Tactile Internet


Technical Overview

As the Internet of things is spreading, various types of services that have not been imagined before are being produced. Among them, Tactile internet, which enables real-time connection between people and objects, is receiving the most attention. The term “tactile communication” refers to wired / wireless communication that has an extremely short response time to a user request so that the user can not notice the awkwardness even if the tactile information most sensitive to the delay time of the human being is provided on the Internet. It can provide new services that were impossible with technology. The main services of the tactile communication include a virtual world for exchanging tactile information, automatic control of high-speed mobile objects such as automobiles / drums, real-time situation relaying, and real-time interactive games.

In order to realize such a tactile communication service, a wireless communication network must have a high response speed (ultra-low latency), a high spectral efficiency to transmit a UHD ultra-high definition three-dimensional hologram and the like (high spectral efficiency) Various devices must be massive connectivity. For tactile communication, the delay time between sensor and actuator should be less than 1ms. In particular, the delay time of the radio section should be within about 0.5 ms. However, LTE-A Long Term Evolution Advanced, which is a 4th generation mobile communication system, can not realize tactile communication because the delay time between the base station and the terminal exceeds 50 ms. In addition, for tactile communication, a high-capacity, high-capacity mobile communication network of Gbps in order to receive sensible media is required, and a plurality of users must be able to access the same at the same time.

Therefore, in order to realize tactile communication service in the Internet environment of objects, 1) delay time between base station and terminal within 0.5ms, 2) next-generation next generation which can provide frequency efficiency per cell more than 10 times of LTE-A and large- Multiple access technology is needed. Research on next generation multi-access technology for tactile communication is still in its beginning stage. In order to lead the next generation mobile communication source technology and to lead the standardization, it is necessary to have differentiated source from existing technology and representative of mobile communication technology for 5G and B5G Next-generation multiple access technology with new concept is needed. By researching, developing, implementing, and verifying the next-generation multiple access technology of new concept, it is necessary for domestic technology to lead the development of next generation mobile communication technology while competition is intense worldwide.

Research Results and Evaluation Methods

Simulation of the integrated protocol The SW test bed implements the protocol protocol developed by SW and interworks with the HW test bed measurement to measure the radio area delay time probability density function in various scenarios. In the fourth year, the channel code processing delay time Considering. System level simulation SW test bed is implemented by MATLAB using channel model according to recommended methodology of standardization organization and developed multi-connection technique of waveform modulation and demodulation technique, and it is used to measure probability density function of frequency efficiency per cell

When verifying through the construction of Waveform HW testbed, the real-time delay time at which data reception is completed in receiver HW is measured through HW measurement equipment from the time data is input to test bed transmitter HW. The hardware parameters of the base station and the terminal are used by borrowing the simulation parameters according to the scenarios used by the standardization bodies such as 3GPP / IEEE802.11, and the parameters not shown are set based on objective papers, articles, and white papers

The quantitative goal in this study is to verify the performance by integrating the above developed wave form technology and radio access technology and comparing it with numerical analysis