摘要:
A method and apparatus for activating a deactivated Component Carrier in a cellular communication system supporting carrier aggregation. The method includes receiving, from a Base Station (BS), UpLink (UL) scheduling information for a UL CC in a deactivated state; determining whether a DownLink (DL) CC associated with the UL CC is activated; and activating the DL CC, when the DL CC is not activated.
摘要:
A method and an apparatus for transmitting Hybrid Automatic Repeat reQuest (HARQ) Acknowledgement/Negative Acknowledgement (ACK/NACK) are provided. The HARQ ACK/NACK transmission method includes receiving a Physical Downlink Shared Channel (PDSCH) in a subframe of a first cell, identifying an ACK subframe for transmitting HARQ ACK/NACK corresponding to the PDSCH, and transmitting the HARQ ACK/NACK in the identified ACK subframe of a second cell.
摘要:
A Channel Status Information (CSI) transmission method and apparatus of a terminal are provided for use in a wireless communication system. In the wireless communication system supporting carrier aggregation, the terminal transmits the CSIs of component carriers without conflict of their transmission time points, resulting in an improvement of system performance. In a case where the transmission time points are determined to overlap unavoidably, the terminal transmits the CSI as compressed.
摘要:
A method and apparatus for transmitting and receiving channel status information in a mobile communication system including a distributed antenna system. The channel status information feedback method of the present invention includes transmitting, to a base station, received signal strengths of reference signals transmitted through at least one of antennas distributed in a service area of the base station and transmitting, to a base station, channel status information corresponding to at least one antenna selected by the base station.
摘要:
A method and an apparatus for performing random access and uplink transmission of a User Equipment (UE) supporting Carrier Aggregation (CA) are provided. The method includes determining whether a Scheduling Request (SR) is pending, determining, when the SR is pending, whether an uplink transmission resource is available in a current Transmission Time Interval (TTI), determining, when the uplink transmission resource is not available, whether a Physical Uplink Control Channel (PUCCH) resource is configured for transmission of the SR, and initiating, when the PUCCH resource is not configured, a random access process in a primary cell. The random access method and apparatus of the present invention is advantageous to reduce the waste of transmission resources.
摘要:
A User Equipment (UE) category handling method and an apparatus for handling late version UE category attached to an early release version network in a Long Term Evolution (LTE) system are provided. A communication method includes transmitting a terminal capability report message including multiple terminal categories, receiving a Radio Resource Control (RRC) connection reconfiguration message including a terminal category to be used by the terminal according to serving base station of the terminal, and communicating with the network using the terminal category received from the network. The UE category handling method and apparatus of the present invention allows the UE to report a network-adaptive UE category, thereby avoiding soft buffer problem caused by version information mismatch and facilitating communication with the network without malfunctioning.
摘要:
A method and an apparatus for configuring uplink transmission power and apparatus in a mobile communication system supporting downlink and uplink carrier aggregation are provided. The method includes determining a per-terminal maximum transmission power and per-serving cell maximum transmission powers based on ΔTC,c as a value for allowing an adjustment of additional transmission power for multiple serving cells, Maximum Power Reductionc (MPRc) as a value determined according to an amount of transmission resources allocated to the terminal, and Additive-MPRc (A-MPRc) as a value determined according to local characteristics and frequency band characteristics, determining per-serving cell uplink transmission powers by restricting required transmission powers for respective serving cells to the corresponding per-serving cell maximum transmission powers, comparing a sum of the per-serving cell uplink transmission powers with the per-terminal maximum transmission power, and adjusting the per-serving cell uplink transmission powers according to comparison result.
摘要:
A secondary carrier activation/deactivation method for activating/deactivating secondary carriers in addition to a primary carrier is provided for a mobile communication system supporting carrier aggregation. The method includes identifying, when a secondary carrier control message is received from a base station, carriers to be activated are deactivated, determining, when the message includes a secondary carrier activation command, whether a first time point has arrived, and executing, when the first time point arrives, predetermined first operations. The present invention is advantageous to avoid malfunctions in communication system supporting carrier aggregation by defining UE operations to be taken in SCell activation and deactivation.
摘要:
A control information transmission and reception method based on a spatial-multiplexing gain, are provided. The control information may be transmitted by obtaining the spatial-multiplexing gain using an E-PDCCH region, and thus, a transmission efficiency of the control information may be improved. The common control information used for decoding the E-PDCCH may be transmitted via a PDCCH, and thus, a base station supporting both a general terminal and an enhanced terminal may effectively transmit the control information. Information associated with an indicator indicating whether the E-PDCCH is to be used during a subsequent resource allocation period may be transmitted, and thus, whether decoding with respect to the E-PDCCH is to be performed during the subsequent allocation period may be determined
摘要:
A method and apparatus for allocating resource between uplink ACK/NACK channel and downlink control channel supporting spatial multiplexing in an OFDM-based wireless communication system which configures uplink ACK/NAK channel implicitly using reference signals for discriminating among resource allocation spaces and physical channel resource. The method is capable of multiplexing the uplink ACK/NACK channel associated with the control channel extended by spatial multiplexing into the uplink ACK/NACK channel resource which does not support spatial multiplexing.