Claims
- 1. A method of real-time communication for an industrial control system having a spatially separated transmitting and receiving node together forming a path connected by at least one communication link, the method comprising the steps of:
- (a) generating a message identifier identifying a message to be transmitted to the receiving node;
- (b) sending an OPEN message from the transmitting node to the receiving node including the message identifier and transmission information related to transmission requirements of the message;
- (c) storing in a table in the receiving node the message identifier and the transmission information as indexed by the message identifier;
- (d) pre-allocating receiver node resources for the processing of the message according to the transmission information by the receiving node:
- (e) sending a data message from the transmitting node to the receiving node, the data message having a data part and the message identifier;
- (f) matching the message identifier of the data message to the message identifier of the table of the receiving node; and
- (g) processing the data message at the receiving node according to the transmission information indexed .by the message identifier
- wherein the receiving node maintains a transmission schedule of messages to be transmitted and wherein the transmission information is the desired transmission scheduling of a retransmission of the data message by the receiving node and wherein the step (d) includes scheduling the data message on the schedule
- wherein the desired transmission scheduling of a retransmission indicates a size of a portion of the message and a periodicity of transmission of the portion in time.
Parent Case Info
This is a continuation of Ser. No. 08/212,533 filed on Mar. 14, 1994 now abandoned.
US Referenced Citations (12)
Continuations (1)
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Number |
Date |
Country |
Parent |
212533 |
Mar 1994 |
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