基于超宽带的无线传感器网络定位与数据通信技术-Univ.Emden-Leer-MOIN

Abstract—In this paper, a novel network protocol (MOIN - Mobile Open Infrastructure Network Protocol) for non synchronized UWB based wireless sensor networks is presented. Applications of classical protocols for such networks, where anchor nodes are not synchronized for ranging and communication purposes, typically are not effective for simultaneous ranging and communication tasks. The proposed MOIN protocol overcomes these shortcomings by using an optimized scheduling scheme for rangings. Dynamic domain selection and adaptive slot assignment depending on the number of network participants at runtime are key features to reduce the delay between each ranging procedure which minimizes motion artefacts. A sequential predefined ranging order can be ensured to minimize the position error. The channel access is realized by a centralized hybrid MAC layer which uses TDMA and CDMA. In addition, the MOIN protocol supports multiple sensor domains to achieve a higher network range. Another advantage of the adaptive slot assignment is the minimization of time slots in each superframe. This leads to a shorter superframe duration and significantly increases network throughput and update frequency rates.

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