Abstract:
A wireless control apparatus is disclosed that forms and controls an area of a base station according to an antenna pattern. The wireless control apparatus includes an area formation information gathering part that gathers area formation information pertaining to area formation of a neighboring base station; and an antenna pattern control part that controls and directs at least one of a main lobe, a side lobe, and a null point between the main lobe and the side lobe of the antenna pattern based on the area formation information to reduce frequency interference between a current cell formed by a current base station and a neighboring cell formed by the neighboring base station.
Abstract:
A pneumatic tire as a slick tire comprising at least one wear indication hole within a contact width of a tread portion, wherein a distance from a shoulder contact end to the wear indication hole is set equal to 35 mm or lower; and a projected line is provided in a surface of the tread portion, the projected line having a height set in a range of 0.1 to 1.0 mm, and being extended from a position in contact with the wear indication hole to a shoulder side. Also, a metallic mold used for building the slick tire.
Abstract:
A pneumatic bias tire including a two-ply carcass layer comprising an inner carcass ply and an outer carcass ply, which respectively comprise cords of an aromatic polyamide fiber and cords of nylon, the cords of the inner carcass ply crossing the cords of the outer carcass ply, the outer carcass ply having a cord angle .beta. to the circumferential direction of the tire which is smaller than a cord angle .alpha. of the inner carcass ply to the tire circumferential direction.
Abstract:
An A/D conversion method including the steps of storing digital voltage values obtained through an A/D conversion of divided voltages obtained by dividing an analog voltage in a predetermined voltage range into a predetermined number of different dividing ratios by an A/D converter and digital data for calculating digital output data for the A/D conversion of an input voltage in combination with the digital voltage values in a memory, converting the input voltage into a corresponding digital input value through A/D conversion, deciding upon a voltage division including the digital input value among divisions demarcated by the digital voltage values by sequentially comparing the digital voltage values with the digital input value, deciding which of a pair of the digital voltage values demarcating the division selected through the prior decision is the approximate value of the digital input value, updating the divided voltage corresponding to the digital voltage value through A/D conversion to provide a representative demarcating value, deciding upon a division including the digital input value by comparing the updated representative demarcating value and the digital input value to update one of the divided voltages corresponding to one of the demarcating values paired with the representative demarcating value through A/D conversion and providing a digital signal corresponding to a digital output value through linear interpolation on the basis of the digital input value, the updated demarcating value, and an appropriate data corresponding to the updated demarcating value of the selected division among the digital data and an A/D converter utilizing the above method.
Abstract:
A disclosed base station includes a communication unit configured to receive from a mobile station a first report signal including base station specification information specifying a base station, reception quality information indicating reception quality of a signal received from the specified base station, and change request information requesting to change communication quality between the mobile station and the specified base station; and an automatic area control unit configured to determine whether the base station is specified by the base station specification information, to obtain location information indicating the location of the mobile station if the base station is specified by the base station specification information, and to change at least one base station parameter based on the reception quality information and the location information to change the reception quality at the location of the mobile station.
Abstract:
A mobile communications system is disclosed. The mobile communications system includes a first unit, provided at a base station apparatus, which controls a base station status by determining a request from an upper-layer general base station apparatus; and a second unit, provided at the general base station apparatus, which monitors for one or more mobile station apparatuses entering into/appearing in, or exiting/disappearing from a cell formed by the general base station apparatus, and, if at least one of the mobile station apparatuses enters into/appears in the cell formed by the general base station apparatus, requests for changing the base station apparatus to a service status, and, if all of the mobile station apparatuses exit/disappear from the cell formed by the general base station apparatus, requests for changing the base station apparatus to a radio unit stop status.
Abstract:
A wireless control apparatus is disclosed that forms and controls an area of a base station according to an antenna pattern. The wireless control apparatus includes an area formation information gathering part that gathers area formation information pertaining to area formation of a neighboring base station; and an antenna pattern control part that controls and directs at least one of a main lobe, a side lobe, and a null point between the main lobe and the side lobe of the antenna pattern based on the area formation information to reduce frequency interference between a current cell formed by a current base station and a neighboring cell formed by the neighboring base station.
Abstract:
A mobile communications system is disclosed. The mobile communications system includes a first unit, provided at a base station apparatus, which controls a base station status by determining a request from an upper-layer general base station apparatus; and a second unit, provided at the general base station apparatus, which monitors for one or more mobile station apparatuses entering into/appearing in, or exiting/disappearing from a cell formed by the general base station apparatus, and, if at least one of the mobile station apparatuses enters into/appears in the cell formed by the general base station apparatus, requests for changing the base station apparatus to a service status, and, if all of the mobile station apparatuses exit/disappear from the cell formed by the general base station apparatus, requests for changing the base station apparatus to a radio unit stop status.
Abstract:
A disclosed base station apparatus in a mobile communication system includes a receiving unit receiving a random access channel transmitted from a mobile station apparatus, an acquisition unit acquiring random access channel quality based on a measurement of the received random access channel or a report from the mobile station apparatus, a calculation unit calculating random access channel parameters based on the acquired random access channel quality, and a broadcast unit broadcasting the calculated random access channel parameters to all the mobile stations within a coverage area of the base station.
Abstract:
A base station and a scrambling code setting method of automatically setting up a scrambling code, the base station including a scrambling code setting unit for setting up a base station identifier and a provisional downlink scrambling code that is provisionally assigned; and a transmitting unit for spectrum-spreading the base station identifier by the provisional scrambling code, and for transmitting the base station identifier; wherein the scrambling code setting unit assigns a lasting downlink scrambling code based on a report concerning reception of the base station identifier.