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Cognitive NOMA network stubborn resource allocation method based on energy efficiency

A resource allocation and network technology, applied in data exchange networks, transmission monitoring, digital transmission systems, etc., can solve problems such as difficulty in modeling and analysis

Active Publication Date: 2019-11-05
CHONGQING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

The resource allocation problem under the imperfect channel state is compared with the traditional nominal optimization problem. The optimal resource allocation algorithm obtained can make the communication system more robust, and the process of modeling, analysis and solution will be relatively more difficult.

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  • Cognitive NOMA network stubborn resource allocation method based on energy efficiency
  • Cognitive NOMA network stubborn resource allocation method based on energy efficiency
  • Cognitive NOMA network stubborn resource allocation method based on energy efficiency

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Embodiment Construction

[0066] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0067] The technical scheme that the present invention solves the problems of the technologies described above is:

[0068] Such as figure 1 As shown, the present invention considers the underlay type (literal translation of the English word underlay, technical term for cognitive radio direction) cognitive NOMA network downlink network model, wherein one primary user base station provides services for K primary users, and one secondary user base station serves M secondary users. Secondary users access N subchannels through NOMA, assuming M n secondary users share the same subchannel n, and M=M 1 +…+M N . Define the sets of primary users, secondary users and sub-channels as k∈{1,...,K}, m∈{1,...,M} a...

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Abstract

The invention discloses a cognitive NOMA network stubborn resource allocation method based on energy efficiency, and belongs to the technical field of resource allocation in a wireless network. Aimingat inherent randomness of a wireless communication system channel, channel parameter perturbation influence is introduced, secondary user transmitting power, interference based on outage probabilityand minimum data rate are considered as constraint conditions, secondary user network total energy efficiency is taken as an objective function, and a fractional programming problem under multiple constraint conditions is established. The method comprises the following steps: firstly, converting an original probability constraint non-convex problem into a closed geometric programming problem by utilizing continuous convex approximation and parameter transformation, then obtaining the optimal transmission power of a secondary user by adopting a Tickerbach method and a Lagrange duality method, and finally providing an optimal resource allocation method based on iteration. Simulation results show that compared with some existing methods, the method has the best stubborn performance, and meanwhile good real-time performance can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of wireless network resource allocation, and in particular relates to a robust resource allocation method based on user outage probability in a cognitive NOMA wireless network. Background technique [0002] With the rapid growth of the number of mobile wireless users and the increasing variety of wireless network applications in recent years, higher requirements are placed on the spectrum efficiency, capacity, and user experience of the network. Therefore, the non-orthogonal multiple access (NOMA) technology emerges at the historic moment and is considered to be one of the key technologies of the next generation wireless communication system. Different from Orthogonal Multiple Access technology, one subchannel can only be occupied by one user, multiple users in NOMA can effectively use all available spectrum resources by allocating different transmission power levels. Therefore, the NOMA technology can prov...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/382H04B17/391H04L12/24H04B17/345
CPCH04B17/382H04B17/3912H04L41/145H04B17/345
Inventor 吴翠先杨洋徐勇军李雯静
Owner CHONGQING UNIV OF POSTS & TELECOMM
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