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1 nishio@cs.ritsumei.ac.jp : Proximity, short-range Precise, short-range WiFi Coarse, middle-range, PHS Coarse, wide-range GPS (Temporarily) Precise, wide-range : BKC FQDN ubi.cs.ritsumei.ac.jp : : vs K-anonymity!? : 1

2 Andy Hopper s Active Badge Infrared comm. Two buttons Personal identification Distributed receivers in the environment From Active Badge to Active Bat: Ultrasonic Location Sensing System From ActiveBadge To ActiveBat Cambridge University, Olivetti/Oracle Lab, AT&T Lab Andy Hopper Lab. User interface for space programming From ActiveBadge To ActiveBat First we watch 3 video clips. From ActiveBadge To ActiveBat Accurate location measurement Real-life implementation Rich equipment installation Various applications Mixture of real and virtual world User interface for space programming 2

3 GPS Fig.1 qpegps plot LAN Fig.2: Fig.1 Fig.2 WiFi WiFi (30 ) GPS 3

4 1 20m GPS 30m In-Campus Suburban-Area 3 Rectangle 2 GPS PlaceLab: Intel Research Seattle WiFi/GSM wardriving for localization Already mentioned Privacy-observant location system Social Experiments at Real Location-Aware House Sensor/device studies Social/ethnographic studies You can watch the presentation of Place Lab: Device Positioning Using Radio Beacons in the Wild displayevent.aspx?rid=4568 4

5 Place Lab CSL PlaceEngine WIDE Locky.jp Locky.jp Japan-version PlaceLab site Archive site for WiFi Access Point data Conducted by Nagoya Unive. Publishes wardriving tools for PC/WiFi +GPS PlaceEngine Sony CSL, then Koozyt Inc. WiFi signal-based localization Web service + client application on PC and SmartPhone ( + PSP) Web service API is published. Service recipient can add location labels Collective intelligence for WiFi Localization NearMe: Microsoft Research John Krumm and Ken Hinckley, "The NearMe Wireless Proximity Server", Sixth International Conference on Ubiquitous Computing (UbiComp 2004), September 2004, pp (PDF) NearMe: Features NearMe is a server, algorithms, and application programming interfaces (APIs) for clients equipped with wireless networking (Wi-Fi) to compute lists of people and things that are physically nearby. Server-based, several algorithms and APIs NearMe compares clients' lists of Wi-Fi access points and signal strengths to compute the proximity of devices to one another. Short range and long range One AP coverage and two which have overlapping coverage As NearMe is entirely based on proximity information it works "out of the box" with no calibration and minimal setup. Proximity location information advantages Not require any geometric calibration Absolute location is not necessary This morning, I found this has been introduced to coming Windows Vista. NearMe: Server and clients Clients: Register with proximity server Reporting Wi-Fi signatures Querying for nearby people and places Server: Wi-Fi signatures AP layout Range approximation algorithm Calculation with sets of pairs of AP s ID and RSSI 5

6 NearMe: Applications Binding people and places with URL Easy to implement clients Localized Detecting synchronous user operations GOMASHIO: Sensor Network Landmark GOMA: GPS SHIO: GOMA P GOMA SHIO (1/2) SHIO (2/2) r G b r G a G c 2r GOMA GOMA G a (x a, y a ) 3 G b (x b, y b ) 3 G b G a G c G c (x c, y c ) 2 SHIO 6

7 FreeBSD4.4R C GUI GPS 100x GOMA 10~50% % 10 90% 16 50% 5 90% 9 7

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