VoIP enabled femtocell with a USB transceiver station

  • US 7,990,912 B2
  • Filed: 04/02/2007
  • Issued: 08/02/2011
  • Est. Priority Date: 04/02/2007
  • Status: Active Grant
First Claim
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1. A femtocell system for coupling mobile phone signals with voice over internet protocol messaging, having a processor for executing modules, the system comprising:

  • a voice over internet protocol client module for sending registration messages from the femtocell system and for maintaining a network address translation port bindings between a femtocell and a server, for receiving a User Datagram Protocol (UDP) packet containing a plurality of media frames from the server, for recording the media frames in a jitter buffer, for receiving a call request from the server via the network address translation port binding, and for using a UDP port number for transmitting and receiving media;

    a software defined radio module for communicating with the voice over internet protocol client module, for processing and generating digital radio baseband signals, and for measuring received signal strength of digital radio based band signals in a predetermined frequency range;

    a call-control processing module for receiving the call request and for translating the call request into a call-control message transmitted to a mobile phone; and

    an access control database module within the femtocell for storing at least one of an International Mobile Subscriber Identity (IMSI) value and an International Mobile Equipment Identity (IMEI) transmitted by the mobile phone.

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