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

Gaurav Konchady and Sriram Sanka Outline Wireless Sensor Networks Motes GNU Radio as Base-station CC1000 RF Transceiver IEEE 802.15.4 Standard Block Diagram Results April 1, 2017 Gaurav Konchady and Sriram Sanka

Wireless Sensor Networks Network of Spatially distributed sensor devices Two tiered architecture Sensor and Base-station nodes April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka 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. April 1, 2017 Gaurav Konchady and Sriram Sanka

GNU Radio as Base-station Interoperability with heterogeneous motes Wideband nature of USRP enables multichannel communication Flexibility in selection of modulation scheme April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka CC1000 RF Transceiver Frequency range: 300 – 1000 MHz FSK modulation with 76.8 kBaud max Manchester encoding Integrated bit-synchronizer April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka TinyOS CC1000 Frame Format TinyOS and SOS CC1000 frame formats have different fields Requires changes in CC1000 modulator and demodulator blocks in GNU Radio April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka IEEE 802.15.4 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 2483.5 MHz frequency range DSSS employing O-QPSK modulation April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka TinyOS 802.15.4 T-frame T-frame differs from the original IEEE 802.15.4 frame format Requires modifications to 802.15.4 modulator and demodulator blocks in GNU Radio April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka Project Setup MICA2 mote sends data to USRP (FLEX400) USRP extracts payload from CC1000 frame Payload inserted in an 802.15.4 T-frame T-frame transmitted by USRP (RFX2400) Packets received by TelosB mote April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka Block Diagram FLEX400 CC1000 Demodulator 802.15.4 Modulator Packet Queue Python Callback Python send_pkt() RFX2400 USRP April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka Goals Accomplished Detecting 802.15.4 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 April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka Results MICA2 output USRP output TelosB base-station output April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka References IEEE 802.15.4-2006 standard, http://standards.ieee.org/getieee802/802.15.html Thomas Schmid, GNU Radio 802.15. 4 En-and Decoding, http://nesl.ee.ucla.edu/fw/thomas/thomas_project_report.pdf TEP 125 – TinyOS 802.15.4 Frames, http://tinyos.cvs.sourceforge.net/*checkout*/tinyos/tinyos-2.x/doc/html/tep125.html CC1000 datasheet, http://www.cse.ohio-state.edu/siefast/nest/nest_webpage/datasheet/Chipcon%20-%20CC1000%20Data%20Sheet%20v2.1.pdf April 1, 2017 Gaurav Konchady and Sriram Sanka

Gaurav Konchady and Sriram Sanka Thank you Questions? April 1, 2017 Gaurav Konchady and Sriram Sanka