Abstract:
A base station of the present invention configures resources in which a downlink signal is to be transmitted with zero power using resource sets defined for a specific number of antenna ports, regardless of the number of antenna ports actually configured in the base station, and transmits resource information indicating the configured resources to a user equipment. The user equipment of the present invention receives a downlink transmission from the base station, assuming that transmission power of resources corresponding to a resource set indicated by the resource information is zero.
Abstract:
Discloses is a method in which a user equipment (UE) reports channel state information to an evolved Node B (eNB) for beamforming based on multiple antennas in a wireless communication system. Specifically, the method comprises the steps of: receiving information on a plurality of reference signal resources from the eNB; generating channel state information containing information related to one preferred precoder to be applied to the plurality of reference signal resources in common and information related to one linking precoder for connecting the plurality of reference signal resources; and reporting the channel state information to the eNB, wherein the multiple antennas are partitioned into sections of row or column units and the plurality of reference signal resources correspond to the sections.
Abstract:
A method and apparatus for transmitting or receiving channel quality control information through a physical uplink shared channel (PUSCH) in a wireless access system that supports hybrid automatic retransmit request (HARQ). In one embodiment, a user equipment (UE) receives a physical downlink control channel (PDCCH) signal including an initial uplink grant, transmits uplink data using two transport blocks based on the initial uplink grant, receives a negative acknowledgement (NACK) information for one of the two transport blocks, and transmits a channel quality control information along with the one of the two transport blocks which is retransmitted according to the NACK information or a new transport block through the PUSCH to which the HARQ is applied. A number of coded symbols required to transmit the channel quality control information (Q′) is calculated based on the initial uplink grant.
Abstract:
Disclosed is a method for transmitting, by a terminal, feedback information to a network for partial beamforming based on a multi-antenna in a wireless communication system. Specifically, the method comprises: a step of receiving, from the network, reference signals corresponding to antenna sections included in the multi-antenna; a step of selecting one or more beamforming mode among beamforming modes included in a candidate beamforming mode set on the basis of the reference signals, and forming feedback information related to the selected one or more beamforming modes; and a step of transmitting the feedback information to the network, and the feedback information includes a pre-coding matrix index corresponding to at least one of the antenna sections and connection coefficient information for connecting the antenna sections.
Abstract:
A method of transmitting uplink control information (UCI) in a wireless access system supporting carrier aggregation. A user equipment (UE) receives two or more physical downlink shared channels (PDSCHs) via two or more downlink component carriers, respectively. The UE performs channel coding with respect to the UCI according to a payload size of the UCI including acknowledgement information and channel quality information (CQI) for each of the two or more downlink carriers. The UE performs rate matching with respect to the channel coded UCI for a physical uplink control channel (PUCCH) format 3. The UE transmits the rate matched UCI using the PUCCH format 3.
Abstract:
A method for performing hierarchical beamforming in a wireless access system and a device therefor are disclosed. Particularly, the method comprises: an initial step for allowing a base station to transmit a plurality of first beams, to which different steering vectors are applied, to a terminal through corresponding reference signals, and a repetition step for allowing the base station to transmit a plurality of second beams, to which different steering vectors are applied, to the terminal through corresponding reference signals by considering feedback information that contains an index of one or more beams received from the terminal, wherein the repetition step can be repeated up to a predetermined number of times.
Abstract:
The present invention, which is used in a wireless access system supporting device-to-device (D2D) communication, defines a new random access channel region and provides methods for obtaining synchronization between D2D devices in the new random access channel region, and devices supporting same. The method for obtaining synchronization between devices in a wireless access system supporting device-to-device (D2D) communication, according to one embodiment of the present invention, may comprise: a step in which a first terminal receives a D2D preamble from a second terminal via a D2D random access channel (RACH) region in an RACH region; a step in which the first terminal obtains synchronization with the second terminal by using the D2D preamble; and a step in which the first terminal performs D2D communication with the second terminal. The RACH region may comprise a legacy RACH region to which a legacy preamble for performing an RACH procedure with a base station is transmitted, and the D2D RACH region.
Abstract:
A method for transmitting sounding reference signals by a user equipment (UE) in a wireless communication system, and the UE therefore are discussed. The method according to one embodiment includes configuring an initial cyclic shift (CS) value and an initial comb value via a higher layer; and setting a comb value for at least one antenna port according to an Equation A. The method according to the embodiment further includes transmitting the sounding reference signals using the comb value via at least one antenna port.
Abstract:
A method of receiving a random access sequence by a base station in a wireless communication system is disclosed. The method includes transmitting information on at least one of random access formats for different effective channel lengths to the user equipment from a base station, and transmitting a random access sequence based on the at least one random access format from the base station, wherein the random access formats have different lengths of effective channel section for receiving the random access sequence.
Abstract:
A method and apparatus for supporting or performing status mode transition in a convergence network of a plurality of communication systems are disclosed. A method for supporting status mode transition by an entity of a first communication system in a plurality of communication system convergence networks includes: if a triggering condition for triggering transition between an active mode and an idle mode is satisfied, transmitting a first message indicating status mode transition to an entity of a second communication system; receiving a second message including specific information indicating whether the status mode transition is successful from the entity of the second communication system, in response to the first message; and updating status information of the entity of the second communication system on the basis of the second message, wherein the first and second communication systems are heterogeneous communication systems for each other.