Abstract: A mobile communication system includes a control device and a base station device. Data communication between the control device and the base station device is conducted using a fixed-length data size and a variable-length data size. The control device transmits information indicating whether a data size of the data communication has a fixed length or a variable length. The base station device receives the information from the control device.

Abstract: A mobile communication system includes a mobile station, a base station that communicates wirelessly with the mobile station, a gateway apparatus that connects the base station to a core network, and a core network apparatus that is arranged in the core network. The base station includes a control unit that includes, in a message, information indicating that the mobile station has originated a call as an emergency call, and a transmission unit that transmits the message to the core network apparatus. In addition, the core network apparatus includes a reception unit that receives the message that was transmitted from the base station.

Abstract: In order to change control over a user equipment within a femtocell in accordance with a change in camping of the user equipment, a communication system includes a femto base station (10) that provides a femtocell includes notification destination setting means (20) for setting, in the femto base station (10), a notification destination to be notified of a change in camping of a user equipment (30) on the femtocell. The femto base station (10) notifies the set notification destination of the change in camping of the user equipment (30), upon detection of the change in camping.

Abstract: A mobile communication system according to the present invention that can provide a mobile communication system capable of reducing power consumption by a radio base station apparatus includes a radio base station apparatus (1) that communicates with a mobile terminal (4), a location information management apparatus (3) that acquires location information of the mobile terminal (4), and a processing apparatus (2) that changes an operation state so that the radio base station apparatus (1) does not emit radio waves based on changes in the location information of the mobile terminal (4) acquired by the location information management apparatus (3). When the mobile terminal (4) moves from a position within a service area of the radio base station apparatus (1) to a position outside the service area, for example, the processing apparatus (2) changes the operation state so that the radio base station apparatus (1) does not emit radio waves.

Abstract: An increase in communication load in a network due to increasing messages for requesting information is suppressed. When a message for requesting information and a response message thereto are sent and received between a communication device (N1-Nn) that is an information requester and an information provider (Nx) on a network (NW) via a communication device (1), the communication device (1) stores the information acquired from the response message in a response information storage section (4), and when any communication device requests at least part of the same information, a control section (5) creates a response message including the requested information and responds.

Abstract: A pneumatic radial tire includes: a pair of bead portions; a pair of side wall portions; and a tread portion in which a carcass layer is mounted between the pair of bead portions, and a belt layer that includes a plurality of monofilament steel wires laid in parallel and embedded in rubber is disposed between the pair of side wall portions on an outer circumferential side in the tread portion. The wire strand diameter of the monofilament steel wires is from 0.30 mm to 0.40 mm, each of the monofilament steel wires is twisted around their axial direction with a wire surface twisting angle of 1° to 15° with respect to the axial direction of the monofilament steel wires, and the surface residual stress of the monofilament steel wires is 0 MPa or less.

Abstract: In order to avoid deterioration in sound quality caused by band shortage between an HNB-GW and an HNB, in a femto system 100, an HNB-GW 140 is connected to an HNB 120 via a network 130, and relays at least one of transmission and reception of voice data between an MGW 170 and the HNB 120. A narrow band determination unit 150 in the HNB-GW 140 determines whether the band of the network 130 is a narrow band which is equal to or lower than a predetermined threshold. When it is determined that the band is a narrow band by the narrow band determination unit 150, a conversion unit 160 converts the voice data to decrease a bit rate of the voice data transferred to the HNB 120 from the MGW 170.

Abstract: A communication system is described in which mobile telephones that are members of closed subscriber groups associated with home base stations are able to roam between neighbouring home node base stations in a manner that reduces load on the core network.

Abstract: An ultrasonic flaw detecting apparatus including: a transducer including a piezoelectric element array for transmitting ultrasonic waves to and receiving echo signals from a test object; an element driving unit for scanning the piezoelectric element array at a predetermined cycle and generating the ultrasonic waves; a synthesizing unit for synthesizing an internal image of the test object based on the echo signals received by the piezoelectric element array; and a signal replacing unit for replacing the received echo signal with an echo signal in which a bottom echo of the test object is removed.

Abstract: A mobility control method and device that can suppress an increase of location registration signaling are provided. In a mobile communication network including cells (21a, 21b) of multiple types differing in cell size, mobility determination times (T_reselection) are determined for individual neighbor cells (22a-29d) or individual neighbor cell types (Operation 303), and mobility control is performed by determining whether or not a predetermined mobility criterion remains satisfied during the mobility determination time set for a neighbor cell (Operations 304-306).

Abstract: A gateway device (10) according to the present invention includes a memory (11) that stores information regarding an environment around a radio base station; a controller (12) that generates a message for paging a mobile station which camps on the radio base station to execute processing for determining information of a radio base station to which the message is transmitted based on the stored information; and a transmission unit (13) that transmits the message. Paging optimization is thus achieved by reducing the number of paging messages.

Abstract: A mobile communication system includes a control device and a base station device. Data communication between the control device and the base station device is conducted using a fixed-length data size and a variable-length data size. The control device transmits information indicating whether a data size of the data communication has a fixed length or a variable length. The base station device receives the information from the control device.

Abstract: A mobile communication system includes a first Home Node B (HNB); a second HNB; and a HNB gateway (HNB-GW) that is connected to a core network, wherein the first HNB is configured to communicate with a user equipment (UE) before a relocation of intra HNB-GW in which the UE is relocated from the first HNB to the second HNB, wherein the second HNB is configured to communicate with a user equipment (UE) after the relocation and send Iu-UP Initialization comprising an RFCI information to the HNB-GW during the relocation, and wherein the HNB-GW is configured to receive the Iu-UP Initialization.

Abstract: A mobile communication system (100) includes: several radio base stations (111-11n) each transmitting a setting request including ID of the radio base station itself and group ID identifying a group to which the radio base station belongs; a gateway (120), the gateway (120) associating the ID and the group ID included in the setting request with each other upon receipt of the setting request and storing as distribution destination information; and a switching center (130) transmitting, to the gateway (120), a distribution request including the group ID of a group being a target to distribute an emergency early warning. The gateway (120) specifies at least one radio base station associated with the group ID included in the distribution request out of the distribution destination information, and transfers the distribution request to the specified radio base station. The radio base station distributes the emergency early warning to a subordinate cell.

Abstract: A mobility control method and device that can suppress an increase of location registration signaling are provided. In a mobile communication network including cells (21a, 21b) of multiple types differing in cell size, priorities for mobility control are set on individual neighbor cells (22a-29d) or individual neighbor cell types, and mobility control is performed such as to select a neighbor cell with a priority lower than that of a currently staying cell when a mobile terminal is moving faster than a predetermined speed (Operations 303-306).

Abstract: A mobile communication system includes a control device and a base station device. Data communication between the control device and the base station device is conducted using a fixed-length data size and a variable-length data size. The control device transmits information indicating whether a data size of the data communication has a fixed length or a variable length. The base station device receives the information from the control device.

Abstract: A gateway device connects a base station to a core network. The gateway device has a communication unit that receives, from a mobile management server in the core network, a key that cancels ciphering that was set in an NAS message that was received from a terminal that is subordinate to the base station.

Abstract: A mobile communication system including: a terminal, a movement-origin base station to which the terminal connects before movement of the terminal; a movement-destination base station to which the terminal connects after movement of the terminal; and a higher-order apparatus that has the movement-origin base station and the movement-destination base station under its control. Control information for voice encoding is set in advance in the movement-origin base station and the movement-destination base station, the movement-origin base station includes the control information of its own station in a first message and transmits the first message to the higher-order apparatus, and the higher-order apparatus includes the control information of the movement-origin base station in a second message and transmits the second message to the movement-destination base station.

Abstract: A mobile communication system includes a mobile station, a base station that communicates wirelessly with the mobile station, a gateway apparatus that connects the base station to a core network, and a core network apparatus that is arranged in the core network. The base station includes a control unit that includes, in a message, information indicating that the mobile station has originated a call as an emergency call, and a transmission unit that transmits the message to the core network apparatus. In addition, the core network apparatus includes a reception unit that receives the message that was transmitted from the base station.

Abstract: A radio communication system, a radio station, a network operation management apparatus, and a network optimization method are provided that can optimize a performance of the entire system even when network optimization is performed individually. In the radio communication system including multiple radio stations (10, 20, 30) and network operation management apparatuses managing the radio stations, network optimization is autonomously performed. A first radio station (10) notifies first optimization information regarding network optimization in a cell (10a) of the first radio station to at least one of another second radio station (20/30) that is different from the first radio station and a network apparatus that manages the second radio station (101).