Nec Corporation

Naoto Itaba

Masayuki Sakata

Sadafuku Hayashi

Seiji Kondo

Masahiko Kojima

Jun Nagata

Toshiyuki Tamura

Mayu Yamada

Yoshimasa Imamura

The present disclosure provides a radio station and a radio communication method capable of performing efficient control in Dual Connectivity. A radio station () includes: a classification unit () that classifies, when a data radio bearer is established with a communication terminal through a radio station (), the data radio bearer into one of a plurality of groups based on a predetermined classification condition; and a transmission unit () that transmits, to the radio station (), an establishment request message requesting establishment of the data radio bearer, and the group into which the data radio bearer is classified.

Radio station, radio communication method, non-transitory computer readable medium, and radio communication system

Provided is a handover originating base station which transmits data to a handover destination base station, for performing mobile communication terminal handover in a mobile communication system. The handover originating base station is provided with a means for transmitting data whose transmission is not confirmed by a communication terminal, with information which indicates data transmitted just before.

Base station, mobile communication system using the base station, and data transfer method

In a mobile communication system, the information on a downlink DCH actually not used is regarded as removable from the construction target of a TFI and a TFCI, so that a discrepancy of the perception regarding the TFI and the TFCI is not occurred between a base station and a UE (User Equipment). An indicator information in terms of an 'Unidirectional DCH Indicator' is generated in an Indicator processing portion of a RNC so that the base station can remove the information regarding the downlink DCH actually not used from the construction target of the TFI and the TFCI, and the information, which is included in the NBAP message, is transmitted to the base station from the NBAP message composition portion. When, at the NBAP message analyzing portion of the base station, it is determined that the 'Unidirectional DCH Indicator' is included in this message, the information regarding the downlink DCH actually not used in a TFCI construction portion is removed from the construction target of the TFI and the TFCI.

Mobile communication system and control method thereof and radio network controller and base station used for the same

The radio access network for allowing to construct a system abundant in scalability in a W-CDMA mobile communication system. A RNC in the radio access network is physically separated into a C plane control equipment for controlling signaling and a U plane control equipment for processing user data, where the user data is transferred between a mobile terminal and a host device via only the U plane control equipment and a control signal is terminated by the U plane control equipment and the C plane control equipment. This allows a system abundant in scalability to be constructed, and even in the case of soft handover across the C plane control equipments, also enables the continuous use of the same U plane control equipment, thereby eliminating the conventional connection path for connecting between RNCs and preventing delay due to passing through the RNCs.

Radio access network apparatus and mobile communication system using the same

A mobile communication system capable of efficiently updating software in a group of target terminals only when the software needs to be rewritten. When there is a mobile terminal (UE#, UE#) that needs the update of the software version, the server transmit an OTASP request that contains terminal type and software version information to GGSN. The OTASP request is forwarded via the GGSN, SGSN, and RNC to the mobile terminal (UE#, UE#). The mobile terminal (UE#, UE#) compares its type and software version with those contained in the paging channel, and if they match, transmits an RRC connection request to the RNC.

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Tokyo, Japan

Naoto Itaba