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 for a terminal to receive a service through different wireless communication systems is provided. The method includes identifying whether a request for use of a second wireless communication system that uses a second band is sensed with respect to the terminal that performs communications with a base station of a first wireless communication system through a first band and the second band, when the request for use of the second wireless communication system is sensed, transmitting a message including information indicating a change of user equipment (UE) capability information, and reporting the changed UE capability information based on the message.
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:
A communication method of a terminal for saving a battery of a terminal and reducing a signaling overhead when small data are processed is provided. The communication method includes receiving, from a base station, a first message including at least one of first information indicating whether a first signaling optimization is allowed for the terminal, or second information indicating whether a second signaling optimization is allowed for the terminal, transmitting, to the base station, a second message including at least one of third information indicating whether the first signaling optimization is supported by the terminal, or fourth information indicating whether the second signaling optimization is supported by the terminal, and receiving, from the base station, a third message including fifth information indicating a signaling optimization supported for the terminal.
Abstract:
A method for matching time synchronization between UEs during Device-to-Device (hereinafter referred to as “D2D”) communication in a radio communication system without involving an Evolved Node B (ENB) is proposed. Using the proposed method, all the UEs can operate to match the time synchronization without malfunction in accordance with a synchronization signal of the ENB even if the UE inside an ENB area and the UE outside the ENB area coexist.
Abstract:
A system and a method that employs Extended Access Barring (EAB) when a Machine Type Communication (MTC) device performs an attempt to access an evolved Node B (eNB) in a wireless communication system are provided. When User Equipment (UE) supporting MTC, an MTC device, performs an attempt to access a network, the system and method determines whether it can access the network and performs the access procedure. The system and method can control the operations of UE that performs an attempt to access a network, thereby preventing excessive access.
Abstract:
A system and a method that employs Extended Access Barring (EAB) when a Machine Type Communication (MTC) device performs an attempt to access an evolved Node B (eNB) in a wireless communication system are provided. When User Equipment (UE) supporting MTC, an MTC device, performs an attempt to access a network, the system and method determines whether it can access the network and performs the access procedure. The system and method can control the operations of UE that performs an attempt to access a network, thereby preventing excessive access.
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 in a mobile communication system are provided. The method includes receiving, by the terminal, first information for activating a secondary Cell (SCell) from a base station, activating, by the terminal, the SCell based on the first information, starting, by the terminal, a timer associated with the SCell, restarting, by the terminal, if second information for the activated SCell is received from the base station, the timer associated with the SCell, and, if the timer expires, applying by the terminal, one or more corresponding actions for deactivating the SCell no later than in a predefined subframe, wherein the second information includes at least one of an uplink grant on the activated SCell, a downlink assignment on the activated SCell, and a control message for activating the SCell.
Abstract translation:提供了移动通信系统中的方法和装置。 该方法包括由终端接收用于从基站激活辅助小区(SCell)的第一信息,由终端基于第一信息激活SCell,由终端开始与SCell相关联的定时器 ,由终端重新启动,如果从基站接收到用于激活的SCell的第二信息,则与SCell相关联的定时器,并且如果定时器期满,终端应用一个或多个相应的动作来停用SCell no 晚于预定义的子帧,其中第二信息包括在激活的SCell上的上行链路许可,激活的SCell上的下行链路分配和用于激活SCell的控制消息中的至少一个。
Abstract:
A method and an apparatus in a mobile communication system are provided. The method by a terminal in the mobile communication system includes receiving, by the terminal, first information for activating a secondary cell (SCell) from a base station, activating, by the terminal, the SCell based on the first information, starting, by the terminal, a timer associated with the SCell, restarting, by the terminal, if second information for the activated SCell is received from the base station, the timer associated with the SCell, and if the timer expires, applying by the terminal, one or more corresponding actions for deactivating the SCell no later than in a predefined subframe. The one or more corresponding actions include at least one of preventing, by the terminal, from monitoring a physical downlink control channel (PDCCH) on the SCell and preventing, by the terminal, from monitoring a PDCCH for the SCell.
Abstract:
A method and an apparatus in a mobile communication system are provided. The method by a terminal in the mobile communication system includes receiving, by the terminal, first information for activating a secondary cell (SCell) from a base station, activating, by the terminal, the SCell based on the first information, starting, by the terminal, a timer associated with the SCell, restarting, by the terminal, if second information for the activated SCell is received from the base station, the timer associated with the SCell, and if the timer expires, applying by the terminal, one or more corresponding actions for deactivating the SCell no later than in a predefined subframe. The first information includes a bitmap indicator corresponding to at least one SCell.