Time dependent Refers to processes where data must be delivered within certain time constraints Multimedia streams require an isochronous transport mechanism to ensure that data is delivered as fast as it is displayed, and to ensure that the audio is synchronized with the video
Signals that depend on uniform timing or carry their own timing information embedded as part of the signal ATM
Data transmission with individual characters separated by a whole number o fbit-length intervals
In electronic systems - when all devices in the network derive their timing signal directly or indirectly from the same primary reference clock
timing that is derived from the signal carrying the data (i e , no timing or clock lead is provided at the interface)
Signals that are dependent on some uniform timing or carry their own timing information embedded as part of the signal
Signals which are dependent on some uniform timing or carry their own timing information imbedded as part of the signal Voice and video signals are isochronous signals, but data transfer is generally not
1 Of a periodic signal, pertaining to transmission in which the time interval separating any two corresponding transitions is equal to the unit interval or to a multiple of the unit interval (188) 2 Pertaining to data transmission in which corresponding significant instants of two or more sequential signals have a constant phase relationship Note: "Isochronous" and "anisochronous" are characteristics, while "synchronous" and "asynchronous" are relationships
Refers to a communication protocol based on time slices rather than handshaking For example, a process might have 20 percent of total bus bandwidth During its time slice, the process can stream data IEEE 1394 can be isochronous; 802 11b cannot -- not yet, anyway