ZGO-04-02-002 Dynamic MS Power Control Feature Guide ZXG10-iBSC (V12.2.0)20130410_548234
Transcript of ZGO-04-02-002 Dynamic MS Power Control Feature Guide ZXG10-iBSC (V12.2.0)20130410_548234
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ZGO-04-02-002 Dynamic MS
Power ControlFeature Guide
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ZGO-04-02-002 Dynamic MS Power Control
ZTE Confidential Proprietary 1
ZGO-04-02-002 Dynamic MS Power Control Version Date Author Reviewer Notes
V1.0 2013/04/01 Tian Kang
GU Commercial
System Supporting
Dept.
Not open to the third party
© 2013 ZTE Corporation. All rights reserved.
ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used
without the prior written permission of ZTE.
Due to update and improvement of ZTE products and technologies, information in this document is subjected to
change without notice.
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TABLE OF CONTENTS
1
Feature Attribute ............................................................................................... 6
2
Overview ............................................................................................................ 6
2.1
Feature Introduction ............................................................................................. 6
2.2
License Control .................................................................................................... 7
2.3 Correlation with Other Features ........................................................................... 7
3 Technical Description ....................................................................................... 7
4
Parameters and Configurations ....................................................................... 9
4.1
Parameter List ..................................................................................................... 9
4.2
Parameter Configuration .................................................................................... 10
4.2.1
Uplink level Sample count .................................................................................. 10
4.2.2
Uplink level Weight ............................................................................................ 10
4.2.3
Uplink quality Sample count ............................................................................... 11
4.2.4
Uplink quality Weight ......................................................................................... 11
4.2.5
Uplink power control allowed ............................................................................. 12
4.2.6
Increase uplink level Threshold .......................................................................... 12
4.2.7
Decrease uplink level Threshold ........................................................................ 13
4.2.8
Increase uplink quality Threshold ....................................................................... 13
4.2.9
Decrease uplink quality Threshold ..................................................................... 14
4.2.10
Increase uplink level Value P ............................................................................. 14
4.2.11
Increase uplink level Value N ............................................................................. 15
4.2.12
Decrease uplink level Value P............................................................................ 16
4.2.13
Decrease uplink level Value N ........................................................................... 16
4.2.14
Increase uplink quality Value P .......................................................................... 17
4.2.15
Increase uplink quality Value N .......................................................................... 17
4.2.16
Decrease uplink quality Value P ......................................................................... 18
4.2.17 Decrease uplink quality Value N ........................................................................ 19
4.2.18
MAX power level of MS ...................................................................................... 19
4.2.19
MIN power level of MS ....................................................................................... 20
4.2.20
Uplink rapid power control .................................................................................. 21
4.2.21 MIN interval of power control.............................................................................. 22
4.2.22
Power control PwrDecrLimit ............................................................................... 22
4.2.23
Report period of measurement for power control ............................................... 23
5
Related Counters and Alarms ........................................................................ 23
5.1
Related Counters ............................................................................................... 23
5.2
Related Alarms .................................................................................................. 24
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6
Engineering Guide .......................................................................................... 24
6.1
Application Scenario .......................................................................................... 24
6.2
Configuration Description ................................................................................... 24
6.3
Feature Validation .............................................................................................. 26
6.3.1
UL Power Control ---bad quality ......................................................................... 26
6.3.2
UL Power Control ---low level ............................................................................ 27
6.4
Feature Turn off ................................................................................................. 28
6.5
Network Impact .................................................................................................. 28
7
Abbreviation .................................................................................................... 28
8 Reference Document ....................................................................................... 28
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FIGURES
Figure 6-1 Configuration Interface ......................................................................................25
TABLES
Table 4-1 Parameter List ....................................................................................................... 9
Table 4-2 Uplink level Sample count ....................................................................................10
Table 4-3 Uplink level Weight ...............................................................................................10
Table 4-4 Uplink quality Sample count .................................................................................11
Table 4-5 Uplink quality Weight ............................................................................................11
Table 4-6 Uplink power control allowed ................................................................................12
Table 4-7 Increase uplink level Threshold ............................................................................12
Table 4-8 Decrease uplink level Threshold ...........................................................................13
Table 4-9 Increase uplink quality Threshold .........................................................................13
Table 4-10 Decrease uplink quality Threshold ......................................................................14
Table 4-11 Increase uplink level Value P ..............................................................................14
Table 4-12 Increase uplink level Value N..............................................................................15
Table 4-13 Decrease uplink level Value P ............................................................................16
Table 4-14 Decrease uplink level Value N ............................................................................16
Table 4-15 Increase uplink quality Value P ...........................................................................17
Table 4-16 Increase uplink quality Value N ...........................................................................17
Table 4-17 Decrease uplink quality Value P .........................................................................18
Table 4-18 Decrease uplink quality Value N .........................................................................19
Table 4-19 MAX power level of MS ......................................................................................19
Table 4-20 MIN power level of MS........................................................................................20
Table 4-21 Uplink rapid power control ..................................................................................21
Table 4-22 MIN interval of power control ..............................................................................22
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Table 4-23 Power control PwrDecrLimit ...............................................................................22
Table 4-24 Report period of measurement for power control ................................................23
Table 5-1 Counters list .........................................................................................................23
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ZGO-04-02-002 Dynamic MS Power Control
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1 Feature Attribute
BSC Version: [ZXG10-iBSC GSM (V6.30.102)]
BTS Version: [Suits for all SDR versions]
Property: [Optional]
Related Network Element:
NE Name Related or Not Special Requirements
MS √
BTS √
BSC √
MSC -
MGW -
SGSN -
GGSN -
HLR -
Dependent Function: [None]
Exclusive Function: [None]
Note: [None]
2 Overview
2.1 Feature Introduction
Radio frequency power control is to change the transmission power of MS or BTS, or
both of them by radio means within a certain range, aiming at optimizing the transmission
power of MS and BTS without affecting wireless transmission quality. It improves
spectrum efficiency, reduces the average transmission power of MS and BTS and
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alleviates the interferences on other channels. In mobile system, interference alleviation
means to enhance the spectrum efficiency.
The uplink dynamic power control means that the radio frequency power control is
performed on MS. The purpose of MS power control is to adjust the output power of MS
and enable BTS to get stable signaling receiving strength, which restricts the
interferences from co-channel subscribers, reduces MS power consumption and
prolongs the mean up time of MS.
2.2 License Control
None license control for this feature in UR12 Release.
2.3 Correlation with Other Features
The uplink level’s expectation lower limit of MS power control should be set less than the
handover threshold that uplink level triggers; the uplink level’s expectation upper limit of
MS power control should be set less than the handover threshold that uplink quality
triggers. If increasing MS transmission power is able to improve uplink level and quality,
no handover is needed.
For algorithm of power control, please refer to ZGO-04-02-001 Dynamic BTS Power
Control .
3 Technical Description
Power control is an important method for radio link control. The dynamic MS power
control allows MS to conduct dynamic control over the output power of MS. In ZTE
system, dynamic power control is performed by BTS. The transmission power of MS is
adjusted according to an overall judgment based on the expectation, uplink level and
quality and the required transmission power calculated by maximum transmission power
of MS.
Power control should stick to the following basic principles:
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Power will be decreased appropriately when the level or quality is higher than the
expectation.
Power will be increased appropriately when the level or quality is lower than the
expectation.
Both level and quality factors should be taken into overall consideration to make
power control more accurate and effective.
MS power control consists of two phases.
At the beginning, that is, when MS and BTS start connection, BSC selects an initial
transmission power for MS and BTS. When MS is connected to the network through a
random access channel, its transmission power is the permissible maximum
transmission power obtained in the system message broadcast on the BCCH channel of
the cell where it resides. This fixed value, according to the system specifications, is also
the power level of the first message sent out by MS on the dedicated channel. The MS
power is not controlled by the system until the power control command carried in the
SACCH message block is received, indicating the start of the second phase of MS power
control, namely the regular MS power control.
In the regular MS power control phase, BTS, after receiving a certain number of uplink
measurement reports, processes the measurement data to obtain the actual uplink
reception level and quality and makes a comparison with the preset thresholds. Then the
power level to which MS should be adjusted can be calculated. BTS sends to MS a
command of changing MS power through the layer 1 header carried in each downlink
SACCH message block. MS extracts power control information from the downlink
SACCH and uses the transmission power specified in this information as its output power,
and sets the power level in current use in the layer 1 header of the uplink SACCH and
sends it together with the measurement report to BSS. If the MS power level is unable to
output the specified power value, it will output the power that is supported by MS and
closest to the specified value.
During handover, MS uses the maximum transmission power adopted in the target cell.
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4 Parameters and Configurations
4.1 Parameter List
Table 4-1 Parameter List
SN Name Figure
1 Uplink level Sample count Figure 6-1
2 Uplink level Weight Figure 6-1
3 Uplink quality Sample count Figure 6-1
4 Uplink quality Weight Figure 6-1
5 Uplink power control allowed Figure 6-1
6 Increase uplink level Threshold Figure 6-1
7 Decrease uplink level Threshold Figure 6-1
8 Increase uplink quality Threshold Figure 6-1
9 Decrease uplink quality Threshold Figure 6-1
10 Increase uplink level Value P Figure 6-1
11 Increase uplink level Value N Figure 6-1
12 Decrease uplink level Value P Figure 6-1
13 Decrease uplink level Value N Figure 6-1
14 Increase uplink quality Value P Figure 6-1
15 Increase uplink quality Value N Figure 6-1
16 Decrease uplink quality Value P Figure 6-1
17 Decrease uplink quality Value N Figure 6-1
18 MAX power level of MS Figure 6-1
19 MIN power level of MS Figure 6-1
20 Uplink rapid power control Figure 6-1
21 MIN interval of power control Figure 6-1
22 Power control PwrDecrLimit Figure 6-1
23 Report period of measurement for power control Figure 6-1
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4.2 Parameter Configuration
4.2.1 Uplink level Sample count
Table 4-2 Uplink level Sample count
Full name Uplink level Sample count
Abbreviation pcUlLevWindow
Description
The parameter PcUlLevWindow represents the window size
(that is, the number of sample values) used to calculate theaverage value of uplink signal strength.
Managed object Power Control
Value range 1..31
Unit None
Default value 6
4.2.2 Uplink level Weight
Table 4-3 Uplink level Weight
Full name Uplink level Weight
Abbreviation pcUlLevWindow
Description
The parameter PcUlLevWindow represents the window size
(that is, the number of sample values) used to calculate the
average value of uplink signal strength.
Managed object Power Control
Value range 1..31
Unit None
Default value 6
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4.2.3 Uplink quality Sample count
Table 4-4 Uplink quality Sample count
Full name Uplink quality Sample count
Abbreviation pcUlQualWindow
Description
The parameter PcUlLevWindow represents the window size
(that is, the number of sample values) used to calculate the
average value of uplink signal strength.
Managed object Power Control
Value range 1..31
Unit None
Default value 6
4.2.4 Uplink quality Weight
Table 4-5 Uplink quality Weight
Full name Uplink quality Weight
Abbreviation pcUlQualWeight
Description
This parameter determines the weight for the first type of
measurement data when averaging uplink signal quality for
power control.
Weight for the second type of measurement data is set to 1 by
default.
Managed object Power Control
Value range 1..3
Unit None
Default value 2
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4.2.5 Uplink power control allowed
Table 4-6 Uplink power control allowed
Full name Uplink power control allowed
Abbreviation pwrControlUl
Description
According to different demands from the network, object for the
power control can be chosen. If the MS transmission power
needs to be adjusted dynamically, enable this parameter Uplink
Power Control.
Managed object Power Control
Value range0: Off
1: On
Unit None
Default value 1
4.2.6 Increase uplink level Threshold
Table 4-7 Increase uplink level Threshold
Full name Increase uplink level Threshold
Abbreviation pcUlInclLevThs
Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving strength is one of the factors that may lead to MS
power increased in the uplink direction. If P out of N recentuplink signal strength averages are lower than the related
thresholds, the uplink transmission power of MS should be
increased, because the strength of uplink signals is too weak.
Managed object Power Control
Value range 0..63
Unit None
Default value [22,22,22,22,22,22,22]
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4.2.7 Decrease uplink level Threshold
Table 4-8 Decrease uplink level Threshold
Full name Decrease uplink level Threshold
Abbreviation pcUlRedLevThs
Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving strength is one of the factors that may lead to MS
power decreased in the uplink direction. The judge process is
as follows: If P out of N recent uplink signal strength averages
are higher than the related thresholds,the uplink transmission
power of MS should be decreased, because the strength of
uplink signals is too strong.
Managed object Power Control
Value range 0..63
Unit None
Default value [30,30,30,30,30,30,30]
4.2.8 Increase uplink quality Threshold
Table 4-9 Increase uplink quality Threshold
Full name Increase uplink quality Threshold
Abbreviation pcUlInclQualThs
Description
This parameter falls into the follwoing seven types: FR, HR, AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving quality is one of the factors that may lead to MS
power increased in the uplink direction. The judge process is as
follows: If P out of N recent uplink signal strength averages are
higher than the related thresholds,the uplink transmission
power of MS should be increased, because the strength of
uplink signals is too weak.
Managed object Power Control
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Value range 0..7
Unit None
Default value [2,2,2,2,2,2,2]
4.2.9 Decrease uplink quality Threshold
Table 4-10 Decrease uplink quality Threshold
Full name Decrease uplink quality Threshold
Abbreviation pcUlRedQualThs
Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving quality is one of the factors that may lead to MS
power decreased in the uplink direction. The judge process is
as follows: If P out of N recent uplink signal quality averages
are lower than the related thresholds, the uplink transmission
power of MS should be decreased, because the quality of
uplink signals is too good.
Managed object Power Control
Value range 0..7
Unit None
Default value [0,0,0,0,0,0,0]
4.2.10 Increase uplink level Value P
Table 4-11 Increase uplink level Value P
Full name Increase uplink level Value P
Abbreviation pcUlInclLevP
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Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving strength is one of the factors that may lead to MS
power increased in the uplink direction. If P out of N recent
uplink signal strength averages are lower than the related
thresholds, the uplink transmission power of MS should be
increased, because the strength of uplink signals is too weak.
Managed object Power Control
Value range 1..31
Unit None
Default value [3,3,3,3,3,3,3]
4.2.11 Increase uplink level Value N
Table 4-12 Increase uplink level Value N
Full name Increase uplink level Value N
Abbreviation pcUlInclLevN
Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving strength is one of the factors that may lead to MS
power increased in the uplink direction. If P out of N recent
uplink signal strength averages are lower than the related
thresholds, the uplink transmission power of MS should be
increased, because the strength of uplink signals is too weak.
Managed object Power Control
Value range 1..31
Unit None
Default value [4,4,4,4,4,4,4]
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4.2.12 Decrease uplink level Value P
Table 4-13 Decrease uplink level Value P
Full name Decrease uplink level Value P
Abbreviation pcUlRedLevP
Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving strength is one of the factors that may lead to MS
power decreased in the uplink direction. The judge process is
as follows: If P out of N recent uplink signal strength averages
are higher than the related thresholds,the uplink transmission
power of MS should be decreased, because the strength of
uplink signals is too strong.
Managed object Power Control
Value range 1..31
Unit None
Default value [3,3,3,3,3,3,3]
4.2.13 Decrease uplink level Value N
Table 4-14 Decrease uplink level Value N
Full name Decrease uplink level Value N
Abbreviation pcUlRedLevN
Description
This parameter falls into the follwoing seven types: FR, HR, AFS, AHS, FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving strength is one of the factors that may lead to MS
power decreased in the uplink direction. The judge process is
as follows: If P out of N recent uplink signal strength averages
are higher than the related thresholds, the uplink transmission
power of MS should be decreased, because the strength of
uplink signals is too strong.
Managed object Power Control
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Value range 1..31
Unit None
Default value [4,4,4,4,4,4,4]
4.2.14 Increase uplink quality Value P
Table 4-15 Increase uplink quality Value P
Full name Increase uplink quality Value P
Abbreviation pcUlInclQualP
Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving quality is one of the factors that may lead to MS
power increased in the uplink direction. The judge process is as
follows: If P out of N recent uplink signal strength averages are
higher than the related thresholds, the uplink transmission
power of MS should be increased, because the strength of
uplink signals is too weak.
Managed object Power Control
Value range 1..31
Unit None
Default value [3,3,3,3,3,3,3]
4.2.15 Increase uplink quality Value N
Table 4-16 Increase uplink quality Value N
Full name Increase uplink quality Value N
Abbreviation pcUlInclQualN
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Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving quality is one of the factors that may lead to MS
power increased in the uplink direction. The judge process is as
follows: If P out of N recent uplink signal strength averages are
higher than the related thresholds, the uplink transmission
power of MS should be increased, because the strength of
uplink signals is too weak.
Managed object Power Control
Value range 1..31
Unit None
Default value [4,4,4,4,4,4,4]
4.2.16 Decrease uplink quality Value P
Table 4-17 Decrease uplink quality Value P
Full name Decrease uplink quality Value P
Abbreviation pcUlRedQualP
Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS,
FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving
quality is one of the factors that may lead to MS power
decreased in the
uplink direction. The judge process is as follows: If P out of Nrecent
uplink signal quality averages are lower than the related
thresholds, the
uplink transmission power of MS should be decreased,
because the
quality of uplink signals is too good.
Managed object Power Control
Value range 1..31
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Unit None
Default value [3,3,3,3,3,3,3]
4.2.17 Decrease uplink quality Value N
Table 4-18 Decrease uplink quality Value N
Full name Decrease uplink quality Value N
Abbreviation pcUlRedQualN
Description
This parameter falls into the follwoing seven types: FR, HR,
AFS, AHS, FR-AMR-WB, OFR-AMR-WB, and OHR-AMR-WB.
It can independently control various voice versions. Uplink
receiving quality is one of the factors that may lead to MS
power decreased in the uplink direction. The judge process is
as follows: If P out of N recent uplink signal quality averages
are lower than the related thresholds, the uplink transmission
power of MS should be decreased, because the quality of
uplink signals is too good.
Managed object Power Control
Value range 1..31
Unit None
Default value [4,4,4,4,4,4,4]
4.2.18 MAX power level of MS
Table 4-19 MAX power level of MS
Full name MAX power level of MS
Abbreviation msTxPwrMax
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Description
During the communication between the MS and the BTS, the
transmission power is controlled by the network. The network
sets the power for MS through the power command and the
command is transmitted on SACCH (SACCH has 2 header
bytes, one is the power control byte and the other is the timing
advance byte).
MS must extract the power control header from downward
SACCH and takes the specified transmission power as output
power. If the power level of MS cannot output the power value,
it will output the closest transmission power that can be output.
During BSC power control, this parameter determines the
maximum transmission power available for MS in the cell. BSC
also uses it to calculate PBGT value. The maximum power levelof the MS falls into the following types: FR, HR, AMR FR,and
AMR HR.
Managed object Power Control
Value range 0..31
Unit None
Default value [5,5,5,5,5,5,5]
4.2.19 MIN power level of MS
Table 4-20 MIN power level of MS
Full name MIN power level of MS
Abbreviation msTxPwrMin
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Description
During the communication between the MS and the BTS, the
transmission power is controlled by the network. The network
sets the power for MS through the power command and the
command is transmitted on SACCH (SACCH has 2 header
bytes, one is the power control byte and the other is the timing
advance byte).
The MS must extract the power control header from downward
SACCH and takes the specified transmission power as output
power. If the power level of MS cannot output the power value,
it will output the closest transmission power that can be output.
When BSC is performing power control, this parameter is the
minimal transmission power (that is, lower limit of power
control) that can be used by MS in the cell. The minimum powerlevel of the MS falls into the following four types: FR, HR, AMR
FR, and AMR HR.
Managed object Power Control
Value range 0..31
Unit None
Default value [16,16,16,16,16,16,16]
4.2.20 Uplink rapid power control
Table 4-21 Uplink rapid power control
Full name Uplink rapid power control
Abbreviation ulRapidPcInd
Description
This parameter indicates the availability of the rapid power
control process. The rapid power control process is an optional
process of BSC.
It reduces the interference of the whole BSS radio system and
satisfies the dynamic power control requirement for rapid
moving MS.
The amplitude of power control used by rapid power control
process each time is no longer a fixed value, but an integer
multiple of cell parameter power control step (increase and
decrease).
Managed object Power Control
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Value range 0..1
Unit None
Default value 0
4.2.21 MIN interval of power control
Table 4-22 MIN interval of power control
Full name MIN interval of power control
Abbreviation pcMinInterval
Description
This parameter indicates the minimum interval of power control.
Usually,
MS still sends two measurement reports with the original power
to BSC after enabling the power control. Signal level
information contained in the reports is inaccurate and can be
ignored (information such as adjacent cell information is still
valid). Thus a minimum interval of power control is needed and
signal level information during the interval can be ignored.
Managed object Power Control
Value range 1..32
Unit None
Default value [2,2,2,2,2,2,2]
4.2.22 Power control PwrDecrLimit
Table 4-23 Power control PwrDecrLimit
Full name Power control PwrDecrLimit
Abbreviation pwrDecrLimit
Description
This parameter is set for preventing MS from call drop due to
fast power control. It corresponds to different quality levels. For
example, PwrDecrLimit [0] determines the maximum power
decrease limit for calls with receiving quality level 0 (Bit Error
rate (BER) <0.2%). This parameter is valid for both uplink and
downlink.
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Managed object Power Control
Value range 0..38
Unit NoneDefault value [24,22,20,18,16,14,12,10]
4.2.23 Report period of measurement for power control
Table 4-24 Report period of measurement for power control
Full name Report period of measurement for power control
Abbreviation pwrCtrlReportPrd
Description
Power control is performed at BTS side and BSC implements
relevant performance statistics. BTS uses this parameter to
decide the periodicity to send the preprocessed power
measurement to BSC as an input for power control analysis.
This parameter is in the unit of SACCH multiframe.
Managed object Power Control
Value range 1..254
Unit None
Default value 240
5 Related Counters and Alarms
5.1 Related Counters
Table 5-1 Counters list
Counter ID Name
C901320001 Number of normal increases of MS power due to uplink signal level(Times)
C901320002 Number of rapid increase in MS power due to uplink signal level(Times)
C901320003 Number of normal decrease of MS power due to uplink signal level(Times)
C901320004 Number of rapid decrease in MS power due to uplink signal level(Times)
C901320009 Number of normal increases of MS power due to uplink signal quality(Times)
C901320010 Number of rapid increase in MS power due to uplink signal quality(Times)
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C901320011 Number of normal decrease of MS power due to uplink signal quality(Times)
C901320012 Number of rapid decrease in MS power due to uplink signal quality(Times)
C901320023 Total value of power scans of uplink signal level(Times)
C901320024 Number of power scans of uplink signal level(Times)
C901320027 Total value of power scans of uplink signal quality(Times)
C901320028 Number of power scans of uplink signal quality(Times)
5.2 Related Alarms
This feature has no related alarms.
6 Engineering Guide
6.1 Application Scenario
This feature suits for all scenarios.
6.2 Configuration Description
In configuration resources tree window, select Configuration Management->Modify
area->Managed Element->GSM Logical Configuration->Cell Information
Configuration->Power Control ->Uplink power control allowed to enable uplink
power control, as shown below. Others are minor adjustment parameters, which can be
adjusted as per the actual conditions.
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Figure 6-1 Configuration Interface
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6.3 Feature Validation
6.3.1 UL Power Control ---bad quality
Test Item UL Power Control ---bad quality
Precondition 1. check CN is healthy;
2. check BSC is healthy;
3. check SDR is healthy;
4. check default cell configuration and parameters in
BSC;
5. MSs are ready;
6. ensure good radio environment;
Test Steps 1. Set “Uplink power control allowed” as “On” in Power
Control interface;
2. Set “Uplink rapid power control” as “1” in Power
Control interface;
3. Set the serving cell with at least two TRXs
4. Make a FR call in serving cell, in time slot 0, hold on;
5. Wait a few minutes to observe the power increasing
when quality is bad
6. Save Abis, A interface signal trace, observe the
measurement result and power control indication in
CS signaling trace;
7. Repeat step 4 to 6 in time slot 58. Repeat 4-7 step with HR/AMR FR/ AMR HR call;
Anticipative Result 1. The signaling “power control indication” can be found
in CS signaling trace and the Radio Link Direction of
Power Control is uplink direction.
2. When UL radio quality is bad, UL power dynamic
increase and the increasing step is 2db as default
value;
Test Result 1. UL power control is effective.
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Parameters Setting Default parameters
6.3.2 UL Power Control ---low levelTest Item UL Power Control ---low level
Precondition 1. check CN is healthy;
2. check BSC is healthy;
3. check SDR is healthy;
4. check default cell configuration and parameters in
BSC;
5. MSs are ready;
6. ensure good radio environment;
Test Steps 1. Set the cell power control params as default value;2. Set “Uplink power control allowed” as “On” in Power
Control interface;
3. Configure the serving cell with at least two TRXs
4. Make a FR call in serving cell, in time slot 0, hold on;
5. Keep MS away from the BTS , wait a few minutes to
observe the power increasing when UL level is low;
6. Save Abis, A interface signal trace, observe the
measurement result and power control indication in
CS signaling trace;
7. Repeat step 4 to 6 in time slot 5
8. Repeat 4-7 step with HR/AMR FR/ AMR HR call;
Anticipative Result 1. The signaling “power control indication” can be found
in CS signaling trace and the Radio Link Direction of
Power Control is uplink direction
2. When UL level is low, UL power dynamic increase and
the increasing step is 2db as default value;
Test Result 1. UL power control is effective.
Parameters Setting Default parameters
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6.4 Feature Turn off
In configuration resources tree window, select Configuration Management->Modify
area->Managed Element->GSM Logical Configuration->Cell Information
Configuration->Power Control ->Uplink power control allowed to close uplink
power control
6.5 Network Impact
Activation of dynamic MS power control can reduce MS transmission power with
stable uplink signal strength, aiming at decreasing intra-network co-channel and
adjacent-frequency interference, lowering MS power consumption and prolonging
the mean up time of MS
7 AbbreviationAbbreviations Full Characteristics
3GPP 3rd
Generation Partnership Project
BSC Base Station Controller
BTS Base Transceiver Station
MR Measure Report
SACCH Slow Associated Control Channel
8 Reference Document
ZXG10 iBSC (V6.30.10) Base Station Controller Performance Counter Reference
ZXG10 iBSC (V6.30.10) Base Station Controller Radio Parameter Reference