DopLink

Abstract

Mobile and embedded electronics are pervasive in today's environment. As such, it is necessary to have a natural and intuitive way for users to indicate the intent to connect to these devices from a distance. We present DopLink, an ultrasonic-based device selection approach. It utilizes the already embedded audio hardware in smart devices to determine if a particular device is being pointed at by another device (i.e., the user waves their mobile phone at a target in a pointing motion). We evaluate the accuracy of DopLink in a controlled user study, showing that, within 3 meters, it has an average accuracy of 95% for device selection and 97% for finding relative device position. Finally, we show three applications of DopLink: rapid device pairing, home automation, and multi-display synchronization.

Cross-Device Taxonomy

“…How to use the tracking classification: Selecting an appropriate cross-device tracking technology is a challenging task -even for experts in the field. The choice follows several considerations weighing the benefits of outside-in tracking that provides high fidelity information as opposed to a more Distance without cross-device synchronization [258] , motion-resistant distance calculation [378] Relative 2D positioning using custom ultrasound dongles [123,97] Absolute 3D positioning on unmodified mobile phones [159] , conceptual relative 3D positioning on static mobile phones [267] , [159] user-generated Doppler-based gesture recognition between 2 phones [50] , Doppler-based multi-device selection [6] , swiping between devices on surface [103] , relative positioning from ambient sounds [327] , positioning from ambient sounds [137] capacitive capacitive…”

“…development framework, toolkit, middleware) [124,145,152,174,193,235,243,304,328,373] → of an interaction technique [54,66,94,118,147,186,300,322,374] → of a theoretical framework; constructiveconceptual [245,316,324] → focus groups and workshops [59,158,179,245,246,283,306] → design sessions and co-creation [234,283] → other informal & early demonstrations [128,138,279,303,363] Technical evaluation (66) → performance, compared to other systems [159,227,269,320,333] → quality measurements (e.g. accuracy of tracking) [6,7,47,54,55,103,…”

“…time, frequency, FPS, round trip time, memory, etc.) [6,47,103,255,258,270,282,320,339,378] Heuristic evaluation (5) → as only evaluation method [173,174] → together with qualitative user studies [197,353] → together with case studies [304] → qualitative user study based on heuristic criteria [236] physical and digital coloured borders are used to indicate connectivity [116,206,271,351,358]. Visual proxies or portals on or around devices are used to visualise what device owns which information [24,64,89,97,123,143,203,357,358], and cross-device portals help users identify the boundaries between devices [143,206].…”

Do That, There

“…Users pointed at objects ("that one there") and then confirmed their selection by pressing a button on the stylus. DopLink [5] also let users direct input by pointing at a device, using flick-gestures rather than button presses for selection. PI-COntrol [40] allowed users to interact with distant objects by aiming a pico projector at them.…”

Ubiquitous WiFi and Acoustic Sensing: Principles, Technologies, and Applications

“…After obtaining the WiFi or acoustic signal, the next step is to characterize it using various sensing techniques. Similar to WiFi sensing, typical applications based on acoustic sensing include daily actions monitoring [73][74][75][76][77][78] , gesture and hand movements recognition [79][80][81][82][83][84][85][86][87] , health caring [88][89][90][91][92] , localization and navigation [93][94][95][96][97][98] and privacy and security [99][100][101][102][103][104][105][106][107][108][109][110][111] . In the following, we will also introduce the basic content of signals and other characterization methods.…”