Energy Efficiency Based Ofdma Subcarrier Allocation Method

A sub-carrier allocation and sub-carrier technology, applied in electrical components, orthogonal multiplexing systems, multiplexing communications, etc., can solve the problem of high algorithm complexity, achieve low computational complexity, increase the number of bits, Guaranteed fairness and effect of base rate requirements

Inactive Publication Date: 2016-07-06
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0007] The purpose of the present invention is to solve the above-mentioned high algorithm complexity problem existing in the existing OFDMA network based on energy efficiency resource allocation, and propose a method for allocating OFDMA subcarriers based on energy efficiency

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  • Energy Efficiency Based Ofdma Subcarrier Allocation Method
  • Energy Efficiency Based Ofdma Subcarrier Allocation Method
  • Energy Efficiency Based Ofdma Subcarrier Allocation Method

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0024] The energy efficiency-based OFDMA sub-carrier allocation method proposed in the present invention aims to ensure the fairness and basic rate requirements of each user, achieve network EE performance equivalent to the existing sub-carrier allocation algorithm, and reduce the computational complexity of the allocation algorithm. degree. This is based on the optimal energy efficiency resource allocation model for the downlink of the OFDMA network. The optimal energy efficiency resource allocation model is as follows:

[0025]

[0026] s.t.

[0027]

[0028]

[0029]

[0030] among them, Is the optimal energy efficiency of the network to be solved, W is the sub-carrier bandwidth, P c Is the circuit power of the base station, P is the total network transmission power, and ζ is the reciprocal of the drain efficiency of the power amplifier, Is the channel gain-...

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Abstract

The invention discloses an OFDMA subcarrier allocation method based on energy efficiency, comprising: initializing network parameters, determining the number of subcarriers that should be allocated to each user according to the ratio of the basic transmission rate of each user to the total transmission rate; The noise ratio is averaged. Under the limit of the number of subcarriers allocated to each user, the optimal channel quality allocation principle is used to determine the subcarrier allocation; The subcarrier allocation among energy efficiency users increases the overall energy efficiency of the network and determines the final subcarrier allocation. By adjusting the subcarrier allocation determined according to the optimal channel quality allocation principle, the method of the invention ensures that each user in the network satisfies the basic transmission rate, increases the number of bits transmitted by the network unit Joule, and has low computational complexity. And the achieved energy efficiency is close to the optimal energy efficiency.

Description

Technical field [0001] The invention belongs to the technical field of wireless communication, and specifically relates to an energy efficiency-based Orthogonal Frequency Division Multiple Access (OFDMA, Orthogonal Frequency Division Multiple Access) subcarrier allocation method. Background technique [0002] With the rapid development of high-speed wireless data services, energy consumption has attracted more and more attention. According to reports, for mobile operators, the energy consumed by wireless access accounts for 70% of the energy consumption of the entire network, while base stations are mobile The most important source of energy consumption in the operation process is dedicated to the study of energy-saving issues in base stations. The design based on energy efficiency has become more and more important and an inevitable trend. [0003] OFDMA technology divides the system transmission bandwidth into a series of orthogonal non-overlapping sub-carrier sets, and allocates...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04J11/00
Inventor 冷甦鹏邱畅啸吴凡黄晓燕
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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