Long-Range Wireless Sensor Networks for Geo-location Tracking: Design and Evaluation
- 1. Long-Range Wireless Sensor Networks for Geo-location Tracking: Design and Evaluation Ahmad Muzaffar bin Baharudin, Wanglin Yan Graduate School of Media & Governance Keio University, Japan muz@keio.jp 18th International Electronics Symposium (IES) Bali, Indonesia, 29-30th September 2016
- 2. Presentation Outline • Introduction • Research Objective • Comparison of Long-range Wireless Technology • Proposed Geo-location Tracking System • System Deployment and Experiment • Experimental Results • Conclusion 1
- 3. Introduction • Tracking dynamic objects such as animals, human or vehicles is an important mission in the real world Internet of Things (IoT) system. • “Geo-location” tracking oGatheringthe geographical location of movingobjects oBy acquiring temporal geo-location information (geo- data), the objects’ trails and behaviors can be visualized and analyzed 2 Geo-location Tracking Data Aggregation Wireless Data Transmission
- 4. Research Objective • Long-range Wireless Sensor Networks System for geo-location tracking oTo design a long-range WSN with geo-location tracking capability,operatingin real-time manner oTarget application: Livestock animalstracking 3 Livestock Grazing Field Gateway Gateway
- 5. Location and Geo-location Tracking • GPS-less location tracking oMerit: Localization method and light sensor can be leveraged to reduce sensor node’s form factor, cost and energy consumption. oDemerit: Difficult to obtain accurate data. • Geo-location tracking using GPS oMerit: Provides high precision geo-location data of dynamic objects. (Priority of thiswork) oDemerit: High cost and energy consumption. 4
- 7. Long-Range Wireless Interface • LoRa for long-range geo-location tracking system oAttractive long-range communication oTolerable data rate 6 Long-Range Wireless Interface Aspect Coverage Range (km) Data Rate (Kbps) Frequency Band Amber Wireless Up to 20 Up to 500 434MHz, 868MHz, 2.4GHz Ingenu Up to 15 0.01 - 8 2.4GHz LoRa 21+ 0.3-50 Spread (434MHz, 868MHz, 915MHz) NWave Up to 30 0.1 Sub-GHz Platanus Several hundred meters 500 Sub-GHz Sigfox 50 0.1 868 MHz
- 8. Proposed System Design • Adopt star topology and single-hop communication oSimpler topology to minimize energy consumption of sensor node oLong-range capability of LoRa eliminates the need for multi-hop communication 7 Long distance wireless data transmission Aggregation Layer Acquisition Layer Sensor Nodes Dock
- 10. Geo-location Data Service • Reconfigured GPS module (GMS7-CR6) oIn addition to latitude and longitude data, another useful data are retrieved from GPS module through programmable reconfiguration (NMEA sentence: RMC) 9 Data Unit Date Stamp UT Date Time Stamp UTC GPS Position (Latitude, Longitude) Decimal Degrees Speed Knots Course Degrees
- 11. Generic Geo-location Data Structure • Temporal geo-location data received by Dock from multiple homogenoussensor nodes 10 Sensor Node ID Date Stamp Time Stamp GPS Position Speed Course ID1 DS1 TS1 GP1 S1 C1 TS2 GP2 S2 C2 . . . . . . . . . . . . TSl1 GPm1 Sn1 Cn1 DS2 TSl1+1 ~ TSl2 GPm1+1 ~ GPm2 Sn1+1 ~ Sn2 Cn1+1 ~ Cn2 . . . . . . . . . . . . . . . DSk ~ TSlk ~ GPmk ~ Snk ~ Cnk ID2 ~ DSk2 ~ TSlk2 ~ GPmk2 ~ Snk2 ~ Cnk2 . . . . . . . . . . . . . . . . . . IDN ~ DSkN ~ TSlkN ~ GPmkN ~ SnkN ~ CnkN
- 12. WSN Prototype System Deployment • Building blocks of Sensor Nodes oMCU: Arduino UNO oWireless: Dragino LoRa oPower: 9V Lithium Battery oSensor: GPS (GMS7-CR6) • Building blocks of Dock oMCU: Intel Galileo Gen2 oWireless: Dragino LoRa oPower: External power supply 11
- 16. Conclusion • The development of WSN for geo-location tracking of mobile objects is explored oFor geo-location tracking of mobile objects, GPS module is used and reconfigured for additional useful data oTo achieve long distance sensing capability, LoRa wirelesstechnology isadopted oThe RSSI of multiple sensor nodes is tolerable to LoRa dynamic range • The combination of GPS and LoRa has a high potential for long-range geo-location tracking system of multiple mobile objects 15