Abstract: An apparatus and method for detecting a cable fault which simultaneously apply a plurality of measurement frequencies mutually orthogonal to a cable and estimate reflection coefficients at the measurement frequencies using filters for filtering only the respective measurement frequencies to reduce a time taken to detect a cable fault.

Abstract: An apparatus for efficiently and simply measuring an error vector magnitude (EVM) of a physical hybrid automatic repeat request (ARQ) indicator channel (PHICH) in a long term evolution (LTE) system. The apparatus includes an overall PHICH group data extraction unit configured to extract all PHICH group data from a received signal in a first subframe, an overall PHICH group analysis unit configured to detect orthogonal sequences and acknowledgement/negative acknowledgement (ACK/NACK) bits used in respective PHICH groups by analyzing all resources of the extracted PHICH group data, an ideal PHICH group sequence generation unit configured to generate an ideal PHICH group sequence using the detected ACK/NACK bits and orthogonal sequences, and an EVM measurement unit configured to measure an EVM of a PHICH using the ideal PHICH group sequence and the received signal.

Abstract: Provided is a long term evolution (LTE) femtocell based content service system and a driving method thereof, which include user equipment (UE) connected to an evolved packet core (EPC) network that is a core network through routes, that is, a radio network subsystem (RNS) and a home eNode subsystem (HeNS) having a femtocell and a content service server connected to the EPC network and configured to receive system information including PCI, U_DL BW, Cell ID, TAC, HeNB Name and SNR, and query data from the user equipment (UE), retrieve corresponding content with reference to the received system information and query data, and provide the corresponding content to the user equipment (UE).

Abstract: Provided is a method of controlling an uplink noise level in a multi-radio unit (RU) environment in which each RU measures an ordinary noise level using a power monitoring function thereof when there is no user traffic and then controls an uplink noise level based on the ordinary noise level.

Abstract: A calibration method for a channel simulator is applied to a large-capacity channel simulator having the interfaces of P base stations and Q terminals so that path loss calibration for P×Q paths is more rapidly and easily performed.

Abstract: Provided is a media access control processing unit (MAC) sharing method applied to a fifth generation (5G), which is a next generation, mobile communication system and making it possible to efficiently share a plurality of MACs so as to efficiently distribute and process traffic of user equipment (UE).

Abstract: A method of controlling power of a physical layer device of a base station in a mobile communication system which is applied to a fifth generation (5G), that is the next generation, mobile communication system and makes it possible to efficiently control the power of physical layer devices managing each beam spot, such as a radio frequency (RF) module and a modem, according to the number of pieces of user equipment (UE) or an amount of traffic processed by the beam spot. The method is applied to a mobile communication system including a plurality of media access control processing units (MACs) corresponding to a plurality of modems on a one-to-one basis and the plurality of modems each connected with one or more RF modules covering beam spots dividing a base station cell.

Abstract: Provided is a system for testing mobile handover which makes it possible to test a handover operation on a mobile side by providing an actual base station with a radio wave environment for causing mobile devices to move. The system is intended to test whether or not a handover operation of a mobile present in the service areas of at least three base stations is performed without interrupting service while the mobile moves from the service area of a currently connected base station to another spot.

Abstract: An apparatus and method for detecting a cable fault which simultaneously apply a plurality of measurement frequencies mutually orthogonal to a cable and estimate reflection coefficients at the measurement frequencies using filters for filtering only the respective measurement frequencies to reduce a time taken to detect a cable fault.

Abstract: A resource allocation algorithm and operation procedure for user equipment (UE) to efficiently report cell global identity (CGI) information to an evolved node base station (eNB) in an automatic neighbor relation (ANR) operation procedure in a wireless communication system. According to an operating method of an eNB for CGI information reporting in a wireless communication system, a serving eNB receives a CGI information report and perform an ANR operation to maintain service quality through effective handover of UE at the edge of the service area of the serving eNB. When there is uplink/downlink data, the serving eNB stops data allocation to the UE and requests measurement reports (MRs) of neighbor eNBs, and the UE can be switched to a discontinuous reception (DRX) state during a DRX-inactivity time. Accordingly, it is possible to ensure decoding of a broadcast channel (BCH) of a neighbor cell and report CGI information.

Abstract: A method of controlling power of a physical layer device of a base station in a mobile communication system which is applied to a fifth generation (5G), that is the next generation, mobile communication system and makes it possible to efficiently control the power of physical layer devices managing each beam spot, such as a radio frequency (RF) module and a modem, according to the number of pieces of user equipment (UE) or an amount of traffic processed by the beam spot. The method is applied to a mobile communication system including a plurality of media access control processing units (MACs) corresponding to a plurality of modems on a one-to-one basis and the plurality of modems each connected with one or more RF modules covering beam spots dividing a base station cell.

Abstract: A method of adjusting the coverage of a small cell for efficient use of cell resources in which the position of user equipment (UE) in the small cell is estimated using timing advance information of the UE, and the coverage is adjusted in consideration of a load state of the cell and a channel state of the UE.

Abstract: Provided is a media access control processing unit (MAC) sharing method applied to a fifth generation (5G), which is a next generation, mobile communication system and making it possible to efficiently share a plurality of MACs so as to efficiently distribute and process traffic of user equipment (UE).

Abstract: A method of adjusting the coverage of a small cell for efficient use of cell resources in which the position of user equipment (UE) in the small cell is estimated using timing advance information of the UE, and the coverage is adjusted in consideration of a load state of the cell and a channel state of the UE.

Abstract: An apparatus for efficiently and simply measuring an error vector magnitude (EVM) of a physical hybrid automatic repeat request (ARQ) indicator channel (PHICH) in a long term evolution (LTE) system. The apparatus includes an overall PHICH group data extraction unit configured to extract all PHICH group data from a received signal in a first subframe, an overall PHICH group analysis unit configured to detect orthogonal sequences and acknowledgement/negative acknowledgement (ACK/NACK) bits used in respective PHICH groups by analyzing all resources of the extracted PHICH group data, an ideal PHICH group sequence generation unit configured to generate an ideal PHICH group sequence using the detected ACK/NACK bits and orthogonal sequences, and an EVM measurement unit configured to measure an EVM of a PHICH using the ideal PHICH group sequence and the received signal.

Abstract: Provided is a method of controlling an uplink noise level in a multi-radio unit (RU) environment in which each RU measures an ordinary noise level using a power monitoring function thereof when there is no user traffic and then controls an uplink noise level based on the ordinary noise level.

Abstract: A method of offloading wireless data in a core network using a femtocell which can reduce a traffic load of a mobile communication network and maximize convenience of a user by determining to offload the wireless data passing through the core network onto a local network according to whether the data is real-time data is provided.

Abstract: A method of offloading wireless data in a core network using a femtocell which can reduce a traffic load of a mobile communication network and maximize convenience of a user by determining to offload the wireless data passing through the core network onto a local network according to whether the data is real-time data is provided.

Abstract: A method of switching a connection to a femtocell and a WiFi access point (AP) in software defined networking (SDN) capable of minimizing inconvenience of use by automatically switching a connection to a mobile communication network including the femtocell and a WiFi network connected to the SDN without disconnection of a data service in a state that a user does not recognize is provided.

Abstract: A method of measuring a call delay time by synchronizing times of a replaying part and a recording part in a call delay time measuring device using an interrupting hardware method. The method includes reading an original WAV file when a replaying CPU receives a command, waiting for writing to a DAC buffer of a replaying CODEC, transferring a signal of recording-ready to a recording CPU, generating a recording WAV file by the recording CPU, waiting for reading from an ADC buffer of a recording CODEC, transferring a signal of complete recording-ready to the replaying CPU, recording the original WAV file, replaying the original WAV file and simultaneously transferring a signal of recording-start to the recording CPU, and reading audio data from the ADC buffer of the recording part by the recording CPU and recording the audio data to the recording WAV file.