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Method and apparatus for transmitting groupcast to support voice paging service in voice over internet protocol system

  • US 9,998,506 B2
  • Filed: 01/05/2010
  • Issued: 06/12/2018
  • Est. Priority Date: 01/05/2009
  • Status: Active Grant
First Claim
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1. A method for an electronic device to operate in a voice over internet protocol (VoIP) system, the method comprising:

  • configuring a group table for a service group based on a plurality of setup messages for a plurality of terminals comprising a transmitting terminal and a plurality of receiving terminals, each of the plurality of setup messages comprising an internet protocol (IP) address and port, a real-time transport protocol (RTP) port, and a quality of service (QoS) for each of the plurality of terminals;

    receiving a voice paging message from the transmitting terminal;

    determining, upon determining that a source IP address and port of the received voice paging message are identical to an IP address and port of the transmitting terminal included in the group table, whether an IP address and port of each of the plurality of receiving terminals are included in the group table;

    generating, upon determining that the IP address and port of each of the plurality of receiving terminals are included in the group table, a plurality of voice paging messages for the plurality of receiving terminals by copying the received voice paging message, wherein the number of the plurality of voice paging messages is equal to a number of the plurality of receiving terminals;

    changing a destination IP address and port of each of the plurality of generated voice paging messages into the IP address and port of each of the plurality of receiving terminals included in the group table; and

    unicasting each of the plurality of voice paging messages to each of the plurality of the receiving terminals, respectively, according to the changed destination IP address and port,wherein the transmitting terminal and the plurality of receiving terminals are registered, in the group table, as the service group, andwherein a QoS for each of the plurality of receiving terminals is set to each of the plurality of voice paging messages, respectively.

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