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Method for dialing an internet protocol phone

  • US 20040028030A1
  • Filed: 08/12/2002
  • Published: 02/12/2004
  • Est. Priority Date: 08/12/2002
  • Status: Abandoned Application
First Claim
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1. A method for dialing an Internet protocol phone (IP phone/I-phone), suitable for allowing a calling side unit to dial the Internet protocol phone to a receiving side unit via a general packet radio service (GPRS) network, wherein the calling side unit and the receiving side unit are involved in the same one of a global system for mobile communication (GSM), the method comprising:

  • the calling side unit entering the GPRS network, and obtaining an Internet protocol (IP) address of the calling side unit;

    the calling side unit using the GSM to issue a request signal for communication to the receiving side unit, wherein the request signal for communication comprises the IP address of the calling side unit and a communication port of the calling side unit;

    the receiving side unit receiving the request signal for communication, and entering the GPRS network, and obtaining an IP address of the receiving side unit;

    the receiving side unit converting a voice signal of a user of the receiving side unit into a first voice digital data stream, wherein the first voice digital data stream is also compressed and packed into at least one response packet by a user datagram protocol (UDP), wherein the at least one response packet by the UDP includes the IP address of the receiving side unit;

    the receiving side unit transmitting the response packet by the UDP to the calling side unit via the GPRS network, according to the IP address of the calling side unit and the communication port of the calling side unit;

    the calling side unit receiving the response packet by the UDP from the communication port of the calling side unit, and unpacking and decompressing the response packet by the UDP into a second voice digital data stream, wherein the second voice digital data stream is decoded into the user'"'"'s voice signal that is further provided to the calling side unit; and

    the calling side unit starting to transmit and receive the packet by the UDP, which carries the voice digital data, to and from the receiving side unit by each other via the IP address of the receiving side unit included in the response packet by the UDP, so as to perform a dialogue via the Internet protocol phone.

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