10/12/2014
GSM Idle Mode Parameter | Telecom Training GSM, WCDMA & LTE
GSM Idle Mode Parameter
18th April
Ericsson
Parameter
Description
Range
Dafault
Remarks
Value
A low value of ACCMIN means that the
Minimum received signal level
ACCMIN
in dbm at the MS for
permission to access the
47 to 110
dBm
coverage in idle mode is improved at the
- 110 dBm
number of call setup failures. formula is C1
system
Maximum transceiver power
CCHPWR
level an MS may use when
accessinf on a control channel
Cell Reselection Hysteresis -
CRH
receiving signal strength
hysteresis
expense of the risk of having an increased
= (rxlev −ACCMIN) −max (CCHPWR −P, 0)
13 to 43
(GSM900)
4 to 30
(GSM1800)
33
30
CCHPWR is the cell parameter that
indicates the maximum transmitting power
that an MS is allowed to use when accessing
the system.
C1(N) > C1 + CRH ( this parameter is
0 to 14 in
steps of 2db
6
applicable for location area boundary cell
and for reducing of unwanted ping-pong
singnailing paging)
Up to 8 NCCs can be defined, defined the
NCCPERM
PLMM (NCC) Permitted -
0 to 7
1, 4, 6
allow NCCs (Network Colour Code) on the
BCCH carriers for which the MS is
permitted to send measurement reports
Cell Bar Access Defines
whether the cell is barred for
CBA Or CB
access or not. NO: The cell is
The CBA bit is a parameter for the network
Yes, No
No
operator to set. Usually all the cells are
allowed to be accessed by MS,
not barred for access. YES :
The cell is barred for access.
CBQ
Cell Bar Qualify
HIGH, LOW
HIGH
- HIGH: The cell has high priority; LOW:
The cell has low priority
Cell Reselection Offset defines an offset to
CRO
encourage or discourage MSs
The setting of this parameter will only
0 to 63 [0 dB
to 126 dB in
to select the cell while it is
steps of 2
camping on another cell, eg:
dB)
0
affect phase 2 MSs C2 = C1 + CRO − TO *
H(PT − T) for PT ≠ 31
C2 = C1 − CRO for PT = 31
perforam a cell reselection
Temporary Offset - defines a
TO
negative offset applied to
CRO
Penalty time - defines
PT
duration for which TO is
applied
0 to 7 [0 dB
to infinite dB
in steps of 10
0
The setting of this parameter will only
affect phase 2 MSs
dB]
0 to 31 [0 sec
to 620 sec in
steps of 20
0
The setting of this parameter will only
affect phase 2 MSs
sec]
0 to 255 deci
T3212
Defines the time-out value
hours
that controls the location
[Infinite time
updating procedure,
40
0= Infinite time , 1= 6 min and 2= 12min , …
out to 25.5
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10/12/2014
GSM Idle Mode Parameter | Telecom Training GSM, WCDMA & LTE
hours]
NO : MSs in the cell are not allowed to
apply IMSI attach and detach. YES: MSs
in the cell should apply IMSI attach and
ATT
attach- detach allow
Yes, No
YES
detach. ATT tells the MS if it is allowed
to apply IMSI attach and detach, i.e. if the
MS is allowed to send a message to the
system every time it is turned on or off
Defines maximum number of
MaxRet
Maximum retransmissions
1, 2, 4, 7
4
retransmissions an MS may do when
accessing the system on RACH.
Defines which access classes that are
barred. Up to 16 access classes can be
defined. Class 10 defines emergency call in
ACC
0 to 15,
Access Control Class
CLEAR
the cell. 0 to 9 : Access classes that are
clear
barred.
10 : Emergency call not allowed for MSs
belonging to classes 0 to 9.
11 to 15 : Access classes that are barred.
& CLEAR: No access classes are barred.
BA List
SIMSG
In idle mode are used for cell reselection
Absolute RF channel number
and In active mode are used for sending
for measurement on BCCH.
System Information BCCH
Message
NBR data by sacch.
1, 7, 8
Posted 18th April by Narendra Neeraj
Labels: GSM
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