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Frequency-point selection method and device in cognitive radio system

A cognitive radio and frequency technology, applied in the field of communication, can solve the problem of inability to select and adjust the frequency, and achieve the effect of enhancing reliability and improving communication quality.

Inactive Publication Date: 2014-01-22
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] Embodiments of the present invention provide a frequency point selection method and equipment in a cognitive radio system, which solves the problem that the existing technical solutions cannot flexibly select and adjust frequency points according to the actual communication quality of the frequency points

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  • Frequency-point selection method and device in cognitive radio system
  • Frequency-point selection method and device in cognitive radio system
  • Frequency-point selection method and device in cognitive radio system

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Experimental program
Comparison scheme
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Embodiment 1

[0168] In this embodiment, it is assumed that the working scenario is that TD-LTE with a cognitive radio function uses a TV idle frequency band, wherein the bandwidth of TD-LTE is 20 MHz, and the bandwidth of TV is 8 MHz.

[0169] Further, it is assumed that spectrum sensing detects idle spectrum with a frequency bandwidth of 8 MHz.

[0170] The TD-LTE base station has a spectrum sensing module and a dynamic spectrum management module, and a spectrum quality statistics module is added.

[0171] (1) During initialization, the spectrum management module divides the entire usable frequency band into 8MHz sub-bands according to the TV frequency band characteristics, and numbers each channel.

[0172] For example, there are a total of 8 sub-channels from 694MHz to 758MHz.

[0173] (2) The spectrum management module creates spectrum quality indicators Q1~Q8 for each subchannel.

[0174] Initialize Q1=Q2=Q3=Q4=Q5=Q6=Q7=Q8=0.

[0175] (3) The spectrum sensing module on the TD-LTE b...

Embodiment 2

[0192] Assume that the multi-carrier CR system currently only activates one carrier, and the system wishes to establish a second carrier on an idle frequency point.

[0193] (1) The CR system obtains free frequency band resources through spectrum sensing.

[0194] (2) The CR system selects a suitable idle frequency band.

[0195] (3) The CR system establishes a second carrier on the idle frequency band selected in step S602, and schedules a small number of terminals to work on the second carrier.

[0196] (4) The CR system quantifies and counts the quality of the link on the second carrier, and obtains the link quality indicator S.

[0197] If the link quality S=2 on the second carrier, execute (5);

[0198] If the quality S of the link on the second carrier is <2, perform (6).

[0199] (5) Scheduling other terminals to work on the second carrier according to network load requirements.

[0200] (6) Schedule the terminal on the second carrier to the original carrier, and re...

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Abstract

The embodiment of the invention discloses a frequency-point selection method and device in a cognitive radio system. A technical scheme of the embodiment of the invention is applied so that a base station carries out wireless communication and at the same time, obtains quality indications of current communication links and selects a new work frequency point according to current idle spectrum resource information and corresponding quality indications when frequency point adjustment processing is triggered and continues to carry out wireless communication on the new work frequency point. Therefore, a spectrum dynamic use capability of the cognitive radio system is used to select spectrums flexibly according to the communication quality of a current work frequency point itself and particularly, when the communication quality of a current work frequency band cannot meet communication quality demands of the cognitive radio, the device is readjusted to other usable frequency points to work until a frequency point, communication quality demands of which are met, is found. Therefore, it is ensured that the work frequency point can meet communication quality demands of the system from beginning to end and thus communication quality of a network is improved and reliability of system communication is strengthened.

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 蒋成钢唐业明白文岭李媛媛杨宇
Owner CHINA ACAD OF TELECOMM TECH