In this paper, the authors show message exchange between Versatile Sensor Nodes (VSN), which runs the Contiki operating system and use the Texas Instruments CC1101 radio. They explain the port of the Contiki on VSN with the emphasis on the wireless communication. VSN is a modular sensor node platform featuring ...Download Now
The increased utilization of wireless technologies operating in the ISM frequency bands causes cross-interference and performance degradation. A preliminary step to achieve coexistence and spectrum sharing among the ISM band technologies, supporting the idea of cognitive radio networks, is to obtain knowledge of the wireless medium utilization by making use ...Download Now
This paper proposes a new design and a simulation model for the pico base station based on IEEE 802.16e standard and evaluates its performance in a muti-hop-relay and mesh networks. The proposed base station design allows multihop-relay communications and thus opens a possibility for the proposed base station to be ...Download Now
Radio network planning and dimensioning have significant impact on the overall system capacity of the cellular communication systems. Various commercial network planning and dimensioning tools with different radio signal propagation models implemented are available on the market. Their price and especially inflexibility led one to look for an open-source solution. ...Download Now
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