Resources Contact Us Home
System for simultaneous registration of VoIP network for dual mode mobile telephone stations

Image Number 7 for United States Patent #7522921.

The dual registration system tracks two serving Mobile Switching Centers for each subscriber. The registrations are differentiated as IP Multimedia Subsystem for voice call delivery purposes and CDMA Mobile Switching Center for IP access and other non-voice services. The registration message from the IP Multimedia Subsystem is enhanced via protocol extensions to include an indication that this registration is from the IP Multimedia Subsystem and is to indicate the target Mobile Switching Center for IP Multimedia Subsystem services, such as VoIP. The Home Location Register is enhanced to store two Mobile Switching Centers as the serving Mobile Switching Centers for the dual mode subscriber. The Home Location Register logic is extended to route service to the appropriate Mobile Switching Center depending on service offered, subscriber preferences, and the registration status.

  Recently Added Patents
Methods and apparatuses for configuring and operating graphics processing units
System and method for detecting an earth ground fault of an external power supply connected to a vehicle
PLL circuit
Method and arrangement for controlling semiconductor component
Train car for proppant containers
High power insulated gate bipolar transistors
Methods and systems to reduce a number of simulations in a timing analysis
  Randomly Featured Patents
Self cleaning nozzle arrangement
Method of sampling hardware events in computer system
Process and apparatus for large-scale manufacturing of bulk monocrystalline gallium-containing nitride
Light gas component separation from a carbon dioxide mixture
DTV television transmitter/receiver and method of processing data in DTV transmitter/receiver
Unit for feeding solid drug forms to a conveyor line of a machine for filling capsules
Non-volatile variable resistance memory device and method of fabricating the same
Numerically controlled electromechanical precision drive system
Limited use medical probe
Panel retention mechanism for air handler cabinet