Source: http://www.google.com/patents/US7477620?dq=6,418,462
Timestamp: 2018-01-18 11:03:40
Document Index: 228116253

Matched Legal Cases: ['Application No. 2003', 'Application No. 2003', 'Application No. 2003', 'Application No. 2003', 'Application No. 2003', 'Application No. 2003', 'Application No. 2003', 'Application No. 2002', 'Application No. 2004', 'Application No. 2004', 'Application No. 2004', 'Application No. 2004', 'Application No. 2004', 'Application No. 2004', 'Application No. 2004', 'Application No. 2005']

Patent US7477620 - Managing network information in access routers (ARs) - Google Patents
Managing network information in Access Routers (ARs) includes: communicating with neighboring Access Routers (ARs) to obtain information of each of the ARs and Access Points (APs) belonging to a subnet of a relevant AR; storing the information of the ARs and APs in a database; and performing a communication...http://www.google.com/patents/US7477620?utm_source=gb-gplus-sharePatent US7477620 - Managing network information in access routers (ARs)
Publication number US7477620 B2
Application number US 11/035,892
Also published as CN1658571A, EP1564939A1, US20050180355
Publication number 035892, 11035892, US 7477620 B2, US 7477620B2, US-B2-7477620, US7477620 B2, US7477620B2
Patent Citations (28), Non-Patent Citations (7), Referenced by (4), Classifications (20), Legal Events (5)
Managing network information in access routers (ARs)
US 7477620 B2
28. The AR according to claim 27, wherein the AP state headers respectively comprise an effective time period of the packet, option information, a length, an address of a transmitting AR, and a sequence number.
Reverse address translation: a function of mapping the L2 ID of an AP to an IP address of the AR to which this AP belongs. The MN receives a beacon signal to perform handoff, and this signal includes the L2 ID of the AP. By sending the L2 ID to the current AR, the mobile node requests an IP address of an AR in a new region into which the MN will move. Through such processes, a series of tasks for reducing the handoff delay take place.
Discovery of Current Access Router (CAR) capabilities: in order to perform optimal handoffs, a CAR provides information on allowing an MN to select a suitable CAR by providing information on the CAR to the MN. Information on the IP service, which will be provided, includes services in which the MN may be interested in upon selecting the CAR, for example, seamless handoff support, security functions, wireless performance enhancing functions, administrative and business aspects of providing service to the MN (service provider, cost of access, etc.), availability of certain type of resources with the AR (QoS), etc. The CARD protocol must provide a function of exchanging capability information on the AR.
The following patents each discloses features in common with the present invention but do not teach or suggest the inventive features specifically recited in the present claims: U.S. Patent Application No. 2003/0227911 to Trossen, entitled CANDIDATE ACCESS ROUTER DISCOVERY, issued on 11 Dec. 2003; U.S. Patent Application No. 2003/0223422 to Igarashi et al., entitled PACKET TRANSMISSION METHOD AND COMMUNICATION SYSTEM, issued on Dec. 4, 2003; U.S. Patent Application No. 2003/0220111 to Kang, entitled DSL MOBILE ACCESS ROUTER SYSTEM AND METHOD, issued on Nov. 27, 2003; U.S. Patent Application No. 2003/0179703 to Levy et al., entitled AUTOMATIC ROUTER CONFIGURATION BASED ON TRAFFIC AND SERVICE LEVEL AGREEMENTS, issued on 25 Sep. 2003; U.S. Patent Application No. 2003/0174667 to Krishnamurthi et al., entitled METHOD AND APPARATUS FOR ALERTING MOBILE NODES OF DESIRABLE ACCESS CHARACTERISTICS, issued on Sep. 18, 2003; U.S. Patent Application No. 2003/0091021 to Trossen et al., entitled PHYSICALLY SCOPED MULTICAST IN MULTI-ACCESS NETWORKS, issued on May 15, 2003; U.S. Patent Application No. 2003/0046413 to Sakakura, entitled NETWORK SYSTEM DYNAMICALLY MADE FOR A SHORT-DISTANCE WIRELESS COMMUNICATION AND NETWORK STRUCTURING METHOD, issued on Mar. 6, 2003; U.S. Patent Application No. 2002/0052964 to Ferner et al., entitled METHOD AND DEVICE FOR DATA COMMUNICATION, issued on May 2, 2002; U.S. Patent Application No. 2004/0114558 to Krishnamurthi et al., entitled END-TO-END LOCATION PRIVACY IN TELECOMMUNICATIONS NETWORKS, issued on Jun. 17, 2004; U.S. Patent Application No. 2004/0092264 to Koodli et al., entitled SYSTEM AND METHOD FOR DISCOVERING NETWORK INTERFACE CAPABILITIES, issued on May 13, 2004; U.S. Patent Application No. 2004/0023653 to O'Neill, entitled CONTROLLING HAND-OFF IN A MOBILE NODE WITH TWO MOBILE IP CLIENTS, issued on Feb. 5, 2004; U.S. Patent Application No. 2004/0004967 to Nakatsugawa et al., entitled MOBILE COMMUNICATION SYSTEM, ROUTER, MOBILE NODE, AND MOBILE COMMUNICATION METHOD, issued on Jan. 8, 2004; U.S. Patent Application No. 2004/0022258 to Tsukada et al., entitled SYSTEM FOR PROVIDING ACCESS CONTROL PLATFORM SERVICE FOR PRIVATE NETWORKS, issued on 5 Feb. 2004; U.S. Patent Application No. 2004/0139224 to Nishimura et al., entitled MOBILE COMMUNICATION SYSTEM, SERVER APPARATUS, AND DATA TRANSMISSION METHOD, issued on Jul. 15, 2004; and U.S. Patent Application No. 2004/0137888 to Ohki, entitled SYSTEM FOR MANAGING MOBILE NODE IN MOBILE NETWORK, issued on Jul. 15, 2004.
US20020052964 Jul 24, 2001 May 2, 2002 Ferner Carl Johan Method and device for data communication
US20030220111 May 12, 2003 Nov 27, 2003 Kang Ki Bong DSL mobile access router system and method
US20030227911 Mar 27, 2003 Dec 11, 2003 Dirk Trossen Candidate access router discovery
US20040004967 Jun 19, 2003 Jan 8, 2004 Keiichi Nakatsugawa Mobile communication system, router, mobile node, and mobile communication method
US20040092264 Nov 12, 2002 May 13, 2004 Rajeev Koodli System and method for discovering network interface capabilities
US20040139224 Sep 16, 2003 Jul 15, 2004 Ntt Docomo, Inc. Mobile communication system, server apparatus, and data transmission method
EP1343277A2 Mar 6, 2003 Sep 10, 2003 NTT DoCoMo, Inc. Handover control apparatus, relay router, gateway apparatus, access router, base station, mobile commucation system and handover control method
JP2003188894A Title not available
1 Dirk Trossen et al.: "A Dynamic Protocol for Candidate Access-Router Discovery" Draft-Trossen-Seamoby-Dycard-01.TXT, Mar. 14, 2003.
2 Document by Eunsoo Shim, Jens-Peter Redlich, and Richard D. Gitlin, entitled Secure Candidate Access Router Discovery, WCNC 2003, pp. 1819-1824, published on Mar. 16, 2003.
3 Eunsoo Shim, Jens-Peter Redlich, Richard D. Gitlin: "Secure Candidate Access Router Discovery", WCNC 2003, 'Online! vol. 4, No. 1, Mar. 16, 2003.
4 European Search Report issued by the European Patent Office in applicant's corresponding European Patent Application No. EP 05003073.3.
5 J. Loughney et al.: "Context Transfer Protocol" Draft-Ietf-Seamoby-CTP-03.TXT, Jun. 2003.
6 Japanese Office Action corresponding to Japanese Patent Application No. 2005-025848, issued on Oct. 30, 2007.
7 Marco Liebsch et al.: "Candidate Access Router Discovery", Draft-Ietf-Seamoby-Card-Protocol-03. TXT, Aug. 2003.
U.S. Classification 370/328, 455/436
International Classification H04W48/16, H04W80/04, H04W36/12, H04W40/34, H04L12/701, H04W99/00, H04W60/00, H04W88/08, H04W84/12, H04L12/28, G06F17/30
Cooperative Classification H04W92/24, H04W40/246, H04L45/44, H04W48/16, H04W36/12
European Classification H04L45/44, H04W40/24D
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