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Optimal robust power control method under non-ideal CSI in two-layer Femtocell network

A power control, non-ideal technology, applied in power management, network planning, electrical components, etc., can solve problems such as difficult to obtain, achieve good feasibility and practicability, fast execution speed, and strong channel adaptability

Active Publication Date: 2017-03-08
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, in actual wireless communication systems, due to factors such as time-varying characteristics of the channel, quantization errors, and time delays, it is generally difficult to obtain ideal CSI

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  • Optimal robust power control method under non-ideal CSI in two-layer Femtocell network
  • Optimal robust power control method under non-ideal CSI in two-layer Femtocell network
  • Optimal robust power control method under non-ideal CSI in two-layer Femtocell network

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Embodiment Construction

[0048] 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.

[0049] Technical scheme of the present invention is as follows:

[0050] The invention discloses an optimal robust power control method under non-ideal CSI in a two-layer Femtocell network. The factor sorts the Femtocell users in ascending order; calculates the Lagrangian determination factor of the Femtocell user; compares the Lagrangian allowable factor of the Femtocell user with the Lagrangian determination factor, and calculates the Lagrangian factor if the conditions are met , the optimal robust power is given, and the method ends; otherwise, the power of the Femtocell user with the largest sorting factor is set to zero, and other Femtocell users continue to follow the fourth step until the condition...

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Abstract

The invention requests to protect an optimal robust power control method under non-ideal CSI in a two-layer Femtocell network. Under the condition that the channel estimation error is considered and the interference constraints of macro cellular users are satisfied, the total throughput of Femtocell users is maximized by controlling the transmitting power of the Femtocell users. In order to strictly protect the interference constraints of macro cellular users, a Max-Min optimization problem with unlimited constraints is converted into a convex optimization problem with limited constraints based on the idea of robust optimization and a worst criterion mechanism. Based on the optimality conditions of the convex optimization problem, a closed solution of the optimal robust power of Femtocell users is given. The method has the advantage that the method is of low computing complexity and can strictly guarantee the QoS of macro cellular users and improve the throughput of Femtocell users, and is particularly suitable for a two-layer Femtocell network under non-ideal CSI.

Description

technical field [0001] The present invention relates to the technical field of power control under non-ideal CSI in a two-layer Femtocell network, in particular to an optimal robust power control method based on throughput maximization in a two-layer Femtocell network. Background technique [0002] With the rapid development of a new generation of mobile communication technology, people's requirements for quality of service (QoS) and data transmission rate of wireless communication services are increasing day by day. Studies have shown that more than 90% of data communications and more than 67% of voice communications are done indoors. However, the carrier frequency used in wireless communication is getting higher and higher, so that the wave penetration ability is getting worse and worse, and the signal attenuation of indoor users is increasing, which makes it difficult to realize high-quality indoor communication services. Femtocell technology can expand network coverage,...

Claims

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Application Information

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IPC IPC(8): H04W16/20H04W52/24H04W52/26H04W52/46
CPCH04W16/20H04W52/241H04W52/265H04W52/46
Inventor 王梦莉万晓榆王正强樊自甫
Owner CHONGQING UNIV OF POSTS & TELECOMM
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