Sharp Kabushiki Kaisha Corporation

Sharp Kabushuki Kaisha

Suguru Toyokawa

Masafumi Aramoto

Takashi Murai

Hisao Kumai

Tohru Sugayama

Miki Amano

Manabu Kusaka

Masahiro Ohara

Reiko Aoyama

Hisao Kumia

Toru Sugayama

There are provided a communication system, a control apparatus, a router, and communication method thereof, there are capable of eliminating loss in packets during a handover and effectively releasing a resource of a router in a network base IP mobility protocol in which a mobile mode is movable without mounting a special protocol. When an MNas a mobile terminal is moved, a router at a movement destination, a mobile access gateway (MAG)bthat has received a router solicitation from the MNsends a location registration to a control apparatus, a local mobility anchor (LMA)and when the LMAdetermines as a handover, the LMAinstructs a router at a movement source, an MAGaor an MAGbto transfer a buffer from the MAGato the MAGb

Communication system using network base IP mobility protocol, control apparatus, router and communication method thereof

There are provided a communication system, a control apparatus, a router, and communication method thereof, there are capable of eliminating loss in packets during a handover and effectively releasing a resource of a router in a network base IP mobility protocol in which a mobile mode is movable without mounting a special protocol. When an MNas a mobile terminal is moved, a router at a movement destination, a mobile access gateway (MAG)bthat has received a router solicitation from the MNsends a location registration to a control apparatus, a local mobility anchor (LMA), and when the LMAdetermines as a handover, the LMAinstructs a router at a movement source, an MAGaor an MAGbto transfer a buffer from the MAGato the MAGb

The present invention provides a transmitting/receiving method capable of selecting a combination of communication media of the own and its counterpart reflecting the preference of the user or an application for each of flows on communication terminals and capable of doing execution without being known by counterpart the preference information. It presents means for selecting a combination of CoAs (the CoA of the communication counterpart and that of the own) of the Mobile IP referring to the preference information of the application when communication terminals transmit/receive one or more flows (data flows) through one or more paths (communication channels). In consideration of combinations of flows and paths, the score is calculated for the combinations, and transmitted to the counterpart terminal of the communication, the approval is obtained to select the optimum path. As a result, the CoA suitable to the preferences of both parties can be selected for each flow.

Transmitting/receiving method and program and recording medium

The present invention provides a communication system and a communication method for linking the switching of a transmission path with the switching of an application according to the change of a communication condition caused by the movement of a user in a mobile environment. A change of the communication condition caused by the movement of the user is always monitored and the transmission path is switched according to the state change of the transmission path. Here, the state of the transmission path between the terminal and the communication counter part terminal is obtained and compared to a priority reference for each of the applications, thereby selecting a transmission path appropriate for the application becomes possible and a service in corresponding to the communication condition can be provided by changing a content to that appropriate for the transmission path, simultaneously.

Communication system and communication terminal

A control system includes a first network including a controller, a second network including one or more controlled devicesto, and a translatorcorrelated with the first network and with the second network. The controlled devicecomprises a controlled device information management unitwhich manages controlled device information related to the controlled device; and a controlled device information communication unitwhich sends controlled device information with appropriate timing. The translatorcomprises a controlled device information proxy creating means which creates controlled device information proxiesbased on controlled device information acquired from controlled devices; and an information managing means for registering and managing controlled device information and controlled device information proxies. The controllercomprises a means which acquires controlled device information proxiesfrom the translatorand issues operating instructions for operating the controlled devicesto. With this control system, an operator at a remote operation center can easily and remotely control equipment belonging to a network different from a network to which the remote operation center belongs.

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Tokyo, Japan

Suguru Toyokawa