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Energy-efficient resource allocation method for multi-carrier non-orthogonal multiple access system

A technology for non-orthogonal multiple access and access systems, applied in the field of resource allocation based on energy efficiency in multi-carrier non-orthogonal multiple access systems, can solve problems such as high computational complexity, and achieve high computational complexity and balanced systems performance, maximizing system energy efficiency

Active Publication Date: 2022-07-01
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Optimal user scheduling based on exhaustive search is used as system performance benchmark, but it has high computational complexity

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  • Energy-efficient resource allocation method for multi-carrier non-orthogonal multiple access system
  • Energy-efficient resource allocation method for multi-carrier non-orthogonal multiple access system
  • Energy-efficient resource allocation method for multi-carrier non-orthogonal multiple access system

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[0054] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0055] The technical scheme that the present invention solves the above-mentioned technical problems is:

[0056] refer to figure 1 , to study the resource allocation problem of multi-carrier non-orthogonal multiple access system based on energy efficiency, and maximize the energy efficiency of the system. Under the constraints of ensuring user communication quality and base station transmit power, in order to maximize system energy efficiency, a resource allocation algorithm based on joint user scheduling and power allocation is proposed. Since the optimization problem is a non-convex optimization problem and NP-hard problem, the original problem is decoupled into a user and subcarrier matc...

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Abstract

The present invention claims to protect a resource allocation method based on energy efficiency in a multi-carrier non-orthogonal multiple access system, belonging to the field of network resource allocation. By jointly optimizing system user scheduling and power allocation, a method for user scheduling and power allocation is proposed. an iterative algorithm to maximize system energy efficiency. Optimal user scheduling based on exhaustive search is used as a system performance benchmark, but it has high computational complexity. To balance system performance and computational complexity, a new suboptimal user scheduling scheme is proposed to schedule users on different subchannels. Based on the user scheduling scheme, the optimal power allocation for users is derived by the interior point method. By transforming the fractional-form problem into an equivalent subtractive-form optimization problem, an iterative power allocation algorithm is proposed to maximize system energy efficiency. The simulation results show that the proposed user scheduling algorithm can obtain the optimal performance.

Description

technical field [0001] The invention belongs to the problem of energy efficiency in a multi-carrier non-orthogonal multiple access system, and proposes a resource allocation method to maximize energy efficiency. Background technique [0002] Non-Orthogonal Multiple Access (NOMA) utilizes successive interference cancellation techniques at the receiver to improve spectral efficiency. By using this technique, multiple users can be multiplexed on the same subchannel to achieve high sum rates. In this paper, we investigate the energy efficiency improvement of downlink NOMA single-cell networks by considering perfect channel state information. The energy-saving resource scheduling problem is formulated as a non-convex optimization problem with constraints on the probability of outage, the maximum power of the system, the minimum user data rate, and the maximum number of multiplexed users sharing the same subchannel. Unlike previous work, the maximum number of multiplexed users c...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/26H04W52/34H04W52/24
CPCH04W52/265H04W52/346H04W52/241
Inventor 樊自甫孟宪辉张鸿佳王正强成蕖
Owner CHONGQING UNIV OF POSTS & TELECOMM
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