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O S T I L L -
F o
t o l i a
CORE CS solution
Solution Presentation
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Agenda
1. Historic2. What is CORE CS ?3. Usage
4. Features5. Case Studies6. Conclusion
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CORE (CS & PS) Astellia is also areference on CORE !
Core CS solution deployed for 19 operators since 2005:
Core PS solution deployed for 25 operators since 2004:
OMC NSS solution deployed for 8 operators since 2008
RT Interface in pilot with Orange & NII groups for CS/VASand end 2010 for PS
RT Alarming/Supervision pilot available on CORE CS
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Which services to monitorwith Cigale CORE CS?
Othernetworks
MSC MSC SGSN
HLRVLR
EIR
VLR
E
A(IP)
IntelligentNetwork
SCP
IN
SMScenter
G
C
DF
Gd
Gf
PSTNGW
PSTN
B Gr
E
G
C
Inbound & Outbound Roamers- localisation- authentication
International SMS- traffic
National and International SMS- traffic
HO inter-MSC- mobility for all mobiles
Outbound Roamers (Voice&Data)- localisation- authentication
Localisation- Based on SMS reception for all
subscribers
IMEI control- for all mobiles
Call establishment- to all my subscribers
Authenticationfor all mobiles
Service analysis- Prepaid/Postpaid- Localisation services-
Troubleshoot- Multi-Interface
MAP-GbMAP-Iu
Troubleshoot- Multi-Interface
MAP-AMAP-Iu
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Usage
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Product target
Scenario 2
(FullCORE)
Scenario 1(Additionto RAN)
Statistics- Outbound/Inbound Roaming (location, SMS,) - ISUP links- Service usage
CAMEL, 2G/3G, prepaid/postpaid
Troubleshooting- Causes interpretation in MSC/SGSN- Multi-interface for combined investigation
(Core with A, Iu, Gb)
Improve dialog between ACCESS and COREinvestigation teams
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Product target
MSC-S
SGSN
SMS-c
IN HLR HLR
BSC RNC BSC RNC
MGW MGW
HLR PSTN
STP ST
P
MSC-S
MSC-S
RAN
COREScenario 2
(FullCORE)
Scenario 1(Additionto RAN)
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CORE CSScenario deployment
Scenario 1: Addition to RAN monitoring ( INVESTIGATION )- To help troubleshoot with CORE CS information
Option to RAN (GSM, Gb or Iu) monitoring
- Today in many cases, Core interfaces already monitored International MAP for Roaming solution (LOR)
IP link due to NGN Release 4
CigaleCORE CS
CigaleGSM
MSCBSC HLRD A
MSC-S
SGSN
SMS-c
IN HLR HLR
BSC
RNC
BSC
RNC
MGW
MGW
HLR PSTN
STP
S
TP
Std extensionto improve RAN
investigations
MSC-S
MSC-S
RAN
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CORE CSScenario deployment
Scenario 2: Full CORE CS monitoring REPORTING andINVESTIGATION - For CORE teams- STP capture synchronized with GPS
MSC-S
SGSN
SMS
-c
IN HLR HLR
BSC
RNC
BSC
RNC
MGW
MGW
HLR PSTN
STP ST
P
Full CORE CSmonitoring
(CAP, ISUP, MAPINAP, Roaming)
MSC-S
MSC-S
CORE
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Features
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Seamless troubleshooting
Drill down from KPI involved toProtocol Decoding issue
Alarming on abnormal behavior
Detailed indicators
CDRs
Flow chart
Protocol
decoding
Macro-indicators
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Statistics
Outbound and Inbound roamers analysis- LU Repartition per Country/Operator- SMS usage- Detection and check
for SOR (Steering Of Roaming) solution
ISUP links usage - Calls #, duration, efficiency, Erlang- National and International destinations- Detailed CIC and TS activity analysis- Congestion detection- White communications ( looped PCM, CIC issues)- Procedure timing analysis
Services usage- Prepaid and Postpaid- 2G and 3G- Packet and Circuit subscribers- SMS
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Troubleshooting
Protocol decoding- All messages are decoded up to TCAP
Flow Chart- Available between any Point Code (PC)
with MAP, CAP, INAP, ISUP and BICC protocols
Multi-Interface (Call Flow)- MAP A (GSM)- MAP Iu (UMTS)- MAP Gb (GPRS)- MAP-MAP, MAP-CAP, MAP-INAP, MAP-SMS- ISUP-MAP, ISUP-CAP, ISUP-INAP
- INAP-MAP-ISUP, CAP-MAP-ISUP- A ISUP- Iu ISUP- A-INAP- A-CAP- A-BICC
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Inbound Roamersover time
Hourly statistics
New roamersper hour
LU efficiency
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ISUP links efficiency(ASR, ABR, NER)
Setup efficiency (% of ACM/IAM) ASR : Answer Seizure Ratio (% of ANM/ACM)
ABR : Answer Bid Ratio (% of ANM/IAM) NER : Network Efficiency Ratio
Hourly statistics
All communicationsphases
efficiency
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CAP efficiencyper service Key
List of different services (localization, prepaid)
Nb of attemptsper service
Service efficiency
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Case studiesTroubleshoot
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To better interpretatecauses (2/2)
Here are examples on message interpretation on MSC level
PLMN not allowed(PLMNNA)
Network Failure(NF)
MSCBSC HLRD A
Cigale CORE CSCigale GSM
PLMN not allowed
Roaming not allowed (barring)
Failure on HLR ressources
Failure on VLR ressources
Unexpected data
System failure
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To better interpretatecauses (2/2)
Here are examples on message interpretation on MSC levelMSCBSC HLR
D A
Cigale CORE CSCigale GSM
Location Update Reject(impossible to conclude)
Unknown subscriber (thanks to MI Core)
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Case studiesRoamers statistics
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Ensure service continuityto Outbound roamers
Solution: Roaming analysis based onoutbound roamers statistics
- Identify biggest destination countries /operators
- Check service availability (subscribers'rights)
- Identify potential problems affectingoutbound roamers
Number of outbound roamers / country / operator
Outbound Roaming efficiency
Outbound
Location Update
success rate
Nb of Location Update
requests
Destination countries/ operators
Customer overviewMiddle east operator
2.5 million active subscribers35 BSCs
Benefits:- Increase roaming revenue- Verify international links performance- Assess / optimize roaming
agreements
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Roaming agreementsfor Inbound & Outbound Roamers
LU efficiency per operator LU efficiency per group LU efficiency per country SMS MT internat al success rate
Check all Roamingagreements !!!
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Seamless troubleshooting
Detailed indicatorsCDRs
Flow chartProtocoldecoding
Macro-indicators
Determine list of Roamersimpacted
Distribution onCause of rejection
For any issue detected:Roamers rejection, Call inefficiency, Service unavailability
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Steering of Roamerssolution (SOR)
For Inbound and Outbound roamers
- Location Update efficiency per country- Confirmation of steering solution Ratios should be checked with roaming service 0% < LU success rate < 50% Nb of inbound roamers > 100
Investigation per HLR (based on GT - Global Title)- for an operator, if one HLR always reject all LU and another HLR always succeed, then
SOR may be implemented!
Detect SOR implemented by other operatorsCheck your own statistics of your SOR solution
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Case studiesISUP links
f
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Identify & analyzeCDRs & revenue discrepancy
CDR MSC CDR IN
IN interface
1 2
34
Situation before Astellia Services: Communication durations are different
between:- Calls recorded by MSC- Calls recorded in Intelligent Network platform
Impact: Potential loss of revenue
1
2
Astellia analysis & recommendations Check the consistency between:
- MSC CDRs (A interface)- IN CDRs (INAP interface)
Determine which equipment is responsible fordiscrepancies
3
4
Benefits after implementation Assure no loss of Revenue Improve resources efficiency
=
I
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Increaseinternational revenue
Situation before Astelliasupport:
Up to 45% of call attemptfailures to some internationaldestinations
Difficulty to analyze & localizeprecisely failures
Impact: Negative customer perception Loss of revenue
ISUP analysis & recommendationsIdentify & analyze precisely revenue loss linked to:- Local network inefficiency- International platform lack of performance- Destination network
Benefits after implementation Better customer perception Increased revenue
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Conclusion
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Conclusion
Scenario 2
(FullCORE)
Scenario 1(Additionto RAN)
Statistics- Outbound/Inbound Roaming (location, SMS,) - ISUP links- Service usage
CAMEL, 2G/3G, prepaid/postpaid
Troubleshooting - Causes interpretation in MSC/SGSN- Multi-interface for combined investigation
(Core with A, Iu, Gb)
Improve dialog between ACCESS and COREinvestigation teams
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O S T I L L -
F o
t o l i a
Thank you for your attention.
www.astellia.com
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Protocols
MAP, CAP, INAP, SMS, ISUP and BICC are part of SS7 Protocol
ISUP
IntelligentNetwork
Appl. Part(INAP)
TransactionCapabilities
Application Part(TCAP)
Signaling Connection and Control Part (SCCP)
SIGTRAN(M2UA, M3UA)
4
3
2
1
BSSAP RANAP
CAMELApplication
Part(CAP)
MobileApplication
Part(MAP + SMS)
MessageTransfer Part(MTP)
BICC
MAP conform to GSM 3GPP 09.02 Phase 1 (v3.11.0), Phase 2 (v4.19.1) and Phase 3 (v3.15.0)
INAP CS-1 conform to CS 1 ITU-T Q1218, ETSI STS 300 374-1, GF001-9001
INAP CS-2 conform to CS-2 ITU-T Q1228 (09/1997)
CAMEL has been specified in 4 phases: Phase 1, 2, 3 and 4
ISUP conform to ITU-T Q.763
BICC conform to ITU-T Q.1901
S t
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ISUP BICCSMSINAP CAPMAPCORE
Capture
CORE
Same captureSame probe
GPRS
PSTN
MSC SGSN
GSM UMTS
A Gb Iu-PsIu-Cs
EIR HLR
Standard Astellia Capture
SMS-C
IntelligentNetwork