A configuration command that modifies the basic idle parameters of the cell. In this command, Cell Index or Cell Name uniquely identifies a cell.
1. When the cell CBCH channel is CBCH+SDCCH8, the BSAGBLKSRES must be equal to or greater than 1.
2. When the CCCH is configured as a combined CCCH, the value range of the BSAGBLKSRES is 0-2, and the range in other cases is 0-7.
| 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 |
| ATT | Attach-detach allowed | Meaning:Attach-detach allowed Value range:NO(NO),YES(YES) Explanation:This parameter specifies whether to enable the Attach-detach allowed (ATT) function. For different cells in the same LAC, their ATTs must be the same. If this parameter is set to Yes, network connection is not provided after the MS is powered off, thus saving the network processing time and network resources. Default value:None |
| TX | Tx-integer[RACH Timeslot] | Meaning:Tx-integer[RACH Timeslot] Value range:TX_3(3),TX_4(4),TX_5(5),TX_6(6),TX_7(7),TX_8(8),TX_9(9),TX_10(10),TX_11(11),TX_12(12),TX_14(14),TX_16(16),TX_20(20),TX_25(25),TX_32(32),TX_50(50) Explanation:This parameter specifies the number of timeslots between the consecutive transmissions of channel request messages by an MS. To reduce the collisions on the RACH and to improve the efficiency of the RACH, an access algorithm is defined in GSM Rec. 04.08. The algorithm specifies three parameters: Tx-integer (T for short), maximum number of retransmissions (RET), and S related to channel combination. This parameter works with the configuration of the CCCH to determine the parameter S. The relations between this parameter and the configuration of the CCCH are as follows: When this parameter is set to 3, 8, 14, or 50, S is 55 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 3, 8, 14, or 50, S is 41 if the CCCH and SDCCH share a physical channel. When this parameter is set to 4, 9, or 6, S is 76 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 4, 9, or 6, S is 52 if the CCCH and SDCCH share a physical channel. When this parameter is set to 5, 10, or 20, S is 109 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 5, 10, or 20, S is 58 if the CCCH and SDCCH share a physical channel. When this parameter is set to 6, 11, or 25, S is 163 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 6, 11, or 25, S is 86 if the CCCH and SDCCH share a physical channel. When this parameter is set to 7, 12, or 32, S is 217 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 7, 12, or 32, S is 115 if the CCCH and SDCCH share a physical channel. The timeslot for sending messages is a random value from the collection of {0, 1,..., MAX(T, 8)-1}. The number of timeslots (excluding the timeslot used to send messages) between two adjacent channel request messages is a random value from the collection of {S, S+1, ..., S+T-1}. When T increases, the interval between two adjacent channel requests increases, and RACH conflicts decrease. When S increases, the interval between two adjacent channel request messages increases, and RACH conflicts decrease, thus improving the usage of AGCH and SDCCH. The access time of the MS, however, is prolonged and the network performance is decreased when T and S increase. Under normal conditions, an appropriate T value should be used to ensure that S is as low as possible, and ensure that AGCH and SDCCH are not overloaded. Default value:None |
| CBA | Cell bar access | Meaning:Cell bar access Value range:NO(NO),YES(YES) Explanation:This parameter specifies the cell bar access (CBA). Value 0 indicates that cell access is allowed. Value 1 indicates that cell access is not allowed. Together with CBQ, this parameter can be used to determine the priority of cells. For details, see GSM Rec. 04.08. Cell_Bar_ Access Cell_Bar_Qualify Cell selection priority Cell reselect priority 0 0 Normal Normal 0 0 Barred Barred 1 0 Low Normal 1 1 Low Normal. Default value:None |
| CBQ | Cell bar qualify | Meaning:Cell bar qualify Value range:NO(NO),YES(YES) Explanation:This parameter Cell Bar Qualify (CBQ) is valid only for cell selection. It is invalid for cell reselection. 1: barred 0: allowed Together with CBA, this parameter determines the priority of cells. For details, see GSM Rec. 04.08. Cell_Bar_ Access Cell_Bar_Qualify Cell selection priority Cell reselect priority 0 0 Normal Normal 0 0 Barred Barred 1 0 Low Normal 1 1 Low Normal. Default value:None |
| BSAGBLKSRES | Number of CCCH blocks reserved for the AGCH | Meaning:Number of CCCH blocks reserved for the AGCH Value range:0~7 Explanation:This parameter specifies the number of CCCH blocks reserved for the AGCH. After the CCCH is configured, this parameter actually indicates the CCCH usage for AGCH and PCH. This parameter affects the paging response time of an MS and the system performance. Default value:None |
| BSPAMFRAMS | Number of multi-frames in a cycle on the paging channel | Meaning:Number of multi-frames in a cycle on the paging channel Value range:2_M_PERIOD(2 Multiframe Period),3_M_PERIOD(3 Multiframe Period),4_M_PERIOD(4 Multiframe Period),5_M_PERIOD(5 Multiframe Period),6_M_PERIOD(6 Multiframe Period),7_M_PERIOD(7 Multiframe Period),8_M_PERIOD(8 Multiframe Period),9_M_PERIOD(9 Multiframe Period) Explanation:This parameter specifies the number of multi-frames in a cycle on the paging channel, that is, the number of paging sub-channels on a specific paging channel. In actual situation, an MS monitors only the associated paging sub-channel. For details, see GSM Rec. 05.02 and 05.08. If the value of this parameter increases, the number of paging sub-channels in a cell increases, thus reducing the number of MSs served by each paging sub-channel and prolonging the average service time of the MS battery. For details about the calculation of the paging group, see GSM Rec. 05.02. But the delay of paging messages increases, and the system performance deteriorates as the value of this parameter increases. This parameter should be set on the basis that the paging channel is not overloaded. In addition, the value of the parameter should be as small as possible. The load of the paging channels should be periodically measured on the running network. The value of this parameter should be adjusted on the basis of the load. A paging message must be sent simultaneously in all the cells in an LAC. Thus, the capacity of the paging channel in a cell, that is, the number of paging sub-channels in a cell, must be the same as or similar to that in other cells of an LAC. Default value:None |
| T3212 | T3212[6 minutes] | Meaning:T3212[6 minutes] Value range:0~255 Explanation:This parameter specifies the length of the timer for periodic location update. In the VLR, a regular location update timer is defined. When the location update period decreases, the service performance is improved. When the signaling traffic of the network increases, the usage of radio resources drops.In addition, when the location update period decreases, the MS power consumption increases, and the average standby time is greatly shortened.When setting this parameter, take into consideration the processing capability of the MSC and BSC, the load on the A interface, Abis interface, Um interface, HLR, and VLR. Generally, a larger value is adopted in continuous coverage in urban areas and a smaller value in suburbs, rural areas, or blind spots. Default value:None |
| CRH | Whether cell reselection is performed between different LACs | Meaning:Whether cell reselection is performed between different LACs Value range:0dB,2dB,4dB,6dB,8dB,10dB,12dB,14dB Explanation:This parameter is used to determine whether cell reselection is performed between different LACs. This parameter can prevent frequent location update, thus lowering the possibility of losing paging messages. For details, see the description of the cell reselection hysteresis. Default value:None |
| PI | Cell reselect parameters indication | Meaning:Cell reselect parameters indication Value range:NO(NO),YES(YES) Explanation:Cell Reselect Parameters Indication (PI for short), sent on the broadcast channel, indicates whether CRO, TO, and PT are used. Actually, the MS is informed whether C2-based cell reselection is performed. For details, see GSM Rec. 0408 and 0508.In addition, a least interval of 5s is required for C2-based cell reselection to avoid frequent cell reselection. When PI is set to 1, the MS obtains the value of C2 based on the broadcast system information and determines whether a cell is reselected. When PI is set to 0, that is, C2 equals C1, the MS determines whether a cell is reselected based on the value of C1. Default value:None |
| NCCPERMIT | NCC Permitted | Meaning:NCC Permitted Value range:SELECTION0_PERM(0),SELECTION1_PERM(1),SELECTION2_PERM(2),SELECTION3_PERM(3),SELECTION4_PERM(4),SELECTION5_PERM(5),SELECTION6_PERM(6),SELECTION7_PERM(7) Explanation:This parameter specifies the NCCs to be reported by the MSs in a cell. This parameter is an information element (IE) in the system information type 2 and 6 messages.The value of the parameter NCC Permitted consists of eight bits. The most significant bit is defined as bit 7, and the least significant bit is defined as bit 0. The eight bits (from bit 0 to bit 7) correspond to the NCC values (0-7). For example, bit 0 corresponds to NCC value 0.If bit n of NCC Permitted of the cell where the operating MS is located is set to 0, the MS cannot report the information about the neighboring cells in the network whose NCC value is set to n. Thus, this parameter should be correctly set. Otherwise, an MS during an ongoing call cannot perform a normal handover, and thus a call drop occurs. Default value:None |
| CRO | Cell reselect offset[2dB] | Meaning:Cell reselect offset[2dB] Value range:0~63 Explanation:This parameter specifies the manual correction of C2. If this parameter is properly configured, the number of handovers can be reduced and a better cell can be assigned to the MS. When PT is set to 31, it becomes more difficult for an MS to access the cell when CRO increases. Generally, the CRO should be less than 25 dB because excessively large CRO may bring uncertainties to the network.In addition, the same CRO applies to the cells with the same priority.For details, see GSM Rec. 05.08 and 04.08. This parameter affects only GSM Phase II MSs or GSM PhaseII+ MSs. Default value:None |
Modify the basic idle parameters of the cell (Index Type = BYIDX(By Index); Cell Index = 0): MOD CELLIDLEBASIC: IDXTYPE=BYIDX, CELLIDX=0, ATT=YES, TX=TX_32, CBA=0, CBQ=0, BSAGBLKSRES=2, BSPAMFRAMS=3_M_PERIOD, T3212=20, CRH=6dB, PI=YES, NCCPERMIT=SELECTION0_PERM-1&SELECTION1_PERM-1&SELECTION2_PERM-1&SELECTION3_PERM-1&SELECTION4_PERM-1&SELECTION5_PERM-1&SELECTION6_PERM-1&SELECTION7_PERM-1, CRO=0;