Browse Prior Art Database

Note on Interprocess Communication in a Resource Sharing Computer Network (RFC0061) Disclosure Number: IPCOM000003682D
Original Publication Date: 1970-Jul-01
Included in the Prior Art Database: 2019-Feb-11
Document File: 18 page(s) / 25K

Publishing Venue

Internet Society Requests For Comment (RFCs)

Related People

D.C. Walden: AUTHOR

Related Documents

10.17487/RFC0061: DOI

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 8% of the total text.

Network Working Group Dave Walden Request for Comments: 61 Bolt Beranek and Newman July 17, 1970

A Note on Interprocess Communication in a Resource Sharing Computer Network

The attached note is a draft of a study I am still working on. It may be of general interest to network participants.

Walden [Page 1]

RFC 61 Interprocess Communication in a Computer Network July 1970

Interprocess Communication in a Resource Sharing Computer Network


"A resource sharing computer network is defined to be a set of autonomous, independent computer systems, interconnected so as to permit each computer system to utilize all of the resources of each other computer system. That is, a program running in one computer system should be able to call on the resources of the other computer systems much as it would normally call a subroutine." This definition of a network and the desirability of such a network is expounded upon by Roberts and Wessler in [1].

The actual act of resource sharing can be performed in two ways: in a pairwise ad hoc manner between all pairs of computer systems in the network or according to a systematic network wide standard. This paper develops one possible network wide system for resource sharing.

I believe it is natural to think of resources as being associated with processes [2] and therefore view the fundamental problem of resource sharing to be the problem of interprocess communication. I also share with Carr, Crocker, and Cerf [3] the view that interprocess communication over a network is a subcase of general interprocess communication in a multiprogrammed environment.

These views pervade this study and have led to a two part study. First, a model for a time-sharing system having capabilities particularly suitable for enabling interprocess communication is constructed. Next, it is shown that these capabilities can be easily used in a generalized manner which permits interprocess communication between processes distributed over a computer network.

This note contains ideas based on many sources. Particularly influential were -- 1) an early sketch of a Host protocol for the ARPA Network [1][3][4] by W. Crowther of Bolt Beranek and Newman Inc. (BBN) and S. Crocker of UCLA; 2) Ackerman and Plummer’s paper on the MIT PDP-1 time sharing system [5]; and 3) discussion with R. Kahn of BBN about Host protocol, message control, and routing for the ARPA Network. Hopefully, there are also some original ideas in this note. I alone am responsible for the collection of all of these ideas into the system described herein, and I am therefore responsible for any inconsistencies or bugs in this system.

It must be emphasized that this note does not represent an official BBN position on Host protocol for the ARPA Computer Network.

Walden [Page 2]

RFC 61 Interprocess Communication in a Computer Network July 1970


This section describes a model time-sharing system which I think is particularly suitable for performing i...