Abstract: A base station performs communication with a terminal by using a cell defined as a combination of a frequency and an area reachable by a signal transmitted from the base station. The base station specifies, for each of cells, a first area in which disconnection of communication with a terminal occurs more frequently as compared to another area. The base station controls handover that changes a current cell of a first terminal to another cell, based on information on the specified first area and the current cell of the first terminal, and a position, moving speed, and moving direction of the first terminal.

Abstract: An apparatus collects, from mobile stations, first information indicating communication qualities of communications between the mobile stations and base stations, in association with position information indicating a position of each of the mobile stations, and determines, based on the first information for each of zones corresponding to the position information, whether a handover communication of a first mobile station to a first zone is unavailable. Upon determining that the handover communication of the first mobile station to the first zone is unavailable, the apparatus specifies the first zone as an unavailable area. When availability of the handover communication to a second zone, which is adjacent to the first zone of the unavailable area, is not defined yet and the second zone is adjacent to a plurality of the first zones determined as the unavailable area, the apparatus estimates the second zone as the unavailable area.

Abstract: A wireless base station device includes a broadcast signal transmission unit that transmits a broadcast signal to a cell; a measurement signal communication unit that transmits to a mobile terminal device existing in the cell a measurement instruction signal and receives a measurement report signal from the mobile terminal device; a failure detection processing unit that detects a failure of a first cell with respect to a transmission function from the wireless base station to the first cell according to whether a measurement report signal including a measurement report of a wireless quality for a second cell measured by a mobile terminal device existing in a coverage area of the first cell is received or not; and an alarm signal transmission unit that transmits an alarm signal to notify a failure monitoring device of an occurrence of the failure of the first cell.

Abstract: A wireless base station device includes a broadcast signal transmission unit that transmits a broadcast signal to a cell; a measurement signal communication unit that transmits to a mobile terminal device existing in the cell a measurement instruction signal and receives a measurement report signal from the mobile terminal device; a failure detection processing unit that detects a failure of a first cell with respect to a transmission function from the wireless base station to the first cell according to whether a measurement report signal including a measurement report of a wireless quality for a second cell measured by a mobile terminal device existing in a coverage area of the first cell is received or not; and an alarm signal transmission unit that transmits an alarm signal to notify a failure monitoring device of an occurrence of the failure of the first cell.

Abstract: A base station performs communication with a terminal by using a cell defined as a combination of a frequency and an area reachable by a signal transmitted from the base station. The base station specifies, for each of cells, a first area in which disconnection of communication with a terminal occurs more frequently as compared to another area. The base station controls handover that changes a current cell of a first terminal to another cell, based on information on the specified first area and the current cell of the first terminal, and a position, moving speed, and moving direction of the first terminal.

Abstract: A communication apparatus includes memory that stores registration information that indicates a registered mobile terminal registered in a base station; and a processor configured to perform connection processing of connecting a non-registered mobile terminal to the base station, based on a connection request signal from the non-registered mobile terminal not stored in the memory; measure utilization of the base station by the non-registered mobile terminal for which the connection processing has been performed; and transmit obtained measurement results to another communication apparatus via a communication interface.

Abstract: A communication apparatus includes memory that stores registration information that indicates a registered mobile terminal registered in a base station; and a processor configured to perform connection processing of connecting a non-registered mobile terminal to the base station, based on a connection request signal from the non-registered mobile terminal not stored in the memory; measure utilization of the base station by the non-registered mobile terminal for which the connection processing has been performed; and transmit obtained measurement results to another communication apparatus via a communication interface.

Abstract: A wireless base station includes: a detector for detecting radio interference between the wireless base station and another wireless base station; and a transiting controller for transiting a state of the wireless terminal, the wireless terminal performing a wireless communication with the wireless base station at the state, to a change state in which a frequency used between the wireless base station and the wireless terminal is changed while a communication connection between the wireless base station and the wireless terminal is kept to be established, upon detecting the radio interference.