Abstract:
A method and apparatus are provided for transmitting power headroom information by a terminal in a mobile communication system. The method includes obtaining, by the terminal, an uplink transmission resource; obtaining, by the terminal, a path loss; and if the path loss is changed more than a threshold since a last transmission of a power headroom, obtaining power headroom information using a maximum transmission output of the terminal and a transmission power of the terminal, and transmitting the power headroom information using the uplink transmission resource.
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 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 performing communication using an unlicensed band includes reserving a channel of the unlicensed band using a control frame supporting WLAN by a WLAN module, when reserving the channel of the unlicensed band succeeds, determining whether the channel of the unlicensed band is used by a mobile communication module, and transmitting data supporting the unlicensed band through the reserved channel of the unlicensed band.
Abstract:
The present specification discloses a mobile communication system. More particularly, the present invention relates to a method and an apparatus for transmitting and receiving data using a plurality of carriers in a mobile communication system.
Abstract:
The present specification discloses a mobile communication system. More particularly, the present invention relates to a method and an apparatus for transmitting and receiving data using a plurality of carriers in a mobile communication system.
Abstract:
The present invention relates to a method and to an apparatus for optimizing the power consumption of a terminal in a mobile communication system. The method for optimizing power consumption of a terminal in a mobile communication system comprises: a determination step of determining whether there is a need for changing a configuration for a discontinuous reception operation of the terminal; and a transmission step of transmitting, to a base station, a request message for a change in the discontinuous reception operation, if it is determined that the change is needed.
Abstract:
A method of automatically adjusting a mobility parameter is disclosed. In the method, through sending the peer eNB the message containing different handover thresholds, the relative adjustment value corresponding to each threshold and/or the target frequency information to which the handover threshold is adjusted, the peer eNB can learn that which threshold is adjusted by the source eNB, so as to adjust the corresponding parameter. In this way, the accuracy and efficiency of automatic adjustment of the mobility parameter are improved, and the destination eNB can adjust the mobility parameters of all cells working on the same frequency, so as to guarantee that the adjustment of the mobility parameter for handing over from the source cell to the destination cell working on the same frequency has no negative influence. By the method of the present invention, the automatic adjustment of mobility parameter between different frequencies or different access systems becomes available and can be supported in the case of the self-optimization of mobile load balance and the self-optimization of mobile robustness, so as to improve the performance of mobile communication system.
Abstract:
A method for transmitting a channel state by a terminal in a communication system, according to one embodiment, comprises the steps of: receiving discontinuous reception (DRX) configuration information from a base station; determining whether the terminal is set to transmit channel state information only in onDuration according to a DRX operation; determining whether an arbitrary subframe to be received is a subframe included in onDuration if the terminal is set to transmit the channel state information only in onDuration according to the configuration; and not transmitting the channel state information on the arbitrary subframe if the arbitrary subframe is not a subframe included in onDuration. According to the embodiment, the terminal can efficiently report channel state information.
Abstract:
Methods and apparatuses are provided for establishing time alignment by a terminal in a mobile communication system. Information for identifying a preamble on a downlink control channel is received from a base station. The preamble is transmitted to the base station based on the information for identifying the preamble. A response message including timing adjustment information, information for a channel quality indicator (CQI) request, and uplink resource information on a downlink shared channel is received from the base station. The time alignment is established based on the timing adjustment information included in the response message. A CQI is transmitted based on the information for the CQI request and the uplink resource information.
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:
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.