摘要:
If an unallocated PDSCH exists upon allocating downlink resource blocks to the radio terminal UE30-1, a radio base station eNB10-1 identifies a period corresponding to an area of the unallocated PDSCH (PDSCH unallocated period), and turns off a power amplifier 112 in the PDSCH unallocated period.
摘要:
A radio base station eNB#1 comprises: a storage unit 130 which stores a handover parameter for controlling handover, in association with location information indicating a location in a communication area of the radio base station eNB#1; and a controller 120 which detects handover failure and control the storage unit in such a way as to adjust the handover parameter associated with the location information indicating a failure-detected location being a location of a radio terminal of which the handover failure is detected.
摘要:
A radio base station eNB#1 comprises: a storage unit 130 configured to store a handover parameter for controlling handover of radio terminals, in association with moving velocity information indicating a moving velocity of a given radio terminal; and a controller 120 configured to detect handover failure and control the storage unit 120 to adjust the handover parameter associated with the moving velocity information indicating a failure-detected moving velocity being a moving velocity of a radio terminal to which the handover failure is detected.
摘要:
A macro-cell base station (MeNB) transmits, via a PDCCH in a first subframe, both allocation information indicating a radio resource allocated to a radio terminal (MUE) and subframe information indicating a second subframe which is later than the first subframe and in which an allocation is applied in accordance with the allocation information. The radio terminal (MUE) receives the allocation information and the subframe information from the macro-cell base station (MeNB) via the PDCCH in the first subframe. The macro-cell base station (MeNB) omits the transmission of the allocation information in the second subframe, while the reception unit on the terminal side omits the reception of the allocation information in the second subframe.
摘要:
A radio communication device according to the present invention adaptively controls directivity of a transmission radio signal by using a plurality of element antennas on the basis of a received radio signal received from a communication target counterpart radio communication device. The radio communication device includes a transmission controller configured to process the transmission radio signal according to a first control method for adaptively controlling the directivity, a propagation path state detector configured to detect fluctuation state of a propagation path to a counterpart radio communication device, and a judgment unit configured to judge whether or not to change the directivity on the basis of the fluctuation state of the propagation path. If it is judged that the directivity is to be changed, the transmission controller switches to a second control method that is different from the first control method, and processes the transmission radio signal according to the second control method.
摘要:
A radio communication system (1) is provided with a high-power base station (200), a radio terminal (300) which is located within a macro cell (C2) formed by the high-power base station (200), and a low-power base station (100) which has a lower transmission output power than the high-power base station (200). The low-power base station (100) sends, to the high-power base station (200), control information needed for the radio communication between the radio terminal (300) and the low-power base station (100); the high-power base station (200) sends, to the radio terminal (300), the control information received from the low-power base station (100); and the radio terminal (300) performs radio communication with the low-power base station (100) by using the control information received from the high-power base station (200).
摘要:
A radio base station includes: a propagation path characteristic acquisition unit which acquires propagation path characteristics between a radio communication terminal and a radio base station; and a channel controller which reports to the radio communication terminal that channel allocation information is transmitted by using a dedicated control channel if the acquired propagation characteristic satisfies a predetermined condition. After the channel control unit has reported to the radio communication terminal that the channel allocation information is transmitted by using an dedicated control channel, the channel control unit and a MAP processing unit transmit the channel allocation information by using an dedicated control channel instead of a broadcast control channel in the downstream frame.
摘要:
A radio communication device according to the present invention is a radio communication device which adaptively controls directivity of transmission radio signals by use of a plurality of element antennas on the basis of received radio signals received from a counterpart radio communication device that is a communication target radio communication device, the transmission radio signals being to be transmitted to the counterpart radio communication device, the radio communication device comprising: a propagation path state detector configured to detect a fluctuation state of a propagation path to the counterpart radio communication device on the basis of the received radio signal; and a transmission controller configured to control a phase of the transmission radio signal on the basis of the fluctuation state of the propagation path detected by the propagation path state detector.
摘要:
A radio communication device according to the present invention adaptively controls directivity of a transmission radio signal by using a plurality of element antennas on the basis of a received radio signal received from a communication target counterpart radio communication device. The radio communication device includes a transmission controller configured to process the transmission radio signal according to a first control method for adaptively controlling the directivity, a propagation path state detector configured to detect fluctuation state of a propagation path to a counterpart radio communication device, and a judgment unit configured to judge whether or not to change the directivity on the basis of the fluctuation state of the propagation path. If it is judged that the directivity is to be changed, the transmission controller switches to a second control method that is different from the first control method, and processes the transmission radio signal according to the second control method.
摘要:
A radio base station 100 includes fading rate measurement units 103a to 103n configured to measure a fading rate of a radio signal for each of the antenna elements 101a to 101n, the radio signal being received through the antenna elements; and a reference signal calculator 105 configured to output a reference signal used in an adaptive control of the directivity of the array antenna 101. The reference signal calculator 105 outputs the reference signal on the basis of a plurality of fading rates measured by the fading rate measurement units 103a to 103n.