Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method for time stamp-based replay protection and PDSN synchronization at a PCF










Image Number 2 for United States Patent #7116668.

A packet control function (PCF) exchanging messages with a packet data serving node (PDSN) in a wireless communication network guards against malicious or erroneous message replay by checking the "reasonableness" of PDSN time stamps in registration messages it receives over its PDSN interface. Received messages that are too old are rejected by the PCF, even if otherwise valid. A configurable time threshold may be set at the PCF that determines the allowable maximum age of a received message. Further, because messages received from the PDSN contain echoed identifier values generated by the PCF, the PCF may implement identifier value function generation that insures no repeated identifier values over a desired interval. The desired interval is set larger than the allowable message age to further guard against attempted message replay.








 
 
  Recently Added Patents
Water bottle warning triangle
Circuit board and display panel assembly having the same
Reference circuit with curvature correction using additional complementary to temperature component
System and method for efficient association of a power outlet and device
Method for forming contact hole
Apparatus and method for recording reboot reason of equipment
Method and system for using personal devices for authentication and service access at service outlets
  Randomly Featured Patents
Memory control device
Container with lid
Stamped and formed electrical tab
Method and apparatus for managing vending machine offers
Means for counterbalancing mass in mechanisms such as a robot arm
Showerhead
System for improving the dynamic range of transmitter power measurement in a cellular telephone
Mechanical air reel
Copolymerizable, ultraviolet light absorber 2-(2H-benzotriazol-2-yl)-4-alkylphenol acrylic acid esters
Fuel vapor recovery system control valve