Patents by Inventor Sundar Ranganathan Sriram

Sundar Ranganathan Sriram 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).

  • Enabling packet switched calls to a wireless telephone user
    Patent number: 7403516
    Abstract: A packet switched IP call to a mobile user device in a wireless network is supported where the mobile user does not have a static IP address and where the mobile user is not engaged in communications in which an IP address is currently assigned. The originating party utilizes the directory number of the mobile user to initiate the packet switched call with at least an originating packet being directed to a home agent in the wireless network. The home agent assigns a temporary IP address to the mobile user's UE and translates packets addressed to the user's directory number to the assigned IP address. A switching node forwards the assigned IP addressed packets to the corresponding UE.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: July 22, 2008
    Assignee: Lucent Technologies Inc.
    Inventor: Sundar Ranganathan Sriram
  • Enabling packet switched calls to a wireless telephone user
    Publication number: 20040240441
    Abstract: A packet switched IP call to a mobile user device in a wireless network is supported where the mobile user does not have a static IP address and where the mobile user is not engaged in communications in which an IP address is currently assigned. The originating party utilizes the directory number of the mobile user to initiate the packet switched call with at least an originating packet being directed to a home agent in the wireless network. The home agent assigns a temporary IP address to the mobile user's UE and translates packets addressed to the user's directory number to the assigned IP address. A switching node forwards the assigned IP addressed packets to the corresponding UE.
    Type: Application
    Filed: June 2, 2003
    Publication date: December 2, 2004
    Inventor: Sundar Ranganathan Sriram