摘要:
A multilayer structure including a first electron supply layer and a second electron supply layer is used for an electron supply layer. A multilayer structure including an SiN film and an SiO2 film is used for an insulating film to be formed on the surface of a semiconductor. In forming an opening for exposing the electron supply layer in the insulating film, the SiN film that is in contact with the semiconductor is side-etched. Accordingly, it is possible to avoid a contact between a gate electrode and a portion, which is located on the side of the electron supply layer, of the inner peripheral surface of the opening, and further to expose only the second electron supply layer in the vicinity of the gate electrode.
摘要:
A semiconductor device which includes both an E-FET and a D-FET and can facilitate control of the Vth in an E-FET and suppress a decrease in the Vf, and a manufacturing method of the same are provided. A semiconductor device which includes both an E-FET and a D-FET on the same semiconductor substrate includes: a first threshold adjustment layer for adjusting threshold of the E-FET; a first etching stopper layer formed on the first threshold adjustment layer; the second threshold adjustment layer formed on the first etching stopper layer for adjusting threshold of the D-FET; a second etching stopper layer formed on the second threshold adjustment layer; a first gate electrode penetrating through the first etching stopper layer, the second threshold adjustment layer, and the second etching stopper layer, which is in contact with the first threshold adjustment layer; and the second gate electrode penetrating through the second etching stopper layer, which is in contact with the second threshold adjustment layer.
摘要:
Provided is a terminal apparatus in which, a transmission control unit (204) controls the transmission power of a sounding reference signal (SRS) by use of an offset value relative to the transmission power of a data signal, and a transmission unit (206) transmits the SRS by use of the transmission power as controlled. If a subframe to be used for transmitting the SRS is a predetermined subframe, the transmission control unit (204) uses a first offset value to control the transmission power of the SRS. Otherwise, the transmission control unit (204) uses a second offset value to control the transmission power of the SRS. The second offset value is an offset value that has been established so as to be transmitted to the serving cell of the terminal (200), and the first offset value is greater than the second offset value.
摘要:
The objective of the present invention is to provide a terminal device capable of suppressing delay in switching between transmit/receive points, and of reliably switching between the transmit/receive points. In the device, a reception processing unit (203) receives control information including a transmission request for an A-SRS and a report request for a downlink CSI, whereupon a transmission signal formation unit (207) transmits the A-SRS at a transmission power set on the basis of the report request. In addition, if a report for each downlink CSI between a plurality of base stations is requested in the report request, the transmission signal formation unit (207) transmits the A-SRS at a first transmission power, whereas if a report for a downlink CSI between a single cell is requested in the report request, the A-SRS is transmitted at a second transmission power. The first transmission power is greater than the second transmission power.
摘要:
A relay station to which network sharing is applied, wherein it is possible to appropriately allocate between multiple operators a shared band frequency shared by the multiple operators, and to improve the frequency use efficiency. In a relay station (100), a band frequency allocation determination unit (107) determines the bandwidth for each operator within a shared band frequency, which is shared by multiple operators and used between the relay station (100) and a mobile station, on the basis of the quality of a first line between the relay station (100) and the base stations of the operators and on the basis of the status of a second line between the relay station (100) and the mobile stations of the operators. A signal generation unit (108) allocates the signal of the operators to a resource on the basis of the bandwidth for each operator in the shared band frequency.
摘要:
Provided are a base station, whereby the erroneous detection of control information can be reduced, thereby preventing the degradation of the system throughput. A base station (100) maps a downstream allocation control information unit, which is addressed to a terminal (200), to a first resource region, which can be used for any of a downstream control channel region and a downstream data channel region, or to a second resource region, which can be used only for the downstream control channel, so as to transmit the downstream allocation control information unit. In the base station (100), a control unit (102) establishes a scale of the PDCCH region, and a transmission region establishing unit (131) establishes, on the basis of a scale value established by the control unit (102), a mapping region to which the DCI is mapped within the R-PDCCH region and the PDCCH region.
摘要:
A scheduling apparatus and a scheduling method, wherein the amount of signaling for frequency resource allocation information can be reduced while maintaining system throughput performance. In a base station apparatus (100), a scheduling section (113) allocates frequency resources to frequency allocation target terminals based on set frequency allocation units, and a frequency allocation parameter setting section (112) adjusts the set frequency allocation units set in the scheduling section (113) based on cluster numbers. Due to this, in each cluster number, frequency resources can be allocated based on the most suitable frequency allocation units with respect to the signaling bit number. As a result, the amount of signaling for frequency resource allocation information can be reduced. Further, system throughput can be maintained by making the cluster number, which is a parameter having little effect on system throughput, a setting parameter for frequency allocation units.
摘要:
Disclosed is a base station which can prevent degradation in the reception characteristics of nearby cells when carrier aggregation and channel selection are applied. In accordance with the resistance to interference of a plurality of uplink component carriers of a femtocell, a response protocol controller (101) in a base station (100) changes combination rules for the uplink component carriers and signal points which a terminal (200) in a microcell covered by the base station (100) uses in the feedback of a response signal. Information in relation to the combination rules is notified to the terminal (200). A controller (217) in the terminal (200) changes the combination rules for the uplink component carriers and the signal points of the microcell covered by the base station (100) in accordance with the information notified from the base station (100), and controls transmission of the response signal in accordance with said rules.
摘要:
A radio transmission apparatus performs communications with high transmission efficiency. In this apparatus, a modulator modulates data and outputs to a first spreader. A second modulator modulates data under a modulation scheme having a higher M-ary number than the first modulator and outputs the modulated data to a second spreader. The first spreader spreads the data and outputs the spread data to a frequency domain mapping section. The second spreader spreads the data and outputs the spread data to a time domain mapping section. A frequency domain mapping section maps chips with spread data on subcarriers in the frequency domain and outputs the data with chips mapped on subcarriers to an IFFT section. The time domain mapping section maps chips with spread data on subcarriers in the time domain and outputs the data with chips mapped on subcarriers to the IFFT section.
摘要:
Provided are a base station, a mobile station, a method for transmitting calculation parameters for a power headroom and a method for transmitting a power headroom capable of increasing the accuracy of link adaptation by reducing the probability that a power headroom value is out of a reported range. In a base station (100), a PHR bandwidth notifier (105) determines a bandwidth for power headroom calculation to be used for calculating a power headroom by a mobile station (200) for a component carrier to which an unlink allocation signal (UL grant) is not mapped and generates a notification signal containing information on the determined bandwidth for power headroom calculation, and a transmitting means (modulator (106), transmission RF unit (107)) transmits the generated notification signal to the mobile station (200). Specifically, the PHR bandwidth notifier (105) determines a bandwidth for PHR calculation according to an estimated path-loss level.