light reading web in arno v 06
DESCRIPTION
Telecommunications Delivering Carrier-Class Quality in VOIP NetworksTRANSCRIPT
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A Light Reading Webinar
Delivering Carrier-Class Quality in VOIP Networks
Thursday, November 7, 2006
Moderated by
John LongoSenior AnalystHeavy Reading
Sponsored by:
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SpeakersTony Downes
Principal Technologist, Network Protocols DivisionData Connection
Benjamin EllisVP of Product Management and Marketing
Psytechnics
Guido MarxCTO Fixed Solution Division
Alcatel
Bob TravisDirector of Solutions Marketing
Brix Networks
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Alcatel 13.1 billion euros in sales 12% of sales invested in R&D 58,000 employees Active in 130 countries
All figures are for 2005
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Brix Networks Trusted provider of converged service assurance solutions Proven heritage of IP expertise Companys offerings deployed by leading network
operators worldwide to verify service quality for: VoIP IP-based video IPTV Mobile convergence Data services
Brix solutions used to maximize profitability and ensure user satisfaction
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Stable & Independent Privately held and consistently profitable
Consistent model of Top quality products Superior support Talented people
Data Connection (DCL)
Worldwide leader in Networking Protocols
Messaging and Conferencing Solutions
Class 5 softswitch
IMS Application ServersUnified Messaging Applications
SIP, H.248 (Megaco), MGCP, SBC, IP Routing, MPLS, ATM
Tellme.
REVENUEEARNINGS
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Psytechnics World leader in Perceptual Engineering for Quality of Experience Founded in 2000 and Headquartered in Ipswich, England Delivering Technology and expertise behind 6 ITU world
standards P.564 P.VTQ (VoIP Quality Assessment) 2006 P.862.2 PESQ WB (Wideband Active Voice Testing) 2006 J.144 (Broadcast Video Quality Assessment) 2004 P.563 (Passive Voice Testing) 2003 P.862 PESQ (Active Voice Testing) 2001 P.562 (Conversation Voice Testing) 1998
Highly Innovative Over 35 Patents Global Institutional Investor base and customer base Operation and analysis of subjective testing
Database of over 300,000 subjective test results ITU-T compliant in-house subjective test facility and skills
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Agenda Managing services horizontally and vertically VoIP QoS in hybrid network deployments
MPLS at Core Various technologies in the access SBC at the edge
Perceptual view of voice quality Standards and protocols Tools and for active and passive testing
Managing VoIP quality across the network Life cycle approach to quality Quality at the core Actionable information
Managing quality with blended services Admission control Dynamic policy control Network segment specific QoS policies
Summary Questions & Answers
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Managing Quality Horizontally and Vertically
1 Physical
2 Data
3 Network
4 Transport
5 Session
6 Presentation
7 Application
Converged IP Platform
FixedAccess
WirelessAccess
Session Management
Long-haulTransport
Voice Video IM
Blended Services
Web Etc.
Quality must be managed horizontally across the transport network and vertically within the OSI stack.
MPLS provides a framework for QOS management across transport
SBCs bridge the OSI layers at the networks edge
Perceptual quality tools provide a measurement for Quality of Experience
Converged IP platforms and blended services introduce challenges of network contention in the core and to the edge.
Policy control is necessary to resolve contention.
Dynamic policy control recognizes the element of real-time events in policy decisions
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Audience Poll #1
Where is your companys greatest priority in terms of challenges for managing quality
within converged IP networks?
Transport level QoS and performance Resource control Admission control Quality of Experience perceptual based
performance measures
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VoIP QoS in Hybrid Network Deployments MPLS in Core network QoS lite in Access network (ATM, FR, DSL, Cable, Ethernet..) SBC at Edge bridges the gap
Untrusted NetworkDSL over ATM
MPLSmedia
SBC
SIPsignaling
MPLSmedia
SBC
SIPsignaling
IP media
TrustedCore
IP media
Untrusted NetworkEthernet
SIP
SIP
SIP
SIP
SIP
SIP
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MPLS Functions Signaling (Control)
LSP (Label Switched Path) setup static or dynamic Rarely single flows Usually aggregated flows tunnels
Media (Data) Forwarding Admission control Prioritization based on QoS
Edge (ingress) MPLS devices Classifies traffic (FECs) Aggregates non-MPLS traffic (ATM, FR, Ethernet, ..)
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Session Border Controller Functions Connectivity
NAT/firewall, protocol repair Protocol interworking and transcoding
Security Firewall, topology hiding, authentication DOS prevention, signal rate limiting, terminating encryption
Quality of service (QOS) Admission control QOS session monitoring Type of service (TOS) bit marking
Regulatory Lawful intercept (LI) / (CALEA) Emergency services (E911), preemption
Policy-based call routing Call accounting
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SBC Deployment Models
MPLSmedia
SIP signaling
MPLSmedia
SIPsignaling
IP media
IP media
TrustedCore
MediaProxy
Integrated SBC
SignalingProxy
Call Agent/Softswitch
SIP signaling
SIPsignaling
MediaProxy
Distributed SBC
SignalingProxy
Call Agent/Softswitch
H.248control
SIP
SIP
SIP
SIP
SIP
SIP
Untrusted NetworkDSL over ATM
Untrusted NetworkEthernet
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VoIP QoS Moving Forward MPLS
Extends out to enterprise? Is superseded in core by Ethernet?
SBC migration to IMS 3GPP R7 adds
Protocol Conversion Legacy Devices Peering Control IPv4 / NAT
But still lacks Core Bandwidth Management Explicit MPLS/VPN support
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ActiveTools
SubjectiveTesting
PassiveTools
ExperienceManagement
Technology of Voice Quality Assessment
Pre-Deployment Roll-out In-service
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Experience Management
QoE
Service ManagementQoS
Layers of Management
NetworkManagement
Connectivity
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Voice Over IP Management
NGN/MPLS Core
NOC
Mobile
PSTN
NGN-2
Consumer
ApplicationSignalling Control
End PointInfrastructure
Quality ofExperience?
SupplicantServers
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DegradedSignal
Active Measurement Send test signal over network then compare degraded signal in
network with copy of original to produce a media quality measurement
E.g. Perceptual Evaluation of Speech Quality (PESQ) ITU-T Recommendation P.862 Support for narrowband signals(P.862.1) Support for wideband signals (P.862.2)
Systemunder test
ReferenceSignal Auditory
transform
Prediction ofperceived
speechquality
Timealign andequalise
Levelalign
InputFilter
Levelalign
InputFilter
Auditorytransform
DisturbanceProcessing
Auditorytransform
Cognitivemodelling
Re-align bad intervals
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Passive MeasurementMeanOpinionScore
CallHandling/
Interception
Speech StreamExtraction Analysis
Extract TalkerCharacteristics
Vocal TractParameterExtraction
ErrorIdentification
Network
Measure quality of call traffic at any network access point Extract & analyze traffic to assess media qualityE.g. Psytechnics Speech Monitor
Payload analysis in conjunction with P.561 and P.562Payload voice quality, echo, delay, noise level, speech level
ITU-T P.563 plus real-world interfaceIP analysis with P.564
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Be Prepared: Steps in Assuring Service Quality
Network assessment and
readiness for voice, video,
and data
Real-time monitoring and
live call analysis of call quality
details
Simulate and test actual user applications to identify issues
Root-cause analysis to
isolate faults before customer
impact
Assuring service levels are being
met; SLA thresholds and
reporting
Assess - Test Monitor Diagnosis - Assure
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Assurance Starts at the Core Automated testing and monitoring
service performance starts at the MPLS/IP core Monitor multiservice quality and
network performance Requires core-to-access visibility
Measure and monitor all relevant QoS metrics of bandwidth, delay and packet loss at different levels of granularity Used to segment, troubleshoot the
network, and verify/guarantee SLAs
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Finishes at the Customer The missing piece: Pervasive
endpoint management Harvest intelligence utilizing industry
standards Simplify the collection, correlation,
and reporting of IP performance metrics
Gain deeper visibility throughout network (core-to-endpoints) Example metrics: Discard rate, loss
rate, packet delay, signal/noise level, echo level, MOS score
Unified view of IP service performance and quality
CorrelationEngine
Visualization& Reporting
APIRTCP-XR SIP LB TR-069
API APIAPITWAMP
KPI Aggregation
NCS LBAPI
Voice
IP STBPSTN
VoIP Gateway
Voice Voice
DSL Gatewayor RG
Voice
Converged Service Endpoints
Cable GatewayVoice Gateway/Video Headend
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How it Works..VoIP Performance Management
SLA Agreement
Back OfficeIntegration
Visualization
POP
POP
POP
IP Partner
POP
PSTN Partner
Residential VoIP VoIP Handoff
VoIPTrunking
Softswitch
EnterpriseVoIP
Proactive testingLive Call Analysis
MPLS/IPBackbone
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Yields Actionable Information
Business Impact View
Alarm/Problem ViewSLA Reporting ViewRoot-cause View
Dashboard View Topology View
Why itHappened
Why it Matters
Whats the Business
Impact
What it affects
What Happened
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Audience Poll #2
What applications will trigger the need for session based admission control in your network?
VoIP as a sole service Broadband services Converged services platform in the core Blended services in a common application or
access link None. Dynamic admission control is not needed
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The Path to a new IP Service MixMultimedia, nomadic, multiple real-time sessions
Increasing Diversity
I
n
c
r
e
a
s
i
n
g
I
n
t
e
g
r
a
t
i
o
n
Mobile Office Voice
Multimedia Conferencing
Voice/Video Calling/Mail box
Reachabilitybased
communication
Voice/Video Conferencing
IPTVInternetHybrid Phone
VoIP
CommercialBundles
BlendedServices
Multi-service terminalsMulti-access (DSL, WiMAX) network
Conversational services over TV
CLASSIC TRIPLE PLAY
IMS-readyClass 5
Triple PlayBundle Residential and Enterprise VoIP
POTS
Reachability Pilot
NEW GENERATION IP SERVICES
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End-to-End QoS Extended to all Layers
DSL fixed
Mobile 2G/3G Wifi
Wimax
Web, e mail,
IPTV , VOD
Audio, VideoStreaming
ConversationalVoice / Video
APPLICATIONS
ACCESS
IP Network
Corporate
End to End QoS
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Dynamic Policy Models
EVENT TRIGGER
a. Network attachment
b. Service registration
c. Session establishment
Static Model
Semi-Dynamic Model
DynamicModel
Policy
GranularityPer subscriber Per service
Admission Control (AC)One registration per terminalOne session per terminalGranularityPer subscriber Per service/terminale.g. CLASSIC TRIPLE PLAY
Admission Control
GranularityPer subscriber Per servicePer sessione.g. TISPAN NGN
Policy +AC
Policy
Policy +AC
Policy +AC
PolicyPolicy
POLICY MODELS
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Implementing Policy Models
a. Network attachment
Policy +AC
b. Service registration Policy +AC
Policy +AC
c. Session establishment
PolicyPolicyPolicy
i. Radius, CLI, SNMP, SOAP, vendor specificii. COPS, DIAMETER, Web Services
static dynamicsemi-dynamic
CustomerNetwork
AggregationSPRG
(NT) AN IP serviceedge
PrivateInternet
PublicInternet
Video (BTV+VoD)
Application
BGF
NASS
a. Network attachment
Policy control/RAC
c. Session establishment
User Application Profile
(e.g. HSS)
ApplicationPoliciesb. Service registration
i
Sub/lineProfile
AccessPolicies
H-248
i ii
ii
i
The Select, what You Need solution
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Network Segment Specific QoS Policies
QoS Service ClassBandwidthDelayJitterPacket LossApplication specifics
CPE: EnterpriseVLAN
802.1p/q tagBandwidth
DSCP marking
Network Access : xDSLVLAN 802.1p/Q
DSCP markingShapingPolicing
Admission Control
WiMAX
Network Core:MPLS Tunnel ID +
expectedbandwidth
Content ServerHome
The service offering is improved with dedicated policies for distinct network segments
ApplicationsAllowed sessions Billing inputApplication specifics
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Summary IP-based services require sophisticated tools to measure
quality horizontally and vertically Perceptual based tools are necessary to measure Quality
of Experience Quality statistics must be gathered at various levels and
locations in the network Information needs to be synthesized, organized and
distributed in the appropriate manner for each function Converged networks and blended services increase
resource contention and require additional service management
Dynamic policy control is necessary to deal with real-time resource contention on a service, subscriber and session basis
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Questions & Answers
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Web link to evaluation form
A Light Reading Webinar Delivering Carrier-Class Quality in VOIP Networks SpeakersAlcatelBrix NetworksData Connection (DCL)PsytechnicsAgendaManaging Quality Horizontally and VerticallyAudience Poll #1VoIP QoS in Hybrid Network DeploymentsMPLS FunctionsSession Border Controller FunctionsSBC Deployment ModelsVoIP QoS Moving ForwardTechnology of Voice Quality AssessmentLayers of ManagementVoice Over IP ManagementActive MeasurementPassive MeasurementBe Prepared: Steps in Assuring Service Quality Assurance Starts at the CoreFinishes at the Customer How it Works..VoIP Performance ManagementYields Actionable InformationAudience Poll #2 The Path to a new IP Service Mix Multimedia, nomadic, multiple real-time sessions End-to-End QoS Extended to all LayersDynamic Policy ModelsImplementing Policy ModelsNetwork Segment Specific QoS PoliciesSummaryQuestions & AnswersWeb link to evaluation form