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D2D user resource distribution method based on multicarrier communication

A multi-carrier communication and user resource technology, which is applied in the field of D2D user resource allocation based on multi-carrier communication, can solve problems such as the lack of research on multi-carrier communication, and achieve the effect of improving utilization

Active Publication Date: 2014-06-25
青岛联众芯云科技有限公司
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, research on multi-carrier communication for D2D users is still relatively lacking.

Method used

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  • D2D user resource distribution method based on multicarrier communication
  • D2D user resource distribution method based on multicarrier communication
  • D2D user resource distribution method based on multicarrier communication

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Embodiment Construction

[0030] The basic idea of ​​the present invention is to allocate resources for multi-carrier communication to D2D users. First, subcarriers are allocated to users. Users make full use of the number of carriers provided by the system, and weigh the signal-to-noise ratio between D2D users and cellular users, and suppress the two kinds of users to the greatest extent. Interference between D2D users, each D2D user is allocated multiple carriers for communication. After all the carriers are allocated, the goal is to maximize the D2D user capacity, and the minimum signal-to-noise ratio requirement of the cellular user and the upper limit of the D2D user transmit power are constrained Conditionally establish the optimization function, introduce Lagrangian multipliers and use the subgradient method to update, when all Lagrange multipliers meet the convergence conditions, the power allocated on each carrier is obtained.

[0031] attached figure 1 It is a schematic diagram of the interfe...

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Abstract

The invention discloses a D2D user resource distribution method based on multicarrier communication, comprising steps of calculating signal to noise ratio on different subcarriers of each D2D user, distributing a subcarrier to each user according to the calculated signal to noise ratio value to enable the signal to noise ratio of each user to be greatest on the distributed subcarrier, performing distribution on the rest of subcarriers according to the signal to noise ratio of a weighing cellular user and the signal to noise ratio of the D2D user until all the subcarriers are distributed to the users, utilizing a subgradient method to perform iteration on lagrange factors and distributing emission power of the D2D user on each subcarrier in order to ensure the cellular user to meet the requirement of the lowest signal to noise ratio and maximization of D2D user system capacity. The D2D user resource distribution method performs subcarrier distribution on the D2D user on the premise that the cellular user lowest signal to noise ratio is guaranteed and establishes an optimized function which targets maximization of system capacity of the D2D user system and uses the cellular user signal to noise ratio and the D2D user emission power as the constraint condition so as to realize the subcarrier distribution and power distribution of the D2D user.

Description

technical field [0001] The present invention relates to a D2D user resource allocation method, in particular to a D2D user resource allocation method based on multi-carrier communication. Background technique [0002] Device-to-Device (D2D) communication is a new technology that allows short-distance terminals to communicate directly by reusing cell resources under the control of the system. By allowing communication between users in close proximity, the transmit power of the terminal can be reduced; users can directly exchange data without forwarding by the base station, which is beneficial to reduce the burden on the base station; multiplexing resources with cellular users can improve the spectrum utilization of the system , to a certain extent solve the problem of lack of spectrum resources in wireless communication systems. Application examples of D2D communication are multimedia downloading, video streaming, online gaming, and peer-to-peer file sharing. [0003] Howev...

Claims

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Application Information

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IPC IPC(8): H04W72/04
Inventor 朱琦景雯雯
Owner 青岛联众芯云科技有限公司
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