9958 Wireless Trace Analyzer (WTA) • Chetan Tanna • 23-March-2016
1
© Nokia 2016
Nokia Internal Use
AGENDA
Overview Product Support Roadmap Reference Material
2
© Nokia 2016
Nokia Internal Use
WTA Overview Wireless Trace Analyzer (WTA) is a tool that provides end to end call trace view and enables optimization, analysis and troubleshooting LTE*, Small Cell, WCDMA, IMS, CDMA and EVDO networks. Traces the entire call signaling messages from inception to completion on Nokia Network Elements Decodes 3GPP protocol and Network Element proprietary messages Correlates call trace data between Network Elements
* interactive call trace activation and automated call trace data collection supported in real time 3
© Nokia 2016
Nokia Internal Use
(fALU) LTE Call Trace Flow
Centralized Call trace Initiation and Analysis
Statistics /Metrics Messages
9958 WTA
Events Call Trace, MDT RF Trace Call traces
TCE
(MME, S-GW, P-GW)
MME
S-GW 4
© Nokia 2016
Call traces, MDT RF Trace
(UPOS messages)
S1 Metro
P-GW Nokia Internal Use
eNB
License Information (PC Client User) WTA Software License is managed by License Key Delivery Infrastructure (LKDI) New User needs to Activate the WTA Software for the first time PC needs to have internet connectivity
License are valid for each major release of WTA (e.g. 10.x license are valid for 10.1 and 10.3 release) A new upgrade license is needed for upgrade to new major release of WTA (e.g. to upgrade from 10.x to 11.x release) WTA 10.x aligns with LR14.x, WTA 11.x aligns with LR15.x.
Floating License is per PC/user. License can be returned, so it can re-used by another PC/user Separate License is needed for each Technology (i.e. LTE, WCDMA, etc.) 5
© Nokia 2016
Nokia Internal Use
License Information (Citrix Server)
License is managed by Proprietary WTA Software
Manual License file is provided specific for the Citrix Server
License are valid for each major release of WTA (e.g. 10.x license are valid for 10.1 and 10.3 release) A new upgrade license is needed for upgrade to new major release of WTA (e.g. to upgrade from 10.x to 11.x release) WTA 10.x aligns with LR14.x, WTA 11.x aligns with LR15.x.
6
Separate License is needed for each Technology (i.e. LTE, WCDMA, etc.)
© Nokia 2016
Nokia Internal Use
eDAT vs WTA eDAT is an internal tool that supports both Drive Test (i.e UE logs) and Call Trace data files WTA is an external tool (sold to customers) that only supports Call Trace data files WTA call trace source code is ported into eDAT Software development is common for both eDAT and WTA and is supported by DE Services R&D organization (led by Mustaquiem Kazi located in Bangalore) Funding is provided by Product organization - Dominique Morice (MN, LTE-A BBP OAM) 7
© Nokia 2016
Nokia Internal Use
WTA Information
WTA intranet site for internal users with GA release, pre-release information, feature descriptions, release notes, license info, WTA user guide etc. https://alu.tl/wta
WTA OLCS site for customers to download GA release, release notes
https://support.alcatel-lucent.com/products/9958-WTA
WTA Development SharePoint site https://alu.tl/wtasp
Engage – ask, discuss, answer and share https://alu.tl/wta-engage
Internal Users report problems via https://alu.tl/NavigatorHelpDesk
8
© Nokia 2016
Nokia Internal Use
AGENDA
Overview Product Support Roadmap Reference Material
9
© Nokia 2016
Nokia Internal Use
Product Support WTA aligns with LTE, WCDMA, Small Cell Product Release enhancements WTA also supports customer requested enhancements Product Manager : Philippe Picquet / Michel Chevanne (MN, LTE-A GPM) Program Manager : Dominique Morice (MN, LTE-A BBP OAM)
10
© Nokia 2016
Nokia Internal Use
Current Supported Releases WTA 11.3.x LTE Release : eNodeB 15.1L, MME WM9.x, SAM 13.0Rx, SGW 7.0Rx, TCE 7.2 WCDMA Release : LR15.3W Small Cell Release : LR15.1SC
WTA 10.3.x / 10.1.x LTE Release : eNodeB 14.xL, MME WM8.x, SAM 12.0Rx, SGW 6.0Rx, TCE 3.3 WCDMA Release : LR14.2W Small Cell Release : LR14.SCM
WTA 9.3.x / 9.1.x LTE Release : eNodeB 13.xL, MME WM7.x, SAM 11.0Rx, SGW 5.0Rx WCDMA Release : LR13.3W Small Cell Release : BCR4.3
11
© Nokia 2016
Nokia Internal Use
Customer Support
WTA user
Tier 1 Support (Welcome Center) AR AR
Tier 2 Support (RTS)
Tier 3 Support (GPS) AR
Tier 4 (WTA Team)
WG = Navigator Global Support 12
© Nokia 2016
Nokia Internal Use
WTA customers
Verizon
TELEFONICA MOVILES
AT&T
TELUS
SHENTEL
CHINA MOBILE
SPRINT-NEXTEL
CHINA UNICOM
Orange
CORPORACION NACIONAL DE (CNT)
AM WIRELESS URUGUAY S.A.
FASTLINK TELECOM
ANTEL PROVEEDOR 41510
CACTTUS
Etisalat Sri Lanka
GLOBE TELECOM INC
ICE NORGE AS
LG-Ericsson R&D
LGS INNOVATIONS LLC
TELECOM MOBILE LIMITED
13
© Nokia 2016
Confidential
AGENDA
Overview Product Support Roadmap Reference Material
14
© Nokia 2016
Nokia Internal Use
WTA 12.1 Release Features (June 2016)
Aligns with Releases : eNodeB 16.1L, MME WM10.x, SAM 14.0Rx, SGW 8.0Rx, TCE 8.1
Support for LR16.1L enhancements
New eNodeB Immediate Minimization of Drive Tests (MDT*) feature - Radio measurements and GPS position is reported by the UE through L3 messages in call trace files (* needs TCE Advance License)
Verizon SANE Support
VoLTE Analysis Enhancements
Trace Collection Entity (TCE) Enhancements – RF Trace updates
15
© Nokia 2016
Nokia Internal Use
WTA 12.2 Release Features (Oct 2016)
Aligns with Releases : eNodeB 16.2L, MME WM10.x, SAM 14.0Rx, SGW 8.0Rx, TCE 8.2
Support for LR16.2L enhancements
Nokia FSM (BBU – eNodeB) cell trace post processing (interface to L3DC) Dedicated License for Windows Server & Support
Additional VoLTE Analysis Statistics and Reports
Trace Collection Entity (TCE) Enhancements
16
© Nokia 2016
Nokia Internal Use
AGENDA
Overview Product Support Roadmap Reference Material
17
© Nokia 2016
Nokia Internal Use
Value Proposition
Faster troubleshooting
Enables significant time savings, thanks to a centralized execution of trace activation, data collection, retrieval, post-processing and pre-defined reports
Easier operations
Simplifies introduction of new network elements, software releases, user devices or features by helping to identify network issues rapidly
Reduced CapEx
Lowers the reliance on network analyzers or probes, which are expensive to purchase and to operate as they need to be installed on several network interfaces
18
© Nokia 2016
Nokia Internal Use
9958 WTA – LTE Architecture Analysis & presentation PGW
SAM
eNodeB
9958 WTA
eNodeB eNodeB(metro)
Devices
LTE Radio Access
Initiate CT
MME SGW
Evolved Packet Core
TCE
Retrieve CT Data
Delivery Excellence Tools
Use Cases Initiate call trace from WTA , automatically download and post process files in near real time For an active call trace, multiple users can subscribe to TCE to receive data in near real time For historical call trace files on TCE, search and download data for analysis 19
© Nokia 2016
Nokia Internal Use
WTA - LTE Call Trace Architecture Use Cases
Statistics /Metrics Message 5620 SAM / TCE
1.
Initiate Call Trace, automatically download and post process/analyze Call Trace files in real time
2.
Download and post process/analyze Call Trace files located on NEs or locally on your machine
9958 WTA Events
(eNodeB, MME )
8650 SDM - HSS
9471 MME eNodeB UE
7750 SR - PGW 7750 SR - SGW
PDN User Control CT
5780 DSC - PCRF 20
© Nokia 2016
Nokia Internal Use
Call Trace Initiation (eNodeB)
21
© Nokia 2016
Nokia Internal Use
Call Trace Initiation (MME)
22
© Nokia 2016
Nokia Internal Use
Call Trace Initiation (SGW)
23
© Nokia 2016
Nokia Internal Use
Call Trace Initiation (PGW)
24
© Nokia 2016
Nokia Internal Use
Message Flow view
User configurable coloring
Call Sequence Diagram displays call sequence in ladder form between different network elements
Summary view
Event: track key state change
Detail/Decoded view zoom into an individual message
25
© Nokia 2016
Nokia Internal Use
Message Explorer view
Additional Info : Key data on each message extracted
Summary view Same information as Message Flow view - in tabular format, allows filtering per column
Detail/Decoded view
zoom into an individual message
26
© Nokia 2016
Nokia Internal Use
Manage Files – Post Process Historical Call Trace files
Various filter criteria provided to search legacy call traces residing on TCE
27
© Nokia 2016
Nokia Internal Use
Other Views Supported Search, Filtering, Bookmarking capabilities
Various Statistics calculated based on captured data Analyzed metrics available in grid, scatter, histogram, etc.
28
© Nokia 2016
Nokia Internal Use
Pre-Define and Custom define report capability
Connect to remote NEs to download CT files
Call Trace Types Supported eNodeB (Management based) Cell Traffic trace Event based trace RF Trace Minimization of Drive Test (MDT) Trace MME Management based trace (IMSI or ALL UEs) Signaling trace (IMSI) IMSI is traced on MME and eNodeB SGW and PGW IMSI based trace 29
© Nokia 2016
Nokia Internal Use
Interfaces / Protocols Supported eNB (File Format : XML)
MME (File Format: PCAP) Interface
NEs
Protocol
RRC
S1-MME
MME - eNB
S1AP, NAS
eNB – MME
S1AP, NAS
S3
MME – SGSN
GTPv2-C
eNB – eNB
X2AP
S10
MME – MME
GTPv2-C
S11
MME – SGW
GTPv2-C
Sv
MME - MSC
GTPv2-C
S6a
MME – HSS
Diameter
S13
MME – EIR
Diameter
SLg
MME – GMLC
Diameter
Gn
MME – SGSN
GTP
SGs
MME – MSC
SGSAP
SLs
MME – MSC
LCSAP
Interface
NEs
Protocol
Uu
UE – eNB
S1-MME X2
30
© Nokia 2016
Nokia Internal Use
Interfaces / Protocols Supported PGW (Debug log file format : Text)
SGW (File Format : Text) Interface
NEs
Protocol
S5 / S8
SGW - PGW
GTPv2-C
S11
SGW - MME
GTPv2-C
Ga
SGW - CGF
Diameter
Interface
NEs
Protocol
S5 / S8
PGW - SGW
GTPv2-C
Gx
PGW - PCRF
Diameter
Ga *
PGW - CGF
GTP Prime
Gn *
PGW - SGSN
GTP
Gy *
PGW - OCS
Diameter
Rf *
PGW - OFCS
Diameter
* Activation only 31
© Nokia 2016
Nokia Internal Use
Statistics Explorer Call Trace Summary displays list of individual calls
Handover statistics reports available
32
© Nokia 2016
Nokia Internal Use
Allows to Plot message flow per call-id
Statistics Explorer – VoLTE Allows to Plot message flow per call-id
VoLTE Call Drop lists drop calls VoLTE Call Summary lists all calls
33
© Nokia 2016
Nokia Internal Use
RF Trace Support Call trace is a 3GPP compliant tracing mechanism - Scalability & interworking with probe was not a key requirement in the 3GPP design (TS 32.422/423) - Focus only on L3
RF Trace is a new tracing mechanism in eNodeB - It does not attempt to follow strictly 3GPP specification but rather to provide an efficient & scalable tracing mechanism
- L3 tracing redesigned to add important data not required by TS 32.322/323 and to remove redundancy with probe - Key metrics from L1/L2 are reported - Some user plane metrics are reported
RF Trace can be run simultaneously with call trace
34
© Nokia 2016
RF Trace Measurements Measurements L1 (DSP) RSSI
L2 (DLT) Rank Scheduled PRB
L2 (ULT) Power Head Room Pusch_sinr Tadv_type2
LCG/BSR Scheduled PRB
35
© Nokia 2016
eNodeB - RF Trace Initiation a new tracing mechanism (needs TCE Advance license) L1 data - RSSI L2 data - PHR, SINR, AoA, PRB, etc. L3 data - RRC, X2
1 Message Flow
36
© Nokia 2016
Nokia Internal Use
Analysis of MDT (Minimization of Drive test) Logged MDT is a new eNodeB feature (in LR15.1L) analysis of idle mode measurement. UE provides a log of radio measurement & GPS position. E2E view (call trace + logged MDT), showing the complete behavior of the UE WTA shows detailed view WTA correlates call trace MDT data for detailed study
37
© Nokia 2016
Nokia Internal Use
WTA support for eNodeB – Logged MDT Initiation
Support for Logged mode MDT (Minimization of Drive Tests) - needs TCE Advance license
E2E view of MDT related messaging in the network through Message Explorer and Message Flow views.
Supports initiation of MDT traces in the following configurations: MDT with eNB Call Trace MDT with eNB Call Trace and RF Trace
38
© Nokia 2016
Nokia Internal Use
MDT Initiation
eNodeB – Logged MDT Display
Metric Name: RSRP of Serving Cell ID MDT
39
© Nokia 2016
Nokia Internal Use
VOLTE – IMS Supported (prototype) Post processing and analysis of SIP messages from PCAP call traces collected by IMS network elements
Summary View
Detailed/Decoded View
40
© Nokia 2016
Nokia Internal Use
List of Messages Supported Generate the list of messages supported from Tools menu
Allows users to modify default setting from Tools menu
41
© Nokia 2016
Nokia Internal Use
Benefits Enables operators to address the challenge of diagnosing and troubleshooting complex issues via call trace data
Various views supported - Message Flow, Message Explorer views, Metrics Statistics, Reports
Trace activation performed from the Wireless Trace Analyzer versus having to perform traces from different systems or elements and locations, requiring additional coordination 42
© Nokia 2016
Traces the entire call signaling from inception to completion on ALU network elements (includes air interface)
WTA Benefits
Allows export of data in multiple formats
Nokia Internal Use
Interactive call trace activation & automated call trace data collection from network elements
No costly probes needed !
End to End troubleshooting of call trace data for multiple protocol layers. Includes decoding of Nokia proprietary messaging and 3GPP/3GPP2.
Use Cases The 9958 WTA efficiently addresses common problems such as identifying the reasons for subscriber authentication failures, and very complex ones requiring detailed protocol layers message decoding. The 9958 WTA is also extremely helpful for troubleshooting the behavior of new devices, or for performing in-depth analysis of call traces following a subscriber complaint. As it can combine trace analysis from multiple network elements, complex correlation of traditional probe-based traces is avoided. Introduction of a new network element, software release, or telecom feature may bring new problems that can only be identified with an end-to-end visibility of the exchanges over the different network interfaces. Handover execution in a wireless network is a critical part of a call, and can in many cases result in call drops or low Quality of Experience (QoE) perception. Detailed analysis of the handover preparation is essential to understanding the reasons behind the poor performance. WTA offers an efficient way to verify successful handoffs from one technology to another as well as analyzing failure causes. 43
© Nokia 2016
Nokia Internal Use
Near Real Time Call Trace (NRTCT) – TCE eNodeB, MME Near Real Time Call Trace (NRTCT) is supported with SAM/TCE configuration After initiating call trace, WTA subscribes with TCE to receive call trace data in near real time “CT Status” tab displays information about the Call Trace Initiation “CT Data Status” tab displays information about subscription with TCE Message Flow and Message Explorer views are auto populated with data received from TCE
44
© Nokia 2016
Nokia Internal Use
Near Real Time Call Trace (NRTCT) – WTA GUI Initiate eNodeB or MME Call Trace After successful Call Trace Initiation - CT Status tab display status of CT
After successful Call Trace Initiation - CT Data Status tab displays status of Subscription Session with TCE
45
© Nokia 2016
Nokia Internal Use
Call Trace Subscription with TCE With SAM/TCE configuration, multiple users can subscribe to receive ‘active’ call trace data for eNodeB or MME. Example: User #1 initiates call trace on eNodeB #1 Other users can now subscribe to receive call trace data for eNodeB #1 in near real time.
‘CT Data Status tab’ displays information about subscription with TCE Message Flow and Message Explorer views are populated with data received from TCE
46
© Nokia 2016
Nokia Internal Use
Call Trace Subscription with TCE User can subscribe to active TCE session or active call trace initiated from SAM GUI
47
© Nokia 2016
Nokia Internal Use
eNodeB Event Based Trace – Threshold parameters Traffic Threshold - Number of Connected UE ratio for the monitored eNB cell •
eNB monitors # of RRC connected UEs in 1min sampling interval
•
At the end of 1min interval, eNB calculates the connected UE percentage for each monitored cell and compares with the configured threshold value.
•
If the calculated value is lower than the configured value, eNB start collecting the trace data whenever a UE starts a call on the traced cell.
RRC Connection Re-establishment Threshold - number of RRC Connection Re-establishment attempts eNB received from UEs for the monitored cell •
eNB monitors # of RrcConnectionReestablishmentRequest received based on 1 min sampling interval
•
At the end of 1min interval, eNB compares the value of # of RrcConnectionReestablishmentRequest received, with the configured value.
•
If value for # of RrcConnectionReestablishmentRequest received is greater than the configured value then eNB start collecting trace data whenever a UE starts a call on the traced cell.
IRAT Handover Threshold - number of outgoing Inter-RAT Handover Redirection Attempts eNB sent to UEs for the monitored cell
48
•
eNB calculates the number of IRAT HO redirection 1min sample
•
eNB Compare it with the configured iratHOThreshold value for each monitored cell.
•
If the calculated value is greater than the iratHOThreshold value, then eNB start collecting trace data whenever a UE starts a call in the traced cell.
© Nokia 2016
Nokia Internal Use
9958 WTA – WCDMA Architecture Post-processing & analysis are done on user’s PC
Statistics /Metrics
WTA Call trace data are generated by the network elements
Events
9353 WMS
RNC
WTA retrieves call trace data via WMS 49
© Nokia 2016
Message
Nokia Internal Use
WCDMA Technologies Supported Supports call trace data captured by WCDMA RAN Includes CTg, CTa, CTb, CTN, CFT, OT: Cell, IuCS, IuPS, IuR, IuBC
End-to-End analysis of calls per 3GPP Specs Protocols: RRC, NBAP, RANAP, RNSAP Interfaces: Uu, IuB, IuR, IuPS, IuCS, IuBC
50
© Nokia 2016
Nokia Internal Use
9958 WTA – Small Cell Overview 9958 WTA
9958 WTA retrieves the 3GPP standard XML Call Trace Files from Small Cell Management System (SCMS) for the following three Network Elements: • Small Cell, Small Cell Gateway (SCGW) and Iu Protocol Converter (IPC) 51
© Nokia 2016
9958 WTA – WCDMA/Small Cell Architecture
Use Case
Download and post process/analyze Call Trace files located on NEs (SCMS or WMS) or locally on your machine
9958 WTA 9353 WMS NodeB
Iu-Cs
9370 RNC Uu
IuB
Iu-Ps
SC SCGW IuH
52
© Nokia 2016
GMSC
MSC/V LR SGSN
GGSN
Gn/Gp
lsup
MGW Gi
PSTN
PDN
Iu-Cs
Uu
SCMS
3G-
IPC Iu-Cs Iu-Ps Iu-Ps
Gr
HSS/EIR
Gc
User Control CT
9958 WTA – WCDMA/Small Cell Architecture (Contd.) Small Cell (aka Femto) Supports Small Cell, Small Cell Gateway (SCGW) and IP Protocol Converter (IPC) Call Trace files Supports Small Cell RF Trace files Interface (Protocols) supported are: •
53
© Nokia 2016
Small Cell : Uu (RRC), Iu (RANAP)
Nokia Internal Use
Supported Releases NE releases supported is available from Help menu
54
© Nokia 2016
Nokia Internal Use
WTA Client Hardware/Software Requirements Component
Minimum
Recommended
Supported
CPU
Core2 Duo
Core i5 Corei7
Same as OS support
RAM
2GB
4GB+
2GB+
OS
Windows 7
Windows 7
Windows 8 Server 2003/2008/2012 plus 64 bit editions of each
55
Hard Drive
10GB Free + Data Space 5400 RPM
100GB Free + Data Space 7200 RPM
Same as OS support
Display Resolution
1024x768
1600x1200
Same as OS support
Other SW
.NET Framework 4.5
.NET Framework 4.5
.NET Framework 4.
© Nokia 2016
Nokia Internal Use
WTA Software Installation WTA Software can be downloaded from OLCS website or WTA Verizon collaboration or FSA site for Verizon Launch WTA Software Click Start Click All Programs Click Nokia Click 9958 WTA Click 9958 WTA again
56
© Nokia 2016
Nokia Internal Use
