Abstract:
A data transmission method and an apparatus to communicate data on multiple carriers in the mobile communication system are provided. A random access method of a terminal in a mobile communication system including primary and secondary cells operating on multiple carriers according to the present invention includes communicating data after random access in the primary cell, receiving, when the random access is triggered in the secondary cell, information for use in the secondary cell random access from the primary cell, transmitting a preamble in the secondary cell based on the received information, monitoring the primary cell to receive a Random Access Response for the secondary cell, and applying, when the Random Access Response for the secondary cell is received, the information carried in the Random Access Response to the secondary cell in which the preamble has been transmitted.
Abstract:
The present specification discloses a mobile communication sytem. More particularly, the present invention relates to a method and an apparatus for transmitting and receiving data using a plurality of carriers in a mobile communication system.
Abstract:
A data transmission method and an apparatus to communicate data on multiple carriers in the mobile communication system are provided. A random access method of a terminal in a mobile communication system including primary and secondary cells operating on multiple carriers according to the present invention includes communicating data after random access in the primary cell, receiving, when the random access is triggered in the secondary cell, information for use in the secondary cell random access from the primary cell, transmitting a preamble in the secondary cell based on the received information, monitoring the primary cell to receive a Random Access Response for the secondary cell, and applying, when the Random Access Response for the secondary cell is received, the information carried in the Random Access Response to the secondary cell in which the preamble has been transmitted.
Abstract:
The present disclosure relates to communication methods and systems for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system utilizing technology for Internet of Things (IoT). The present disclosure is applicable to intelligent services utilizing 5G communication technology and 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 Secondary Cell (SCell) method and apparatus for activating an SCell are provided for use in a mobile communication system supporting dual connectivity. The method includes receiving a control message instructing activation of at least one SCell, determining whether the SCell is a primary SCell (pSCell) based on the control message, monitoring, when the SCell is the pSCell, a Physical Downlink Control Channel (PDCCH) of the pSCell, and reporting, after starting PDCCH monitoring, Channel Status Information (CSI) for the SCell.
Abstract:
A network selection, a random access method, and an apparatus of a Machine Type Communication (MTC) User Equipment (UE) for use in a Long Term Evolution (LTE) are provided. A cell selection method of an MTC terminal of the present disclosure includes receiving a message from a base station forming a cell, determining whether the message includes an MTC supportability indicator, and barring, when the message includes no MTC supportability indicator, scanning a frequency used in communication with the base station during a determined period.
Abstract:
Provided are a communication method and system that integrate 5G communication systems with IoT technologies to support higher data rates after 4G systems. The present disclosure is based on 5G communication technologies and IoT related technologies, and may be applied to intelligent services such as smart homes, smart buildings, smart cities, smart or connected cars, health care, digital education, retail, and security and safety.The present disclosure relates to a method and apparatus for reducing power consumption in an electronic device supporting machine type communication. There is provided a method of signal processing for an electronic device in a mobile communication system. The method may include: obtaining repetition level information for signal reception; determining a decoding start point and decoding period; and making, if the decoding start point arrives, an attempt to decode the repeatedly received signal at every decoding period on the basis of the repetition level information.
Abstract:
The present disclosure relates to a communication technique of fusing a 5G communication system for supporting higher data transmission rate beyond a 4G system with an IoT technology and a system thereof. The present disclosure may be applied to intelligent services (e.g., smart home, smart building, smart city, smart car or connected car, health care, digital education, retail business, security and safety related service, or the like) based on the 5G communication technology and the IoT related technology. More specifically, a method of the present disclosure for providing multi-connection of a terminal using different radio access technologies in a wireless communication system comprises the steps of: transmitting/receiving data through a first bearer corresponding to a first communication; transmitting/receiving data through a second bearer corresponding to a second communication; receiving, from a base station, a radio resource control (RRC) message which directs reestablishment of the first bearer as the second bearer or reestablishment of the second bearer as the first bearer; and reestablishing the first bearer or the second bearer on the basis of the RRC message.
Abstract:
A method of configuring downlink timings and transmitting a random access response message is provided for a random access procedure in a Long Term Evolution (LTE) system supporting carrier aggregation. The method for adjusting timing of a terminal in a wireless communication system supporting carrier aggregation of at least one carrier includes transmitting a Random Access Preamble to a base station, and receiving a Random Access Response with a Timing Advance Command (TAC) for commanding uplink timing adjustment from the base station, wherein the Random Access Response comprises information indicating a Timing Advance Group (TAG) to which the TAC is applied.
Abstract:
The present invention relates to a method and an apparatus for transmitting control information for device-to-device (D2D) communication. A method for communicating between terminals of a transmission terminal according to an embodiment of the present invention comprises the steps of: determining whether transmission data corresponds to final transmission data; generating a first channel sensing signal including information indicating that the transmission data corresponds to final transmission when the transmission data is final transmission data; and transmitting the transmission data and the first channel sensing signal. According to an embodiment of the present invention, a channel sensing signal, which is necessarily required for a D2D operation of a distributed resource allocation scheme, is used to transmit the control information so that control information can be exchanged between terminals without introducing an additional control channel and signal.
Abstract:
A method for controlling delay tolerant access of a Machine-Type Communication (MTC) device based on a backoff mechanism is provided. The method includes receiving, at a terminal, a paging message including an access barring information update indicator from a base station, and receiving a System Information Block (SIB) including updated access barring information, the SIB being received regardless of modification periods. The terminal receives the SIB including the updated access barring information immediately without waiting for the arrival of next modification period, resulting in improvement of access barring efficiency.