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Transcript of 27 OMC Radio Parameters 104 Ok
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CBB_A04_E1
OMC Radio Parameters Introduction
ZTE University
CDMA-BSS Course Team
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Main Content
BSS Parameters
BTS Parameters
Cell Parameters
Carrier Parameters
Channel Parameters
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BSS Parameter
BSS Parameters
Forward Power Control Parameters
1X Forward Power Control
Parameters
Reverse Power Control Parameters
BSS Neighbor Cell
BSC Handoff Parameters
Gain Parameters
RLP Parameters
PTT SCH Parameters
Pay Phone Parameters
Special Number Parameters
Switch Parameters
There are twelve parameter tables in BSS grade.
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BSS Parameters
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BSS Parameters
MSC ID
Description :Switch ID.
Service provider specifies this parameter. The first 16 digits represent Market
ID. The last 8 digits represent the Switch number.
Value Range: 0 ~ 255.
Setting: Network operator maintains this parameter. It is unchangeable at
background.
MS MCC :Mobile Country Code
Value Range: 000~999
Default: 460
Description: It is the first three digits of the International Mobile Station Identity
(IMSI).
China = 460, USA = 310, Canada =302a, Singapore = 525.
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BSS Parameters
MS MNC: Mobile Network Code
Value Range: 00~99
Default: 03
Description: part of the IMSI.
MS IMSI_11_12 Value Range: 00~99
Default: 03
Description: the eleventh and twelfth digits of the IIMSI, when IMSI is 15 digitals
in lengthIMSI_11_12 is equal to MNC.
An IMSI that is 15 digits in length is called a class0 IMSI (the NMSI is 12
digits in length); an IMSI that is less than 15 digits in length is called a
class 1 IMSI (the NMSI is less than 12 digits in length).
IMSI Structure
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BSS Parameters
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BSS Parameters
Intercurrent Voice and data supported indicator
Value Range: 0, 1
Default: 0
Description: Indication of BS concurrent service beingsupported.
Packet data services zone id (Data service)
Value Range: 0255
Default: 1
Description: If the base station supports a packet data
service zone, the base station shall set this field to itsnon-zero packet data services zone identifier. If thebase station does not support a packet data servicezone, the base station shall set this field to 0.
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BSS Parameters
Soft leg supported number
Value Range: 1~6
Default: 4 Description: If soft leg supported number is too high,
CE resource is wasted, and forward capacity is reduced.
If soft leg supported number is too low, useful pilots
cannot be added into active set. Service quality
declines. Reverse interference increases. But CE
resource and forward capacity is saved.
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BSS Parameter
BSS Parameters
Forward Power Control Parameters
1X Forward Power Control Parameters
Reverse Power Control Parameters
BSS Neighbor Cell
BSC Handoff Parameters
Gain Parameters
RLP Parameters
PTT SCH Parameters
Pay Phone Parameters
Special Number Parameters
Switch Parameters
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Forward Power Control Parameters
This is for CSM1500
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BSS Parameter
BSS Parameters
Forward Power Control Parameters
1X Forward Power Control Parameters
Reverse Power Control Parameters
BSS Neighbor Cell
BSC Handoff Parameters
Gain Parameters
RLP Parameters
PTT SCH Parameters
Pay Phone Parameters
Special Number Parameters
Switch Parameters
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1X Forward Power Control Parameters
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1X Forward Power Control Parameters
MS Power control step size1/2/3
Value Range: 0~2
Default: MS Power control step size 1:0
MS Power control step size 2:1 MS Power control step size 3:2
Description: Step length of reverse close loop power control (1 leg, 2
or more legs). In terms of power control bits in power control
subchannel, MS adjusts transmission power according to this step
length.
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BSS Parameter
BSS Parameters
Forward Power Control Parameters
1X Forward Power Control Parameters
Reverse Power Control Parameters
BSS Neighbor Cell
BSC Handoff Parameters
Gain Parameters
RLP Parameters
PTT SCH Parameters
Pay Phone Parameters
Special Number Parameters
Switch Parameters
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This is for reverse closed
Power control setpoint
For example:
13000: 21-13=8 dB
Reverse Power Control Parameters
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BSS Parameter
BSS Parameters
Forward Power Control Parameters
1X Forward Power Control Parameters
Reverse Power Control Parameters
BSS Neighbor Cell
BSC Handoff Parameters
Gain Parameters
RLP Parameters
PTT SCH Parameters
Pay Phone Parameters
Special Number Parameters
Switch Parameters
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BSS Neighbor cell
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BSS Neighbor cell
Press here, system will
jump this windows.
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Neighbor cell parameters
Global neighbor cell ID Value Range: 0~1023
Default: -
Description: Global neighbor cell Id is generated by backgroundautomatically. It is unchangeable.
Global neighbor cell type
Value Range: 0,1
Default: - Description: There is or there isnt relationship between BSC of local
cell and BSC of neighbour cell. Not Protocol Filed.
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Neighbor cell parameters
CI Discriminator: Neighbor cell discrimination mode.
Value Range: 1,2,5,7
Default: 2
Description: Not Protocol Filed.
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Neighbor cell parameters
MarketId: (A unique market identity provided by aservice provider )
Value Range: 0~65535
Default:-
Description: When the CI Discriminatorisnt 7,Location, Market Id and Switch Number are inactivated.
SwitchNumber
Value Range: 0~255
Default: -
Description: used to uniquely identify a specialswitching center in a group of switching centers underthe same Market ID. when CI_Discriminator equals to 7,SwitchNumber is valid and used to construct MSCID.
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BSS Parameter
BSS Parameters
Forward Power Control Parameters
1X Forward Power Control Parameters
Reverse Power Control Parameters
BSS Neighbor Cell
BSC Handoff Parameters
Gain Parameters
RLP Parameters
PTT SCH Parameters
Pay Phone Parameters
Special Number Parameters
Switch Parameters
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BSC Handoff Parameters
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BSC Handoff Parameters
Hard handoff support RC3 and up indicator .
Value Range: 0,1
Default: 1
Description: Indication of 1X hard handoff being
supported. If not support, the MS of RC3 or above are
treated as IS-95 MS. This parameter is used in hard
handoff with disconnected BSC.
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BSC Handoff Parameters
Parameters as Search window are default .
Value Range: 0,1
Default: 0
Description: Indication of set the parameters such as
search window and etc. in default. This parameter is
used in hard handoff with disconnected BSC.
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BSC Handoff Parameters
SOWD and TOWD include hardware delay
Value Range: 0,1
Default: 1
Description: SOWD and TOWD contain hardware delay
indication. This parameter is used in the hard handoff
with disconnected BSC.
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BSS Parameter
BSS Parameters
Forward Power Control Parameters
1X Forward Power Control Parameters
Reverse Power Control Parameters
BSS Neighbor Cell
BSC Handoff Parameters
Gain Parameters
RLP Parameters
PTT SCH Parameters
Pay Phone Parameters
Special Number Parameters
Switch Parameters
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BSS Parameter
Gain ParametersRLP Parameters
PTT SCH Parameters
Pay Phone Parameters
Special Number Parameters
Switch Parameters
In the most of the conditions, the default value
is used in these parameter tables.
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Main Content
BSS Parameters
BTS Parameters
Cell Parameters
Carrier Parameters
Channel Parameters
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BTS Parameters
The parameters
of this table are
used for EV-DO
service!
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BTS Parameters
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1X Forward Power Control
Parameters/Switch Parameters
Forward power uprise step size(1/2/3 leg)
Value Range: 1 ~ 7. The unit is 0.25dB
Default: Forward power uprise step size(1 leg) = 4
Forward power uprise step size(2 leg) = 2
Forward power uprise step size(3 leg) = 1
Description: Forward power control uprising step length. If the power
control step length is set too high, the forward quick power control
response time is short, but the stable state power deviation is high. Ifthe power control step length is set too low, the stable state power
deviation is low, but the forward quick power control response time is
long.
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1X Forward Power Control
Parameters/Switch Parameters
Forward power down step size(1/2/3 leg)
Value Range: 1 ~ 7. The unit is 0.25dB
Default: Forward power down step size(1 leg) = 4
Forward power down step size(2 leg) = 2
Forward power down step size(3 leg) = 1
Description: Forward power control descending step length. If the
power control step length is set too high, the forward quick power
control response time is short, but the stable state power deviation is
high. If the power control step length is set too low, the stable state
power deviation is low, but the forward quick power control response
time is long.
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BTS Parameters
Power
The powerassigned by BTS
to a subscriber.
Maximum
Minimum
Initial
These two parameters
decide Maximum
threshold and
Minimum threshold
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1X Forward Power Control
Parameters/Switch Parameters
RCC2 FCH initial power (voice)
Value Range: 163~203. The unit is DGU
Default: 179
Description: RC3/4/5 voice service F-FCH initial transmitting power. If
the initial transmitting power is set too high, F-FCH initial transmitting
power is high, and the MS is easier to receive information correctly
(Frame Error Rate is low), but the forward capacity is lowered when
the channel is established. If the initial transmitting power is set too
low, F-FCH initial transmitting power is low, and the MS may receive
wrong information (Frame Error Rate is high), but the forward power
resource is saved.
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1X Forward Power Control
Parameters/Switch Parameters
Nominal transmit power for voice (1/2/3 leg)
Value Range: 1~255. The unit is DGU
Default: Nominal transmit power for voice (1 leg) = 169
Nominal transmit power for voice (2 leg) = 175
Nominal transmit power for voice (3 leg) = 171
Description: Voice service nominal power.
Power region for voice (1/2/3 leg)
Value Range: 1~255. The unit is DGU
Default: Power region for voice (1 leg) = 80
Power region for voice (2 leg) = 40
Power region for voice (3 leg) = 32
Description: Voice service power variation region.
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Main Content
BSS Parameters
BTS Parameters
Cell Parameters
Carrier Parameters
Channel Parameters
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
SCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor Frequency
ECAM Information Repeat Parameters
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Cell Parameter
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Cell Parameter
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Cell Parameter
System Identification: SID
Value Range: 0~32767
Default:-
Description: A number uniquely identifying a wireless system.
Network Identification: NID Value Range: 0~65534
Default: -
Description: number that uniquely identifies a network withina cellular system.
Location Area Code: LAC
Value Range: 0~65535
Default: -
Description:A toll area may include many LACs, different tollareas have different LACs.
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Cell Parameter
Cell Identity : CI Value Range: 0~65535
Default:-
Description: Each cell has a unique CI.
Pilot PN sequence offset: PILOT_PN
Value Range: 0~511
Unit: 64PN chip
Description: Protocol Field.
Pilot PN sequence offset index increment: PILOT_INC
Value Range: 0~15
Unit: 64PN chip
Default: 4
Description: Protocol Field.
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Searcher Window Sizes
Cell Parameter
Search window size for the Active Set and Candidate Set:SRCH_WIN_A
Value Range: 0~15
Default:6
Search window size for the Neighbor Set: SRCH_WIN_N
Value Range:0~15
Default:8
Search window size for the Remaining Set: SRCH_WIN_R
Value Range: 0 ~15
Default: 0
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
SCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor Frequency
ECAM Information Repeat Parameters
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System Parameter
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System Parameter
Registration zone: REG_ZONE Value Range: 0~4095 Default:0
Description: Register zone refers to the base station groupwithin a specified system/network. The zone for a BS isspecified in the REG_ZONE field. One MS can be registeredin more than one zone. The unique SID and NID for the zone
can be added through a REG_ZONE. In consideration ofpaging by LAC, the REG_ZONE should correspond to LAC .
Number of registration zones to be retained:TOTAL_ZONES Value Range: 0~7
Default:2
Description: By sending Total_Zones (the total number ofstorable zones in the zone table) field in the system parametermessage, a BTS can control the maximum number ofregistered zones of the registered zone table.
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
SCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor Frequency
ECAM Information Repeat Parameters
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Power Control Reporting Parameter
For forward slow power
Control.
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
SCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor Frequency
ECAM Information Repeat Parameters
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Handoff Parameter
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IS-95 Soft Handoff algorithm
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Handoff Parameters
Pilot detection threshold: T_ADD
Value range: 0 ~ 47 Default: 26 Unit: -0.5db
Description: be used to trigger a mobile station to send a pilot signalstrength measurement message to start the handoff process.
Pilot drop threshold: T_DROP
Value range: 0 ~ 47 Default: 30 Unit: -0.5db
Description: be used to trigger a mobile station to send a pilot signalstrength measurement message to start the handoff drop process.
Active Set versus Candidate Set comparison threshold: T_COMP
Value range: 0 ~ 15 Default: 5 Unit: 0.5dB
Description: be used to control the transfer of pilot signals from the
candidate set to the active set.
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Time Corresponding to the Configured T_TDROP Value
T_Tdrop Time (seconds) T_Tdrop Time (seconds)
0 0.1 8 27
1 1 9 39
2 2 10 55
3 4 11 79
4 6 12 112
5 9 13 159
6 13 14 225
7 19 15 319
Handoff Parameters
Drop timer value: T_TDROP
Value range: 0 ~ 15 Default: 3
Description: If the pilot signal is in the candidate pilot signal set and also if
the time when its strength is less than T_DROP continuously exceeds
T_TDROP, the pilot signal will be transferred to the neighbor pilot signal set.
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IS-2000 Soft Handoff algorithm
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Dynamic Add Threshold: [(SOFT_SLOPE/8)10log10(PS1) + ADD_INTERCEPT/2]Dynamic Drop Threshold : [(SOFT_SLOPE/8)10log10(PS2) + DROP_INTERCEPT/2]
IS-2000 Soft New Parameters
Slope in the inequality criterion for adding or dropping a pilot :SOFT_SLOPE
Value range: 0 ~ 63 Default: 0 Unit: -
Description: Soft handoff slope .
Intercept in the inequality criterion for adding a pilot to Active Set:ADD_INTERCEPT
Value range: 0 ~ 63 Default: 26 Unit: -0.5dB
Description: Add soft handoff intercept.
Intercept in the inequality criterion for dropping a pilot from theActive Set: DROP_INTERCEPT
Value range: 0 ~ 63 Default: 30 Unit: -0.5dB
Description: Drop soft handoff intercept .
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
SCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor Frequency
ECAM Information Repeat
Parameters
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Reverse Link Overload Parameter
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Reverse Link Overload Parameter
Reverse Power Control Mode:
Value range: 0 ~ 4 Default: 3
Description: Reverse overload control mode.
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Reverse Link Overload Parameter
RC2/RC3/RC4/RSCH Correction Factor
Value range: 0 ~ 32767
Unit: 1/1000
Description: The equivalent user mode will calculate the
reverse load via converting all reverse service channels
into 8 K voice R-FCH under RC1. This set of
parameters will convert R-FCH of RC1, RC3 and RC4,different target FERs and coding mode (volume or
TURBO) R-SCH into the correction factor for 8 K voice
R-FCH under RC1.
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
SCH rate Parameter
Redirect Message Parameters
Link Cell
Neighbor Frequency
ECAM Information Repeat Parameters
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We can control RSCHrate by setting the
parameters of this table
SCH Rate Parameter
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
SCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor Frequency
ECAM Information Repeat Parameters
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The system uses
these parameters to
control MS how to
select carrier!
Redirect Message Parameters
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
SCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor Frequency
ECAM Information Repeat Parameters
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Link Cell
Add neighbor PN
According to designing.
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
RSCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor frequency
ECAM Information Repeat Parameters
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Neighbor frequency
Add neighbor PN for
Handoff between carriers.
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Cell Parameter
Cell Parameter
System Parameter
Power Control Reporting Parameter
Handoff Parameter
Reverse Link Overload Parameter
RSCH Rate Parameter
Redirect Message Parameters
Link Cell
Neighbor frequency
ECAM Information Repeat Parameters
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ECAM Information Repeat Parameters
We can adjust
how to repeatECAM here.
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Main Content
BSS Parameters
BTS Parameters
Cell Parameters
Carrier Parameters
Channel Parameters
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Carrier Parameter
Carrier Parameter
Global Redirect Message Parameters
PTT SCH Power Control Parameters
Neighbor Cell List
Access Parameter
Power Control Message Parameter
Forward Power Overload Parameter
Periodic Pilot Measurement Request Order
Traffic Parameter
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Carrier Parameter
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Carrier Parameter
We can use these
two parameters
to balance traffic
for multiple
carrier.
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Carrier Parameter
QPCH support indicator: QPCH_SUPPORTED Value range: 0: not supported, 1: supported
Default: 0
Description: QPCH is a new control channel in the 1Xsystem compared with the IS95 system, which can only
work above RC3.
Nominal transmit power offset
Value range: 0~15, corresponding to8 -~ 7 (db)respectively
Default: 0
Description: Nominal transmit power offset, expressedin binary supplemental code. This parameter and theparameter Extended nominal transmit power are usedin the open loop power control of reverse links.
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Carrier Parameter
For carrier handoff
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Carrier Parameter
Carrier Parameter
Global Redirect Message Parameters
PTT SCH Power Control Parameters
Neighbor Cell List
Access Parameter
Power Control Message Parameter
Forward Power Overload Parameter
Periodic Pilot Measurement Request Order
Traffic Parameter
C i P
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Carrier Parameter
Just default!
C i P t
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Carrier Parameter
Carrier Parameter
Global Redirect Message Parameters
PTT SCH Power Control Parameters
Neighbor Cell List
Access Parameter
Power Control Message Parameter
Forward Power Overload Parameter
Periodic Pilot Measurement Request Order
Traffic Parameter
N i hb C ll Li t
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Neighbor Cell List
Attention the relationship with
The cell neighbor list!
Carrier neighbor
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Carrier Parameter
Carrier Parameter
Global Redirect Message Parameters
PTT SCH Power Control Parameters
Neighbor Cell List
Access Parameter
Power Control Message Parameter
Forward Power Overload Parameter
Periodic Pilot Measurement Request Order
Traffic Parameter
A P t
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Access Parameter
A P t
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Access Parameter
A P bi
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Request Message ready
for transmission
Sequence 2 Sequence 3Access ProbeSequence 1
Access Channel
Request Attempt
Sequence MAX_RSP_SEQ
(15max)
System Time
RS PD RS
Access Probe
1+NUM_STEP
(16 max)
PD PD
Access Probe 3PI
PI
IP
RT TATA RT TA
Select access channel Initial Power
System Time
Access Probe
2Access Probe
1
PD =0 for
ResponseMessage Access Procedure
is depending on the
Access parameter.
Access Probing
Access Parameter
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Access Parameter
NUM_STEP, PWR_STEP and INIT_PWR function simultaneously in the
access attempt sequence of an MS.
INIT_PWR :Initial power offset of access
Unit: dB
Value range: -16 ~ 15 Default: 0
PWR_STEP :Power increment
Unit: dB
Value range: 0 ~ 7 Default: 3
NUM_STEP :Number of access trials
Value range: 0 ~ 15 Default: 6
Description: The maximum number of access probe to be transmitted.
Access Parameter
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Access Parameter
MAX_CAP_SZ Unit: Frame Value range: 0 ~ 7 Default: 3
Description: Maximum Access Channel message capsule size. 3 less thanthe maximum number of Access Channel frames in an Access Channelmessage capsule.
PAM_SZ Unit: Frame
Value range: 0 ~ 15 Default: 3
Description:Access Channel preamble length. 1 less than the number ofAccess Channel frames that mobile stations are to transmit in each AccessChannel preamble.
Access Parameter
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Access Parameter
PROBE_BKOFF Value Range: 0~15 Default:0
Description: The next access probe is transmitted after an additional
backoff delay, RT, from 0 to 1+PROBE_BKOFF slots.
RT = 0 ~ [PROBE_BKOFF +1] slots
BKOFF
Value Range: 0~15 Default:0
Description: For every access probe sequence, a backoff delay, RS,from 0 to 1+BKOFF slots is generated pseudorandomly.
RS = 0 ~ [BKOFF +1] slots
Access Parameter
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-1ANPROBE_PN_R2~0
Access Parameter
ACC_TMO
Unit: 80ms
Value Range: 0~15 Default:3
Description:After sending the access probe, The MS shall wait ACKas much as this time before transmitting next access probe
TA = (2 + ACC_TMO) * 80ms
PROBE_PN_RAN:
Value Range: 0~9 Default:0
Description: Time randomization for access channel probes.To avoidcollision among the MS to try call access at the same time:
PN randomization delay = (PN chip)
Carrier Parameter
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Carrier Parameter
Carrier Parameter
Global Redirect Message Parameters
PTT SCH Power Control Parameters
Neighbor Cell List
Access Parameter
Power Control Message Parameter
Forward Power Overload Parameter
Periodic Pilot Measurement Request Order
Traffic Parameter
Power Control Message Parameter
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Power Control Message Parameter
Power Control Message Parameter
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Power Control Message Parameter
Forward Power Control
Operation Mode Indicator
Value Range: 0~6
Default:0
Description: Indication
of forward power control
operation mode of F-
FCH where there is no
F-SCH.
Carrier Parameter
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Carrier Parameter
Carrier Parameter
Global Redirect Message Parameters
PTT SCH Power Control Parameters
Neighbor Cell List
Access Parameter
Power Control Message Parameter
Forward Power Overload Parameter
Periodic Pilot Measurement Request Order
Traffic Parameter
Forward Power Overload Parameter
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Forward Power Overload Parameter
Forward Power Overload Parameter
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Forward Power Overload Parameter
Rating Power: RATING_PWR Unit: Milliwatt
Value: 0~30000
Description: The parameter refers to the rated power of HPA ,
Provided by network planning .
Cell Power design value: CELL_PWR
Unit: Milliwatt
Value: 0~30000
Description: Designed power of the cell.
Carrier Parameter
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Carrier Parameter
Carrier Parameter
Global Redirect Message Parameters
PTT SCH Power Control Parameters
Neighbor Cell List
Access Parameter
Power Control Message Parameter
Forward Power Overload Parameter
Periodic Pilot Measurement Request Order
Traffic Parameter
Periodic Pilot Measurement Request Order
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For carrier handoff
Periodic Pilot Measurement Request Order
Carrier Parameter
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Carrier Parameter
Carrier Parameter
Global Redirect Message Parameters
PTT SCH Power Control Parameters
Neighbor Cell List
Access Parameter
Power Control Message Parameter
Forward Power Overload Parameter
Periodic Pilot Measurement Request Order
Traffic Parameter
Traffic Parameter
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Traffic Parameter
CE search window
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Main Content
BSS Parameters
BTS Parameters
Cell ParametersCarrier Parameters
Channel Parameters
Channel Parameters
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Channel Parameters
Pilot Channel
Synchronous Channel
Paging Channel
Access Channel
Configuring Pilot Channel
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Configuring Pilot Channel
Configuring Pilot Channel
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Configuring Pilot Channel
ModuleId Value range:
Default: 1
Description: Module where the Pliot channel is located,The
parameter has influence upon cell coverage.
ElementId
Value range: 0 ~ 35
Default: 0
Description: Element where the pilot channel is located. The
parameter has influence upon cell coverage.
Pilot channel gain
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40 255INPILOTCH_GA10_ PWRCELLmWPilotPower
Pilot channel gain
Unit: (X-255)/4
Value range: 0 ~ 255 Default: 225 Description : Provided by network planning, generally
according to the default value.
Suppose the configuration value is X, the corresponding dBvalue is (x-255)/4. For example, if Pilot_gain is set to 225, the
corresponding dB value is (225-255)/4 = -7.5dB.
The Synchronous Channel, Paging Channel and AccessChannel are similar to this.
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