| Conference |
| Type of Publication |
| A Measurement Study on 802.11 Concurrently Used for
Positioning and Communications |
| Title |
|
|
| Authors |
| Proc. of the Third International Symposium on
Wireless Pervasive Computing (ISWPC 2008), pp.
610-615, Santorini, Greece, May 2008 |
| Published in |
| Not only the communication capabilities of
802.11, but also the capability to determine the position of
mobile devices make 802.11 highly appealing for many application
areas. Typically, a mobile device that wants to know its position
regularly performs active or passive scans to obtain signal
strength measurements of neighboring access points. Active and
passive scanning are survey techniques originally intended to be
performed once in a while to learn about the presence and signal
reception quality of access points within communication range.
However, so far, no investigations are known to have been
launched into how regular scanning affects concurrent data
transmissions from an end-user point of view. In this paper, we
explore how common data communication is affected while actively
or passively scanning at the same time. We found that with an
active scanning interval of equal or greater than two seconds the
network conditions such as throughput and round trip delay are
sufficient for interactive network applications. The use of
passive scanning is prohibitive while simultaneously performing
interactive data communication due to communication dropouts of
more than 1.3 seconds during each scan. |
| Abstract |
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