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公开(公告)号：US20190132022A1
公开(公告)日：2019-05-02
申请号：US16131388
申请日：2018-09-14
Inventor： Joon-Young JUNG , Tae-Kyoon KIM , Eun-Hee HYUN , Heung-Mook KIM
IPC: H04B1/525 , H04L5/14 , H04L5/00 , H04B17/345 , H04B10/516
Abstract: Disclosed herein are a method for simultaneously transmitting/receiving upstream and downstream signals using a remote PHY architecture and an apparatus for the same. The method determines whether to divide frequencies depending on whether signal interference occurs among multiple cable modems connected to a cable network, if it is determined to divide the frequencies, categorize the multiple cable modems into multiple groups so that signal interference occurs in each group, but signal interference does not occur between groups, set transmission bands for the multiple groups so that an upstream band and a downstream band of one group alternate with upstream bands and downstream bands of remaining groups by dividing the frequencies in accordance with a number of groups, and cancels, by a remote physical layer (PHY) device located at an optical network terminal of the cable network, self-interference signals for respective groups based on the transmission bands.
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公开(公告)号：US20190173487A1
公开(公告)日：2019-06-06
申请号：US16208732
申请日：2018-12-04
Inventor： Eun-Hee HYUN , Je-Won LEE , Heung-Mook KIM , Joon-Young JUNG , Tae-Kyoon KIM
CPC classification number: H03M7/3062 , H03M7/30 , H03M7/3066 , H03M7/3082 , H04L27/364 , H04L27/3854
Abstract: Disclosed herein are a method for transmitting and receiving compressed data and an apparatus therefor. According to the method for transmitting compressed data, a transmission apparatus for transmitting compressed data standardizes the value of an In-phase/Quadrature-phase (IQ) data sample to a preset type that is selected from among a positive number and a negative number, determines the sample type of the IQ data sample, the value of which is standardized to the preset type, based on a sample type determination rule, generates a compressed bit string based on the compression rule pertaining to the determined sample type, generates compressed data, including at least one of a reference bit corresponding to the sample type, the sign bit of the IQ data sample, and the compressed bit string, for each IQ data sample, and transmits the compressed data to a reception apparatus.
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公开(公告)号：US20180063559A1
公开(公告)日：2018-03-01
申请号：US15660741
申请日：2017-07-26
Inventor： Tae-Kyoon KIM , Yong-Seong CHO , Joon-Young JUNG , Nam-Ho HUR
IPC: H04N21/2385 , H04N21/472 , H04N21/6405 , H04N21/61
CPC classification number: H04N21/2385 , H04N21/2393 , H04N21/266 , H04N21/472 , H04N21/6118 , H04N21/6168 , H04N21/6405 , H04N21/6581
Abstract: Disclosed herein is technology for controlling transmission of a switched digital video service through which an operator management and control system for efficiently managing and controlling a switched digital video transmission system, which may improve utilization of frequency resources, may be simply constructed and managed. To this end, a method for controlling transmission of a switched digital video service includes configuring a multicast session based on information about a request to transmit a video, which is transmitted from a user end; forming and controlling a service flow to be transmitted through the multicast session; allocating and managing a frequency channel resource through which the service flow is to be transmitted; and sharing information about the frequency channel resource and allocation thereof with a switched digital video control module and managing and controlling the switched digital video control module.
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