Abstract: A gist of the present invention lies in a method for esterification of a polyvinyl alcohol-based resin, wherein a vinyl ester is used as an esterifying agent in a method for esterification of a polyvinyl alcohol-based resin by an esterification reaction using an esterifying agent. The esterification method can esterify the polyvinyl alcohol-based resin at a high reaction rate under mild reaction conditions using relatively simple reaction equipment, and is also applicable to a wide variety of polyvinyl alcohol-based resins without being restricted by polymerization and saponification degrees of the polyvinyl alcohol-based resin. Thus, it is possible to provide a modified polyvinyl alcohol-based resin having excellent physical properties such as polymerization and modification degrees, which is applicable to various applications.

Abstract: A controller which is assigned with the wireless resources for a plurality of wireless zones and a plurality of wireless base stations communicably connected to the controller, wherein the controller is operable to assign a part of the assigned wireless resources to the wireless zone formed by any of the wireless base stations. According to this, it is possible to introduce and run a great number of wireless base stations at a low cost without increasing or modifying the number of the superordinate devices such as RNC.

Abstract: A base station accommodation method and mobile communication system which allows the installation of many micro-miniature BTS devices are provided. The mobile communication system includes a plurality of base stations which accommodate a plurality of mobile terminals respectively; a plurality of first base station control devices, each of which accommodates a predetermined number of base stations out of the plurality of base stations; and a second base station control device which accommodates the plurality of first base station control devices, wherein each of the plurality of first base station control devices comprises, for supporting information identifying a mobile terminal, a mobile terminal data base to store identification information which identifies a base station to which the mobile terminal is subordinate, and a station data base to store an address of the base station.

Abstract: It administers a plurality of wireless base stations grouped into a plurality of groups, and performs the processing about the management, control and maintenance of the wireless base stations selectively for each of the groups. This enables the efficient management, control and maintenance processing of the wireless base stations.

Abstract: A mobile terminal UE accesses a CN and utilizes the Internet via a base station Node-B. When riding an electric train, the mobile terminal UE receives a disembarkation notification and an embarkation notification from a RFID tag writer equipped on a train, and notifies the base station Node-B that the terminal is on-board the train. While on-board the train, the terminal accesses an in-vehicle AP by employing a WLAN, Bluetooth, or similar system, and the in-vehicle AP communicates with the base station Node-B. This configuration enables the in-vehicle AP to handle all of the mobile devices existing on a train in a centralized manner, thereby eliminating the need for each of the mobile devices to individually access the base station Node-B.

Abstract: An algorithm in a multi-core processor having a plurality of cores for deciding processing allocation to each core to distribute the processing load thereof, and an efficient processing allocation algorithm simplified for software engineers are established. In order to achieve the above processing load distribution, the multi-core processor includes a plurality of basic modules divided into minimum configuration units, each having a uniform input/output format interface, so as to perform required processing contents in the overall processor. As an initial allocation, the above plurality of basic modules are allocated in distribution to the above plurality of cores, and subsequently, based on functional information of each core, the above plurality of initially allocated basic modules are relocated either periodically or at appropriate timing.

Abstract: A data center includes an individual storage unit having storage areas for respective user apparatuses, a shared storage unit having a storage area for sharing by the user apparatuses, a unit configured to store data received from an external node in one of the individual storage unit and the shared storage unit that is selected according to predetermined criteria, a unit configured to generate a data arrangement list according to statistics of the received data and predetermined cache data arrangement conditions, and a unit configured to transmit an instruction signal to at least one of the shared storage unit and the individual storage unit according to the data arrangement list to cause data stored in the at least one of the shared storage unit and the individual storage unit to be transferred to a cache server provided on a core network or on a radio access network.

Abstract: To provide a technique of making it possible to shorten a time taken by channel switching. Further, to provide a technique of enabling simplification of a channel switching procedure. A radio network controller for assigning, to each wireless terminal connected to a wireless network, one of an individual channel exclusively used by the wireless terminal and a common channel shared with at least one wireless terminal different from the wireless terminal as a communication channel, includes: a determination portion for determining that an individual channel is to be assigned to a wireless terminal; and an assignment portion for, when the assignment of the individual channel has been determined, assigning an individual channel resource secured and held before the determination to the wireless terminal.

Abstract: A radio communication terminal including first transmission/reception means for transmitting and receiving first communication data which can be communicated by a first communication protocol, and communication data input/output means for inputting and outputting the first communication data, comprising second transmission/reception means for transmitting and receiving second communication data which can be communicated by a second communication protocol different from the first communication protocol, and protocol conversion means for converting between the first communication data and the second communication data and visa versa, in which the communication data input/output means outputs the first communication data which has been received by the second transmission/reception means as the second communication data and has been converted from the second communication data into the first communication data by the protocol conversion means, and the second transmission/reception means transmits the second commu