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校園手機導覽系統 campus tour system for cell phone. 指導教授 : 劉如生 教授. 報告者 : 陳威伸 曾梓瑄. Outline. Introduction Why we need campus tour system(CTS) ? Where can CTS be used ? Related work System Architectures System Implementations Outdoor Indoor The rules of indoor positioning Demo Conclusion. - PowerPoint PPT Presentation
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報告者 : 陳威伸 曾梓瑄
Introduction› Why we need campus tour system(CTS) ?› Where can CTS be used ?
Related work System Architectures System Implementations
› Outdoor› Indoor
The rules of indoor positioning Demo Conclusion
Get lost in campus Go to the destination directly Save time for finding a path …
CTS can be used in the whole campus even inside the building
RSS(Received Signal Strength) algorithm
With GPS signal, the phone will obtain the latitude and longitude.
BSSID
Our cell phone will receive the information about access points.› Use WLAN Scanning module.
BSSID: MAC address of the access point.
Rx_Level: Reception level in dBm .
Rule 1: Find out the five strongest Access Point to compare with the first database (DB1).
Rule 2: Use a heavy-weighted method.
Part of DB1
Access points Floor numbers
00:13:C3:65:B7:50 1 and 2
00:13:C3:65:BE:80 1 and 2
00:04:E2:D6:AC:39 1 and 2
00:13:46:9A:8F:8C 1
00:16:B6:94:12:EB 1
Floor 1
Part of DB2signal strength
Access points user 101 103
00:13:C3:65:B7:50 47 60.5 43
00:13:C3:65:BE:80 57 68 53.5
00:04:E2:D6:AC:39 79.5 70.5 X
00:13:46:9A:8F:8C 82 76.5 86
00:16:B6:94:12:EB 80 X 82
103
Hardware
Software
Provide a positioning system to tourists or people who are not familiar with YZU.
Combine indoor and outdoor positioning.