Embodiments of the present invention provide a method and an apparatus for controlling transmit power of user equipment. The method includes: when total uplink transmit power of user equipment UE exceeds maximum allowed transmit power, calculating a first gain factor according to the maximum allowed transmit power; performing quantization processing on the first gain factor according to a gain factor of a first physical channel, to obtain a second gain factor, where the first physical channel includes a DPCCH2; reducing a gain factor of a second physical channel to the second gain factor, to reduce transmit power of the second physical channel, so that the total uplink transmit power of the UE does not exceed the maximum allowed transmit power, where the second physical channel includes an HS-DPCCH. This reduces a calculation error and improves control accuracy of transmit power.

A technique is disclosed for reducing a number of transmissions of power control signals to a wireless device in a communication network. The technique is performed in the communication network or a network node and involves the determining if the wireless device is implementing a routine for discarding a power control signal. The technique further involves the reducing of the number of transmissions of power control signals to the wireless device based on the determining if the wireless device is implementing a routine for discarding a power control signal.

A wireless device receives control message(s) comprising parameters of a plurality of cell groups and a pathloss reference for each secondary cell. The wireless device transmits uplink signals in a first secondary cell in a secondary cell group. Transmission power of the uplink signals is determined employing a received power of the pathloss reference assigned to the first secondary cell. Timing of the uplink signals in the secondary cell group employs a synchronization signal on an active secondary cell in the secondary cell group as a timing reference.

Provided is a pre-5.sup.th-Generation (5g) or 5G communication system for supporting higher data rates Beyond 4.sup.th-Generation (4g) communication system such as Long Term Evolution (LTE). The present disclosure provides a method for transmitting data, including: performing, by a Long-Term Evolution (LTE) equipment, Clear Channel Assessment (CCA) in one channel of a unlicensed band; and determining, by the LTE equipment, whether the channel can be occupied according to a CCA measurement value in the channel, and determining a data transmission parameter if it is determined that the channel can be occupied. The present disclosure also provides a corresponding apparatus. According to the method and apparatus provided by the present disclosure, the transmission power of the apparatus on the unlicensed band may be controlled, channel seizing opportunity is increased and effective coexistence is ensured.

The present technology relates to a wireless communication apparatus and method, and a program which enable communication to be performed more efficiently. The wireless communication apparatus includes a preamble generating unit configured to generate a preamble signal including header information, an inter-training generating unit configured to generate an inter-training signal including at least part of information of the header information, and a wireless transmission processing unit configured to transmit transmission data after transmitting the preamble signal in at least one or more frequency channels among a plurality of the frequency channels and transmit a plurality of the inter-training signals by utilizing one or a plurality of the frequency channels among the plurality of the frequency channels during a transmission period of the transmission data. The present technology can be applied to a wireless communication apparatus.

A method for power control includes: setting a transmission power for a small cell; determining periodically, when the small cell is operated with a low transmission power, whether a Reference Signal Receiving Quality RSRQ value corresponding to a User Equipment UE with worst channel quality in a serving cell is less than a preset RSRQ threshold; and augmenting the transmission power by a step value when the RSRQ value is less than the preset RSRQ threshold.

A communication system that involves superimposing data over DC power. The data takes the form of high bitrate digital signals, where the bitrate is much higher than 0 Hz (DC); this separation allows the AC signal to be easily separated from the DC power. The physical system consists of a two conductor cable, and integration is modular, in that multiple slaves can be connected and disconnected to a master through a routing bus also comprising two conductors. The master can communicate bi-directionally with the slave(s), and the data is encoded using DC-balanced encoding in an FPGA. The data is sent to and from a differential signaling transmitter/receiver pairs at each end of the cable. The system is may be used with position sensors, and provides the benefit of reducing cable costs and sensor size due to the decrease in number of conductors and elimination of power components in the sensor.

A communication system that involves superimposing data over DC power. The data takes the form of high bitrate digital signals, where the bitrate is much higher than 0 Hz (DC); this separation allows the AC signal to be easily separated from the DC power. The physical system consists of a two conductor cable, and integration is modular, in that multiple slaves can be connected and disconnected to a master through a routing bus also comprising two conductors. The master can communicate bi-directionally with the slave(s), and the data is encoded using DC-balanced encoding in an FPGA. The data is sent to and from a differential signaling transmitter/receiver pairs at each end of the cable. The system is may be used with position sensors, and provides the benefit of reducing cable costs and sensor size due to the decrease in number of conductors and elimination of power components in the sensor.

According to one embodiment, a method of operating a wireless terminal may include configuring a first group of component carriers, and while configured with the first group of component carriers, communicating a first MAC CE including a first bit map having a first bit map size with bits of the first bit map corresponding to respective component carriers of the first group of component carriers. The method may also include configuring a second group of component carriers wherein the first and second groups of component carriers are different. While configured with the second group of component carriers, a second MAC CE may be communicated, wherein the second MAC CE includes a second bit map having a second bit map size with bits of the second bit map corresponding to respective component carriers of the second group of component carriers. Moreover, the first and second bit map sizes may be different.

An apparatus and method for transmitting an indicator of channel quality while minimizing the use of a broadcast channel is described. A metric of forward link geometry of observed transmission signals is determined. An indicator of channel quality value is determined as a function of the observed transmission signals. An access sequence is selected, randomly, from one group of a plurality of groups of access sequences, wherein each of the plurality of groups of access sequences correspond to different ranges of channel quality values.