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Discrete Spectrum Aggregation Method Based on Maximum Space Priority

A technology of discrete spectrum and aggregation method, which is applied in electrical components, wireless communication, network planning, etc., can solve the problems of the number of guard intervals and the influence of spectrum utilization efficiency, etc., and achieve the effect of reducing guard interval overhead and improving utilization efficiency

Inactive Publication Date: 2016-01-20
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Users 1, 2, and 3 can use different frequency bands for OFDM respectively. Therefore, different aggregation methods have the problem of the number of guard intervals, which directly affects the efficiency of spectrum use.

Method used

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  • Discrete Spectrum Aggregation Method Based on Maximum Space Priority
  • Discrete Spectrum Aggregation Method Based on Maximum Space Priority
  • Discrete Spectrum Aggregation Method Based on Maximum Space Priority

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] like figure 2 As shown, this embodiment records a discrete spectrum aggregation method based on maximum space priority, which is characterized in that it includes the following steps:

[0048] S1: Obtain the spectrum availability status through the perception of the working spectrum;

[0049] The spectrum availability status includes but is not limited to whether the frequency band is idle, idle probability, average idle duration, signal-to-noise ratio from the user to the target base station or gateway, and the transmission rate required by the user;

[0050] S2: Identify the continuous usable frequency bands on the spectrum, and obtain the usable frequency band with the longest frequency band length;

[0051] S3: Calculate the number of frequency bands required by the user to send data, and obtain the user with the largest number of required frequency bands;

[0052] S4: If the number of frequency bands of all available frequency bands cannot meet the service needs...

Embodiment 2

[0060] like image 3 As shown, during the initialization phase, it is assumed that the working frequency spectrum is divided into N continuous frequency bands, which are respectively used by M users. The discrete spectrum aggregation method recorded in this embodiment specifically includes the following steps:

[0061] S101: Obtain the use status of N continuous frequency bands on the frequency spectrum by sensing the working frequency spectrum;

[0062] S102: Establish a frequency band usage list {AV i} identifies whether the frequency band can be used, where i∈[1, N] is the frequency band identification number;

[0063] S103: Continuously usable frequency band FS on the spectrum k (k≥1) to mark, to get the longest usable frequency band Max(FS k );

[0064] S104: Calculate the number of frequency bands required by the user to send data in the case of continuous frequency band Demand j , where j∈[1, M] is the user number, and the user with the largest number of required f...

Embodiment 3

[0072] like Figure 4 As shown, when there is a new service that needs to use spectrum during the system operation phase, the discrete spectrum aggregation method recorded in this embodiment specifically includes the following steps:

[0073] S201: Obtain the available state of the spectrum by sensing the working spectrum;

[0074] S202: Continuously usable frequency band FS on the spectrum k Identify and obtain the usable frequency band Max(FS k );

[0075] S203: Calculate the number of frequency bands required by the user to send data Demand j ;

[0076] S204: The user uses the available frequency band Max(FS k ):

[0077] If the frequency band with the longest available frequency band Max(FS k ) is greater than or equal to the number of frequency bands required by the user to send data Demand j , then identify that the corresponding frequency band has been used by the user, and recalculate the length of the frequency band;

[0078] If the frequency band with the lo...

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Abstract

The invention discloses a discrete spectrum aggregating method based on a preferential maximum space. The discrete spectrum aggregating method comprises the following steps: 1) By sensing a working spectrum, usable spectrum status of the spectrum is obtained; 2) sequent usable frequency bands on the spectrum are marked, and a usable frequency band with the longest length is obtained; 3) the number of the frequency bands used in the data sent by a user is calculated, and a user requiring the largest number of the frequency bands is acquired; 4) the user requiring the largest number of the frequency bands preferentially uses the usable frequency band with the longest length; 5) and the user requiring the largest number of the frequency bands and the usable frequency band with the longest length are upgraded, and then the step 4) is circularly carried out till the number of the frequency bands is zero or all the usable frequency bands can not meet the service demand of a user requiring the littlest number of the frequency bands. According to the invention, the guard interval overhead of the frequency bands is reduced, so that the system spectrum utilization efficiency is improved.

Description

technical field [0001] The present invention relates to the field of cognitive radio technology, in particular to a discrete spectrum aggregation method based on maximum space priority. Background technique [0002] Wireless spectrum is an extremely precious resource. With the rapid development of wireless communication technology and the increase of people's demand for wireless services, the scarcity of spectrum resources is becoming more and more serious. However, studies have shown that the spectrum utilization rate of the current licensed spectrum is very low. Cognitive radio is a technology that detects spectrum and then dynamically allocates spectrum resources. Its goal is to realize the reuse and sharing of spectrum resources from multiple dimensions such as time, space and frequency, thereby greatly improving spectrum utilization efficiency. [0003] In actual communication conditions, the available spectrum is often discontinuous, that is, the discrete spectrum cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/02H04W16/14
Inventor 张勇宋梅
Owner BEIJING UNIV OF POSTS & TELECOMM