hua we i unique parameters for s
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Min interval for TCH HOs Min interval for SD HOs
Range: 160 Range: 160
Unit Second Unit Second
Default: 2 Default: 2
Description: When a new TCH is a Description: When a new SDCCH i
this timer times out will handov when this timer times out will
duration for this timer. This pa is the duration for this timer.
handover due to inaccurate MRs a incorrect handover due to inacc
establishment. The value of this establishment. The value of thi
pre-processed by BTS should be s pre-processed by BTS should be smaller than that when MR is not
pre-processed by BTS. pre-processed by BTS.
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Min interval for consecutive HOs Min interval for Emerg. HOs
Range: 160 Range: 160
Unit Second Unit Second
Default: 4 Default: 4
Description: This parameter is used to prevDescription: When BSC completes or f
result in bad network performance. After BSwill start a timer. BSC will not per
command, it will start a timer. BSC will no before this timer times out. This parameter is the durat
before this timer times out. This parameter timer.
timer.
pre-processed by BTS should be smaller than that when MR is not
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Co-BSC/MSC Adj Penalty allowed MS power prediction after HO
Range: Yes, No Range: Yes, No Range: Yes, No
Unit - Unit - Unit -
Default: No Default: Yes Default: No
Description: Indica Description: Indicat Description: Indicates whether MS is a
in the same BSC/MSC including the target the maximum power to access new channe
before this timer times out. This parameter is the duratthat has emergency h parameter is set to Yes, this can r
bad quality. improve service quality.
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MR. Pre-process Transfer original MR. Transfer BS/MS power class
Range: Yes, No Range: Yes, No Range: Yes, No
Unit - Unit - Unit -
Default: No Default: No Default: Yes
Description: Indicat Description: Description: In Description: Indicates whether to t
No, it means that MR after BTS pre-processes MR. BSC. If the parameter is set to "No
parameter Transfer o BTS transfer to BSC not only power class to BSC. This will affec
are invalid. If this original MRs. balance measurement.
of Abis interface si Note: In the case of 15:1 fu Note: When MR Pre-process is enable
response time and ne greater than or equal to 2, downlink balance measurement will
determines the place where to perform power contrpower class is set as No. Besi
parameter is set to Yes, then the power controhandovers as PBGT handover, load ha
by BTS. Otherwise, the power control will be perfhandover are abnormal.
Note: 1, MR Pre-process aims to reduce load of BSC MPU. For versions
before BTS01.1130, MR Pre-process will be enabled unless busy
hour traffic exceeds the theoretic value. For versions after
BTS01.1130 (including BTS01.1130), MR Pre-process is advised to
be enabled if no encryption is used, but not if otherwise.
2, For BTS22C, this parameter must be set as No..
3, BTS2X (including BTS23 and BTS22C) supports G-I power
control instead of G-II power control shift-to BTS.
When setting this parameter, it should be noted that whether BTS
supports power control.
4, In 16 K mode, if some TRX configured 2 or more SDCCH, or
enabled dynamic SDCCH, it is recommended to enable MR.
Pre-process, and the frequency of report configured as 1 time per
second.
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Cell Asynchronism HO Sent Freq. of preprocessed MR. Multi-MNC HO allowed
Range: Yes, No Range: Do not report, Twice every second Range: Yes/No
Unit None Unit - Unit -
Default: No Default: Twice every second Default: N
Description: The synchronouDescription: Indicates the period of BTS Description: Controlling wh
which a fiber repeater is aNote: In the case of 15:1 function, it i N is selected, the multi-MN
for the two cells. This parto Once every second. performed. The handover pro
handover type of synchronous cells. will be the same as that fo
If you select No, the type of handovers in and between synchronous selected, the multi-handove
cells is synchronous. handover control will be pe
If you select Yes, the type of handovers in and between Multi-MNC HO type.
synchronous cells is asynchronous. For the situation where the
to configure this parameter
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Multi-MNC HO type EDGE HO Allowed EDGE HO min time (s) DirectRtryRxLev
Range: Normal handover,Range: Yes, no Range: 360 Range: 063
Unit - Unit: - Unit: s Unit: Level grade
Default: Normal handoveDefault: No Default: 3 Default: 16
Description: When "MultDescription Used to Description Used to determiDescription This par
multi-MNC handover control strategy accordinbegins filter the target ce
Each multi-MNC handover control strategy and its application
occasion are given below.
1, Normal handover
Control strategy: hand over to a cell providing better service
quality (in respect of level, quality, cell class, load and whether
the serving cell shares BSC\MSC).
Application occasion: MS is expected to hand over to a cell
providing better service quality without regard to whether the
destination cell is of the same MNC.
2, Handover to a cell of the same MNC allowed
Control strategy: Only the handover to a cell (including the
serving cell) of the same MNC is allowed.
Application occasion: MS is expected to hand over to a cell of the
same MNC.
3, Handover to a cell of the same MNC first
Control strategy: If the neighboring cell and the serving cell are of
the same MNC, and the receiving level of the neighboring cell is
higher than its Min-DL power on candidate cell, this neighboring
cell will be given priority in handover.
Application occasion: When cells of the same MNC serve
normally, MS is expected to hand over to a cell of the same
MNC. Otherwise (i.e. MS can not detect signals in cells of the
same MNC), MS can hand over to a cell of a different MNC.
4, Handover to a better cell of the same MNC first
Control strategy: If the neighboring cell and the serving cell are of
the same MNC, and the receiving level of the neighboring cell is
higher than its Inter-layer HO threshold, this neighboring cell will
be given priority in handover.
Application occasion: When cells of the same MNC serve
normally, MS is expected to hand over to a cell of the same
MNC. Otherwise, MS can hand over to a cell of a different MNC.
If otherwise, MS may hand over to a cell of a different MNC.
5, Handover to a better cell of a different MNC first
Control strategy: If the neighboring cell and the serving cell are of
different MNCs, and the receiving level of the neighboring cell is
higher than its Inter-cell HO threshold, this neighboring cell will
be given priority in handover.
Application occasion: When cells of different MNCs serve
properly, MS is expected to hand over to a cell of different MNC.
Otherwise, MS may hand over to a cell providing better service.
This control strategy is selected when well-covered cells of the
same MNC are in congestion for lack of channels, and cells of
different MNCs is allowed to share the traffic.
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6, Handover to a cell of a different MNC first
Control strategy: If the neighboring cell and the serving cell are of
different MNCs, and the receiving level of the neighboring cell is
higher than its Min-DL power on candidate cell, this neighboring
cell will be given priority in handover.
Application occasion: When cells of different MNCs serve
properly, MS is expected to hand over to a cell of a different
MNC. Otherwise (i.e. MS can not detect signals in the cell of a
different MNC), MS can hand over to a cell of the same MNC.
This control strategy is selected when well-covered cells of the
same MNC are in congestion for lack of channels, and cells of
different MNCs is allowed to share the traffic.
7, Only handover to a cell of a different MNC allowed
Control strategy: MS can only hand over to a cell of a different
MNC from the serving cell. .
Application occasion: MS is expected to hand over to a cell of
different MNCs.
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Layer of the cell Inter-layer HO Thrsh. Inter-layer HO hysteresis
Range: 14, which are rRange: 063. (-110 dBm-47 Range: 063
Unit Layer Unit dB Unit dB
Default: 3 Default: 25 Default: 3
Description: The whole Description: The threshold f Description: Indicates the hystere
Micro, and Pico. Each lshould satisfy the following used to avoid inter-layer Ping-Pon
the requirements of varEdge HO RX_LEV Thrsh. + Inte Thrsh. of serving cell = value of
Generally, the Macro laNotes: Make sure that the re HO hysteresis. Actual Inter-layer
1800, and Pico layer fohigher than inter-layer HO t value of Inter-layer HO Thrsh. + Inter-layer HO hysteresis.
layer value, the higherhandover. Otherwise, MS hands over from large load high level cell
(high priority cell) to small load low level cell (low priority cell), and
MS is disconnected as a result.
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Penalty on fast moving HO Penalty time on fast moving HO
Range: 063 Range: 0255
Unit dB Unit Second
Default: 30 Default: 40
Description: When MS is moving fasDescription: The duration of penalty giv
to other neighboring cells in othefast moving state.
the penalty level value. This parameter is valid only for the duration
of Penalty Time on Fast Moving HO
value of Inter-layer HO Thrsh. + Inter-layer HO hysteresis.
handover. Otherwise, MS hands over from large load high level cell
(high priority cell) to small load low level cell (low priority cell), and
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UL expected level at HO access MSC shared or not Min access level offset
Range: 063. (-110 dBm-47 dBm) Range: Yes, No. Range: 063
Unit Grade Unit: Unit dB
Default: 35 Default: set based on aDefault: 0
Description: Indicates the expected upli Description: Whether thDescription: This offset is bas
when MS hands over. The value of this pa Note: 1. In the externadifferent neighboring cells, di
consistent with the "Stable RX_LEV Expec 2. The parameter MSC when the receiving level of a n
the power control algorithm and the "UL bit in the 16bit rule. Candidate Cell" + this offset t
conjunction with the HW II power control handover failure.
See the [Cell Description Table].
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Allowed MR number lost Allowed MR number lost Filter length for TCH level
Range: 032 Range: 032 Range: 132
Unit Number of MRs Unit Number of MRs Unit -
Default: 4 Default: 4 Default: 4
Description: Indicates the numDescription: Indicates the numDescription: Indicates the number of
processing. If the number of Mprocessing. If the number of Maveraging calculation. When the filt
value, the last MR received bevalue, the last MR received belarge, the impact of sudden change w
lost MRs will be averaged. Thelost MRs will be averaged. Theresponse speed for this kind of sudd
lost MR. Otherwise, all previolost MR. Otherwise, all previous MRs are discarded, and
calculations are made again whcalculations are made again when new MRs are received.
Note: MRs will lose continuousNote: MRs will lose continuously if the active cell does not serve
well. Once the number of MRs lwell. Once the number of MRs lost continuously is greater than thi
parameter value, all previous parameter value, all previous MRs will be discarded and handover
can not be realized. Thereforecan not be realized. Therefore, it is advised to assign the parame
with a greater value to enablewith a greater value to enable emergency handover.
-
Filter length for TCH Qual. Filter length for SD level
Range: 132 Range: 132
Unit - Unit -
Default: 4 Default: 2
Description: Indicates the number of Description: Indicates the number o
averaging calculation. When the filt strength averaging calculation. The
large, the impact of sudden change w MS is shorter than the TCH occupati
response speed for this kind of sudd parameter should be less than that
See the following table for reference about the relation between
quality class and BER.
Quality class BER
0 Less than 0. 2%
1 0.2% to 0.4%
2 0.4% to 0.8%
3 0.8% to 1.6%
4 1.6% to 3.2%
5 3.2% to 6.4%
6 6.4% to 12.8%
7 Greater than 12.8%
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Filter length for SD Qual Filter length for Ncell RX_LEV
Range: 132 Range: 132
Unit - Unit -
Default: 2 Default: 4
Description: Indicates the number Description: Indicates the number of MRs
averaging calculation. The SDCCH osignal strength averaging calculation. W
than the TCH occupation time, so tto be too large, the impact of sudden change will be reduced, as wel
be less than that of Filter Len as the response speed for this kind of sudden change will be slower.
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Filter length for TA Penalty level after HO fail.
Range: 132 Range: 063
Unit - Unit dB
Default: 4 Default: 30
Description: Indicates the Description: After the handover fails
calculation reasons (i.e. internal handover refuse
to be too large, the impact of sudden change will be reduced, as welinterface handover failure message is
as the response speed for this kind of sudden change will be slower.handover; or Um interface handover fai
internal handover), a penalty will be
avoid retry to hand over to this cell.
signal level to be given. This penalty is valid only during the
duration of Penalty time after HO fail.
-
Penalty level after BQ HO Fail. Penalty time after BQ HO Fail.
Range: 063 Range: 060
Unit dB Unit Second
Default: 63 Default: 15
Description: When the emergency handover tDescription: See the description of Pe
handover fails; in order to avoid handing parameter indicates the duration for pen
Ping-Pong handover, a signal level penalty will be given to this
cell. This parameter is the penalty of signal level to be given. This
penalty is valid only during the duration of Penalty time after BQ
HO Fail.
signal level to be given. This penalty is valid only during the
duration of Penalty time after HO fail.
-
Penalty time after TA HO Fail Penalty time after TA HO Fail.
Range: 063 Range: 060
Unit dB Unit Second
Default: 63 Default: 10
Description: When the emergency handoveDescription: See the description of Pe
and the emergency handover fails; In orparameter indicates the duration for pen
back to this cell and "Ping-Pong" handover, a signal level penalty
will be given to this cell. This parameter is the penalty of signal
level to be given. This penalty is valid only during the duration of
Penalty time after TA HO Fail
-
OL-to-UL HO Failure Penalty Time(s) UL-to-OL HO Failure Penalty Time(s)
Range: 0255 Range: 10255
Unit Second Unit Second
Default: 10 Default: 40
Description: Once an overlaid-to-underlaid subcDescription: Once an underlaid-to-overlaid subc
service handover from the overlaid subcell to tforbids a call service handover from the underl
is not allowed in the defined penalty time. overlaid subcell in the defined penalty time.
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UL-to-OL HO Failure Retry number UL Qual. Thrsh. for interf. HO
Range: 08 Range: 070, corresponding to RQ (quali
Unit Unit -
Default: 3 Default: 50
Description: Upon UL-to-OL subcell handoverDescription: Indicates the uplink receiv
whether the number of handover failure retr emergency handover due to interference.
UL-to-OL HO Failure Retry number. If yes, i or DTX is used, it is recommended to set
subcell handovers. Otherwise, the system wi to 60. When an emergency handover is tri
subcell handover. target cell is other cell. Only when the
Note: If the UL-to-OL HO Failure Retry numbcandidate cell and the Intra-cell HO
restriction on the number of retries upon hintra-cell handover be triggered.
is restriction on the handover failure penalty time.
-
DL Qual. Thrsh. for interf. HO UL RX_LEV Thrsh. for interf. HO
Range: 070, corresponding to RQ (quali Range: 063. (-110 dBm-47 dBm)
Unit - Unit Grade
Default: 50 Default: 15
Description: Indicates the downlink rece Description: Only when the RX_Quality is v
emergency handover due to interference. certain threshold will the system regard t
or DTX is used, it is recommended to set parameter indicates that the threshold for
to 60. When an emergency handover is tri an emergency handover is triggered, the fi
target cell is other cell. Only when the other cell. Only when there is no other ce
candidate cell and the Intra-cell HO and the Intra-cell HO allowed is Yes
intra-cell handover be triggered. triggered.
Note: The follows should be satisfied:
DL Qual. Thrsh.> DL Qual. Thrsh. for interf. HO and UL Qual.
Thrsh.> UL Qual. Thrsh. for interf. HO
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DL RX_LEV Thrsh. for interf. HO Filter parameters A1A8
Range: 063. (-110 dBm-47 dBm) Range: 020
Unit Grade Unit -
Default: 25 Default: 10
Description: Only when the RX_Quality is vDescription: Parameters for leve
certain threshold will the system regard tthe filter parameter B. The actual values of A1 A8 =
parameter indicates the threshold for downThe actual parameter B value = minus value of the B value
emergency handover is triggered, the firstTheir working formula is as follows:
cell. Only when there is no other cell serC1 (nt) = A1 % C(nt) + A2 % C(nt-t) + A3 % C(nt-2t) + + A8 %
the Intra-cell HO allowed is Yes wiC(nt-7t), where:
triggered. C (nt) is the uplink RX_Level of the serving cell in the MR received
at the time of nt.
If C1 (nt)
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Filter parameter B MIN TA System flux Thrsh. for load HO Load HO bandwidth
Range: 0255 Range: 0 Range: 0, 811; its corresponding percenRange: 063
Unit - Unit Bit Unit Flow grade Unit dB
Default: 0 Default: Default: 10 Default: 25
Description: Used for th DescriptiDescription: The load handover occurs on Description: This param
the filter parameter B. The actual values of A1 A8 = subcell tcertain threshold. This parameter indica whether the handover is
The actual parameter B value = minus value of the B valuethresholdof this parameter cannot be too great.-U serving cell is within
Their working formula is as follows: might occur when the system load is verHO RX_LEV Thrsh. + Load
C1 (nt) = A1 % C(nt) + A2 % C(nt-t) + A3 % C(nt-2t) + + A8 % allowed.
C (nt) is the uplink RX_Level of the serving cell in the MR received
If C1 (nt)
-
Load HO step period Load HO step level Edge HO watch time
Range: 160 Range: 160 Range: 116
Unit Second Unit dB Unit: Second
Default: 10 Default: 5 Default: 3
Description: When a cell iDescription: This parame Description: The uplink
sent for all connections sbands. See the descript HO watch time so as to
increase of CPU load and call-drop due to the cong triggered.
target cell. Therefore, these requests will be divided into bands based
on the receiving strength. For example, band1 is within the range
{Edge HO RX_LEV Thrsh., Edge HO RX_LEV Thrsh. + Load HO
step period}; band2 is within the range {Edge HO RX_LEV Thrsh. +
Load HO step period, Edge HO RX_LEV Thrsh. + 2 Load HO step
period}, and so on. Handovers are performed band by band from the
edge to the inner.
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Edge HO valid time PBGT watch time PBGT valid time
Range: 116 Range: 116 Range: 1 16
Unit: Second Unit: Second Unit: Second
Default: 2 Default: 3 Default: 2
Description: To trigger Description: The pat Description: The PBG
downlink should constant with PBGT watch timcells the path los
edge handover thresholds handover is triggere PBGT valid time.
indicates this duration.
-
Intracell TCHF-TCHH handover statistics time
Range: 1 16
Unit: second
Default: 3
Description: According to the P/N rule, system judges wheth
handover based on the RQI of the measurement report. If wit
seconds in N seconds, the RQI is higher than the handover t
from TCHF to TCHH, the handover from TCHF-TCHH is triggered. If
within P seconds in N seconds, the RQI is lower than the handover
threshold from TCHH-TCHF, the handover from TCHH to TCHF is
triggered. Here, the N seconds is the intracell TCHF-TCHH
handover statistics time. P seconds is the intracell TCHF-TCHH
handover observe time.
-
Intracell TCHF-TCHH handover lasting time
Range: 1 16
Unit: second
Default: 2
Description: Within the intracell TCHF-TCHH handover st
time that the RQI is higher than the handover threshold
TCHH or lower than the handover threshold from TCHH to TCHF.
from TCHF to TCHH, the handover from TCHF-TCHH is triggered. If
within P seconds in N seconds, the RQI is lower than the handover
threshold from TCHH-TCHF, the handover from TCHH to TCHF is
triggered. Here, the N seconds is the intracell TCHF-TCHH
handover statistics time. P seconds is the intracell TCHF-TCHH
-
Handover threshold from TCHF to TCHH Handover threshold from TCHH to TCHF
Range: 0 39 Range: 0 39
Unit - Unit -
Default: 30 Default: 10
Description: Within a specified time, if the C/I Description: Within a specified time, if the C/I
threshold value, the handover is triggered. threshold value, the handover is triggered.
TCHH or lower than the handover threshold from TCHH to TCHF.
-
Layer HO watch time Layer HO valid time MS Fast-moving Watch cells
Range: 1 16 Range: 0 16 Range: 1 10
Unit Second Unit Second Unit -
Default: 5 Default: 4 Default: 3
Description: See the desc Description: See the desc Description: The number of cells us
inter-layer handover decisinter-layer handover decisstate. It is not good for the syste
parameter value is too great, but t
inaccurate judgment.
-
MS Fast-moving Valid cells MS Fast-moving time Thrsh.
Range: 1 10 Range: 0255
Unit - Unit Second
Default: 2 Default: 15
Description: This parameter works Description: If the time of MS spe
When an MS has achieved the value Fast-moving time Thrsh. , the MS will be regarded as moving fast.
cells, and if there are MS Fast-Note: Terms to trigger fast-moving handover:
fast. In this case, fast moving han1, Serving cell is not level-4.
2, Destination cell is level-4.
-
Interval for consecutive HO Jud.
Range: 1200
Unit Second
Default: 6
Description: See the description of MAX c
Fast-moving time Thrsh. , the MS will be regarded as moving fast.
Note: Terms to trigger fast-moving handover:
-
Direction for Concentric Cell HO UL to OL HO Allowed
Range: Yes/No
Unit -
Default: Yes
Description: Used to determine whether the handover is performed from
UnderLaid subcell to OverLaid subcell.
-
Direction for Concentric Cell HO OL to UL HO Allowed
Range: Yes/No
Unit -
Default: Yes
Description: Used to determine whether the handover is performed from Ove
subcell to UnderLaid subcell.
-
Criterion for Concentric Cell HO Rx_Lev for Concentric Cell HO Allowed
Range: Yes/No
Unit -
Default: Yes
Description: Used to determine whether the receiving level of downlink is taken as
the judgment condition in the Concentric Cell handover judgment.
-
Criterion for Concentric Cell HO Rx_Qual for Concentric Cell HO Allowed
Range: Yes/No
Unit -
Default: Yes
Description: Used to determine whether the receiving quality of downlink is taken
as the judgment condition in the Concentric Cell handover judgment.
-
Concentric Cell signal intensity difference RX-LEV Thrsh.
Range: 063 Range: 063. (-11
Unit dB Unit Grade
Default: 5, Default: 35
Description: Used to compensate the intensity difference bDescription: When
subcell and UnderLaid subcell. RX-LEV Thrsh. work
The parameter is invalidation while the "Enhanced ConcentrThrsh, TA Thrsh. a
Allowed" is set as "Yes". boundary between O
Note: Intensity difference between OverLaid subcell and Unvalue of this par
amplification power difference between OverLaid subcell anis recommended tha
combiner insertion loss difference + path loss difference Cell Signal Intens
antennas + path loss difference caused by different frequeThe parameter is invalidation while the "
receiving levels of both OverLaid subcell and UnderLaid suAllowed" is set as "Yes".
on site, and the measurement should be performed on multiple sites if different
antennas are used in OverLaid subcell and UnderLaid subcell.
-
RX-LEV Hysteresis Receiving Quality Thrsh. TA hysteresis
Range: 063 Range: 070 Range: 063
Unit dB Unit - Unit bit period, 1
Default: 5 Default: 60 Default: 0
Description: When the "Description: When the "Enhanced Description: When
RX-LEV Hysteresis worksthe parameters for determining t hysteresis works t
Hysteresis, RX-qual Thrand OverLaid subcell together wi RX-qual Thrsh and TA Thrsh. This is to determine the boundary
determine the boundary Hysteresis, TA Thrsh, and TA Hys between OverLaid subcell and UnderLaid subcell.
subcell. When the "Enhanced Concentric Ce When the "Enhanced Concentric Cell Allowed" is set as "Yes", One of
The parameter is invalithe parameters for determining t the parameters for determining the coverage of Underlaid subcell and
Allowed" is set as "YesOverLaid subcell together with R OverLaid subcell together with UL to OL HO received level Thrsh.,
The parameter is invalidation while the "received level Thrsh., OL to UL OL to UL HO received level Thrsh., RX-qual Thrsh , TA Thrsh .
Allowed" is set as "Yes". and TA Hysteresis. Note: The above 5 parameters determine the coverage range of OverLaid
on site, and the measurement should be performed on multiple sites if different subcell and UnderLaid subcell for common Concentric Cell.
OverLaid subcell coverage range can be indicated as follows:
Receiving level >= RX-LEV Thrsh. + RX-LEV Hysteresis; TA
-
Concentric Cell HO watch time Concentric Cell HO valid time
Range: 016 Range: 016
Unit Second Unit Second
Default: 5 Default: 4
Description: See the description of PDescription: See the description of P
Concentric Cell handover decision. Concentric Cell handover decision.
RX-qual Thrsh and TA Thrsh. This is to determine the boundary
between OverLaid subcell and UnderLaid subcell.
When the "Enhanced Concentric Cell Allowed" is set as "Yes", One of
the parameters for determining the coverage of Underlaid subcell and
OverLaid subcell together with UL to OL HO received level Thrsh.,
OL to UL HO received level Thrsh., RX-qual Thrsh , TA Thrsh .
Note: The above 5 parameters determine the coverage range of OverLaid
subcell and UnderLaid subcell for common Concentric Cell.
OverLaid subcell coverage range can be indicated as follows:
Receiving level >= RX-LEV Thrsh. + RX-LEV Hysteresis; TA
-
Assign optimum layer Assign-Optimum-Level Thrsh. Assign-Optimum-TA Thrsh
Range: System optimization,Range: 063,(-110 dBm-47 dBm) Range: 0255
Unit - Unit dBm Unit
Default: When "Cell system Default: 35 Default: 63
Underlaid subcell; When "Ce Description: After selection of opti Description: After selection of
GSM900/DCS1800, the default estimated (inserted/ filtered) as pe estimated (inserted/ filtered)
Description: In the Concentthe previous SDCCH MR. OverLaid subc the previous SDCCH MR. OverLaid
1) System optimization modeare allocated as per the comparison are allocated as per the compar
optimum layer for TCH assiglevel of SDCCH and Assign-Optimum- level of SDCCH and Assign-Opt
through the ULs SDCCH between TA and Assign-Optimum-TA T between TA and Assign-Optimum
2) UnderLaid Subcell: Under allocated with OverLaid Subcell only allocated with UnderLaid Subcell only if the receiving level is greater
3) OverLaid Subcell: OverLa than "Assign-Optimum-Level Thrsh", a than Assign-Optimum-Level Thrsh, and TA smaller than
4) No preference: no specifAssign-Optimum-TA Thrsh. Otherwise, Assign-Optimum-TA Thrsh. Otherwise, MS are allocated with
UnderLaid cells to ensure the succes OverLaid cells to ensure the successful assignment.
Note: If SDCCH is on an external cir Note:
threshold +internal/external circle When the Assign-Optimum-TA Thrsh is set as 0, the UnderLaid
balanced uplink/downlink margin + SD subcell cannot be allocated to MS because no TA is smaller than the
margin. If SDCCH is on an internal c TA threshold. In this case, the OverLaid subcell is the assignment
as 25) = edge handover threshold + u optimum layer.
-
TA pref. Of Imme-Assign Allowed TA Thrsh. Of Imme- Assign pref.
Range: Yes (1), No (0) Range: 0255
Unit - Unit -
Default: No (0) Default: 60 for double timeslots extended
Description: It determinates whether the s0 for others
ACCESS_DELAY in CHANNEL_REQUEST message. Description: While the TA pref. Of Imme-As
If it is set as "No", system prefer the chACCESS_DELAY in CHANNEL REQUEST message is
is set as "No", system prefer the channel Thrsh. Of Imme- Assign pref.", system will
ACCESS_DELAY is less than "TA Thrsh. Of Imoverlaid subcell, otherwise prefer the cha
otherwise prefer the channel in Underlaid subcell.
allocated with UnderLaid Subcell only if the receiving level is greater
than Assign-Optimum-Level Thrsh, and TA smaller than
Assign-Optimum-TA Thrsh. Otherwise, MS are allocated with
OverLaid cells to ensure the successful assignment.
When the Assign-Optimum-TA Thrsh is set as 0, the UnderLaid
subcell cannot be allocated to MS because no TA is smaller than the
TA threshold. In this case, the OverLaid subcell is the assignment
-
Pref. subcell in HO of intra-BSC Incoming-to-BSC HO optimum layer
Range: System Optimization, OverLaid Subcel Range: UnderLaid subcell, OverLaid subcell,
Unit - Unit -
Default: System Optimization Default: UnderLaid subcell
Description: The incoming HO intra-BSC optiDescription: Generally, the inter-BSC hando
cell is configured as an Concentric cell, t In this case, the UnderLaid subcell can be selected preferably. In
of incoming intra-BSC handover request in B the case of 1800 and 900 that share the same site location, the
1) System Optimization, Add the receiving l inter-BSC handover is hardly triggered at the edge of a cell. The
Concentric cell with the handover request. OverLaid subcell can be selected preferably. If the handover success
compares the receiving level with RX_LEV Th rate is low, it is recommended that the UnderLaid subcell should be
optimum layer, without regard to RX_LEV Hysselected preferably.
2) UnderLaid Subcell: UnderLaid Subcells ar Note: BCCH carrier must be configured as UnderLaid subcell.
3) OverLaid Subcell: OverLaid Subcells are 1) The carrier with SDCCH must be configured as UnderLaid subcell.
4) No priority: Channels are allocated base 2) The handover between OverLaid and UnderLaid subcells will be
without specified instruction. forbidden If both RX-LEV Thrsh. and RX-LEV Hysteresis are 63.
3) The handover between OverLaid and UnderLaid subcells will be
forbidden If both TA Thrsh. and TA Hysteresis are 63.
4) The dual timeslot extended cell adopts Concentric Cell for data
configuration. See the reference for dual timeslot extended cell.
-
Enhanced Concentric Cell allowed UL to OL Traffic HO Allowed
Range: Yes (1), No (0) Range: Yes (1), No (0)
Unit - Unit -
Default: Yes (0) Default: Yes (0)
Description: It determinates whether the ceDescription: It determines whether t
In this case, the UnderLaid subcell can be selected preferably. In conditions for underlaid to overlaid
the case of 1800 and 900 that share the same site location, the If it is set as "Yes", and the traff
inter-BSC handover is hardly triggered at the edge of a cell. The Thrsh. of underlaid", MS will hand o
OverLaid subcell can be selected preferably. If the handover success If "UL to OL Traffic HO Allowed" is
rate is low, it is recommended that the UnderLaid subcell should be underlaid subcell will not be consid
underlaid to overlaid.
Note: BCCH carrier must be configured as UnderLaid subcell. Note: When "Enhanced Concentric Cell
1) The carrier with SDCCH must be configured as UnderLaid subcell. available.
2) The handover between OverLaid and UnderLaid subcells will be
forbidden If both RX-LEV Thrsh. and RX-LEV Hysteresis are 63.
3) The handover between OverLaid and UnderLaid subcells will be
forbidden If both TA Thrsh. and TA Hysteresis are 63.
4) The dual timeslot extended cell adopts Concentric Cell for data
configuration. See the reference for dual timeslot extended cell.
-
Traffic Thrsh. of underlaid Underlaid HO Step period
Range: 0100 Range: 1255
Unit - Unit Second
Default: 80 Default: 5
Description: If "UL to OL Traffic HO Description: If there are some h
underlaid subcell is over "Traffic T overlaid at the same time, syste
over from underlaid to overlaid; oth level. This does not accord with
subcell because the signal quality i be handed over firstly.
If "UL to OL Traffic HO Allowed" is The grade by grade algorithm is
underlaid subcell will not be consid level.
underlaid to overlaid. The parameter is the time for th
Note: When "UL to OL Traffic HO Allo decreases "Underlaid HO Step lev
Note: When "Enhanced Concentric
available.
-
Underlaid HO Step level Penalty Time of UL to OL HO (s)
Range: 163 Range: 0 255
Unit - Unit Second
Default: 5 Default: 10
Description: In the grade by gr Description: If "Penalty allowed" is set to "Yes" in the [Handover control table],
handover band is extended from when a call is handed over from an underlaid to overlaid subcell, to
with high level firstly. prevent ping-pong handover, the call cannot be handed back to the
The parameter is the step that underlaid subcell in the "Penalty Time of UL to OL HO (S)".
Note: If this parameter is set to 0, there is no penalty for the UL-to-OL
It is used to control the gradehandover.
underlaid to overlaid with "Und Note: When "Enhanced Concentric Cell allowed" is set as "Yes", it is
The "Underlaid HO Step period" available.
band level decreases "Underlaid HO Step level".
Note: When "Enhanced Concentric Cell allowed" is set as "Yes", it is
available.
-
Description: If "Penalty allowed" is set to "Yes" in the [Handover control table],
when a call is handed over from an underlaid to overlaid subcell, to
prevent ping-pong handover, the call cannot be handed back to the
If this parameter is set to 0, there is no penalty for the UL-to-OL
Note: When "Enhanced Concentric Cell allowed" is set as "Yes", it is
-
PC algorithm RX_LEV Thrsh. for UL increase RX_LEV Thrsh. for DL increase
Range: HW_1. HW_ Range: 063. (-110 dBm -47 dBm) Range: 063. (-110 dBm -47 dBm)
Unit - Unit Grade Unit Grade
Default: HW_2 Default: 20 Default: 20
Description: Pow Description: Description:
Note: 1, BTS3X s Indicates that when the receiving signaIndicates that when the receiving signa
adopted for BTS2 the set value of this parameter, the po than the set value of this parameter, t
Pre-process must increased. be increased.
control can be implemented at BTS side (MR Pre-process can be enabled).
-
P1 N1 RX_LEV Thrsh. for UL decrease
Range: 132 Range: 132 Range: 063. (-110 dBm- +47 dBm)
Unit - Unit - Unit Grade
Default: 12 Default: 10 Default: 40
Description: StaDescription: Description: Indicates that when the re
performed duringAmong P1 MRs, if the set value of this parameter, the po
judge whether adRX_LEV Thrsh. DL/UL increase, MS or BTS power output
increase.
-
RX_LEV Thrsh. for DL decrease P2 N2
Range: 063. (-110 dBm- +47 dBm) Range: 132 Range: 132
Unit Grade Unit - Unit -
Default: 40 Default: 20 Default: 19
Description: Description: Description: A
Indicates that when the receiving downlStatistics of theRX_LEV Thrsh.
the set value of this parameter, the po performed during power output is triggered.
decrease. judge whether decrement of uplink or downlink power is needed.
-
Qual. Thrsh. for UL increase Qual. Thrsh. for DL increase P3
Range: 07 Range: 07 Range: 132
Unit Grade Unit Grade Unit -
Default: 5 Default: 5 Default: 7
Description: Indicates that when the rDescription: Description:
the set value of this parameter, the pIndicates that when the receiving signStatistics of t
power output is triggered. than the set value of this parameter, performed durin
judge whether decrement of uplink or downlink power is needed. be increased. judge whether i
-
N3 Qual. Thrsh. for UL decrease Qual. Thrsh. for DL decrease
Range: 132 Range: 07 Range: 07
Unit - Unit Grade Unit Grade
Default: 5 Default: 1 Default: 1
Description: Description: Description:
Among P3 MRs, Indicates that when the receiving signIndicates that when the receiving sign
Qual. Thrsh. than the set value of this parameter, than the set value of this parameter,
output is trigbe decreased. be decrease.
-
P4 N4 Power Control Adjust Period DL RX_LEV Expected
Range: 132 Range: 132 Range: 110 Range: 063(-110 dBm -
Unit - Unit - Unit: Unit Grade
Default: 18 Default: 15 Default: 10 Default: 35
Description: Description: Description Normal cell power contro Description:
Statistics of tAmong P4 MRs, if the receiving quality in N4 MRs is It defines the signal st
performed durinQual. Thrsh. for DL/UL decrease, decrement of MSstable state. Expected s
judge whether doutput is triggered. edge handover threshold
bring Ping-Pong handover
-
Filter Length for DL RX_LEV DL RX_LEV Compensation DL Qual. Expected
Range: 131 Range: 0100 Range: 07
Unit - Unit % Unit Grade
Default: 5 Default: 80 Default: 1
Description: Description: Description: The expect
Indicate the number of MRs in which The power adjustment will chanshowing the power adjus
of downlink is taken in a stable sta between the actual receiving level and the expected r
The purpose of setting this paramete The downlink compensation factor acts as the weight c
mutation factors so that analysis of such adjustment. When the difference is fixed, the gr
adjustment is not too partial. When compensation factor, the greater the BTS power adjust
the influence due to mutation will b Note: The sum of downlink path loss compensation fact
adjustment is not timely. If the win compensation factor must be 100.
adjustment will not be accurate enough.
-
Filter Length for DL Qual. DL Qual. Compensation BTS Min Tx Power
Range: 131 Range: 0100 Range: 036
Unit - Unit % Unit dBm
Default: 5 Default: 20 Default: 4
Description: Description: Description: Indicatin
Indicating the number of MRs in whiThe power adjustment will ch station. No matter what the original
of downlink is taken in a stable stbetween the actual downlink levels it can be down-tuned, the transmitting power of the base
The purpose of setting this parametquality. The downlink compen station cannot be lower than this value.
mutation factors. When the filterinco-efficient of such adjustment. When the difference is fixed, the
due to mutation will be weakened, tgreater the compensation factor, the greater the BTS power
is not timely; if the window is tooadjustment.
not be accurate enough. Note: The sum of downlink path loss compensation factor and downlink quality
compensation factor must be 100.
-
MAX PC Step PC Adj. Range PC Interval Initial RX_LEV Expected
Range: 116 Range: 116. CorrRange: 116 Range: 063, (-110 dBm -47
Unit grade, 2 d Unit grade, every Unit SACCH peri Unit Grade
Default: 8 Default: 16 Default: 4 Default: 30
Description: DeDescription: IndicDescription: ThDescription: Expectant signal s
station. No matter what the original be adjusted Normally, its value should be
levels it can be down-tuned, the transmitting power of the base Expected.
station cannot be lower than this value.
co-efficient of such adjustment. When the difference is fixed, the
greater the compensation factor, the greater the BTS power
Note: The sum of downlink path loss compensation factor and downlink quality
-
Filter Length for Initial RX_LEV Stable RX_LEV Expected
Range: 131 Range: 063, (-110 dBm- +47
Unit - Unit Grade
Default: 2 Default: 30
Description: Indicates the number of MRs toDescription: The signal streng
judgment of the uplink signal strength to a DL RX_LEV expected > Edge HO U
change at PC initial stage. If the filterin will cause Ping-Pong handover
impact of sudden change will be weakened but the BTS power
adjustment is not timely. If the window is too short, BTS power
adjustment will be inaccurate. At the initial stage, the power
adjustment of MS depends only on the receiving signal level but
receiving signal quality. To decrease MS transmitting power as soon
as possible, normally the value should be less than the value of
Filter length for stable RX_LEV
-
Filter Length for Stable RX_LEV UL RX_LEV Compensation UL Qual. Expected
Range: 131 Range: 1100 Range: 07
Unit - Unit % Unit grade
Default: 5 Default: 80, Indicates when thDefault: 1
Description: Indicates the number of MRs tideal level is 5 dB , power isDescription: The signal
judgment of the uplink signal strength to Description: The power adjustment range will change a
change in stable stage. If the filtering wbetween the actual receiving level and the expected
of sudden change will be weakened but the RX_LEV compensation acts as the weighting coefficie
not timely. If the window is too short, MSdifference. When the difference is fixed, the greater
inaccurate. At the stable stage, the MS pocompensating factor, the greater the MS power adjustm
the receiving signal level and quality. PoNote: The sum of downlink path loss compensation factor and downlink quality
state is started once Filter length for compensation factor must be 100.
matter whether power control at initial stage is performed.
-
Filter Length for Qual. UL Qual. Compensation Power Increment after HO Fail.
Range: 131 Range: 0100 Range: 04
Unit - Unit % Unit 2 dB
Default: 6 Default: 20 ( when the diffe Default: 2
Description: Indicates the numbexpected quality is 1 class, Description: Indicates the power level t
judgment of the uplink signal q 1*20%*10) returning to the original channel after
change in stable stage. If the Description: The power adjustment range will change along with the di
of sudden change will be weakenbetween the actual receiving quality and the expected quality. The
not timely. If the window is toUL Qual. compensation acts as the weighting coefficient of such
inaccurate. difference. When the difference is fixed, the greater the
Note: The sum of downlink path loss compensation factor and downlink quality compensating factor, the greater the MS power adjustment.
Note: The sum of downlink path loss compensation factor and downlink
compensation factor must be 100.
-
MAX PC Step PC Interval Filter Length for UL RX_LEV
Range: 115 Range: 115 Range: 120
Unit 2 dB Unit SACCH peri Unit -
Default: 8 Default: 3 Default: 5
Description: InDescription: ThDescription: Indicates the number of
be performed. commands. judgment of the uplink signal streng
Note 1) In HW_1 PC algorithm, Note: For versions before G3BTS24.20000.06.111/G3BTS32.30000.04.1130
(UL/DL stable RX_LEV expected /G3BTS34.30000.07.0301/G3BTS36.30000.02.0820, this parameter must be set
strength) * UL/DL RX_LEV compe 520 when BTS is configured with MR pre-processing and G-II power contro
quality UL/DL Qual. expectedOtherwise, error will occur in TRX configuration flow. For versions menti
final adjustment power level s and the subsequent versions, this parameter can be set as 120.
step.
2) Before determine a power level to be adjusted, the error
tolerance table should be first searched according the currently
transmitting power level. The power level to be adjusted should not
exceed the error tolerance shown in the following table.
1800M:
Level 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Error
tolerance 2 2 2 2 2 2 2 2 2 3 3 3 3 3 4 4 4 2 2 2
900M:
Level 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Error
tolerance 2 2 2 4 4 4 4 4 4 4 4 4 4 4 4 4 6 6 6 6
-
Filter Length for DL RX_LEV Filter Length for UL Qual.
Range: 120 Range: 120
Unit Unit -
Default: 6 Default: 6
Description: Indicates the number of Description: Indicates the number o
judgment of the downlink signal stre judgment of the uplink signal quali
Note: For versions before G3BTS24.20000.06.111/G3BTS32.30000.04.1130 Note: For versions before G3BTS24.2
/G3BTS34.30000.07.0301/G3BTS36.30000.02.0820, this parameter must be set /G3BTS34.30000.07.0301/G3BTS36.3000
520 when BTS is configured with MR pre-processing and G-II power contro520 when BTS is configured with M
Otherwise, error will occur in TRX configuration flow. For versions mentiOtherwise, error will occur in TRX
and the subsequent versions, this parameter can be set as 120. and the subsequent versions, this
transmitting power level. The power level to be adjusted should not
-
Filter Length for DL Qual. MR. Compensation Allowed UL MR. Number Predicted
Range: 120 Range: Yes, No Range: 03
Unit - Unit - Unit number of MRs
Default: 5 Default: Yes Default: 2
Description: Indicates the number oDescription: During the power co Description: The number of upli
judgment of the downlink signal quathe impact of different transmit the future receiving signal str
Note: For versions before G3BTS24.2signal strength. When the value counteract the impact of the po
/G3BTS34.30000.07.0301/G3BTS36.3000currently received MR will be placed into the MR compensation
520 when BTS is configured with Mqueue. Then, according to the recorded information about MS and
Otherwise, error will occur in TRX BTS power changes, the receiving signal strength of the MR is
and the subsequent versions, this compensated.
-
DL MR. Number Predicted MAX Down Adj. value Qual. zone 0
Range: 03 Range: 030
Unit number of MRs Unit dB
Default: 2 Default: 4
Description: The number of downDescription: The maximum downward power adj
algorithm, the future receiving In HW_II PC algorithm, the receiving signal
to counteract the impact of thethree quality zones (0, 12, 3), and different maximum downward
power adjustment steps are set for each zone. In the power
adjustment according to the receiving signal strength, consideration
should be given to the maximum step adjustment for each zone.
-
MAX Down Adj. value Qual. zone 1 MAX Down Adj. value Qual. zone 2
Range: 030 Range: 030
Unit dB Unit dB
Default: 4 Default: 4
Description: The maximum downward power adjDescription: The maximum downward power ad
1 or 2.
three quality zones (0, 12, 3), and different maximum downward
power adjustment steps are set for each zone. In the power
adjustment according to the receiving signal strength, consideration
should be given to the maximum step adjustment for each zone.
-
MAX Down Adj. PC Value by Qual. MAX Up Adj. PC Value by RX_LEV
Range: 04 Range: 032
Unit dB Unit dB
Default: 4 Default: 16
Description: The adjustment step allowed fDescription: It is used to set the maxim
receiving signal quality. control by receive level.
Note In HW_II PC algorithm, the power adjuNote:
receiving signal strength and the receivin1) BTS3X macro cellular: G3BTS32.30000.0
power control adjustment direction and stesupport the function that the upward adj
combining the two, as shown as follow tablupward adjustment step is processed resp
receive quality power control. Other ver
receive quality power control and the up
the downward adjustment step is processe
adjustment step.
2) BTS3002C: G3BTS36.30000.03.0820and la
the function that the upward adjustment
adjustment step is processed respectivel
quality power control. Other versions do
quality power control and the upward adj
downward adjustment step is processed as
adjustment step.
3) Other type sites: all versions do not
upward adjustment steps and the upward a
processed respectively; do not support b
control.
-
MAX Up Adj. PC Value by Qual. BTS PC class UL Qual. Bad TrigThrsh
Range: 032 Range: 116; corRange: 07
Unit dB Unit Grade Unit -
Default: 8 Default: 16 Default: 5
Description: It is used to set the maxiDescription: The Description: In uplink power c
control by receive quality. Note: For versio less than this start threshold
Note: 07.0301/ BTS3002 strength of uplink" will be ad
1) BTS3X macro cellular: G3BTS32.30000.when BTS is conf when the receiving quality of
support the function that the upward adcontrol. Otherwi configuration. Thus, the expected level in uplink power cont
upward adjustment step is processed resversions mention be increased furthermore.
receive quality power control. Other veparameter can be set as 116.
receive quality power control and the upward adjustment step and
the downward adjustment step is processed as the downward
adjustment step.
2) BTS3002C: G3BTS36.30000.03.0820and later versionsupport the
function that the upward adjustment step and the upward adjustment
step is processed respectively; support bad receive quality power
control. Other versions do not support bad receive quality power
control and the upward adjustment step and the downward
adjustment step is processed as the downward adjustment step.
3) Other type sites: all versions do not support the function that the
upward adjustment step and the upward adjustment step is
processed respectively; do not support bad receive quality power
control.
PC adjustment of
receiving signal
strength
PC adjustment of
receiving signal
quality
Power control adjustment
combining the receiving signal
strength and quality
AdjStep_Lev AdjStep_Qul maxAdjStep_Lev,AdjStep_Qul)
AdjStep_Lev AdjStep_Qul No action
AdjStep_Lev No action AdjStep_Lev
AdjStep_Lev AdjStep_Qul AdjStep_Lev
AdjStep_Lev AdjStep_Qul max(AdjStep_Lev,AdjStep_Qul)
AdjStep_Lev No action AdjStep_Lev
No action AdjStep_Qul AdjStep_Qul
No action AdjStep_Qul AdjStep_Qul
No action No action No action
-
UL Qual. Bad UpLEVDiff DL Qual. Bad TrigThrsh DL Qual. Bad UpLEVDiff
Range 063 Range 07 Range 063
Unit dB Unit - Unit dB
Default 0 Default 5 Default 0
Description In uplink power coDescription In downlink power Description In downlink power
start threshold when the receinot less than this start thresthan "start threshold when the
actual "upper threshold of sigsignal strength of downlink" wthe actual "upper threshold of signal strength of downlink" will be
with this offset value. offset of level when the receiadded with this offset value.
configuration. Thus, the expected level in uplink power contdata configuration. Thus, the expected level in downlink power
control can be increased furthermore.
-
Period for Adjusting Power Control Expected Stable Downlink signal strength
Range: 116 Range: 163
Unit SACCH period (480ms) Unit Level grade
Default: 5 Default: 35
Description: The minimum time interval betweenNote
commands Definition of expected signal strength in stable MS. E
the actual "upper threshold of signal strength of downlink" will be downlink signal strength > downlink edge handover thre
(handover parameter), otherwise the power control can
data configuration. Thus, the expected level in downlink power problem of ping pang handover.
-
Downlink Signal Strength Filter Length
Range: 131
Unit -
Default: 5
Description: Under stable status, before adjusting
measurement report that compute average downlink si
strength. The purpose of this parameter is to elimi
from burst factors, so that the decision of whether
control can be supported. Excessive filter window l
weaken the influence of burst, but may result in de
control adjustment; insufficient filter window leng
burst factors, can not reflect the actual condition
inaccurate power control adjustment.
-
Downlink Path Loss Compensation Factors Expected Downlink Quality
Range: 0100 Range: 07
Unit % Unit Grade
Default: 80 Default: 1
Description: The adjustment amplitude varies between Description: In stable status, exp
between actual level received by MS and expected lev the direction of power control adj
compensation factor is the weight coefficient of such difference.
That means the larger the compensation factor, the larger the
power need to be adjusted in BTS.
Note
The sum of the two parameters Downlink Path Loss Compensation
Factor and Downlink Path Quality Compensation Factor must be 100
-
Downlink Quality Filter Length Downlink Quality Compensation Factor
Range: 131 Range: 0100
Unit - Unit %
Default: 5 Default: 20
Description: Under stable status, before Description: The adjustment amplitude varies bet
measurement reports that compute average between actual downlink quality and expected dow
The purpose of this parameter is to elim Downlink quality compensation factor is the weig
factors, so that the decision of whether such difference. If the difference is consistent, the larger the
be supported. Excessive filter window le compensation factor, the larger the power need to be adjusted in
influence of burst, but may result in de BTS.
adjustment; insufficient filter window l Note
power control adjustment. The sum of the two parameters Downlink Path Loss Compensation
Factor and Downlink Path Quality Compensation Factor must be 100
-
Minimum Transmit Power of BTS
Range: 010
Unit dBm
Default: 4
Description: The acceptable minimum tra
power cannot be less than the value despite of the initial power and
allowed decrease grades of BTS.
such difference. If the difference is consistent, the larger the
compensation factor, the larger the power need to be adjusted in
The sum of the two parameters Downlink Path Loss Compensation
Factor and Downlink Path Quality Compensation Factor must be 100
-
Maximum Step Length in Adjusting Power Control Grades of BTS Power Control
Range: 015 Range: 116
Unit Grade. 2dB per grade Unit Grade. 2dB per grade
Default: 8 Default: 16
Description: The maximum step length in adjusting BTS power. Description: Maximum value in adjust
power cannot be less than the value despite of the initial power and
-
Registration Period Expected Initial Signal Strength
Range: 116 Range: 163
Unit SACCH period (480ms) Unit Level Grade
Default: 5 Default: 30
Description: The minimum tDescription: Expected signal receiving stre
commands. power control. Generally we should adopt va
the expected stable signal strength.
-
Filter Length in Initial Adjustment Stage
Range: 131
Unit -
Default: 2
Description: In the initial stage of power control, bef
the number of measurement reports that compute average
signal strength. The purpose of this parameter is to el
influence from burst factors, so that the decision of w
the power control can be supported. Excessive filter window length
can weaken the influence of burst, but may result in delayed MS
power control adjustment; insufficient filter window length leads to
inaccurate power control adjustment. In the initial stage, the
adjustment of MS power is merely subject to the level rather than the
quality of signal reception. To decrease the MS transmit power as
soon as possible, we generally adopts value that is less than the
length of filter in stable status.
-
Expected Signal Strength in Stable Status
Range: 163
Unit Level Grade
Default: 30
Description: Expected signal receiving strength in stab
signal strength > uplink edge handover threshold (hando
parameter), otherwise the power control can cause the p
ping pang handover.
the power control can be supported. Excessive filter window length
can weaken the influence of burst, but may result in delayed MS
power control adjustment; insufficient filter window length leads to
inaccurate power control adjustment. In the initial stage, the
adjustment of MS power is merely subject to the level rather than the
quality of signal reception. To decrease the MS transmit power as
soon as possible, we generally adopts value that is less than the
-
Signal Filter Length in Stable Status Uplink Path Loss Compensation Factor
Range: 131 Range: 1100
Unit - Unit %
Default: 5 Default: 80 (the difference between current leve
Description: Under stable stage, before adjusting the power by 4dB, that is, 5*80/100)
measurement reports that compute average uplink siDescription: The power adjustment amplitude varies between different difference
The purpose of this parameter is to eliminate inflbetween actual uplink receiving level and expected uplink receiving
factors, so that the decision of whether adjust thlevel. Uplink compensation factor is the weight coefficient of such
be supported. Excessive filter window length can wdifference. If such difference is consistent, the larger the
influence of burst, but may result in delayed MS pcompensation factor, the larger the power need to be adjusted in MS.
adjustment; insufficient filter window length leadNote The sum of the two parameters Uplink Path Loss Compensation
power control adjustment. In the stable stage, theFactor and Uplink Path Quality Compensation Factor must be 100.
power is subject to both level and quality of signal reception. When
expected stable filter window is full, initiate the power adjustment in
stable status, no matter whether the initialization adjustment is
implemented.
-
Expected Uplink Quality Quality Filter Length in Stable Stage
Range: 07 Range: 131
Unit Grade Unit -
Default: 1 Default: 6
Description: Expected signal re Description: Under stable status, before adjusting
Description: The power adjustment amplitude varies between different difference measurement reports that compute average uplink si
between actual uplink receiving level and expected uplink receiving purpose of this parameter is to eliminate influenc
level. Uplink compensation factor is the weight coefficient of such so that the decision of whether adjust the power c
difference. If such difference is consistent, the larger the supported. Excessive filter window length can weak
compensation factor, the larger the power need to be adjusted in MS. of burst, but may result in delayed MS power contr
Note The sum of the two parameters Uplink Path Loss Compensation insufficient filter window length leads to inaccur
Factor and Uplink Path Quality Compensation Factor must be 100. adjustment.
-
Uplink Quality Compensation Factor
Range: 1100
Unit %
Default: 20 (the current quality is 1 grade lo
power by 2dB, that is (1*20/100) *10)
Description: The power adjustment amplitude va
between actual uplink quality and expected uplink quality. Uplink
compensation factor is the weight coefficient of such difference. If
such difference is consistent, the larger the compensation factor, the
larger the power need to be adjusted in MS.
Note The sum of the two parameters Uplink Path Loss Compensation
Factor and Uplink Path Quality Compensation Factor must be 100.
-
Increase power range after handover fails
Range: 010
Unit Grade. 2dB per grade
Default: 2
Description: Enlarged MS power when returning the origi
handover fails, to avoid call drop.
between actual uplink quality and expected uplink quality. Uplink
compensation factor is the weight coefficient of such difference. If
such difference is consistent, the larger the compensation factor, the
Note The sum of the two parameters Uplink Path Loss Compensation
Factor and Uplink Path Quality Compensation Factor must be 100.
-
Maximum Step Length in Power Control Power Control Adjustment Period
Range: 015 Range: 115
Unit Grade. 2dB per grade Unit SACCH period (480ms)
Default: 8 Default: 3
Description: The maximum dynamic adjusted step l Description: The minimum time interval bet
commands.
-
Uplink Level Filter Length Downlink Level Filter Length
Range: 120 Range: 120
Unit - Unit -
Default: 6 Default: 5
Description: Before adjusting the MDescription: Before adjusting the BTS
that compute average uplink signal that compute average downlink signal s
Note Note
In G3BTS24.20000.06.1111 or earlierG3BTS24.20000.06.1111 or earlier versi
G3BTS32.30000.04.1130 or earlier veG3BTS32.30000.04.1130 or earlier versi
G3BTS34.30000.07.0301 or earlier veG3BTS34.30000.07.0301 or earlier versi
G3BTS36.30000.02.0820 or earlier veG3BTS36.30000.02.0820 or earlier versi
measurement reports in BTS configurmeasurement reports in BTS configurati
parameter is 520. Parameter not iparameter is 520. Parameter not in t
configuration errors. Above listed configuration errors. Above listed BTS
can support the parameter from 1 tocan support the parameter from 1 to 20
-
Uplink Quality Filter Length Downlink Quality Filter Length
Range: 120 Range: 120
Unit - Unit -
Default: 6 Default: 6
Description: Before adjusting the MS pDescription: Before adjusting the MS pow
that compute average uplink signal quathat compute average uplink signal quali
Note Note
G3BTS24.20000.06.1111 or earlier versiG3BTS24.20000.06.1111 or earlier version
G3BTS32.30000.04.1130 or earlier versiG3BTS32.30000.04.1130 or earlier version
G3BTS34.30000.07.0301 or earlier versiG3BTS34.30000.07.0301 or earlier version
G3BTS36.30000.02.0820 or earlier versiG3BTS36.30000.02.0820 or earlier version, when pre-processing
measurement reports in BTS configuratimeasurement reports in BTS configuration of Huawei II, the range of
parameter is 520. Parameter not in tparameter is 520. Parameter not in this range may cause TRX
configuration errors. Above listed BTSconfiguration errors. Above listed BTS versions or higher versions
can support the parameter from 1 to 20can support the parameter from 1 to 20.
-
Switch of Measurement Report Compensation
Range: Yes, No
Unit -
Default: Yes
Description: After the switch is on, the received measu
the measurement report compensation queue. Then record
information about variation of transmit power according
values of MS and BTS in the reports. After interpolatio
measurement reports, compensate the receiving level of
measurement reports according to above recorded information.
G3BTS36.30000.02.0820 or earlier version, when pre-processing
measurement reports in BTS configuration of Huawei II, the range of
parameter is 520. Parameter not in this range may cause TRX
configuration errors. Above listed BTS versions or higher versions
-
Uplink Prediction Measurement Reports
Range: 03
Unit The number of measurement reports
Default: 2
Description: In the Huawei II power control algor
control is not subject to the average filter value
measurement reports. The method is add prediction
to offset the delay of power adjustment. This para
number of uplink measurement reports that performs
measurement reports according to above recorded information.
-
Downlink Prediction Measurement Reports
Range: 0 3Unit The number of measurement reports
Default: 2
Description: In the Huawei II power control algorith
control is not subject to the average filter value i
measurement reports. The method is add prediction fu
to offset the delay of power adjustment. This parame
number of downlink measurement reports that performs
prediction.
-
Uplink Signal Strength Upper Threshold
Range: 0 63 (mapping -110 -47dBm) Unit Level Grade
Default: 35
Description: In calculation of power control step,
upper threshold and lower threshold. No need to adj
falls between the upper threshold and lower one. On
power control when a signal is out of this range. T
defines the upper threshold of uplink signal in pow
signal level exceeds the upper threshold, the power
increased by: (=(Upper Threshold + Lower Threshold
The actual adjusting step length is decided by both
increment and the maximum adjusting step length all
quality band.
-
Uplink Signal Strength Lower Threshold
Range: 0 63 (mapping -110 -47dBm) Unit Level Grade
Default: 25
Description: In calculation of power control step,
upper threshold and lower threshold. No need to adj
falls between the upper threshold and lower one. On
power control when a signal is out of this range. T
defines the lower threshold of uplink signal in pow
signal level is less than the lower threshold, the
decreased by: (=Received Level (Upper Threshold + The actual
adjusting step length is decided by both the decrem
maximum adjusting step length allowed in the qualit
-
Downlink Signal Strength Upper Threshold
Range: 0 63 (mapping -110 -47dBm) Unit Level grade
Default: 40
Description: In calculation of power control step, the
upper threshold and lower threshold. No need to adjust
falls between the upper threshold and lower one. Only
power control when a signal is out of this range. This
defines the upper threshold of downlink signal in powe
signal level exceeds the upper threshold, the power sh
increased by: (=(Upper Threshold + Lower Threshold)/2
The actual adjusting step length is decided by both th
increment and the maximum adjusting step length allowe
quality band.
-
Downlink Signal Strength Lower Threshold
Range: 0 63 (mapping -110 -47dBm) Unit Level grade
Default: 30
Description: In calculation of power control step, the
upper threshold and lower threshold. No need to adjust
falls between the upper threshold and lower one. Only
power control when a signal is out of this range. This
defines the lower threshold of downlink signal in powe
signal level is less than the lower threshold, the pow
decreased by: (=Received Level (Upper Threshold + LowThe actual
adjusting step length is decided by both the decrement
maximum adjusting step length allowed in the quality band.
-
Maximum Step Length of Downward Power Control in Quality Band 0 According to Level
Range: 0 30Unit dB
Default: 4
Description: In Huawei II power control algorithm, the quality is split into three
bands according to the quality of signal receiving (RQ value): 0, 1 2,3. When adjusting power according to level, the maximum step
length of downward power adjustment varies between different
quality bands. If the maximum step length allowed in downward
adjustment is insufficient, the algorithm cannot achieve quick power
control; if such a step length is too long, the validity of power control
may be reduced. This parameter defines the maximum step length
that can be adjusted in downward power control when RQ value is 0.
maximum adjusting step length allowed in the quality band.
-
Maximum Step Length of Downward Power Control in Quality Band 1 According to Level
Range: 0 30Unit dB
Default: 4
Description: In the power adjustment according to the level, this parameter
defines the maximum step length that can be adjusted in downward
power control when RQ value is 1 or 2 (falls into the quality band (0,1)).
-
Maximum Step Length of Downward Power Control in Quality Band 2 According to Level
Range: 0 30Unit dB
Default: 4
Description: In the power adjustment according to the level, this parameter
defines the maximum step length that can be adjusted in downward
power control when quality RQ value3.
-
Maximum Step Length of Downward Power Control According to the Quality
Range: 0 4Unit dB
Default: 4
Description: Allowed maximum step length that can be adjusted in downward
power control according to the quality of receiving signals.
Note
G3BTS24.20000.06.1111 or earlier version,
G3BTS32.30000.04.1130 or earlier version,
G3BTS34.30000.07.0301 or earlier version,
G3BTS36.30000.02.0820 or earlier version, when pre-processing
measurement reports in BTS configuration of Huawei II, the range of
parameter is 2 4. Parameter not in this range may cause TRXconfiguration errors. Above listed BTS versions or higher versions
can support the parameter from 0 to 4.
-
Maximum Step Length of Upward Power Control According to the Level
Range: 0 32Unit dB
Default: 16
Description: Allowed maximum step length that can be adjusted in upward power
control according to the level.
Note
(1) BTS3X macro cell: G3BTS32.30000.04.1130 and higher version
allow to separately process upward step length and downward step
length and support power control for poor quality; the earlier version
does not provide such functions.
(2) BTS3002C: G3BTS36.30000.03.0820 and higher version allow to
separately process upward step length and downward step length
and support power control for poor quality; the earlier version does
not provide such functions.
(3) Other sites: All version neither allows to separately process
upward step length and downward step length, nor supports power
control for poor quality.
-
Maximum Step Length of Upward Power Control According to the Quality
Range: 0 32Unit dB
Default: 8
Description: Allowed maximum step length that can be adjusted in upward power
control according to the quality of receiving signals.
Note
(1) BTS3X macro cell: G3BTS32.30000.04.1130 and higher version
allow to separately process upward step length and downward step
length and support power control for poor quality; the earlier version
does not provide such functions.
(2) BTS3002C: G3BTS36.30000.03.0820 and higher version allow to
separately process upward step length and downward step length
and support power control for poor quality; the earlier version does
not provide such functions.
(3) Other sites: All version neither allows to separately process
upward step length and downward step length, nor supports power
control for poor quality.
In Huawei II power control algorithm, the amplitude of power adjustment can be
computed in aspect of both level and quality of receiving signals, then the two results
are integrated to bring about the direction and step length of adjusting power control.
Power control
adjustment of
receiving Level
Power control
adjustment of
receiving quality
Power control adjustment of
Integrated level and quality
AdjStep_Lev AdjStep_Qul max(AdjStep_Lev,AdjStep_Qul)
AdjStep_Lev AdjStep_Qul No action
AdjStep_Lev No action AdjStep_Lev
AdjStep_Lev AdjStep_Qul AdjStep_Lev
AdjStep_Lev AdjStep_Qul max(AdjStep_Lev,AdjStep_Qul)
AdjStep_Lev No action AdjStep_Lev
No action AdjStep_Qul AdjStep_Qul
No action AdjStep_Qul AdjStep_Qul
No action No action No action
-
BTS Power Control Grade Uplink Quality Initiation Lower Threshold
Range: 1 16, 0dB 30dB Range: 0 7Unit Grade Unit Quality Grade
Default: 16 Default: 5
Description: Maximum of BTS dynDescription: In uplink power control, when the value of
Note larger than the initiation threshold, the actual Upli
BTS24 06.1111 or earlier versio Strength Upper Threshold will add the Uplink Poor Q
BTS3001C 07.0301 or earlier ver Deviation to the Level Upper Threshold. This action c
version, when pre-processing meincrease the expected level value of uplink power control.
configuration of Huawei II, the range of parameter is 2 16.Parameter not in this range may cause TRX configuration errors.
Above listed BTS versions or higher versions can support the
parameter from 1 to 16.
-
Uplink Poor Quality Deviation to the Level Upper Threshold
Range: 0 63Unit dB
Default: 0
Description: In uplink power control, when the value of uplink receiving qual
no less than that of the Uplink Quality Initiation Lower Threshold,
the actual Uplink Signal Strength Upper Threshold will add
the Uplink Poor Quality Deviation to the Level Upper Threshold.
increase the expected level value of uplink power control.
-
Downlink Quality Initiation Lower Threshold
Range: 0 7Unit Quality Grade
Default: 5
Description: In downlink power control, when the value of
quality is larger than the initiation threshold, the actu
Signal Strength Upper Threshold will add the Downlink
Quality Deviation to the Level Upper Threshold. This act
further increase the expected level value of uplink power
-
Uplink Poor Quality Deviation to the Level Upper Threshold
Range: 0 63Unit dB
Default: 0
Note
In downlink power control, when the value of downlink receiving
quality is no less than that of the Downlink Quality Initiation Lower
Threshold, the actual Downlink Signal Strength Upper Threshold
will add the Downlink Poor Quality Deviation to the Level Upper
Threshold.
-
CH Allocation Algorithm Idle SD Thrsh.N1 Cell SD Maximum
Range: Huawei I algorithms and Range: 0 63 Range: 0255Unit - Unit - Unit -
Default: Huawei II algorithms Default: 2 Default: 80
Description: Description: Description: The max
The channel allocation algorithWhen the number of idlNote: 1) The process
1) HW_I algorithm uses the sequ the Idle SD Thrsh.,timer Count is set for each cell. Every time a TCH is conv
channels. convert them to SDCCH an SDCCH, the Count is set to ResTime. Count is adjusted e
2) HW_II algorithm allocates chNote: seconds. If the current idle SDCCH channels > 8 +Idle TCH
Note HW_II algorithm is recommeThe conditions to Initthen: the Count minus 3. If the current idle SDCCH channel
above. 1)The number of idle SIdle TCH Thrsh., then plus 12 to Count, but the Count must
SD Thrsh". exceed ResTime. If the current idle SDCCH channels = 8 + I
2)The number of currenTCH Thrsh., then Count remains unchanged. After the adjust
or more than the numbeCount 0, then one TCH channel will be recovered.
3)The number of curren2) Due to TRX hardware processing capability restriction,
equal to "Cell SD maxitime slots can be configured as SDCCH channels for each TR
To initiate the TCH-to-SDCCH conversion, if the selected T
occupied, the connection will be handed over to other idle
channel in this cell. During dynamic SDCCH channel allocat
each time only one TCH is converted into SDCCH. So does th
SDCCH-to-TCH conversion.
3) During the TCH-to-SDCCH conversion, TCH channels on TRX
where BCCH is located should not be selected.
-
TCH Minimum Recovery Time(s) Idle TCH Thrsh. N1
Range: 603600 Range: 0255
Unit second Unit -
Default: 60 Default: 0
Description: The minimum interval for Description:
conversion. If the parameter "apply
timer Count is set for each cell. Every time a TCH is conv dynamic PDCHs are used as PDCHs, BSC can not apply to PCU for
an SDCCH, the Count is set to ResTime. Count is adjusted e any TCH.
seconds. If the current idle SDCCH channels > 8 +Idle TCH If the parameter "apply TCH decision period T(m)" is not 0, the tw
then: the Count minus 3. If the current idle SDCCH channel parameters determine when dynamic PDCH converts to TCH and
Idle TCH Thrsh., then plus 12 to Count, but the Count must when TCH converts dynamic PDCH. There is a count in every cell
exceed ResTime. If the current idle SDCCH channels = 8 + I and the range of count is from -T to T. The initial value of the c
TCH Thrsh., then Count remains unchanged. After the adjust is 0. The count adjust every minute. If idle TCH channels are more
Count 0, then one TCH channel will be recovered. than N1, the count add 1 and the maximum of the count is T. If idle
2) Due to TRX hardware processing capability restriction, TCH channels are no more than N1, the count reduce 1and the
time slots can be configured as SDCCH channels for each TR minimum of the count is -T. When the adjustive count value is less
To initiate the TCH-to-SDCCH conversion, if the selected T than T/2 and there is at least one dynamic PDCH which is used
occupied, the connection will be handed over to other idle PDCH, the BSC will apply to PCU for TCH.
channel in this cell. During dynamic SDCCH channel allocat On the other hand, after PCU applies to BSC for dynamic PDCH,
each time only one TCH is converted into SDCCH. So does th BSC must judge if the count value no less than T/2.Only when the
SDCCH-to-TCH conversion. count value is no less than T/2, it is allowed for the BSC to assign
3) During the TCH-to-SDCCH conversion, TCH channels on TRX dynamic PDCH to PCU.
where BCCH is located should not be selected.
-
Apply- TCH Decision Period T(m) TCH Traffic Thrsh(%)
Range: 065535 Range: 0-100
Unit minute Unit -
Default: 0 Default: 50
Description: The duration to judge whetherDescription:
performed. During the allocation of th
dynamic PDCHs are used as PDCHs, BSC can not apply to PCU for current channel reaches or
is allocated with the half
If the parameter "apply TCH decision period T(m)" is not 0, the tw allocate full rate channel
parameters determine when dynamic PDCH converts to TCH and Note:
when TCH converts dynamic PDCH. There is a count in every cell Cell channel occupation rat
and the range of count is from -T to T. The initial value of the c TCH/H/2)/ (Number of availa
is 0. The count adjust every minute. If idle TCH channels are more TCH/H/2)
than N1, the count add 1 and the maximum of the count is T. If idle
TCH channels are no more than N1, the count reduce 1and the
minimum of the count is -T. When the adjustive count value is less
than T/2 and there is at least one dynamic PDCH which is used
PDCH, the BSC will apply to PCU for TCH.
On the other hand, after PCU applies to BSC for dynamic PDCH,
BSC must judge if the count value no less than T/2.Only when the
count value is no less than T/2, it is allowed for the BSC to assign
-
Enhanced Chan. Convert Enable Resources with priority reserved
Range: Yes/No Range: Yes/No
Unit - Unit -
Default: Yes Default: Yes
Description: Description: When this function is enabled,
This parameter determines whether to alusers with priority are used.
to combine the call on the two SINGLE tNote: The TCHs reserved for the users with
timeslot to covert the call into TCHF wIf the parameter is configured No, the f
allocation. not allowed to be configured:
Note: Defining the highest priority ;
Couple: when one timeslot is divided in The number of TCHs reserved.
TCHHs are idle. The two TCHH are called Couple.
Single: when one timeslot is divided into two TCHHs, and one
TCHH is busy and the other is idle. The idle one is called Single.
-
Defining the highest priority The number of channels reserved
Range: 114 Range: 0-N
Unit - Unit: -
Default: 1 Default: 0
Description: Description: The number of the full rate T
Distinguish the user by this parameter. N is the number of full rate TCHs of the current cell.
user is not higher than this value, the Note: Make sure that the number of full rate TCHs reserved is no more
priority. Otherwise, the user is of lowthan that configured in the cell.
-
Apply TCHH priority for AMR AMR TCH Traffic Thrsh.(%)
Range: Selected, Not Selected Range: 0-99
Unit: - Unit: -
Default: Selected Default: 40
Description: Apply TCHH priority for Description:
N is the number of full rate TCHs of the current cell. When the current channel occupatio
Note: Make sure that the number of full rate TCHs reserved is no more the TCHHs are preferably assigned
AMR function.
Note: This threshold must be lower than the TCH Traffic Thrsh.
-
SD allocation priority allowed iInterf. Priority allowed
Range: Yes, No Range: Yes, No
Unit - Unit -
Default: Yes Default: Yes
Description: If the setting is "No", the Description: Indicates whether the
allocation. If the setting is "Yes", then the optimum selection is
adopted.
Note: This threshold must be lower than the TCH Traffic Thrsh.
-
Active Ch Inter. Meas. allowed Allocation TRX priority allowed
Range: Yes, No Range: Yes, No
Unit - Unit -
Default: Yes Default: Yes
Description: Indicates whether the inter Description: Whether the TRX priority is u
measured. If the setting "No", the system does not judge whether
the active channel is interfered, or sending interference indication
message. Otherwise, judgment will be made.
-
History records priority allowed Balance traffic allowed
Range: Yes, No Range: Yes, No
Unit - Unit _
Default: Yes Default: Yes
Description: Whether the history record pri Description: If the setting is
channel will be the starting ch
to be allocated.
-
Interf. of UL Level thrsh. Interf. of UL qual. Thrsh.
Range: 063, (-110 dBm -47 dBm) Range: 070, (RQ0RQ7)
Unit Grade Unit quality grade value
Default: 10 Default: 40
Description: Threshold of uplink stDescription: Threshold of uplink qu
channel is greater than this threshInterf. of UL level Thrsh. .
worse than or equal to the Interf. of UL Qual. Thrsh., then uplink
interference exists.
-
Interf. of DL Level Thrsh. Interf. of DL Qua. Thrsh.
Range: 063, (-110 dBm -47 dBm) Range: 070, (RQ0RQ7)
Unit Grade Unit quality grade value
Default: 25 Default: 40
Description: Threshold of downlink Description: Threshold of downlink
of a channel is greater than this tInterf. of DL level Thrsh..
quality is worse than or equal to the Interf. of DL Qual. Thrsh.,
then uplink interference exists.
-
Filter length for TCH Level Filter length for TCH Qual.
Range: 132 Range: 132
Unit - Unit -
Default: 6 Default: 6
Description: Used to filter the rece Description: Used to filter the rece
quality is worse than or equal to the Interf. of DL Qual. Thrsh.,
-
Filter length for SDCCH Level Filter length for SDCCH Qual.
Range: 132 Range: 132
Unit - Unit -
Default: 2 Default: 2
Description: Used to filter the receiviDescription: Used to filter the receivi
-
Update Period of CH Record Update Freq. Of CH record
Range: 11,440 Range: 063
Unit Minute Unit -
Default: 30 Default: 2
Description: In HW_II channel managDescription: The history record priority higher than the value of this parameter
(set by this parameter) expires, thwill be refreshed through subtracting the value of this parameter.
will be refreshed through subtract See the description of Update Period of CH record
CH record ". Thus the channel priority is raised. This parameter
together with the "Update Freq. of CH record works to prevent a
channel from being allocated again, which has been deteriorated for
a period of time.
-
Description: The history record priority higher than the value of this parameter
will be refreshed through subtracting the value of this parameter.
HANDOVERPWRCCHAN
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