A spindle motor having a rotor R and a stator S. The stator S comprises a stator housing 80, a first bearing 82, a second bearing 84, a stator yoke 86, and a drive coil 88. The first bearing 82 is held in the stator housing 80 and supports a shaft 60, allowing the shaft 60 to rotate. The second bearing 84 provided between the stator housing 80 and a rotor housing 50, arranged concentric to the first bearing 82 in a radial direction, and supporting a rotor R, allowing the rotor R to rotate. The s...

Embodiments of the present invention include a method for performing joint time synchronization and carrier frequency offset estimation in a wireless communication system, comprising steps of: on a transmitter: performing frequency domain spreading and interleaving on input data by using a predetermined spreading factor (SF) to generate a frequency domain training symbol; performing Inverse Discrete Fourier Transformation (IDFT) on the generated frequency domain training symbol to generate a fir...

The present invention allows transmission power control for each packet without increasing overhead and control processing delay in communications control systems such as CDMA systems, thereby increasing the quality of transmission. The present invention provides a communications control system for controlling packet communications between a base station and a mobile station, including a determiner for determining the transmission power level of packet data based on the received intensity of a p...

A printer/processor for performing printing processes on both piece negatives taken out of a negative sheet and an elongate negative film. This printer/processor includes a negative sheet loader (2a) for receiving the negative sheet (10) containing the piece negatives (NP), a handling device (6) for drawing the piece negatives out of the negative sheet, an elongate negative film inlet (2c) for receiving the elongate negative film NF, a transport line (130) extending to an exposing section (110),...

A data communication method is provided by the present invention for carrying out a radio communication by intermingling circuit-switched communication and packet-switched communication using the TDMA communication mode between a radio base station and multiple radio terminals. An idle slot among slots for traffic channel is assigned for a generated circuit-switched data in order, and an idle slot among slots for control channel that belongs to a frame wherein a control signal is not transmitted...

The object of the present invention is to provide a transmission power control method which enables the resolution of problems in a first control method for keeping the received power of packet signals in upstream radio channels constant and a second control method for keeping the SIR constant. The present invention relates to the transmission power control method for controlling the transmission power control of packet signals transmitted from a mobile station 30 via an upstream radio channel. ...

In a mobile communication system for carrying out packet transmission/reception between a mobile terminal having a power saving mode to reduce a power consumption and a radio base station, a packet type of a packet is judged, and a sleep timer value indicating a time duration since a last packet is transmitted/received until the power saving mode starts is set according to a judgement result. Then, at least one sleep timer for measuring an elapsed time since the packet is transmitted/received is...

Provided is a resource allocating method capable of ensuring QoS according to priority levels and efficiently allocating resources. A resource allocating method according to the present invention is a resource allocating method in a radio packet communication system for letting a base station allocate a necessary resource to communication with a mobile station, which has a reservation signal transmitting step wherein the mobile station transmits a reservation signal containing priority level inf...

A base station includes: an acquisition unit for acquiring a quantity of stored packets from a mobile station, the quantity of stored packets being stored in a buffer for storing the packets transmitted by the mobile station; a radio resource controller for allocating priority radio resources preferentially usable by the mobile station to a radio channel for the mobile station, and for allocating usable radio resources allowed to be used by the mobile station from the priority radio resources to...

In a disclosed mobile communications system wherein packet communication between a base station and its subordinated mobile station is established based on a reservation packet, the packet communication uses controlled transmission power and a radio resource allocated based on reception quality information received from the mobile station. The base station comprises a memory for storing its own cell reception power transmitted from the mobile station based on radio resource allocation status for...