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Preemptive Information Insertion Mechanism Disclosure Number: IPCOM000060815D
Original Publication Date: 1986-May-01
Included in the Prior Art Database: 2005-Mar-09

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Lebizay, G Mills, DR Port, E Schick, T [+details]


This article describes a technique that permits synchronous data (e.g., voice, video, etc.) and asynchronous data to cohabit a common communication channel or line. Essentially, the transmission of a packet of asynchronous data is interrupted and synchronous data is nested in the packet of asynchronous data. The preemptive insertion of a synchronous data packet for every voice or video conversation on a line during every time period, such as every millisecond, could prove to be a significant performance drain on the line and thus the network. A more effective approach is that a single packet should contain information for several voice conversations. Each voice packet contains n slots, each of which contains either no bytes or a predetermined number of bytes (such as 1 or 2 bytes).