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Synchronization method of femtocell base station and femtocell base station using the method

A technology of femtocells and base stations, applied in the direction of synchronization devices, transmission path separation devices, electrical components, etc., can solve the problems of loss of subcarrier orthogonality and interference, achieve orthogonal performance, eliminate signal interference, and ensure Effects of Uplink Synchronization

Active Publication Date: 2016-12-07
WIRELESS ALLIANCE LLC
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  • Claims
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Problems solved by technology

However, when the time between the two signals 330, 331 is not synchronized (indicated by the area D), there is a problem of losing the orthogonality between the subcarriers and causing interference

Method used

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  • Synchronization method of femtocell base station and femtocell base station using the method
  • Synchronization method of femtocell base station and femtocell base station using the method
  • Synchronization method of femtocell base station and femtocell base station using the method

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Embodiment Construction

[0039] In order to solve the problems of the prior art mentioned in the background art, the femtocell base station of the present invention realizes synchronization by itself, thereby reducing performance degradation due to asynchrony between users of the femtocell and users of the macrocell .

[0040] In the present invention, when the femtocell base station communicates with the user of the femtocell, it is synchronized without or minimizing the interference of the user of the macrocell. That is, the downlink start time of the femto cell base station is synchronized with the reception time from the macro cell base station, and the uplink start time of the terminal existing in the femto cell is adjusted to be similar to the time of the terminal in the macro cell .

[0041] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, when assigning symbols to constituent elements in each drawing, ...

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Abstract

The invention relates to a synchronization method of a femto cell base station and a femto cell base station using the method. More specifically, the present invention relates to introducing femtocells for indoor or shaded areas of existing cells. The femtocells receive preamble signals and use this as a reference to achieve downlink synchronization. Femtocell base stations send macrocell base stations The ranging signal, along with which the uplink synchronization signal is received, thereby ensuring the uplink synchronization of the terminal, whereby the inter-subcarrier can be maintained even if a different subcarrier or the same subcarrier of the same frequency band as the macro cell is used Orthogonality, and eliminate redundant signal interference. For this reason, the present invention is in the Orthogonal Frequency Division Multiple Access (OFDMA: Orthogonal Frequency Division Multiple Access) communication system of femtocell (Femtocell) in macrocell, when femtocell base station receives preamble signal from macrocell base station , the femtocell base station performs time synchronization with the preamble signal, and sends symbols to terminals belonging to the femtocell, thereby ensuring time synchronization of the femtocell base station.

Description

technical field [0001] The present invention relates to a method for synchronizing femtocell base stations and femtocell base stations using this method, and more specifically, to a method for synchronizing femtocell base stations and femtocell base stations using this method. Femto cells are connected indoors or in the shaded areas of existing cells. At the same time, the femto cell base station receives the preamble signal, which is used as a reference to achieve downlink synchronization. The femto cell base station sends ranging signals to the macro cell base station, and then receives uplink Link synchronization signal, thereby ensuring the uplink synchronization of the terminal, whereby the orthogonality between the subcarriers can be maintained even if different subcarriers or the same subcarriers of the same frequency band as the macro cell are used, and Eliminate unnecessary signal interference. Background technique [0002] Orthogonal Frequency Division Multiple Ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/155
CPCH04W56/0015H04L5/0007H04W56/0055H04W74/006H04W92/20
Inventor 金光淳尚暎晋
Owner WIRELESS ALLIANCE LLC
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