NATO Advanced Study Institute on Mining Massive Data Sets for Security

Geolocalisation in Cellular Telephone Networks

author: Bruce Denby, Université Pierre et Marie Curie

Description

Cellular telephone operators are currently required to provide caller localisation information for use by emergency services. Localisation fields appended to Call Detail Records can now also be exploited for commercial purposes, such as: new network services; subscription fraud detection; customer behaviour monitoring; health care monitoring; law enforcement and forensics; and national and international security. The talk reviews cellphone localisation technology via: 1. A survey of location based services and applications; 2. An overview of localisation techniques with an example; 3. A GSM trace-mobile demonstration of types of information available

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*Slides*
0:00	Geolocalisation in Cellular Telephone Networks
0:31	Plan of Presentation
1:54	What is Cellphone Localisation?
2:59	Why Localise Cellphones? Emergency Services
5:05	Why Localise Cellphones? Location Based Services
6:27	Why Localise Cellphones? Health Care and Family Security
7:44	Why Localise Cellphones? Customer Behaviour Monitoring
8:35	Why Localise Cellphones? Law Enforcement and Forensics
10:12	Why Localise Cellphones? National and International Security
11:55	Plan of Presentation
12:01	How do Cellphones Work, Anyway?
15:47	Call Detail Records
16:42	Modern CDR Databases
17:55	Plan of Presentation
18:06	Cellphone Localisation Methods
19:02	Can’t We Just Use GPS?
19:55	Cellphone GPS Reception
20:54	Radio Interface Techniques
21:45	Radio Interface Techniques Cell ID
22:42	Radio Interface Techniques Cell ID+TA
23:44	Radio Interface Techniques “Triangulation”
25:01	Radio Interface Techniques Angle of Arrival AOA
25:43	Multipath and Mask Effects
26:24	Plan of Presentation
26:28	Database Correlation Technique
29:05	Database Correlation Technique Example Measurement Report
29:42	Database Correlation Technique Localising w/Radio Fingerprints
30:32	Database Correlation Technique Fingerprinting Challenges I
32:26	Database Correlation Technique Fingerprinting Challenges II
33:42	Database Correlation Technique Experiment
34:58	Database Correlation Technique Experiment – Trace Routes
35:15	Database Correlation Technique Experiment – Analysis Techniques
36:09	Database Correlation Technique Experiment – Preliminary Results
37:59	Database Correlation Technique Experiment – Trace Routes
38:17	Database Correlation Technique Experiment – Preliminary Results
38:21	Database Correlation Technique Indoor Fingerprint Localisation
40:35	Database Correlation Technique WiFi Indoor Fingerprint Localisation
42:26	Database Correlation Technique Hybrid Method: Assisted GPS
43:05	Plan of Presentation
43:10	Standard LCS CDR Entry
44:06	Subscriber and Equipment Tracing
45:27	Plan of Presentation
45:30	Demonstration: GSM Trace Mobile
55:12	Acknowledgements
55:19	Comments, questions?
59:44	- Questions

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