Browse Prior Art Database

Burst Isochronous Envelope Format

IP.com Disclosure Number: IPCOM000081759D
Original Publication Date: 1974-Aug-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Gergaud, C: AUTHOR

Abstract

This is a technique for controlling the terminals used in transmission networks operating in circuit-switching mode or packet-switching mode.

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Burst Isochronous Envelope Format

This is a technique for controlling the terminals used in transmission networks operating in circuit-switching mode or packet-switching mode.

The control is necessary in packet switching so that the network can deliver to and call from a terminal the messages cut into packets.

This control is also necessary when two terminals connected in the circuit- switching mode in a network do not have the same transmission rate, or must stop the data transmission when the receiver is not provided with a buffer of sufficient capacity.

This is performed with a new format of sixteen bits including envelope header 1 of four bits M : signaling or data R : read, W : write, S : synchronization, and the data portion 2 of twelves bits.

The time synchronization is provided by the couple of bits M and S.

The table shown in the figure illustrates the different configurations of envelope header 1 which are used in the transmission procedure.

The burst isochronous envelope format permanently flows between the transmitter and the receiver. In the absence of data transmission, the envelope header 1 contains IL configuration 1001. When the transmitter wants to transmit its data, ID configuration 1000 is transmitted. When the receiver is ready to transmit, WD configuration 1011 is sent back to the transmitter. At this moment the transmitter starts data transmission by replacing the ID by RD configuration 1101.

Supposing the buffer of the receiver is full and...