Impulse Ultrawideband ad-hoc tracking and communication network

Abstract

We propose a new dispersing protocol for mobile radios equipped with Impulse-Ultra Wideband (I-UWB) communication tools. Our network supports communication and ranging between mobile nodes localized at a central base station. The mobile radios are autonomous and make independent decisions based on the information they receive from other radios. Their decision for the direction they move should support their connectivity with other radios, minimize position dilution of precision (PDOP), and increase the covered area. To localize a radio, it needs to be seen by three other radios to have a unique solution for the location of that radio. The proposed protocol has been designed in a way that radios are able to explore and map an unknown floor space. These radios use I-UWB to communicate with each other. The pulsed-transmission nature of I-UWB has many advantages over conventional continuous-wave communication including non-interference, multi-path immunity, and precision through-wall ranging capability. We utilized the non-interfering advantage for re-assessment of pure Aloha scheduling. Through modeling and experimentation we found Aloha is compelling for real-time I-UWB communication and positioning in a mesh of mobile nodes with continually changing network dynamics. The throughput of Aloha for the applied system has been compared with a narrowband system.

Performance evaluation of Impulse Radio Ultra Wide band Wireless Sensor Networks

“…As an alternative MAC-PHY, layer for 802. 15.4a based WSN, several IR-UWB MAC-PHY models have been proposed [6][7][8][9][10][11]. These models can be divided into two categories: the first one insists on the PHY layer characterization [6][7][8].…”