ims service monitoring. 2 will brouwer business development [email protected] converged tool...
TRANSCRIPT
IMS Service Monitoring
2www.ITEXPO.com
Will BrouwerBusiness Development [email protected]
Converged Tool Set
•End-to-End•Phased Analysis•Converge Platform•Management Challenges•Key Lessons
3www.ITEXPO.com
End-to-End Visibility
P-CSCFPDF
HSSHSS
Node B
Node B
BTS
BTS
UTRAN
GSM
Cable/xDSL/WiFi
SGSNGGS
N
GPRS
MGWMSC
Server
AccessNode B-RAS
IP
IP
IMS
VoIP Signaling
SS7
HLRHLR MSC STP
I-CSCF
S-CSCF
BGCF
MGCF
SIG G/W
MRFP
MRFC
App Servers
IPTV & VoD
Content & Services
Interconnect
AccessGPRS IP
SS7GPRS IP
SS7 IMS VoIP
GPRSIP
SS7IMSVoIP
Content SS7 IMSVoIP
Media/MOSIPTV, VoIP
4www.ITEXPO.com
Sample Agilent IMS tracefrom SIP-based combined wireless/wireline device
Interpret..
Analyze..
Guide..
Reactive
Proactive
Implementation
Lab & Trial
Engineering
Operations& NOC
Customers
Phased Analysis
ConvergedNetwork
& Services
GSM
GPRS
UMTS
WiFi
VoIP
P-CSCFPDF
HSSHSS
I-CSCF
S-CSCF
BGCF
MGCF
SIG G/W
MRFP
MRFC
App Servers
5www.ITEXPO.com
Convergent Platform
Data Gathering Probes
Correlation & xDR Generation
MeasurementFramework xDR Store xDR enrichment
Convergent Applications
6www.ITEXPO.com
IMS Management Challenges
•Significant amounts of inter-working with other protocols•Interoperability (mobility, NEMs)•Location & Presence•Many elements involved in call setup path•Services are easy to deploy but few tools to quantify impact on network •Troubleshooting is complex•Managing the end-to-end customer experience
And….
•Specs are evolving fast: significant extensions to signalling procedures•IPSec with null encryption within IMS•IPv6•Compressed SIP
7www.ITEXPO.com
Key Lessons
New Paradigm for troubleshooting– Real-time and Historic view is essential
Continuous Evolution – Services – i.e. signaling and service flows– Architectures – session border controllers– Equipment – e.g. handset firmware changes behavior– Protocol implementation/stacks - vary widely– User community dynamics
What to measure?– KPIs need to be service-centric in addition to network– Element Capacity and Load – prediction and monitoring– Trunk planning on media gateway
Performance?– Data retention, Transaction rate
8www.ITEXPO.com
Key Lessons
•IMS Monitoring Strategy•Prioritize monitoring of nodes according to ….
– Does the node inter-work with another protocol?
– Does the node perform a critical service routing decision?
•Suggested order of priorities– I-CSCF => Gatekeeper to network
– S-CSCF => Decides on admission to services and routes services
– MGCF => Circuit inter-working. Access to media path QoS info
– MRFC => Access to media QoS information
– P-CSCF => Simple load balancer
MGCFMGCFMGCFMGCFI-CSCFI-CSCFI-CSCFI-CSCF
P-CSCFP-CSCFPDF
P-CSCFP-CSCFPDFMRFCMRFCMRFCMRFC
S-CSCFS-CSCFS-CSCFS-CSCF BGCFBGCFBGCFBGCF
9www.ITEXPO.com