Cognitive radio cooperative spectrum perception experiment platform and cooperative perception method

Abstract

The invention discloses a cognitive radio cooperative spectrum perception experiment platform which comprises an energy detection node, a matching filter perception node, a central node, a gateway interface and a gateway interface and a spectrum pool. The energy detection node, the matching filter perception node, the central node and a cognitive user form a wireless communication network for information interaction. The invention also discloses a cooperative perception method which is applied to the cognitive radio cooperative spectrum perception experiment platform, and the method comprises the following steps that: the energy detection node and the matching filter perception node respectively carry out spectrum perception and send the judgment information to the spectrum pool; the spectrum pool fuses the data of the judgment information, and a conflict channel set and a candidate channel set are obtained; and the central node distributes channels according to the queue of the candidate channel set and the cognitive user, and the gateway interface informs the cognitive user of the distribution result. According to the invention, the respective advantages of energy detection and matching filter detection are fully utilized, the performance of a cognitive network is improved, and simultaneously, the complicacy of data fusion is reduced.

Description

technical field [0001] The invention relates to a cognitive radio spectrum sensing technology, in particular to a cognitive radio cooperative spectrum sensing experimental platform and a cooperative sensing method. Background technique [0002] With the rapid increase of wireless communication services and equipment, radio spectrum resources are becoming increasingly scarce, and traditional spectrum management methods have been greatly challenged. Cognitive Radio (CR, Cognitive Radio) technology can realize the secondary use of idle spectrum, which opens up a new way to effectively solve the contradiction between the shortage of spectrum resources and the low utilization rate of spectrum in today's wireless networks. [0003] Cognitive radio is a new type of communication technology developed on the basis of software radio. It senses the spectrum of the surrounding electromagnetic environment, obtains the current spectrum "hole" of the authorized network, adjusts wireless t...

AI Technical Summary

Problems solved by technology

[0004] In the actual application scenario of CR, because there is no interactive information between cognitive users (that is, users using CR technology) and authorized users (CR transparency principle), coupled with unfavorable factors such as shadows, multipath, and uncertain noise in the wireless environment Due to the influence of the single spectrum sensing strategy of a single cognitive user, it is usually impossible to detect weak licensed signals with high reliability and strong real-time performance. The problem of hidden terminals has always been an urgent problem to be solved in spectrum sensing.

Frequent sensing will consume a lot of energy of cognitive users, thus greatly reducing the life span of cognitive users; at the same time, users participating in spectrum sensing will also lose a lot of transmission time

This does not take full advantage of the spectrum "hole" of the licensed network, thus restricting the throughput of the cognitive network

[0007] (2) Due to the movement of the cognitive user's location, the credibility of each judgment information changes, which causes the difficulty of data fusion in the control center

Several simple and practical data fusion methods commonly used in practical technology cannot guarantee the correctness of the final perception results

[0008] In addition, in the draft standard of 802.22, there is no specific implementation method for cooperative spectrum sensing

At present, most of the researches based on cooperative spectrum sensing focus on how to carry out data interaction and information processing, and most of the proposed methods are relatively complicated and difficult to apply in practice.

However, how to avoid the frequent interruption of transmission of cognitive users to spectrum sensing, thereby improving the throughput of cognitive networks, prolonging the life of cognitive users, and reducing the complexity of data fusion, etc., is rarely involved.

Images