001 Gb EP 12 Months 01/05/2008 EP per Year £17,028.0010Gb EP 12 Months 01/05/2008 EP per Year £57,060.00

Geographical Tiers

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QoS Pricing Structure

Real Time 7p Kbit/s p.m.(indicative)

Assured 0p Kbit/sp.m.

Best efforts0p Kbit/s p.m.per mth

Basic Traffic 7.934 p per Kbit/s per mth

APReal Time 14.934 p.m.(indicative)

Assured2p Kbit/s p.m.(indicative)

Best efforts7.934p Kbit/sp.m.

Current Price Structure

Proposed Structure

QoS charged independently of Best Efforts

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Q & A

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