GSM Idle Mode Parameter

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