7 results about "Radio Base Station" patented technology

A mobile communication system with a packet switching function which enables sharing of radio resources among mobile stations, wherein a mobile station which has generated a request for communication quality assurance periodically sends a packet for requesting preferential use of a radio channel in order to prevent timeout of the state transition timer, timeout of which would cancel radio channel assignment to the mobile station and bring it into a dormant state if a certain period elapses without transmission or reception of a signal, so that it can remain in the active state and hold the radio channel continuously. In addition, when the mobile station requesting communication quality assurance moves from one cell to another or requests radio channel assignment, the base station controller controls the radio base station so that the mobile station can be assigned a radio channel by sending a priority request packet.

To provide remedies when the quality of a radio link in a Ud interface is deteriorated. In a mobile communication method according to the present invention, a first communication state in which transmission/reception of a data signal is performed between a mobile station UE#1 and a mobile station UE#2 through a radio link in a Ud interface set between the mobile station UE#1 and the mobile station UE#2 without through a radio link in a Uu interface set between a mobile station and a radio base station eNB, and a second communication state in which transmission/reception of a data signal is performed between the mobile station UE#1 and the mobile station UE#2 through the radio link in the Uu interface can be switched. When the mobile station UE#1 detects RLF in the Ud interface in the first communication state, the mobile station UE#1 transits to the second communication state.

Phase and amplitude deviations, which are generated, for example, by cables connecting an array antenna of a CDMA base station and the base station, are calibrated in the baseband.

The base station comprises: an antenna apparatus 1; couplers 2; an RF unit 3 that converts a receive signal to a baseband signal, converts a transmit signal to a radio frequency, and performs power control; an A/D converter 4 for converting a receive signal to a digital signal; a receive beam form unit 6 that multiplies the receive signal by semi-fixed weight; a despreader 7 for this signal input; a time-space demodulator 8 for demodulating user data; a despreader 9 for probe signal; a space modulator 14 for user data; a spreader 13 for user signal; a channel combiner 12; a Tx calibrater 11 for controlling calibration of a signal; a D/A converter 10; a unit 16 for calculation of correlation matrix for generating a probe signal used for controlling an Rx calibration system and a TX calibration system; a spreader 17 for probe signal; a power control unit 18; a D/A converter 19; an RF unit 20 for probe signal; an A/D converter 21 for signal from the couplers 2; and a despreader 22.

A radio base station is disclosed including a first communication device that supports a cell; and a second communication device that is connected to the first communication device and controls the first communication device, wherein the second communication device transmits system information including a reference system frame number and a reference time associated with the reference system frame number to the first communication device, and the first communication device broadcasts the system information. In other aspects, a radio communication method and a radio communication system are also disclosed.