摘要:
A method for transmitting data in an Orthogonal Frequency Division Multiple Access (OFDMA) system. The data transmission method includes determining a number of diversity tiles, each of which includes physically separated frequency resources; dividing an entire system band into diversity subbands including the diversity tiles and localized subbands including localized tiles, each of which includes physically adjacent frequency resources, when the determined number of diversity tiles is greater than a threshold; uniformly distributing the diversity tiles over the entire system band, and disposing the localized tiles in the remaining bands except for the diversity tiles, when the determined number of diversity tiles is not greater than the threshold; and transmitting data to multiple terminals over the configured diversity tiles and localized tiles using diversity transmission and localized transmission schemes.
摘要:
A method and apparatus using Virtual Circuit Switching (VCS) in a new scheme are provided for allocating and employing resources by combining Circuit Switching (CS) and Packet Switching (PS), in which a base station allocates resources of a dedicated channel using the CS to a user and then transmits data on the dedicated channel. When data is not transmitted to the user, the base station allocates the allocated dedicated channel resources for resources of a shared channel and transmits data of a different user. Therefore, system capacity can be increased and a waste of communication resources can be minimized in a wireless communication system for frequently transmitting a small amount of traffic that is sensitive to a delay time.
摘要:
A mobile station apparatus for determining reverse transmission power in an Orthogonal Frequency Division Multiplexing system is provided. A reception module receives from a base station a Reverse-Link Assignment Message including a Packet Format (PF) field and a Reverse-Link Power Control (RLPC) field. A power level adjuster determines a nominal reverse transmission power level depending on information of the PF field, and determines a relative final transmission power level shifted by an offset value defined in the RLPC field from the nominal transmission power level.
摘要:
The present disclosure relates to an image comparison device using a personal video recorder, the device comprising: a display unit configured to output a reference image; at least one camera configured to obtain a comparison image by taking a picture of a present scene of a subject chasing a movement of an object included in the reference image while the reference image is displayed on the screen of the display unit; and a controller configured to display the comparison image along with the reference image on the screen, and a method using the image comparison device.
摘要:
A method and apparatus using Virtual Circuit Switching (VCS) in a new scheme are provided for allocating and employing resources by combining Circuit Switching (CS) and Packet Switching (PS), in which a base station allocates resources of a dedicated channel using the CS to a user and then transmits data on the dedicated channel. When data is not transmitted to the user, the base station allocates the allocated dedicated channel resources for resources of a shared channel and transmits data of a different user. Therefore, system capacity can be increased and a waste of communication resources can be minimized in a wireless communication system for frequently transmitting a small amount of traffic that is sensitive to a delay time.
摘要:
Disclosed is a method and an apparatus for efficient ACKnowledgment/NonACKnowledgement (ACK/NACK) transmission in order to transmit forward data for multiple layers and support Hybrid Automatic Retransmission reQuest (HARQ) for each layer in a mobile communication system. The method includes determining whether transmission of the ACK/NACK is for a first layer or for layers higher than the first layer; and when the transmission of the ACK/NACK is for layers higher than the first layer, transmitting the reverse ACK/NACK by allocating resources to the higher layers with a quantity different from that of the first layer.
摘要:
A mobile station apparatus for determining reverse transmission power in an Orthogonal Frequency Division Multiplexing system is provided. A reception module receives from a base station a Reverse-Link Assignment Message including a Packet Format (PF) field and a Reverse-Link Power Control (RLPC) field. A power level adjuster determines a nominal reverse transmission power level depending on information of the PF field, and determines a relative final transmission power level shifted by an offset value defined in the RLPC field from the nominal transmission power level.
摘要:
A method and apparatus for hopping of a Code Division Multiple Access (CDMA) control segment that carries control information in an Orthogonal Frequency Division Multiple Access (OFDMA) packet data mobile communication system are provided, in which a number of CDMA control segment hopping zones, each CDMA control segment hopping zone representing a frequency area for CDMA control segment hopping, is determined according to a total number of available tiles in the system and a number of tiles per CDMA control segment, each tile including a predetermined number of subcarriers, or according to a total number of available subcarriers in the system and a number of subcarriers per CDMA control segment. Start points of the hopping zones are determined using the number of the hopping zones, and the control information is transmitted or received in the CDMA control segment through hopping of the CDMA control segment over the hopping zones using the start points.
摘要:
Disclosed is a method and an apparatus for efficient ACKnowledgment/NonACKnowledgement (ACK/NACK) transmission in order to transmit forward data for multiple layers and support Hybrid Automatic Retransmission reQuest (HARQ) for each layer in a mobile communication system. The method includes determining whether transmission of the ACK/NACK is for a first layer or for layers higher than the first layer; and when the transmission of the ACK/NACK is for layers higher than the first layer, transmitting the reverse ACK/NACK by allocating resources to the higher layers with a quantity different from that of the first layer.
摘要:
Provided is a method for transmitting feedback information by a receiver in a mobile communication system that performs multiplexing transmission using array antennas. The method includes determining a weight set for maximizing a data rate among at least one weight set having, as its elements, multiple orthonormal weight vectors, based on a fading channel estimated from a pilot channel of received data; estimating channel state information corresponding to a weight vector of the determined weight set; and generating and transmitting feedback information including an index of the determined weight set, the selected weight vector information, and the channel state information corresponding to the weight vector.