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Multi-terminal direct link joint power control method based on geographical spectrum database

A technology of terminal direct connection and control method, applied in power management, wireless communication, electrical components and other directions, can solve problems such as waste of spectrum resources, degradation of communication quality, interference, etc., to achieve capacity enhancement, simple and efficient iterative algorithm, and throughput performance improvement Effect

Active Publication Date: 2016-01-13
PLA UNIV OF SCI & TECH
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Problems solved by technology

However, these works did not take into account the coordination and coexistence of multiple secondary user links, because if the coordination and coexistence of multiple secondary user links are taken into account, it will make the power control of secondary users In this case, if there is no reasonable mechanism to coordinate the interference between the secondary user links, the communication quality will be degraded, so that each user may not be able to obtain satisfactory communication benefits, resulting in Further waste of spectrum resources

Method used

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  • Multi-terminal direct link joint power control method based on geographical spectrum database
  • Multi-terminal direct link joint power control method based on geographical spectrum database
  • Multi-terminal direct link joint power control method based on geographical spectrum database

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Embodiment Construction

[0022] The present invention is based on the joint power control method of multiple pairs of terminal direct links based on the geographic spectrum database, such as figure 1 As shown, it includes the following steps: 1. Obtain the location information of each user, use the model to calculate the loss value of each link, and initialize the transmit power value of each user; 2. Calculate the signal-to-interference-noise ratio value of the main user receiving end and judge whether it is within a reasonable range ; 3. Obtain the theoretical transmit power value of the secondary user in the D2D link when the throughput of each D2D link reaches the maximum; 4. Calculate the optimal transmit power and calculate Judgment for iterative operation. Each step is as follows:

[0023] Step 1. The access point obtains the location information of each secondary user, and according to the location information of the secondary user, obtains the available channel resources from the geographic ...

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Abstract

The invention provides a multi-terminal direct link joint power control method based on a geographical spectrum database, comprising the steps as follows: acquiring the position information of each user, using a model to calculate the loss value of each link, and initializing the transmission power value of each user; calculating the signal-to-interference plus noise ratio (SINR) value of a primary user receiving end and judging whether the SINR value is within a reasonable range; calculating the theoretical transmission power value of a secondary user in each D2D link when the throughput of the D2D link is maximized; and calculating the optimal transmission power, and performing iterative operation according to the judgment on the SINR value of the primary user receiving end. According to the invention, coordinate coexistence of the links of multiple secondary users is fully considered, the total throughput of a system composed of the secondary user links is maximized by reasonably controlling the power of each secondary user, and the capacity of the system composed of the secondary user links can be further increased.

Description

technical field [0001] The invention belongs to the technical field of wireless communication cognitive radio, and in particular relates to a method for joint power control of direct links between multiple pairs of terminals based on a geographic spectrum database. Background technique [0002] The shortage of spectrum resources in the current wireless communication field has become one of the main factors restricting the development of wireless communication. The emergence of cognitive radio technology can effectively alleviate this situation. [0003] Among the key technologies of cognitive radio, spectrum sensing has very strict requirements on the sensing capabilities of devices. In addition, even cognitive devices with strong spectrum sensing capabilities cannot avoid some problems caused by shadows, such as hidden terminals. Therefore, spectrum sensing cannot well guarantee the communication of authorized users. [0004] The geographic spectrum database technology is ...

Claims

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Application Information

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IPC IPC(8): H04W52/04
Inventor 王金龙沈良薛震丁国如吴启晖高瞻郑学强
Owner PLA UNIV OF SCI & TECH
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