Patents by Inventor Stefan Engström

Stefan Engström 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).

  • Publication number: 20100003993
    Abstract: A method for calculating path loss PL at a point P in a coverage area CA of an antenna at a cell site. The method comprises the steps: transmitting a signal from the antenna, the antenna having an effective antenna gain Gant, and measuring a received signal strength indicator RSSI of the transmitted signal by a receiving antenna at the point P. The method further comprises the steps: determining a dominant indirect radiation path between the antenna and the receiving antenna to establish the effective antenna gain Gant from the antenna in a direction of the dominant indirect radiation path, and calculating path loss PL at the point P using the established effective antenna gain Gant and measured received signal strength indicator RSSI. A method for mapping a coverage area, a method for simulating changes in a communication network and a system for cell planning.
    Type: Application
    Filed: September 6, 2006
    Publication date: January 7, 2010
    Inventor: Stefan Engström
  • Publication number: 20090016274
    Abstract: A Generic Access Network Controller (GANC) for providing both location and charging information from a Generic Access Network (GAN) to a core network. During registration of a mobile station (MS) the GANC determines a Charging Cell Global Identity (Charging-CGI) and a Location Cell Global Identity, (Location-CGI) for the MS and stores the CGIs in an MS context. The MS sends to the GANC, a request a to establish a signaling connection, and includes an Establishment Cause IE indicating a reason for the connection. The GANC selects from the MS context, either the Charging-CGI or the Location-CGI based upon the Establishment Cause IE, and sends the selected CGI to the core network in a message triggering a signaling connection.
    Type: Application
    Filed: February 24, 2006
    Publication date: January 15, 2009
    Inventors: Tomas Nylander, Jari Vikberg, Stefan Engstrom, Tomas Bornefall, Henrik Adsersen
  • Publication number: 20080194265
    Abstract: The present invention relates to a method and arrangements for providing an estimation of a cell radius in a mobile telecommunications network. The arrangement comprises means for estimating the path loss by using an arbitrarily path loss estimation method wherein a at least a pre-defined cell radius is used as input. The use of the arbitrarily path loss estimation method results in a path loss data file comprising values associated with the signal strength for pixels within the cell defined by the first cell radius. The arrangement is characterized in that it further comprises means for estimating a first updated cell radius by excluding pixels having a signal strength below a predetermined threshold from the cell area having the pre-defined cell radius, wherein the first updated cell radius is the cell radius of the remaining cell area when said pixels are excluded.
    Type: Application
    Filed: May 25, 2005
    Publication date: August 14, 2008
    Inventor: Stefan Engstrom