A Mechanically Proved and an Incremental Development of the Session Initiation Protocol INVITE Transaction

<table class="algorithm-group"><tr><td><table class="algorithm" id="figbox4"><tr><td colspan="2"><b>CONSTANTS</b></td></tr><tr><td colspan="2">  Ready</td></tr><tr><td colspan="2">  Calling</td></tr><tr><td colspan="2">  Proceeding</td></tr><tr><td colspan="2">  Accepted</td></tr><tr><td colspan="2">  Completed</td></tr><tr><td colspan="2">  Confirmed</td></tr><tr><td colspan="2">  Terminated</td></tr><tr><td colspan="2">  INVITE</td></tr><tr><td colspan="2">  ACK</td></tr><tr><td colspan="2">  r2xx</td></tr><tr><td colspan="2">  r3xx_r699</td></tr><tr><td colspan="2">  r1xx</td></tr></table></td></tr></table>

Journal of Computer Networks and Communications

figbox4

Box 4

Box 4: A Mechanically Proved and an Incremental Development of the Session Initiation Protocol INVITE Transaction 