Skip to Content
Uncategorized

Tuning the Internet for Mobility

October 27, 2010

The Internet is becoming the de facto standard for all telecommunications; services like voice-over-IP and Internet Protocol television are overtaking the technologies purpose-built for telephones and televisions. But the protocols underlying the Internet make assumptions about physical connections that do not always fit well with wireless communications: that all links are generally the same and provide close to real-time connectivity from one end of the link to the other. Wireless services are often intermittent, vary widely in the amount of bandwidth they offer, and, especially in the case of satellite services, can lag, making websites sluggish to respond to clicks. As new applications place new demands on Internet-based networks, “maybe it makes more sense to think about some radically different architectures,” says Preston Marshall, director of the wireless-­networking division at the University of Southern California’s Information Sciences Institute and a former manager for many of the advanced wireless technology programs at the Defense Advanced Research Projects Agency (DARPA).

NASA is testing delay-tolerant networking to allow researchers to monitor experiments onboard the International Space Station.

This kind of thinking informs efforts to integrate technologies such as delay-­tolerant networking (DTN) with Internet protocols. Because DTN allows communication even when establishing an end-to-end link is impossible, it would make networks more robust. It’s also well suited for applications such as machine-to-machine communication. For example, a meter on a “smart” electric grid may need to exchange only small amounts of data with the power company within a relatively broad window of time; it doesn’t need a high-bandwidth real-time connection.

Beyond DTN, it may ultimately be possible to shift between different kinds of wireless links from moment to moment, depending on the type of data to be accessed. A user could browse for a movie title using a low-lag but low-bandwidth cellular connection and then download the movie over a high-lag, high-bandwidth satellite connection.

Deep Dive

Uncategorized

Our best illustrations of 2022

Our artists’ thought-provoking, playful creations bring our stories to life, often saying more with an image than words ever could.

How CRISPR is making farmed animals bigger, stronger, and healthier

These gene-edited fish, pigs, and other animals could soon be on the menu.

The Download: the Saudi sci-fi megacity, and sleeping babies’ brains

This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. These exclusive satellite images show Saudi Arabia’s sci-fi megacity is well underway In early 2021, Crown Prince Mohammed bin Salman of Saudi Arabia announced The Line: a “civilizational revolution” that would house up…

10 Breakthrough Technologies 2023

Every year, we pick the 10 technologies that matter the most right now. We look for advances that will have a big impact on our lives and break down why they matter.

Stay connected

Illustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at customer-service@technologyreview.com with a list of newsletters you’d like to receive.