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
Scanning optical positioning system with spatially triangulating receivers
Fail-safe upgrading of portable electronic device software
LCD television set capable of external connection with application processor
Method and system for modeling a common-language speech recognition, by a computer, under the influence of a plurality of dialects
Enzymatic demethylation of flavonoids
Process for the preparation of protected L-alanine derivatives
Field of view matching in a visual prosthesis
  Randomly Featured Patents
Switchable tappet for the direct transmission of a cam lift to a tappet push rod
Safety harness
Apparatus for adjusting the print head gap in a dot matrix printer
User interface
Cellular phone
Method for closing a waste bin filling hole and a waste bin
Method and system for enhancing efficiency by modulating power amplifier gain
Composition to enhance cut flowers
Rheometer for measuring high pressure and high temperature with sampling
Initialization system for recovering bits and group of bits from a communications channel