A system for a message processing system in which messages are transmitted from source nodes to destination nodes. A transmission flow control technique is disclosed in which the source node optimistically sends control information and a data portion of a message, and wherein a destination node discards the data portion of the message if it is unable to accommodate it. The destination node, however, retains enough of the control information to identify the message to the source node, and when the destination node is subsequently able to accommodate the data portion, the destination node issues a request to the source node to retransmit the data portion of the message. Discarding of one message is followed by discards of sequential messages, until the destination node is able to accommodate the data portions of messages. The flow control technique disclosed herein is used, for example, in an environment where buffers are posted to accommodate messages at the destination node, and is particularly suited for conditions arising in multi-tasking systems where the destination node is generally assumed to be prepared to accommodate data, however, if not prepared, is likely not prepared for long periods of time.

Claims

19 · 2 independent · depth 7

19 granted claims

›1.independentA flow control system for transmitting a plurality of messages from a source node to a destination node in a message processing system, the plurality …+9

›2.↳ 1The system of claim 1, further comprising: means for, in response to the destination node being unable to retain the data portion of the first message…d2+4

›3.↳ 2The system of claim 2, wherein said means for destination node initiating a retransmission (110) of the data portion of the first message includes: me…d3+3

›7.↳ 1The system of claim 1, wherein the plurality of messages includes a second message, sequential to the first message, and comprising a data portion, th…d2+2

›10.↳ 1The system of claim 1, wherein the destination node is unable to retain the data portion of the first message due to buffer unavailability, and wherei…d2

›11.independentA flow control system for transmitting a plurality of sequential messages from a source node to a destination node in a message processing system, eac…+8

›12.↳ 11The system of claim 11, further comprising: means for, as the destination node becomes able to retain the respective data portions of the first messag…d2+5

›13.↳ 12The system of claim 12, further comprising: means for, in response to said respective pull requests from the destination node, the source node retrans…d3+4

›18.↳ 11The system of claim 11, further comprising: means for, in response to the destination node being able to retain the data portion of the first message:…d2+1

Classifications

4 codes

USPC · US Patent Classification

709/235709/232370/231709/237

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764 days filing → grant

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Viet D. Vu

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