| 摘要 |
Provided is a communication system that includes first and second communication devices operating in conformance with IPv6 requirements, in which the first communication device (100) determines whether an own IP address for communication is utilized or not by monitoring a communication status, generates a response request message requesting a response message to the second communication device when the own IP address is determined to be no longer required, designates the own IP address as a destination of the response message in the response request message, and transmits the response request message to the second communication device (200) during a period when a Neighbor Cache entry related to the own IP address in the second communication device is in STALE state after transition from REACHABLE state. |
