Browse Prior Art Database

Variable Multiplexing To and From Participating Systems

IP.com Disclosure Number: IPCOM000074264D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Fredericksen, DH: AUTHOR [+3]

Abstract

This description relates to an arrangement which permits a computer system to specify dynamically the degree of either incoming or outgoing multiplexing that can go on between itself and the other systems. It is particularly efficaciously employed in an integrated computer network which comprises a plurality of user computer systems, i.e., user nodes and a grid computer system or grid node through which the user nodes communicate with each other.

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Variable Multiplexing To and From Participating Systems

This description relates to an arrangement which permits a computer system to specify dynamically the degree of either incoming or outgoing multiplexing that can go on between itself and the other systems. It is particularly efficaciously employed in an integrated computer network which comprises a plurality of user computer systems, i.e., user nodes and a grid computer system or grid node through which the user nodes communicate with each other.

In accordance with the arrangement, a user node may be in one of several states.
1) Ready to receive and transmit.
2) Temporarily unable to receive logical messages, but able to

receive control characters, control messages and originate

logical messages.
3) Unable to receive or transmit; i.e., the user node is

logically or physically not connected to the network.
4) Unable to receive new network jobs but able to handle

traffic for network jobs in progress.
5) Unable to receive blocks for specific logical messages but

able to receive all other traffic.

To convey this information to the grid node, a series of messages are provided which convey the above information thereto. These messages, for example, have the following content.
1) Stop transmission of all messages.
2) Resume transmission of messages.
3) Shut down (grid node or user node going off the network).
4) Request transmission of block numbers.
5) Selective transmission halt. Do not transmit a particular

logi...