push to talk (ptt) service assurance...5 analyze assure accelerate tm • as with any new service,...
TRANSCRIPT
Analyze Assure Accelerate
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Push to Talk (PTT) Service Assurance
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• Introduction
• PTT Probe TechnologyØ Monitoring
Ø Troubleshooting
Ø Performance
• Conclusions
Agenda
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What does a PTT network look like?
RadioAccessNetwork
CDMA2000Call
Core NetworkPTT Server
Functionality
Originating Mobile
RadioAccessNetwork
CDMA2000Call
One or moreTerminating Mobiles
ControlMessaging Control
Messaging
VoicePackets
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What is service assurance?
• Measuring and monitoring theend user experienceØ Probes
• Active Measurement Devices• Passive Measurement Devices
Ø Network Elements• IP Routers• ATM/FR Switches
• Analysis and reporting of the networkØ Performance monitoring and reportingØ Fault management and root cause correlationØ Centralized testing: Automated and on-demand
Centralized OSS
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• As with any new service, it is important to understand and characterize performance metrics that will impact the end user’s perception of quality
• This is particularly important with PTT because an expectation already exists for the quality of this serviceØ PTT compared to existing CDMA circuit-switched voice
service
Ø CDMA VoIP-based PTT compared to existing PTT service using other technology
Why network level service assurance?
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PTT Probe Technology
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PTT Service Assurance
• PTT Probe Technology Ø Probe Device (Sectionalize the Problem)
• Mobile/Fixed• Local/Remote
Ø Centralized OSS
Mobile Probe Stationary Probe
Centralized OSSRadio tower
E2E Service AssuranceE2E Service Assurance
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• The capability to track probes on the network over time
• Status of the network (health)
Ø Periodic updates of probe status
Ø What areas of the network are active?
Ø How healthy is the network?
PTT Monitoring
Centralized OSS
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PTT Monitoring - Analysis
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• The capability to troubleshoot probes on the network
• Remotely answering the question “Why”Ø Air Interface Failure
Ø Access Failure
Ø Network Failure
Ø Registration Failure
Ø Connection Failure
Ø Call Setup Failure
Ø Protocol Failure
Ø Timeout Failure
Ø Busy Failure
PTT Troubleshooting
Centralized OSS
AccessFailure
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PTT Troubleshooting - Analysis
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• The capability to measure performance of probes on the network
• Determines how well the service isperformingØ Registration DelaysØ Call Setup DelaysØ Floor Availability DelaysØ Audio DelaysØ Audio Quality
• PESQ MOS Scoring• Jitter• HOT• FEC
PTT Performance
Centralized OSS
PESQ=Delay=
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PTT Performance - Analysis
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Conclusions
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• Ability to qualify network performance• Ability to baseline the network
Ø Peak hour performance/statisticsØ Off peak hour performance/statistics
• Ability to obtain measurements necessary to optimize performance for PTT services
• Ability to troubleshoot problem areas of the network, remotely
• Ability to analyze and measure the impact of new software releases
Benefits of PTT Probe Network Technology
Assuring Best in Class ServiceAssuring Best in Class Service
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Contact Information
Michael D. Bailey
Group Manager – Development and Deployment Solutions
Spirent Communications, Inc.