摘要:
A terminal apparatus (1) which is a radio transmitting/receiving apparatus receives, from a femto cell base station (home eNB), a pilot channel signal for reception quality measurement and a synchronization channel signal for synchronization. The terminal apparatus (1) has a whitelist stored therein indicative of an accessible femto cell, and determines whether or not a CSG cell of handover destination is accessible based on a PCI of the CSG cell acquired from the synchronization channel and the whitelist. The terminal apparatus (1) then adds the PCI and a CGI to a measurement report for reception quality, and transmits the measurement report to a macro eNB (base station apparatus (2)). In this way, it is possible to suppress wasteful signaling and prevent unnecessary resources from being reserved even when two or more CSG cells that use the same PCI are present in the macro cell.
摘要:
In a mobile communication system, a handover of a terminal device (MT) from a macrocell base station (eNB) to a small cell base station (HeNB) is controlled via a host device (MME or HeNB-GW). Physical cell ID deployment map information (PCI deployment map information), which includes at least information (PCI/CGI map information) indicating the correspondences between physical cell IDs and unique cell IDs of CSG cells for which access is granted, is generated in the host device (MME or HeNB-GW). When the terminal device measures the reception quality for surrounding CSG cells for handover control to any of the CSG cells, the terminal device uses the PCI deployment map information to generate a measurement result report. Thus, a service interruption caused by handover control to an inaccessible small cell can be avoided, and the wait time for handover control can be reduced.
摘要:
It is possible to provide a radio transmission device, a radio reception device, and a radio communication system which can effectively use a resource of a unicast/MBMS cell and prevent increase of a signaling amount accompanying a cell switching. A UE measures a reception level of an MEMS-dedicated cell. When the measured reception level is below a first threshold value, the UE switches the serving MBMS cell from the MBMS-dedicated cell to the unicast/MBMS cell. Moreover, when the reception level of the MBMS-dedicated cell exceeds a second threshold value obtained by adding an offset value to the first threshold value, the serving MBMS cell is switched from the unicast/MBMS cell to the MBMS-dedicated cell.
摘要:
To make it possible for a legacy user equipment to correctly generate and use a common key between a user equipment and a base station and between the user equipment and a relay node when the relay nodes are being introduced. An HO request processing unit (202) extracts user equipment information from an HO request input from a receiver (201). A user equipment information determination section (204) determines a mode of handover from the user equipment information, and outputs a determination result to a key generator (205), a key information update request preparation section (206), and an HO command generator (207). In a case of handover from one base station to a relay node of another base station or to the other base station, the user equipment information determination section (204) commands the key information update request preparation section (206) to prepare a key information update request to a high-level management node so as to update the key information.
摘要:
A wireless transmitting device (10) comprises an MBMS data transmitting unit (14) transmitting MBMS data, an MBMS control information generating unit (13) generating MBMS control information comprising access barring information, and a transmitting unit (19). A wireless receiving device comprises a data receiving unit receiving MBMS data, a control information receiving unit receiving MBMS control information comprising access barring information, an access class control unit performing access class control on the basis of the MBMS control information, and an RACH preamble transmitting unit transmitting an RACH preamble on the basis of the result of the access class control. Thus the wireless transmitting device and the wireless receiving device can maintain an acceptable chance of successful connection establishment by wireless communication devices that do not receive MBMS, without reducing customer satisfaction in a cell that provides MBMS.
摘要:
A radio communication base station apparatus, a radio communication terminal, and radio transmission and reception methods for a terminal to efficiently acquire the service status of the neighbor-cell before the terminal makes a cell change are provided. A subarea ID storage section 107 stores a subarea identifier. An MIB generator 102 generates a master information block including scheduling information of a scheduling block and the subarea identifier of the subarea to which the own cell belongs, and transmits the master information block from an MIB transmitter 108. An MBMS SB generator 104 generates the scheduling block including the identifier of the subarea where the broadcast or multicast service is provided, and transmits the scheduling block from an MBMS SB transmitter 109.
摘要:
A mobile terminal which can be connected to a plurality of base stations with different mobile communication systems, includes a handover determination section that determines a handover execution between cells provided by the plurality of base stations, a transmission rate control section that changes a transmission rate before a handover when the handover execution is determined, and a report creation section that creates a measurement report including information regarding the handover after the transmission rate is changed, and transmits the measurement report to a base station of a cell to which the mobile terminal is currently connected.
摘要:
Influence on a key used between a user equipment and a base station, which will be imposed by unsecured updating of a key between the base station and a relay node when a relay node is being introduced is diminished. An HO request processing unit (202) extracts user equipment information from an HO request input from a receiver (201). A user equipment information determination section (204) determines a mode of handover from the user equipment information, and outputs a determination result to a key generator (205) and an HO command generator (207). In relation to a determination about a mode of handover on the basis of user equipment information, it is determined whether the handover is handover from a relay node to a base station, handover from a base station to a relay node, handover relating to relay nodes subordinate to the same base station, and the like. Then, preparation of handover command, updating of a key, and the like are performed in conformance with the mode of handover
摘要:
A wireless communication base station (10) comprises a system information generating unit (20) that generates system information including a several system information messages, a paging message generating unit (22) that generates a paging message including a modification flag that indicates whether or not the system information has been modified; and a transmitter (18) that transmits the system information and the paging message. The system information generating unit (20) generates system information including a system information message in which an emergency message is described, and the paging message generating unit (22) generates a paging message that further includes information indicating that the emergency message is present in the system information and an identifier that identifies a system information message in which the emergency message is described. Consequently, a wireless communication base station can be provided which is capable of urgently notifying system information to be broadcast at a schedule according to the urgency of the system information while suppressing modifications to the system information as much as possible.
摘要:
A semiconductor polishing compound comprising cerium oxide abrasive grains, water and an additive, wherein the additive is a water-soluble organic polymer such as ammonium polyacrylate or an anionic surfactant, the pH at 25° C. is from 3.5 to 6, and the concentration of the additive is from 0.01 to 0.5% based on the total mass of the polishing compound. This polishing compound simultaneously has dispersion stability, excellent scratch characteristics and excellent polishing planarization characteristics. In particular, this polishing compound provides excellent planarization characteristics having dishing fluctuation reduced, when used for polishing a semiconductor substrate having a silicon nitride film 3 and a silicon oxide film 2 formed on a silicon substrate 1. Further, the time for polishing a pattern wafer can be shortened by using this polishing compound.