Sony Corporation

Kazuhiro Shitama

Kuniaki Kurihara

Shin Saito

Seiji Miyama

Fumio Teraoka

Akimichi Ogawa

Tatsuya Igarashi

Mitsuru Takehara

Norifumi Kikkawa

Itaru Kawakami

Atsushi Onoe

Kazuko Yamada

Provided is a server apparatus including a storing unit that stores a correspondence between terminal information of one or more information processing terminals connected via a network and one or more pieces of display control information associated with display screens of the information processing terminals; an adding unit that adds a new correspondence between the terminal information of the information processing terminal and the display control information to the storing unit in response to a user operation of at least one information processing terminal; an image data generating unit that generates image data to be displayed on the display screen of the information processing terminal based on the correspondence stored in the storing unit when an access from at least one information processing terminal is made; and a transmitting unit that transmits the image data generated by the image generating unit to the information processing terminal that has made the access.

Server apparatus, information processing method, and information processing system

There is provided an information processing unit including an application execution section to execute an application to request establishment of an HTTP tunneling connection with a connection target unit, a connection establishment section to set a maximum content length settable with the connection target unit, establish an HTTP tunneling connection with the specified content length with the connection target unit via a connected proxy server and update the HTTP tunneling connection with the specified content length a plurality of times upon closure of the established connection, and a connection management section to manage connection status of each of a plurality of HTTP tunneling connections and make the application execution section recognize the plurality of HTTP tunneling connections as one virtual HTTP tunneling connection.

Information processing unit, information processing method, remote server, and information processing system

A communication terminal apparatus of a mobile type performs data transmission/reception via a network and changes access points based on data receiving conditions. The communication terminal apparatus is configured to acquire a MAC address of a next access point to which a communication terminal apparatus is scheduled to be connected next, broadcast a handover start message containing the acquired MAC address of the next access point, and perform a handover process on condition that the communication terminal apparatus receives a handover setting completion message from a data forwarding controller as a response to the handover start message.

Data forwarding controller, communication terminal apparatus, data communication system and method, and computer program for performing handover for a mobile node

A communication processing apparatus that acts as a server for transmitting data to a client includes a data transceiver configured to carry out communications with the client; a rate controller configured to control a bitrate of data transmitted to the client; and a data processor configured to prepare data to transmit in accordance with the bitrate. The rate controller includes a throughput calculator configured to extract an effective data transmission and reception period not including an ineffective data transmission and reception period in a period during which a communication connection is maintained between the server and the client, and to calculate a maximum throughput on the basis of the length of the effective data transmission and reception period and the amount of data transmitted; and a bitrate setter configured to set a bitrate within a range of up to a maximum allowable bitrate corresponding to the maximum throughput calculated by the throughput calculator.

Communication processing apparatus, data communication system, and communication processing method

Disclosed herein is a content distribution system including: a content distribution server; a sender terminal; and a receiver terminal; wherein the content distribution server including a communication block; a recording block; a content management block; a content encryption block; and a key management block; wherein the sender terminal including a communication block; a terminal detection block; a recording block; and an extraction block; wherein the receiver terminal including a terminal detection block; a recording block; a decryption block; and a content reproduction block; wherein, if the sender terminal is located inside a communicable range in which data can be transmitted and received with the receiver terminal, the sender terminal distributes the content and the receiver terminal, if located inside the communicable range, reproduces the decrypted content.

Content distribution system and content distribution method

A virtual network prefix is provided as a dedicated prefix for a mobile node in a domain having a plurality of subnets. The domain includes a layered network that has a quasi-micro mobility network (QMMN) and a pure-micro mobility network (PMMN). The quasi-micro mobility network (QMMN) performs prefix-based routing, and the pure-micro mobility network (PMMN) performs routing using two different routing protocols, that is, prefix-based routing and host-based routing. In each network, processing for changing a route, such as changing cache data or the like, is performed depending on how a terminal moves.

Communication processing system, communication processing method, communication terminal, data transfer controller, and program

An apparatus and method that being capable of implementing uninterrupted communication during performing a handover process by a mobile node are provided. A mobile node transmits a handover start message containing address information of a destination access point, to a switch as a data forwarding controller, and the switch adds an entry to a MAC learning table based on the address contained in the message. The switch forwards packets addressed to the mobile node to a current access point of the mobile node as well as to its destination access point in parallel based on the entries in the MAC learning table. The mobile node can receive data packets at once upon connection to the new access point after having performed a handover.

Data forwarding controller communication terminal apparatus, data communication system and method, and computer program

In order to easily and promptly make a connection to a station which a user desires and in a good communication condition, there is provided a communication apparatus applicable to a PDA having a wireless communication function, which includes setting means for setting a priority order of wireless communication stations, acquisition control means for controlling acquisition of RSSI (Receive Signal Strength Indication) of each of the stations, and connection control means for controlling a connection to one of the station having a highest priority order among the stations whose RSSI exceeds a predetermined threshold.

Communication apparatus and method, and program thereof

In a communication system for a mobile node according to IPv6, a virtual network prefix is configured as a prefix specific to a mobile node in a domain having a plurality of subnetworks. In the domain, a packet is sent to the mobile node by host-based routing on an IPv6 address formed of the virtual network prefix and an interface ID. The communications process with the mobile node which cannot identify a virtual network prefix is performed using a physical network prefix according to IPv6. Accordingly, nodes which can and cannot identify a virtual network prefix can coexist in the domain.

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Chiba, Japan

Kazuhiro Shitama