摘要:
A radio communication system includes a radio network controller, base stations and mobile stations. The mobile station includes a response signal transmitter which is configured to transmit a response signal including a group ID identifying a multicast group A to a base station. The response signal responds to a control signal for the multicast group A which the mobile station is joining in. The base station includes a response signal transmitter configured to transmit at least one response signal to the radio network controller. The response signal is selected from at least one response signal transmitted from the mobile station joining in the same multicast group A.
摘要:
The object of the present invention is to provide a base station 10, a mobile station 11 and a radio network controller 50 which can reduce the load on the radio network controller 50 during multicast communication. The base station 10 supporting multicast communication comprises a response signal relay 10b configured to transfer response signals transmitted from a plurality of mobile stations 11, 12, 21, 41, 42 to a radio network controller 50. The response signals respond to a control signal for a multicast group. The response signal relay 10b transfers only a predetermined number of response signals to the radio network controller 50. Any following response signals are retained.
摘要:
Disclosed is a mobile communication system whereby, to reduce the connection time, a mobile station closely located to a base wireless station is permitted to continue to use a common channel for exchanging signals, and to suppress an increase in interference, an individual channel is set for a mobile station located near the edge of a cell, and to obtain a stabilized communication quality and to prevent an increase in the connection time, the probability that the transmission power will reach an upper limit is reduced. When communication between a mobile station and a wireless base station is started, the wireless base station measures the transmission power and the communication quality in the communication with the mobile station and the utilization ratio for a common channel, and compares the obtained values with predetermined threshold values. When the obtained values are lower than the threshold values, the wireless base station continues to use the common channel for signal transmission/reception. On the other hand, when the obtained values exceed the threshold values, the wireless base station sets an individual channel and sets a wireless channel so as to be capable of the continued use of the individual channel for the exchange of signals.
摘要:
An apparatus for angular positioning of a mirror includes a motor that rotates a mirror, a detector that detects a rotational angle of the mirror, and a controller. The controller supplies current to the motor so that the rotational angle of the mirror reaches a target angle, estimates, based on a model representing a relation between a value of current to be supplied to the motor and an angle of inclination of the mirror, the angle of inclination of the mirror to which current is supplied, and if the estimated angle exceeds a predetermined tolerance, adjusts the supply of current to the motor so that the angle of inclination of the mirror falls within the predetermined tolerance.
摘要:
A liquid crystal display device is provided and includes: a liquid crystal cell including a pair of transparent glass substrates each having a transparent electrode, and a nematic liquid crystal between the pair of the transparent glass substrates; and a pair of polarizing plates sandwiching the liquid crystal cell. At least one of the pair of polarizing plates includes a protective film; a polarizer; and an optical compensation film. One of the pair of transparent glass substrates, an, adhesive; the optical compensation film; the polarizer; and the protective film are stacked in this order, and they satisfy the following equations (1) to (3): |n1−n2|≦0.03 (1) |n2−n3|≦0.03 (2) |n1−n3|≦0.03 (3) where n1, n2, and n3 indicate average refractive indices at 589 nm of the one of the pair of the transparent glass electrodes, the adhesive; and the optical compensation film, respectively.
摘要:
In a mobile communication system 1 comprising a control station 204, a base station 201, and a mobile station 202, in which the control station 204 sets a dedicated channel with the mobile station 202 via the base station 201, the control station 204 comprises dedicated channel control means for performing a dedicated channel retention operation in which a second dedicated channel, which is different to a first dedicated channel, is set during communication through the first dedicated channel in such a manner that both the first and second dedicated channels are retained for a predetermined time period after the second dedicated channel is set.
摘要:
Disclosed is a frequency shifter for shifting a frequency of incident light beams. The frequency shifter has an electro-optic element for making incident the light beam whose frequency is to be shifted, an electrode unit disposed on the electro-optic element, an electric charge imparting circuit for imparting an electric charge to the electrode unit and a discharging circuit for discharging the electric charges accumulated in the electrode unit. Disclosed also is an apparatus, having the frequency shifter, for optically measuring relative displacement data to a measured object.
摘要:
A reducer and a method for conducting dot etching processing using the reducer, the reducer comprising (1) an amino polycarboxylic acid ferric chelate compound having an oxidation-reduction potential of -100 mV or above, (2) a complexing agent, and (3) at least one member of the compounds represented by the following general formulae (IA) to (VIIA). ##STR1## All symbols are defined in the specification.
摘要:
The present invention relates to a method for continuously processing a color reversal photographic material. After black and white development, the color reversal photographic material is rinsed in a bath wherein the replenishing amount per unit area of the photographic material is 3 to 50 times as much as the amount of processing solution carried over from the preceding bath in terms of volume ratio and the pH is 9.5 or below.
摘要:
A cephem derivative represented by the general formula ##STR1## wherein R.sup.1 represents hydrogen or methyl, R.sup.2 represents carboxyl or esterified carboxyl, and n represents 0 or 1, or a pharmaceutically acceptable salt thereof; intermediates for the cephem derivative or salt thereof; processes for producing these compounds; and a pharmaceutical composition and method for preventing or treating bacterial infectious diseases, wherein the cephem derivative or the salt thereof is used.