Method for building frequency spectrum pool databases based on shared base stations
A technology for sharing base stations and databases, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of increasing the complexity and cost of equipment, being foolproof, and increasing the cost.
Inactive Publication Date: 2014-02-19
SHANGHAI NORMAL UNIVERSITY
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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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[0016] Below in conjunction with accompanying drawing and embodiment the present invention will be further described
[0017] See also a kind of shown in accompanying drawing 1, this method comprises the following steps:
[0018] A method for establishing a spectrum pool database based on a shared base station, characterized in that the spectrum pool database is established in a shared base station of a cognitive user system and a primary user system, and the shared base station has cognitive user access control and spectrum allocation and a primary Coordinating functions of users and cognitive users.
[0019] The primary user uses orthogonal frequency division multiplexing (OFDM) modulated orthogonal sub-carriers as objects, uses orthogonal sub-carriers as identifiers for multiple access differentiation, and uses orthogonal sub-carriers as basic elements of a spectrum pool database.
[0020] The method for establishing a spectrum pool database based on a shared base station ...
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The invention provides a method for building frequency spectrum pool databases based on shared base stations, particularly provides a method which is applied to cellular networks of the shared base stations of cognitive user systems and master user systems and used for replacing a cognitive radio frequency spectrum sensing technology, and relates to the technical field of cognitive radio frequency spectrum sensing. The method includes the steps that orthogonal sub-carriers modulated through OFDM are used as objects, one frequency spectrum pool database is built in each shared base station, in which the cognitive user system and the master user system commonly exist, of the cellular network. The shared base stations have the functions of cognitive user access control, frequency spectrum allocation and coordination of master users and cognitive users. Due to the fact that one master user system and one cognitive user system share the same base station, the cognitive user systems acquire master user idle frequency spectrum information and the master user systems acquire master user idle frequency spectrums at the same time, and the cognitive user systems and the master user systems have the same capacity for acquiring the master user idle frequency spectrums. For an LTE system in future, it is made possible that resources of the LTE system are utilized by the cognitive user systems through the method.
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...
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Login to View More IPC IPC(8): H04W16/14H04W84/18G06F17/30
Inventor 凌洪涛李莉张慧杰夏林
Owner SHANGHAI NORMAL UNIVERSITY