64-QAM Uplink
Feature Number: FAJ 121 4363
License Number: CXC 401 1946
Feature Status: L16A (new)
Background/Problem
Description
› Before LTE release 12, the highest uplink modulation is 16
QAM. This limits the user peak rate for users who
experience excellent link quality.
› The introduction of 64 QAM in uplink allows users with
excellent link quality to take advantage of the channel
condition to achieve higher uplink throughput.
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 3
Feature overview
› Support of 64 QAM modulation in the uplink for
Category 5 UEs defined in Release 8 and onwards,
as well as UL-Category 5 and 13
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 4
Benefits and gains
› Allows uplink peak rates of up to 70 Mbps for 64 QAM
capable UEs in FDD 20 MHz bandwidth
› Increases uplink throughput for 64 QAM capable UEs
in good coverage areas
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 5
Feature description
› The feature enables higher uplink data throughput for
UEs with Category 5, UL Category 5 and UL Category
13 capability as defined in 3GPP TS 36.306 v12.4.0.
› A power offset to pZeroNominalPusch is used in order
to achieve a higher target SINR which is required for
selecting the most efficient MCS
› The feature supports FDD and TDD
› The feature is optional and under license control.
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 6
Dependency to Other
features
› For optimal uplink throughput this feature is best used
together with the following other throughput enhancing
features.
– Uplink Multiuser MIMO
– Uplink Carrier Aggregation
– Multi-Clustered PUSCH
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 7
Dependency to
Standards
› The feature is introduced in 3GPP release 12.
› The feature is described in
–
–
–
–
–
–
3GPP TS 36.211 v12.5.0
3GPP TS 36.212 v12.4.0
3GPP TS 36.213 v12.5.0
3GPP TS 36.331 v12.5.0
3GPP TS 36.306 v12.4.0
3GPP TS 36.104 v12.7.0
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 8
Dependency to Other
Network Elements
› The feature works with UEs with Category 5, UL Category
5 and UL Category 13 capability.
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 9
Limitations
› Uplink cell throughput is also subjed to a per DU
capacity limit.
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 10
Configuration
Management
› New MOM attributes:
– EUtranCellFDD/EUtranCellTDD::Ul64QamEnabled
› Enable/disable the UL 64 QAM feature on cell level.
› Only relevant if the license for UL 64-QAM is present and the feature is active.
› Default enabled.
– EUtranCellFDD/EUtranCellTDD::puschPwrOffset64Qam
› Power offset to the target received PUSCH Power Spectral Density (PSD) for 64QAM-capable UEs. This is used to control the received SINR target.
› It is used to enable maximum throughput for 64QAM, which in some configurations
is not possible otherwise.
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 11
Configuration
management
› New MO Attribute:
MO
Level
Attribute name
Description
Range
E///
Default
EUtranCellFDD
/EUtranCellTDD
ul64qamEnabled
Enables UL 64-QAM at cell level.
N/A
true
Dependencies:
Only relevant if the license for UL 64-QAM
is present and the
feature is active.
Disturbances: Changes may affect traffic.
Takes effect: Immediately
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 12
Configuration
management cont.
› New MO Attribute:
MO
Level
Attribute name
Description
EUtranCellFDD
/EUtranCellTDD
puschPwrOffset64Qam Power offset to the target received PUSCH 0..8
Power Spectral Density (PSD) for 64-QAMcapable UEs. Used to control the received
SINR target.
It is used to enable maximum throughput for
64QAM, which in some configurations is not
possible otherwise, see dependencies.
Dependencies:
Only relevant if the license for 64-QAM
Uplink is present and the
feature is active.
For 2Rx, pZeroNominalPusch +
puschPwrOffset64qam needs to be -100
dBm or higher to achieve maximum
throughput.
Unit: 1 dB
Disturbances: Changes may affect traffic.
Takes effect: Immediately
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 13
Range
E///
Default
0
Performance
management
MO
Level
Counter name
Description
EUtranCellFDD/ pmMacHarqUlSucc64qam The total number of successful HARQ transmissions in the
uplink direction using a 64QAM modulation.
EUtranCellTDD
EUtranCellFDD/ pmMacHarqUlFail64qam
EUtranCellTDD
EUtranCellFDD/ pmMacHarqUlDtx64qam
EUtranCellTDD
Existing/
New/
Modified
New
Condition: To decide if it was successful is based on the CRC
check, not based on if RBS sends HARQ ACK (RBS can use
the ACK even if the transport block was not successfully
decoded in a way to control the HARQ).
Counter type: ACC
The total number of unsuccessful HARQ transmissions in the New
uplink direction using a 64QAM modulation.
Condition: To decide if it was failed is based on the CRC check
for received transport blocks (which results in NACK).
Counter type: ACC
The total number of occasions when an uplink grant was
New
meant for HARQ transmission of a transport block using
64QAM modulation in the uplink direction, where DTX is
considered the reason for no reception of HARQ in uplink in
the eNB.
Condition: To decide if it was DTX is based on not receiving a
granted uplink transmission using 64QAM modulation.
Counter type: ACC
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 14
Performance
management
MO
Level
Counter name
EUtranCellFDD/ pmSinrPuschDistr
EUtranCellTDD
Description
Distribution of the SINR values calculated for PUSCH.
PDF ranges:
[0]: SINR <= -5
[1]: -5 < SINR <= -2
[2]: -2 < SINR <= 2
[3]: 2 < SINR <= 6
[4]: 6 < SINR <= 10
[5]: 10 < SINR <= 14
[6]: 14 < SINR <= 17
[7]: 17 < SINR <= 20
[8]: 20 < SINR
Unit: 1 dB
Counter type: PDF
EUtranCellFDD/ pmSinrPuschSectorCarrier Distribution of the SINR values calculated for PUSCH.
PDF ranges:
EUtranCellTDD Distr
[0]: SINR <= -5
[1]: -5 < SINR <= -2
[2]: -2 < SINR <= 2
[3]: 2 < SINR <= 6
[4]: 6 < SINR <= 10
[5]: 10 < SINR <= 14
[6]: 14 < SINR <= 17
[7]: 17 < SINR <= 20
[8]: 20 < SINR
Unit: 1 dB
Counter type: PDF
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 15
Existing/New/
Modified
Modified in L16A
by adding range
SINR>20
Modified in L16A
by adding range
SINR>20
Performance
management
MO
Level
Counter name
Description
EUtranCellFD pmUeCategoryDlUlCo Distribution of supported combinations for UE capability
parameters ue-CategoryUL and ue-CategoryDL for
D/EUtranCell mbDistr
established UE contexts, according to 3GPP TS 36.306
TDD
Table 4.1A-6.
PDF ranges:
[0]: ueCategoryDL = 0 and ueCategoryUL = 0
[1]: ueCategoryDL = 6 and ueCategoryUL = 5
[2]: ueCategoryDL = 7 and ueCategoryUL = 13
[3]: ueCategoryDL = 9 and ueCategoryUL = 5
[4]: ueCategoryDL = 10 and ueCategoryUL = 13
[5]: ueCategoryDL = 11 and ueCategoryUL = 5
[6]: ueCategoryDL = 12 and ueCategoryUL = 13
[7]: ueCategoryDL = 13 and ueCategoryUL = 3
[8]: ueCategoryDL = 13 and ueCategoryUL = 5
[9]: ueCategoryDL = 13 and ueCategoryUL = 7
[10]: ueCategoryDL = 13 and ueCategoryUL = 13
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 16
Existing/New/
Modified
New
network impact
analysis
› In good Radio conditions, UL Throughput will be higher
when UL 64QAM is enabled and a 64QAM capable UE is
scheduled.
› UE throughput will be improved for applicable UEs.
› Average cell throughput increase is expected.
› 64QAM capable UEs will generate more interference within the
cell and towards neighboring cells. The throughput of UEs
without 64QAM capability will be impacted.
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 17
references
› CPI:
– User Description
›
›
›
›
›
›
3GPP TS 36.211 v12.5.0 for 64 QAM Modulation mapping
3GPP TS 36.212 v12.4.0 for Multiplexing and channel coding
3GPP TS 36.213 v12.5.0 for Modulation order determination in PUSCH
3GPP TS 36.331 v12.5.0 for capability signaling
3GPP TS 36.306 v12.4.0 for UE category definitions
3GPP TS 36.104 v12.7.0 for eNB transmission and reception
Feature Presentation 64-QAM Uplink | Ericsson Internal | 4/1570-300/FCP 131 4742 Uen, Rev PA8 | 2015-06-15 | Page 18