Lg Electronics Inc.

Man Young Jung

Sang Wook Lee

Su Hwan Lim

Yoon Oh Yang

Seung Ho Yoo

Jin Yup Hwang

There is provided a method of reducing transmission power. The method may comprise: receiving a network signal, if a carrier aggregation (CA) is configured and if the configured CA corresponds to an intra-band contiguous CA; applying an additional maximum power reduction (A-MPR) for a transmission, based on the network signal. If a configuration of the CA corresponds to a CA_1C and if the aggregated transmission bandwidth is the summation of 75 RBs and 75 RBs, a value of the A-MPR is specified for L_CRB&#x3e;10. The L_CRB is a length of a contiguous resource block allocation.

Method for reducing transmission power and terminal thereof

A wireless communication system that includes a relay node is disclosed. The relay node supporting carrier aggregation (CA) comprises a first antenna for performing communication with a base station through a backhaul link; a plurality of backhaul link radio frequency (RF) chains connected with the first antenna, for transmitting and receiving a radio signal for backhaul link transmission; a second antenna for performing communication with a user equipment through an access link; a plurality of access link RF units connected with the second antenna, for transmitting and receiving a radio signal for access link transmission; and a control unit controlling the plurality of backhaul link RF chains and the plurality of access link RF chains to share at least a part of RF components between the backhaul link RF chains and the access link RF chains.

Architecture and method of relay node RF for carrier aggregation

A radio communication system is disclosed. The method for transmitting a signal by a user equipment in a radio communication system includes generating a plurality of uplink signals, reducing maximum transmit power of the user equipment in consideration of a signal configuration for the plurality of uplink signals, and transmitting the plurality of uplink signals to a network within the range of the reduced maximum transmit power of the user equipment.

Method and apparatus for controlling transmit power

The present invention is directed to a wireless communication system, more specifically, a transmitter used for wireless communication and a method for the same. The transmitter used for wireless communication comprises a plurality of transmitting antennas; a plurality of radio frequency (RF) chains configured for each of the transmitting antennas; a signal generator generating one or more transmitting signals at a base band; and an RF switch mapping the one or more transmitting signals into the plurality of RF chains.

Transmitter having multiple antennas

An apparatus and method for recording data on an optical disc, are discussed. In an embodiment of the present invention, when recording of real-time input data in a high quality mode is requested, an Optimum Power Control (OPC) operation for recording is performed while input data is encoded in a quality mode, which is downwardly adjusted, for example, to a standard quality mode, and is then buffered in a buffer memory. After the OPC operation has been completed, the buffered data is recorded on the optical disc while the data is encoded in the requested high quality mode and is then buffered. Further, the input data is encoded in the requested high quality mode, but may be buffered in a hard disc, rather than the buffer memory, during the performance of the OPC operation.

Method and apparatus for recording data on optical disc

A method and apparatus for recording data on an optical disk calculates an optical power at a first recording speed, compares the calculated optical power to a predetermined value, and then determines whether to apply the first recording speed based on a result of the comparison. The optical power at the first recording speed is calculated based on a reference optical power and a measured optical power, and the predetermined value may correspond to the maximum allowable power of a laser pickup. The method and apparatus may be used to control the speeding, timing, and/power of a data recording operation, as well as to compensate for temperature variations and/or power margins of one or more circuits in an optical disk device.

Method and apparatus for recording data in an optical disk device

A method and apparatus of controlling an optical disk apparatus determines a reference recording power at each of a plurality of recording speeds for an inserted optical disk, performs a power control procedure for a prescribed recording speed to determine a recording power at the prescribed recording speed in response to a recording request, and then computes a recording power at each of the recording speeds based on the reference recording power and the recording power determined at the prescribed recording speed. The power control procedure is performed only for an inner circumferential area of the disk, irrespective of whether a requested recording speed is less than or greater than the prescribed recording speed. As a result, the speed of the data recording operation may be substantially improved and/or other improvements may be realized.

Method and apparatus for adjusting recording power for optical disk device

Embodiments of methods and apparatus for compensating writing power in an optical disc device can compensate selected (e.g., OPC) writing power. When a writing operation is temporarily suspended (e.g., buffer under-run) during the writing operation, writing power is compensated in real time on the basis of the &#x3b2; value detected from read RF signals for most recently recorded data and comparisons to selected writing power (e.g., optimum &#x3b2; value stored therein through OPC).

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Anyang-si, South Korea

Man Young Jung