This paper presents novel ultrareliable and low-latency communication (URLLC) techniques for URLLC services, such as Tactile Internet services. Among typical use cases of URLLC services are teleoperation, immersive virtual reality, cooperative automated driving, and so on. In such URLLC services, new kinds of traffic such as haptic information including kinesthetic information and tactile information need to be delivered in addition to high-quality video and audio traffic in traditional multimedia services. Furthermore, such a variety of traffic has various characteristics in terms of packet sizes and data rates with a variety of requirements of latency and reliability. Furthermore, some traffic may occur in a sporadic manner but requires reliable delivery of packets of medium to large sizes within a low latency, which is not supported by current state-of-the-art wireless communication systems and is very challenging for future wireless communication systems. Thus, to meet such a variety of tight traffic requirements in a wireless communication system, novel technologies from the physical layer to the network layer need to be devised. In this paper, some novel physical layer technologies such as waveform multiplexing, multiple-access scheme, channel code design, synchronization, and full-duplex transmission for spectrally efficient URLLC are introduced. In addition, a novel performance evaluation approach, which combines a ray-tracing tool and system-level simulation, is suggested for evaluating the performance of the proposed schemes. Simulation results show the feasibility of the proposed schemes providing realistic URLLC services in realistic geographical environments, which encourages further efforts to substantiate the proposed work.
Bibliographical noteFunding Information:
Manuscript received January 5, 2018; revised June 19, 2018; accepted August 24, 2018. Date of publication September 27, 2018; date of current version January 22, 2019. This work was supported by the Institute for Information & communications Technology Promotion (IITP) Grant funded by the Korea Government (MSIT) (2015-0-00300, Multiple Access Technique with Ultra-Low Latency and High Efficiency for Tactile Internet Services in IoT Environments). (Corresponding author: Kwang Soon Kim.) K. S. Kim, D. K. Kim, J. Kim, M. Yang, K. Lee, and K. L. Ryu are with the School of Electrical and Electronic Engineering, Yonsei University, Seoul 03277, South Korea (e-mail: firstname.lastname@example.org). C.-B. Chae and Y.-G. Lim are with the School of Integrated Technology, Yonsei University, Seoul 03277, South Korea. S. Choi and S. Kim are with the Department of Electrical and Computer Engineering, Seoul National University, Seoul, South Korea. Y.-C. Ko and B. Lim are with the School of Electrical Engineering, Korea University, Seoul 02841, South Korea.
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All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering