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OFDMA subcarrier distribution method based on energy efficiency

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, ensure fairness and basic Rate requirements, the effect of increasing the number of bits

Inactive Publication Date: 2014-02-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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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  • OFDMA subcarrier distribution method based on energy efficiency
  • OFDMA subcarrier distribution method based on energy efficiency
  • OFDMA subcarrier distribution method based on energy efficiency

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Embodiment Construction

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

[0024] An OFDMA subcarrier allocation method based on energy efficiency proposed by the present invention aims to ensure the fairness and basic rate requirements of each user, achieve network EE performance equivalent to the existing subcarrier allocation algorithm, and reduce the computational complexity of the allocation algorithm Spend. 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] in, is the optimal energy efficiency of the network to be solved, W is the subcarrier bandwidth, P c is the circuit power of the base station, P is the total power transmitted by the network, ζ is the reciprocal of the drain efficiency of the power amplifier...

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Abstract

The invention discloses an OFDMA subcarrier distribution method based on energy efficiency. The method comprises steps that: network parameters are initialized, the subcarrier number distributed to each user is determined according to a ratio of a basic transmission rate of each user to a total transmission rate; equalization processing on a network channel gain noise ratio is carried out, subcarrier distribution is determined by employing an optimal channel quality distribution principle under the limit of the subcarrier number distributed to each user; and based on subcarrier distribution, subcarrier distribution between a highest energy efficiency user and a lowest energy efficiency user is adjusted according to adjusting rules to make integral network energy efficiency increase, and final subcarrier distribution is determined. Through the method, subcarrier distribution is determined through adjusting according to the optimal channel quality distribution principle, each user in the network is guaranteed to satisfy a basic transmission rate, a transmitted bit number per a network unit Joule is improved, calculation complexity is relatively low, and the realized energy efficiency approaches to the optimal energy efficiency.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular 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, more and more attention has been paid to the issue of energy consumption. It is reported that for mobile operators, the energy consumed in wireless access accounts for 70% of the energy consumption of the entire network, and the base station is the The most important source of energy consumption in the operation process, dedicated to the research of energy-saving issues of base stations, the design based on energy efficiency has become more and more important and has become an inevitable trend. [0003] OFDMA technology divides the system transmission bandwidth into a series of orthogonal non-overlapping ...

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Application Information

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Patent Type & Authority Applications(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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