Effects of node mobility on radio environment map accuracy and network connectivity


  1. Faint, S.M.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
Spectrum management using a radio environment map (REM) to dynamically allocate frequencies may facilitate the efficient exploitation of the spectrum in a heterogeneous environment. The generation of the REM may be supported by mobile sensors spread over the region to obtain power measurements. The movement of mobile sensors can be used to improve the accuracy of the REM, reducing the number of sensors and networking overhead required: As the sensors’ speed increases, or the observation window lengthens, the effective area covered by each sensor also increases, further improving the REM accuracy. However, if the target transmitters are not stationary, the data collected over time may become obsolete. It is shown through simulations that while a higher sensor speed may increase the amount of data collected, as these data become obsolete because of the mobility of the transmitters, a longer window length can negatively impact the quality of the REM generated. Additionally, it is also shown that sensor speed may affect the overall connectivity of the network.

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Report Number
DRDC-OTTAWA-TM-2011-188 — Technical Memorandum
Date of publication
01 Dec 2011
Number of Pages
Electronic Document(PDF)

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