IoT device positioning service: GPS, mobile base station, WiFi

Portal: 5 video presentations, 30 scene cases

Alibaba Cloud IoT enterprise Internet of Things platform provides auxiliary services for device positioning based on GPS, mobile base stations, WiFi hotspots and other information. Manufacturers can choose different positioning schemes according to the actual situation of the device.

GPS positioning scheme

Reference Documents https://help.aliyun.com/document_detail/108675.html

Time object model for equipment using GPS positioning - Description of geographical location attributes

Example of reported data on the device side

Topic：

/sys/{productKey}/{deviceName}/thing/event/property/post

Payload：

{
"id":"123",
"version":"1.0",
"params":{
"GeoLocation":{
"value":{
"Longitude":115.2334,
"Latitude":39.4563,
"Altitude":235,
"CoordinateSystem":2
}
}
},
"method":"thing.event.property.post"
}
WiFi hotspot location scheme

Physical model - event description

Example of device location communication through WiFi:

Topic：
/sys/{productKey}/{deviceName}/thing/event/LocationInfo/post
Payload：
{
"id":"123",
"version":"1.0",
"params":{
"mmac":"4c:48:da:26:ea:d9,-56,iot",
"macs":"4c:48:da:26:ea:d8,-56,iot|e6:a4:71:6e:45:83,-58,iot-LV4mshO"
},
"method":"thing.event.LocationInfo.post"
}
Cellular Base Station Positioning Scheme

Physical model - event description

For non CDMA base stations, the device reports data for example:

Topic：
/sys/{productKey}/{deviceName}/thing/event/LocationInfo/post
Payload：
{
"id":"123",
"version":"1.0",
"params":{
"imei":"352315052834187",
"smac":"E0:DB:55:E4:C7:49",
"cdma":"0",
"bts":"460,01,40977,2205409,-65",
"nearbts":"460,01,40977,2205409,-65|460,01,40 977,2205409,-65|460,01,40977,2205409,-65"
},
"method":"thing.event.LocationInfo.post"
}

CDMA base station, equipment report data example:

Topic：
/sys/{productKey}/{deviceName}/thing/event/LocationInfo/post
Payload：
{
"id":"123",
"version":"1.0",
"params":{
"imei":"0000",
"smac":"E0:DB:55:E4:C7:49",
"cdma":"1",
"bts":"13824,1,1838,1674723,575739,-52"
},

"method":"thing.event.LocationInfo.post"
}

Cloud business system obtains device location API

The business system calls QueryDevicePropertyData to query the location of IoT devices

The business system queries the location information of specific devices through QueryDevicePropertyData API

CommonRequest request = new CommonRequest();

1:request.setSysMethod(MethodType.POST);

2:request.setSysDomain("iot.cn-shanghai.aliyuncs.com");

3:request.setSysVersion("2018-01-20");

4:request.setSysAction("QueryDevicePropertyData");

5:request. putQueryParameter("RegionId", "cn-shanghai");

6:request. putQueryParameter("StartTime", "1618330349204");

7:request. putQueryParameter("Identifier", "GeoLocation");

8:request. putQueryParameter("Asc", "0");

9:request. putQueryParameter("EndTime", "1629330349204");

10:request. putQueryParameter("PageSize", "10");

11:request. putQueryParameter("IotInstanceId", "iot-068a03kg");

12:request. putQueryParameter("ProductKey", "g7palBDnzmT");

13:request. putQueryParameter("DeviceName", "dk003");

CommonResponse response = client.getCommonResponse(request);

Return value:
{
"RequestId": "C56790F8-AC96-492C-BA86-D7F57F090795",
"Data": {
"NextValid": false,
"NextTime": 1619330564810,
"List": {
"PropertyInfo": [
{
"Value": "
"Time": 1619330564811
}
]
}
},

"Code": "",
"Success": true
}

Equipment geography release marke.