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Power allocation method based on energy efficiency optimization in non-orthogonal multiple access systems

A non-orthogonal multiple access and access system technology, applied in the field of power distribution based on energy efficiency optimization, to achieve the effect of improving energy efficiency

Active Publication Date: 2022-02-22
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

5G mobile communication is committed to the further improvement of spectrum efficiency and system energy efficiency. However, the traditional orthogonal multiple access technology (OMA) is difficult to meet these requirements. In this context, Saito et al. proposed the non-normal Non-orthogonal multiple access (NOMA)

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  • Power allocation method based on energy efficiency optimization in non-orthogonal multiple access systems
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  • Power allocation method based on energy efficiency optimization in non-orthogonal multiple access systems

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Embodiment Construction

[0038] Embodiments of the present invention are described in detail below in conjunction with accompanying drawings and specific examples:

[0039] figure 1 The NOMA downlink model diagram based on OFDMA technology is given. The total number of users in the cell is M, and the total system bandwidth B is divided into N SB subbands, the number of multiplexing users in each subband is N, and the bandwidth size of each subband is w=B / N SB . define N max The maximum number of users allowed to multiplex for the same subband, in the scheduling process, N should be less than or equal to Nmax . The channel response coefficient from base station to multiplexing user n is g n Represents the Rayleigh fading coefficient of multiplexing user n, d n Indicates the distance from the base station to multiplexing user n, and α indicates the link loss index. The base station knows the instantaneous channel state information of all users, without loss of generality, assume that the users a...

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Abstract

The invention belongs to the field of mobile communication, and specifically relates to a power allocation method based on energy efficiency optimization in a non-orthogonal multiple access system. The method includes: determining a minimum target throughput according to the service quality requirement of each multiplexing user; The minimum transmission power requirement of each sub-band is solved separately for the target throughput; then, the minimum total energy consumption of multiplexing users in the sub-band is the goal, and the minimum target throughput and minimum power requirements of the users are satisfied as constraints, and an energy efficiency optimization model is proposed; Then based on the Lagrange multiplier method and KKT conditions, the power allocation coefficient in the energy efficiency optimization problem is solved; then the fractional programming Dinkelbach method is used to determine the optimal power consumption rate in the energy efficiency optimization problem; finally based on the optimal power allocation coefficient and the optimal power consumption rate to determine the optimal value of energy efficiency; the invention can meet the minimum throughput performance requirement of each multiplexing user, and can greatly improve the energy efficiency of the system.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a power allocation method based on energy efficiency optimization in a non-orthogonal multiple access (NOMA) system. Background technique [0002] With the rapid development of the mobile Internet and the Internet of Things, the fifth-generation (5th-Generation, 5G) mobile communication system may face severe challenges in terms of user experience rate, delay, energy efficiency, number of connections, and traffic density. 5G mobile communication is committed to the further improvement of spectrum efficiency and system energy efficiency. However, the traditional orthogonal multiple access technology (OMA) is difficult to meet these requirements. In this context, Saito et al. proposed the non-normal Cross multiple access technology (non-orthogonal multiple access, NOMA). The main idea of ​​NOMA is to use the power domain to multiplex multiple users on the same time-freq...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/08H04W72/12H04W72/54
CPCH04W72/0473H04W72/1263H04W72/543H04W72/542Y02D30/70
Inventor 邓天垠苏开荣吴广富李云
Owner CHONGQING UNIV OF POSTS & TELECOMM