-
*
*Email: [email protected]
(Location Based Service,
LBS)LBS
(Global Positioning System, GPS)
GPS
(Pattern matching
method)
WiFi
1. 1.1
(LBS)
GPS
GPS
(Line Of SightLOS) [1][2]
GPS
GPS
2000 RADAR(Radio
Detection and Ranging) [9]RADAR
ZigBee
(Received Signal Strength Indicator, RSSI)
(Blind Node)(Reference Node)
AP(access point)
AP
1.2
AndroidiOS
Android
Wi-Fi
AP
Wi-Fi
2. 2.1
(Global Positioning System
GPS)
GPS
24
GPS
[8] GPS
1
1. GPS
94
2015 Conference on Information Technology and Applications in Outlying Islands
-
(Xd , Yd)
(Xa ,Ya)(Xb,Yb)(Xc ,Yc)
dadbdc
( 1)
( )2 + )2 =
( )2 + )2 =
( )2 + )2 =
( 1)
GPS
GPS
(Line of
sightLOS)
[9]
2.2 RADAR
RADAR (Radio Detection and
Ranging) [8][9] Microsoft 2000
IEEE INFOCOM 2
X1,Y1RSSI1RSSIn
Xn,YnRSSI1RSSIn
Off-line phase
On-line phase
Measure RSSI
PatternMatching
Estimated Location
2.
RADAR(offline)(on-line)
(Access Point, AP)
(Euclidean
Distance)
(Pattern Matching)
RADAR
[10]( 2)
CnWWAFC
CnWWAFnW
d
dndPdP
o
o)log(10)()(
( 2)
P(d)P(d0)
d d0
n
nWCWAF
WAF
2.3 ZigBee
ZigBee
(Reference Node)(Blind
Node)(Coordinator)
USB
ZigBee
ZigBee
( 3)
RSSI = [10n log10 (d
d0) + A] ( 3)
RSSIn
ddo
A
ZigBee
ZigBee
[3]
ZigBee
3
3. ZigBee
95
2015 Conference on Information Technology and Applications in Outlying Islands
-
2.4 iBeacon
iBeacon Apple
(Bluetooth)
(Received Signal Strength Indication,
RSSI)
iBeacon
iBeacon( 4) 4
( 4)
RSSI0 d
nd0
4. iBeacon[10]
3.
3.1
Wi-Fi
Wi-Fi
(Access point)
A
AP
AP1AP2AP3AP4
AP1 AP4
90
30 20
AP
5
AP AP
AP AP
User Radio Map Database
5.
Matlab( 5)
= 22 + 1 + 0 ( 5)
t APy
AP
210210 Radio Map Database
6.
NO
RSSI
YES
Radio Map Database
6.
B
Wi-Fi
7
96
2015 Conference on Information Technology and Applications in Outlying Islands
-
AP AP
AP AP
User Radio Map Database
7.
Radio Map
AP
210 Radio Map Database
8
AP RSSI
AP
Radio Map
Radio Map
8.
3.2
33 12
9
4AP
9. [5]
3.3
3.3.1
A.
90
90
AP
AP
AP1(AP1H)
AP2(AP2L)AP1
(AP1L) AP2(AP2H)AP1
(AP1H) AP3(AP3L)
AP1(AP1L) AP3
(AP3H)
2.5dbm
0.656dbm
B.
AP AP
3.3.2
AP
T1 AP
APT2 AP
APT3 AP
APMatlab Polyfit
y = 22 + 1 + 0
y
210
2=0.92111= -138078 0=56.7241(
10.)2=0.10921= -5.2162
0=66.4568( 11.)
y
97
2015 Conference on Information Technology and Applications in Outlying Islands
-
210
AP
10. Point7-Point12-(AP1-AP2)
11. Point1-Point16-(AP2-AP3)
HTC Sensation XL
Matlab Polyfit
210
Samsung Galaxy Nexus
1.913
4. Wi-Fi
Wi-Fi
Samsung Galaxy NexusHTC
Sensation XL
AP1 AP4 90 1
AP1
4.89dbmAP2 4.9dbm
AP3 7.04dbmAP4
5.78dbm
AP 12131415
12. AP1
13. AP2
14. AP3
15. AP4
98
2015 Conference on Information Technology and Applications in Outlying Islands
-
AP
1 2 3
AP
2.5dbm
0.656dbm
1. (1)
2. (2)
3. (3)
5.
Radio Map
AP
MOST 103-2221-E-130 -024
[1] , , ,
, , Vol. 131, pp.
126-135,
[2] , , ,
(LBS)
,
, ,
[3] ,,,
(2),
, ,
[4], ,
,
[5] , ZigBee
,
,
[6] , RSSI
,
, 103
[7] Chin-Tseng Huang, Cheng-Hsuan Wu, Yao-Nan
Lee, Jiunn-Tsair Chen, A Novel Indoor
RSS-Based Position Location Algorithm Using
Factor Graphs, IEEE Transactions on Wireless
Communications, Vol. 8, pp. 3050-3058, June
2009.
[8] Mc Neff, J.G, The global positioning system
IEEE Transactions on Microwave Theory and
Techniques, Vol. 50, pp 645 - 652, March 2002.
[9] P. Bahl and V.N. Padmanabhan, RADAR: An
in-building RF-based user location and tracking
system, Proceedings of IEEE INFOCOM 2000,
March 2000.
[10] iBeacon
http://www.elvistek.com/docs/Introduction_to_E
lvisTek's_Ibeacon_solution_for_Customer.pdf
99
2015 Conference on Information Technology and Applications in Outlying Islands
A2-7
