Patent ID: 8837286
Filing Date: 2014-09-16
Classification: H04L,H04W

Abstract:
1. A communication system comprising: a switch node that operates in accordance with a flow table comprising a plurality of flow entries each of which defines an action field for processing a packet flow corresponding to said flow entry; and a flow control device that comprises a terminal management unit that records, based on a request to set said flow entry from said switch node, information of association between a terminal sending a packet and said switch node to which said terminal is connected, wherein said flow control device acknowledges a movement of said terminal by referring to header information of incoming packet from said switch node, detects that said terminal migrates to another switch node if an association between said migrated terminal and said another switch is not retrieved from said terminal management unit, and instructs said switch node from which said terminal migrates to modify or delete said flow entry corresponding to said migrated terminal.