Abstract: A method and apparatus for determining a maximum transmission power per carrier in a mobile communication system supporting carrier aggregation are provided. The method for determining the maximum transmission power of a terminal in a mobile communication system supporting carrier aggregation includes checking whether a data channel transmission occurs on each of a plurality of carriers of which Power Headrooms (PHs) are reported in an extended PH Report (PHR), and determining the maximum transmission power of each carrier of the plurality of carriers in consideration of whether the data channel transmission occurs on a carrier corresponding to the data channel transmission.

Abstract: A method of processing state information relating to user equipment in a communications system comprising a radio access network, the method comprising: maintaining current state information relating to the user equipment; and on the basis of a change of connection of the user equipment from a first cell to a second cell: transmitting a current value associated with a given state information part to the target radio access node in response to detecting at least one of one or more predetermined triggers that indicate that the target radio access node may not have received the current value from the source radio access node; or relying on the target radio access node having received the current value from the source radio access node if said at least one of said one or more predetermined triggers is not detected.

Abstract: The present application discloses a method and eNB equipment for supporting seamless handover. The method comprises the following steps of: receiving, by a target eNB, random access information or an RRC connection reconfiguration completion message from a UE; transmitting, by the target eNB, a data transmission stopping indication message to a source eNB; and, stopping, by the source eNB, transmitting downlink data to the UE, and/or stopping, by the source eNB, receiving uplink data from the UE. The present invention further provides several other methods and eNB equipments for supporting seamless handover. By the methods for supporting seamless handover provided by the present invention, the delay of data transmission and the unnecessary data transmission or unnecessary data monitoring of a source eNB can be avoided, the waste of resources and the power consumption can be reduced, and the missing and duplication transmission of data can be avoided.

Abstract: The present invention relates to a method and a device for machine type communication in a wireless communication system, and according to one embodiment of the present invention, a method for receiving a paging message in a wireless communication system for supporting MTC comprises the steps of: determining whether there is a terminal within a normal coverage (NC) or an extended coverage (EC), transmitting, to a network, state information including EC function support information and/or area display information of the NC or the EC according to the determination result; determining a paging receiving time according to an operation mode related to the state information, and receiving the paging message according to the determined paging receiving time.

Abstract: The present invention proposes a method of processing a buffer state report when a wireless communication system uses inter-eNB carrier aggregation technology. According to the present invention, a terminal may be provided with a proper amount of uplink resource allocations by notifying base stations of a buffer state.

Abstract: A multicarrier-based data transmission method and an apparatus for use in a mobile communication system are provided. A Radio Network Temporary Identity (RNTI) reception method of a terminal in a wireless communication system supporting inter-evolved Node B (eNB) carrier aggregation includes receiving cell information on at least one activated cell under control of an eNB, configuring first and second RNTIs allocated by the eNB, monitoring the at least one activated cell for the first RNTI, and monitoring a primary cell among the at least one activated cell for the second RNTI.

Abstract: The present specification relates to a communication method and a communication device, and a random access method of a user equipment (UE), according to one embodiment of the present specification, comprises the steps of: sensing a random access trigger in a connected state; determining the type of the random access trigger when the random access trigger is sensed; and performing congestion control if the type of the random access trigger is a preset type.

Abstract: A method of processing state information in a radio access network (100). The radio access network (100) includes a first radio access node (103, 104) that is associated with a cell (105, 106) and user equipment (102). The method comprises maintaining state information at the user equipment (102), the state information comprising at least one state information part associable with different values. The method further comprises transmitting a current value associated with at least one state information part from the user equipment (102) to the first radio access node (103, 104) in response to detecting at least one predetermined trigger indicating that the first radio access node (103, 104) may not hold the current value. The method further comprises relying on the first radio access node (103, 104) holding the current value associated with the at least one state information part if no predetermined trigger is detected.

Abstract: Provided is a method for reporting a buffer state by a user equipment accessing a first eNB and a second eNB in a communication system, the method comprising the steps of: triggering a buffer state report for new data when the new data is generated; selecting at least one eNB to which the buffer state report is to be transmitted, on the basis of the amount of uplink data to be transmitted; transmitting the buffer state report for the new data to the selected at least one eNB; receiving, from at least one eNB among the first eNB and the second eNB, a resource allocated by the at least one eNB as a response to the buffer state report; and transmitting the new data using the allocated resource.

Abstract: A method of operating a user equipment in a communications system including at least one cell that is controlled by a radio access node. The method includes maintaining current state information relating to the user equipment, the state information including at least one state information part associated with features for which state information reporting is configured in at least one cell, at least one state information part being associable with a plurality of different values, receiving an indication from the radio access node regarding state information held by the radio access node relating to the user equipment, determining whether to report current state information relating to the radio access node on the basis of the received indication, and reporting a current value associated with at least a given state information part to the radio access node.

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: The present invention relates to a method and apparatus in which a terminal performs contention-based access in a mobile communication system, wherein the method comprises: a sensing step of sensing whether or not contention-based access is allowed for at least one logical channel; a receiving step of receiving a contention-based reverse grant from a base station; and a transmitting step of transmitting data to the base station through the logical channel for which the contention-based access is allowed. According to the present invention, contention-based access can be efficiently performed, and the reliability of transmission can be ensured.

Abstract: The present invention relates to a method and apparatus for activating carriers in a mobile communication system, and includes determining, when an instruction message for aggregating multiple carriers is received, a bit position per carrier according to an identifier per carrier in the instruction message; checking, when a carrier state message including a state bitmap indicating state per carrier, the state per carrier according to the bit position per carrier in the state bitmap; and activating/deactivating the carriers according to the per-carrier states. According to the present invention, it is possible to minimize signaling overhead caused by carrier activation and deactivation.

Abstract: Method for radio communication with base station, by user equipment (UE), apparatus in UE for radio communication with base station, a method for radio communication with a UE by a base station, and an apparatus in a base station for radio communication with a UE are provided. The method for radio communication with a base station, by a UE, includes identifying whether an uplink resource for data to be transmitted to the base station is available, when a buffer status report to be transmitted to the base station is triggered; transmitting an uplink packet including the buffer status report using the uplink resource, in response to the uplink resource being available; and transmitting a scheduling request to the base station, in response to the uplink resource not being available for a predetermined time duration, wherein the scheduling request is used for requesting an uplink resource for the buffer status report.

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: Disclosed in a method of discontinuous data reception in a mobile communication system. The method includes: receiving downlink data and decoding the received downlink data by the UE; when the decoding is not successful, starting a timer for receiving retransmitted data; when the downlink data has been received by a configured downlink assignment, operating a downlink carrier, through which the downlink data has been received, in an active time; and when the downlink data has been received by a dynamic transmission resource and the downlink carrier, through which the downlink data has been received, is different from a downlink carrier, through which a scheduling command for the downlink data has been received, operating the downlink carrier, through which the scheduling command for the downlink data has been received, and the downlink carrier, through which the downlink data has been received, in an active time.

Abstract: A method and apparatus for receiving a Scheduling Assignment (SA) by a User Equipment (UE) in a communication system in which a base station transmits the SA including at least one Information Element (IE) are described. The method includes receiving the SA; identifying if a first IE included in the received SA is set with a first predetermined value and at least one bit in a second IE included in the received SA is set with a second predetermined value; and performing an action corresponding to a semi-persistent scheduling, if the first IE included in the received SA is set with the first predetermined value and the at least one bit in the second IE included in the received SA is set with the second predetermined value.

Abstract: To solve the above-mentioned problem, the method for transmitting and receiving a signal by user equipment (UE) through one or more cells, according to one embodiment of the present specification, comprises the steps of: receiving, from a base station, a first message indicating whether one or more cells usable by the UE are enabled; determining which cells to enable or disable on the basis of the first message; and enabling or disabling the selected cells. According to the embodiment of the present specification, by aggregating carriers amongst different base stations, a possibility for the UE to transmit and receive high-speed data through carrier aggregation can increase.

Abstract: Disclosed is a method and apparatus for transmitting data by a terminal in a wireless communication system, the method including transmitting, to a base station, a scheduling request for requesting resources for transmitting a buffer status report, monitoring a control channel to receive resource allocation information, starting a timer for monitoring the control channel if the resource allocation information is received via the control channel, transmitting, to the base station, the buffer status report based on the resource allocation information, and stopping monitoring of the control channel if the timer is expired or a command is received from the base station.

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 cell selection/re-selection method and an apparatus adapted thereto is provided.