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The Data Distribution Service (DDS) for real-time systems is an Object Management Group (OMG) machine-to-machine (sometimes called middleware or connectivity framework) standard that aims to enable dependable, high-performance, interoperable, real-time, scalable data exchanges using a publish–subscribe pattern.
Middleware is defined as software that provides a link between separate software applications. It is sometimes referred to as plumbing because it connects two applications and passes data between them. Middleware allows data contained in one database to be accessed through another.
The Data Distribution Service (DDS) middleware does not use a broker in the middle. Instead, each publisher and subscriber in the pub/sub system shares meta-data about each other via IP multicast . The publisher and the subscribers cache this information locally and route messages based on the discovery of each other in the shared cognizance.
Message-oriented middleware is in contrast to streaming-oriented middleware where data is communicated as a sequence of bytes with no explicit message boundaries. Note that streaming protocols are almost always built above protocols using discrete messages such as frames , datagrams , packets , cells , et al.
McIDAS Data Transmission Protocol 113 Yes: No: Ident, authentication service/identification protocol, [11] [65] used by IRC servers to identify users Yes: Assigned: Authentication Service (auth), the predecessor to identification protocol. Used to determine a user's identity of a particular TCP connection. [66] 115: Yes: Assigned: Simple File ...
For example, local autonomy, synchronous, and asynchronous distributed database technologies. The implementation of these technologies can and do depend on the needs of the business and the sensitivity/ confidentiality of the data stored in the database and the price the business is willing to spend on ensuring data security , consistency and ...
OpenADR – Open Automated Demand Response; protocol to manage electricity consuming/controlling devices; Optomux – Serial (RS-422/485) network protocol originally developed by Opto 22 in 1982. The protocol was openly documented [1] and over time used for industrial automation applications. PieP – An Open Fieldbus Protocol
This section is about data exchange between hardware devices. In order for the devices to be able to read and exchange data, they would use a hardware-specific protocol (such as the radio signal) which is generated by a hardware device acting as a sending party (the radio tower), and can be interpreted by another hardware device which is the receiving party (your kitchen radio for instance).
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