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Resource allocation method of ofdma system based on potential game

A resource allocation and channel resource technology, applied in the field of wireless channel resource allocation, to achieve the effect of reducing co-channel interference and increasing signal-to-noise ratio

Active Publication Date: 2018-03-09
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 of spectrum resource shortage, the present invention provides a resource allocation method for OFDMA systems based on potential game

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  • Resource allocation method of ofdma system based on potential game
  • Resource allocation method of ofdma system based on potential game
  • Resource allocation method of ofdma system based on potential game

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

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

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Abstract

The present invention discloses a potential game-based OFDMA system resource allocation method, including: (1) calculating the target signal-to-noise ratio of D2D users who reuse channel resources of cellular users; (2) calculating the corresponding interference radius of D2D users; (3) According to the interference radius of each D2D user, the conflict matrix of each D2D user's subchannel is established; (4) D2D users play games with D2D users to maximize their own effect function; (5) If the D2D user interference radius If there is a conflicting user in the memory, give up using the sub-channel resource and select the sub-optimal sub-channel to transmit data; (6) judge whether the game converges or reaches the maximum number of iterations, if it does not converge and the maximum number of iterations is not reached, update the D2D user’s information After the noise ratio, repeat A5-A6 until convergence or the maximum number of iterations is reached. The invention reduces the same-frequency interference in the OFDMA cell and alleviates the problem of spectrum resource shortage.

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