85171230 trx-path-balance-check-v1-00
TRANSCRIPT
TRX Path-Balance Check Confidentiality:
Document
NameTRX Path-Balance Check SOP Guideline V1.00
Version V1.00 Effective Date 2010-07-31
Document
CodeL1
Based eTOM
Prepared By L2Based eTOM
Reviewed By L3Based eTOM
Approved By L4Based eTOM
Applicability Global Standard
RolesAnalysis engineer
Relevant Process/Regulation
Document Name Document Code
2023-04-15 Huawei Confidential Page 1 of 10
TRX Path-Balance Check Confidentiality:
Contents
Relevant Process/Regulation.....................................................................................................1
1 Abstract.........................................................................................................................3
2 Purpose..........................................................................................................................3
Operating Instructions.........................................................................................................4
2.1 Link Balance Equations:.........................................................................................4
2.2 Counters used for path-balance Judgment..............................................................4
2.3 Judgment Criteria...................................................................................................5
2.4 Normal Trend for Path-Balance..............................................................................6
2.5 Weak DL Trend for Path-Balance............................................................................7
2.6 Weak UL Trend for Path-Balance............................................................................8
2.7 Misleading Case for Path-Balance..........................................................................9
3 Appendix......................................................................................................................10
4 Support Document(s)...................................................................................................10
5 Related Document(s)...................................................................................................10
6 Record Retention.........................................................................................................10
7 Document Preparation/Modification Record...............................................................10
2023-04-15 Huawei Confidential Page 2 of 10
TRX Path-Balance Check Confidentiality:
1 Abstract
This document instructs engineers how to perform the Base Band Hopping audit.
2 Purpose
This document aims to standardize the operation procedure of Path-Balance Judgment
1. Link balance Equations2. Counters used for path-balance Judgment3. Judgment Criteria4. Normal Balance Trend5. Weak UL Trend6. Weak DL Trend7. Misleading Case
2023-04-15 Huawei Confidential Page 3 of 10
TRX Path-Balance Check Confidentiality:
Operating Instructions
2.1 Link Balance Equations:
UL/DL Path balance difference = UL path loss - DL path loss = (MS real transmit power-UL Rx_Lev) - (BTS cabinet output power-DL Rx_Lev).
BTS cabinet output power=TRX power-static power class*2 + Power fine tuning - Combiner loss - DL dynamic PC level*2 + dynamic PBT gain
2.2 Counters used for path-balance Judgment
The below counters define the balance status of the TRX into 11 levels and the balance should be around level 6
The levels below level 6 indicates the status of the UL The levels above level 6 indicates the status of the DL Level 1 Indicates that the UL > DL by 15 Level 1 Indicates that the DL > UL by 15
2023-04-15 Huawei Confidential Page 4 of 10
TRX Path-Balance Check Confidentiality:
BSC 6900 TRX Level Balance CountersUL/DL Path-balance
Diffrence
Commen
t
S462A:Number of MRs (Uplink-and-Downlink Balance Level = 1)
(none) X <= -15 UL > DL
S462B:Number of MRs (Uplink-and-Downlink Balance Level = 2)
(none) -14 < x < -11 UL > DL
S462C:Number of MRs (Uplink-and-Downlink Balance Level = 3)
(none) -10 < x < -8 UL > DL
S462D:Number of MRs (Uplink-and-Downlink Balance Level = 4)
(none) -7 < x < -5 UL > DL
S462E:Number of MRs (Uplink-and-Downlink Balance Level = 5)
(none) -4 < x < -2 UL > DL
S462F:Number of MRs (Uplink-and-Downlink Balance Level = 6)
(none) -1 < x < 1 Balance
S462G:Number of MRs (Uplink-and-Downlink Balance Level = 7)
(none) 2 < x < 4 DL > UL
S462H:Number of MRs (Uplink-and-Downlink Balance Level = 8)
(none) 5 < x < 7 DL > UL
S462I:Number of MRs (Uplink-and-Downlink Balance Level = 9)
(none) 8 < x < 10 DL > UL
S462J:Number of MRs (Uplink-and-Downlink Balance Level = 10)
(none) 11 < x < 14 DL > UL
S462K:Number of MRs (Uplink-and-Downlink Balance Level = 11)
(none) X => 15 DL > UL
2023-04-15 Huawei Confidential Page 5 of 10
TRX Path-Balance Check Confidentiality:
2.3 Judgment Criteria
The criteria used to judge if the TRX is Balance or not is as following:
1- `Shape of the graph should be centered on Level 62- Sum of Levels (1 + 2) should be Less Than 20 % from the total value of Levels 1 to 11 (around the 20
%)3- Sum of Levels (10 + 11) should be Less Than 25 % from the total value of Levels 1 to 11 (around the
25 %)
2.4 Normal Trend for Path-Balance
The Normal Trend of the balance means that the measurement should be around level 6 as shown below
2023-04-15 Huawei Confidential Page 6 of 10
TRX Path-Balance Check Confidentiality:
2.5 Weak DL Trend for Path-Balance
Weak DL means that the measurement of the UL Level counters is higher than the DL counters (Levels 1+2 is Higher than 20 % from the total Measurement)
2023-04-15 Huawei Confidential Page 7 of 10
TRX Path-Balance Check Confidentiality:
2.6 Weak UL Trend for Path-Balance
Weak DL means that the measurement of the DL Level counters is higher than the UL counters (Levels 10+11 is Higher than 25 % from the total Measurement)
2023-04-15 Huawei Confidential Page 8 of 10
TRX Path-Balance Check Confidentiality:
2.7 Misleading Case for Path-Balance
In the below case the measurement of Levels 10+11 is 22% which is good and accepted but from the TRX chart we can see that the TRX suffers from Weak-UL status as shown below
So the conclusion from this case is that:
1- Percentage is just an indication to determine the worst cases2- The judgment must be done for case by case specially for the TRXs with percentage around 20% for
both UL/DL indicators (Levels 1+2 or Level 10+11)
2023-04-15 Huawei Confidential Page 9 of 10
TRX Path-Balance Check Confidentiality:
3 Appendix
Not Required
4 Support Document(s)
No. Document name Document code
1.
5 Related Document(s)
Front-end and Back-end Document name Document Code
6 Record Retention
Record
Name
Hand over
Owner
Retention
Owner
Retention
Location
Filing Date Retention
Period
Disposition at
Expiry
Problem
escalation
(GCRMS)
7 Document Preparation/Modification Record
(Manda tory)
Versio
n
Prepared/Modified
By
Preparation/Modification
DateContent/Reason for Modification
Approved
By
V1.00 Mostafa Ibrahim
701891
(Egypt 3rd licence)
2010.8.31 New Version Zhu
yongsheng
108866
2023-04-15 Huawei Confidential Page 10 of 10