Flexible Multiplexing Mechanism for Coexistence of URLLC and EMBB Services in 5G Networks

doi:10.12142/ZTECOM.202102011

Abstract

Abstract:

5G mobile networks are envisioned to support both evolved mobile broadband (eMBB) and ultra-reliable and low latency communications (URLLC), which may coexist and interfere with each other in the same service cell in many scenarios. In this paper, we propose a dynamic 2-dimension bitmap resource indication to cancel eMBB services with a finer uplink cancellation granularity and a lower probability of false cancellation. Meanwhile, a resource indication based power control method is introduced to dynamically indicate different power control parameters to the user equipment (UE) based on different time-frequency resource groups and the proportion of overlapping resources, by which the reliability of URLLC transmission is guaranteed while the impact on the performance of the eMBB service is minimized. Furthermore, a dynamic selection mechanism is proposed to accommodate the varying cases in different scenarios. Extensive system level simulations are conducted and the results show that about 10.54% more URLLC UE satisfy the requirements, and the perceived throughput of eMBB UE is increased by 23.26%.

Key words: 5G, eMBB, power control, resource indication, uplink cancellation, URLLC

XIAO Kai, LIU Xing, HAN Xianghui, HAO Peng, ZHANG Junfeng, ZHOU Dong, WEI Xingguang. Flexible Multiplexing Mechanism for Coexistence of URLLC and EMBB Services in 5G Networks[J]. ZTE Communications, 2021, 19(2): 82-90.

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Figures/Tables 19

Figure 1

Figure 2

Figure 3

Figure 4

Table 1

Figure 5

Figure 6

Table 2

Figure 7

Figure 8

Table 3

System-level simulation assumptions"

Parameters	Value
Carrier frequency	4 GHz
Simulation bandwidth	40 MHz
SCS	30 kHz
Channel model	UMa in TR 38.901
Antenna configuration	4 receiving antenna ports 2 transmitting antenna ports
gNB receiver	MMSE-IRC
Cell load setup	K_eMBB: 5, 10, 20, K_URLLC: 5, 10, 20 $Ω = K U R L L C, K e M B B$
TTI configuration	URLLC: 2, 3, 4 OFDM symbols eMBB: 14 OFDM symbols
HARQ	Max number of transmissions=4 with target BLER=0.01%(URLLC) or 10%(eMBB)
Traffic model	eMBB: ? Packet arrival per UE: FTP Model 3 ? Packet size: 50–600 bytes URLLC: ? Packet arrival per UE: periodic with arrival rate of 1 packet per 2 ms ? Packet size: 32 bytes
UE distribution	80% of users are outdoors 20% of users are indoors
eMBB UE function configuration	90% of users support DPCI 10% of users do not support DPCI

Table 3

Figure 9

Figure 10

Figure 11

Figure 12

Table 4

Percentage of UE satisfying reliability and latency requirements for URLLC transmission in different multiplexing methods"

Multiplexing Method	$Ω = 5,10$	$Ω = 10,10$	$Ω = 20,10$
No scheme/%	84.37	78.64	66.71
BCI/%	93.33	89.87	80.64
DPCI/%	93.27	89.64	80.62
BPC/%	87.78	83.97	73.84
ROPC/%	88.34	86.47	76.77

Table 4

Figure 13

Figure 14

Table 5

Percentage of UE satisfying reliability and latency requirements for URLLC transmission in different baseline methods and the dynamic selection mechanism"

Combination Case	$Ω = 5,10$	$Ω = 10,10$	$Ω = 20,10$
BCI/%	93.33	89.87	80.64
BPC/%	87.78	83.97	73.84
DPCI&&ROPC/%	96.14	92.99	84.38

Table 5

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BCI	the number of OTDOs	1–7
BCI	FDIG	1/4
DPCI	the number of OTDOs	1	2	3	4	5	6	7
DPCI	FDIG	1/21	≤1/10	1/7	≤1/5	≤1/4	≤1/3	1/3

Index	Actual Overlapping Resource Proportion x	Power Boosting/dB
0	x ≤ 10%	0
1	10% < x ≤ 40%	3
2	40% < x ≤ 80%	6
3	x > 80%	9

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