Modify Basic Attributes of Cell(MOD CELLBASICPARA)

Function

A configuration command that modifies the basic attributes of a 2G internal cell. In this command, the following parameters uniquely identify the cell:

Cell Index or Cell Name

Note

1. A cell can support GRPS function only when the BSC that controlling this cell is configured with the PCU.

2. If a cell supports EDGE, NC2, NACC, PACKET SI, or PCU64 neighbor cell, it must support the GPRS.

3. If the cell is set to not support the GPRS, the BSC automatically set the cell to not support EDGE, NC2, NACC, PACKET SI or PCU64 neighbor cell.

Parameters

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 cell number, which is unique in one BSC.

Default value:None

CELLNAME Cell Name

Meaning:Cell Name

Value range:1-32 characters

Explanation: This parameter indicates the name of a cell. The value ranges from 1 to 32 characters.The name of each cell under one BSC must be unique.

Default value:None

BFEDGEMTX baseband hop and edge mutex

Meaning:baseband hop and edge mutex

Value range:NO(NO),YES(YES)

Explanation: The parameter specifies whether the PCU supports baseband FH and EDGE simultaneously.

Default value:None

LAYER cell layer

Meaning:cell layer

Value range:1,2,3,4

Explanation: This parameter indicates the layer where a cell is located. The network designed by Huawei has four layers: Umbrella, Macro, Micro, and Pico.

Each layer has 16 priorities.

The Umbrella layer refers to the GSM900 layer with a large coverage area. It implements the high-layer coverage and the connection of MSs moving at a high speed.

The Macro layer carries most traffic on the GSM900 band. The Micro layer carries most traffic on the DCS1800 band. It solves the problem of insufficient resources. The Micro layer is a main cell layer for dual-band MSs in the future.

The Pico layer is a microcell layer on the GSM900 and DCS1800 bands. It meets the requirements for the provisioning of traffic at hot spots and dead zones.

Default value:None

PRIOR Cell Priority

Meaning:Cell Priority

Value range:PRIOR-1(Prior-1),PRIOR-2(Prior-2),PRIOR-3(Prior-3),PRIOR-4(Prior-4),PRIOR-5(Prior-5),PRIOR-6(Prior-6),PRIOR-7(Prior-7),PRIOR-8(Prior-8),PRIOR-9(Prior-9),PRIOR-10(Prior-10),PRIOR-11(Prior-11),PRIOR-12(Prior-12),PRIOR-13(Prior-13),PRIOR-14(Prior-14),PRIOR-15(Prior-15),PRIOR-16(Prior-16)

Explanation: This parameter controls handover between cells at the same layer. Generally, the cells at the same layer have the same priority. If the cells at the same layer have different priorities, the cell with a smaller value has a higher priority.

Default value:None

MAXTA Max TA

Meaning:Max TA

Value range:0~255

Explanation: This parameter specifies the actual coverage area of a cell.

After receiving the channel request message or handover access message, the BTS determines whether the channel assignment or handover is performed in the cell by comparing the TA and the value of this parameter.

Default value:None

FRDLDTX TCH/F Use Downlink DTX

Meaning:TCH/F Use Downlink DTX

Value range:NO(NO),YES(YES)

Explanation: This parameter specifies whether to enable the DTX function in a cell.

Default value:None

HRDLDTX TCH/H Use Downlink DTX

Meaning:TCH/H Use Downlink DTX

Value range:NO(NO),YES(YES)

Explanation:This parameter specifies whether to enable downlink DTX on the half-rate TCH in a cell.

Default value:None

ENCRY Encryption Algorithm

Meaning:Encryption Algorithm

Value range:A5/0(0),A5/1(1),A5/2(2),A5/3(3),A5/4(4),A5/5(5),A5/6(6),A5/7(7)

Explanation: This parameter specifies the encryption algorithm supported on the BSS side.

The value of this parameter has eight bits. The eights bits (from the least significant bit to the most significant bit) specify whether to support the A5/0, A5/1, A5/2, A5/3, A5/4, A5/5, A5/6, and A5/7 encryption algorithms respectively. If a bit is set to 1, you can infer that the BSS supports the corresponding encryption algorithm. If a bit is 0, you can infer that the BSS does not support the corresponding encryption algorithm.

The eights bits cannot be all zeros and the least significant bit must be 1.

Default value:None

RXMIN RXLEV_ACCESS_MIN

Meaning:RXLEV_ACCESS_MIN

Value range:0~63

Explanation: This parameter specifies the minimum receive level of an MS to access the BSS. For details. see GSM Rec. 05.08.

The value of this parameter ranges from 0 to 63 (corresponding to -110 dBm to -47 dBm).

Default value:None

FRULDTX TCH/F Uplink DTX

Meaning:TCH/F Uplink DTX

Value range:May_Use(May Use),Shall_Use(Shall Use),Shall_NOT_Use(Shall not Use)

Explanation: This parameter specifies whether to allow the MS to use the Discontinuous Transmission (DTX) function. For details, see GSM Rec. 05.08.

Default value:None

HRULDTX TCH/H Uplink DTX

Meaning:TCH/H Uplink DTX

Value range:May_Use(May Use),Shall_Use(Shall Use),Shall_NOT_Use(Shall not Use)

Explanation:This parameter specifies whether to allow the MS that seizes a half-rate TCH to use the uplink Discontinuous Transmission (DTX) function. For details, see GSM Rec. 05.08.

The DTX function is implemented on the basis of the following basic functions: voice activity detection (VAD), silence descriptor (SID), and comfort noise.

The BSC6000 controls whether to enable the downlink DTX function. For details, see the description of the HR Use Downlink DTX parameter.

Default value:None

CALLRESTABDIS Call Reestablishment Forbidden

Meaning:Call Reestablishment Forbidden

Value range:NO(NO),YES(YES)

Explanation: This parameter specifies whether to allow call reestablishment. Blind spots caused by tall buildings or burst interference may lead to failure in radio links. Thus a call may drop. In this case, the MS can initiate a call reestablishment procedure to resume the call. The number of call drops is not incremented if the call reestablishment is successful or if the subscriber hooks on.

Default value:None

IMMASSEN TCH Immediate Assignment

Meaning:TCH Immediate Assignment

Value range:NO(NO),YES(YES)

Explanation: If this parameter is set to Yes, the BSC can assign a TCH and an SDCCH when receiving an initial access request. If this parameter is set to No, the BSC can assign only an SDCCH when receiving an initial access request.

Default value:None

DIRECTRYEN Directed Retry

Meaning:Directed Retry

Value range:NO(NO),YES(YES)

Explanation: This parameter specifies whether to allow directed retry. In directed retry, a handover procedure is performed to hand over the MS to a neighbor cell.

Directed retry is an emergency measure for abnormal peak traffic in the local wireless network. It is not a primary method of clearing traffic congestion. If directed retry is preformed frequently in a local network, you must adjust the TRX configuration of the BTS and the network layout.

Default value:None

UPPCEN UL PC Allowed

Meaning:UL PC Allowed

Value range:NO(NO),YES(YES)

Explanation: This parameter specifies whether the adjustment of the MS power is allowed.

Default value:None

DNPCEN DL PC Allowed

Meaning:DL PC Allowed

Value range:NO(NO),YES(YES)

Explanation: This parameter specifies whether the adjustment of the BTS power is allowed..

Default value:None

SDDYN SDCCH Dynamic Allocation Allowed

Meaning:SDCCH Dynamic Allocation Allowed

Value range:NO(NO),YES(YES)

Explanation: This parameter specifies whether the SDCCH dynamic allocation is allowed.

When the number of GSM subscribers in a cell increases rapidly, many subscribers may fail to access the network due to insufficient SDCCH resources. In this case, the TCHs (including TCH and dynamic PDCH that acts as TCH) must be converted into SDCCHs to ensure the access of most subscribers. The SDCCH dynamic adjustment can increase the system capacity.

Default value:None

LEVELRPT Level Report Switch

Meaning:Level Report Switch

Value range:NO(Not Support), YES(Support), NONE(Invalid)

Explanation: For the BTS30, BTS312, BTS3012A, BTS3006A, BTS3012E, and BTS3002E, this parameter is set to "YES (Support)" by default and the default value can be manually modified. For the BTS of other models, this parameter is set to "NONE (Invalid)" and the default value cannot be manually modified, that is, the receive levels of main and diversity are not reported. This parameter specifies whether the BTS sends the measurement report containing the main and diversity level to the BSC. After the BTS reports the main and diversity level to the BSC, the information is mainly used to record traffic statistics.

Default value: None

DYNOPENTRXPOWER Allow Dynamic Shutdown of TRX Power Amplifier

Meaning:Allow Dynamic Shutdown of TRX Power Amplifier

Value range:NO(NO),YES(YES)

Explanation: This parameter specifies whether the BSC determines to enable or disable the power amplifier of a TRX based on the traffic volume.

Default value:None

BTSADJUST Adjust Voltage

Meaning:Adjust Voltage

Value range:NO(NO),YES(YES)

Explanation: This parameter specifies whether to select different working voltages for the TRX power amplifier in a cell based on different TRX modulation modes.

Default value:None

GMSKDELAY Diversity Transmitter GMSK Delay

Meaning:Diversity Transmitter GMSK Delay

Value range:4~32

Explanation: Generally, the time delay of the transmit diversity is set to 2 bit (7.4 us) and is applied to common attenuation environment. The transmit diversity can achieve a power gain of 3-5 dB. As the attenuation environment differs, a permanent time delay results in different gains for different users. A permanent time delay also has negative impact to the codes of EDGE services.

Therefore, the time delay of the transmit diversity should be configurable, and the time delay for the GMSK and the 8PSK should be specified separately. The unit of the time delay parameter is 1/8 bit. The default time delay for GMSK is 2 bit and the default time delay for 8PSK is 1 bit.

Default value:None

8PSKDELAY Diversity Transmitter 8PSK Delay

Meaning:Diversity Transmitter 8PSK Delay

Value range:4~32

Explanation: Generally, the time delay of the transmit diversity is set to 2 bit (7.4 us) and is applied to common attenuation environment. The transmit diversity can achieve a power gain of 3-5 dB. As the attenuation environment differs, a permanent time delay results in different gains for different users. A permanent time delay also has negative impact to the codes of EDGE services.

Therefore, the time delay of the transmit diversity should be configurable, and the time delay for the GMSK and the 8PSK should be specified separately. The unit of the time delay parameter is 1/8 bit. The default time delay for GMSK is 2 bit and the default time delay for 8PSK is 1 bit.

Default value:None

ICBALLOW ICB Allowed

Meaning:ICB Allowed

Value range:NO(NO),YES(YES),NULL(NULL)

Explanation:This parameter specifies whether to enable the power-saving TRXs. If this parameter is set to Yes, the power-saving TRXs are preferentially enabled.

Default value:None

TIMESLOTVOLADJALLOW Voltage Adjust Based Timeslots Allowed

Meaning:Voltage Adjust Based Timeslots Allowed

Value range:NO(NO),YES(YES),NULL(NULL)

Explanation:This parameter specifies whether to enable the dynamic voltage adjustment function based on the number of timeslots.

Default value:None

Example

Modify the basic attributes of a cell (Index Type = BYIDX(By Index); Cell Index = 0; cell layer = 3; Cell Priority = PRIOR-1(Prior-1)):
MOD CELLBASICPARA: IDXTYPE=BYIDX, CELLIDX=0, LAYER=3, PRIOR=PRIOR-1;
Related reference
Add BTS(ADD BTS)
Add Cell(ADD CELL)

Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.