Skip to main content Accessibility help
×
Hostname: page-component-78c5997874-dh8gc Total loading time: 0 Render date: 2024-11-10T06:55:34.986Z Has data issue: false hasContentIssue false

4 - Connection-management Protocols

Published online by Cambridge University Press:  22 March 2010

Anneke A. Schoone
Affiliation:
Universiteit Utrecht, The Netherlands
Get access

Summary

Consider a communication network in which processors want to transmit many short messages to each other. The processors are not necessarily connected by a communication channel. Usually this service is provided for by protocols in the transport layer. A protocol can incorporate such a message in a packet and send the packet to the destination processor. As discussed in chapter 1, in the transport layer it is again necessary that communication errors are considered, even though we can assume that the communication over channels is handled correctly by the lower layers. -Thus we have to assume that the communication network can lose packets, copy packets (due to necessary retransmissions), delay packets arbitrarily long, and deliver packets in a different order than the order in which they were sent.

We consider the design of some protocols that handle the communication of messages correctly, in the sense that there is no loss or duplication of messages (cf. Belsnes [Bel76]). To specify this more precisely, suppose processor i wants to transmit a message m to processor j. The message m is said to be lost if i thinks that j received m while this is not the case, and m is said to be duplicated if j receives two or more copies of m from i and thinks that they are different messages.

If a processor i has a message or a sequence of messages to send to j, it sets up a temporary connection with j, which is closed as soon as i knows that j received the message(s) (or that j is not in a position to receive them).

Type
Chapter
Information
Publisher: Cambridge University Press
Print publication year: 1996

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Save book to Kindle

To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.

Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

Find out more about the Kindle Personal Document Service.

Available formats
×

Save book to Dropbox

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.

Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

Available formats
×