Abstract:
Ein Verfahren gemäß einer Ausführungsform der vorliegenden Erfindung, durch das ein erstes drahtloses Gerät Beamforming in einem drahtlosen AV-System aufrechterhält, weist die Schritte auf: Übertragen eines Pakets, das ein Nicht-Trainingsfeld und eine Vielzahl von Trainingsfeldern enthält, an ein zweites drahtloses Gerät, wobei das Nicht-Trainingsfeld basierend auf einer Beste-Sektoren-Kombination unter mehreren Kandidatensektorkombinationen übertragen wird, die zwischen dem ersten drahtlosen Gerät und dem zweiten drahtlosen Gerät vorbestimmt sind, und wobei die Vielzahl von Trainingsfeldern basierend auf der Vielzahl von Kandidatensektorkombinationen übertragen wird; Empfangen von Kandidatenstrahl-Rückmeldeinformation in Antwort auf die Vielzahl von Trainingsfeldern; Bestimmen, auf der Basis der Kandidatenstrahl-Rückmeldeinformation, ob ein Kanalwechsel aufgrund eines Hindernisses auftritt; und Aktualisieren der Beste-Sektoren-Kombination auf der Basis der Kandidatenstrahl-Rückmeldeinformation, wenn bestimmt wird, dass der Kanalwechsel auftritt.
Abstract:
A method and apparatus for transmitting frames having a signaling field (SIG) for a second type of station (STA) in a wireless communication system are provided. For this, STA prepares a frame having a first part for a first type of STA and a second part for the second type of STA. Here, the second part includes a first signaling field (HE-SIG A) for common control information and a second signaling field (HE-SIG B) for signaling information comprising user specific control information. Regarding the second signaling field, independent signaling information for the second signaling field (HE-SIG B) is to be transmitted for each 20 MHz bandwidth within a first 40 MHz bandwidth. And the signaling information of the first 40 MHz bandwidth is duplicated in a second 40 MHz bandwidth, when the frame is to be transmitted in a bandwidth equals to or greater than 80 MHz. STA transmits this prepared frame to one or more STAs.
Abstract:
The present invention relates to a wireless access system supporting millimeter waves (mmWave) and provides methods for performing fast fallback so as to avoid link disconnections and devices for supporting same. The method whereby a legacy base station supports the fast fallback of a mmWave terminal in a wireless access system supporting millimeter waves (mmWave), according to one embodiment of the present invention, may comprise the steps of: receiving, from the mmWave terminal, a first fallback request message for requesting fast fallback; operating a fallback timer for determining whether or not to perform fallback after receiving the first fallback request message; and determining whether or not a second fallback request message for requesting fast fallback has been received from a mmWave base station within the fallback timer.
Abstract:
The present invention provides methods for allocating a timing advance (TA) value, which is used in a wireless access system supporting carrier aggregation (CA), methods for adjusting a wireless frame transmission time using the TA value, and apparatuses for supporting same. The method for adjusting the transmission timing in the wireless access system supporting carrier aggregation, according to one embodiment of the present invention, comprises the following steps: receiving a physical downlink control channel (PDCCH) signal including a reservation bit (for example, a serving cell indicator) for indicating at least one serving cell; receiving a media access control (MAC) message including the TA value on an uplink wireless frame; and transmitting an uplink signal by applying the TA value from a serving cell indicated by the reservation bit.
Abstract:
A method and apparatus for performing a handover in a wireless communication system are disclosed. The method for performing a handover of a user equipment (UE) in a wireless communication system includes measuring a first reception power from a first transmission point and a second reception power from a second transmission point; and determining transmission of a measurement report for the handover to the second transmission point. The transmission of the measurement report is determined using the first reception power, the second reception power, an offset value, and a value related to uplink transmission power of the user equipment (UE).
Abstract:
Disclosed are a method and apparatus for transmitting uplink control information in a wireless communication system. A method for transmitting uplink control information by a terminal in a wireless communication system may comprise the steps of: receiving, from a base station, information on a primary cell (Pcell) and at least one secondary cell (Scell) configured for said terminal; and transmitting the uplink control information through the specific Scell configured for said terminal when said Pcell and said Scell are set to different time division duplex (TDD) downlink (DL)/uplink (UL) configurations and said terminal is set to simultaneously transmit a physical uplink control channel (PUCCH) and a physical uplink shared channel (PUSCH).
Abstract:
Disclosed is a method for transmitting channel state information (CSI) in a wireless access system supporting carrier aggregation/multiple cells and a terminal therefor. Specifically, the method comprises the steps of: if a collision occurs between starting points of periodic CSI reports for first and second cells, calculating the number of resource elements using the biggest bit size among CSI bit sizes for first and second cells; adjusting the bit of the CSI with the highest priority among the CSIs of the first and second cells to match the biggest bit size; transmitting, to the base station, the adjusted bits of the CSI with the highest priority, which have been mapped to the calculated resource element.
Abstract:
In the present invention, a method for transmitting/receiving data in a wireless access system and a base station for same are disclosed. More particularly, the method comprises the following steps: setting a cell group per at least one cell having an identical uplink-downlink configuration, if a plurality of cells are set to a user equipment; performing via a first cell cross-cell scheduling with regard to a second cell, which belongs to a cell group that is different from that including the first cell, according to the uplink-downlink configuration of the first cell; confirming the occurrence of a collision subframe, in which an uplink subframe and a downlink subframe exist simultaneously in the same time interval, in two cells performing the cross-cell scheduling; and transmitting/receiving data with the user equipment when scheduled in the collision subframe due to the cross-cell scheduling, by modifying a transmission position of the uplink or the downlink according to the cross-cell scheduling.
Abstract:
The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and an apparatus for a macro base station transmitting control information, comprising the following steps: transmitting to a pico base station allocation information on a first set of subframes with limited downlink signal transmission; transmitting to the pico base station allocation information on a second set of subframes which belong to a U set of subframes; and transmitting the control information by means of the first set of subframes, wherein the control information for the macro base station is transmitted from subframes in the first set of subframes which do not belong to the second set of subframes, and the control information for the pico base station is transmitted from the subframes in the first set of subframes which belong to the second set of subframes.