The power offsets (POs) of pilot domain are independently configured on the DPCCH and can be optimized

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RNC Pilot PO Optimization

2. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 2
Performance Summary
• Accessibility improved due to DL power congestion reduction
• Retainability maintained.
• TCP non HS power decrease around 11.54% even R99 payload increase around 3%
• Number of DL power rejection decreased 94%, number of LDR action due to DL power decreased 80%
• ISHO & SHO keep maintain, while IFHO performance improved after pilot PO optimization
• HSDPA & PS throughput keep maintain
• Traffic & payload keep maintain
 Script:
Activate:
SET UCORRMALGOSWITCH:PCSWITCH=PC_PILOT_PO_OPTI_SWITCH-1;
Fall Back:
SET UCORRMALGOSWITCH:PCSWITCH=PC_PILOT_PO_OPTI_SWITCH-0;

3. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 3
Pilot PO Optimization
Technical principles:
 The DL dedicated physical channel (DL DPCH) is divided into the dedicated physical data channel (DPDCH) and the dedicated physical
control channel (DPCCH).
 The power offsets (POs) of pilot domain are independently configured on the DPCCH and can be optimized.
 The default transmit power of the current DL DPCH pilot domain is set to 3 dB based on the transmit power of the data domain.
 For a low-rate DL DPCH, such value is a bit high. Especially when no data is transmitted on the DL DPCH of HSDPA UEs, a high Pilot PO
will result in transmit power waste.
 We can optimized to 1db to reduce the power consumption;
 Script:
Activate
SET UFRC: PilotPo=4;
Fall Back:
SET UFRC: PilotPo=12;
Data1
TPC TFCI
Data2
Pilot
Timeslot (0.667 ms)
PO1PO2 PO3
DL DPCH structure:
DPCCH
DPDCH

4. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 4
Accessibility
Accessibility performance slightly improved after pilot PO optimization activation

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Retainability
Retainability performance keep maintain after pilot PO optimization activation

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Mobility
 SHO & ISHO keep maintain
 IFHO performance improved after activation pilot
PO optimization

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Throughput
 PS Throughput keep maintain
 HSDPA & HSUPA throughput keep maintain after
Pilot PO optimization activation

8. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 8
Traffic & Payload
 CS traffic keep maintain
 PS & HS payload keep maintain

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Accessibility & Retainability Performance
Accessibility performance improved while retainability performance keep maintain

10. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 10
Mean TCP non HS vs PS Payload
 Mean TCP non HS power
decrease around 11.54 % with PS
payload increment around 3%
(Comparing 3 days before and 3
days after)+ 3% + 2% + 5%
+ 12.25% + 12.21%
+ 10.16% + 11.54%

11. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 11
Number of LDR Action due to DL Power & DL Power Congestion
~80%
Less
~94%
Less
• 59% less LDR action due
to DL power congestion
• It shown number of
occurrence DL power
reach LDR threshold
become less after DPCH
Pilot power adjustment
* Data before: 15,16,17 Aug 2014,
After: 22 ,23,24 Aug 2014
 94% DL power rejection
less than before
activation DPCH pilot
power adjustment.
* Data before: 15,16,17 Aug 2014,
After: 22,23,24 Aug 2014

12. HUAWEI TECHNOLOGIES CO., LTD. Huawei Confidential Page 12
Throughput & Payload Comparison
~97%
Less
 HSDPA payload increased
1.3 % (3 days before
compare with 3 days
after)
 HSDPA throughput &
HSDPA payload shown
improvement on August
22nd, 2014
- 4%
+ 7%
+1.7%

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The information contained in this document is for reference purpose only, and is subject to
change or withdrawal according to specific customer requirements and conditions.