Patents by Inventor Ramanathan Jagadeesan

Ramanathan Jagadeesan has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7490125
    Abstract: The invention relates to a system and method for coordinating multiple session multimodal interaction. The system and method includes a capability discovery module adapted to discover multimodal capability between at least one client and a multimodal device. The system and method includes an association module adapted to associate multiple independent sessions. The system and method includes a synchronization module adapted to synchronize at least one session with other sessions. And the system and method integrate the at least one client with other devices.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: February 10, 2009
    Assignee: Cisco Technology, Inc.
    Inventors: Ramanathan Jagadeesan, Wai-Yip Tung, Bich Nguyen, Alex Yiu-Man Chan, David Lee
  • Patent number: 7433701
    Abstract: A wireless cellular network includes an access point selector that selects an access point for forwarding data from a wireless device. When data is received with an unacceptable quality level, the access point selector queries other access points for the same data. The queried access points send data quality information to the access point selector. The access point selector uses the data quality information for selecting another one of the access points to forward data from the wireless device.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: October 7, 2008
    Assignee: Cisco Technology, Inc.
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, Kent G. Iverson
  • Publication number: 20080137859
    Abstract: An improved approach to public key passing is provided to inhibit man-in-the-middle (MITM) attacks during an exchange of public keys over one or more public networks. In one embodiment, a method for securely passing public keys includes encrypting a first user public key, wherein the first user public key is associated with a first user device. The method also includes passing the encrypted first user public key to a first gateway server over a secure communication link. The method further includes receiving an encrypted second user public key from the first gateway server over the secure communication link, wherein the second user public key is associated with a second user device, and wherein the second user device is associated with a second gateway server. In addition, the method includes decrypting the second user public key.
    Type: Application
    Filed: December 6, 2006
    Publication date: June 12, 2008
    Inventors: Ramanathan Jagadeesan, Bryan Ogawa, Pamela Suzanne Lee, Mark Enright
  • Publication number: 20080076428
    Abstract: A method for handing off a call between networks includes monitoring a quality of a first link between a mobile station and a wireless local area network (WLAN) when the mobile station is actively connected with the WLAN on a call and monitoring a quality of a second link between the mobile station and a cellular network when the mobile station is actively connected with the WLAN on the call. The method also includes handing off the call from the WLAN to the cellular network when the quality of the first link is less than a handoff trigger threshold for a drop count duration and when the quality of the second link is greater than a minimum cellular link quality threshold.
    Type: Application
    Filed: November 26, 2007
    Publication date: March 27, 2008
    Applicant: Cisco Technology, Inc.
    Inventors: Ramanathan Jagadeesan, Bich Nguyen
  • Patent number: 7289810
    Abstract: The present invention provides methods and devices using location detection to enable MMMDs to activate and tune to appropriate radios and networks. Some preferred embodiments use radio frequency identification (“RFID”)—based location detection. Preferably, the location detection occurs at or near wireless domain boundaries. Some implementations employ proximity/boundary detection to enhance handoff triggers, which initiate handoff mechanisms between different networks, as an MMMD moves between wireless networks, via a wireless domain portal. Some implementations involve methods and devices for device validation and authorization. An MMMD is provided with local wireless network awareness, which may be used by the MMMD to have the appropriate radio turned on and properly tuned. Accordingly, the methods and devices of the present invention achieve power savings and improved handoff across networks.
    Type: Grant
    Filed: December 10, 2004
    Date of Patent: October 30, 2007
    Assignee: Cisco Technology, Inc.
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, Andrew Chung, Arthur G. Howarth
  • Publication number: 20070242672
    Abstract: Systems and methods are provided to facilitate efficient routing of unlicensed mobile access (UMA) communications. In one implementation, a method of providing a communication link between a first mobile station and a second mobile station through a customer premises equipment (CPE) device includes intercepting a call setup request provided by the first mobile station and received at a security gateway of the CPE device. An address associated with the second mobile station may be extracted from the call setup request and the address may be compared with a plurality of records maintained by the CPE device. A call setup request may be forwarded to the second mobile station if the address corresponds to at least one of the records. The first and second mobile stations may be in communication with the CPE device over a wireless local access network (WLAN) in accordance with an unlicensed mobile communication standard.
    Type: Application
    Filed: April 18, 2006
    Publication date: October 18, 2007
    Inventors: Mark Grayson, Bich Nguyen, Ramanathan Jagadeesan
  • Publication number: 20070232322
    Abstract: Gathering location information from a first wireless network to determine whether to anchor a communication session in a second wireless network, a mobile node capable of communicating with both the first wireless network and the second wireless network, includes receiving location information from the first wireless network as the mobile node moves through one or more service areas of the first wireless network. It is determined whether a triggering event occurs. If the triggering event occurs, the location information is stored to determine whether to anchor a session in the second wireless network.
    Type: Application
    Filed: March 28, 2006
    Publication date: October 4, 2007
    Inventors: Ramanathan Jagadeesan, Andrew Chung, Steven Donovan, Mark Grayson, Bich Nguyen, Christopher Pearce
  • Publication number: 20070195776
    Abstract: A method for channeling network traffic is described, which includes identifying, with an agent disposed within a client computer of the network, a portion of the network traffic associated with the client computer that has compliance related interest. The identified compliance interesting traffic portion is encapsulated with a header. Apart from the encapsulated traffic portion, the network traffic is routed according to its designated destination. The interesting traffic portion however is diverted on the basis of the encapsulating header. The diverted traffic portion is channeled for compliance related processing. Upon being channeled, the traffic portion is processed according to a compliance related policy. The processing is performed remotely from the client computer.
    Type: Application
    Filed: February 23, 2006
    Publication date: August 23, 2007
    Inventors: Danyang Zheng, Ramanathan Jagadeesan, Bich Nguyen, Jack Cham
  • Publication number: 20070183364
    Abstract: Anchoring a communication session for a target mobile phone includes identifying a current access node operable to provide the target mobile phone access to a first network of a first network type. Potential access nodes operable to provide a mobile phone access to a second network of a second network type are identified. Whether the communication session can be handed off to a potential access node of the one or more potential access nodes is established. Anchoring of the communication session is initiated in the second network only if the communication session can be handed off to a potential access node of the one or more potential access nodes.
    Type: Application
    Filed: February 3, 2006
    Publication date: August 9, 2007
    Inventors: Steven Donovan, Bich Nguyen, Mark Grayson, Christopher Pearce, Ramanathan Jagadeesan, Andrew Chung
  • Publication number: 20070130077
    Abstract: A content monitoring system applies policies to data transfers, and adapts the policies based on violations. Each policy includes a rule that detects violations and actions performed when the rule is violated. Policies may be adapted by, for example: enabling an inactive policy; modifying a parameter within a rule or an action; generating a new policy by combining a policy macro with the violating content block or with associated meta-data, for example, a user ID or IP address. An optional rolling buffer can be used to hold the most recent transfers, and newly adapted policies can be reapplied to the buffered content. Some content blocks are reassembled from a stream of terminal control protocol (TCP) packets that are transferred across a network barrier point. Other content blocks come from writes to removable media. Some content must be decoded, for example, a word processor file.
    Type: Application
    Filed: November 22, 2005
    Publication date: June 7, 2007
    Applicant: Cisco Technology, Inc.
    Inventors: Ramanathan Jagadeesan, Bich Nguyen
  • Publication number: 20070123238
    Abstract: A method for providing signaling in a network environment is provided that includes receiving, at a mobile station, a new call from a mobility application, the new call including a caller ID segment associated with an existing call for the mobile station. The method further includes evaluating data included in the caller ID segment in order to perform an activity related to the data provided in the caller ID segment.
    Type: Application
    Filed: November 29, 2005
    Publication date: May 31, 2007
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, Andrew Chung, Christopher Pearce
  • Publication number: 20060256751
    Abstract: An apparatus for providing connectivity is provided that includes a mobility server operable to coordinate a communication session between a first and a second end-user device. The first end-user device is associated with a first call leg and the second end-user device is associated with a second call leg. A handoff is executed in transferring the communication session from the first end-user device to the second end-user device. In more particular embodiments, the mobility server is operable to receive signal strength information from the first end-user device and to execute the handoff based on the signal strength information. In addition, the handoff is executed based on an end-user preference that is provided in a subscription that is accessed by the mobility server.
    Type: Application
    Filed: May 11, 2005
    Publication date: November 16, 2006
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, Mark Grayson, Eric Hamel
  • Publication number: 20060251113
    Abstract: A method is provided that includes receiving a request from a communication device to establish a communication session with a mobile station, the mobile station being operable to roam between a private and a public network. The mobile station is signaled via a cellular data network that a call is being initiated for the mobile station. Signaling information may be exchanged with a voice gateway such that one or more voice circuits are established. A signaling pathway may be established between an Internet protocol private branch exchange (IP PBX) and the mobile station via the cellular data network. The establishment of the signaling pathway is substantially concurrent with the establishment of one or more of the voice circuits. One or more features associated with a private network are delivered to the mobile station during the communication session as an end user moves between the public and private networks.
    Type: Application
    Filed: June 16, 2006
    Publication date: November 9, 2006
    Applicant: Cisco Technology, Inc.
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, Kamaldip Toor, Sudhakar Valluru, Christopher Pearce
  • Publication number: 20060205407
    Abstract: A method for handing off a call between networks includes monitoring a quality of a first link between a mobile station and a wireless local area network (WLAN) when the mobile station is actively connected with the WLAN on a call and monitoring a quality of a second link between the mobile station and a cellular network when the mobile station is actively connected with the WLAN on the call. The method also includes handing off the call from the WLAN to the cellular network when the quality of the first link is less than a handoff trigger threshold for a drop count duration and when the quality of the second link is greater than a minimum cellular link quality threshold.
    Type: Application
    Filed: May 30, 2006
    Publication date: September 14, 2006
    Applicant: Cisco Technology, Inc.
    Inventors: Ramanathan Jagadeesan, Bich Nguyen
  • Publication number: 20060205392
    Abstract: A method for providing feature support is provided that includes receiving, by a mobile station, multiple cell calls and coordinating media associated with the cell calls in order to make a feature of the mobile station functional for an end user of the mobile station. The feature is invoked after the mobile station has roamed from an enterprise network to a cellular network and experienced a handoff.
    Type: Application
    Filed: March 8, 2005
    Publication date: September 14, 2006
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, David Daiker, James Williams
  • Publication number: 20060183478
    Abstract: A method for handling media in a make-before-break handoff between wireless networks is provided that includes communicating with a mobile station to facilitate a session handoff between two call legs of a session. The method also includes identifying a relevant frame of one of the legs, performing a cross correlation operation, generating a delay difference estimate between the two legs, and performing a level difference estimation for the two legs.
    Type: Application
    Filed: February 11, 2005
    Publication date: August 17, 2006
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, Andrew Chung, Michael Ramalho
  • Publication number: 20060178147
    Abstract: According to a particular embodiment, a method for assisting in a handoff is provided that includes receiving signaling from one or more access points, which may transmit information to a mobile station. The information may be used to execute a handoff from an enterprise network to a cellular network or from the cellular network to the enterprise network.
    Type: Application
    Filed: February 4, 2005
    Publication date: August 10, 2006
    Inventors: Ramanathan Jagadeesan, Chol Kang, Bich Nguyen, David Stephenson, Richard Rebo
  • Patent number: 7072291
    Abstract: Devices, softwares and methods are provided for redundantly encoding a data stream into frames for network transmission as packets. A main encoder encodes a data stream into main frames, while a redundant encoder encodes it into redundant frames. The redundant frames have a redundant-coding delay from the main frames that is adjustable to accommodate many different sets of network conditions.
    Type: Grant
    Filed: August 23, 2001
    Date of Patent: July 4, 2006
    Assignee: Cisco Technology, Inc.
    Inventors: Ramanathan Jagadeesan, Bich Nguyen
  • Publication number: 20060128384
    Abstract: The present invention provides methods and devices using location detection to enable MMMDs to activate and tune to appropriate radios and networks. Some preferred embodiments use radio frequency identification (“RFID”)—based location detection. Preferably, the location detection occurs at or near wireless domain boundaries. Some implementations employ proximity/boundary detection to enhance handoff triggers, which initiate handoff mechanisms between different networks, as an MMMD moves between wireless networks, via a wireless domain portal. Some implementations involve methods and devices for device validation and authorization. An MMMD is provided with local wireless network awareness, which may be used by the MMMD to have the appropriate radio turned on and properly tuned. Accordingly, the methods and devices of the present invention achieve power savings and improved handoff across networks.
    Type: Application
    Filed: December 10, 2004
    Publication date: June 15, 2006
    Applicant: Cisco Technology, Inc., A corporation of california
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, Andrew Chung, Arthur Howarth
  • Publication number: 20060121902
    Abstract: A method for facilitating communications between wireless networks is provided that includes communicating with a mobile station and transferring a communication session from a first wireless link to a second wireless link. The mobile station is operable to negotiate a first wireless link with a first wireless network, to establish a communication session with a device using the first wireless link, and to facilitate a session handoff with a second wireless link with the second wireless network using the second wireless interface. The handoff is enabled by associating the first wireless link to the second wireless link.
    Type: Application
    Filed: December 3, 2004
    Publication date: June 8, 2006
    Inventors: Ramanathan Jagadeesan, Bich Nguyen, Andrew Chung, Christopher Pearce