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Communication between Wireless Sensor Devices and GNU Radio Gaurav Konchady Sriram Sanka.

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Presentation on theme: "Communication between Wireless Sensor Devices and GNU Radio Gaurav Konchady Sriram Sanka."— Presentation transcript:

1 Communication between Wireless Sensor Devices and GNU Radio Gaurav Konchady Sriram Sanka

2 Outline Wireless Sensor Networks Motes GNU Radio as Base-station CC1000 RF Transceiver IEEE Standard Block Diagram Results 2Gaurav Konchady and Sriram SankaJune 6, 2014

3 Wireless Sensor Networks Network of Spatially distributed sensor devices Two tiered architecture Sensor and Base-station nodes 3Gaurav Konchady and Sriram SankaJune 6, 2014

4 Types of Motes TelosB, MICA2 and MICAz to be used in project Motes programmed in TinyOS software platform Other OSs include SOS, Contiki, Mantis, etc. 4Gaurav Konchady and Sriram SankaJune 6, 2014

5 GNU Radio as Base-station Interoperability with heterogeneous motes Wideband nature of USRP enables multichannel communication Flexibility in selection of modulation scheme 5Gaurav Konchady and Sriram SankaJune 6, 2014

6 CC1000 RF Transceiver Frequency range: 300 – 1000 MHz FSK modulation with 76.8 kBaud max Manchester encoding Integrated bit-synchronizer June 6, 2014Gaurav Konchady and Sriram Sanka6

7 TinyOS CC1000 Frame Format June 6, 2014Gaurav Konchady and Sriram Sanka7 TinyOS and SOS CC1000 frame formats have different fields Requires changes in CC1000 modulator and demodulator blocks in GNU Radio

8 IEEE Standard MAC and Physical layer protocol for short- distance, low-power, low-data-rate wireless communication 128 byte maximum MAC frame size 2400 MHz to MHz frequency range DSSS employing O-QPSK modulation 8Gaurav Konchady and Sriram SankaJune 6, 2014

9 TinyOS T-frame T-frame differs from the original IEEE frame format Requires modifications to modulator and demodulator blocks in GNU Radio 9Gaurav Konchady and Sriram SankaJune 6, 2014

10 Project Setup MICA2 mote sends data to USRP (FLEX400) USRP extracts payload from CC1000 frame Payload inserted in an T-frame T-frame transmitted by USRP (RFX2400) Packets received by TelosB mote June 6, 2014Gaurav Konchady and Sriram Sanka10

11 Block Diagram 11Gaurav Konchady and Sriram SankaJune 6, 2014 FLEX400 CC1000 Demodulator Modulator Packet Queue Python Callback Python send_pkt() RFX2400 USRP

12 Goals Accomplished Detecting frame on USRP using RFX2400 daughterboard MICA2 to USRP communication TelosB to USRP communication MICA2 to TelosB communication via USRP Future work TelosB to MICA2 communication via USRP 12Gaurav Konchady and Sriram SankaJune 6, 2014

13 Results MICA2 output USRP output TelosB base-station output June 6, 2014Gaurav Konchady and Sriram Sanka13

14 References 1.IEEE standard, 2.Thomas Schmid, GNU Radio En-and Decoding, pdf pdf 3.TEP 125 – TinyOS Frames, 2.x/doc/html/tep125.html 2.x/doc/html/tep125.html 4.CC1000 datasheet, state.edu/siefast/nest/nest_webpage/datasheet/Chipcon%2 0-%20CC1000%20Data%20Sheet%20v2.1.pdfhttp://www.cse.ohio- state.edu/siefast/nest/nest_webpage/datasheet/Chipcon%2 0-%20CC1000%20Data%20Sheet%20v2.1.pdf June 6, 2014Gaurav Konchady and Sriram Sanka14

15 Thank you Questions? 15Gaurav Konchady and Sriram SankaJune 6, 2014


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