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The Tactile Internet will be the next evolution of the Internet of Things (IoT), encompassing human-to-machine and machine-to-machine interaction. It will enable real-time interactive systems with a raft of industrial, societal and business use cases.

What is the Tactile Internet?

The International Telecommunication Union (ITU) defines the Tactile Internet as an internet network that combines ultra low latency with extremely high availability, reliability and security. It believes the Tactile Internet represents a “revolutionary level of development for society, economics and culture”.

The mobile internet allowed us to exchange data and multimedia content on the move. The next step is the IoT, which is enabling the interconnection of smart devices. The Tactile Internet is the next evolution that will enable the control of the IoT in real time. It will add a new dimension to human-to-machine interaction by enabling tactile and haptic (see following section for definition) sensations, and at the same time revolutionise the interaction of machines.

The Tactile Internet will enable humans and machines to interact with their environment, in real time, while on the move and within a certain spatial communication range. It will unleash the full potential of the fourth industrial revolution, dubbed Industry 4.0, and revolutionise the way we learn and work through the Internet of Skills, aka Human 4.0.

Proponents of the Tactile Internet argue that it should build on areas where machines are strong and humans are weak, so that the machines complement rather than substitute humans. As the power of the machines increases, the value of the human input should also grow.

How will the Tactile Internet work?

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Stitch Elsie Island Cream Jumper River Stitch Elsie Jumper Cream Island River In principle all human senses can interact with machines, and technologies to enable and enhance that interaction will deliver the Tactile Internet.

The Tactile Internet will enable haptic interaction with visual feedback. The term haptic relates to the sense of touch, in particular the perception and manipulation of objects using touch and proprioception. Proprioception is the sense of the relative positioning of the parts of one’s body and the strength of effort used in movement.

The visual feedback will encompass not just audiovisual interaction, but also robotic systems that can be controlled in real time as well as actuating robots, ie those that can activate a motion.

In order for technical systems to match human interaction with their environment, they must meet the speed of our natural reaction times. As such, 1ms end-to-end latency is necessary for Tactile Internet applications. The underlying network must also be ultra reliable as many critical tasks will be executed remotely and it must rely on cheap edge infrastructure in order to enable scale. It will therefore need 5G as the underlying network infrastructure.

The Tactile Internet will combine multiple technologies, both at the network and application level. At the edges, the Tactile Internet will be enabled by the IoT and robots. Content and data will be transmitted over a 5G network, while intelligence will be enabled close to the user experience through mobile edge computing. At the application level, automation, robotics, telepresence, augmented reality (AR), virtual reality (VR) and artificial intelligence (AI) will all play a part.

River Elsie Cream Island Stitch Jumper What are the use cases?

The better question might be ‘What aren’t the use cases?’, as the list is seemingly endless! The examples given here should give a good indication of the broad range of possibilities, but it’s clear that the Tactile Internet will have applications that haven’t yet been conceived of.

Automation, robotics and telepresence are already growing in importance in industrial applications like smart factories and the remote operation of industrial machinery. The Tactile Internet will take the possibilities still further, enabling the efficient manufacturing of highly customised products, remote mining in high-risk areas, and remote inspection, maintenance and repair of everything from industrial plant to airplanes.

In healthcare, medical expertise is still largely confined to the location of the physician, but in the world of the Tactile Internet it will be available anywhere and at any time. The physician will be able to command a tele-robot at the patient’s location, allowing remote physical examination with full AV and haptic feedback. The first tele-surgical operation was carried out as early as 2001 but telesurgery is still not mainstream due to the limitations of robotics and the underlying communications technology. It will be widely enabled by the Tactile Internet.

Robotic exoskeletons will be used for tele-rehabilitation and exoskeleton-based artificial limbs will improve the lives of people with disabilities.

VR headsets are gaining traction in the world of gaming but the development of interactive applications has been limited by the high latency of the current internet, curtailing the number of active players and the distances between them. The Tactile Internet will remove these limitations and open up greater opportunities in non-entertainment gaming. So-called Serious Games have wide applications in fields such as healthcare, education, training and simulation.

Education and training will be further enhanced by the haptic overlay of the learner and teacher. The teacher will be able to feel the learner’s movement when s/he undertakes a task involving fine motor skills, and correct as necessary. The learner will be able to see, hear and feel the exact movements their trainer has made, be they an engineer, pilot or surgeon. The concept of ‘hands on’ will take on a whole new meaning!

And the ability to remotely learn and deliver skills (for example in remote maintenance work) has led to the term the Internet of Skills, which promises to democratise labour as the internet democratised knowledge. Heady stuff indeed!

Who’s involved?

The term Tactile Internet was coined in early 2014 by Professor Gerhard Fettweis from the Technical University of Dresden in Germany. The ITU defined it in August 2014 in its Technology Watch, which assesses new technologies with regards to existing standards and their potential impact on future standardisation.

The ITU Technology Watch was prepared by representatives from a number of German academic bodies, as well as Telekom Deutschland, Robert Bosch and the local arms of Vodafone and equipment vendors Alcatel-Lucent, Ericsson and Nokia. Fettweis was the principal author and the TU-Dresden 5G Lab Germany is one of two academic bodies which aim to be at the forefront of developments into the Tactile Internet. The other is King’s College London Tactile Internet Lab, led by Professor Mischa Dohler, which is part of the collaboration between King’s College and Ericsson announced in March 2015.

The two professors, and other members of their teams as well as a representative from Ericsson Research in Sweden, authored an Institute of Electrical and Electronics Engineers (IEEE) article on 5G-Enabled Tactile Internet in 2016 and are recognised as leaders in the field.

The IEEE launched its Digital Senses Initiative (DSI) in June 2015 to advance technologies that capture and reproduce stimuli (sight, hearing, touch, smell and taste).

Island Stitch Elsie River Jumper Cream In July 2017, the government awarded £16m in funding to King’s College, the University of Surrey (which is home to the UK’s 5G Innovation Centre) and the University of Bristol to link the three sites via 5G test beds for the development, testing and trial of 5G technologies and applications.


As with the IoT, the full possibilities of the Tactile Internet will not be realised – or even known – until 5G becomes reality. While many of the core underlying technologies have been around for years, widespread implementation has been constrained by the limits of current networks.

The first practical indications of the Tactile Internet began emerging in 2014 and 2015. The oPhone and later oNotes app allowed users to add smell to their reading or listening experience (and have morphed into the Cyrano digital scent speaker). The Apple Watch launched with haptics that gave alerts about new notifications via small vibrations the wearer felt on their wrist.

More advanced, but not yet commercially available, Huawei demonstrated the TAC-2020 robot artist at Mobile World Congress Shanghai in 2015, which reproduced every stroke drawn by a human on a tablet onto canvas, precisely and synchronously.

It is still a way off, but when it arrives the Tactile Internet has the potential to re-shape the way we live, work and play.

About Sacha Kavanagh

Research Analyst/ Technical Writer

Sacha has more than 20 years’ experience researching and writing about IT, enterprise tech, data centres and telecoms. Specialising in Freelance Research, Writing and Analysis. She is a regular contributor to 5G.co.uk, writing guides and articles on all aspects of 5G.

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