Information transmission method in wireless individual domain network medical scene based on frequency spectrum perception technology

Abstract

The invention relates to information transmission method for radio body area network medical scene based on spectrum sensing technology of radio communication technology field. In the invention, each node of radio body area network roughly detects interested spectrum range segment to alarm and mark latent spectrum cavity, and then finely detects marked and alarmed latent spectrum cavity, calculates signal-noise ratio of each latent spectrum cavity and further confirms usability of the spectrum cavity. The spectrum cavity performance parameter which each node detects and the node position composition information are transmitted among all nodes of body channel in body area network. Each node compares transmission performance of every spectrum cavity in interested spectrum range and finds spectrum cavity of most excellent transmission performance and detects the node position of the cavity. The invention fully combines characteristic of radio body area network mixed channel, exert superiority of cooperative spectrum detection, possesses good transmission property, saves spectrum register fee.

Description

technical field [0001] The present invention relates to a method in the technical field of wireless communication, in particular to an information transmission method in a wireless body area network medical scene based on spectrum sensing technology. Background technique [0002] In response to the contradiction between the increasingly scarce available spectrum resources and the increasing demand for spectrum resources by wireless technologies, cognitive radio technology (Cognitive Radio wireless transmission), which tries to find available spectrum holes in the allocated spectrum (Licensed spectrum), has begun to be widely used. application. Frequency bands that have been allocated but have no data transmission in time or space are called spectrum holes. The widespread existence of spectrum holes provides the possibility for the development of cognitive radio technology. Cognitive wireless is to find out the available spectrum hole in the licensed spectrum of the primary...

AI Technical Summary

Problems solved by technology

Although this article combines the advantages of short energy detection method and high accuracy of cyclic feature detection, the method given in this article needs to constantly adjust the number of energy detection times, and the complexity of implementation is relatively high.

At the same time, for wireless channels where shadow fading exists widely, how to use cooperative spectrum detection in this method to effectively combat shadow fading is not considered

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