Channel Element
Efficiency for
EUL Trial impact
report
FAJ 121 3214
Overview
› This slide pack contains a summary of results of Channel Element
Efficiency for EUL feature performed over 5 sites in Nabeul area.
› The feature reduces the static Uplink (UL) Channel Element (CE) cost
for Enhanced Uplink (EUL) 2ms TTI users from two CEs to one CE.
› With the feature activated :
Reduced UL CE cost for EUL 2ms TTI users.
Twice as many EUL 2ms TTI users can be set up.
EUL 2ms TTI users can now have the same static cost as EUL10ms
TTI users.
The number of EUL 2ms TTI users can be higher, which offers higher
data rates and better latency than EUL 10ms TTI.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 2
Technical Details
› Channel Element Efficiency for EUL(FAJ 121 3214) has been activated over 5
sites situated in Nabeul region:
› The activation has been done on 30th oct 2018.
› This feature requires the feature Channel Element capacity for EUL
Smartphones (FAJ 121 1883) to be active.
› RBS restart is required after feature implementation in order to be effective.
› The implementation of this feature affects no parameters.
Site
3G_Abbattoi r_Sol i men
3G_Ci te_Mous s a
3G_DAR_ChAABANE_LYCEE
3G_GROMBALIA
3G_KORBA_III
licenseStateCeEfficiencyEul featureStateCeEfficiencyEul
1 (ENABLED)
1 (ENABLED)
1 (ENABLED)
1 (ENABLED)
1 (ENABLED)
1 (ACTIVATED)
1 (ACTIVATED)
1 (ACTIVATED)
1 (ACTIVATED)
1 (ACTIVATED)
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 3
Avg static UL CE for EUL :
Avg static UL CE cost for EUL has as expected reduced which will
increase the headroom for all UL services.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 4
static UL CE usage:
Static UL CE usage has reduced as expected.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 5
NB EUL 2ms request denied :
Number of EUL2ms requests denied since its above the parameter
eulServingCellUsersAdmTti2 has increased which means that more
number of EUL 2ms TTI users can be setup since static ULCE
headroom increased.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 6
NB EUL 2ms requests denied :
Number of EUL2ms requests denied has mainly increased in
3G_DAR_CHAABANE_LYCEE that having
eulServingCellUsersAdmTti2=16 so I recommend increasing to 32,
so more EUL 2ms users can be set-up.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 7
UL HW Admission Rejection
Rejection due to lack of UL HW has diminished after Feature
activation.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 8
Accessibility
BEFORE
AFTER
RAB EUL (%)
99.05
99.15
RAB HS (%)
99.12
99.21
CSSR PS(%)
98.74
98.81
CSSR CS (%)
99.63
99.65
Accessibility is slightly improved and its above the target threshold
98%,
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 9
Retainability
BEFORE
AFTER
CS _Drop(%)
0.40
0.38
PS_Drop(%)
0.98
0.77
HSPDA_Drop
0.52
0.48
EUL_Drop
0.52
0.47
Retainability has generally improved and its very clear in PS Drop
This improvement is not related to this feature, the important thing
we can conclude that feature does not affect drop negatively
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 10
Avg EUL users:
Avg EUL users trend is almost stable.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 11
EUL2m Throughput
EUL2m Throughput is almost stable.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 12
EUL10ms Throughput:
EUL2m Throughput is almost stable.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 13
Upswitch to RAB EUL
Upswitching to EUL RAB remained almost stable.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 14
Conclusion
› Channel Element Efficiency for EUL has showed its main
benefit which is reducing static UL CE cost for EUL which
will increase the headroom for all UL services.
› Reduce rejection due to lack of UL HW  Enhance
Accessibility.
LTE Initial Tuning Cluster Throughputs LTE 1800 | Ericsson Internal | EAB-13:072947 Uen, Rev A | 2013-12-09 | Page 15