The present disclosure is to effectively perform coordinated transmission in a wireless communication system. A base station includes a controller for providing control to generate control information including channel state information and buffer occupancy state related information of terminals, and a communication unit for transmitting the control information. In addition, the present disclosure also includes other exemplary embodiments different from the aforementioned exemplary embodiments.

The invention relates to a method for requesting uplink resources by a user equipment in a communication system, wherein a DRX, Discontinued Reception, function is running at the user equipment. The transmission of a scheduling request for requesting uplink resources to a radio base station is triggered upon triggering of a buffer status report in the user equipment. However, the triggering of the scheduling request is delayed such that the scheduling request is triggered in one of the subframes—preferably the first subframe—of an On-Duration period of a DRX cycle according to the DRX function. Correspondingly, the triggered scheduling request is transmitted to the radio base station in the next possible scheduling request transmission occasion after the triggering of the scheduling request is delayed.

The present invention relates to a wireless communication terminal and a wireless communication method for efficiently scheduling simultaneous uplink transmissions of a plurality of terminals.

To this end, provided are a wireless communication terminal, the terminal including: a transceiver; and a processor, wherein the processor receives, through the transceiver, a trigger frame transmitted by a base wireless communication terminal, and performs a multi-user uplink transmission based on the received trigger frame, wherein the trigger frame includes a predetermined field indicating whether an additional trigger frame is present or not, and a wireless communication method using the same.

Methods and devices are disclosed from the perspective of a first wireless transmit/receive unit (WTRU). In one method, the method includes triggering a first buffer status report (BSR), wherein the first BSR indicates an estimated amount of data expected to arrive.

A communication method and system for converging a 5.sup.th generation (5G) communication system for supporting higher data rates beyond a 4.sup.th generation (4G) system with a technology for Internet of things (IoT) are provided. The communication method and system may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method performed by a terminal for handling scheduling request (SR) cancellation in a wireless communication system is provided. The method comprises identifying that at least one first SR is triggered, identifying whether each of the at least one first SR is triggered for beam failure recovery (BFR) of a secondary cell (SCell), and determining whether to cancel each of the at least one SR based on the identification.

According to one example embodiment, a method may include receiving, by a user equipment, at least one buffer status report configuration from a network entity. The method may further include measuring, by the user equipment, at least one uplink packet arrival time according to the received at least one buffer status report configuration. The method may further include selecting, by the user equipment, at least one buffer status report format. The method may further include transmitting, by the user equipment, at least one uplink time-stamped buffer status report to the network entity according to the selected at least one buffer status report format.

Embodiments of the present disclosure provide methods and apparatus for buffer state report. A method performed at a terminal device may comprise: predicting a buffer size associated with data to be transmitted; and transmitting a buffer state report, BSR, including the predicted buffer size to a network node. A method performed at a network node may comprise: receiving a buffer state report, BSR, including a predicted buffer size associated with data to be received from a terminal device; and transmitting a grant for the data according to the received BSR. The latency of data transmission from the terminal device to the network node may be reduced.

The present invention relates to a method of transmitting uplink data by a user equipment (UE) in a wireless communication system. Especially, the method includes the steps of receiving information about first uplink configured grants (CGs) and second uplink CGs from a network; triggering a Buffer Status Report (BSR); and if at least one of the second uplink CGs can accommodate all of data to be transmitted, transmitting the data to the network on the at least one second uplink CG without transmitting the BSR on the first uplink CG, wherein, if the at least one second uplink CG can accommodate the data partially, the BSR is transmitted to the network on the first uplink CG without transmitting the data on the at least one second uplink CG.

A method for reducing power consumption of a terminal that communicates with a base station in a mobile communication system using a multi-carrier structure composed of a primary component carrier and at least one secondary component carrier comprises: receiving a discontinuous reception (DRX) parameter group for multi carriers from the base station; and setting the multi carriers to the same parameter value, by using the received parameter group. The method for reducing power consumption of the terminal further comprises: performing a downlink control channel receive operation on each carrier according to a DRX cycle. As the base station in the mobile communication system using the multi-carrier structure simplifies the DRX process for reducing power consumption of a terminal by reducing signaling load for the multi-carrier control of the terminal, it becomes possible to reduce power consumption of the terminal.

A wireless communication method is described for managing packet data convergence protocol (PDCP) service data unit (SDU). The method can include receiving, at a first protocol layer of a first communication device, a first service data unit (SDU) and a second service data unit (SDU) for a source from a second protocol layer for transmission to a second communication device. The method can also include starting a first timer with a first initial value for the first SDU, and starting a second timer with a second initial value for the second SDU. The second initial value can be different from the first initial value in response to determining that the second SDU is to be routed differently from the first SDU to the second communication device.