1 Pieter Meulenhoff KPN Research ROOT2002 I-Mode Performance Monitoring Use of ROOT in telecommunications at KPN Pieter Meulenhoff and Rob Meijer KPN Research, The Netherlands

2 Pieter Meulenhoff KPN Research ROOT2002 Contents KPN/KPN Research Context I-Mode performance Monitoring ROOT Usage Future developments

3 Pieter Meulenhoff KPN Research ROOT2002 What is KPN (Research) ? Royal Dutch Telecommunications Company KPN Research –R&D organisation of KPN –350 People (average age 29 years) –To become part of TNO, the Netherlands organisation for applied scientific research.

4 Pieter Meulenhoff KPN Research ROOT2002 Standard Telecommuincations Network switch

5 Pieter Meulenhoff KPN Research ROOT2002 Event/Rules: Pick up the phone  … Away from computer  … Slam the door  … No answer  … Internet

6 Pieter Meulenhoff KPN Research ROOT2002 Understanding Large Telco Infrastructures Systems grow complex –Measure what is going on Systems are in a hostile environment –Measure who is doing what from where –Correlation between different layers Data network IP, ICMP Data network IP, ICMP Data network IP, ICMP TCP, UDP HTTP Data network IP Data network IP Data network IP TCP, UDP HTTP Data network IP

7 Pieter Meulenhoff KPN Research ROOT2002 Measuring: Key Performance Indicators (KPI) Webserver Environment Windows Management Instrumentation Agent Extracts KPI’s from server CPU, HTTP Requests, Disk, Memory Storage in tree object Offline analysis Analysis Mediation Web servers Hits / second CPU time

8 Pieter Meulenhoff KPN Research ROOT2002 What is i-mode ? Wireless Internet via Mobile Phone –Web Browsing – Introduced in Japan by NTT DoCoMo in 1999 (now 30 million subscribers) Introduced in Germany, Netherlands, Belgium in 2002 I-mode performance monitoring

9 Pieter Meulenhoff KPN Research ROOT2002 COMMERCIAL BRAKE

10 Pieter Meulenhoff KPN Research ROOT2002 I-Mode Applications Ringtones Images Weather News Stocks Games Maps/Route/Travel Full Internet Access X-Rated Content

11 Pieter Meulenhoff KPN Research ROOT2002 I-Mode Platform Overview I-mode terminal GPRS Network Internet Content Website i-mode Gateway Service Platform What is the enduser experience ?

12 Pieter Meulenhoff KPN Research ROOT2002 I-Mode Management Issues When do we have to upgrade the capacity of our i-mode gateway ? Is a change in quality caused by i-mode service platform, Internet, GPRS network ? What is the quality of our service compared to one day, week, month or year ago ?

13 Pieter Meulenhoff KPN Research ROOT2002 GPRS Network I-Mode is based on the GPRS Network Faster data transfer Packet Switched Network –Mobile phone ‘has’ IP-Number –Always on –‘You only pay for data transferred’

14 Pieter Meulenhoff KPN Research ROOT2002 ROOT MLPA I-mode terminal GPRS Network Internet Content Website i-mode Gateway Service Platform Network Analyzer

15 Pieter Meulenhoff KPN Research ROOT2002 MLPA Multi Layer Packet Analysis Capturing and Storage of: –timestamped TCP/IP Headers –timestamped HTTP Headers Correlating TCP/IP and HTTP –HTTP ‘transactions’ Calculation of –‘End-to-End’ response times Responsetime as experienced by user –HTTP arrival rates –tcp/ip quality –...

16 Pieter Meulenhoff KPN Research ROOT2002 Time Network Analyzer User initiated URL request Received URL i-mode Gateway SP orCP Request response time ~Server side RTT ~GPRS RTT ~Set-up TCP set-up delay Time Network Analyzer User initiated URL request Received URL i-mode Gateway SP orCP Request response time ~Server side RTT ~GPRS RTT ~Set-up TCP set-up delay Correlating TCP/IP and HTTP Traffic

17 Pieter Meulenhoff KPN Research ROOT2002 Technical MLPA details: Software 1. Packet Analyzer –Save time-stamped TCP/IP and HTTP Header information 2. Packet Correlator –Calculate TCP/IP to HTTP Correlation TCP Connections HTTP Transactions 3. Analysis modules HTTP request arrival rates HTTP response throughput End-to-end HTTP response time (time-plots, distributions, statistics) TCP statistics –Retransmissions, fragmentation, connection setup time 4. Presentation Module –Convert analysis results to html format –… (presentation to other output formats/databases/…)

18 Pieter Meulenhoff KPN Research ROOT2002 Standard MLPA monitoring & analysis process TCPPacket Object stored in TTreeTCPConnection and HTTPTransaction object stored in TTree Standard ROOT Histograms and Profiles SLA monitoring ROOT Scripts

19 Pieter Meulenhoff KPN Research ROOT2002 Real-time MLPA analysis process Packet Analyzer Packet Correlator Analysis Module Alarm / Event! (Network Management System) Realtime Event Based Operation Network Management

20 Pieter Meulenhoff KPN Research ROOT2002 Implementation Installation –Attached to ‘monitoring port’ of incoming/outgoing router (G i interface between GGSN and i-mode gateway). Software –Database, Object I/O: ROOT ( –Network Analyzer: Libpcap (ethereal, tcpdump) –Graphics conversion: Imagemagick –Administration: ssh Supported operating systems –Unix based (Linux, Solaris) –W2K Security options –TCP/IP anonimisation –HTTP header cleanup (XID,Cookies,Content,Form Variables)

21 Pieter Meulenhoff KPN Research ROOT2002 Demonstration

22 Pieter Meulenhoff KPN Research ROOT2002 ROOT Rapid Development through scripts Trees, Histograms, Profiles No modelling/simulation (outside root)

23 Pieter Meulenhoff KPN Research ROOT2002 Results & Future Work Performance Improvements –Detection of bugs in TCP stack software –Comparison between different terminals (speed) –Network optimisation –Future versions of platform/terminals –Many more Introduction in operational environment –Realtime alarm generation –Connection to network management software SNMP, SOAP,... –Stabillity

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