摘要:
Disclosed are a wireless communication base station and a total transmission power regulating method that reduce interference to macrocell users near a femtocell and interference to neighboring femtocell users near the femtocell in a balanced manner, while ensuring throughput of the femtocell users. A reception power measuring unit (214) measures the reception power of a CPICH. A cell type discriminating unit (216) judges whether the received signal is a signal from a macro base station or a signal from a femto base station. When a signal from a macro base station is received, a total downlink transmission power setting unit (217) executes a first-stage interference regulation based on the strongest CPICH reception power value and calculates a tentative value for the total downlink transmission power of a femto base station (110). When a signal from a peripheral femto base station is received, the total downlink transmission power setting unit (217) executes a second-stage interference regulation within a fixed power regulation range for the second-stage interference regulation based on the strongest CPICH reception power value, and calculates a final total downlink transmission power value.
摘要:
A mobile terminal device for performing multi-carrier communication with a base station device can improve communication quality while reducing the data amount without lowering accuracy of feedback information. In the mobile station device (100), a reception level measuring unit (135) measuring SINR as a reception level for each chunk formed by a plurality of sub-carriers according to a known signal; a control information transmission control unit (160) transmits feedback information (CQI information) based on the communication quality of each chunk to a base station device (200); a relative value calculation unit (150) calculates a relative value of MCS corresponding to the reception level between adjacent chunks from the reception level of each chunk; and a CQI information generation unit (155) generates feedback information (CQI information) from an absolute value of MCS corresponding to the reception level of the reference chunk and a relative value of MCS corresponding to the reception level between the adjacent chunks.
摘要:
A transmission apparatus capable of preventing both degrading of the error rate characteristic and deterioration of throughput caused by repeated retransmissions. In the apparatus, arrangement determination section 103 determines in an initial transmission to perform general constellation mapping, and determines in a retransmission to vary a constellation mapping position or vary a bit arrangement of each symbol according to the number of retransmissions. Data interchanging section 105 interchanges transmission data for each bit on a symbol basis to be in a bit arrangement determined by arrangement determining section 103. Mapper section 106 configures (maps) the transmission data input from data interchanging section 105 in each symbol to be mapped in the constellation mapping position determined in arrangement determining section 103.
摘要:
A mobile station device for selecting a TPC command to improve the transmission quality of a packet in an upstream circuit more reliably, so that it reduces the re-transmission in the upstream circuit to improve a sector throughput. In this mobile station device, a demodulate unit (210) outputs a received signal of each base station device to an error correction decode unit (220) and a TPC command select unit (240). The error correction decode unit (220) outputs an ACK/NACK of each base station device to a data re-transmission control unit (230) and the TPC command select unit (240). The TPC command select unit (240) selects the TPC command of the highest priority on the basis of the information of the ACK/NACK. A transmission power control unit (280) determines the transmission power according to the contents of the TPC command of the highest priority. Moreover, the transmission power control unit (280) determines the transmission power by an or-of-down method, in case a plurality of TPC commands of the highest priority are outputted from the TPC command select unit (240).
摘要:
A mobile station apparatus selects an appropriate one of transmission rate instruction commands received from base station apparatuses to reduce the interference of the whole system and improve the sector throughput. In this mobile station apparatus (200), a demodulating section (210) outputs a received signal of each base station apparatus to an error correction decoding section (220), which then outputs the ACK/NACK and instruction command of each base station apparatus to a transmission rate control section (240), which then selects, based on the ACK/NACK information, from among the instruction commands received from the base station apparatuses, the instruction command that should be employed on a priority basis during an actual transmission rate control and that is received from a base station apparatus having a highest priority.
摘要:
Provided are an interference-control method and femto base station whereby inter-cell interference between a femtocell and a macrocell is decreased without a loss in throughput or coverage of the femto base station. A nearby-macro-terminal detection unit (306) in the femto base station (103) detects whether there are any macro terminals (102) within communication range of the femto base station (103) that are not registered with the femto base station (103). If a macro terminal (102) is detected, an interference-control unit (307) controls interference by either decreasing the total transmission power of the femto base station (103) or allocating, to femto terminals (104) registered with the femto base station (103), frequencies that differ from the frequency used by the macro base station (101) .
摘要:
A radio communication apparatus and an associated method are provided. The apparatus includes a receiving unit configured to receive first data and second data, which are transmitted from a plurality of antennas for spatial-multiplexing using a plurality of blocks, into which a plurality of consecutive subcarriers in a frequency domain are divided. The apparatus further includes a calculating unit configured to calculate a first absolute CQI value per each of the blocks for the first data and a second absolute CQI value per each of the blocks for the second data, and calculate a relative value of the second absolute CQI value with respect to the first absolute CQI value, per each of the blocks. The apparatus still further includes a transmitting unit configured to transmit the first absolute CQI value and the relative value of the second absolute CQI value in the same block.
摘要:
Disclosed are a wireless communication base station and a total transmission power regulating method that reduce interference to macrocell users near a femtocell and interference to neighboring femtocell users near the femtocell in a balanced manner, while ensuring throughput of the femtocell users. A reception power measuring unit (214) measures the reception power of a CPICH. A cell type discriminating unit (216) judges whether the received signal is a signal from a macro base station or a signal from a femto base station. When a signal from a macro base station is received, a total downlink transmission power setting unit (217) executes a first-stage interference regulation based on the strongest CPICH reception power value and calculates a tentative value for the total downlink transmission power of a femto base station (110). When a signal from a peripheral femto base station is received, the total downlink transmission power setting unit (217) executes a second-stage interference regulation within a fixed power regulation range for the second-stage interference regulation based on the strongest CPICH reception power value, and calculates a final total downlink transmission power value.
摘要:
A MIMO receiver apparatus and a MIMO transmitter apparatus capable of reducing the feedback information amount to reduce the system traffics. A wireless communication apparatus (100) at a receiving end comprises a reception level determining part (130) that uses pilot signals transmitted from the antennas of a wireless communication apparatus (200) at a transmitting end to determine a communication quality (e.g., SINR) for each of the antennas (corresponding to substreams); a transmitting part (170) that transmits feedback information based on the communication qualities to the transmitting end; a relative value calculating part (150) that calculates, from both the communication quality of a reference antenna (corresponding to a reference substream) selected from the antennas at the transmitting end and the communication qualities of the antennas other than the reference antenna, relative values of the other antennas relative to the reference antenna; and a feedback information generating part (160) that generates the feedback information from both the absolute value of the communication quality of the reference antenna and the forgoing relative values of the communication qualities.
摘要:
A transmission apparatus capable of preventing both degrading of the error rate characteristic and deterioration of throughput caused by repeated retransmissions. In the apparatus, arrangement determination section 103 determines in an initial transmission to perform general constellation mapping, and determines in a retransmission to vary a constellation mapping position or vary a bit arrangement of each symbol according to the number of retransmissions. Data interchanging section 105 interchanges transmission data for each bit on a symbol basis to be in a bit arrangement determined by arrangement determining section 103. Mapper section 106 configures (maps) the transmission data input from data interchanging section 105 in each symbol to be mapped in the constellation mapping position determined in arrangement determining section 103.