Method for establishing spectrum pool database based on shared base station

Abstract

The invention discloses a method for establishing a spectrum pool database based on a shared base station, specifically referring to a method for replacing the cognitive radio spectrum sensing technology in a cellular network where a cognitive user system and a primary user system share a base station, and relates to cognitive radio spectrum The field of sensory technology. In the method, an OFDM modulated orthogonal subcarrier is used as an object, and a spectrum pool database is established in a shared base station of a cellular network where each cognitive user system and a primary user system coexist. The shared base station has functions of cognitive user access control and spectrum allocation, and coordination between primary users and cognitive users. Because the primary user system and the cognitive user system share the same base station, the cognitive user system learns the primary user idle spectrum information at the same time as the primary user system learns the primary user idle spectrum, and has the same ability to acquire the primary user idle spectrum. Like the future LTE system, using this method makes it possible for the cognitive user system to use the resources of the LTE system.

Description

technical field [0001] The present invention relates to the technical field of cognitive radio spectrum sensing, more specifically, a method for cognitive radio spectrum sensing technology applied to a cellular network in which a cognitive user system and a primary user system share a base station. Background technique [0002] With the growth of wireless communication services, available frequency bands are increasingly tight, and the problem of scarce spectrum resources is becoming more and more serious. How to improve spectrum utilization and effectively utilize different idle channels in different regions and different time periods has become a technical issue that people are very concerned about. The concept of Cognitive Radio (CR) was proposed by Dr. Joseph Mitola. Its leading idea is to improve spectrum utilization by quickly and accurately sensing the idle spectrum of the primary user and utilizing it. Therefore, spectrum sensing technology has been an important par...

AI Technical Summary

Problems solved by technology

In "Electronic Enthusiast" in September 2011, there was an overview of spectrum sensing technology, and the proposed database archive technology, because the database of this technology is built on the cognitive user system, it needs real-time detection and update of the main user's For location information, it is necessary to build a database network for this, resulting in an increase in cost

However, there is a certain contradiction in the solution of these two problems, or it can be solved by increasing the complexity and cost of the equipment. However, even this cannot guarantee that the detection of spectral holes is foolproof, and there is still a certain probability of missed detection.

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