Resources Contact Us Home
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
Drugs for prophylaxis or mitigation of taxane-induced neurotoxicity
Touch screen panel
Wireless network device including a polarization and spatial diversity antenna system
Package for product
Azole derivatives, methods for producing the same, intermediate thereof, agro-horticultural agents
High pressure refolding of protein aggregates and inclusion bodies
Low temperature pressure chamber unit, magnetic resonance device with a low temperature pressure chamber unit, and an attachment method to attach at least one add-on unit to an external housin
  Randomly Featured Patents
Rotary head drum having head-affixing, transformer-affixing, and bearing-engaging surfaces lying in the same plane
Apparatus and method for floating-point exception prediction and recovery
Multi disc flying toy featuring lift producing fins
System and method for controlling signal strength over a reverse link of a CDMA wireless communication system
Upholstered seat systems for leisure chairs
Packaged heat dissipating assembly for an intermediate bus converter
Tire tread
Power package for spa apparatus
Sulfited fats
Triazole compounds and their use as transglutaminase inhibitors