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An interference-aware distributed robust downlink power control method

A power control and distributed technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as poor robustness of power control

Active Publication Date: 2019-10-25
XIDIAN UNIV
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Problems solved by technology

The disadvantage of this method is that it simply assumes that the channel information is completely known, resulting in poor robustness of power control

Method used

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  • An interference-aware distributed robust downlink power control method
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  • An interference-aware distributed robust downlink power control method

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Embodiment Construction

[0050] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0051] refer to figure 1 , the scenario adopted in this embodiment includes 1 macro base station MeNB, 6 home base stations SeNB, and multiple home base station users SUE. For the convenience of analysis, the system model is simplified as a scenario where one home base station SeNB serves one user SUE, and the home base station and users are evenly distributed in the scene. Here, one of the home base stations SeNB is selected 1 Perform power control, that is, set the SeNB 1 As a small base station i, the densely deployed femtocells reuse the spectrum of the macro base station at full frequency. Considering the intra-layer interference here, then for the user SUE 1 , except the smal...

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Abstract

The invention provides an interference sensing distributed robust downlink power control method and aims at realizing robust distributed power control of small base stations in an ultra dense networkenvironment with uncertain channel information. The method comprises the realization steps that one small base station calculates own approximate interference mean field, sets a power control time interval, obtains an interference state space, discretizes the power control time interval and the interference state space, calculates related iterative step sizes, and initializes an established matrixcomposed of the interference mean field, a Lagrange operator and a power level; updating formulas for the interference mean field, the Lagrange operator and the power level are derived; and the smallbase station assigns the interference average field to a termination variable, updates the interference mean field, the Lagrange operator and the power level through utilization of the three updatingformulas, judges whether the power level is converged or not, stops iterating if the power level is converged and repeats the steps if the power level is not converged. According to the method, on the premise of ensuring the communication quality of a user, the power control robustness and system energy efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to an interference-aware distributed robust downlink power control method. It can be used in interference management of network communication systems deployed with ultra-dense small base stations. Background technique [0002] With the development of wireless communication technology and the explosive growth of mobile applications, it is becoming more and more difficult for the traditional cellular structure to meet people's growing demand for data services. The ultra-dense deployment of femtocell heterogeneous cellular network co-existing with traditional base stations can fully reuse limited frequency resources, that is, femtocells and macro base stations use the same frequency band, which can not only improve spectrum efficiency, but also shorten the distance between users and access points. However, there is serious co-channel interference at the same time, which l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/14H04W52/24
Inventor 杨春刚代浩翔张越肖佳吴春波王玲霞王昕伟
Owner XIDIAN UNIV
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