Communication device

• US 8,488,569 B2
• Filed: 06/23/2005
• Issued: 07/16/2013
• Est. Priority Date: 05/27/2003
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Oda, Sotaro, Kitada, Atsushi
• Primary Examiner(s): Jagannathan, Melanie
• Application Number:
  US11/159,807
• Publication Number:
  US 20050286503A1
• Time in Patent Office: 2,945 Days
• Field of Search: 370310-314, 3703951-39572, 370351-356
• US Class Current: 370/338
• CPC Class Codes: H04L 12/2859 Point-to-point connection between the data network and the subscribers encapsulation H04L12/4633; virtual LANs H04L12/4641; routing of packets H04L45/00
• CPC Class Codes: H04L 12/2898 Subscriber equipments DSL modems H04M11/062; cable modems H04L12/2801
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• CPC Class Codes: H04L 61/10 of different types
• CPC Class Codes: H04L 61/2596 Translation of addresses of the same type other than IP, e.g. translation from MAC to MAC addresses
• CPC Class Codes: H04L 61/45 Network directories; Name-to-address mapping
• CPC Class Codes: H04L 61/50 Address allocation
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/162 at the data link layer
• CPC Class Codes: H04L 67/14 Session management for real-time applications in data packet communications networks H04L65/1066
• CPC Class Codes: H04L 67/146 Markers for unambiguous identification of a particular session, e.g. session cookie or URL-encoding

Abstract

A communication device of the present invention performs communication over a network where a session is identified based on a source address set in a frame. The communication device comprises an interface unit for connecting to the network, a management unit for managing a plurality of addresses, a request unit for transmitting a frame including a session establishment request to an authenticator system provided on the network through said interface unit, and an address setting unit for setting one of the plurality of addresses managed by said management unit as a source address of the frame including the session establishment request.

Claims

1. A user terminal which performs communication over a network where a session is identified based on a source address set in a frame, comprising:

a memory to store a session management table to manage a plurality of physical addresses assigned to the user terminal;

a physical port to connect to the network;

a plurality of logical ports each being assigned with a distinct address selected from the plurality of physical addresses; and

a processor

to transmit a frame including a session establishment request to an authenticator system provided on the network through said physical port and

to set one of the plurality of physical addresses assigned to the user terminal to a source address of the frame including the session establishment request, the source address being free of assignment to any established session

to receive a notification of success in an authentication from the authenticator system;

to update the session management table to manage corresponding relations between a new session established by the success in the authentication and information for identifying the logical port assigned with the physical address included in the session establishment request; and

to transmit another frame utilizing the new session through the logical port corresponding to the new session by referring to the session management table.

2. The user terminal according to claim 1, wherein

said processor, when a session requested using the session establishment request is authorized by the authenticator system, to manage a communication condition specified in the session establishment request corresponding to the address set in the frame including the session establishment request.

3. The user terminal according to claim 2, wherein

said processor is further configured to analyze contents of a transmission frame transmitted from the user terminal after the corresponding relations are stored in the session management table, and to search for a communication condition by referring to said session management table using a result of said analysis, to select an address corresponding to the search result;

and to set the address selected as the source address of the transmission frame.

4. The user terminal according to claim 2, wherein

a source IP address is used as the communication condition.

5. The user terminal according to claim 2, wherein

a port number is used as the communication condition.

6. The user terminal according to claim 1, wherein

each of the plurality of the addresses managed by said session management table is MAC address.

7. A user terminal which performs communication over a network where a session is identified based on a source address set in a frame, comprising:

a physical port coupled to the network;

a memory to store a session management table to manage corresponding relations between one of plurality of logical ports each being assigned with a distinct physical address and a source IP address specified in a session establishment request included in a frame transmitted by using the logical ports; and

a processor to detect the source IP address of a transmission frame, and to select a logical port corresponding to the detected source IP address, to set the physical address assigned to the logical port as the source address of the transmission frame, and to transmit the transmission frame to the network through the physical port.

9. The user terminal according to claim 7, wherein

a distinct MAC address is assigned to each of the plurality of the logical ports.

8. A user terminal which performs communication over a network where a session is identified based on a source address set in a frame, comprising:

a physical port coupled to the network;

a memory to store a session management table to manage corresponding relations between one of a plurality of logical ports, each being assigned with a distinct physical address, and a port number specified in a session establishment request included in a frame transmitted by using the logical ports; and

a processor to detect the port number of a transmission frame, and to select a logical port corresponding to the detected port number, to set the physical address assigned to the selected logical port as the source address of the transmission frame, and to transmit the transmission frame to the network through the physical port.

10. The user terminal according to claim 8, wherein

a distinct MAC address is assigned to each of the plurality of the logical ports.