Method for energy-efficient transmission of robustness in cognitive network

Abstract

The invention discloses a method for energy-efficient transmission of robustness in a cognitive network. According to the method for energy-efficient transmission of the robustness in the cognitive network, channel state information of relevant channels is measured through the receiving end of a secondary user and is fed back to the sending end of the secondary user; the sending end of the secondary user carries out measurement multiple times to determine an uncertain set of the gain of each channel; the secondary user establishes a model according to a robustness optimizing method to maximize secondary user energy efficiency; the poorest channel gain is solved, and a service quality requirement constraint of a main user is converted into a convex constraint; the optimal sending power is solved according to a power distribution algorithm, transmission is carried out on each channel according to the optimal sending power, and the optimal transmission power of the robustness is solved when the channel state information is uncertain. The method for energy-efficient transmission of the robustness in the cognitive network can be used for cognitive network communication and has the advantages that the maximization of the energy efficiency of the secondary user is guaranteed under the circumstance that the channel state information is uncertain, interference power at the receiving end of the main user is strictly controlled, the service quality of the main user is guaranteed, and negative influence of the uncertainty of the channel state information on the performance of the cognitive network is effectively eliminated.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a method for robust energy-efficient transmission in a cognitive network. Background technique [0002] Cognitive radio networks allow secondary users to use the authorized spectrum of primary users to share spectrum without reducing the quality of service (QoS) of primary users, so as to improve the utilization rate of the entire spectrum. On the other hand, the wireless transmission technology that maximizes energy efficiency has become a hot issue in green communication. In particular, in cognitive radio networks, how secondary users can maximize their own energy efficiency while improving spectrum utilization is a hot topic of current research. [0003] Most existing literature assumes that the channel state information CSI is accurate when maximizing the energy efficiency of secondary users. However, due to the time-varying characteristics of the...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for robust energy-efficient transmission in a cognitive network, aiming to solve the problem of secondary user energy efficiency caused by the existing method of maximizing energy efficiency in a cognitive radio network without considering channel information uncertainty. deterioration, reducing the quality of primary user service

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