Abstract: In a state where a mobile station UE is communicating with a radio base station S-eNB supporting “extended PDCP-SN,” the mobile terminal continues communications even if it performs a reconnection procedure with a radio base station T-eNB not supporting “extended PDCP-SN.” A mobile communication method according to the invention includes the steps of, when detecting RLF in the bearer in the above-described state, the mobile station UE resetting setting of “extended PDCP-SN” and establishing a bearer using “conventional PDCP-SN” by performing a reconnection procedure with a radio base station T-eNB not supporting “extended PDCP-SN.

Abstract: A radio base station apparatus including a function for determining a transmission power, including: a neighbor cell detection unit configured to detect a neighbor cell that interferes with a target cell that the radio base station apparatus can form; a received power measurement unit configured to measure, for each neighbor cell detected by the neighbor cell detection unit, a received power from the neighbor cell; and a transmission power determination unit configured to calculate, for each band part that overlaps with a transmission band of the radio base station apparatus in transmission bands of each neighbor cell, a sum of received powers for neighbor cells having transmission bands each including the band part, and to determine an interference amount in the target cell based on the sum of received powers so as to determine the transmission power by using the interference amount.

Abstract: Even when handover processing to a radio base station T-eNB not supporting “extended PDCP-SN” is performed on a mobile station UE communicating with a radio base station S-eNB supporting “extended PDCP-SN,” the communications are continued. A mobile communication method according to the invention includes the steps of: causing a radio base station S-eNB to determine to perform handover processing of a mobile station UE to a radio base station T-eNB not supporting “extended PDCP-SN” in a state where a first bearer using “extended PDCP-SN” is established with the mobile station UE, and causing the radio base station S-eNB to create “RRC connection reconfiguration” which instructs deletion of the first bearer and addition of a second bearer using “conventional PDCP-SN” and to transmit “RRC connection reconfiguration” to the mobile station UE.

Abstract: A radio base station apparatus including a function for determining a transmission power, including: a neighbor cell detection unit configured to detect a neighbor cell that interferes with a target cell that the radio base station apparatus can form; a received power measurement unit configured to measure, for each neighbor cell detected by the neighbor cell detection unit, a received power from the neighbor cell; and a transmission power determination unit configured to calculate, for each band part that overlaps with a transmission band of the radio base station apparatus in transmission bands of each neighbor cell, a sum of received powers for neighbor cells having transmission bands each including the band part, and to determine an interference amount in the target cell based on the sum of received powers so as to determine the transmission power by using the interference amount.

Abstract: A radio control base station connected to a plurality of switching centers includes a capacity information receiving unit configured to receive capacity information from at least one of the plurality of switching centers, a load information receiving unit configured to receive load information from at least one of the plurality of switching centers, a selection ratio calculating unit configured to calculate a selection ratio for selecting a connection-target switching center to which a call from a mobile station is to be connected based on the received capacity information and the received load information, and a connection-target switching center determining unit configured to determine the connection-target switching center based on the calculated selection ratio.

Abstract: A radio communication system includes at least one user equipment, base stations, and a control station. After expiration of the timer started after establishment of the data bearer, the base station selects the access point base station for the user equipment on the basis of the voice congestion levels and indicates the access point base station to the user equipment if the voice bearer has been established, and selects the access point base station for the user equipment on the basis of the data congestion levels and indicates the access point base station to the user equipment if the voice bearer has not been established.

Abstract: A radio base station determines at least any one type of subframe constituted of multiple system information subframes for sending system information to a mobile station, paging subframes for sending paging messages for the mobile station in idle mode, or on-duration subframes corresponding to on-durations at which the mobile station receives downlink control channel signals in discontinuous reception mode for the downlink control channel signals. The radio base station allocates, to the mobile station, inter-frequency measurement periods for inter-frequency measurement at the mobile station, while avoiding simultaneous occurrence of inter-frequency measurement periods and the subframes determined by the subframe determiner.

Abstract: A base station is disclosed.

Abstract: Even when handover processing to a radio base station T-eNB not supporting “extended PDCP-SN” is performed on a mobile station UE communicating with a radio base station S-eNB supporting “extended PDCP-SN,” the communications are continued. A mobile communication method according to the invention includes the steps of: causing a radio base station S-eNB to determine to perform handover processing of a mobile station UE to a radio base station T-eNB not supporting “extended PDCP-SN” in a state where a first bearer using “extended PDCP-SN” is established with the mobile station UE, and causing the radio base station S-eNB to create “RRC connection reconfiguration” which instructs deletion of the first bearer and addition of a second bearer using “conventional PDCP-SN” and to transmit “RRC connection reconfiguration” to the mobile station UE.

Abstract: In a state where a mobile station UE is communicating with a radio base station S-eNB supporting “extended PDCP-SN,” the mobile terminal continues communications even if it performs a reconnection procedure with a radio base station T-eNB not supporting “extended PDCP-SN.” A mobile communication method according to the invention includes the steps of, when detecting RLF in the bearer in the above-described state, the mobile station UE resetting setting of “extended PDCP-SN” and establishing a bearer using “conventional PDCP-SN” by performing a reconnection procedure with a radio base station T-eNB not supporting “extended PDCP-SN.

Abstract: A base station includes a radio communication unit (82, 85) configured to wirelessly communicate with a mobile apparatus capable of communicating in both a first mobile communication system and a second mobile communication system and a network communication unit (83, 84) configured to communicate with a switching station in the first mobile communication system, and if a line setup instruction signal (Initial Context Setup Request) received at the network communication unit from the switching station is not due to initial access to the switching station by the mobile apparatus, the radio communication unit receives mobile apparatus capability information in the second mobile communication system (UE-UTRA-Capability) from the mobile apparatus after transmitting a line setup response signal (Initial Context Setup Response) to the switching station.

Abstract: Upon detecting an opportunity to release E-RABs related to mobile stations, a mobility management entity transmits a single E-RAB release information message that collectively specifies E-RABs to be released to a base station communicating with the mobile stations. Subsequently, upon receiving the E-RAB release information message, the base station transmits a single E-RAB release information acknowledge message to the mobility management entity. Upon receiving the E-RAB release information acknowledge message, the mobility management entity updates information related to the E-RABs so that the information indicates release of the E-RABs.

Abstract: A radio communication system includes at least one user equipment, base stations, and a control station. After expiration of the timer started after establishment of the data bearer, the base station selects the access point base station for the user equipment on the basis of the voice congestion levels and indicates the access point base station to the user equipment if the voice bearer has been established, and selects the access point base station for the user equipment on the basis of the data congestion levels and indicates the access point base station to the user equipment if the voice bearer has not been established.

Abstract: A radio control base station connected to a plurality of switching centers includes a capacity information receiving unit configured to receive capacity information from at least one of the plurality of switching centers, a load information receiving unit configured to receive load information from at least one of the plurality of switching centers, a selection ratio calculating unit configured to calculate a selection ratio for selecting a connection-target switching center to which a call from a mobile station is to be connected based on the received capacity information and the received load information, and a connection-target switching center determining unit configured to determine the connection-target switching center based on the calculated selection ratio.

Abstract: A mobile communication method according to the present invention including the steps of: generating, at a mobile station (UE), first verification information by use of a first key, a first parameter and an algorithm for “Integrity Protection”; generating, at the mobile station (UE), second verification information by extracting predetermined bits of the first verification information; and performing, at the mobile station (UE), cell selection processing, and transmitting, from the mobile station to a radio base station that manages the selected cell, an RRC-PDU for RRC connection re-establishment request through a common control channel, upon detection of a radio link failure in an RRC connection, the second verification information being set in the RRC-PDU for RRC connection re-establishment request.

Abstract: A radio base station determines at least any one type of subframe constituted of multiple system information subframes for sending system information to a mobile station, paging subframes for sending paging messages for the mobile station in idle mode, or on-duration subframes corresponding to on-durations at which the mobile station receives downlink control channel signals in discontinuous reception mode for the downlink control channel signals. The radio base station allocates, to the mobile station, inter-frequency measurement periods for inter-frequency measurement at the mobile station, while avoiding simultaneous occurrence of inter-frequency measurement periods and the subframes determined by the subframe determiner.

Abstract: In a method for managing cyclic shift codes used for reporting the CQI, when a new communication occurs between a base station and a mobile station, a cyclic shift code is allocated to the CQI report from the mobile station in accordance with a predetermined order of precedence. When the communication has ended or been disconnected, the cyclic shift code is released. In the allocating step, a cyclic shift code is allocated to the CQI report from the mobile station for the newly occurring communication, the allocated cyclic shift code having a precedence ranking that is lower than a precedence ranking of the allocated cyclic shift code allocated latest for the CQI report from another mobile station, being not used for CQI reports from other mobile stations, and having a highest precedence ranking in the predetermined order of precedence.

Abstract: A message broadcast system for broadcasting messages to user devices includes a cell broadcast center and a base station, the cell broadcast center including a first table associating the sender identifier of a message broadcast request with a message identifier information for identifying a message to be added to the message and corresponding to a priority for controlling the order of broadcast messages, and a transmission unit for transmitting a message including the message identifier information corresponding to the sender identifier to the base station, and the base station including a second table associating the message identifier information with a priority for controlling the order of broadcast messages, and a broadcast controlling unit for controlling the order of broadcast messages based on the priority corresponding to the message identifier information obtained from the message from the cell broadcast center.

Abstract: A base station apparatus including a reconnection request signal receiving unit configured to receive a reconnection request signal transmitted from a mobile apparatus, the reconnection request signal being for the mobile apparatus requesting reconnection to the base station apparatus, a status detection unit configured to detect whether a status of the mobile apparatus immediately before transmitting the reconnection request signal corresponds to a status where a frequency band measurement period is activated, the frequency band measurement period causing the mobile apparatus to measure a frequency band different from a frequency band for a radio access technology for use in radio communication between the mobile apparatus and the base station apparatus, a response signal generation unit configured to generate a response signal to the reconnection request signal, the response signal generation unit generating, if the status detection unit determines that the frequency band measurement period is activated, th

Abstract: A base station is disclosed.