View
2
Download
0
Category
Preview:
Citation preview
THE INSTITUTE OF ELECTRONICS, IEICE Technical Report INFORMATION AND COMMUNICATION ENGINEERS
This article is a technical report without peer review, and its polished and/or extended version may be published elsewhere.
Copyright ©20 by IEICE
380-8553 4-17-1 ( ) 399-8303 7557-1
E-mail: fuwa@shinshu-u.ac.jp
GPS
LPWA LoRa
Research and Development of a Mountain Climber Observation System Yasushi FUWA Kouhei NOGUCHI Haruhiko NAKAMURA Yosihiro CYOUSOKABE
Yamato AMARI and David ASANO
Shinshu University 4-17-1 Wakasato, Nagano-shi, Nagano, 380-8553 Japan Circuit Design, Inc. 7557-1 Hotaka, Asumino-shi, Nagano, 399-8303 Japan
E-mail: fuwa@shinshu-u.ac.jp
Abstract Today there is a boom in mountain climbing, and we have developed a system for observing mountain climbers in response to the problem of increasing numbers of climbers requiring rescue. With this system, climbers are observed through server management of position information sent at fixed time intervals by terminals equipped with GPS carried by climbers. Most mountainous regions are outside the service area of mobile phones, and therefore it is necessary to construct new repeater networks in mountainous regions. However, many mountainous regions are designated as national parks, and there are difficulties with installing many repeaters. There is a need to cover an entire mountain, while installing in the mountains a minimum number of repeaters with long communication range operating with low power consumption using solar power. Furthermore, the communication network must exhibit no increase in packet loss when many climbers climb with terminals. This report provides an overview of the mountain climber observation system. It also describes issues for realization, and the new communication system we are currently developing to resolve those issues. Keywords Mountain Climber Observation System LPWA LoRa
GPS
29[1 ]
R
29( 30 6 21 [1 ]
292,583 3,111
354 20
58% 61%26% 73%
( , ) 29292 (
11%)
10
42016
7 2017 6 1 72017 10 24 )
egm
egmR
(GPS)
P
R
29
( 30 6 21
�� �� �� �� �� �� �� ��
(��
)��
( ) )) ( ) )) ( (
������ ) ( ( )��� ) ( ) ) ( )
��� �
���� �
1,631 1,6761,942 1,830
1,9882,172 2,293
2,508 2,495 2,5831,9332,085
2,3962,204
2,4652,713 2,794
3,043 2,9293,111
0
1,000
2,000
3,000
4,000
620621
622623
624625
626627
628629
7 5 8925 4
7 5( ) 8925(3)
281
317
294
275284
320311
335
319
354
250
300
350
400
620621
622623
624625
626627
628629
12,0 25 4
8925(3) 12,0 2
R 7 R
R R
R
ID
(2) (4)
R a R
R
egmR
L
A
G
1
A P
R W
L
g R P
W
P
A P R p
- egm
3.3
(1)
(2)1
egmR
G G G G
G G GP S
G G
Internet
中継機 中継機
中継機
中継機
発信機を持った登山者定期的に位置情報を発信
最小限の中継機で山全体をカバー
市街地の中継機まで登山者の位置情報を転送し、Internetを経由してサーバへ
発信機を持った登山者定期的に位置情報を発信
発信機を持った登山者定期的に位置情報を発信
発信機を持った登山者定期的に位置情報を発信
Internet中継機
中継機
中継機中継機
最小限の中継機で山全体をカバー
市街地の中継機まで登山者の位置情報を転送し、Internetを経由してサーバへ
サーバ
サーバ
(3) (1) (2)
LPWA(Low Power Wide Area)LPWA LoRa
L
150MHz
900MHz 2.4GHz
RadioMobile Ver.11.6.6 NASA SRTM3Ver3
920MHz,429MHz,146MHz
0dB dipole
3m 1.5m 2.14dBi
-130dBm 10mW Forest 70%
150MHz
L
LoRa
LPWA
LoRaWAN MAC
Device1 Gateway
Class A,B,C
ARIB
LPWA
[2][3 ]
5. p
l o
(a)LoRa(900MHz��10mW)������
(b)LoRa(400MHz��10mW)������
(c)LoRa(150MHz��10mW)������
10Km
1.5
R R L
LoRa
GPS
L
300mm
32 x 21 x 95 mm 54g 650mAh( ) 10 GPS 3
1 GPS 2 50mW( )
-133dBm LoRa
6 500mW( ) -133dBm LoRa
e R
2,200m
8km
3 GPS
(a)
(b)
(a)
150MHz
( R
)
[1] ” 29”
https://www.npa.go.jp/publications/statistics/safetylife/chiiki/300621yama_nennpou1.pdf Jun. 2018. [2] David ASANO, Daichi KUROYANAGI, Hikofumi SUZUKI, Eiki MOTOYAMA, Yasushi FUWA, “A Pseudo-TDMA MAC Protocol Using Randomly Determined Transmission Times for Landslide Prediction Wireless Sensor Networks”, IEICE Transactions on Communications, E97-B, 7, 1449-1456, 2014. [3] , , , “
”, , pp.163-168,
ASN2017-112, Jan.2018.
��� ���������
egm
e
55231 4 6
Recommended