FILE SERVER DEVICE

• US 20080089349A1
• Filed: 09/27/2007
• Published: 04/17/2008
• Est. Priority Date: 10/11/2006
• Status: Active Grant

• Current Assignee: Murata Machinery Limited (Muratec)
• Original Assignee: Murata Machinery Limited (Muratec)
• Inventors: TANIMOTO, Yoshifumi
• Granted Patent: US 8,316,134 B2
• Time in Patent Office: Days
• US Class Current: 370/401
• CPC Class Codes: H04L 65/1045 Proxies, e.g. for session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1073 Registration or de-registration
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/141 Setup of application sessions admission control or resource allocation in data switching networks H04L47/70
• CPC Class Codes: H04L 67/148 Migration or transfer of sessions
• CPC Class Codes: H04L 67/563 Data redirection of data network streams
• CPC Class Codes: H04L 67/63 Routing a service request depending on the request content or context

Abstract

Communication is established between communication terminals arranged in different LANS while realizing dynamic response to reduction in server load, movement of communication terminal, and the like. A relay server is arranged in a LAN and can communicate with an SIP server arranged in a WAN. For instance, a first relay server exchanges account information of the communication terminals in the respective LAN with a second relay server. If exchanged account information is changed in one relay server, the account information after the change is notified to the other relay server. One relay server determines the other relay server based on the exchanged account information and relays communication data between the communication terminals through the other relay server.

Claims

1. A relay server arranged in a local area network and being communicable with an external server arranged in a wide area network;

the relay server comprising;

a local account information registering section arranged to register account information of a communication terminal in the local area network;

a relay server account information registering section arranged to register the relay server account information in the external server;

an another relay server registering section arranged to register another relay server registered in the external server and to establish a relay communication session that is directly communicable with the other relay server;

an account information exchange section arranged to exchange account information held in the local account information registering section with the other relay server;

a change notification setting section arranged to request, when account information held in the other relay server is changed, the other relay server to transmit the account information after a change;

a determining section arranged to determine, when receiving a communication request in which an account of a communication terminal in another local area network is specified from the communication terminal in the local area network, another relay server in which the specified account is registered from the account information exchanged with the other relay server; and

a relay section arranged to relay communication data between the communication terminal and the other communication terminal through a relay communication session with the determined other relay server.

2. The relay server according to claim 1, wherein whether or not to request transmission of the account information after a change when the account information of the other relay server is changed is specifiable when establishing the relay communication session that is directly communicable with the other relay server.

3. The relay server according to claim 1, wherein whether or not to include the account information to be registered in the account information to be transmitted to the other relay server is specifiable when registering the account information from the communication terminal of the local area network.

4. The relay server according to claim 2, wherein whether or not to include the account information to be registered in the account information to be transmitted to the other relay server is specifiable when registering the account information from the communication terminal of the local area network.

5. A relay server arranged in a local area network and being communicable with an external server arranged in a wide area network;

the relay server comprising;

an exchanging section arranged to exchange relay information related to a relay communication session with another relay server arranged in another local area network; and

a detecting section arranged to detect whether or not a relay communication session that is directly communicable with the other relay server arranged in the other local area network is established when relaying communication data to a communication terminal in the other local area network;

wherein

when it is detected that the relay communication session that is directly communicable with the other relay server is not established, the communication data is indirectly relayed through another further relay server, to which a relay communication session is established, based on the relay information exchanged by the exchanging section.

6. The relay server according to claim 5, further including:

a local account information registering section arranged to register account information of a communication terminal in the local area network;

a relay server account information registering section arranged to register rely server account information in the external server;

an another relay server specifying section arranged to specify another relay server registered in the external server and to establish a relay communication session that is directly communicable with the other relay server;

a relay information registering section arranged to register relay information including relay path information of the established relay communication session;

an account information exchange section arranged to exchange account information held in the local account information registering section with the other relay server;

a relay information exchange section arranged to exchange the relay information held by the relay information registering section with the other relay server;

a change notification setting section arranged to request, when the relay information held by the other relay server is changed, the other relay server to transmit the relay information after change;

a determining section arranged to determine, when receiving a communication request in which an account of another communication terminal is specified from the communication terminal in the local area network, another relay server in which the specified account is registered from the account information exchanged with the other relay server, and to detect whether or not a directly communicable relay communication session is established with the determined other relay server; and

a relay path determining section arranged to determine a relay path from the relay information if the directly communicable relay communication session is not established, and to relay the communication data between the communication terminals through a relay communication session with another relay server on the relay path.

7. The relay server according to claim 6, wherein whether or not to request transmission of the relay information after a change if the relay information of an opposing relay server is changed is specifiable when establishing the relay communication session directly communicable with the other relay server.

8. The relay server according to claim 6, wherein whether or not to include the relay path information formed by the communication session in the relay information is specifiable when establishing a directly communicable relay communication with the other relay server.

9. The relay server according to claim 7, wherein whether or not to include the relay path information formed by the communication session in the relay information is specifiable when establishing a directly communicable relay communication with the other relay server.

10. A relay server arranged in a local area network and being communicable with an external server arranged in a wide area network;

the relay server comprising;

an account registering section arranged to register account information of a communication terminal in the local area network;

a relay server account registering section arranged to register relay server account information in the external server;

an another relay server specifying section arranged to specify another relay server registered in the external server and to establish a relay communication session that is directly communicable with the other relay server;

an exchange section arranged to exchange held account information with the other relay server;

a registering section arranged to register group information in which account information of the communication terminals are grouped; and

a judging section arranged to judge, when receiving a communication request in which an account of another communication terminal is specified from the communication terminal in the local area network, whether or not both communication terminals are registered in a same group based on the held group information, and to determine a relay server based on the held account information if both communication terminals are registered in the same group, and to relay communication data between the communication terminals through a relay communication session with the determined relay server.

11. The relay server according to claim 10, further including a requesting section arranged to request the other relay server to transmit the group information when the relay server does not hold the group information.

12. The relay server according to claim 10, further including a requesting section arranged to request, when the group information held by the relay server is changed, the other relay server to transmit the group information after change.

13. The relay server according to claim 10, further including a communication section arranged to accept a communication request of the group information from the communication terminal and to extract and transmit the group information related to the communication terminal.

14. The relay server according to claim 10, further including a receiving section arranged to receive the group information from the communication terminal and to update the held group information.