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電子情報通信学会 - IEICE会誌 試し読みサイト
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電子情報通信学会 - IEICE会誌 試し読みサイト
© Copyright IEICE. All rights reserved.
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1. 第5世代移動通信システム「5G」とは
特集1-4
5G Trial in the Pyeongchang Olympic Games
abstract
5G mobile system is known to have such characteristics as Ultra High Speed, Ultra Low Latency, and Massive Connectivity. As an official partner of 2018 Pyeongchang winter Olympic Games for ICT services, KT had announced it would build 5G network in the Olympic venue area to show new services and applications based on those characteristics, and showed successfully 5G trial services in the Games last February.
In this article, we are going to look at the 5G trial networks and services in detail, along with some lessons learned from the trial, and also going to share some of our thoughts about future plan for 5G commercialization briefly.
Keywords：Winter Olympic Games, Pyeongchang, 5G trial services, 5G networks, 5G commercialization
5G refers to new mobile communication technology with the advanced features of Ultra High Speed, Massive Connectivity, and Ultra Low Latency, evolving beyond LTE(1). Global standardization bodies such as 3GPP has grouped 5G key concepts more specifically into 3 different categories, that is, eMBB (enhanced Mobile Broadband), mMTC (massive Machine Type Communications), URLLC (Ultra-Reliable and Low Latency Communications).
eMBB means that 5G can support a lot higher data rate and mobility than current 4G LTE, enabling high speed internet access or 3D/UHD (Ultra High Definition) streaming services over wireless. In case of mMTC, a large number of devices and sensors can be connected to the network simultaneously to provide, for example, Smart Home or Smart City services. Finally, URLLC, one of the most differentiated features of 5G, guarantees data transmission within very short delays of several milliseconds, making such use cases possible as fine control of industrial machines, remote surgery robot control, autonomous vehicle, etc(2).
Meanwhile, 3GPP has been trying to standardize 5G technical specifications with the target of submitting Radio Transmission Technology (RTT) proposal for IMT-2020. It started the work with several studies, resulting in a group of 5G TRs (Technical Report) in Release 14 & 15 and will move forward to specify more enhanced features in Release 16. The main content of Release 14 TRs is about the feasibility study of 5G candidate technologies and key requirements for use cases and services(3). 3GPP released the first set of 5G specifications 6 months earlier than expected at the end of 2017.
KT has been doing a lot of researches and collaborations to develop 5G technologies and services for 2018 Pyeongchang Olympic trial for the last 3 years after its CEO announced 5G vision in MWC 2015 for the first time(4). We will give a brief introduction to the technologies and the pilot services, along with the network architecture upon which they are based in the following sections.
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