CROSSTALK REDUCING CENTRAL OFFICE FOR SUBSCRIBER NETWORK TO WHICH G.hn TECHNOLOGY IS APPLIED AND CROSSTALK REDUCING METHOD THEREFOR

摘要

The present invention relates to a crosstalk reducing central office (CO) for a subscriber network to which G.hn technology is applied, and a crosstalk reducing method therefor, which are capable of efficiently reducing a crosstalk generated in a telephone line bundle according to an indoor wiring environment, and, even when the crosstalk reducing CO is used with a CO using a different synchronization method, reducing a crosstalk therebetween, when a high speed communication with a communication speed of 1 Gpbs or more is to be provided by applying G.hn technology for a home network to a telephone line subscriber network. According to the present invention, since a network time setting unit capable of verifying a correct time is provided in a CO, transmission and reception synchronism with a terminal is maintained based on a correct time acquired through the network time setting unit, thereby reducing a crosstalk according to a transmission and reception timing error. In addition, a synchronism phase (synchronizing signal occurrence time) is actively adjusted based on a crosstalk degree through a current communication state analysis, so that a separate synchronization clock generation device is not necessary, or a separate connection configuration is not necessary for a clock transfer between a plurality of COs. Even when the crosstalk reducing CO according to the present invention is mixed with a CO using a different synchronization method, it is possible to reduce a front end crosstalk, thereby improving communication performance. The crosstalk reducing method for a subscriber network to which G.hn technology is applied comprises the following steps. A CO having a plurality of ports, which is connected to a variety of customer premises equipment (CPE) through an indoor line formed in a bundle, calculates current visual information through a time server connected thereto through a network. The CO performs synchronization with a terminal based on the calculated current visual information. The CO calculates synchronism information for adjusting a phase by checking a crosstalk occurrence section based on crosstalk reporting information for each port. The CO controls a synchronization time with the terminal by using the calculated synchronism information. The calculating of the synchronism information comprises the steps of: verifying the crosstalk occurrence section to adjust the synchronization time with the terminal by using synchronism information generated in a first time unit by checking the crosstalk occurrence section; and adjusting the synchronization time in a second time unit shorter than the first time unit by checking a remaining crosstalk occurrence section.;COPYRIGHT KIPO 2016