Browse Prior Art Database

Transport of Electronic Messages Through a Network

IP.com Disclosure Number: IPCOM000128887D
Original Publication Date: 1979-Dec-31
Included in the Prior Art Database: 2005-Sep-20
Document File: 10 page(s) / 36K

Publishing Venue

Software Patent Institute

Related People

Roy Levin: AUTHOR [+4]

Abstract

We list design objectives for a, distributed mechanism to transport digital memoranda in a network, and discuss the associated administrative functions. We examine registering, authenticating, locating, and grouping users; define name mappings associated with message delivery.; and consider the distribution of services among the computing elements in a network. Based on these analyses, we outline the structure for a distributed transport mechanism. n A CR Categories: 3.57, 3.81, 4.9 Key words and phrases: electronic mail, computer networks, protocols, message systems XEROX PALO ALTO RESEARCH CENTER 3333 Coyote Hill Road / Palo Alto / California 94304

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 10% of the total text.

Page 1 of 10

THIS DOCUMENT IS AN APPROXIMATE REPRESENTATION OF THE ORIGINAL.

Transport of Electronic Messages Through a Network

by Roy Levin and Michael D. Schroeder

CSL-79-4 APRIL 1979

Abstract:

We list design objectives for a, distributed mechanism to transport digital memoranda in a network, and discuss the associated administrative functions. We examine registering, authenticating, locating, and grouping users; define name mappings associated with message delivery.; and consider the distribution of services among the computing elements in a network. Based on these analyses, we outline the structure for a distributed transport mechanism. n

A CR Categories: 3.57, 3.81, 4.9

Key words and phrases: electronic mail, computer networks, protocols, message systems

XEROX PALO ALTO RESEARCH CENTER 3333 Coyote Hill Road / Palo Alto / California 94304

1. Introduction

Afessage systems that communicate memoranda among members of a community are an important application Of Computers and networks. Such message systems generally rely on a central facility used by all members of the community, such as a time sharing system, to transport messages from one user to another. While a centralized approach simplifies the design of the message transport mechanism, it cornplicates use, growth, and administration when the community is large, dispersed, and includes people from multiple organizations. A distributed transport mechanism is more complex to design, but permits more natural use, simple growth, and flexible administration.

One approach to distribution is exemplified by the Arpanet message system protocols [ArpaNetj that allow multiple local message systems to be interconnected and messages to be forwarded from one site to another. Unfortunately, recipient names contain explicit routing and resource information that may change when additional computers are added within a local community. Also, the potential reliability of a distributed system is not realized, for when a user's local message system computer fails that user is cut off from message service. In this paper we sketch the design for a distributed message transport mechanism that decouples naming from routing and resource management, and that continues to provide all users with message service when individual computers fail.

1.1 Environment

Xerox Page 1 Dec 31, 1979

Page 2 of 10

Transport of Electronic Messages Through a Network

Figure 1 illustrates the network environment in which we consider transport of messages. This environment exists within the Xerox research and development community in the United States. Most computing is done in personal computers, labeled PC in the figure, that each have a small removable disk for local storage of files. These computers may be used by various persons at different times for different tasks. 'Me personal computers are interconnected by a network that consists of Ethernet packet broadcast local networks [Metcalfe and Boggs], gateways, and telephone lines. Als...