Power control method based on SWIPT (Simultaneously Wireless Information and Power Transfer) in heterogeneous cellular network

Abstract

The invention provides a power control method based on SWIPT (Simultaneously Wireless Information and Power Transfer) in a heterogeneous cellular network. The method comprises the steps of initializing system parameters, establishing a maximum energy efficiency optimization model according to a system scene, converting the model into a power control problem of a base station, and converting an original problem into a joint optimization problem between base station transmission power and a user side power distribution coefficient through variable substitution; under the condition that the userside power distribution coefficient rhok is fixed, carrying out solution through adoption of a subgradient method based on a Lagrange multiplier, and obtaining the optimum power control scheme P<k><*>of the base station according to a KKT condition; and obtaining the optimum energy efficiency value lambda<k><*> of a system through combination of a bisection method according to the obtained powercontrol scheme P<k><*>. According to the optimum power control method provided by the invention, the energy efficiency of the cellular system can be improved, the energy limited problem of a mobile device also can be effectively solved, and the method has certain guiding significance in a practice aspect.

Description

technical field [0001] The invention belongs to the technical field of power control in heterogeneous cellular networks, in particular to a power control method based on SWIPT in heterogeneous cellular networks. . Background technique [0002] With the rapid development of mobile communication and the widespread popularity of smart phones, the energy consumption of cellular networks is increasing day by day; on the other hand, batteries with limited capacity are still used to power network equipment, but there are some special environments in actual communication scenarios, such Sensors placed in the enemy's battlefield, medical chips implanted in the human body, etc., we cannot often replace the batteries for these devices, or charge them through wired methods, which greatly reduces the service life of the devices. At present, there are two main methods to solve the above problems. First, improve system energy efficiency through resource allocation and optimization algorit...

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Problems solved by technology

However, in the research scenario, the author did not consider the interference of small cell base stations to macro users, which has a certain gap with the actual cellular network, because operators are more concerned about the communication quality of macro users

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