Abstract:
The present invention relates to a method for reporting a buffer status and an apparatus therefor in a heterogeneous wireless communication system. A terminal receives a configuration message for a multi-RAT integration scheduling from a cellular controller, and, on the basis of the configuration message, can report the buffer status in a format comprising identification information for a logic channel and a multi-RAT scheduling indication field.
Abstract:
The present invention relates to generating an interference pattern for controlling inter-cell interference, a method for signaling therefor, and an apparatus utilizing the method. The method for signaling an interference pattern according to the present invention may comprise the steps of: determining the length and cyclic shift offset for a first interference pattern to be allocated to a set reference resource from among interference pattern sets; generating a cell-specific sequence to which the cyclic shift offset of the first interference pattern has been applied; and allocating the first interference pattern and cell-specific sequence to a resource and transmitting same.
Abstract:
Disclosed are a method and a device for determining a cell identifier. A method for determining a cell identifier can comprise the steps of: a network control unit generating an Nth neighbor cell list which comprises information about a neighboring cell of a search cell; the network control unit receiving, from a search cell, information about a global cell identifier and a first PCI of an unknown cell; the network control unit determining whether or not the unknown cell is a moving cell on the basis of the global cell identifier; and, if the unknown cell is a moving cell and the first PCI and a second PCI of a neighbor cell that is comprised in the Nth neighbor cell list, the network control unit transmitting to the moving cell a PCI change signal that requests changing of the first PCI.
Abstract:
In the present invention, a method for synchronizing frequency and time in a wireless communication system and an apparatus for supporting the same are disclosed. Particularly, a method for synchronizing frequency and time performed by a terminal in a wireless communication system may include receiving a specific signal including a PSS, compensating the specific signal with at least one time offset candidate, generating at least one first differentiation value, generating at least one second differentiation value, calculating a cross correlation value between the at least one first differentiation value and the at least one second differentiation value, and estimating a time offset and a frequency offset of the PSS based on a time offset candidate that corresponds to a greatest cross correlation value among at least one cross correlation value calculated for at least one time offset candidate.
Abstract:
The present invention relates to a method and an apparatus for generating a signal for low latency in a wireless communication system. The method, according to one embodiment of the present invention, for a communication device generating a situation-reporting signal for low latency and transmitting the signal to a base station in a wireless communication system comprises the steps of: generating the situation-reporting signal on the basis of a pre-set, specific situation recognized by the communication device; and transmitting the generated situation-reporting signal to the base station, wherein the situation-reporting signal may be generated so as to have a subcarrier spacing which is a pre-set number of times larger than a subcarrier spacing of a legacy communication system, the pre-set number being an integer.
Abstract:
A method and a user equipment (UE) for transmitting sounding reference signals via multiple antenna ports in a wireless communication system are discussed. The method according to one embodiment includes receiving a parameter via a higher layer; applying a code division multiplexing (CDM) scheme to the sounding reference signals using the parameter; applying a frequency division multiplexing (FDM) scheme to the sounding reference signals when the parameter is a first value; and transmitting the sounding reference signals via the multiple antenna ports.
Abstract:
A method is provided for receiving uplink control information (UCI) in a wireless access system supporting a carrier aggregation. An evolved Node-B (eNB) transmits, to a user equipment (UE), two or more physical downlink shared channels (PDSCHs) via two or more downlink component carriers, respectively. The eNB receives, from the UE, the UCI for the two or more downlink component carriers. The UCI includes acknowledgement information and channel quality information (CQI) for each of the two or more downlink carriers. The UCI is performed by using a channel coding with respect to the UCI according to a payload size of the UCI when the UCI is transmitted by using a physical uplink control channel (PUCCH) format 3. The UCI is performed by using a rate matching with respect to the channel coded UCI for the PUCCH format 3.
Abstract:
In this disclosure, methods for pre-compensation of the phase shifting error, and apparatuses for the same are disclosed. In one example, a device performs precoding of a digital signal, while acquiring information on an error caused by a phase shifting of the precoding. Then, the device performs phase compensation on the digital signal based on the acquired information. Here, the phase compensation may compensate different amount of phase based on an amount of the phase shifting of the precoding. This phase compensated-digital signal is converted to an analogue signal, and is transmitted to a receiver.
Abstract:
The present invention relates to a wireless communication system. A base station for transmitting a signal in a wireless communication system supporting multi user-multiple input and multiple output (MU-MIMO), according to another embodiment of the present invention, comprises: a radio frequency unit (RF); and a processor, wherein the processor can be configured to generate beams for subgroups including a plurality of terminals using analog beamforming, compensate beam phase difference which occurs between beams of subgroups using digital beamforming, after analog beamforming, and transmit, to the terminals, signals generated based on analog beamforming and digital beamforming.
Abstract:
The present invention relates to a wireless communication system. A method for transmitting a signal from a base station in a wireless communication system supporting multiuser-multiple input and multiple output (MU-MIMO), according to one embodiment of the present invention, comprises the steps of: generating beams of subgroups including a plurality of terminals using analog beamforming; differentiating signals transmitted to each of the terminals using digital beamforming; and transmitting, to the terminals, signals generated based on analog beamforming and digital beamforming, wherein the weight of analog beamforming may be determined based on channel state information obtained through an uplink reference signal.