System and method for network connection detection

Details System and method for network connection detection System and method for network connection detection

2003-07-31

2009-12-01

Moe, Aung S (Department: 2416)

Multiplex communications

Diagnostic testing

C370S244000, C370S245000, C370S248000, C370S252000, C370S236000, C370S346000, C370S449000, C370S439000, C709S245000, C709S227000, C709S237000

Reexamination Certificate

active

07626937

ABSTRACT:
The present invention provides a system and method that operates in the link layer and detects connection status in a LAN. The system includes a request frame whose source address is an address of a node transmitting the request frame, a reply frame whose destination address is the source address of the request frame, and a first node and a second node within the LAN for processing the request/reply frame. The method includes the first node transmitting a request frame into the LAN, the second node transmitting a reply frame to the first node if receiving the request frame, and the first node checking whether a destination address of the reply frame comprises an address of the first node when receiving the reply frame. If so, the connection between the first and second nodes is in a normal state.

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