Patent ID: 7272143

Claim:
A communication method of performing communications between a plurality of terminals connected to each other through at least one switch, comprising: setting, in advance of a process migration, a connection for connecting two or more of the plurality of terminals bi-directionally by means of the at least one switch, the two or more of the plurality of terminals being determined to have a possibility of becoming an object of the process migration; copying a message output from one of the terminals and transferring copied messages to the terminals determined to become the object of the process migration; and moving a process executed on one of the two or more of the plurality of terminals to another of the two or more of the plurality of terminals, the process using the connection both before and after the migration, wherein the connection setting includes assigning a connection identifier for each of the two or more of the plurality of terminals, so that each of the two or more of the plurality of terminals identifies the connection based on the same value of connection identifier on transmitting a message onto the connection.