Page 107 - Kaleidoscope Academic Conference Proceedings 2020

Industry-driven digital transformation

3.2.2 Boosting power based on overlapping resource parameters for different transmission time-frequency
proportion resources further improves the accuracy of power control.

Multiple overlapping resource proportion thresholds are 3.3 Design for dynamic selection of DPCI and
defined in advance, among which the overlapping resource ROPC
proportion is defined as the proportion of overlapping
resources to URLLC resources. The threshold includes:
10%, 40%, 80%. Table 2 defines a mapping relationship
between the actual overlapping resource proportion x and a
power promotion value. For example, the overlapping
resource proportion is 40%, if URLLC resource is 10 RB and
the overlapping resource is 4 RB. In such cases, the cell center
transmission power of URLLC will be increased by 3dB.
cell edge

URLLC UE(without Power Constrained )
Time-frequency Time-frequency Time-frequency
resource indication resource indication resource indication URLLC UE(Power Constrained)
field 1 field 2 field n eMBB UE(support DPCI)
eMBB UE(do not support DPCI)
Time-frequency resource indication field
Figure 7 – An example for the dynamic selection
Figure 6 – Time-frequency resource indication field
In this subsection, we combine DPCI with ROPC to obtain
The execution procedure of ROPC is summarized as follows: better performance. Two methods for the multiplexing
application can be considered in the service multiplexing
a. The gNB determines which group of URLLC time- system model, and the most suitable method is selected for
frequency resources overlaps with the eMBB. execution in one TTI. Figure 7 shows an example for

b. The gNB computes the overlap proportion between dynamic selection multiplexing methods based on the
each group of URLLC time-frequency resources and location and function configuration of the UE. There are both
eMBB time-frequency resources. a URLLC UE and eMBB UE in a cell. For the URLLC UE,
one kind of UE can perform ROPC without the power
c. The gNB sends the control information carrying the constrained, and the other kind cannot perform PC with the
index of power control parameters corresponding to power constrained. For an eMBB UE, one kind of UE
each resource group according to the calculation result supports DPCI, and the other kind does not support DPCI. In
of the 2 step. practical application, there are three options for multiplexing
nd
scheduling: ROPC, DPCI and no scheme, and Figure 8
d. The URLLC UE receives and decodes the control shows the selection procedure of the multiplexing
information of ROPC. mechanism.

e. The URLLC UE determines the power value to be
enhanced for each group time-frequency resource START
according to the index in the time-frequency resource
indication field.
N Y
DPCI first?
Table 2 – Power boosting value according to actual
overlapping resource proportion
URLLC UE power N Performing eMBB UE support
Actual overlapping Power constrained？ ROPC DPCI？
Index Y
resource proportion x boosting(dB)
Y END N
0 x ≤ 10% 0
1 10% < x ≤ 40% 3 eMBB UE support Y Performing N URLLC UE power
2 40% < x ≤ 80% 6 DPCI？ DPCI constrained？
3 x > 80% 9
N END Y
The introduction of overlapping resource proportion enables
a URLLC UE to adjust the transmission power to be optimal, No scheme
while limiting the interference for the eMBB transmission.
What’s more, interpreting different power control END
Figure 8 – The dynamic selection procedure

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