Peer-to-peer mobile instant messaging method and device

  • US 7,764,637 B2
  • Filed: 09/07/2004
  • Issued: 07/27/2010
  • Est. Priority Date: 04/05/2004
  • Status: Active Grant
First Claim
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1. A method of establishing session-based instant messaging communications between an initiating mobile device and a target mobile device that each supports a data packet-based communications service over a digital mobile network system, the method comprising:

  • receiving a selected phone number from a user of the initiating mobile device corresponding to the target mobile device;

    generating a port number for the received selected phone number;

    opening a listening TCP end-point bound to the generated port number on the initiating mobile device to receive a TCP connection request from the target mobile device;

    embedding an invitation message comprising an IP address of the initiating mobile device and the generated port number in a telephony ringing signal transmitted to the target mobile device using the selected phone number;

    receiving a TCP connection request from the target mobile device at the listening TCP end-point on the initiating mobile device through the data packet-based communications service; and

    establishing a TCP connection through the data packet-based communications service for the session-based instant messaging session enabling transmission of a byte stream between the initiating mobile device and the target mobile device, wherein the TCP connection is established without use of a server that handles connection requests from multiple mobile devices.

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