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Multi-user hybrid spectrum sharing method and system

A spectrum sharing and hybrid technology, applied in the field of multi-user hybrid spectrum sharing, can solve the problems of low spectrum utilization, inability to make full use of frequency bands, low transmit power, etc., and achieve the effect of increasing spectrum utilization.

Active Publication Date: 2017-12-05
GUILIN UNIV OF ELECTRONIC TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the current research on spectrum sharing of cognitive radio, only the underlay and overlay methods are basically studied separately
In the underlay mode, because the cognitive users can only transmit with a small transmission power, they can only communicate at short distances; while in the overlay mode, because the cognitive users can only use the spectrum when the spectrum is empty, they cannot make full use of it. frequency band
It can be seen that it is difficult to ensure that the licensed frequency band can be used in real time by using the underlay mode and the overlay mode alone, and the spectrum utilization rate is low.

Method used

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  • Multi-user hybrid spectrum sharing method and system

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Embodiment Construction

[0040] A multi-user hybrid spectrum sharing method, such as figure 1 described, including the following steps:

[0041]Step 1. The cognitive user initiates spectrum sensing to sense whether the licensed frequency band is free.

[0042] Step 2. If the licensed frequency band is perceived to be idle in step 1, the cognitive user intends to access the licensed frequency band with the transmit power at the optimal outage probability in the opportunistic spectrum sharing mode.

[0043] Step 3. Calculate the receiving signal-to-noise ratio of the cognitive user to be accessed. If the received signal-to-noise ratio of the cognitive user is greater than or equal to the preset signal-to-noise ratio threshold, the cognitive user is controlled to continue to access the authorized frequency band. Otherwise, control the cognitive user to access other frequency bands.

[0044] Step 4. When a new cognitive user accesses the authorized frequency band, it is assumed that the new cognitive u...

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Abstract

The present invention disclose a multi -user mixed spectrum sharing method and system. Its cognitive users initiate spectrum perception and perceive whether the authorized frequency band is idle; if I perceive the authorized frequency band, it is recognized that users intend to adopt the opportunity spectrum sharing mode.The transmitting power of the transmission probability is connected to the authorized frequency band; if the user occupies the authorized frequency band, that is, the authorized frequency band is not idle, the transmitting power connection when the user intends to adopt the optimal interrupt probability in the coexistence spectrum sharing modeEnter the authorization frequency band.On the premise of ensuring the communication quality of the main user, the premise of the main user is optimized the probability of the interruption of the cognitive user, and the system spectrum utilization and system capacity are finally improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a multi-user hybrid spectrum sharing method and system. Background technique [0002] Spectrum sharing is one of the important technologies of cognitive radio, in which cognitive users share licensed frequency bands with primary users without interfering with primary users. Currently, there are coexistence spectrum sharing (Underlay) and opportunistic spectrum sharing (Overlay). Underlay mode is to share the frequency band with the primary user when the cognitive user perceives the existence of the primary user. The Overlay mode is to use the access frequency band when the cognitive user perceives that the frequency band is idle. However, in the current research on spectrum sharing of cognitive radio, only the underlay mode and the overlay mode are basically studied separately. In the underlay mode, because the cognitive users can only transmit with ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/10H04W72/08H04W72/54
CPCH04W16/10H04W72/542
Inventor 肖海林王成旭胡悦闫坤欧阳缮谢跃雷侯嘉李民政
Owner GUILIN UNIV OF ELECTRONIC TECH
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