Providing clients access to a server service using an OPC unified architecture (OPC-UA)
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United States of America Patent
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Dec 26, 2017
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N/A
app pub date -
May 31, 2012
filing date -
May 31, 2012
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Abstract
A method for providing clients with access to a service of a server in a network using an OPC-UA, the server service making available varying values of at least one variable to the clients, wherein a client registers for the server service by sending a subscription request for the server service to the server which sets up a subscription structure including a unique subscription ID as well as a TCP/IP multicast group associated with the subscription structure and including a unique multicast address, and there server communicates the multicast address and the subscription ID to every client submitting a subscription request to register for the server service, the server additionally sends each change in value of each variable of the server service to the multicast address over a network via a multicast message so that all clients registered for the server service receive the same multicast message.
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