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OFDMA (orthogonal frequency division multiple access) system resource distributing method based on potential game

A resource allocation and user technology, applied in the resource allocation field of OFDMA system

Active Publication Date: 2015-07-22
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] In order to solve the deficiencies of the prior art, reduce co-channel interference in OFDMA cells, and alleviate the problem

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  • OFDMA (orthogonal frequency division multiple access) system resource distributing method based on potential game
  • OFDMA (orthogonal frequency division multiple access) system resource distributing method based on potential game
  • OFDMA (orthogonal frequency division multiple access) system resource distributing method based on potential game

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[0034] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

[0035] Assuming a single-cell OFDMA system as figure 1 As shown, the base station BS is at the center of the cell, the cell radius is r, the cell contains N cellular users, and each cellular user uses a subcarrier in the system, which are mutually orthogonal to each other, and the number of subcarriers is related to the number of cellular users. The same is N, and it is assumed that each cellular user i uses the corresponding i-th subchannel. The system contains D D2D user pairs, each D2D user pair has a transmitter and a receiver, and has an interference radius centered on the receiver. ...

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Abstract

The invention discloses an OFDMA (orthogonal frequency division multiple access) system resource distributing method based on a potential game. The OFDMA system resource distributing method includes the step of (1) computing a target signal to noise ratio of a D2D user of multiplexing cellular user channel resources; (2) computing corresponding jamming radiuses of the D2D users; (3) establishing a collision matrix in sub-channel usage of each D2D user according to the jamming radius of each D2D user; (4) enabling the D2D user to play a game with other D2D users to enable an own effect function to reach the maximal value; (5) giving up to use a sub-channel resource if a conflict user exists within the jamming radius of the D2D user, and selecting an optimal sub-channel for data transmission; (6) judging whether the game is over or reaches to the maximum number of iterations or not, if not, repeating the step (5) and the step (6) until the game is over or reaches to the maximum number of iterations after updating the signal to noise ratio of the D2D user. The OFDMA system resource distributing method has the advantages that same frequency interferences in an OFDMA community are reduced, and the problem of shortage in spectrum resources is solved.

Description

technical field [0001] The invention relates to the field of wireless channel resource allocation, in particular to a potential game-based OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access) system resource allocation method. Background technique [0002] Due to the demand for high-speed transmission in wireless communication and the advantages of OFDMA technology in the allocation of sub-channels, the efficiency of spectrum resources and the robustness against multipath fading, people have a strong interest in OFDMA technology. The OFDMA technology is an evolution of the OFDM technology and has been widely used in WiMAX and 3GPP technologies. In the OFDMA system, the channel is divided into multiple sub-carriers that are orthogonal to each other, which avoids co-channel interference of cellular users in the cell. However, D2D users are introduced into the cell, and the D2D users reuse the channel resources of the cellular us...

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Application Information

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IPC IPC(8): H04W72/04H04L27/26
Inventor 王保云仝妍
Owner NANJING UNIV OF POSTS & TELECOMM
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