Abstract:
A method and apparatus for performing an initial access procedure in a wireless communication system is provided. A low cost user equipment (UE) transmits a list of capabilities to a network, and receives a reject message from the network when at least one of the capabilities is not supported by the network. The list of capabilities may be transmitted during a random access procedure via a random access preamble on a physical random access channel (PRACH) or a message 3 on a physical uplink shared channel (PUSCH). The reject message may be received during the random access procedure a random access response or an acknowledge message for the message 3.
Abstract:
A method and apparatus for allocating resources to a low cost user equipment (UE) in a wireless communication system is provided. A base station (BS) allocates at least one sub-bandwidth among a system bandwidth to a low cost UE, and transmits information on the allocated at least one sub-bandwidth to the low cost UE. The at least one sub-bandwidth may include a set of resource physical resource blocks (PRBs) that the low cost UE can access at a given subframe.
Abstract:
Disclosed are a method and apparatus for transmitting an uplink channel in a wireless communication system. A method for transmitting an uplink channel in a wireless communication system supporting an sTTI is performed by a terminal incapable of the simultaneous transmission of a first uplink channel and a second uplink channel, and includes when a first uplink channel region at a first sTTI overlaps a specific symbol included in a second uplink channel region at a second sTTI, transmitting the first uplink channel to a base station using at least one of a plurality of symbols included in the first uplink channel region symbol other than the specific symbol at the first sTTI and transmitting the second uplink channel to the base station using at least one symbol included in the second uplink channel region at the second sTTI. The specific symbol includes a symbol to which a DMRS related to the second uplink channel is mapped.
Abstract:
According to an aspect of the present disclosure, a method for performing a measurement through a Discovery Reference Signal (DRS) performed by a user equipment (UE) in a wireless communication system includes receiving DRS Measurement Timing Configuration (DMTC) information in relation to a DRS measurement time from a base station (BS) in order to perform a measurement using the DRS; receiving the DRS from one or more cells in a specific carrier frequency based on the received DRS Measurement Timing Configuration information; performing a measurement through the received DRS; and reporting the measurement result to the BS.
Abstract:
A method of performing hybrid automatic repeat request (HARQ) in a carrier aggregation system, the method includes receiving downlink data through a first subframe of a first carrier; transmitting acknowledgement/not-acknowledgement (ACK/NACK) for the downlink data through a second subframe of a second carrier; and receiving the downlink data again through a third subframe of the first carrier, wherein the first carrier is a carrier which s comprised of downlink subframe only.
Abstract:
A disclosure of the present specification provides a method in a user equipment (UE). The method may comprise the steps of: activating a second cell when a request message for activation of the second cell by carrier aggregation is received from a first cell of one base station; receiving, from the one base station, a message including a configuration for switching to dual connectivity; and maintaining, without change, and using a configuration used for the second cell by the carrier aggregation after the switching to the dual connectivity.
Abstract:
Provided are a method and an apparatus for receiving a control channel in a wireless communication system. A user equipment (UE) receives, in the course of configuring a user-centric virtual cell or a cooperation-based cell cluster and performing handover, a physical downlink control channel (PDCCH) and a cell-specific reference signal (CRS) from at least one of an anchor cell or a supporting neighbor cell, and receives data from at least one of the anchor cell or the supporting neighbor cell on the basis of the received PDCCH and CRS.
Abstract:
Provided are a method of controlling transmission power for an uplink control channel for a terminal to which a plurality of cells are assigned, and a device using the method. The method receives a first set of parameters and a second set of parameters that are used for determining transmission power for the uplink control channel and determines the transmission power for the uplink control channel by using the first set of parameters or the second set of parameters, wherein the first set of parameters or the second set of parameters is used according to one of the cells to which the uplink control channel is transmitted.
Abstract:
A method and apparatus for configuring a measurement gap in a wireless communication system is provided. A network transmits a configuration of a measurement gap of a secondary cell group (SCG) in dual connectivity based on a timing of a primary cell (PCell) which belongs to a master cell group (MCG) in dual connectivity. A user equipment (UE) measures inter-frequency or inter-radio access technology (RAT) cells based on the received configuration of the measurement gap of the SCG. The measurement gap of the SCG may be configured as 7 ms.
Abstract:
A method and apparatus for processing aperiodic channel state information (CSI) in a wireless communication system is provided. A user equipment (UE), receives a request for aperiodic CSI report, and assigns capability of the aperiodic CSI report for a master evolved NodeB (MeNB) and a secondary eNB (SeNB) in dual connectivity.