Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003...
Transcript of Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003...
![Page 1: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/1.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 1
Diploma thesis presentation3 June 2003
Juha SirkkaOy L M Ericsson Ab
![Page 2: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/2.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 2
Configuration, verification and optimisation of handover functionality in UMTS/GSM network
• SupervisorProfessor Sven-Gustav HäggmanS-72, Communications laboratory
• InstructorAnssi Kulju M.Sc.Oy L M Ericsson Ab
![Page 3: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/3.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 3
Agenda
• Introduction (background, motivation, scope, objectives)• Literature review• Configuration• Verification and troubleshooting• Conclusions• Further study
![Page 4: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/4.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 4
Background
Research carried out atGlobal Services Delivery Center (GSDC) Helsinki
• Support organisation for market units in Europe
• Provides technical competence services such as network integration, software supply, support etc.
![Page 5: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/5.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 5
Motivation
• Commercial 3G launches in Europe – 2003• Operators have significant investments in 2G
(not many ”greenfielders”)• Coverage extension achieved with GSM
Seamless UMTS – GSM interwork placed high on operators’ priority list
![Page 6: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/6.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 6
Scope
Inter radio access technology handover (IRATHO) of one circuit switched (CS) conversational radio access bearer (RAB) from UMTS to GSM
• No inter RNC mobility• No packet switched traffic• No idle mode behaviour
• Basic functionality, activating the UMTS – GSM interwork
![Page 7: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/7.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 7
Objectives
Find an efficient way to:
• perform the feature activation of IRATHO in a combined UMTS/GSM network,
• verify the succesful feature activation,• perform troubleshooting to ensure the succesful feature
activation.
![Page 8: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/8.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 8
Literature review
• Network overview (UTRAN, GSM RAN, core network)• Signalling interfaces and protocols (RANAP & RRC !)• Handover, basic concepts• IRATHO theory and a detailed example
• Mostly interpreting 3GPP technical specifications and comparing it with Ericsson documentation
![Page 9: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/9.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 9
Configuration, core network & GSM RAN
• Establishing the connection between 3G and 2G• Ensuring that GSM can work as a target system
![Page 10: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/10.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 10
Configuration, UTRAN
• Basic configuration:Measurement & handover triggersRetry parameters
• Cell relations:External GSM cellsCell relations
![Page 11: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/11.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 11
Verification and troubleshooting
• Presenting the test arrangement
• Step-by-step verification, showing that necessary conditions are met
• Preferred workflow presented for troubleshooting- Measurement phase- Relocation preparation and execution phase
![Page 12: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/12.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 12
Test arrangement
• Uu/Um interface via cables or over the air
• In both cases separate attenuators for 3G and 2G
• Monitors for UE and RNC
![Page 13: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/13.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 13
Conclusions
• Configuration process:
• Troubleshooting flowcharts:
• Literature review gathers up the background information on subject
![Page 14: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/14.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 14
Further study
Optimisation of IRATHO
• Tuning:Handover preparation and execution
• Follow up:Counters, measurements and subscriber feedback
• Creation of technical feedback for tuningfrom follow up information
Tuning Follow up
Feedback
![Page 15: Diploma thesis presentation 3 June 2003 - · PDF fileDiploma thesis presentation 3 June 2003 ... integration, software supply, support etc. ... • No inter RNC mobility](https://reader031.fdocuments.us/reader031/viewer/2022030409/5a916eac7f8b9af27f8e4ae5/html5/thumbnails/15.jpg)
Rev A LMF/R/G/A/D Juha Sirkka3.6.2003 15
Questions?