Patents by Inventor K. Raj Sanmugam

K. Raj Sanmugam 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: 5978669
    Abstract: A method for detecting fraud in a cellular radio telephone system. Fraud is suspected when the system detects a multiple access from a mobile station, when an activity collision occurs, when the system receives a premature registration from the mobile station, when auditing or operator-initiated locating of the mobile station reveals the existence of the mobile station in two locations simultaneously, or when tracing of mobile subscriber activity reveals unusual activity.
    Type: Grant
    Filed: October 28, 1997
    Date of Patent: November 2, 1999
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventor: K. Raj Sanmugam
  • Patent number: 5734977
    Abstract: A method for detecting fraud in a cellular radio telephone system. Fraud is suspected when the system detects a multiple access from a mobile station, when an activity collision occurs, when the system receives a premature registration from the mobile station, when auditing or operator-initiated locating of the mobile station reveals the existence of the mobile station in two locations simultaneously, or when tracing of mobile subscriber activity reveals unusual activity.
    Type: Grant
    Filed: November 10, 1994
    Date of Patent: March 31, 1998
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventor: K. Raj Sanmugam
  • Patent number: 5533094
    Abstract: A method of and system for paging mobile stations within a cellular telecommunication system wherein the allocation of control channel paging capacity is optimized. Each page request for a mobile station received by the system is classified into a predesignated group based upon the characteristics of the request, such as the degree of certainty with which the location of the mobile is known and the origin of the page request. In accordance with the predesignated group to which the page request is assigned, each page request is assigned a paging extent designation to be associated with one or more page attempts and representing the geographic area within the system to which each page attempt is to be broadcast. A paging priority is then assigned to each page attempt based upon the previously assigned group characteristics and paging patterns. Each page attempt is executed within the system according to its designated priority.
    Type: Grant
    Filed: May 12, 1992
    Date of Patent: July 2, 1996
    Assignee: Telefonaktiebolaget L M Ericsson, A Corp. of Sweden
    Inventor: K. Raj Sanmugam