Brendan kearns berlin 2012 vn3

IMS Signalling Design and Customer Experience 13 th NGN Signalling Forum Berlin 31st January 2012 Brendan Kearns eircom Shane Dempsey TSSG

Contents ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Eircom Rich Communication Suite 2.0 Trial Subscriber Databases Application Servers Provisioning Billing Alarms Circuit Switched Mobile IMS Core Transit Layer & PSTN Residential & Enterprise Users Web HLR IMS MSC MGC MG VoIP IM ENUM HSS LEG MOB Client WEB PH MOD ISDN Face Book Client VCC HLR PRES PC Client Client Client Client

Eircom RCS: Some Findings Subscriber Databases Application Servers Provisioning Billing Alarms Circuit Switched Mobile IMS Core Transit Layer & PSTN Customers Web HLR IMS MSC MGC MG VoIP IM ENUM HSS LEG MOB Client WEB PH MOD ISDN Face Book Client VCC HLR PRES PC Client Client Client Client Residential Users Liked Media Share Enterprise Users Liked Single No. & Presence User Experience Dominated By The Simple: Handset & Client Interface, callQ, PDD Web Client Made Service Platform Independant

IMS Deployment Timelines ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Initial Deployment & First Line Voice Subscriber Databases Application Servers Provisioning Billing Alarms Circuit Switched Mobile IMS Core Transit Layer & PSTN Customers Web HLR IMS MGC MG RES ENUM HSS PSTN MOB Client Residential Gateway PH MODEM ISDN MGW MGC

Full Deployment & SIP Trunking Subscriber Databases Application Servers Provisioning Billing Alarms Circuit Switched Mobile IMS Core Transit Layer & PSTN Customers Web HLR IMS MSC MGC MG PRV SA RES NGIN ENUM HSS LEG MOB Client RGW PH MOD ISDN MGC SELF CARE IMS SIPT IPBX TOOLS IM SIP Interconnect

Sample Deployment Issue Post Dial Delay

Post Dial Delay: Analogue Phone on Home Gateway ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Overlap Sending is one possible solution Phone Residential Gateway IMS MGCF TERM Exchange En-Bloc Sending Phase User Overlap Phase Network Overlap Phase Address Incomplete Minimum Digits Matched In CPE OFF HOOK INVITE Incomplete Digit Match In IMS Incomplete Address 484 Minimum Digits Req = N Send Digits in Invites INVITE Digit Match Found In IMS. Normal Call Processing IAM More Digits IMS Cannot Determine Number Ln 183 (No SDP) Send Digits In Info INFO No Digit Analysis In IMS TERM Has All Digits Complete Call

Overlap or En-Bloc: Paper Analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

IMS Bench ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Manager SIPp 1 SIPp 2 SIPp N Sig. Agent IMS . . . Synch between Sipp Orchestration & Data Collection SIP IMS Test Traffic

Overlap Simulation Pushes into overload: know our limits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Sample Deployment Issue Understanding & Ensuring Voice Quality

Experiments On Voice Quality ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Method To Test Voice Quality ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],IMS Core Transit Layer & PSTN Gateway Phone Gateway Phone MALDEN DSLA TRANSMIT RECEIVE COMPARE

Audio Stream IMS To PSTN: no congestion IMS Core Transit Layer & PSTN Gateway Phone Gateway Phone MALDEN DSLA TRANSMIT RECEIVE PESQ = 3.57 (Transmitted, Received, Error) Frequency Response Shows 6DB Loss

Audio Stream Sent IMS To PSTN: no congestion IMS Core Transit Layer & PSTN Gateway Phone Gateway Phone MALDEN DSLA High Frequency Signal Loss In Media Gateway? TRANSMIT RECEIVE PESQ = 3.57 (Transmitted, Received, Error) Frequency Response Shows 6DB Loss

IMS TO IMS: Voice Quality During ADSL Congestion ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Solution To Protect Voice Quality ,[object Object],[object Object],[object Object],[object Object],[object Object],DSCP Marking HOME GATEWAY VLAN PBIT Optical VDSL MPLS EXP 7750 7750 7750 VLAN PBIT SWITCHES DSCP Marking IMS HOME ACCESS IMS ADSL ACCESS CORE

Solution To Protect Voice Quality ,[object Object],[object Object],[object Object],[object Object],[object Object],DSCP Marking HOME GATEWAY VLAN PBIT Optical VDSL MPLS EXP 7750 7750 7750 VLAN PBIT SWITCHES DSCP Marking IMS HOME ACCESS IMS ADSL ACCESS CORE Most Important Is That Voice Clocked Out Of Home Gateway Before Internet Traffic

Softclient (WLAN) is Load Sensitive ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],downstream upstream

Can we Really Protect Voice on WLAN? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],1 0 tx time n x 10 micro sec tx wait wait tx freeze 2 4 1 3 0 2

Conclusion Tools To Enhance Call Quality

Tools To Enhance Customer Experience Subscriber Data Mang Application Servers BSS OSS Circuit Switched Mobile IMS Core Transit Layer & PSTN Customers Web HLR IMS MSC MGC MG PRV SA RES NGIN ENUM HSS LEG MOB Client RGW PH MOD ISDN MGC SELF CARE IMS SIPT IPBX IM SIP INTER TOOLS

Conclusion: Recommended Framework ,[object Object],[object Object],[object Object],[object Object],[object Object]

Eircom Voice Call Continuity Trial Subscriber Databases Application Servers Provisioning Billing Alarms Circuit Switched Mobile IMS Core Transit Layer & PSTN Customers Web HSS VCC IMS MSC MGC MG RES ENUM HLR PSTN MOB Client PH

Eircom Voice Call Continuity Trial Subscriber Databases Application Servers Provisioning Billing Alarms Circuit Switched Mobile IMS Core Transit Layer & PSTN Customers Web HSS VCC IMS MSC MGC MG RES ENUM HLR PSTN MOB Client PH - Lack of VCC Clients

Eircom NGIN Integration & Web Exposure Trial Subscriber Databases Application Servers Provisioning Billing Alarms Circuit Switched Mobile IMS Core Transit Layer & PSTN Customers Web IMS MGC MG NGIN PSTN Client Browser Phone MS Outlook Google Maps

Eircom NGIN Integration & Web Exposure Trial Subscriber Databases Application Servers Provisioning Billing Alarms Circuit Switched Mobile IMS Core Transit Layer & PSTN Customers Web IMS MGC MG NGIN PSTN Client Browser Phone MS Outlook Google Maps + OUTLOOK INTEGRATION FITS ENTERPRISE - GOOGLE MAPS APP WAS PURELY TECHNICAL EXERCISE

IMS Benchmark: ETSI TS 186 008 ,[object Object],[object Object],[object Object],[object Object],ScenarioSetup Scenario “Call Flows”

Why Do We Have Post Dial Delay Issues? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Mean Opinion Score ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Strategy - Performance ,[object Object],[object Object],[object Object],[object Object],Activity Scenario Registration Initial with Auth De/Re-registrations Calls Successful Call of 1, 2, 5, 10 mins With[out] resource reservation Rejected Call Abandoned Calls Messages Successful - To Individual Successful - To Group Unsuccessful – User not found

Simulation of Overlap Signaling Simulated SS7 <sample> random dialled d igits Statistically Distributed <pause> <recv timeout=“6000” ontimeout=“end”>

Trials Versus Deployment ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Brendan kearns berlin 2012 vn3

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