Fujitsu Corporation

Michiko Anbe

Dai Kimura

Nobukazu Fudaba

Junji Otonari

Kazuhiko Yamaguchi

Fumiyasu Kurokochi

A base station serving terminals, the base station including: a memory, and a processor coupled to the memory and configured to: select a terminal among the served terminals based on reception powers or reception qualities at the served terminals, when a number of the served terminals exceeds a threshold, determine an amount of change in transmission parameter so that a reception quality at the selected terminal from another base station satisfies a certain condition in case where a handover of the selected terminal to the other base station is performed, the other base station being selected based on the reception powers or the reception qualities, perform the handover of the selected terminal to the other base station, and change the transmission parameter by the determined amount of change.

Base station and handover control method

A radio base station apparatus for performing radio communication with a terminal apparatus by using a first and second radio frequency bands, the radio base station apparatus including a change unit which changes a radio frequency band for transmitting a control signal from the first radio frequency band to the second radio frequency band, when the change unit detects interference with respect to the control signal transmitted to the terminal apparatus; and a transmission unit which transmits the control signal by using the second radio frequency band.

Radio base station apparatus, radio communication method in radio base station apparatus, and radio communication system

A wireless base station apparatus to establish a wireless connection with a terminal equipment detects an intensity of a signal transmitted from another terminal equipment; calculates, as transmission power for the terminal equipment, a sum of a first parameter adjusted at an interval of predetermined time and a second parameter taking a value between a predetermined first minimum value and a predetermined first maximum value; sets, as the second parameter, the larger value of a difference between first target power and the first parameter and the first minimum value when detecting that reception power of the signal transmitted from another terminal equipment is equal to or larger than a predetermined value, and further sets a difference between the first target power and the first minimum value as the first parameter and the first minimum value as the second parameter when the first parameter is adjusted.

Wireless base station apparatus and communication method

A wireless base station includes a storage unit and a processor. The processor transmits to a first wireless terminal a first request for transmitting a first response including first identifiers used to identify a first base stations. The first wireless terminal is capable of receiving a signal from each of the first base stations. The processor receives the first response from the first wireless terminal. The processor stores the first response in the storage unit. The processor transmits to a second wireless terminal a second request for transmitting a second response including second identifiers used to identify second base stations. The second wireless terminal is capable of receiving a signal from each of the second base stations. The processor receives the second response from the second wireless terminal. The processor determines whether the wireless base station has been displaced based on the first identifiers and the second identifiers.

Base station and method for detecting displacement of base station

An apparatus for allocating one or more connection identifiers in a base station of a wireless communication system is used in a base station. The base station has a function of allocating one or more connection identifiers used for specific call communication between the base station and a mobile station. The apparatus includes a unit for defining one or more connection identifiers used for the specific call communication and one or more burst profiles that are attributes related to wireless communication using the one or more connection identifiers. Also included is a unit for broadcasting the one or more connection identifiers used for the specific call communication and the one or more burst profiles to the mobile station.

Method and apparatus for allocating connection identifier in wireless communication system

A radio device in a first base transceiver station for communicating with a mobile station located in a radio propagation area of the first base transceiver station, the radio device includes a test target selection processing unit for identifying a mobile station located in an area covered with both the radio propagation area of the first base transceiver station and a radio propagation area of a second base transceiver station established adjacent to the first base transceiver station, and a test request processing unit for transmitting a test request signal having information concerned with the second base transceiver station to the mobile station identified by the test target selection processing unit so that the mobile station executes a connection test on the second base transceiver station, and for processing a test result signal responded by the mobile station.

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Kawasaki, Japan

Michiko Anbe