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Frequency spectrum sensing method and device of cognitive radio system

A cognitive radio and spectrum sensing technology, applied in wireless communication, electrical components, separation devices of transmission paths, etc., can solve problems such as system throughput requirements and a large number of silent periods, and achieve the goal of improving throughput and reducing the number of silent periods. Effect

Active Publication Date: 2014-01-15
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] Embodiments of the present invention provide a spectrum sensing method and device in a cognitive radio system, which solves the problem that the spectrum sensing scheme in the existing technical solution requires a large number of silent periods, and silent processing will increase the throughput of the system.

Method used

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  • Frequency spectrum sensing method and device of cognitive radio system
  • Frequency spectrum sensing method and device of cognitive radio system
  • Frequency spectrum sensing method and device of cognitive radio system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] Embodiment 1. Static silent period configuration pattern and spectrum sensing strategy.

[0149] In this embodiment, a specific working scenario is: a TD-LTE system with a cognitive radio function, sensing TV idle frequency bands.

[0150] Since the bandwidth of each TV channel is 8MHz, it is assumed that each spectrum sensing can only perceive a bandwidth of 8MHz, and it is assumed that the entire bandwidth to be sensed is 4 TV channel widths in total. The four TV channels are respectively considered as sub-band-1, sub-band-2, sub-band-3, and sub-band-4.

[0151] Further, it is assumed that the target TD-LTE system operates in the above sub-band-1 and sub-band-2 with a bandwidth of 10 MHz. There is a nearby TD-LTE system with a bandwidth of 10MHz currently operating in sub-band-3 and sub-band-4.

[0152] In such an application scenario, the static silent period configuration pattern of the TD-LTE network is preset, the static silent period period is P, and the specif...

Embodiment 2

[0166] Embodiment 2, a dynamic silent period configuration pattern and a spectrum sensing strategy.

[0167] In this embodiment, the specific working scene is the same as the working scene in the first embodiment, and will not be repeated here.

[0168] In such an application scenario, the dynamic silent period configuration pattern of the TD-LTE network is preset, the dynamic silent period period is P, and the specific content of the configuration pattern is:

[0169] TD-LTE operating in sub-band-1 is to be silent in the i-th subframe (or i, i+1, i+2.. subframe) of the system frame with Mod(SFN, P)=s1.

[0170] TD-LTE operating in sub-band-2 is to be silent in the i-th subframe (or i, i+1, i+2.. subframe) of the system frame with Mod(SFN, P)=s2.

[0171] TD-LTE operating in sub-band-3 is to be silent in the i-th subframe (or i, i+1, i+2.. subframe) of the system frame with Mod(SFN, P)=s3.

[0172] TD-LTE operating in sub-band-4 is to be silent in the i-th subframe (or i-th,...

Embodiment 3

[0176] Embodiment 3. Mixed silent period configuration pattern and spectrum sensing strategy

[0177] In this embodiment, the specific working scene is the same as the working scene in the first embodiment, and will not be repeated here.

[0178] In such an application scenario, the dynamic silent period configuration pattern of the TD-LTE network is preset, the dynamic silent period period is P1, and the specific content of the configuration pattern is:

[0179] TD-LTE operating in sub-band-1 is to be silent in the i-th subframe (or i-th, i+1, i+2..subframes) of the system frame with Mod(SFN, P1)=s1.

[0180] TD-LTE operating in sub-band-2 is to be silent in the i-th subframe (or i-th, i+1, i+2..subframes) of the system frame with Mod(SFN, P1)=s2.

[0181] TD-LTE operating in sub-band-3 is to be silent in the i-th subframe (or i-th, i+1, i+2..subframes) of the system frame with Mod(SFN, P1)=s3.

[0182] TD-LTE operating in sub-band-4 is to be silent in the i-th subframe (or...

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Abstract

The embodiment of the invention discloses a frequency spectrum sensing method and device of a cognitive radio system. According to the technical scheme, a cognitive radio cell obtains a scheme for dividing a frequency band resource into a plurality of sub frequency bands and a corresponding silent period time frequency pattern, when the cognitive radio cell is silenced on the sub frequency band where the cognitive radio cell works according to the silent period time positions of all sub frequency bands defined by the silent period time frequency pattern, plectrum sensing of corresponding sub frequency bands is achieved, and therefore under a multi-cell network environment, a plurality of cells use a uniform silent period time frequency pattern and a frequency spectrum sensing strategy, frequency spectrum sensing can be effectively prevented from being interfered by the cell or other adjacent cells under the condition of multiple cells, moreover, through dividing of the sub frequency bands and silencing and frequency spectrum sensing on the sub frequency bands, the number of silent periods needed by the frequency spectrum sensing can be effectively lowered, and handling capacity of the cognitive radio frequency spectrum sensing system is improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a spectrum sensing 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 some w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14
CPCH04W16/14H04L5/0007H04L5/14
Inventor 蒋成钢李媛媛白文岭杨宇
Owner DATANG MOBILE COMM EQUIP CO LTD
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