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Frequency point selection method and device of cognitive radio system

A cognitive radio and frequency point technology, applied in the field of communication, can solve problems such as system communication quality degradation, adjacent frequency leakage, and dynamic spectrum allocation cannot be achieved, and achieve the effect of increasing convenience, improving accuracy, and reducing equipment investment costs

Active Publication Date: 2014-01-15
DATANG MOBILE COMM EQUIP CO LTD
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Problems solved by technology

[0028] Embodiments of the present invention provide a frequency point selection method and equipment in a cognitive radio system, which solves the problem that the frequency point selection scheme in the existing technical solution cannot be achieved due to factors such as signal strength of the authorized system, adjacent frequency leakage, and dynamic spectrum allocation. Better detection accuracy of interference, and issues that can degrade system communication quality

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  • Frequency point selection method and device of cognitive radio system
  • Frequency point selection method and device of cognitive radio system

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Embodiment 1

[0137] In this embodiment, it is assumed that the working scenario is that TD-LTE with the cognitive radio function uses a TV idle frequency band, wherein the TD-LTE bandwidth is 20 MHz, and the TV bandwidth is 8 MHz.

[0138] Further, it is assumed that spectrum sensing performs interference measurement of idle spectrum with a frequency bandwidth of 8 MHz (that is, the aforementioned interference measurement bandwidth), and the measurement is completed by the base station.

[0139] For the convenience of description, in this embodiment, the base station is divided into functional modules. According to the prior art, the TD-LTE base station has a spectrum sensing module and a dynamic spectrum management module. In this embodiment, an interference measurement module and a spectrum quality evaluation module are further added module.

[0140] It should be noted that, for the convenience of description, such functional module division instructions can be set according to actual ne...

Embodiment 2

[0168] In this embodiment, it is assumed that the uplink and downlink spectrum requirements of the FDD CR system are each 10 MHz.

[0169] It is further assumed that the CR base station of FDD can measure a frequency band with a bandwidth of 10 MHz when performing an interference measurement, that is, the aforementioned interference measurement capability of the base station itself, thus, it can be determined that the interference measurement bandwidth of the base station is also 10 MHz.

[0170] Such as Figure 7 As shown, it is a schematic diagram of a specific spectrum environment proposed by Embodiment 2 of the present invention. In such a spectrum environment, the frequency bandwidth available for the FDD CR system to work is 100 MHz, of which 70 MHz is in an idle state.

[0171] According to such a spectrum environment, the specific processing procedure is described as follows:

[0172] (1) The FDD CR base station discovers 70MHz idle spectrum resources through spectrum...

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Abstract

The embodiment of the invention discloses a frequency point selection method and device of a cognitive radio system. According to the technical scheme, a base station obtains interference measuring information of an idle frequency band capable of enabling the cognitive radio system to work at present, the frequency spectrum quality of the idle frequency band is evaluated according to the interference measuring information, according to an evaluation result, an idle frequency point which is most suitable for the cognitive radio system to work at present is selected as the work frequency point of the cognitive radio system, so that communication quality when the cognitive radio system uses idle frequency spectrum resources for communication is effectively improved, and meanwhile, according to the method, only interference measurement, frequency spectrum quality evaluation and frequency spectrum selection process are added in the cognitive radio system, an existing system is modified slightly, convenience for special implementation is increased, and device input cost is lowered.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a frequency point selection method and equipment in a cognitive radio system. Background technique [0002] With the rapid development of the mobile communication industry, the contradiction between the growing demand for broadband wireless communication and the limited spectrum resources is becoming more and more obvious. Although OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing, Multiplexing), MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) and other technologies to improve spectrum utilization, but these cannot fundamentally solve the problem of limited spectrum resources. [0003] With the rapid development of mobile services in the future, telecom operators will face a more severe shortage of spectrum resources. On the other hand, the spectrum usage of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W24/08H04W48/16
Inventor 蒋成钢唐业明李媛媛白文岭杨宇
Owner DATANG MOBILE COMM EQUIP CO LTD
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