Abstract:
A discovery signal transmission/reception method and an apparatus for improving energy efficiency of the system are provided. The discovery signal transmission method of a base station in a mobile communication system according to the present disclosure includes acquiring a discovery signal configuration of a neighbor cell, transmitting the discovery signal configuration to a terminal, receiving a measurement report including a result of measurement on a discovery signal of the neighbor from the terminal, the measurement being performed based on the discovery signal configuration, and determining whether to make a handover decision for the terminal based on the measurement report. The discovery signal transmission/reception method of the present disclosure is advantageous in improving energy efficiency of a mobile communication system.
Abstract:
A method and an apparatus for transmitting/receiving channel state information for use in multi-antenna system are provided. A signal communication method of a base station having a plurality of antennas in a wireless communication system includes determining antenna ports of first and second directions based on directions of the plurality of antennas, allocating channel measurement resources for the respective antenna ports to a terminal, transmitting a feedback configuration to the terminal according to the channel measurement resources, and receiving feedback information from the terminal based on the channel measurement resource and the feedback configuration. The signal transmission/reception method and apparatus are advantageous in transmitting/receiving channel state information efficiently in the system using a plurality of antennas.
Abstract:
The present disclosure relates to a communication technique and a system thereof for fusing, with IoT technology, a 5G communication system for supporting a higher data transmission rate than a beyond 4G system. The present disclosure may be applied to intelligent services (such as smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail business, security and safety related services, etc.). The present disclosure relates to a method for receiving downlink data of a terminal in a wireless communication system, and suggests a method and an apparatus for receiving downlink data, the method comprising: a step for checking a transmission parameter regarding data being transmitted from an interference cell; a step for determining, on the basis of the transmission parameter, whether or not an interference signal exists; a step for determining, on the basis of any one of the transmission parameter and the determination on whether or not an interference signal exists, whether or not network assisted interference cancellation and suppression (NAICS) technology is applied; and a step for decoding the downlink data on the basis of the determination on whether or not the NAICS technology is applied.
Abstract:
A method for transmitting and receiving a signal in a base station of a mobile communication system according to an embodiment of the present specification comprises the steps of: generating power control information for device to device (D2D) communication for a terminal; and transmitting, to the terminal, a message including an indicator indicative of a power control mode of the terminal in accordance with the generated power control information. In accordance with a method for controlling transmit power of a terminal and a method for selecting a transmit resource in a mobile communication system provided in an embodiment of the present specification, mutual interference between the device to device communication and cellular communication can be reduced, and the communication efficiency can be improved.
Abstract:
The present invention relates to a method and an apparatus for transmitting interference related control information in order to improve reception performance of a UE which receives a downlink signal, in a cellular mobile communication system based on an Long Term Evolution-Advanced (LTE-A) system. A communication method of a UE according to an embodiment of the present invention includes receiving information on a resource allocation unit of an interference signal from an eNB; performing blind detection using information on the resource allocation unit of the interference signal; performing error-correcting coding using a transmission parameter for interference and a result obtained by the blind detection; and decoding reception data. According to an embodiment of the present invention, a reception performance of the UE can be improved through interference cancellation and suppression.
Abstract:
A method for transmitting control information by a base station in a wireless communication system is provided. The method includes determining a precoder to be applied to a resource and a Demodulation Reference Signal (DMRS) port, the resource being used to transmit the control information, and the DMRS port corresponding to the resource and being used to transmit a DMRS, precoding the resource and the DMRS port by using the determined precoder, and transmitting the control information and the DMRS to a user equipment.
Abstract:
A method and an apparatus are provided for a data transmission/reception in a terminal in a CoMP system is provided. One or more valid subframes are determined for updating feedback information. The feedback information is updated at each of the valid subframes. A feedback information scheduling signal is received at a predetermined subframe. Feedback information updated at a most recent valid subframe, from among previous subframes, is transmitted according to the feedback information scheduling signal.
Abstract:
A channel estimation method and apparatus are provided for a terminal in a cellular mobile communication system including a plurality of base stations. The method includes maintaining a maximum number of CSI processes supported by the UE; receiving CSI process report information; determining a number of CSI to be updated based on the maximum number of CSI processes supported by the UE; generating at least one CSI report based on the determined number of CSI to be updated; and transmitting the at least one CIS report to an evolved Node B (eNB).
Abstract:
A Channel State Information (CSI) transmission/reception method and an apparatus for transmitting/receiving CSI efficiently in a Coordinated Multi-Point (CoMP) communication system are provided. The CSI transmission method of a terminal for receiving Joint Transmission (JT) from a first Transmission Point (TP) and a second TP includes receiving a first CSI Reference Signal (CSI-RS) corresponding to the first TP, receiving a second CSI-RS corresponding to the second TP, generating an aggregated CSI corresponding to the first and second CSI-RSs, and transmitting the aggregated CSI, wherein generating an aggregated CSI comprising creating the aggregated CSI with a transmission timing of the aggregated CSI. The CSI transmission/reception method and apparatus is capable of transmission CSI efficiently in the CoMP system.
Abstract:
A Channel State Information (CSI) feedback method and apparatus is provided for transmitting, at a base station, the CSIs for plural transmit antennas with a limited amount resource and receiving, at a mobile station, the CSIs efficiently in a massive Multiple Input Multiple Output (MIMO) system operating in the Frequency Division Duplex (FDD) mode.