Spectrum sensing method and device in cognitive radio system

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

Active Publication Date: 2016-11-23
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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  • Spectrum sensing method and device in cognitive radio system
  • Spectrum sensing method and device in cognitive radio system
  • Spectrum sensing method and device in cognitive radio system

Examples

Experimental program
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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 ith 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 ith 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 ith 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 ith subframe (or i, i+1, i...

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 ith subframe (or i, i+1, i+2.. subframe) of the system frame with Mod(SFN, P1)=s1.

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

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

[0182] TD-LTE operating in sub-band-4 is to be silent in the ith subframe (or i, i+1, i+2....

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Abstract

Embodiments of the present invention disclose a spectrum sensing method and device in a cognitive radio system. By applying the technical solutions of the embodiments of the present invention, a cognitive radio cell acquires a solution for dividing frequency band resources into multiple sub-bands and a corresponding silent period Time-frequency pattern, when the cognitive radio cell is muted on the sub-frequency band it works according to the silent period time position of each sub-frequency band defined in the silent period time-frequency pattern, the corresponding sub-frequency band is implemented. Therefore, in the multi-cell networking environment, the method can effectively avoid the interference of the spectrum sensing by the local cell and other neighboring cells in the multi-cell situation by using a unified silent period time-frequency pattern and spectrum sensing strategy in multiple cells. In addition, by dividing the sub-bands and performing muting and spectrum sensing on the sub-bands respectively, the number of silent periods required for spectrum sensing can be effectively reduced, and the throughput of the cognitive radio spectrum sensing system can be 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 Patents(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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