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Channel availability detection method and system, and spectrum management method

A channel monitoring and channel technology, which is applied in the detection of channel availability, spectrum management methods and system fields, can solve the problems of channel instability, user switching frequency, and slow update speed of channel priority table, etc., to achieve reasonable channel allocation and high performance Stabilize and reduce the effect of channel switching

Inactive Publication Date: 2013-01-02
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, among the many available channels, it is definitely not advisable to randomly select channels to evaluate the quality of a channel, or to quantify the satisfaction of a channel to wireless communication users.
In cognitive radio spectrum management, the original method randomly selects channels among known available channels and allocates them to users, which is likely to allocate channels suffering from intermittent interference to users, and such channels are very unstable , which may cause users to continuously switch frequency
The subsequent "bubble" method sorts the quality of the channel. The specific method is that the user suffers from interference on a certain channel and performs a frequency switch, and the priority is reduced by one level. The disadvantage of this method is that the channel priority table is updated. The speed is very slow and cannot reflect the status of the channel in time

Method used

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  • Channel availability detection method and system, and spectrum management method
  • Channel availability detection method and system, and spectrum management method
  • Channel availability detection method and system, and spectrum management method

Examples

Experimental program
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application example 1

[0074] In this example, the central control node collects interference signals and calculates channel availability, such as image 3 shown, including:

[0075] Step 1: The central control node sends a channel monitoring command to the base station of the secondary system. The channel monitoring command carries but is not limited to the following information: channel frequency, interference threshold, area range, time range, etc.;

[0076] Step 2: After receiving the channel monitoring command, the base station of the secondary system issues a control command to the cognitive users within the above-mentioned specified area, allowing them to monitor the interference situation of the channel. The control command includes: information collection frequency, collection duration, collection times and channel frequency, etc.;

[0077] Step 3: The cognitive user monitors the designated channel according to the control command, collects the interference result within a period of time, ...

application example 2

[0083] In this example, the value of the interference parameter is collected by the base station of the secondary system, and the channel availability is calculated, such as Figure 4 shown, including the following steps:

[0084] Step 1: The central control node issues a channel monitoring command to the base station of the secondary system to allow it to detect channel availability and the like. The monitoring command carries: channel frequency, interference threshold, etc.; of course, the interference threshold may not be carried in the monitoring command, but is set by the base station of the secondary system by itself;

[0085] Step 2: After receiving the channel monitoring command, the base station of the secondary system issues a control command to the cognitive user to monitor the channel interference. The control command includes: information collection frequency, collection duration, collection times, channel frequency, area range and time range, etc.

[0086] Step...

application example 3

[0094] In this example, the central control node collects interference signals and calculates channel availability, such as image 3 shown, including:

[0095] Steps 1 to 3 are the same as Steps 1 to 3 in Application Example 1, and will not be repeated here;

[0096] Step 4: After receiving the interference result, the base station of the secondary system reports to the central control node, and the central control node calculates the availability of the channel according to the interference result using an exponential model, and prioritizes the channel according to the value of the channel availability Sort. Among them, the exponential model is the following formula:

[0097] A=α F ×β R

[0098] Among them, A represents the channel availability; F represents the interference frequency; R represents the interference time ratio; α represents the interference frequency control factor, and β represents the interference time ratio control factor, and the values ​​of α and β c...

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Abstract

The invention discloses a channel availability detection method and system, and a spectrum management method, which are applied in a cognitive radio system. The detection method comprises the following steps that: a network element in a secondary system issues a channel monitoring command and indicates cognitive users to monitor the primary user signal of an appointed channel; and for each channel, the network element calculates the channel availability of the channel by adopting an exponential type model according to the values of the interference parameters of the channel reported to each cognitive user within a period of time. The spectrum management method comprises the following steps that: the network element carries out channel priority ordering according to the calculated values of the channel availability and distributes an available channel with the highest channel priority for the cognitive users issuing a channel request after the calculation of the channel availability is completed according to the method. After the detection method with channel availability and the spectrum management method and system are adopted, the channel distribution of the cognitive users on a network side is more reasonable, channel switch is reduced, and the channel availability detection method and system and the spectrum management method are beneficial to the performance stability of the network.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method for detecting channel availability, a spectrum management method and a system. Background technique [0002] Cognitive radio is a technology in which wireless devices can identify the spectrum environment and improve spectrum efficiency by selecting appropriate bandwidth and communication methods. Cognitive radio technology enables more efficient use of frequency resources. In cognitive radio systems, different channel allocation algorithms deal with priorities in managing the frequencies used in different ways. [0003] When multiple wireless communication systems use cognitive radio technology in a certain area at the same time, the spectrum usage priority of each system has been preset in the system, and each system shares these spectrum resources according to the frequency usage priority. In cognitive radio systems, many channel allocation algorithms manage sp...

Claims

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Application Information

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IPC IPC(8): H04B17/00H04W72/04H04B17/382
Inventor 任龙涛刘勤刘星李岩张力苗婷周栋
Owner ZTE CORP
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