Abstract:
Apparatuses (including base stations and terminals), systems, and methods for supporting both wideband and narrowband communications are described. In one aspect, a base station supporting first type terminals operating on a first bandwidth and second type terminals operating on a second bandwidth is described, having an information formatter, a transceiver, and a controller. The information formatter generates a Low-end Master Information Block (L-MIB) and a Low-end System Information Block (L-SIB), which are transmitted by the transceiver to first type and second type terminals. The L-MIB includes control information on an L-subframe configuration for supporting a second type terminal and a sub-band configuration of the L-subframe, while the L-SIB includes information on downlink reception and uplink transmission of the second type terminal. When the base station receives a Random Access Channel (RACH) preamble request from one of the terminals, the base station performs the random access procedure.
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 translation:提供了一种在移动通信系统中测量用于有效下行链路传输的参考信号的装置和方法。 该系统包括多个基站,每个基站具有基于分布式天线系统(DAS)分布在其服务区域中的多个天线。 一种用于基站在移动通信系统中通知终端参考信号测量信息的方法,包括:确定终端是否处于秩指示/预编码矩阵指示符(RI / PMI)禁用模式,当终端处于 RI / PMI禁用模式,由小区特定参考信号(CRS)和信道状态信息参考信号(CSI-RS)之间的终端要测量的参考信号,通过选择通知终端参考信号测量信息 结果以及基于来自终端的参考信号测量信息生成的信道信息。
Abstract:
A method for transmitting a physical channel in a Time Division Duplex (TDD) communication system capable of carrier aggregation is provided for supporting aggregation of carriers having different TDD configurations. The communication method of a terminal in a TDD radio communication system accomplishing broadband through carrier aggregation of primary and secondary cells, of which aggregated carriers have different TDD Uplink-Downlink (UL-DL) configurations, includes receiving Physical Downlink Shared Channel (PDSCH) through the secondary cell, and transmitting acknowledgement information corresponding to the PDSCH to a base station, where acknowledgement information is transmitted on a Physical Uplink Control CHannel (PUCCH) of the primary cell.
Abstract:
A method and an apparatus for transmitting and receiving signals modulated with 256 Quadrature Amplitude Modulation (256QAM) for use in a mobile communication system are provided. The method includes receiving a first signal from a terminal, determining a modulation application criterion for data communication with the terminal based on the first signal, receiving a second signal including an index from the terminal, and determining a modulation scheme to be applied to at least one of the signals communicating with the terminal based on the modulation application criterion and the received index.
Abstract:
A system access method of a narrowband terminal is provided for supporting both wideband and narrowband terminals in a cellular radio communication system. The method includes broadcasting a Shared CHannel (SCH) for a terminal to acquire system synchronization; transmitting a Low-end Master Information Block (L-MIB) including control information on an L-subframe configuration for supporting a second type terminal and a sub-band configuration of the L-subframe; transmitting a Low-end System Information Block (L-SIB) including information on downlink reception and uplink transmission of the second type terminal; and performing a random access procedure, when an attach request is received from one of the first type terminals and the second type terminals.
Abstract:
The disclosure relates to a 5G or 6G communication system for supporting higher data rates. The disclosure relates to a method and apparatus capable of transmitting and receiving uplink signals for coverage enhancement in a wireless communication system. The method comprises: receiving, via a PDCCH, DCI scheduling a PUSCH transmission, wherein the DCI includes first information associated with a PUSCH transmission waveform; determining, based on the first information, whether the PUSCH transmission waveform is a DFT-s-OFDM or the PUSCH transmission waveform is changed from a recent PUSCH transmission waveform; identifying, based on a processing time parameter; determining whether to transmit the PUSCH transmission based on the PUSCH preparation time; and transmitting the PUSCH transmission in response to determining to transmit the PUSCH transmission.
Abstract:
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. This disclosure relates to methods and systems for the network to configure the UE with CSI report sub-configurations with the CSI reporting quantity set to “cri-RI-CQI.” The method comprises: receiving, from a base station, configuration information on a CSI reporting, wherein the configuration information includes one or more sub-configurations and a sub-configuration includes a port subset indicator; identifying one or more CSI-RS ports for the sub-configuration based on a plurality of CSI-RS ports for a channel measurement associated with the CSI reporting and the port subset indicator; obtaining CSI based on the one or more CSI-RS ports; and transmitting, to the base station, the CSI reporting including the CSI.
Abstract:
The present invention relates to a communication technique which combines, with IoT technology, a 5G communication system for supporting higher data transmission rates than 4G systems, and a system therefor. The present invention can be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, healthcare, digital education, retail businesses, security- and safety-related services, etc.) on the basis of 5G communication technology and IoT-related technology. Disclosed are a method and device for reducing the power consumption of a base station.
Abstract:
The disclosure relates to a communication technique for combining an IoT technology with a 5G communication system for supporting a higher data transmission rate beyond a 4G system, and a system therefor. The disclosure may be applied to intelligent services (for example, smart homes, smart buildings, smart cities, smart cars or connected cars, health care, digital education, retail businesses, security and safety related services, and the like) based on 5G communication technologies and IoT-related technologies. The disclosure provides a method for improving the coverage of an uplink channel for uplink transmission.
Abstract:
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. One embodiment of the present disclosure can provide a transmission/reception method and apparatus using a beam in an integrated access and backhaul (IAB) node.