Page 114 - Kaleidoscope Academic Conference Proceedings 2020

2020 ITU Kaleidoscope Academic Conference

lifetimes, and security [9]-[11]. In this new application has been greatly improved compared with the previous
scenario, [12] and [13] report the suitability and achievable cellular mobile communication technology. URLLC has two
-5
performance figures of industrial networks. As mentioned in basic features: high reliability and low latency, such as 10
-6
[14], LPWAN (low-power wide area network) is a new type or 10 BLER (block error rate) performance, 0.5 ms or 1 ms
of wireless network of IoT, which is applied to indoor air interface transmission delay. As one of the three
industrial monitoring [15], intrusion detection [16], remote application scenarios of 5G system, URLLC is widely used
monitoring and smart cities [17] with the help of robust in various industries, such as AR/VR in the entertainment
communication, wide coverage ranges and low power industry, industrial control system, transportation,
consumption. management of smart grid and smart home, and interactive
telemedicine diagnosis [21]. This document will introduce
the development of 3GPP in Rel-15 and Rel-16 for URLLC
in reducing delay and enhancing reliability, as well as the
research on little jitter and high transmission efficiency.

Table 1 – Communication service performance
requirements

Communica- Transfer Jitter Remarks
tion service interval:
availability: target
target value value

99.999 % to 500 μs <50% of Motion control
99.99999 % E-to-E
latency
Figure 1 - The relationship between digital twins and
Internet 99.9999 % to ≤ 1 ms Wired-2-wireless
99.999999 % 100 Mbit/s link
replacement
IIoT will completely change the manufacturing industry by
acquiring and accessing higher data rates and be more > 99.9999 % 1 ms to < transfer Mobile robots
efficient than before; examples are smart manufacturing, 50 ms interval
smart agriculture, smart cities, smart home, smart health care,
smart transportation, etc. IIoT promotes the strong demand 99.9999 % to 4 ms to < 50% of Mobile control
for more data acquisition, communication, real-time analysis 99.999999 % 8 ms interval panels – remote
and data-driven decision-making in various industrial control of e.g.
vertical fields. Automation in different vertical domains have assembly robots,
been developing rapidly. But limited to the radio milling machines
technologies, CAPEX (capital expenses) and OPEX
(operating expenses), the communication technology of the 99.999999 % 1 ms Mobile Operation
vertical domain development is mainly confined to the local Panel: Motion
Area Network, or even a wire connection network. Although control
the cellular radio communication technology such as NB-IoT,
eMTC, or LoRa, etc. can serve some IoT use cases, it cannot > 1 ms Robotic Aided
satisfy the requirements for all the IoT use cases, e.g. use 99.999999% Surgery
cases [18][ and 19] cannot be served perfectly by the legacy
cellular IoT system in Table 1. > 99.999% 1 ms Robotic Aided
Diagnosis
Generally, the use cases that cannot be satisfied by the legacy
cellular IoT system will have rigorous requirements for low 2.1 Low latency
latency, high reliability, little jitter and/or frequent small data
transmission. IIoT is mainly focused on providing wireless The 5G URLLC technology achieves a user plane delay of
communication for these use cases. 0.5 ms in both the uplink and downlink between the gNB and
the terminal. The delay refers to the time it takes to
2. DEVELOPMENT AND RESEARCH ACTUALITY successfully transmit application layer IP packets/messages,
FOR IIOT TECHNOLOGY specifically from the sender's 5G wireless protocol layer
entry point, via 5G wireless transmission to the receiver's 5G
With the rise of IIoT and the advent of Industry 4.0, the wireless protocol layer exit point. Among them, the delay
application of ultra-reliable and low latency communications comes from both the uplink and downlink directions. The
(URLLC) in the IIoT field has attracted more and more main technologies used by the 5G URLLC to implement low
attention [20]. In terms of delay and reliability, 5G URLLC latency include: 1) Introducing a smaller time resource unit,

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