Wireless User Interface Components for Personal Area Networks

1. Wireless User Interface Components for Personal Area Networks Kenneth P. Fishkin Kurt Partridge Saurav Chatterjee 2002 IEEE PERVASIVE computing

2. Outline • Introduction • Spartan BodyNet(SBN) • Server • Notification ring • TiltType • Phicons • Orchestrating the user interface • Sample applications • Future works

3. Introduction(1/3) • Cheap，lowpower hardware and viable wireless transceivers had make ”wearable computer” possible. • Wearable systems composed of wireless modules，known as Wireless Personal Area Networks(WPAN).

4. Introduction(2/3) • A wireless wearable system：BodyNet 1.Size and location 2.Customization 3.Consolidation 4.Kinesthetics • Three additional benefits 1.Unobtrusiveness 2.Multiplicity 3.Transferability • When the components become multiple and wireless, users can capriciously pick them up, set them down, or hand them off, making them more transferable

5. Introduction(3/3) • WPANs do have some disadvantages • Less available power. • If two PAN components are near each other, are they part of the same PAN? • Data rates are reduced. • Needing a wireless protocol standard • Respect to range • Frequency spectrum • The Bluetooth wireless communication protocol has recently emerged to addres this

6. Spartan BodyNet

7. Spartan BodyNet_Server • The server is a 3650 iPAQ，with 32 Mbytes of RAM，16 Mbytes of ROM，and an optional 802.11b wireless LAN card • Only the processor，storage，and wireless connectivity are used

8. Spartan BodyNet_notification ring • To attact the user’s attention • Two LEDs，red and yellow • A touch on the ring lets the user turn notification off

9. Spartan BodyNet_TiltType(1/2) • A wrist-mounted device for displaying and entering messages

10. Spartan BodyNet_TiltType(2/2) • Dot motes allowed these components to communicate to each other • Measuring 2.6cm in diameter and is 8mm tall including the battery • 19.2kbps data rate

11. Spartan BodyNet_Phicons(1/3) • Its physical appearances are metaphors for their electronic capabilities • Phicons are easy to learn and remember • For particular purpose

12. Spartan BodyNet_Phicons(2/3) • With no physical connectors，there is no physical limit to the number of phicons that can interact with a system. • Phicons are also easily transferred from person to person(must be reassociated with the new user’s WPAN).

13. Spartan BodyNet_Phicons(3/3) • Phicons as an aid in authorization • When the WPAN detects the presence of an authorization phicon, its applications can provide a higher level of functionality • Requiring little hardware, so it can be samll • The phicon can also contain set data

14. Orchestrating the user interface • At any time, there is some set of user interface components known to the system • Their capabilities might disjoint, overlap, or even be identical • User interface modules send the application a checklist indicating which features they can support • SBN user interface modules, when discovered, announce their unique identifiers, and the host application determines when and how to best interact with that module

15. Sample applications(1/2) • This application involves trading stocks;a user enters a stock symbol, and TiltType displays that stock’s current value. • If the security phicon is present, then the user can specify an action to undertake with the stock

16. Sample applications(2/2) • A phicon can also be used in a WPAN as a data reference • Using WPAN phicons as a remote-control device • Phicons can let users temporarily lend sensitive information • TiltType can assist with entry of passwork or PINs • Hidden input scenario

17. Future work • Practicality • Form factors，power requirements，display characterisics，and so on • UI intermediary • WPAN UI components are used as intermediaries between two “faceless” components • Tangible transfer • Integrating the transfer of part of a WPAN from one user to another into the model.