Method for verifying responses to messages using a barrier message
Patent 5675579 Issued on October 7, 1997. Estimated Expiration Date: 
June 7, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 7, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesNetwork diagnostic apparatus and method Method for handling conversational transactions in a distributed processing environment Method and apparatus for testing a packet-based network Patent #: 5477531 Inventors
AssigneeApplicationNo. 474770 filed on 06/07/1995US Classes:370/248, Path check370/241, DIAGNOSTIC TESTING (OTHER THAN SYNCHRONIZATION)709/237, Computer-to-computer handshaking714/43Bus, I/O channel, or network path component faultExaminersPrimary: Kim, Kenneth S.Attorney, Agent or FirmInternational ClassH04L 001/14AbstractA processing system includes a number of communicatively interconnected system elements structured to send and receive data in the form of message packets. Message packets sent to a destination with expectation of response are timed, and if no response is received within an allotted time, a barrier transaction message packet is sent to the destination. The destination is required to provide a barrier transaction response to the barrier transaction packet only after it has responded to, or discarded, all prior received message packets requiring response by the destination. When the source of the barrier transaction message packet receives the barrier transaction response it can be assured that the communication path to the destination is in order, and no prior (late) responses will be forthcoming. | |
