NODE UNIT CAPABLE OF MEASURING AND COMPENSATING TRANSMISSION DELAY AND DISTRIBUTED ANTENNA SYSTEM INCLUDING THE SAME

    公开(公告)号:US20170367061A1

    公开(公告)日:2017-12-21

    申请号:US15540651

    申请日:2014-12-31

    Applicant: SOLiD, INC.

    Abstract: Provided is a node unit which is branch-connected to another communication node via a transport medium, the node unit comprising: a delay measurement unit which transmits a test signal for measuring a delay to an adjacent node unit of the branch-connected upper stage via the transport medium and detects a loopback signal to which the test signal is looped back via the adjacent node unit of the upper stage, thereby measuring an upper stage transmission delay between the adjacent node unit of the upper stage and the node unit; a delay summation unit which, when an adjacent node unit of the branch-connected lower stage exists, receives a lower stage transmission delay transmitted from the adjacent node unit of the lower stage, and calculates a summed transmission delay by summing the upper stage transmission delay and the lower stage transmission delay; and a control unit which transmits the summed transmission delay to the adjacent node unit of the upper stage.

    Distributed antenna system for time division duplex

    公开(公告)号:US09774438B2

    公开(公告)日:2017-09-26

    申请号:US15079880

    申请日:2016-03-24

    Applicant: SOLiD, INC.

    CPC classification number: H04L5/14 H04B1/52 H04B1/525 H04L5/1469

    Abstract: According to an example embodiment of the inventive concept, a master unit for time division duplex includes a passive signal distributor for outputting, to a second node, a downlink signal input through a first node, and outputting, to the first node, an uplink signal input through a third node, and a signal transceiver for transmitting, to a remote unit, the downlink signal input from the second node, and outputting, to the third node, an uplink amplification signal received from the remote unit.

    REMOTE APPARATUS OF DISTRIBUTED ANTENNA SYSTEM
    316.
    发明申请

    公开(公告)号:US20170222740A1

    公开(公告)日:2017-08-03

    申请号:US15501002

    申请日:2015-12-04

    Applicant: SOLiD, INC.

    Inventor: Youngju YOU

    CPC classification number: H04B17/16 H04B1/0475 H04B17/17

    Abstract: A remote apparatus includes: a plurality of sub amplification units amplifying radio frequency (RF) signals of different frequency bands, respectively; a test signal generation unit generating test signals of a frequency band for any one sub amplification unit among the plurality of sub amplification units; a conversion unit converting intermodulation (IM) signals generated in response to the test signals into a plurality of conversion IM signals by using a conversion signal of which a frequency is swept; and a control unit determining a degree of an intermodulation distortion by the any one sub amplification unit based on signal levels of the plurality of the conversion IM signals.

    DATA COMPRESSION DEVICE AND METHOD USING FLOATING POINT FORMAT

    公开(公告)号:US20170194986A1

    公开(公告)日:2017-07-06

    申请号:US15397921

    申请日:2017-01-04

    Applicant: SOLiD, INC.

    Abstract: A data compression device includes an analog to digital converter (ADC) configured to convert an analog signal into a digital signal including in-phase and quadrature components; and a compressor configured to generate a 28-bit fixed-point digital signal in which bits of the in-phase and quadrature components are alternately arranged, generate an exponent bit string by comparing n most significant bits of a data bit string excluding two sign bits in the 28-bit fixed-point digital signal with preset mapping data, wherein the exponent bit string includes 4 bits, generate a mantissa bit string composed of 14 bits corresponding to up to 14th bit from a bit next to the n most significant bits of the data bit string, and generate a 20-bit floating point digital signal by combining the two sign bits, the exponent bit string, and the mantissa bit string, wherein n is a natural number equal to or greater than 2 and equal to or less than 12.

    DISTRIBUTED ANTENNA SYSTEM
    318.
    发明申请

    公开(公告)号:US20170126362A1

    公开(公告)日:2017-05-04

    申请号:US15091912

    申请日:2016-04-06

    Applicant: SOLiD Inc.

    Inventor: Young Man CHO

    CPC classification number: H04L1/0077 H04B7/024 H04B17/309 H04L27/0004

    Abstract: A technology related to a distributed antenna system is disclosed. In an exemplary embodiment, a distributed antenna system may include a master unit and a plurality of remote units. The master unit may be interfaced with a wireless communications network and perform a bidirectional simultaneous digital radio frequency distribution of a wireless signal. The plurality of remote units may be each coupled to the master unit, and each perform a wireless transmission or reception of a split radio frequency signal to or from terminals located within a coverage. The master unit and the plurality of remote units may transmit or receive digital radio frequency signals in a wavelet transform domain. The master unit may determine whether the digital radio frequency signal, transmitted by each of the remote units, is normal, and merge the digital radio frequency signals.

    RELAY SYSTEM IN RING TOPOLOGY
    319.
    发明申请

    公开(公告)号:US20170111717A1

    公开(公告)日:2017-04-20

    申请号:US15391971

    申请日:2016-12-28

    Applicant: SOLID, INC.

    Abstract: A master unit configured to manage a plurality of remote units connected in a ring topology, the master unit comprising: a network management section configured to transmit at least one of a path-state monitoring control signal and a delay measurement control signal to the plurality of remote units in a first direction and a second direction which is a reverse direction of the first direction, and receives an acknowledgement signal in response to the at least one of a path-state monitoring control signal and a delay measurement control signal; and switching control means for transmitting a forward signal received from a base station in the first direction, and transmitting a switching control signal in the second direction when a defect is detected in any remote unit among the plurality of remote units by the network management section.

    Analog distributed antenna system for processing ethernet signal

    公开(公告)号:US09608847B2

    公开(公告)日:2017-03-28

    申请号:US15079391

    申请日:2016-03-24

    Applicant: SOLiD, INC.

    Inventor: Yeongshin Yeo

    CPC classification number: H04L25/20 H04L5/0098

    Abstract: A device included in an analog distributed antenna system includes a first analog signal processing unit for receiving an analog communication signal, a first modulation/demodulation unit for converting a digital Ethernet signal received from an Ethernet network into an analog Ethernet signal, a multiplexing unit for multiplexing the analog communication signal signal-processed by the analog signal processing unit and the analog Ethernet signal converted by the modulation/demodulation unit, and a transmission unit for transmitting, to other devices included in the analog distributed antenna system, the analog communication signal and the analog Ethernet signal, which are multiplexed by the multiplexing unit.

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