I-Mode Performance Monitoring Use of ROOT in telecommunications at KPN
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1 I-Mode Performance Monitoring Use of ROOT in telecommunications at KPN Pieter Meulenhoff and Rob Meijer KPN Research, The Netherlands 1 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
2 Contents KPN/KPN Research Context I-Mode performance Monitoring ROOT Usage Future developments 2 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
3 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. 3 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
4 Standard Telecommuincations Network switch switch switch 4 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
5 Internet Event/Rules: Pick up the phone Away from computer Slam the door No answer 5 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
6 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 HTTP HTTP TCP, UDP IP IP IP, IP, ICMP ICMP IP, IPICMP TCP, UDP IP Data network Data network Data Data network network Data Data network network Data network 6 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
7 Measuring: Key Performance Indicators (KPI) Hits / second Webserver Environment Windows Management Instrumentation Agent Extracts KPI s from server CPU, HTTP Requests, Disk, Memory Storage in tree object Offline analysis Web servers Mediation CPU time Analysis 7 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
8 I-mode What performance is i-mode monitoring? 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 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
9 COMMERCIAL BRAKE 9 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
10 I-Mode Applications Ringtones Images Weather News Stocks Games Maps/Route/Travel Full Internet Access X-Rated Content 10 Pieter Meulenhoff KPN Research ROOT2002
11 I-Mode Platform Overview Service Platform GPRS Network i-mode Gateway Internet Content Website I-mode terminal What is the enduser experience? 11 Pieter Meulenhoff KPN Research ROOT2002
12 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? 12 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
13 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 13 Pieter Meulenhoff KPN Research ROOT2002
14 MLPA GPRS Network i-mode Gateway Service Platform Internet Content Website I-mode terminal Network Analyzer ROOT 14 Pieter Meulenhoff KPN Research ROOT2002
15 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 Pieter Meulenhoff KPN Research ROOT2002
16 Correlating TCP/IP and HTTP Traffic User initiated URL request Network Analyzer i-mode Gateway SP or CP TCP set- up delay ~Set-up Time Request response time ~Server side RTT Received URL ~GPRS RTT 16 Pieter Meulenhoff KPN Research ROOT2002
17 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/ ) 17 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
18 Standard MLPA monitoring & analysis process Network Analyzer TCPPacket Correlator Analysis Module Analysis Module Analysis Module Analysis Script Presentation Script Website ROOT Scripts TCPPacket Object TCPConnection Standard stored in ROOT TTree and Histograms HTTPTransaction and Profiles object stored in TTree SLA monitoring 18 Pieter Meulenhoff KPN Research ROOT2002
19 Real-time MLPA analysis process Packet Analyzer Packet Correlator Analysis Module Alarm / Event! (Network Management System) Realtime Event Based Operation Network Management 19 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
20 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) 20 Pieter Meulenhoff KPN Research p.j.meulenhoff@kpn.com ROOT2002
21 Demonstration 21 Pieter Meulenhoff KPN Research ROOT2002
22 ROOT Rapid Development through scripts Trees, Histograms, Profiles No modelling/simulation (outside root) 22 Pieter Meulenhoff KPN Research ROOT2002
23 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 23 Pieter Meulenhoff KPN Research ROOT2002
24 24 Pieter Meulenhoff KPN Research ROOT2002
25 25 Pieter Meulenhoff KPN Research ROOT2002
26 26 Pieter Meulenhoff KPN Research ROOT2002
27 27 Pieter Meulenhoff KPN Research ROOT2002
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