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Distributed power control method for Femtocell uplink

A power control and distributed technology, applied in power management, wireless communication, electrical components, etc., can solve the problems of mutual interference, unsatisfactory communication effect of Femtocell users, ignoring the requirements of signal-to-interference and noise ratio, etc., and achieve the effect of good performance

Inactive Publication Date: 2012-04-18
NANJING UNIV OF POSTS & TELECOMM
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  • Description
  • Claims
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Problems solved by technology

[0004] The problem to be solved by the present invention is: there is a mutual interference problem in Femtocell technology, and the existing power control method ignores the signal-to-interference-noise ratio requirement of each Femtocell user, and reduces the Femtocell user's influence on the macro by reducing the Femtocell user's preset SINR value. User interference, and there are many Femtocell users in the network that have not reached their preset SINR value, and the communication effect of Femtocell users is not ideal

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  • Distributed power control method for Femtocell uplink

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Embodiment Construction

[0017] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0018] The method of the present invention is based on game theory. For Fetomcell and macrocell base stations, the maximum transmission power of Fetomcell users is limited to ensure that macrousers of macrocell base stations reach their preset signal-to-interference and noise ratio (SINR) h , on this basis, through game iterations, more Femtocell users can achieve their preset signal-to-interference-noise ratio SINR f . like figure 1 As shown, it is assumed that the signal-to-noise ratio (SNR: Signal to Noise Ratio) of the macro user at the edge of the macro cell coverage should reach 20dB, from which the noise σ in the cell can be calculated 2 . Set the signal-to-interference-noise ratio SINR of the macro user h =10dB, the total number of Femtocell users is M, and the maximum value of the interference sum of all Fetomcell users to this macro ...

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Abstract

The invention discloses a distributed power control method for a Femtocell uplink. In the method, based on a game theory, for a Femtocell and a macrocell base station, the maximum transmission power of a Femtocell user is limited so as to ensure that a preset signal to interference plus noise ratio (SINR) of a macro user of the macrocell base station is achieved for the macro user of the macrocell base station, and accordingly, the self preset SINRs of more Femtocell users are achieved for the more Femtocell users by means of game iteration. According to the invention, on the premise of guaranteeing the system capacitive properties, the power control for the Femtocell users is preformed in a game manner by regulating the upper limit of the transmission power of the Femtocell users, different SINR requirements of different Femtocell users are taken into consideration, all the Femtocell users are ensured to achieve the self preset SINRs as much as possible, and the distributed power control method disclosed by the invention has better performances compared with the conventional method.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, relates to Femtocell technology and a game method of femtocell base stations, and is a distributed power control method for Femtocell uplinks. Background technique [0002] Femtocell technology is a solution to expand the indoor coverage of mobile communications. It is launched according to the development of 3G and the trend of broadband mobility in recent years. It works in the authorized frequency band and accesses through broadband, such as DSL, cable, optical fiber, etc. Connected to the operator's network, its main function is to provide better signal coverage and service quality for home indoors or small commercial institutions. Mutual interference problem has always been an important problem to be solved by Femtocell. Due to the limitation of frequency resources, when Femtocell and macrocell base stations are deployed on the same frequency, serious interference problems ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/14H04W52/24
Inventor 潘沛生潘晓亮
Owner NANJING UNIV OF POSTS & TELECOMM
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