Protocol-control information
Encyclopedia
In telecommunication
, the term protocol-control information or PCI has the following meanings:
Telecommunication
Telecommunication is the transmission of information over significant distances to communicate. In earlier times, telecommunications involved the use of visual signals, such as beacons, smoke signals, semaphore telegraphs, signal flags, and optical heliographs, or audio messages via coded...
, the term protocol-control information or PCI has the following meanings:
- The queries and replies among communicationCommunicationCommunication is the activity of conveying meaningful information. Communication requires a sender, a message, and an intended recipient, although the receiver need not be present or aware of the sender's intent to communicate at the time of communication; thus communication can occur across vast...
s equipment to determine the respective capabilities of each end of the communications linkData linkIn telecommunication a data link is the means of connecting one location to another for the purpose of transmitting and receiving information. It can also refer to a set of electronics assemblies, consisting of a transmitter and a receiver and the interconnecting data telecommunication circuit...
. - For layered systems, informationInformationInformation in its most restricted technical sense is a message or collection of messages that consists of an ordered sequence of symbols, or it is the meaning that can be interpreted from such a message or collection of messages. Information can be recorded or transmitted. It can be recorded as...
exchanged between entities of a given layerLayerLayer may refer to:* A layer of archaeological deposits in an excavation* A layer hen, a hen raised to produce eggs* Stratum, a layer of rock or soil with internally consistent characteristics...
, via the service provided by the next lower layer, to coordinate their joint operationBusiness operationsBusiness operations are those ongoing recurring activities involved in the running of a business for the purpose of producing value for the stakeholders...
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