Nec Corporation

Kanada Nakayasu

Shigeru Otsuka

Kohei Izui

To enable avoidance of termination of wireless connection between a base station and a terminal apparatus. A first base station (a base stationA) comprises: an acquisition unitconfigured to acquire mobility information on a terminal apparatus, the mobility information corresponding to information related to a beam formed for wireless communication with the terminal apparatus; and a control unitconfigured to control processing related to handover for the terminal apparatus, based on the mobility information on the terminal apparatus

First base station, method, and non-transitory computer readable medium storing a program

The first base station () includes a first call processing unit () and a communication path establishment unit (). The communication path establishment unit () performs processing for establishing a wireless link with the second base station (). The first call processing unit () performs call processing for setting the wireless communication path to the second base station () via the communication path establishment unit (). The second base station () includes a second call processing unit () and a transfer unit (). The second call processing unit () performs call processing for setting the wireless communication path to the first base station (). When the transfer unit () receives a signal for the call processing from the first base station (), the transfer unit () transfers this signal to the second call processing unit ().

Wireless communication system, base station and wireless communication method

A radio communication system according to the present invention includes a radio base station device and a parameter determination device. The radio base station device includes: an antenna device which performs radio communication with a mobile station device; a positional information acquisition unit which acquires positional information representing a position of the antenna device; and a control unit which notifies the parameter determination device of the positional information acquired by the positional information acquisition unit, and controls the antenna device according to a parameter transmitted from the parameter determination device. The parameter determination device includes: a storage unit which stores information of a periphery where the radio base station device is installed; and a parameter determination unit which determines a parameter of the radio base station device based on the periphery information and the positional information of the radio base station device, and transmits the determined parameter to the radio base station device.

Radio communication system, radio base station device, and device for determining parameters

A wireless base station apparatus according to the present invention has a plurality of wireless resources allocated in correspondence with communication processings on real-time data, non-real-time data and shared data, and a control section. The control section stores a table for recording states of use of the wireless resources, and upon receiving a signal for requesting setting some of the wireless resources for new real-time data, and if no released resource is found by referring to the table, allocates part of wireless resources for communication processing on the shared data to wireless resources for communication processing on the new real-time data, and upon receiving a signal for requesting setting some of the wireless resources for new shared data, and if no released resource is found by referring to the table, allocates part of wireless resources for communication processing on the non-real-time data to wireless resources for communication processing on the new shared data.

Wireless base station apparatus capable of effectively using wireless resources according to sorts of data

A control method for a mobile communication system. The method includes receiving data destined for a mobile terminal from a host apparatus; storing the data in a buffer; keeping the stored data destined for the mobile terminal available even when the mobile terminal changes a cell association; retrieving the data from the buffer; and transmitting the data to the mobile terminal via wireless signals.

Mobile communication system, radio base station apparatus, mobile terminal, and control method therefor

The present invention provides a mobile communication system that can efficiently control the conflicting abilities of making the high quality communication and keeping the number of accommodating the mobile terminals. A radio quality measuring part of a mobile terminal requests a radio base station to increase or decrease the transmitting power to attain a needed receiving quality. A radio quality control part controls the receiving quality so that the bearer quality may attain the required quality on the basis of the bearer quality measured by a bearer quality control part. The radio base station always monitors the quality for a radio section. When this radio quality exceeds a threshold specified by a radio base station controller, the radio base station reports to the radio base station controller the worsening or improvement of the radio quality via a radio base station protocol terminator with a radio quality report.

Mobile communication system, radio base station controller and transmitting and receiving power control method therefor

A network access control is performed by using a status management table having a maximum permissible number of entries, which is determined depending on a time-out period predetermined by user terminals and a hardware-setting time required for setting communication resource. When receiving an access start request received from a user terminal, it is determined whether the hardware setting corresponding to the access start request is estimated to be completed within the time-out period. If it is estimated to be completed, the received access start request is registered into the status management table to issue a hardware setting command. If it is estimated not to be completed, an access rejection message is sent back to the user terminal.

Network access control technique in a CDMA system

A system for monitoring a CDMA-type mobile terminal device, includes (a) a CDMA base station system, (b) a CDMA core network connected to the CDMA base station system through wires, (c) a server which monitors the CDMA base station system connected to the CDMA core network through wires, (d) a monitoring device connected to the server through wires, the monitoring device monitoring and controlling the CDMA base station system through both the server and the CDMA core network, and (e) a CDMA-type mobile terminal device connected to the CDMA base station system through radio signals.

System for monitoring CDMA-type mobile terminal and method of doing the same

A baseband signal processor is used in a base station of a CDMA communication system. The baseband signal processor comprised a plurality of processing panels which abstract specific data sequences from an input signal to produce abstracted data sequences. A RAKE section is connected to the processing panels which synthesize the abstracted data sequences to produce the synthesized data sequence. A controller is related to the processing panels and connected to the RAKE section to select at least one of the processing panels in response to a first transmission rate. Selected processing panels selected by the controller abstract the first derivative data sequences from the input signal as the specific data sequences and to produce first abstracted data sequences as the abstracted data sequences. The RAKE section synthesizes the first abstracted data sequences under the control of the controller.

Baseband signal processor capable of dealing with multirate and multiuser communication with a small structure

A PDC communication controlling apparatus includes an audio processing section for converting a digital audio signal which has been encoded at a transmission rate of a personal digital cellular (PDC) into a digital audio signal at a transmission rate of a digital exchange network, a small radio base station controlling section accommodating a plurality of small radio base stations which are connected to PDC portable terminal units through radio circuits and which have different radio cover areas, the small radio base station controlling section managing the radio cover areas of the PDC portable terminal units, controlling calls, and controlling and managing the radio circuits, a network-side adaptor used in non-audio communications with the PDC portable terminal units, a PDC/network interface section connected to a private branch exchange through a plurality of communication paths, a time division switch for connecting the PDC/network interface, the audio processing section, the radio base station controlling section and the network-side adaptor and for switching the connection state thereof under the control of the small radio base station controlling section on time division basis.

PDC (personal digital cellular) communication controlling apparatus and system thereof

A voltage-controlled oscillator generates an oscillation signal having a frequency corresponding to a control signal. A phase comparator detects a phase difference between a reference signal and a frequency-divided signal derived from the oscillation signal and generates a phase difference signal. A control circuit, which comprises an A/D converter, a high-speed processor, and a D/A converter, generates a control voltage so as to reduce a time-dependent change in the phase difference signal to synchronize the oscillation signal with the reference signal. When the synchronization of the oscillation signal with the reference signal is completed, the control circuit secures a control voltage at the time time-dependent change in the phase difference signal becomes equal to or smaller than a phase difference stored in a flash ROM.

Automatic frequency control oscillation circuit

An error allowing pattern matching circuit comprises a data conversion circuit which converts receive data transmitted serially thereto from an input terminal into parallel data and outputs the parallel data, a ROM to which the parallel data from the data conversion circuit are inputted as an address signal and which outputs the numbers of error bits for four different particular patterns to be detected in response to the address signal, four setting circuits for setting the allowable numbers of error bits for the receive data, and four comparison circuits which individually compare the four sets of error bit numbers outputted from the ROM with the allowable numbers of error bits set by the four setting circuits, each generating the receive data when the error bit number becomes lower than the corresponding allowable number of error bits as a detection pulse.

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Tokyo, Japan

Kanada Nakayasu