Abstract: A wireless communication system allows a handover operation to a base station communicating through a plurality of frequency bands. The mobile terminal includes a communication unit adapted to perform communication with any of the base stations through a plurality of frequency bands. The communication unit of the base station notifies, when communication through a plurality of frequency bands is possible, a mobile terminal about information directed to identifying a main frequency band from relevant frequency bands in a manner allowing discrimination from one or more frequency bands other than the main frequency band. The communication unit of the mobile terminal determines that, upon receiving information directed to identifying a main frequency band from the second base station during having communication connection with the first base station, that the frequency band identified by the relevant information is a subject of handover towards the second base station.

Abstract: A mobile communication system includes: a plurality of mobile communication terminals; and a first base station device configured to wirelessly communicate with the plurality of mobile communication terminals. The first base station device is configured to report to the plurality of mobile communication terminals that a second base station device allowing only a particular mobile communication terminal access is set to allow all the plurality of mobile communication terminals access, by transmitting using cell broadcast service, identification information of the second station device.

Abstract: A wireless communication system, a communication method, a base station, and a communication terminal are provided. The wireless communication system includes a base station, and a communication terminal that can communicate with the base station through a plurality of frequency bands. The wireless communication system includes a first notification module provided at one of the base station and communication terminal for notifying the other of the base station and communication terminal of a switching preparation request when a state is detected in which the frequency band used as the main frequency band among the plurality of frequency bands is to be switched, and a second notification module that notifies one of the base station and communication terminal of frequency band switching preparation completion in response to a determination of being in a state in which the frequency band used as the main frequency band is to be switched.

Abstract: A wireless communication system allows a handover operation to a base station communicating through a plurality of frequency bands. The mobile terminal includes a communication unit adapted to perform communication with any of the base stations through a plurality of frequency bands. The communication unit of the base station notifies, when communication through a plurality of frequency bands is possible, a mobile terminal about information directed to identifying a main frequency band from relevant frequency bands in a manner allowing discrimination from one or more frequency bands other than the main frequency band. The communication unit of the mobile terminal determines that, upon receiving information directed to identifying a main frequency band from the second base station during having communication connection with the first base station, that the frequency band identified by the relevant information is a subject of handover towards the second base station.

Abstract: Provided is an HeNB which can cause a mobile station within a coverage of the HeNB to be handed over to another communicable base station. An HeNB communicates with an MME through a relay process by a gateway. The HeNB detects a state of the gateway. The HeNB stops communication with a mobile phone in accordance with the state of the gateway.

Abstract: The mobile station device has: a first step of selecting a plurality of base station devices meeting a predetermined handover condition, based on reception levels of a plurality of signals transmitted from the plurality of base station devices; and a second step of reselecting, if the plurality of base station devices selected in the first step include a plurality of base station devices for specific subscribers, a base station device to be accessed from among the plurality of base station devices for specific subscribers, by using a predetermined correlation between frequencies and priorities. Accordingly, the number of frequencies can be reduced, and the ping-pong phenomenon can be suppressed.

Abstract: A priority storing unit (b117) stores, for each of frequency bands predetermined, a priority for accessing a base station device using associated one of the frequency bands. A service type determining unit (b114) chooses, based on identification information received from the at least one first base station device, which of the first and second services to receive from each of the at least one first base station device. A priority determining unit (b116) determines, based on a type of a connection service chosen by the service type determining unit (b114), a priority for each of the frequency bands which is used by the at least one first base station device, and to update the priority stored by the priority storing unit (b117) based on the priority determined.

Abstract: A communication system includes a mobile terminal; a management device that manage a position of the mobile terminal; a first base station that creates a first cell area and retains management information for managing a mobile terminal in the first cell area; a gateway, arranged between the first base station and the management device, that retains management information for managing a mobile terminal in the first cell area; and a second base station that creates a second cell area. In a case where the management entity of the mobile terminal is changed from the first base station to the second base station, the first base station updates management information, included in its retaining management information, associated with the relevant mobile terminal, and transmits to the gateway a command to update management information associated with the relevant mobile terminal.

Abstract: A mobile communication system includes: a mobile station device; a first base station device to which an accessible time is set; and a second base station device. If the mobile communication system detects that a time according to the accessible time elapses and if the mobile station device is in communication with the first base station device, the mobile communication system performs a handover to switch a communication connection between the mobile station device and the first base station device to a communication connection between the mobile station device and the second communication device. Accordingly, disconnection of a call is prevented from occurring if the communication device is in communication with the first base station device when the accessible time expires.

Abstract: In a handover control method of a mobile station device, it is determined that whether or not the mobile station device is within the CSG cell. In addition, it is determined that whether or not the CSG cell is an HPLMN, in case that it is determined that the mobile station device is within the CSG cell. In addition, a neighboring cell measurement is executed and handover is performed, in case that it is determined that the CSG cell is the HPLMN, and in case that the mobile station device is set to measure the neighboring cell. In addition, the neighboring cell is not measured, in case that it is determined that the CSG cell is not the HPLMN, and even in case that the mobile station device is set to measure the neighboring cell.

Abstract: A wireless communication system including a mobile terminal and a plurality of base stations is provided. Each of base stations includes communication unit selectively uses at least one of a plurality of frequency bands to communicate with the mobile terminal, and a handover unit performs handover with at least one another base station. The mobile terminal includes a storage unit stores, by each base station basis, information of a frequency band used for communication from the plurality of frequency bands, and a notification unit notifies, when handover from a first base station currently connected in communication to a second base station is required, the first base station about a proximity indication associated with some of the plurality of frequency bands based on the stored information of the frequency band used for communication.

Abstract: A wireless communication system includes: a macrocell base station device; a micro base station device serving a cell having a region including at least a part of a region of a cell served by the macrocell base station device; and a mobile station device. One of the macrocell base station device and the micro base station device includes a reporter configured to report, to the mobile station device, micro base station information indicating the micro base station device to which the mobile station device can perform a handover. The mobile station device includes a handover destination selector configured to select a handover destination based on the micro base station information reported. Thereby, a handover is prevented while preventing the processing load on the mobile station device.

Abstract: A mobile station connected to a wireless communication network includes a surrounding environment recording unit configured to record a surrounding environment of the mobile station; a proximity determination unit; and a proximity indication generation unit configured to generate a proximity indication. The proximity determination unit compares a past surrounding environment record that has been recorded by the surrounding environment recording unit with the current surrounding environment record.

Abstract: A mobile communication system includes: a plurality of mobile communication terminals; and a first base station device configured to wirelessly communicate with the plurality of mobile communication terminals. The first base station device is configured to report to the plurality of mobile communication terminals that a second base station device allowing only a particular mobile communication terminal access is set to allow all the plurality of mobile communication terminals access, by transmitting using cell broadcast service, identification information of the second station device.

Abstract: A mobile station device is configured to wirelessly communicate with a plurality of base station devices. In case that a base station device selected as a base station device to be reselected is a base station device on which the mobile station device is prohibited to camp, and has reported an indication of prohibition to reselect a base station device using the same frequency, the mobile station device is configured to delay application of the indication of prohibition, and to apply the indication of prohibition when the mobile station device performs transmission.

Abstract: A wireless communication system includes: a macrocell base station device; a micro base station device serving a cell having a region including at least a part of a region of a cell served by the macrocell base station device; and a mobile station device. One of the macrocell base station device and the micro base station device includes a reporter configured to report, to the mobile station device, micro base station information indicating the micro base station device to which the mobile station device can perform a handover. The mobile station device includes a handover destination selector configured to select a handover destination based on the micro base station information reported. Thereby, a handover is prevented while preventing the processing load on the mobile station device.

Abstract: A priority storing unit (b117) stores, for each of frequency bands predetermined, a priority for accessing a base station device using associated one of the frequency bands. A service type determining unit (b114) chooses, based on identification information received from the at least one first base station device, which of the first and second services to receive from each of the at least one first base station device. A priority determining unit (b116) determines, based on a type of a connection service chosen by the service type determining unit (b114), a priority for each of the frequency bands which is used by the at least one first base station device, and to update the priority stored by the priority storing unit (b117) based on the priority determined.

Abstract: The mobile station device has: a first step of selecting a plurality of base station devices meeting a predetermined handover condition, based on reception levels of a plurality of signals transmitted from the plurality of base station devices; and a second step of reselecting, if the plurality of base station devices selected in the first step include a plurality of base station devices for specific subscribers, a base station device to be accessed from among the plurality of base station devices for specific subscribers, by using a predetermined correlation between frequencies and priorities. Accordingly, the number of frequencies can be reduced, and the ping-pong phenomenon can be suppressed.

Abstract: A mobile communication system includes: a mobile station device; a first base station device to which an accessible time is set; and a second base station device. If the mobile communication system detects that a time according to the accessible time elapses and if the mobile station device is in communication with the first base station device, the mobile communication system performs a handover to switch a communication connection between the mobile station device and the first base station device to a communication connection between the mobile station device and the second communication device. Accordingly, disconnection of a call is prevented from occurring if the communication device is in communication with the first base station device when the accessible time expires.

Abstract: In a reception apparatus that receives random access signals transmitted from a transmission apparatus by being allocated to preset resources, the reception apparatus includes a resource allocation configuration candidate storage section that stores in advance a plurality of different resource allocation configurations which are obtained by combining the resources and have different sizes of the combined resources, a resource allocation configuration decision section that decides a resource allocation configuration from resource allocation configurations stored in the resource allocation configuration candidate storage section based on a value indicating a receiving frequency of the random access signal, and a resource allocation configuration report section that reports information of the resource allocation configuration decided by the resource allocation configuration decision section.