The present invention relates to a method and an apparatus for transmitting/receiving using multiple carriers in a mobile communication system. A method for transmitting/receiving data by a terminal using multiple carriers in a mobile communication system according to the present invention comprises the steps of: receiving a serving cell addition control message including uplink subframe pattern information on a master serving cell group or a slave serving cell group from a base station; establishing synchronization with a serving cell included in the serving cell addition control message; and, when a command for activating the serving cell with which the synchronization is established is received, transmitting/receiving data to/from the base station through the added serving cell.

This application provides example uplink transmit power determining methods and example terminal devices. One example method includes: determining a total transmit power of a first plurality of uplink signals located in a first time domain resource, wherein the first plurality of uplink signals include MsgA PRACH; and when the total transmit power of the first plurality of uplink signals exceeds a maximum transmit power of a terminal device, determining a transmit power of the MsgA PRACH based on a power priority of the MsgA PRACH, wherein the power priority of the MsgA PRACH is same as a power priority of Msg 1 PRACH in a primary cell.

Disclosed are a signal sending method, a priority configuration method, and a device. The signal sending method includes: determining that S signals overlap in time domain; determining M signals in the S signals based on a maximum transmit power of a terminal device and priorities of the S signals, where the S signals include n sidelink signals and k uplink signals, n is a positive integer, k is an integer greater than or equal to 0, a total transmit power of the M signals is less than or equal to the maximum transmit power, and M is a positive integer; and sending the M signals. In embodiments of this application, a plurality of sidelink signals may be simultaneously sent, or a sidelink signal and an uplink signal may be simultaneously sent, thereby resolving a problem that currently a sidelink signal and an uplink signal cannot be simultaneously sent.

Certain aspects of the present disclosure generally relate to wireless communication. In some aspects, a wireless communication device may receive one or more downlink control information (DCI) transmissions including a plurality of transmit power control (TPC) commands. The plurality of TPC commands may relate to an uplink channel transmit power for a plurality of uplink beam-pairs. The wireless communication device may determine the uplink channel transmit power for the plurality of uplink beam-pairs based at least in part on the plurality of TPC commands. Numerous other aspects are provided.

Certain aspects of the present disclosure relate to methods and apparatus for data transmission in synchronization slots. A method for use by a base station for data transmission in synchronization slots includes transmitting a synchronization signal (SS) burst, wherein different SS blocks of the burst are transmitted using different transmit beams and performing frequency division multiplexing (FDM) or time division multiplexing (TDM) to include one or more other types of signals that need to be multicast and are also transmitted using the different transmit beams.

According to one embodiment of the present invention, a method by which a terminal receives a multimedia broadcast multicast service (MBMS) signal on the basis of non-orthogonal multiple access (NOMA) operation in a wireless communication system comprises the steps of: receiving an MBMS signal including a basic MBMS layer and an extended MBMS layer multiplexed by different power values on a power domain; and clearing of the basic MBMS layer from the received MBMS signal so as to acquire the extended MBMS layer, wherein the basic MBMS layer is received by a single frequency network (SFN) method from a serving cell and a neighbor cell, and the extended MBMS layer is received from the serving cell and not from the neighbor cell.

Disclosed is a radio communication system in which transmission parameters, such as MCS of MBSFN, the number of subframes, and a transmission power of a reserved cell, are adaptively output, based on a unicast traffic volume in a MBSFN area, a number of terminals, and a number of cells of the MBSFN area, so that a system throughput in the MBSFN area is maximized while satisfying an MBSFN quality requirement condition.

A transmit power control method is disclosed. An example method includes obtaining a path loss between a to-be-adjusted wireless device and each of multiple wireless devices. A transmit power of the to-be-adjusted wireless device is adjusted according to a neighbor path loss and a target power. The neighbor path loss is a function of a neighbor path loss set. The neighbor path loss set is a set of path losses of a neighbor wireless device set. The neighbor wireless device set is a set of at least two wireless devices among the multiple wireless devices, where path losses between the at least two wireless devices and the to-be-adjusted wireless device are lowest. A layer closest to the to-be-adjusted wireless device is used as a reference to adjust the transmit power, and interference between wireless devices is reduced.

The present invention relates to a method and an apparatus for transmitting/receiving using multiple carriers in a mobile communication system. A method for transmitting/receiving data by a terminal using multiple carriers in a mobile communication system according to the present invention comprises the steps of: receiving a serving cell addition control message including uplink subframe pattern information on a master serving cell group or a slave serving cell group from a base station; establishing synchronization with a serving cell included in the serving cell addition control message; and, when a command for activating the serving cell with which the synchronization is established is received, transmitting/receiving data to/from the base station through the added serving cell.

An information processing apparatus is provided. The information processing apparatus includes a communication interface configured to perform a wireless communication with an external apparatus and to transmit data to the external apparatus, and a controller configured to calculate a required bandwidth of a wireless communication as required by at least one application and to adjust a transmission power of the communication interface based on the calculated required bandwidth, when the at least one application is determined to be executed.