Patents by Inventor Serafim Petsis

Serafim Petsis 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).

  • Method of locating NAS context
    Patent number: 8483163
    Abstract: A method of locating NAS context relating to a network access server session in a communication network is provided, the method comprising receiving an Accounting Stop Request for a PDP context associated to a network access server session, comparing an Accounting Session ID implemented in the Accounting Stop Request with Accounting Session IDs associated with active network access server sessions, in case that no matching Accounting Session ID is found, determining whether a value of an identification parameter implemented in the received Accounting Stop Request matches a value of a corresponding identification parameter associated with an active network access server session, and locating a NAS context based on the result of matching identification parameters.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: July 9, 2013
    Assignee: Nokia Siemens Networks Oy
    Inventors: Vesa Pauli Hellgren, Serafim Petsis
  • Method of deciding to release communication resources
    Patent number: 8284724
    Abstract: A method of deciding to release communication resources used for a network access server session in a communication network is provided, wherein the method involves receiving an Accounting Stop Request for a PDP context associated to the network access server session, deciding whether a Session Stop Indicator is included in the Accounting Stop Request, in case no Session Stop Indicator is included deciding whether further PDP contexts are associated with the network access server session, in case no further PDP context is associated with the network access server session, starting an IDLE Timer to determine a point in time for releasing the communication resources.
    Type: Grant
    Filed: June 1, 2009
    Date of Patent: October 9, 2012
    Assignee: Nokia Siemens Networks Oy
    Inventors: Vesa Pauli Hellgren, Serafim Petsis
  • METHOD OF LOCATING NAS CONTEXT
    Publication number: 20110167161
    Abstract: A method of locating NAS context relating to a network access server session in a communication network is provided, the method comprising receiving an Accounting Stop Request for a PDP context associated to a network access server session, comparing an Accounting Session ID implemented in the Accounting Stop Request with Accounting Session IDs associated with active network access server sessions, in case that no matching Accounting Session ID is found, determining whether a value of an identification parameter implemented in the received Accounting Stop Request matches a value of a corresponding identification parameter associated with an active network access server session, and locating a NAS context based on the result of matching identification parameters.
    Type: Application
    Filed: May 19, 2009
    Publication date: July 7, 2011
    Applicant: Nokia Siemens Networks Oy
    Inventors: Vesa Pauli Hellgren, Serafim Petsis
  • Method of deciding to release communication resources
    Publication number: 20090310551
    Abstract: A method of deciding to release communication resources used for a network access server session in a communication network is provided, wherein the method involves receiving an Accounting Stop Request for a PDP context associated to the network access server session, deciding whether a Session Stop Indicator is included in the Accounting Stop Request, in case no Session Stop Indicator is included deciding whether further PDP contexts are associated with the network access server session, in case no further PDP context is associated with the network access server session, starting an IDLE Timer to determine a point in time for releasing the communication resources.
    Type: Application
    Filed: June 1, 2009
    Publication date: December 17, 2009
    Applicant: Nokia Siemens Networks Oy
    Inventors: Vesa Pauli HELLGREN, Serafim Petsis