Page 103 - Kaleidoscope Academic Conference Proceedings 2020

FLEXIBLE MULTIPLEXING MECHANISM FOR COEXISTENCE OF URLLC AND eMBB
SERVICES IN 5G NETWORKS

1,2 1,2 1 1 1 1 1
Kai Xiao , Xing Liu , Xianghui Han , Peng Hao , Junfeng Zhang , Dong Zhou , Xingguang Wei
1 ZTE Corporation, China
2 State Key Laboratory of Mobile Network and Mobile Multimedia, China

ABSTRACT by mMTC [3], [4]. From the current development trend, 5G
mainly focuses on eMBB for basic daily needs and URLLC
5G mobile networks are envisioned to support both evolved for emerging industries. Generally, the priority of a URLLC
mobile broadband (eMBB) and ultra-reliable and low service is higher than that of an eMBB service [5] to [7]. In
latency communications (URLLC), which may coexist and practical application, eMBB services and URLLC services
interfere with each other in the same service cell in many will appear in the same network, and the scheduling of a
scenarios. In this paper, we propose a dynamic 2-dimension URLLC service by gNB will inevitably conflict with the
bitmap resource indication to cancel eMBB services with a eMBB service as the triggering of the URLLC service is
finer uplink cancellation granularity and a lower probability sporadic [8]. Once the URLLC service arrives, the gNB shall
of false cancellation. Meanwhile, a resource indication allocate appropriate uplink (UL) resources for it as soon as
based power control method is introduced to dynamically possible to meet the stringent latency requirements. However,
indicate different power control parameters to the user the resources may have been allocated to uplink data
equipment (UE) based on different time-frequency resource transmission for eMBB in advance. The latency and
groups and the proportion of overlapping resources, by reliability requirement of URLLC transmission can hardly be
which the reliability of URLLC transmission is guaranteed guaranteed due to no resource being used within a certain
while the impact on performance of the eMBB service is time interval [9], [10]. Therefore, it is valuable to study how
minimized. Furthermore, a dynamic selection mechanism is to multiplex the transmission resources between a URLLC
proposed to accommodate the varying cases in different service and eMBB service.
scenarios. Extensive system level simulations are conducted
and the simulation results show that about 10.54% more Currently, power control and UL cancellation indication (CI)
URLLC UEs satisfy the requirements, and the user perceived mechanisms are introduced into the Third Generation
throughput of eMBB UEs is increased by 23.26%. Partnership Project (3GPP) protocol as two independent and
basic solutions to URLLC and eMBB service multiplexing
Keywords - 5G, eMBB, power control, resource indication, [11]. However, these baseline methods have some inherent
uplink cancellation, URLLC disadvantages. More specifically, the baseline cancellation
indication (BCI) method is based on the semi-static 2-
1. INTRODUCTION dimension (2-D) bitmap implementation. However, the
URLLC service is dynamic and mutative, and the semi-static
Wireless communication services cover more and more pattern indication is difficult to meet the changing service
application scenarios, with the increasing degree of social requirements [12]. For the baseline power control (BPC)
digitization. Among them, enhanced mobile broadband method, the power boosting is based on a relatively fixed
(eMBB), ultra-reliable and low latency communication value. For some cases where the proportion of overlapping
(URLLC) and massive machine type of communication resources over all scheduled resources is very small, the
(mMTC) have become three major scenarios supported by fixed setting of power boosting value will cause power waste
fifth generation (5G) systems [1], [2]. Large flow mobile and degrade the eMBB performance [13]. On the other hand,
broadband services such as ultra-high definition and 3D the BPC cannot further boost power to protect URLLC
video are mainly included with eMBB, providing the transmission in the case of poor channel quality [14]. This
ultimate communication experience for people. Driverless, paper is mainly to solve these existing technical problems
industrial automation and so on are mainly covered by above.
URLLC, requiring low-latency data and an extremely
reliable connection, i.e., one-way latency up to 1 ms with 10 - In this work, a dynamic pattern cancellation indication
5 outage probability. The scene of large-scale machine class (DPCI) is proposed for making up the shortcomings of BCI.
communication in the Internet of things is mainly supported The proposed DPCI method enhances the current 2-D bitmap

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