Abstract:
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for power headroom reporting in the wireless communication system, the method comprising: determining a first weight factor for the first BS and a second weigh factor for the second BS if a sum of a power headroom (PH) for the first BS or a PH for the second BS is more than a PH of activated cells of the UE; reducing a size of the PH for the first BS by using the first weight factor; and reducing a size of PH for the second BS by using the second weight factor.
Abstract:
A method and apparatus for configuring a cell in a wireless communication system is provided. A user equipment (UE) receives a radio resource control (RRC) message which includes a configuration for a secondary cell (SCell) and an indication of an initial state of the SCell. The initial state of the SCell is set to either one of an activated state and deactivated state. The UE configures the SCell based on the configuration and the initial state of the SCell.
Abstract:
A method for reporting TAT (time alignment timer) status information at a user equipment (UE) in a wireless communication system is disclosed. The method includes a step of reporting the TAT status information for at least one TAG (time alignment group) to a network when a condition is met, wherein the TAT status information indicates whether the TAT for at least one TAG is running or not.
Abstract:
End-to-end latency measurement scheme is discloses. In this scheme, the UE receives a request message from a network. This request message requests the UE to report transmission or reception timing information. And, the transmission or reception timing information may be for a latency measurement. Thereafter, the UE transmits the transmission or reception timing information to the network.
Abstract:
A method and apparatus for changing Discontinuous Reception (DRX) cycle in a wireless communication system is provided. A wireless device configures a short DRX cycle and a long DRX cycle. When a drx-ShortCycle timer expires, it is determined whether a drxInactivityTimer is run or not. Therefore, the wireless device uses one of the short DRX cycle and the long DRX cycle according to the determination. Discontinuous reception (DRX) cycle can be configured flexibly and a CSI report between the UE and the eNB can be complied with accurately.
Abstract:
A method and apparatus for changing a Discontinuous Reception (DRX) cycle in a wireless communication system is provided. A wireless device configures a short DRX cycle and a long DRX cycle. When the wireless device receives a PDCCH indicating a new data transmission, it determines that the short DRX cycle is used and a running drxShortCycleTimer is stopped for the DRX operation. Discontinuous reception (DRX) cycle can be configured flexibly according to the new data transmission and a CSI report between the UE and the eNB can be complied with accurately and frequently.
Abstract:
The present invention is directed to a method and an apparatus used for in a wireless communication system. Specifically, the present invention is directed to a method of controlling uplink transmission and an apparatus therefore, in which the method comprises: receiving a signal including information related with an assignment of a TAG for SCell; and considering SCell as having no valid uplink timing if TAT of the TAG is not running
Abstract:
In the present invention, a user equipment (UE) receives an UL grant that can be used while the UE is not in RRC_CONNECTED state. If the UE receives a message indicating to leave RRC_CONNECTED state, the UE starts a time alignment timer (I-TAT) when the UE leaves RRC_CONNECTED state. The UE transmits UL data using the UL grant if the UL data becomes available for transmission when the UE is not in RRC_CONNECTED state and if the I-TAT is running.
Abstract:
In the present disclosure, a UE transmits a random access preamble (RAP) on a physical random access channel (PRACH) and a control channel (CCCH) service data unit (SDU) on a physical uplink shared channel (PUSCH); and receives a medium access control (MAC) protocol data unit (PDU) based on transmitting the RAP and the CCCH SDU. The MAC PDU includes a first part, and a second part after the first part. The first part includes multiple UE contention resolution identities (UE CRIDs).
Abstract:
In the present disclosure, a transmitting device receives zero header information from a receiving device, generates a MAC PDU based on the zero header information, and transmits the MAC PDU. The zero header information may include information regarding a logical channel or MAC control element (CE). The MAC PDU may include a MAC subPDU containing data of the logical channel or the MAC CE without corresponding MAC subheader.