Abstract:
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The present invention is a method by which a base station transmits a signal in a wireless communication system for efficiently performing an initial access procedure of a terminal, the method comprising the steps of: generating the synchronization signal on a basis of subcarrier spacing used in the synchronization signal; and transmitting the synchronization signal to the terminal.
Abstract:
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method of receiving uplink control information in a communication system. The method includes identifying a resource for receiving the uplink control information on a first uplink control channel from a terminal, transmitting first information associated with the resource to the terminal, transmitting second information associated with the resource to the terminal, and receiving the uplink control information on the uplink control channel based on the first information and the second information from the terminal.
Abstract:
The present invention defines a method for controlling uplink transmission power of a terminal in a communication system which is operated by combining heterogeneous systems. Specifically, the present invention defines a method for selectively applying a power control command in order to control uplink power of a terminal in a communication system which is operated by combining an LTE/LTE-A system with a system which applies a new radio access technology, and a method for differently operating power control units depending on whether beam sweeping is applied or not. Such methods efficiently control transmission power of a terminal, and lower the generation of uplink interference signals, thereby improving system efficiency.
Abstract:
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail security and safety services. In particular, the present disclosure relates to a wireless communication system and, more particularly, to a method and device for transmitting or receiving a synchronization signal, a physical broadcast channel, a control signal, and a data signal in a system supporting transmission and reception through a narrowband channel of about 180 kHz. Specifically, the present disclosure defines an in-band mode operation of an LTE-lite terminal in order to avoid collision with a conventional LTE terminal, and provides a method for using a reference signal, a method for periodically puncturing a specific slot, and so on.
Abstract:
A data transmission method and an apparatus in a network supporting coordinated multipoint transmission are provided. The method includes transmitting candidate sets of initial state information used to generate Demodulation Reference Signal (DMRS) scrambling sequences for the transmission points to the UE, and transmitting an indication corresponding to at least one candidate set of initial state information respectively associated with at least one transmission point to the UE, wherein the initial state information is used by the UE to generate DMRS scrambling sequences.
Abstract:
A method for transmitting and receiving a signal in a terminal of a mobile communication system, according to one embodiment of the present specification, comprises the steps of: receiving information of another terminal from the other terminal; transmitting, to a base station, a message requesting allocation of an identifier for the other terminal on the basis of the received information of the other terminal; and receiving, from the base station, the message including the identifier allocated for the other terminal. The provided present invention, according to one embodiment of the present specification, allows only the arbitrary receiver to access the base station and receive data therefrom when a plurality of densely located receivers are neighboring each other. At this point, the other receivers can selectively receive a data stream transmitted to each terminal from data channels received by the arbitrary receiver that accesses the base station. To this end, only the arbitrary terminal accessing at least the base station is enabled to allow feedback of the channel.
Abstract:
The present invention relates to a method for a terminal requesting scheduling to transmit uplink data in a mobile communication system. More specifically, the present invention, in a system that aggregates carriers between different base stations, defines a process and a method for scheduling requests so that a terminal can transmit “scheduling request” control information to each base station, thereby enabling effective transmission of dynamic scheduling and uplink data.
Abstract:
The present invention relates to a method and an apparatus for communication between a terminal and a base station in a wireless communication system. The communication method by a base station according to an embodiment of the present invention may comprise the steps of: transferring, to a terminal connected to the base station and at least one surrounding second base station, information on connection between the second base station and the terminal; transmitting a command for searching the second base station to the terminal; and transmitting a command for transferring a base station connection signal to the terminal. According to an embodiment of the present invention, by a method which enables a terminal to additionally access another base station in a state wherein the terminal is already connected to the base station, the terminal can rapidly search for multiple base stations. Further, the embodiment of the present invention can support access of the terminal to multiple base stations. In addition, on the basis of the method, the terminal can transmit and receive data from multiple base stations.
Abstract:
An apparatus and a method of measuring a reference signal for efficient downlink transmission in a mobile communication system are provided. The system includes plural base stations, each having a plurality of antennas distributed in the service area thereof based on a Distributed Antenna System (DAS). A method for a base station to notify a terminal of reference signal measurement information in a mobile communication system comprises determining whether the terminal is in a Rank Indicator/Precoding Matrix Indicator (RI/PMI) disabled mode, selecting, when the terminal is in the RI/PMI disabled mode, the reference signal to be measured by the terminal between a Cell-specific Reference Signal (CRS) and a Channel Status Information Reference Signal (CSI-RS), notifying the terminal of the reference signal measurement information with the selection result, and receiving channel information generated based on the reference signal measurement information from the terminal.
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.