Abstract: A method and apparatus for transmitting and receiving channel status information in a mobile communication system including a distributed antenna system. The channel status information feedback method of the present invention includes transmitting, to a base station, received signal strengths of reference signals transmitted through at least one of antennas distributed in a service area of the base station and transmitting, to a base station, channel status information corresponding to at least one antenna selected by the base station.

Abstract: A control information interpretation method of a terminal and a base station in a mobile communication system, and a terminal and a base station concerning the same, respectively, are provided. The control information interpretation method of a terminal includes receiving, by the terminal, control information including transport block information and antenna port related information; identifying whether a codeword 0 is enabled and a codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabled based on the transport block information; and interpreting the antenna port related information according to a result of the identification.

Abstract: An organic light-emitting device includes a first electrode; a second electrode; and an organic layer between the first electrode and the first electrode and including an emission layer (EML); a hole transport region between including an electron blocking layer (EBL) and at least one selected from a hole injection layer (HIL), a hole transport layer (HTL), and a buffer layer; and an electron transport region and including a hole blocking layer (HBL) and at least one selected from an electron transport layer and electron injection layer (EIL). A triplet energy of a material for the electron blocking layer (EBL T1), a triplet energy of a material for the hole blocking layer (HBL T1), and a triplet energy of a host in the emission layer (Host T1) satisfy Equation (1) and Equation (2): EBL T1?HBL T1?Host T1??(1) EBL T1?HBL T1?0.2 eV??(2).

Abstract: An apparatus and method for transmitting and receiving a signal in a Distributed Antenna System (DAS) is provided. A method for determining an initial state in a DAS includes receiving a value through high-level signalling and determining an initial state based on the value, in which the value includes a value in which is set an initial state of a scrambling sequence, which differs according to a transmission point.

Abstract: A method and user equipment for transmitting channel state information (CSI) are provided.

Abstract: A control information interpretation method of a terminal and a base station in a mobile communication system, and a terminal and a base station concerning the same, respectively, are provided. The control information interpretation method of a terminal includes receiving, by the terminal, control information including transport block information and antenna port related information; identifying whether a codeword 0 is enabled and a codeword 1 is disabled, or both the codeword 0 and the codeword 1 are enabled based on the transport block information; and interpreting the antenna port related information according to a result of the identification.

Abstract: Disclosed is a method for transmitting a sounding reference signal (SRS) in a cooperative communication system. The method comprises receiving, from a macro base station, SRS resource information indicating transmission resources of an SRS to be transmitted by a user equipment (UE); transmitting the SRS and uplink data based on a UE-specific SRS subframe configuration included in the SRS resource information when the SRS resource information includes the UE-specific SRS subframe configuration information; and transmitting the SRS and the uplink data based on a pre-stored cell-specific SRS subframe configuration when the SRS resource information does not include the UE-specific SRS subframe configuration information. When a destination of the SRS to be transmitted by the UE is selected as a base station related to the macro base station, the SRS resource information includes the UE-specific SRS subframe configuration information of the base station selected as the destination of the SRS.

Abstract: Methods and apparatus are provided for transmitting a reference signal by a base station in a mobile communication system. The method includes generating, at the base station, information for a non zero transmission power reference signal including at least one resource element; generating, at the base station, bitmap information indicating a zero transmission power reference signal; and transmitting, at the base station, the information for the non zero transmission power reference signal and the bitmap information to a terminal.

Abstract: A method for wireless communication by a terminal, a method for wireless communication by a base station, the terminal, and the base station, are provided. The method for wireless communication by the terminal includes receiving first information comprising a muting subframe interval, a subframe offset, and a muting position of a resource element in a resource block, checking presence of a data in a subframe, determining the resource element to be muted in the subframe based on the muting subframe interval, the subframe offset, and the muting position, if the data is present, and receiving the data on a physical downlink shared channel (PDSCH) based on the result of the determining step.

Abstract: A method and an apparatus for obtaining a small cell identifier in a wireless communication system having a hierarchical cell structure are provided. The method includes obtaining a small cell identifier of a terminal in a wireless communication system of a hierarchical cell structure, transmitting resource information allocated for a Random Access Channel (RACH) of a terminal to a small base station, receiving state information regarding the RACH of the terminal from the small base station, determining at least one small base station adjacent to the terminal using the state information regarding the RACH, and transmitting cell IDentifier (ID) information of the determined small base station to the terminal.

Abstract: Disclosed are: a communication technique for fusing, with IoT technology, a 5G communication system for supporting a data transmission rate higher than that of a 4 G system and subsequent systems; and a system thereof. The present disclosure can be applied to an intelligent service (for example, smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety-related service and the like) based on 5G communication technology and IoT related technology. The present disclosure presents a method by which a base station determines the approximate location of a terminal on the basis of a reception power report, and sets a codebook subset on the basis of the approximate location of the terminal so as to reduce a channel state report burden.

Abstract: An apparatus and method for transmitting reference signals in a communication system are provided. The method includes transmitting common reference signals of a first type from a transmitter to a plurality of receivers; transmitting receiver-specific reference signals of a second type from a plurality of distributed ports to a subset of the plurality of receivers; wherein the common reference signals of the first type and the receiver-specific reference signals of the second type are allocated to different resources from one another, and wherein the communication system includes the transmitter and the plurality of receivers and the transmitter uses a plurality of central ports and the plurality of distributed ports to transmit to the plurality of receivers.

Abstract: An organic light-emitting device includes a first electrode; a second electrode; and an organic layer between the first electrode and the first electrode and including an emission layer (EML); a hole transport region between including an electron blocking layer (EBL) and at least one selected from a hole injection layer (HIL), a hole transport layer (HTL), and a buffer layer; and an electron transport region and including a hole blocking layer (HBL) and at least one selected from an electron transport layer and electron injection layer (EIL). A triplet energy of a material for the electron blocking layer (EBL T1), a triplet energy of a material for the hole blocking layer (HBL T1), and a triplet energy of a host in the emission layer (Host T1) satisfy Equation (1) and Equation (2): EBL T1>HBL T1?Host T1??(1) EBL T1?HBL T1?0.2 eV??(2).

Abstract: A method and user equipment for transmitting channel state information (CSI) are provided. The method includes identifying a first CSI configuration with a first channel measurement information, a first interference measurement information, and a first information for a period and an offset; identifying a second CSI configuration with a second channel measurement information, a second interference measurement information, and a second information for a period and an offset; generating a first CSI based on the first channel measurement information and the first interference measurement information; generating a second CSI based on the second channel measurement information and the second interference measurement information; transmitting the first CSI for the first CSI configuration based on the first information; and transmitting the second CSI for the second CSI configuration based on the second information.

Abstract: A method and user equipment for transmitting channel state information (CSI) are provided. The method includes identifying a plurality of CSI configurations, each CSI configuration including channel measurement information, interference measurement information, an index for the each CSI configuration, and information for a period and an offset; and reporting a CSI for a CSI configuration among the plurality of CSI configurations based on a CSI report type and an index for the CSI configuration, in case of collision between CSI reports for the plurality of CSI configurations.

Abstract: An organic light-emitting device includes a first electrode, a second electrode facing the first electrode, and an organic layer disposed between the first electrode and the second electrode and including an emission layer; an electron transport region disposed between the second electrode and the emission layer; a mixed layer disposed between the emission layer and the electron transport region and including a first material and a second material; wherein the first material and the second material are pyrrolidine-based compounds; and triplet energy EgT1 of at least one selected from the first material and the second material is 2.2 eV or greater.

Abstract: An apparatus and a method for transmitting/receiving downlink data channel signal transmission information in a cellular radio communication system using a Cooperative Multi-Point (CoMP) scheme are provided. In the downlink data channel signal transmission information transmission method, a Base Station (BS) transmits downlink data channel signal transmission information including information related to Resource Elements (REs) scheduled for a downlink data channel signal transmission to a User Equipment (UE), and transmits downlink data channel signal non-transmission information including information related to REs through which a downlink data channel signal is not transmitted among the REs scheduled for the downlink data channel signal transmission to the UE.

Abstract: An organometallic complex represented by Formula 1 below and an organic light-emitting device including the same: Formula 1 is as defined in the specification.

Abstract: An organic light-emitting device and a flat panel display, the device including an anode; a cathode; and an organic layer therebetween, the organic layer including an EML, the EML including a first host and a second host that are different from one another, a hole transport region between the anode and the EML, the hole transport region including at least one of a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, or an electron blocking layer (EBL), an electron transport region between the EML and the cathode, the electron transport region including at least one of a hole blocking layer (HBL), an electron transport layer (ETL), or an electron injection layer (EIL), and an intermediate layer between the EML and the electron transport region; wherein the intermediate layer includes a compound having an electron affinity of more than 0 eV and less than 2.5 eV.

Abstract: The present invention relates to a method and device for transmitting and receiving CSI (Channel State Information). A CSI transmission method at a CoMP (Coordinated Multi-Point) device includes steps of receiving a CSI-RS (Reference Signal) from a plurality of transmission points, acquiring an optimal phase difference value causing an optimal channel quality between the plurality of transmission points, based on the CSI-RS, acquiring a CQI (Channel Quality Indicator), based on the optimal phase difference value, and transmitting the CSI including the CQI. According to an embodiment of the present invention, efficient CSI transmission/reception method and device can be provided in a CoMP system.