FIELD: radio engineering, communication.
SUBSTANCE: system comprises a plurality of network nodes intercommunicating via short-range wireless communication, the MBAN system including a spectrum control sub-module which selects an operating channel or frequency for the short-range wireless communication based at least in a part on an electronic key specifying a usable spectrum for the short-range wireless communication; wherein the spectrum control sub-module selects an operating channel or frequency from the spectrum comprising a combination of a default spectrum and a restricted spectrum authorised for the use by the MBAN system by the electronic key; the electronic key includes an expiration time and the spectrum control sub-module selects an operating channel or frequency from the spectrum comprising a combination of a default spectrum and a restricted spectrum authorised for the use by the MBAN system by the electronic key, under the condition of the electronic key not having expired based on the expiration time, and only the default spectrum under the condition of the electronic key having expired based on the expiration time.
EFFECT: high reliability of MBAN wireless links.
19 cl, 1 dwg
