Method and device for spectrum sharing in cognitive radio system
A cognitive radio and spectrum sharing technology, applied in the field of wireless communication, can solve problems such as insufficient utilization, primary user interference, and spectrum sensing errors, and achieve the effect of improving spectrum utilization and maximizing data transmission efficiency
Inactive Publication Date: 2015-04-15
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology
In the spectrum licensed network structure, secondary users can only access the spectrum resources licensed by the primary user, but this is not enough to fully improve the spectrum utilization rate, especially when the primary user owns a part of the "white spectrum", this utilization rate is insufficient more serious
However, if the slave users only use the spectrum resources of the master user in the way of opportunistic spectrum access, in practical applications, the slave users may experience spectrum sensing errors, which will cause huge interference from the slave users to the master users, greatly reducing the The data transmission efficiency of both parties is improved
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[0040] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0041] For simplicity, refer to figure 1 , taking the scenario of only one primary user (Primary User, PU) and one secondary user (Secondary User, SU) in the cognitive radio system as the system model. At the same time, it can be extended to multi-user scenarios in cognitive radio systems. Based on the above system model, the spectrum bandwidth owned by the PU is W. In order to improve the spectrum utilization, the PU allocates a part of the spectrum bandwidth B s Licensed to the SU, the master user and the slave user jointly adjust the service demand characterization value P, and at the same time, the slave user can share another part of the spectrum bandwidth B of the ...
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The invention discloses a method and a device for spectrum sharing in a cognitive radio system, and relates to the technical field of wireless communication. Through adjusting business requirement characterization values, to-be-permitted spectrum bandwidth of a main user and required spectrum bandwidth of a secondary user are balanced, so as to improve spectral efficiency in a cognitive radio system to the maximum extent, and meanwhile maximum transmission efficiency of main user and secondary user data is ensured.
Description
technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a spectrum sharing method and device in a cognitive radio system. Background technique [0002] With the vigorous development and wide application of wireless communication technology, people have higher and higher requirements for the transmission rate of wireless communication, and then more and more demand for wireless spectrum resources, resulting in increasingly tight wireless spectrum resources, and due to mobile terminal antenna Due to size and power limitations, the spectrum available for wireless access is limited, and the shortage of spectrum resources has become one of the important factors restricting the development of future wireless communication technologies. The U.S. Federal Communications Commission (FCC) conducted a lot of research on the utilization of wireless frequency bands in the United States. A report published in 2002 pointed out ...
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IPC IPC(8): H04W16/14H04B17/309
CPCH04W16/14
Inventor 王卫东余阳蔡渃姬艳丽张英海
Owner BEIJING UNIV OF POSTS & TELECOMM