A configuration command that modifies the basic call control parameters of a cell. In this command, the following parameters uniquely identify the cell:
Cell Index or Cell Name
For BTS20, BTS22C, BTS3001C, BTS3001CP, and BTS3002C, the value of the following parameters cannot be modified: AFR SACCH Multi-Frames, AFR Radio Link Timeout, AHR SACCH Multi-Frames, AHR Radio Link Timeout.
| ID | Name | Description |
|---|---|---|
| IDXTYPE | Index Type | Meaning:Index Type Value range:BYNAME(By Name),BYIDX(By Index) Explanation:Index Type. Default value:None |
| CELLIDX | Cell Index | Meaning:Cell Index Value range:0~2047 Explanation: This parameter indicates the source cell index. The source cell index must be unique. Default value:None |
| CELLNAME | Cell Name | Meaning:Cell Name Value range:1-32 characters Explanation: This parameter indicates the name of the source cell. The name of each cell under one BSC must be unique. Default value:None |
| SAMULFRM | SACCH Multi-Frames[SACCH period 480ms] | Meaning:SACCH Multi-Frames[SACCH period 480ms] Value range:0~63 Explanation:This parameter is used by the BTS to inform the BSC of radio link connection failure. When the BTS receives the SACCH measurement report from the MS, the counter for determining whether a radio link is faulty is set to the value of this parameter. Each time the BTS fails to decode the SACCH measurement report sent by the MS, the counter decreases by 1. If the BTS successfully decodes the SACCH measurement report, the counter increases by 2. When the value of the counter is 0, the radio link fails.The BTS sends a connection failure indication message to the BSC.The number of SACCH multi-frames and the radio link failure counter in the system message specify the radio link failure time on the uplink and that on the downlink respectively. The judgment standard is whether the SACCH message is correctly decoded. Default value:None |
| RACHBUSYTHRED | RACH Busy Threshold | Meaning:RACH Busy Threshold Value range:0~63 Explanation:For the BTS3X series and double-transceiver BTSs, this parameter specifies the level threshold for the MS random access when the BTS determines the RACH busy state. When the receive level of the random access burst timeslot is greater than this threshold, the BTS considers that the timeslot is busy. For the BTS3X series and the double-transceiver BTSs, this parameter only indicates whether the timeslot is busy. The threshold setting does not affect the normal access of the MS. For the BTS2X series (excluding the BTS24), this parameter specifies the level threshold for the BTS to determine an MS random access.When the receive level of the random access burst timeslot is greater than this threshold and the access demodulation is successful, the BTS considers that the timeslot is busy and determines whether the RACH access is valid based on the parameter Random Access Error Threshold. For the BTS2X, the parameter RACH Busy Threshold is used to determine whether the timeslot is busy. In addition, the parameter affects the normal access of the MS. The MS access is allowed only when the level of the MS random access burst is greater than the RACH Busy Threshold. For the BTS24, this parameter has two functions. One function is indicating the level threshold of the MS random access for the system to determine the RACH busy state. When the receive level of the random access burst timeslot is greater than this threshold, the BTS considers that the timeslot is busy. The other function is indicating whether the MS access is allowed.The MS access is allowed only when access level (including random access and handover access) is greater than the threshold. Default value:None |
| PAGTIMES | Paging Times | Meaning:Paging Times Value range:1~8 Explanation:This parameter specifies the total number of paging times. The parameter and the paging times configured on the MSC side together determine the number of retransmissions of the paging message. The total paging times is approximately equal to this parameter multiplied by the paging times configured on the MSC side. At present, the Paging Times is set to 4 in the MSC. The BSC does not support the mechanism for resending the paging message; therefore, it processes a paging message each time it receives the paging message. The BTS2X, BTS3X, and double-transceiver BTS support paging retransmission. Default value:None |
| ASSLOADJUDGEEN | Assignment Cell Load Judge Enable | Meaning:Assignment Cell Load Judge Enable Value range:DISABLE(DISABLE),ENABLE(ENABLE) Explanation:When Assignment Cell Load Judge Enabled is set to Yes, the directed retry procedure is started if the following two conditions are met: The cell supports directed retry. The load of the cell is greater than or equal to Cell Directed Retry Forbidden Threshold. Default value:None |
| DTLOADTHRED | Directed Retry Load Access Threshold | Meaning:Directed Retry Load Access Threshold Value range:0~100 Explanation:This parameter is used to adjust candidate target cells for directed retry. When target cells are selected during directed retry, only the cells whose loads are smaller than or equal to the Directed Retry Load Access Threshold are selected as candidate target cells. Default value:None |
| AFRSAMULFRM | AFR SACCH Multi-Frames | Meaning:AFR SACCH Multi-Frames Value range:0~63 Explanation:This parameter specifies the number of SACCH multi-frames under full-rate AMR calls. For details, see the description of SACCH multi-frames. Default value:None |
| AHRSAMULFRM | AHR SACCH Multi-Frames | Meaning:AHR SACCH Multi-Frames Value range:0~63 Explanation:This parameter specifies the number of SACCH multi-frames under half-rate AMR calls. For details, see the description of SACCH multi-frames. Default value:None |
| AFRDSBLCNT | AFR Radio Link Timeout | Meaning:AFR Radio Link Timeout Value range:4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64 Explanation:This parameter specifies the value of Radio Link Timeout under full-rate AMR calls. For details, see Radio Link Timeout (SACCH period(480ms)). Default value:None |
| AHRDSBLCNT | AHR Radio Link Timeout | Meaning:AHR Radio Link Timeout Value range:4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64 Explanation:This parameter specifies the value of Radio Link Timeout under half-rate AMR calls. For details, see Radio Link Timeout (SACCH period(480ms)). Default value:None |
| MSMAXRETRAN | MS MAX Retrans | Meaning:MS MAX Retrans Value range:1_Times(1_Times),2_Times(2_Times),4_Times(4_Times),7_Times(7_Times) Explanation:This parameter specifies the maximum number of Channel Request messages that can be sent by an MS in an immediate assignment procedure. After the MS initiates the immediate assignment procedure, it always listens to the messages on the BCCH and all the common control channels (CCCHs) in the CCCH group to which the MS belongs.If the MS does not receive Immediate Assignment messages or Immediate Assignment Extend messages, the MS re-sends Channel Request messages at a specified interval. Default value:None |
| COMMACC | Common Access Control Class | Meaning:Common Access Control Class Value range:L0_FORBID(0),L1_FORBID(1),L2_FORBID(2),L3_FORBID(3),L4_FORBID(4),L5_FORBID(5),L6_FORBID(6),L7_FORBID(7),L8_FORBID(8),L9_FORBID(9) Explanation:This parameter specifies whether to allow the MSs of common access classes to access the network. This parameter is used for load control. Value 1 indicates that access is not allowed. Value 0 indicates that access is allowed.For example, 0000000001 indicates that the MSs of all classes except class 0 are allowed to access the network. During the BTS installation, activation, or cell maintenance test, this parameter can be set to 1. All MSs are not allowed to access the network, thus reducing the impact on installation or maintenance. In the cell where the traffic volume is heavy, congestion may occur in busy hours. For example, more RACH burst occurs, the AGCH is overloaded, or the Abis interface is overloaded.If this parameter is set to 1 for the MSs of some classes, the traffic volume in this cell may be reduced. Default value:None |
| SPECACC | Special Access Control Class | Meaning:Special Access Control Class Value range:L11_FORBID(11),L12_FORBID(12),L13_FORBID(13),L14_FORBID(14),L15_FORBID(15) Explanation:This parameter specifies whether to allow the MSs of special access classes to access the network. This parameter is used for load control. Value 1 indicates that access is not allowed. Value 0 indicates that access is allowed. For example, 000001 indicates that users of all classes except class 10 are allowed to access the network. In the cell where the traffic volume is heavy, congestion may occur in busy hours. For example, more RACH burst occurs, the AGCH flow is overloaded, or the Abis interface flow is overloaded.If this parameter is set to 1 for the MSs of some classes, the traffic volume in this cell may be reduced. Default value:None |
| ERGCALLDIS | Emergent Call Disable | Meaning:Emergent Call Disable Value range:NO(NO),YES(YES) Explanation:This parameter specifies whether to allow emergency calls. For MSs whose access class is from 0 to 9, if this parameter is set to No, emergency calls are allowed. For MSs whose access class is from 11 to 15, emergency calls are not allowed only when the access control bit is set to 0 and Emergent Call Disable is set to Yes. Default value:None |
| RLT | Radio Link Timeout[SACCH period 480ms] | Meaning:Radio Link Timeout[SACCH period 480ms] Value range:4,8,12,16,20,24,28,32,36,40,44,48,52,56,60,64 Explanation:This parameter specifies when an MS disconnects a call if the MS unsuccessfully decodes the SACCH message. For details of this parameter, see GSM Rec. 0408 and 05.08. Once a dedicated channel is assigned to the MS, the counter S is enabled and the initial value is set to this parameter value. Each time an SACCH message is not decoded, the counter S decreases by 1. Each time an SACCH message is correctly decoded, the counter S increases by 2.When the counter S is equal to 0, the downlink radio link is considered as failed.Therefore, when the voice or data quality is degraded to an unacceptable situation and it cannot be improved through power control or channel handover, the connection is to be re-established or released. Default value:None |
| ECSC | ECSC | Meaning:ECSC Value range:NO(NO),YES(YES) Explanation:The early classmark sending control (ECSC) specifies whether the MSs in a cell use early classmark sending. For details, see GSM Rec. 04.08.After a successful immediate assignment, the MS sends additional classmark information to the network as early as possible. The CM3 (classmark 3) information contains the power information of each band of multi-band MSs. In the inter-band handover, power class must be correctly described. When paging is made or the BA2 table is sent between different bands, the CM3 message must be known. For dual-band MSs, if ECSC is set to No, the MSC sends a CLASSMARK REQUEST message after the MS reports an EST IND message. The MS then reports the CLASSMARK UPDATE message. The connection time of the MS is affected. Default value:None |
| MBR | Multi-band report | Meaning:Multi-band report Value range:0~3 Explanation:This parameter is used for the MS to report neighbor cell explanation of multiple bands. It is sent in the system information 2ter and 5ter. Default value:None |
| REASSEN | Allow Reassign | Meaning:Allow Reassign Value range:NO(NO),YES(YES) Explanation:This parameter specifies whether to allow the reassignment function. Default value:None |
| EMLPPEN | Allow eMLPP | Meaning:Allow eMLPP Value range:NO(NO),YES(YES) Explanation:This parameter specifies whether to allow the enhanced multi-level precedence and preemption (eMLPP) function. In eMLPP, the network can use different policies such as queuing, preemption, and directed retry based on the priorities of different calls when network resources are occupied. If the Allow eMLPP is set to Yes, when preemption occurs, the MS with the lowest priority performs handover, and the MS with higher priority seizes the idle channel after handover. If the Allow eMLPP is set to No, a certain MS with lower priority releases the channel, the MS with higher priority seizes the idle channel after release. Default value:None |
| ABISRESADJTCHHEN | Abis Resource Adjustment TCHH Function Switch | Meaning:Abis Resource Adjustment TCHH Function Switch Value range:NO(NO),YES(YES) Explanation:This parameter specifies whether to enable the Abis resource adjustment TCHH function. This parameter determines whether the BSC preferentially assigns a half-rate TCH to an MS when the Abis resources are insufficient. When this parameter is set to Yes, the BSC preferentially assigns a half-rate TCH to the MS if the Abis resource load is higher than Flex Abis Prior Choose Abis Load Thred(%) or than Fix Abis Prior Choose Abis Load Thred(%). Default value:None |
| REPEATDLFASET | Repeated Downlink FACCH | Meaning:Repeated Downlink FACCH Value range:NO(NO),YES(YES) Explanation:This parameter specifies whether to support the Repeated Downlink FACCH function in a cell. Default value:None |
| REPEATDLFATHRED | Repeated Downlink FACCH Threshold | Meaning:Repeated Downlink FACCH Threshold Value range:0~7 Explanation:When the cell supports Repeated Downlink FACCH or Repeated SACCH, the BTS enables the repeated transmission of FACCH/SACCH frames if the measured downlink quality is higher than the downlink quality threshold. A low quality threshold indicates a high link quality. Default value:None |
| REPEATSASET | Repeated SACCH | Meaning:Repeated SACCH Value range:NO(NO),YES(YES) Explanation:This parameter specifies whether to support the Repeated SACCH function in a cell. Default value:None |
Modify the basic call control parameters of a cell (Index Type = BYIDX(By Index); Cell Index = 0; RACH Busy Threshold = 16; Paging Times = 4; Assignment Cell Load Judge Enable = DISABLE(DISABLE); Directed Retry Load Access Threshold = 85; MS MAX Retrans = 4_Times(4_Times); Emergent Call Disable = YES(YES); ECSC = YES(YES); Multi-band report = 2; Allow Reassign = YES(YES); Allow eMLPP = YES(YES)): MOD CELLCCBASIC: IDXTYPE=BYIDX, CELLIDX=0, RACHBUSYTHRED=16, PAGTIMES=4, ASSLOADJUDGEEN=DISABLE, DTLOADTHRED=85, MSMAXRETRAN=4_Times, ERGCALLDIS=YES, ECSC=YES, MBR=2, REASSEN=YES, EMLPPEN=YES;