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.
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:
An MBMS service reception method and an apparatus are provided for facilitating reception of Multimedia Broadcast/Multicast Service (MBMS) provided in the Long Term Evolution (LTE) system. The method for receiving MBMS in a radio communication system includes receiving User Service Description (USD) information including time information of the MBMS in a connected mode, determining whether a session of the MBMS has started based on the time information, and receiving, when the MBMS session has started, MBMS data of the MBMS session. The MBMS service reception method and apparatus of the present invention facilitates receiving the MBMS service.
Abstract:
A data communication method of a terminal of a mobile communication system is provided. The data communication method includes transmitting a first message including location-related information of the terminal to a base station, receiving a second message including a Wireless Local Area Network (WLAN) Access Point (AP) list corresponding to the location-related information of the terminal, and scanning, if the WLAN AP list includes at least one WLAN AP, for WLAN APs included in the WLAN AP list.
Abstract:
An in-device coexistence interference report control method of a network for terminal to inform the network of interference among heterogeneous radio communication modules coexisting in the terminal is provided. The method includes determining, at a terminal when a terminal capability enquiry message is received from a base station, whether the base station supports an In-Device Coexistence (IDC) interference report, transmitting, when the IDC interference report is supported, a terminal capacity information message to the base station, receiving a Radio Resource Control (RRC) connection reconfiguration message including information on whether terminal's IDC interference indicator transmission is permitted from the base station; and transmitting an RRC connection reconfiguration complete message to the base station in response to the RRC connection reconfiguration message. The in-device coexistence interference indication control method is advantageous in preventing the UE from transmitting useless in-device coexistence interference indication messages, resulting in reduction of unnecessary signaling.
Abstract:
The present disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure discloses a method by which user equipment reports a radio link failure (RLF) of a scheduling secondary cell (sSCell) in a wireless communication system, the method comprising the steps of: receiving cross carrier scheduling (CCS) configuration information and an indication of addition of an sSCell; receiving at least one of radio link monitoring (RLM) configuration information and RLF configuration information regarding the sSCell; performing an RLM operation on the sSCell on the basis of at least one of the RLM configuration information and the RLF configuration information; detecting an RLF state of the sSCell on the basis of the RLM operation; and reporting the RLF state of the sSCell on the basis of the result of the detection.
Abstract:
A method performed by user equipment in a wireless communication system, provided in the present disclosure, may comprise the steps of: identifying that DRX has been configured; receiving a physical downlink control channel (PDCCH) at an active time of the DRX, the PDCCH including information for requesting one-shot HARQ feedback, on the basis of a request for the one-shot HARQ feedback, performing HARQ feedback corresponding to an identifier (ID) of a first HARQ process; and starting a DRX HARQ round trip time (RTT) timer associated with the first HARQ process.
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 operating a terminal is provided. The method includes receiving a first radio resource control (RRC) message including information for RRC connection suspension, maintaining a signaling radio bearer (SRB) 0 and suspending a data radio bearer (DRB) and at least one other SRB based on the first RRC message, transmitting, to a base station, a second RRC message for requesting RRC connection resumption through the SRB0, receiving, from the base station, a third RRC message for the RRC connection resumption through an SRB1, and resuming an SRB2 and the DRB based on the third RRC message.
Abstract:
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. The present disclosure provides a method performed by a user equipment (UE) in a wireless communication system, the method comprising: receiving, from a base station associated with a serving cell, a configuration of a non-serving cell, generating a beam measurement report of the non-serving cell based on the configuration, transmitting, to the base station associated with the serving cell, the generated beam measurement report of the non-serving cell, receiving, from the base station associated with the serving cell, information on a transmission configuration indicator (TCI) state indicates TCI state of the non-serving cell, based on the beam measurement report, stopping a time alignment timer associated with the serving cell based on the information on the TCI state: and performing random access procedure on the non-serving cell based on the information on the TCI state.