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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  • Abstract
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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 cas

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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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Example Embodiment

[0022] The invention is based on the combined power control method of multiple pairs of terminal direct links based on geographic frequency 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-to-noise ratio at the receiving end of the primary user and determine 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 the optimal transmit power according to the signal-to-interference and noise ratio of the primary user’s receiving end Judge for iterative operation. The specific steps are as follows:

[0023] Step 1. The access point obtains the location information of each second...

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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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