Quantum Chemical Reaction Optimization Multi-Relay Selection Method for Cognitive Relay Networks

A technology of cognitive relay and chemical reaction, applied in the field of cognitive relay selection, can solve problems such as no consideration of ownerless user constraints, low system throughput, and low complexity

Active Publication Date: 2020-12-04
HARBIN ENG UNIV
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AI Technical Summary

Problems solved by technology

The "Multi-Relay Selection Method for Cognitive Relay Network" published in "Journal of Electronics and Information Technology" by Yang Long et al. defines the efficiency of relay cooperation based on the first-order partial derivative characteristics of the signal-to-noise ratio of the destination node during multi-relay cooperation. , an iterative relay selection scheme based on cooperative efficiency is proposed, the complexity is low, but the system throughput is also low, and the situation of no master user constraint is not considered
The "Low Complexity Multiple Relay Selection Scheme for Cognitive Relay Networks" published by Moonchang Choi et al. at the "IEEE Vehicular Technology Conference" proposed a simple multi-relay selection method, that is, according to channel information, more power is allocated to the main The relay with less user interference is selected according to the power allocation scheme, and the situation of no master user constraint is not considered

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  • Quantum Chemical Reaction Optimization Multi-Relay Selection Method for Cognitive Relay Networks

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Embodiment Construction

[0080] The following examples of the present invention will be described in more detail.

[0081] 1, the establishment of the cognitive system relay selection model, cognitive relay network by a user of the source node cognitive s, d and L the destination node enlargement - forward half-duplex relay components. In the main user constraints, user awareness source node s, and the relay destination node d r i (I = 1,2, ..., L) with a primary user receiver is authorized to share the bandwidth of the band W, cognitive user source node to a certain destination node link is:

[0082]

[0083] P cognitive power transmission source node user s Neither exceed its maximum transmission power It is not possible to make the interference of the primary user receiver after the passage of the channel exceed the threshold I th . Further, each using the same frequency band at the relay forwarding information, neither its transmit power beyond their maximum transmit power, can not be such that the t...

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Abstract

The invention provides a quantum chemistry reaction optimization multi-relay selection method of a cognitive relay network. The method comprises steps of: 1, establishing a cognitive system relay selection model; 2, initializing a quantum molecule set and a system parameter; 3, evaluating the potential energy of all quantum molecules in the set and selecting the measurement state of the quantum molecule with the lowest potential energy as a global optimal solution; 4, arranging the kinetic energy of quantum molecules in a descending order, and performing decomposition reaction, invalid collision, and synthetic reaction; 5, evaluating the potential energy of newly generated quantum molecules, and if the minimum potential energy of the newly generated quantum molecules is less than the minimum potential energy of the previous generation, marking the newly generated quantum molecules as a new global optimal solution; and 6, if the number of iteration times is less than a preset maximum number of iteration times, returning to step 4, otherwise, outputting the global optimal solution. The method balances the primary user constraint condition and non-primary user constraint condition of the cognitive relay network, and chooses a relay selection scheme that maximizes the system throughput based on a quantum chemistry reaction mechanism.

Description

Technical field [0001] The present invention relates to a cognitive relay selection method. Background technique [0002] Cognitive Radio Networks can adjust their parameters through changes in the environment, with strong adaptive ability, by re-use the idle authorized frequency band, improve the utilization of wireless spectrum, and now become wireless The important way for the shortage of spectrum resources, providing a great development space for the stages of wireless communication systems. In a cognitive relay network, there is often a plurality of candidate relay nodes. The influence of geographic location and channel fading, the ability of the trunks improve the quality of cognitive users (SU) transmission quality and the interference caused by the primary user, PU, ​​so how to choose the appropriate relay The transfer of cognitive users is one of the key issues of cognitive relay network research. [0003] Since relay choices are NP-HARD issues, with the increase in the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04W40/22
CPCH04W16/14H04W40/22Y02D30/70
Inventor 高洪元苏雨萌张世铂刘丹丹刁鸣李佳池鹏飞
Owner HARBIN ENG UNIV
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