Abstract:
A data transmission method of a User Equipment, UE, in a Long Term Evolution, LTE, compliant mobile communications network, and a corresponding UE. The method comprises detecting reconfiguration of a bearer from a split bearer in which uplink Packet Data Convergence Protocol, PDCP, Protocol Data Units, PDUs, are transmitted to both a Master eNB, MeNB, and to a Secondary eNB, SeNB, to a non-split bearer in which uplink PDCP PDUs are transmitted only to the MeNB. If reconfiguration of a bearer from a split bearer to a non-split bearer in which uplink PDCP PDUs are transmitted to the MeNB is detected, the method further comprises initiating retransmission of PDCP PDUs from the first PDCP PDU for which transmission was attempted via the SeNB and for which there has been no confirmation of successful delivery by a protocol layer below the PDCP layer within the UE. The method further comprises retransmitting only PDCP PDUs for which transmission of the PDU was attempted via the SeNB.
Abstract:
A system and a method that reports capability information regarding a dual mode User Equipment (UE) are provided. The UE supports Frequency Division Duplex (FDD) and Time Division Duplex (TDD). The UE capability transmitting method includes receiving a message requesting UE capability information from an evolved Node B (eNB), generating first capability information and second capability information according to the UE capability information requesting message, and transmitting UE capability information including the first and second capability information to the eNB. The first capability information comprises FDD capability information applicable to an FDD mode or TDD capability information applicable to a TDD mode. The second capability information comprises capability information applicable to both the FDD mode and the TDD mode. The system and method can allow a dual mode UE to efficiently report its capability information.
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.
Abstract:
A method and an apparatus for deactivating secondary carriers in a mobile communication system using carrier aggregation are provided. A communication method, for a User Equipment (UE), includes activating a secondary carrier, starting a first timer upon activation of the secondary carrier, starting a second timer when the first timer expires, and deactivating the activated secondary carrier when the second timer expires.
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.