Abstract:
A random access method and an apparatus of a terminal for performing random access procedure to multiple base stations in parallel in a Long Term Evolution (LTE) system supporting dual connectivity are provided. The method includes determining whether a first preamble transmission to a first cell of a first base station is overlapped with a second preamble transmission to a second cell of a second base station in a time domain, determining, when the first preamble transmission is overlapped with the second preamble transmission in the time domain, whether a sum of transmit powers calculated for the first and second preamble transmissions is greater than a maximum allowed transmit power of the terminal, and controlling, when the sum of the first and second preamble transmit powers is greater than the maximum allowed transmit power, the transmit power calculated for the second preamble transmission.
Abstract:
A method and an apparatus for transmitting uplink/downlink data on time division duplexing (TDD) carriers are provided. The method includes transmitting to a base station in a primary cell (PCell) and a secondary cell (SCell), a TDD uplink (UL)/downlink (DL) configuration of the PCell having a DL subframe super-set or UL subset that are common in the SCell and the PCell and a TDD UL-DL configuration differing from each other, receiving data at a first subframe in the SCell, and transmitting, when a UL subframe set of the SCell is a subset of a UL subframe of the PCell, a feedback corresponding to the data at a subframe predefined in association with the first subframe in the PCell according to the TDD UL-DL configuration of the SCell. The method supports both the self-scheduling and cross-carrier scheduling of the UE using carriers of different TDD configurations.
Abstract:
A method of defining physical channel transmit/receiving timings and resource allocation is provided for use in a Time Division Duplex (TDD) communication system supporting carrier aggregation. A method for receiving, at a base station, a Hybrid Automatic Repeat Request (HARQ) acknowledgement from a terminal in a Time Division Duplex (TDD) system supporting carrier aggregation of a primary cell and at least one secondary cell includes transmitting a downlink physical channel through one of the primary and secondary cells, receiving the HARQ acknowledgement corresponding to the downlink physical channel of the primary cell at a first timing predetermined for the primary cell, and receiving the HARQ acknowledgement corresponding to the downlink physical channel of the secondary cell at second timing, wherein the second timing is determined according to the first timing.
Abstract:
A method of transmitting channel information by a User Equipment (UE) when an uplink sub-frame is used for downlink transmission in a communication system using a dynamic Time Division Duplex (TDD) UpLink-DownLink (UL-DL) configuration is provided. The method includes receiving reconfiguration information for reconfiguration of TDD uplink and downlink from an evolved Node B (eNB), measuring interference in a first sub-frame changed from an uplink sub-frame to a downlink sub-frame by the reconfiguration, and transmitting information on interference measured in only the first sub-frame to the eNB in an uplink sub-frame according to a predetermined timing.
Abstract:
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The disclosure may provide a method and an apparatus for saving power of a wireless communication system. According to the disclosure, a method performed by a terminal in a communication system is provided. The method includes: receiving, from a base station, configuration information on a network energy saving mode; identifying that the network energy saving mode is applied; identifying an uplink transmission power for transmitting an uplink signal on an uplink channel in the network energy saving mode or a quasi co-location (QCL) relation of at least one of downlink signal or a downlink channel based on a reference signal in the network energy saving mode; and transmitting, to the base station, the uplink signal on the uplink channel based on the uplink transmission power or receiving, from the base station, the downlink signal on a downlink channel based on the QCL relation.
Abstract:
The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting a higher data transmission rate. The disclosure provides a method performed by a terminal in a wireless communication system, including receiving, from a base station while operating in a normal mode, an indicator indicating a base station energy saving mode, and operating in the base station energy saving mode based on the indicator.
Abstract:
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure relates to a method performed by a base station in a wireless communication system and, particularly, to a method and a device for performing same, the method comprising the steps of: identifying a frequency band; determining a size of a subcarrier spacing (SCS) to be used on the frequency band if a size of the frequency band is smaller than a preconfigured bandwidth size; generating a synchronization signal block (SSB) on the basis of the determined size of the SCS; and transmitting the SSB on the frequency band.
Abstract:
The present disclosure relates to: a communication technique merging IoT technology with a 5G communication system for supporting a data transmission rate higher than that of a 4G system; and a system therefor. The present disclosure 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, and the like) on the basis of 5G communication technology and IoT-related technology. The disclosure provides a method for improving the coverage of an uplink channel for uplink transmission.
Abstract:
The present invention relates to communication technology combining IoT technology with a 5G communication system for supporting higher data 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, and the like) on the basis of 5G communication technology and IoT-related technology. Further, the present invention provides a method and device for resource allocation in a wireless communication system through sidelink inter-UE coordination.
Abstract:
The present disclosure relates to a 5th generation 5G) or pre-5G communication system for supporting higher data rates beyond a 4th generation (4G) communication system such as long-term evolution (LTE). A method for a base station (BS) are provided. The method includes receiving signals from at least one terminal, decoding a signal having a signal strength that is higher than a threshold value among the received signals, identifying whether a resource through which the signal has been transmitted is included in an overlap region in which a first resource region dynamically allocated by control information and a second resource region predetermined by configuration information overlap each other if the decoding of the signal fails, and skipping storage of the received signal in a buffer if the resource through which the signal has been transmitted is included in the overlap region.