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An Adaptive Femtocell Power Control Method

A home base station and power control technology, applied in power management, wireless communication, electrical components, etc., can solve problems such as failure to work normally, algorithm performance degradation, etc.

Active Publication Date: 2018-05-25
SOUTH CHINA UNIV OF TECH +1
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reality is that femtocells are often deployed randomly, and a large number of femtocells will be deployed in the same area or place. Once the deployment of femtocells or the network scale changes, the performance of these solutions or algorithms will decline. Parameters need to be retuned, and some don't even work anymore

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  • An Adaptive Femtocell Power Control Method

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Embodiment

[0026] Such as figure 1 As shown, according to the agreement, the home base station can measure the reference signal received power (Co-channel RSRP) P i , As a reference for neighboring home base station users' interference from other home base stations. Counting all the measured power, we can get the overall interference of the same-layer Femtocell, that is: Calculate P total The unit of time is mW.

[0027] Based on this measured value, the expression form of the interference factor can be designed, and the present invention is not limited to its specific expression form, and it can be directly quoted or mapped in sections. It can be used as an additive factor or a multiplicative factor. The embodiment of the present invention provides a directly quoted additive co-layer interference factor to illustrate the proposed method, and the calculation method is:

[0028] P H =max(P total -P threshold ,0),

[0029] The power unit here is dB, which is to be consistent with the power...

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Abstract

The invention discloses a self-adapting femtocell power control method. The method comprises the following steps that (1) for a heterogeneous network which is newly deployed with femtocells, an original power control algorithm or a user defined power control algorithm is used for disposing power to the femtocells, for example, and a proper transmitting power is set according to the coverage area of the femtocells and the flow condition of access users; (2) a self-adapting power regulation algorithm is automatically started after the femtocells are in a working stage, the algorithm introduces parameters which can reflect the interference degree of other femtocells on the same layer, when it is found that nearby femtocells are increased to a certain extent, and the transmitting power of the femtocells is reduced, so that interference increase caused by the newly disposed or newly started femtocells is counteracted; otherwise, when the whole interference level is lowered, the transmitting power of the femtocells is increased according to needs. The self-adapting femtocell power control method has the advantages that the transmitting power of the femtocells can be adjusted in a self-adapting mode, and non-authorized macrocell users in the coverage area of the femtocells are effectively protected.

Description

Technical field [0001] The present invention relates to a wireless communication technology, in particular to an adaptive power control method of a home base station. Background technique [0002] With the development of mobile communication technology, the proportion of data services in cellular network traffic is increasing. And most of the traffic in the cellular network occurs in an indoor environment, so the introduction of Femtocells can effectively offload traffic from the macro network and better support the business needs of large data volumes. [0003] Since the home base station can be purchased and configured by the user, and often use the same frequency as the macro base station to improve the degree of frequency reuse. Therefore, Femtocells may cause serious downlink interference to unauthorized macro cell users and other Femtocell users. Therefore, inter-cell interference coordination methods need to be introduced. Power control of Femtocells is one of them. At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W52/04H04W52/34
CPCH04W52/244
Inventor 冯穗力邓晓锋张远见丁跃华唐玮俊李馨
Owner SOUTH CHINA UNIV OF TECH