Abstract: A server apparatus, a mobile terminal, an electric appliance, a communication system, a communication method and a program for notifying a mobile terminal user in the open of the cause of a failure of P2P connection. In a communication system, an electric appliance (101), a server apparatus (103) and a mobile terminal (105) each detect a failure in preparation for P2P connection between the electric appliance (101) and the mobile terminal (105). When the electric appliance (101) detects the failure, it notifies the mobile terminal (105) of the failure via the server apparatus (103). When the server apparatus (103) detects the failure, it notifies the mobile terminal (105) of the failure. The mobile terminal (105) notifies the user of the failure detected by the mobile terminal itself or of the failure notified of by the server apparatus (103).

Abstract: A communication terminal apparatus wherein even if there occurs a dropout or overtaking of call control messages, the current service can be continued without increasing the load of an apparatus such as a server in the network. In this apparatus, a VoIP call control part (103) performs call controls including both a call establishment of a VoIP telephone conversation using a wireless LAN system and a call disconnection thereof. A line switching call control part (104) performs call controls including both a call establishment of a line switching telephone conversation using a mobile communication (cellular) system and a call disconnection thereof. A handover part (105) determines the reception quality of the wireless LAN system and that of the mobile communication (cellular) system and controls, based on the determination results, the handover between the wireless LAN system and the mobile communication (cellular) system.

Abstract: A server apparatus, a mobile terminal, an electric appliance, a communication system, a communication method and a program for notifying a mobile terminal user in the open of the cause of a failure of P2P connection. In a communication system, an electric appliance (101), a server apparatus (103) and a mobile terminal (105) each detect a failure in preparation for P2P connection between the electric appliance (101) and the mobile terminal (105). When the electric appliance (101) detects the failure, it notifies the mobile terminal (105) of the failure via the server apparatus (103). When the server apparatus (103) detects the failure, it notifies the mobile terminal (105) of the failure. The mobile terminal (105) notifies the user of the failure detected by the mobile terminal itself or of the failure notified of by the server apparatus (103).

Abstract: A server apparatus, a mobile terminal, an electric appliance, a communication system, a communication method and a program for notifying a mobile terminal user in the open of the cause of a failure of P2P connection. In a communication system, an electric appliance (101), a server apparatus (103) and a mobile terminal (105) each detect a failure in preparation for P2P connection between the electric appliance (101) and the mobile terminal (105). When the electric appliance (101) detects the failure, it notifies the mobile terminal (105) of the failure via the server apparatus (103). When the server apparatus (103) detects the failure, it notifies the mobile terminal (105) of the failure. The mobile terminal (105) notifies the user of the failure detected by the mobile terminal itself or of the failure notified of by the server apparatus (103).

Abstract: A communication system and communication apparatus that can improve the stability and security of communication. In this communication system, a communication apparatus (101) generates, at a predetermined interval, a keep-alive message based on key information stored in a key information database part (113) and transmits the keep-alive message to a communication apparatus (102). The communication apparatus (102) receives the keep-alive message from the communication apparatus (101), and a key information updating part (157) updates (for example, corrects), based on this keep-alive message, the data stored in a key information database part (154).

Abstract: Mobile wireless communication system 100 of the present invention has virtual private network relay apparatus 105 which establishes an IPsec tunnel with network relay apparatus 104 installed on private network 102 via public network 101, further establishes the IPsec tunnel with mobile wireless terminal apparatus 110 and relays connection of mobile wireless terminal apparatus 110 from public wireless LAN system 103 to private network 102, connection authentication server 108 that authenticates connection of mobile wireless terminal apparatus 110 to public wireless LAN system 103, and wireless LAN access point 109 that relays connection authentication procedures of public wireless LAN 107 performed between mobile wireless terminal apparatus 110 and connection authentication server 108.

Abstract: A communication terminal apparatus wherein even if there occurs a dropout or overtaking of call control messages, the current service can be continued without increasing the load of an apparatus such as a server in the network. In this apparatus, a VoIP call control part (103) performs call controls including both a call establishment of a VoIP telephone conversation using a wireless LAN system and a call disconnection thereof. A line switching call control part (104) performs call controls including both a call establishment of a line switching telephone conversation using a mobile communication (cellular) system and a call disconnection thereof. A handover part (105) determines the reception quality of the wireless LAN system and that of the mobile communication (cellular) system and controls, based on the determination results, the handover between the wireless LAN system and the mobile communication (cellular) system.

Abstract: According to the present invention, in an integrated wireless communication system composed of a wireless LAN system 200 in which wireless communication is performed with mobile terminals 400 of a wireless LAN area 204, and a cellular system 100 that is linked to this wireless LAN system 200 via exchange equipment 300, a request from an external terminal for communication with a mobile terminal 400 or a request from a mobile terminal 400 for communication with an external terminal is received, and a communication path is selected and communication performed either via the cellular system 100 or via the wireless LAN system 200 according to this communication request.

Abstract: A mobile terminal and a home-use information product capable of retaining the security even under a network attack, while achieving P2P connection. When detecting a network attack, a home-use information product (104) notifies a mobile terminal (102) of the network attack. When receiving the notification, the mobile terminal (102) closes the port of a P2P connection part (121), requests the home-use information product (104) to close its port, and causes the home-use information product (104) to close the P2P connection port of a NAT router (103).

Abstract: A server apparatus, a mobile terminal, an electric appliance, a communication system, a communication method and a program for notifying a mobile terminal user in the open of the cause of a failure of P2P connection. In a communication system, an electric appliance (101), a server apparatus (103) and a mobile terminal (105) each detect a failure in preparation for P2P connection between the electric appliance (101) and the mobile terminal (105). When the electric appliance (101) detects the failure, it notifies the mobile terminal (105) of the failure via the server apparatus (103). When the server apparatus (103) detects the failure, it notifies the mobile terminal (105) of the failure. The mobile terminal (105) notifies the user of the failure detected by the mobile terminal itself or of the failure notified of by the server apparatus (103).

Abstract: A mobile radio communication system (100) includes: a virtual private network relay device (105) for establishing an Ipsec tunnel with a network relay device (104) arranged in a private network (102) via a public network (101) and establishing an Ipsec tunnel with a mobile radio terminal device (110), thereby relaying connection from a public radio LAN system (103) of a mobile radio terminal device (110) to a private network (102); a connection authentication server (108) for authenticating the connection to the public radio LAN system (103) of the mobile radio terminal device (110); and a radio LAN access point (109) for relaying the connection authentication procedure of the public radio LAN (107) performed between the mobile radio terminal device (110) and the connection authentication server (108).

Abstract: A communication system and communication apparatus that can improve the stability and security of communication. In this communication system, a communication apparatus (101) generates, at a predetermined interval, a keep-alive message based on key information stored in a key information database part (113) and transmits the keep-alive message to a communication apparatus (102). The communication apparatus (102) receives the keep-alive message from the communication apparatus (101), and a key information updating part (157) updates (for example, corrects), based on this keep-alive message, the data stored in a key information database part (154).

Abstract: There are provided a report system, a mobile terminal device, and a server device capable of improving the reliability of report to a user. In the report system, an address management server device (105) acquires the latest address information on a mobile terminal device (101). A home server device (109) stores (holds) content information from an electric device (110) and performs control to acquire address information on the mobile terminal device from the address management server device (105). The home server device (109) transmits the stored content information from the address management server device (105) to the mobile terminal device (101) specified by the address information acquired from the address management server device (105). The mobile terminal device (101) receives the content information transmitted from the home server device (109) and reports the content of the content information.

Abstract: There are disclosed a server apparatus, an electric device, a mobile terminal and so on that reduce the processing load of a server and also reduce the bands used for access lines connected by the server to the Internet. According to the apparatus, an electric device (101) receiving an invocation request from a mobile terminal (105) changes the settings of an NAT router (102) and acquires and transmits information of the setting as changed and an Internet side global IP address of the NAT router (102) to the mobile terminal (105), which uses these information to transmit a P2P session establishment request to the electric device (101), thereby establishing a session between the mobile terminal (105) and the electric device (101).

Abstract: A communication terminal apparatus, an electric device and so on that apply an appropriate protocol. A message, which includes a protocol type designated by an electric device (102) with which a mobile telephone (101) is to directly connect and also includes the address and setting information of an NAT router (103) connected to the electric device (102), is transmitted from a server apparatus (104) disposed on the Internet to the mobile telephone (101). Then, the mobile telephone (101) applies, out of acquired protocol types, a protocol used to connect with the electric device (102), and uses the address and setting information of the NAT router (103) to connect with the electric device (102) via the NAT router (103).

Abstract: In the present invention, a position managing server on a wireless network using a wireless system without a paging function requests paging of a mobile terminal to a terminal managing server on a cellular network using a cellular wireless system, the terminal managing server transmits a paging request to the mobile terminal using the cellular network, and the mobile terminal receives the paging request, connects a wireless channel with the wireless network, requests an assignment of position information to the wireless network to acquire, and notifies the position managing server on the wireless network of the position information acquired.

Abstract: Respective location information of wireless terminal apparatuses 30-1 to 30-4 and service area information of each of wireless LAN networks 2-1 to 2-n is managed, and authentication information is notified to authentication apparatus 20 of a wireless LAN network before each wireless terminal apparatus moves to the wireless LAN network around the current location of the wireless terminal apparatus. The authentication time is thus shortened in migration inside the same wireless LAN network or between different wireless LAN networks of the wireless terminal apparatus, thereby reducing the interval required for handover, and as a result, quality deterioration does not occur such as packet loss due to the handover.

Abstract: In the present invention, a position managing server on a wireless network using a wireless system without a paging function requests paging of a mobile terminal to a terminal managing server on a cellular network using a cellular wireless system, the terminal managing server transmits a paging request to the mobile terminal using the cellular network, and the mobile terminal receives the paging request, connects a wireless channel with the wireless network, requests an assignment of position information to the wireless network to acquire, and notifies the position managing server on the wireless network of the position information acquired.

Abstract: According to the present invention, in an integrated wireless communication system composed of a wireless LAN system 200 in which wireless communication is performed with mobile terminals 400 of a wireless LAN area 204, and a cellular system 100 that is linked to this wireless LAN system 200 via exchange equipment 300, a request from an external terminal for communication with a mobile terminal 400 or a request from a mobile terminal 400 for communication with an external terminal is received, and a communication path is selected and communication performed either via the cellular system 100 or via the wireless LAN system 200 according to this communication request.