Final CDDParametersTableRecommended valueDefaultDescriptionConfiguration PolicyNSN PARAMETERNameParameter NameUnitStep SizeDefault ValueRangeFrequency BandCell_CommonGSM900&DCS1800BANDfrequency band in useGSM 900 (0)GSM 900 (0), GSM 1800 (1), GSM 1900 (2), GSM 800 (5)Administrative StateCell_CommonUnlockedLayer of the CellCell_Common33This parameter specifies the layer where a cell is located. The network designed by Huawei has four layers: Pico, Micro, Macro, and Umbrella, numbered 1-4 respectively. The Pico layer is a microcell layer on the 900 MHz and 1800 MHz frequency bands. It mThe network has four layers, numbered 1-4 respectively. If the number of the layer is small, the priority of the layer is high. This parameter and Cell Priority determine the priority of a cell. The priority affects the sequencing of neighbor cells forMCCCell_Common470NoneThis parameter specifies the mobile country code (MCC), for example, the MCC of China is 460.NoneMCCmobile country code3 charactersMNCCell_Common02NoneThis parameter specifies the mobile network code (MNC).NoneMNCmobile network code2...3 charactersNCCCell_Common0~70This parameter specifies the network color code, which is provided by the telecom operator. The NCC is used to identify networks from area to area. The NCC is unique nationwide. The NCC and the BCC form the base station identification code (BSIC).This parameter should be set as required.NCCBSIC NCC10...7BCCCell_Common0~70This parameter specifies the base station color code. The BCC identifies the cells with the same BCCH frequency in the neighborhood. The BCC and the NCC form the BSIC.1. A training sequence is known by both the transmit end and the receive end. It is used to acknowledge the exact position of the other bits in the same burst and to determine whether the received co-channel signals are useful signals. If a burst is inconBCCbsIdentityCodeObligatory in creation when LCSE not connected to any segment, otherwise read from RNW db.07Cell PriorityCell_CommonPrior-1Prior-1This parameter specifies the handover between the cells at the same layer. If this parameter is set to a small value, the priority is high. Generally, the cells at the same layer have the same priority. For details, refer to Layer of the Cell.Each layer has 16 priorities, numbered 1-16 respectively. If the number of the priority is small, the priority is high. This parameter along with Layer of the Cell determines the priority of a cell. The priority affects the sequencing of neighbor cells foActivity StatusCell_CommonActivatedActivatedThis parameter specifies the activation status of a cell. The activation status can be Not Activated or Activated.NonePCUCell_Common255255This parameter specifies the number of the PCU that is connected to the E1 link on the Pb interface.NoneGPRS SupportCell_Commonsupport GPRSnot support GPRSThis parameter specifies whether to enable the general packet radio service (GPRS) in a cell. The GPRS requires the support of the BTS. In addition, a packet control unit (PCU) must be configured on the BSS side, and a serving GPRS support node (SGSN) musNoneGENAGPRSenabledNNoYesSupport Baseband FH and EDGE simultaneouslyCell_CommonYesYesThe parameter specifies whether the PCU supports baseband FH and EDGE simultaneously.NoneEDGE SupportCell_CommonNoNoThis parameter specifies whether to enable the EDGE function in a cell. Compared with GSM, EDGE supports high-rate data transmission. The enhanced data rates for GSM evolution (EDGE) consists of EGPRS and ECSD. The EGPRS is the enhanced GPRS, which improvNoneEGENAegprsEnabledNY/N8PSK power attenuation gradeCell_Common00This parameter specifies the power attenuation level of a timeslot when 8PSK is used by an EDGE-enabled TRX. The attenuation value has 50 levels. Each level attenuates by 0.2 dB. The EDGE-enabled TRX transmits 8PSK signals with less power than transmitsNoneSupport NACCCell_CommonNoNoThis parameter specifies whether the cell support the Network Assisted Cell Change (NACC) function.In network control mode NC0, NC1, or NC2, when the MS is in the packet transmission mode, the network informs the MS of the system information about neighbYes: In network control mode NC0, NC1, or NC2, when the MS is in the packet transmission mode, the network informs the MS of the system information about neighbor cells in advance.No: In network control mode NC0, NC1, or NC2, when the MS is in the packetSupport PACKET SI STATUSCell_CommonNoNoThis parameter specifies whether the cell supports the PACKET SI STATUS procedure.When the cell is configured with the PBCCH, the MS sends the Packet PSI/SI Status message to the BSC, indicating that the MS has stored the system message. The BSC sends thNoneSupport NC2Cell_CommonNoNoThis parameter specifies whether the cell supports the Network Control 2 (NC2) function. In NC2, the MS reports the measurement report of the reference cell and neighbor cells to the BSC. The BSC controls cell reselection (including normal reselections aNonePCU Support 64 Neighbor CellsCell_CommonNoNoThis parameter specifies whether the PCU supports 64 neighbor cells.In the NACC and NC2 functions, this parameter affects the ability of the BSC to report the number of neighbor cells.If this parameter is set to Yes, the BSC reports the information about all neighbor cells to the PCU when there are more than 32 neighbor cells. If this parameter is set to No, the BSC reports the information about a maximum of 32 neighbor cells to the PCLevel report switchCell_CommonSupportSupportFor the BTS3002C, BTS3001C, BTS3001C+,BTS22C and BTS20, the default value is Invalid and cannot be manually modified. That is, the main and diversity level cannot be reported. For other types of BTSs, the default value is Support and can be manually modifNoneCellbandCell_Common00This parameter specifies the frequency band of new cells. Each new cell can be allocated frequencies of only one frequency band. Once the frequency band is selected, it cannot be changed.GSM900: The cell supports GSM900 frequency band.DCS1800: The cellNoneBANDfrequency band in useGSM 900 (0)GSM 900 (0), GSM 1800 (1), GSM 1900 (2), GSM 800 (5)RACCell_CommonAs per planAs per planThis parameter specifies that the network service (NS) in the GPRS packet service state performs location management based on the routing area.Each routing area has an ID. The routing area ID is broadcast in the system message.For example, value 0 indicNoneRACrouting area code2550255Support DTMCell_CommonNot SupportNot SupportThis parameter specifies whether the cell supports the Dual Transfer Mode (DTM) function. The DTM function enables an MS to provide both the CS service and the PS service at the same time. The function requires the support of the BSC.NoneSupport Enhanced DTMCell_CommonNot SupportNot SupportThis parameter specifies whether the cell supports the enhanced DTM function. Compared with the DTM function, the enhanced DTM function enhances the CS setup and release. When the CS service is set up, the PS service is not disrupted.NoneEncryption AlgorithmCell_Common000000011This 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, ANoneFH MODECell_CommonAs per frequency planAs per frequency planThis parameter specifies whether the TRX adopts FH and specifies the FH mode used. If this parameter is set to Not FH, even if the TRX is configured with FH data, the cell where the TRX serves does not perform FH. FH can be used to average the interferenNoneHOPHoppingModeNoNo/BB/RFDL DTXCell_CommonNo (tunable based on performance)YesThis parameter specifies whether to enable the DTX function in a cell.The discontinuous transmission (DTX) function allows a transmitter to stop power transmission in the case of no voice transfer. This function has the following benefits: 1. On the uplink: decreasing the power consumption of the MS and reducing system intMAX TA(bit period(1 bit=0.55km))Cell_Common6362This 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 valueThe value of this parameter correlates with Cell ExtType. If this parameter is set to a too small value, the handover success rate may be affected.DMAXmsMaxDistanceInCallSetupTA2550...255Cell Extension TypeCell_CommonNormal cellNormal CellThis parameter specifies whether a cell is an extension cell and specifies how to implement the extended cell. A double-timeslot extension cell regards the additional TDMA frame as access delay. Theoretically, TA equals 219, that is, a delay of about 120NoneDMAXmsMaxDistanceInCallSetupTA255Cell Antenna HoppingCell_CommonNoneNoneThis parameter specifies whether a cell supports the antenna hopping function. In a GSM cell, the frequency, frame number, system information, and paging group are transmitted on the BCCH of the main BCCH TRX. If the MS is in an unfavorable position or tNoneAHOPEnhanced Concentric AllowedCell_CommonNoYesThis parameter specifies whether the enhanced concentric cell handover is allowed in a concentric cell. If the cell supports the enhanced concentric cell function, compare the receive level of the MS with OtoU HO Received Level Threshold and with UtoO HONoneCell TypeCell_CommonNormal CellNormal cellThis parameter specifies whether a cell is a normal cell or a concentric cell. TRXs in a concentric cell differ in coverage; thus, two subcells with different radiuses form a concentric cell. Due to the difference in coverage, the OL subcell and the ULAs specified in Huawei concentric cell technology, a concentric cell is divided into an OL subcell and a UL subcell. The TRXs of the OL subcell and of the UL subcell can use different frequency reuse modes. The concentric cell technology can be combinedAttributes of UL And OL SubcellsCell_CommonNONENONEThis parameter specifies whether a cell is the OL subcell or the UL subcell. This parameter is applied to the enhanced dualband cell.NoneBCCH Concentric AttributeCell_CommonNoneNoneThis parameter specifies whether the main BCCH is configured in the OL subcell or the UL subcell. In the scenario of the wide coverage of the UL subcell and the aggressive frequency reuse of the OL subcell, this parameter is set to Underlaid Subcell. InWhen the BCCH is configured in the OL subcell, it is not configured in the UL subcell.UL DTXCell_CommonShall UseShall UseThis parameter specifies whether to allow the MS to use the Discontinuous Transmission (DTX) function. For details, see GSM Rec. 05.08.The DTX function allows a transmitter to stop power transmission in the case of no voice transfer. This function has the following benefits: 1. On the uplink: decreasing the power consumption of the MS and reducing system interference 2. On the downlinkDTXdtxMode20...2Call Reestablishment ForbiddenCell_CommonYesYesThis 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 resuThe average call drop rate decreases if call reestablishment is allowed. If this parameter is set to No, the average call drop rate decreases. In suburban areas and urban areas with poor coverage, this parameter should be set to No. Call reestablishmentREcallReestablishmentAllowedNYes/NoRXLEV_ACCESS_MINCell_Common11This 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).If the value of this parameter is too small, the required level of received signals is low. Therefore, many MSs attempt to camp on the cell, thus increasing the load of the cell and the risk of call drops. In such a case, you must set the parameter basedRXPrxLevAccessMindBm-105-110...-47TCH Immediate AssignmentCell_CommonNoNoIf 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.NoneDirect RetryCell_CommonYesYesThis 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 nNoneDRdrInUseNYes/NoSDCCH Dynamic Allocation AllowedCell_CommonYesYesThis 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 (includiNoneDYNAMIC_SDCCHUL PC AllowedCell_CommonYesYesThis parameter specifies whether the adjustment of the MS power is allowed.NoneDL PC AllowedCell_CommonYesYesThis parameter specifies whether the adjustment of the BTS power is allowed..NonePENApowerCtrlEnabledYYes/NoAllow Dynamic Shutdown of TRX Power AmplifierCell_CommonYesYesThis parameter specifies whether the BSC determines to enable or disable the power amplifier of a TRX based on the traffic volume.NoneAllow Dynamic Voltage AdjustmentCell_CommonYesYesThis parameter specifies whether to select different working voltages for the TRX power amplifier in a cell based on different TRX modulation modes.NoneTRX IndexTRxDepend on invidual site65535This parameter specifies the unique index number of each TRX in a BSC.NoneTRX_IDTRX ID11...16TRX No.TRxDepend on invidual site255This parameter specifies the TRX number, which must be unique in one BTS. The following two points should be paid attention to: 1. If the logical TRX is not separated from the physical board, This parameter specifies the TRX number in a cabinet. For such BTSs as the BTS3012II and BTS3002E, the TRX numbers may be discontinuous. 2. If the logical TRX is separated from the physical board, one-to-one mapping between them is not mandatory.NoneTRX_NUMFCell IndexTRxDepend on invidual siteNoneCell Index must be unique in one BSC. It is used to uniquely identify a cell. The value of this parameter ranges from 0 to 8047.Internal 2G cells: 0-2047 External 2G cells: 2048-5047 External 3G cells: 5048-8047NoneCICellId-165535Site IndexTRxDepend on invidual site65535This parameter specifies the index number of a BTS. Each BTS is numbered uniquely in a BSC.NoneBTS_IDBTS ID1...10 charactersBoard TypeTRxDepend on invidual siteNoneThis parameter is used to differentiate boards with unique identifiers in the BTS.NoneActive StateTRxActivatedActivatedThis parameter specifies the operating status of the BTS, not-activated and activated.If you activate a not-activated BTS, all the cells, TRXs, and boards in this BTS will be activated.Conversely, if you deactivate an activated BTS, all the cells, TRXs, and boards in this BTS will be deactivated.When the BTSs are cascaded, the lower-level BTS should be set to Not Activated if the Active State of the upper-level BTS is set to Not Activated.STATEAdministrative StateLocked (3)Abis ModeTRxAutoAutoThis parameter specifies the Abis mode of OML.The default value is calculated automatically, that is, the BSC assigns the Abis time slot of OML automatically.Generally, the timeslots are automatically calculated and assigned. The timeslots, however, can be also manually assigned to meet the requirement of operators. The manually assigned OML timeslot cannot be adjusted when the timeslot is arranged.The manually assigned OML timeslots can only be modified manually.Cabinet No.TRxDepend on invidual site0This parameter specifies the number of a cabinet.This parameter cannot be modified once it takes effect.Subrack No.TRxDepend on invidual site0This parameter specifies the number of a subrack.This parameter cannot be modified once it takes effect.Slot No.TRxDepend on invidual siteNoneThis parameter specifies the number of the slot where a board is located.This parameter cannot be modified once it takes effect.TEITRxDepend on invidual site0This parameter specifies the terminal equipment identifier on the link layer. This parameter is used to identify multiple signaling links on the same physical link when the LAPDs are multiplexed on the highway timeslot.NoneOut-BSC Subrack No.TRxDepend on invidual site0This parameter specifies the number of the TC subrack where the GEIUT/GOIUT is located.This parameter cannot be set to the number of the occupied subrack.Out-BSC Slot No.TRxDepend on invidual siteNoneThis parameter specifies the number of the slot where the GEIUT or GOIUT is located in the TC subrack, which is connected to the local subrack.NoneOut-BSC Port No.TRxDepend on invidual siteNoneThis parameter specifies the out-BSC port number on the interface board used by the semi-permanent link. When the semi-permanent link is configured on the electrical interface board, each electrical interface board is configured with 32 E1 ports, which are numbered from 0 to 31. When the semi-permanent link is configured on the optical interface board, each optical interface board is configured with 63 E1 ports, which are numbered from 0 to 62.This parameter cannot be set to the number of the occupied E1 port. If all semi-permanent links are configured on one interface board, the In-BSC Port No. and the Out-BSC Port No. must be set to different E1 ports on the interface board.Out-BSC Timeslot No.(8K)TRxDepend on invidual site255This parameter specifies the number of the out-BSC timeslot occupied by the E1 port over the Abis interface.The bandwidth of each E1 is divided into 32 timeslots. Generally, timeslot 0 is used for synchronization and cannot be otherwise used.The E1 timeslot is numbered by 8 kbit/s, and the range is 0-255.For example, 0-3 specifies the first to the fourth 8 kbit/s sub-timeslot of the first 64 kbit/s timeslot. Accordingly, the timeslot numbering is likewise.This parameter is to be viewed only.RSL In Site Port No.TRxDepend on invidual site255If the forward ring of the BTSs functions, this parameter specifies the number of the port occupied by the LAPD link (corresponding to the RSL link) on the Abis interface.NoneRSL In Site Timeslot No.(8K)TRxDepend on invidual site255If the forward ring of the BTSs functions, this parameter specifies the number of the timeslot occupied by the LAPD link (corresponding to the RSL link) on the Abis interface.NoneRSL Logic No.TRxDepend on invidual site2048This parameter specifies the logical link number of the LAPD link (corresponding to the RSL link) in the BSC. When the BTS works in ring topology, the forward and reverse links share one number. Each LAPD link is uniquely numbered in one BSC.NoneHop TypeTRxAs per frequency planNoneThis parameter specifies whether the TRX adopts FH and specifies the FH mode used. If this parameter is set to Not FH, even if the TRX is configured with FH data, the cell where the TRX serves does not perform FH. The FH can realize average interference and frequency diversity.The BTS2X supports frame FH and RF FH. The BTS3X of all versions supports the cross-cabinet baseband FH and RF FH, including the timeslot FH and frame FH. The double-transceiver BTSs support the baseband FH and RF FH, including the timeslot FH and frame FH, but do not support the cross-cabinet baseband FH.Power LevelTRx00This parameter specifies the transmit power level of the TRX. The greater this parameter is, the smaller the transmit power is. When this parameter is set to 0, the transmit power level of the TRX is the greatest. Each time this parameter increases by one level, the transmit power reduces by 2 dB. For different types of BTSs, the value range of this parameter is different.BTS3X: 0-10BTS3001C: 0-13BTS3002C: 0-10Double-transceiver BTSs (BTS3012BTS3012AEBTS3006C): 0-10DBS3900 GSM, BTS3900 GSM, BTS3900A GSM0-10Adjust the cell coverage area by configuring the Power Level; however, when the antenna is over high and covers too many cells, you should lower the antenna and increase the tilt of the antenna first. When the transmit power of a BTS reduces, the indoor coverage becomes worse.Generally, for cells of the same priority in a network, the power level configuration should ensure that the EIRPs of the cells are basically the same.When configuring the power level, you should note that different TRXs in a cell can have different losses due to different combination modes.Power TypeTRxDepends on BTS/site configurationDefaultThis parameter specifies the power levels supported by a TRX. The macro BTS and the mini BTS support different power levels.NoneHW_Concentric AttributeTRxDepends on BTS/site configurationNoneThis parameter specifies the concentric attribute of a cell. For a concentric cell, this parameter is set to UL subcell or OL subcell according to actual conditions; if the cell is not a concentric one, this parameter is set to None by default.NoneTRX PriorityTRxLevel0Level0This parameter specifies the TRX priority. It is used for Huawei II channel assignment algorithm.The smaller this parameter is, the higher the TRX priority is. In other similar conditions, channels are allocated to the TRX with higher priority.Shut Down EnableTRxEnableEnableThis parameter specifies whether to turn off the power amplifier of the TRX automatically for saving power when the BTS is powered by batteries after the external power supply is cut off.NoneTCH Rate Adjust AllowTRxYesNoThis parameter specifies whether a cell can convert full rate channels to half rate channels, or convert the half rate channels to full rate channels. If this parameter is set to Yes, the conversion is allowed; if the parameter is set to No, the conversion is not allowed. the TCHF that has been converted to the TCHH will be forcedly restored; the TCHH that has been converted to the TCHF will be forcedly restored. This parameter also specifies whether the channel supports the dynamic adjustment priority in the channel assignment algorithm. In the channel assignment, the channels on the TRX not supporting the dynamic adjustment are assigned first, to ensure the channels on the TRX supporting the dynamic adjustment are used for dynamic adjustment. Thus, the access requests of users are satisfied.NoneTRX 8PSK LevelTRx00This parameter specifies the power attenuation levels of the EDGE TRX. There are 50 levels, and the attenuation between levels is 0.2 dB. The EDGE-enabled TRX transmits 8PSK signals with less power than transmits GMSK signals. Thus, this parameter needs to be set to meet the frequency requirements.This parameter takes effect only for the EDGE-enabled TRX.Wireless Link Alarm FlagTRxNoNoThis parameter specifies whether the BSC sends the wireless link alarm parameter to the BTS. If the parameter is set to Yes, the wireless link alarm parameter is sent; otherwise, the wireless link alarm parameter is not sent.NoneAbnormal Release Statistic BaseTRx100100This parameter specifies the statistics base of a sub-channel (the statistical times that a sub-channel that is activated). B (the statistics base of a sub-channel on a timeslot) x N (the number of sub-channels on a timeslot) = S (the total times that channels on a timeslot that are activated). For the latest S times of channel activation, if the percentage of abnormally released channels exceeds Abnormal Warn Threshold, an alarm is generated. If the percentage of abnormally released channels is less than or equal to Abnormal Release Threshold, the BSC sends the corresponding recovery alarm.NoneAbnormal Warn ThresholdTRx100100If the percentage of abnormally released channels exceeds the total successful channel activation threshold of a timeslot, an abnormally release alarm is generated.NoneAbnormal Release ThresholdTRx5050If the percentage of abnormally released channel in the total successful channel activation is less than or equal to this threshold, an abnormal release clear alarm is sent.NoneStatical Period of No-traffic(5min)TRx4848If the duration of continuous (not accumulated) no-traffic reaches this threshold, the no-traffic alarm is generated.NoneWireless Link Alarm Critical PermitTRxYesYesThis parameter specifies whether a critical wireless link alarm is sent. If this parameter is set to Yes, the BTS sends a critical wireless link alarm if the wireless link prompt alarm is not cleared during the period specified by WLA Prompting Recover Period.NoneWLA Prompting Recover Period(5min)TRx1212If the radio link prompt alarm is cleared in the WLA Prompting Recover Period, the corresponding recovery alarm is sent by the BTS. If the radio link prompt alarm is not cleared in the WLA Prompting Recover Period, the critical wireless link alarm is sent or not sent according to the settings of the parameter Wireless Link Alarm Critical Permit.NoneBegin Time of WLA Detection(hour)TRx88The BTS detects the start time of wireless link alarm, such as 08:00:00 and 14:00:00 in each day. Starting from the period specified by this parameter, the BTS detects the wireless link alarm, and sends an alarm related.NoneEnd Time of WLA Detection(hour)TRx2222The BTS detects the start time of wireless link alarm, such as 08:00:00 and 14:00:00 in each day. Until the end of the period specified by this parameter, the BTS stops detecting the wireless link alarm and sending the alarm related. The detection starts again until the next Begin Time of WLA Detection(hour).NoneUp Down Balance Basic DifferenceTRx88This parameter specifies the basic difference value caused by the specified level difference between the uplink channel and the downlink channel. Together with Up Down Balance Floating Range, this parameter is used to calculate the number of uplink and downlink unbalance. Assume that Up Down Balance Basic Difference is set to 8 and Up Down Balance Alarm Threshold is set to 30. If the downlink level minus the uplink level after the power control compensation is greater than 8+30 or less than 8-30, the uplink and the downlink are not balanced; otherwise, the uplink and downlink are balanced.NoneUp Down Balance Floating RangeTRx3030This parameter specifies the permissible uplink and downlink balance floating range relative to Up Down Balance Basic Difference. The uplink and downlink is not balanced only when the uplink and downlink level exceeds the Up Down Balance Floating Range. Assume that Up Down Balance Basic Difference is set to 8 and Up Down Balance Alarm Threshold is set to 30. If the downlink level minus the uplink level after the power control compensation is greater than 8+30 or less than 8-30, the uplink and the downlink are not balanced; otherwise, the uplink and downlink are balanced.NoneUp Down Balance Alarm ThresholdTRx8080When the percentage of the uplink-and-downlink balance measurement reports in the total valid measurement reports is greater than or equal to the value of this parameter, the uplink and downlink unbalance alarm is generated.NoneReceive ModeTRxDepends on BTS/site configurationNoneThis parameter specifies the RF receive mode of the DTRU. The RF receive mode can be Not Support, Independent Receiver, Dividing Receiver, Four Diversity Receiver, or Main Diversity. The BTS3012, BTS3012AE, BTS3012II, BTS3006C, and BTS3002E do not support Main Diversity. The DBS3900 GSM and BTS3900 GSM support Four Diversity Receiver and Main Diversity.NoneRDIVdiversityUsedNY/NSend ModeTRxDepends on BTS/site configurationNoneThis parameter specifies the RF transmit mode of the TRX. The RF transmit mode can be Not Support, No Combining, Power Booster Technology, Wide Band Combining, Diversity Transmitter, DDIVERSITY, DPBT, or Transmitter Independent or Combining.The BTS3006C and BTS3002E support No Combining, Diversity Transmitter, DDIVERSITY and DPBT.The DBS3900 GSM GRRU supports No Combining, Diversity Transmitter and DDIVERSITY.The BTS3900 GSM and BTS3900A GSM support No Combining, Power Booster Technology, Wide Band Combining, Diversity Transmitter, DDIVERSITY and DPBT. The BTS3012 supports No Combining, Power Booster Technology, Power Booster Technology, Diversity Transmitter, DDIVERSITY and DPBT. The BTSs not included above do not support the RF tranmsit modes listed above.NoneAllow Shutdown of TRX Power AmplifierTRxYesNoThis parameter specifies whether the BSC determines to enable or disable the power amplifier of a TRX based on the traffic volume.NoneAntenna Hopping IndexTRxNoNoThis parameter specifies the following: When the antenna hopping function is used, the signals of one TRX can switch between different antennas instead of one TRX corresponding to one antenna. Therefore, the signals on certain frequencies are less affected by Rayleigh fading compared with those without antenna hopping. The Antenna Hopping Index corresponds to a TRX number.NonePower FinetuneTRxDefaultDefaultThis parameter specifies the following: Currently, when the BSC performs the static power control on the TRX, the step of increasing or reducing the power of the TRX is 2 dB. In some scenarios, the TRX has different losses if it is combined on different tributaries, and the output power difference before and after the combination is not an integral multiple of 2 dB. Thus, the cabinet top output power of the BTS cannot be adjusted in the step of 2 dB, so the TRX output power may be different from the cabinet top output power of the BTS. Therefore, through the setting of this parameter, a finer step can be provided for adjusting the cabinet top output power of the BTS.If this parameter is set to a too great or too small value, the cabinet top output power of the BTS is different from the TRX output power, resulting in the failure of channel allocation.TRX Antenna HoppingTRxNoneNoneThis parameter specifies whether the TRX supports antenna hopping. In a GSM cell, the frequency, frame number, system information, and paging group are transmitted on the BCCH of the main BCCH TRX. If the MS is in an unfavorable position or the antenna for the main BCCH TRX is faulty, then the MS cannot receive the broadcast control messages from the main BCCH TRX properly. The antenna hopping function enables the data on all the timeslots of the BCCH TRX to be transmitted on the antennas of all the TRXs in the cell in turn. Thus the quality of the BCCH TRX data received by the MS is improved and the network performance is enhanced. Only the double-transceiver BTS can be configured with the antenna hopping function.NoneReverse Out-BSC Slot No.TRx255255This parameter specifies the number of the out-BSC slot where the BSC interface board is located when the BTS works in reverse link mode. That is, the number of the slot that holds the interface board, which connects the BTS to the BSC.This parameter can be modified according to the actual requirements. However, it must be set to the number of the slot that is configured with the interface board.This parameter is to be viewed only.Reverse Out-BSC Port No.TRx255255This parameter specifies the number of the out-BSC port where the BSC interface board is located when the BTS works in reverse link mode. That is, the number of the port on the interface board that connects the BTS to the BSC.When the monitoring timeslot is configured on the electrical interface board, each electrical interface board is configured with 32 E1 ports, which are numbered from 0 to 31.When the monitoring timeslot is configured on the optical interface board, each optical interface board is configured with 63 E1 ports, which are numbered from 0 to 62.This parameter is to be viewed only.Reverse Out-BSC Timeslot No.(8K)TRx255255If the reverse ring of the BTSs functions, this parameter specifies the number of the RSL timeslot on the GEIUB/GOIUB/GEHUB port.NoneReverse RSL In Site Port No.TRx255255If the reverse ring of the BTSs functions, this parameter specifies the number of the port occupied by the LAPD link corresponding to the RSL link on the Abis interface.NoneReverse RSL In Site Timeslot No.(8K)TRx255255If the reverse ring of the BTSs functions, this parameter specifies the number of the timeslot occupied by the LAPD link corresponding to the RSL link on the Abis interface.NoneTransmission Type of Abis InterfaceTRxTDMTDMThis parameter specifies the transmission bearer mode of a TRX: 0-TDM, 1-HDLC, 2-HDLC_HUB, or 3-IP.NoneMaximum PDCH numbers of carrierTRx88This parameter specifies the maximum number of PDCHs allocated to a TRX.NoneMaxAbisTSOccupiedTRx3232This parameter specifies the maximum number of Abis timeslots occupied by the PDCHs on a TRX.NoneCo-TRX for Dynamic Transmission Diversity(PBT)TRx255255This parameter specifies the number of the TRX that supports the PBT together with the current TRX. When this parameter is set to the default value 255, you can infer that no TRX supports the PBT together with the current TRX.NoneInHDLCIndexTRx6553565535This parameter specifies the index of the in-BTS HDLC channel. The in-BTS HDLC channel connects to the BTS TMU.NoneHubHDLCIndexTRx6553565535This parameter specifies the index of an HDLC channel between the PEU and the PTU.NoneTRXNoInHubTRx255255This parameter specifies the unique number of a TRX in the HUB domain in HUB HDLC transmission mode.NoneXPUSlotNoTRx00This parameter specifies the number of the slot where the GXPUM (processing the RSL signaling) is located.There are two types of slot number: logical slot number and physical slot number. When configuring RSL links, set this parameter to the logical slot number of the GXPUM.TRX AbilityTRx1PhysicalPassNoTRx1PriorityTRxNONEThis parameter specifies the priority of the clock reference source.This parameter need not be set when the Work Mode is set to Auto.You must set this parameter when the Work Mode is set to Manual. When the Work Mode is set to Free-run, this parameter is 0.QTRU PriorityTRx255RevInHDLCIndexTRx6553565535This parameter specifies the HDLC channel index of reverse link in an HDLC ring network.NoneTime Slot Power RerserveTRx00This parameter specifies the allowed power difference between the maximum output power of the QTRU and the maximum nominal output power.NoneAllow Dynamic Voltage AdjustmentBasic_ParameterYesYesThis parameter specifies whether to select different working voltages for the TRX power amplifier in a cell based on different TRX modulation modes.NoneAllow Dynamic Shutdown of TRX Power AmplifierBasic_ParameterYesYesThis parameter specifies whether the BSC determines to enable or disable the power amplifier of a TRX based on the traffic volume.NoneMAX TA(bit period(1 bit=0.55km))Basic_Parameter6362This 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.The value of this parameter correlates with Cell ExtType. If this parameter is set to a too small value, the handover success rate may be affected.DMAXmsMaxDistanceInCallSetupTA2550...255DL DTXBasic_ParameterNo (tunable based on performance)YesThis parameter specifies whether to enable the DTX function in a cell.The discontinuous transmission (DTX) function allows a transmitter to stop power transmission in the case of no voice transfer. This function has the following benefits: 1. On the uplink: decreasing the power consumption of the MS and reducing system interference 2. On the downlink: decreasing power consumption of the BTS, reducing system interference, and reducing intermodulation inside the BTS3. From the network perspective, the inter-frequency interference is reduced and the network quality is improved. The DL DTX function is also restricted by the MSC.To enable this function, the DTX function must be enabled on the MSC side. If downlink DTX is disabled on the MSC side, downlink DTX cannot be used irrespective of the setting of this parameter. If downlink DTX is enabled on the MSC side, the setting of this parameter determines whether downlink DTX is used in a cell.DOWNLINK DTXEncryption AlgorithmBasic_Parameter000000011This 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.NoneDL PC AllowedBasic_ParameterYesYesThis parameter specifies whether the adjustment of the BTS power is allowed..NoneUL PC AllowedBasic_ParameterYesYesThis parameter specifies whether the adjustment of the MS power is allowed.NoneDirect RetryBasic_ParameterYesYesThis 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.NoneDRdrInUseNYes/NoTCH Immediate AssignmentBasic_ParameterNoNoIf 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.NoneRXLEV_ACCESS_MINBasic_Parameter18This 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).If the value of this parameter is too small, the required level of received signals is low. Therefore, many MSs attempt to camp on the cell, thus increasing the load of the cell and the risk of call drops. In such a case, you must set the parameter based on the balance conditions of the uplink and downlink levels.RXPrxLevAccessMindBm-105-110...-47Call Reestablishment ForbiddenBasic_ParameterYesYesThis 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.The average call drop rate decreases if call reestablishment is allowed. If this parameter is set to No, the average call drop rate decreases. In suburban areas and urban areas with poor coverage, this parameter should be set to No. Call reestablishment lasts for a long time, and therefore the subscriber cannot wait and hooks on. It is recommended that this parameter be set to Yes.REcallReestablishmentAllowedNYes/NoUL DTXBasic_ParameterShall UseShall UseThis parameter specifies whether to allow the MS to use the Discontinuous Transmission (DTX) function. For details, see GSM Rec. 05.08.The DTX function allows a transmitter to stop power transmission in the case of no voice transfer. This function has the following benefits: 1. On the uplink: decreasing the power consumption of the MS and reducing system interference 2. On the downlink: decreasing power consumption of the BTS, reducing system interference, and reducing intermodulation inside the BTS3. From the network perspective, the inter-frequency interference is reduced and the network quality is improved.DTXdtxMode20...2GSM900 Band Traffic Load Share ThresholdCH_MGT2525This parameter specifies: for the channel assignment, suppose the MS supports multiple sub frequency bands of the 900 MHz frequency band. The BSC ignores the priority of P-GSM/E-GSM/R-GSM sub frequency bands if the cell load is smaller than and equal to this threshold. The BSC assigns channels on the TRXs with priority of R-GSM, E-GSM, P-GSM frequency bands if the cell load is greater than this threshold. That is, the BSC preferentially assigns channels on the R-GSM TRXs if the MS supports P-GSM/E-GSM/R-GSM sub frequency bands and the cell is configured with TRXs operating on the P-GSM/E-GSM/R-GSM sub frequency bands.NoneChannel Assignment Allowed for Insufficient PowerCH_MGTNoYesThis parameter determines when the channel is assigned on the QTRU: When the channel is assigned on the QTRU board by using the dynamic power sharing algorithm, and when the remaining power of QTRU board is less than the call required power of cell, If this switch is set to Yes, this is allowed to assign the channel; otherwise, this is not allowed to assign the channel.NoneQtru Down Link Path Loss CompensationCH_MGT44The value of this parameter should be added in estimated power when the downlink path loss is estimated by the uplink path loss.NoneQtru Estimate Bts PowerCH_MGT3535This parameter specifies the downlink signal strength estimated by the QTRU power sharing algorithm together with downlink power control target threshold.The value of this parameter ranges from 0 to 63 (corresponding to -110 dBm to -47 dBm).NoneQtru Down Power Inadequate Last TimeCH_MGT33The P/N criterion determines whether the statistics time of QTRU downlink power is insufficient. This parameter corresponds to N of the P/N criterion.NoneQtru Down Power Inadequate Stat TimeCH_MGT55The P/N criterion determines whether the observation time of QTRU downlink power is insufficient. This parameter corresponds to P of the P/N criterion.NoneQtru Power SharingCH_MGTNoneNoneThis parameter specifies the following definitions:1. The QTRU power sharing algorithm is disabled.2. Static power sharing algorithm.3. Dynamic power sharing algorithm. The difference between static power sharing algorithm and dynamic power sharing algorithm is that the dynamic power sharing algorithm uses the MCPA power sharing technology, the static power specification is different from dynamic power specification. When there are several carriers, the maximum output power of single carrier in dynamic power specification is greater. In the network swapping, the static/dynamic power on the top of cabinet needs to compare with the competitor power on the top of cabinet. If the static power on the top of cabinet competitor power on the top of cabinet, the static power sharing algorithm is used; if the dynamic power on the top of cabinet competitor power on the top of cabinet static power on the top of cabinet, the dynamic power sharing algorithm is used.When the total power of the carrier on the single QTRU board exceeds the maximum permissible output power, the power sharing algorithm needs to be enabled. If the data configuration detects that the power sharing must be used, but the corresponding downlink power control of a cell is disabled. The power must be adjusted or the downlink power control must be enabled.Observed time of uplink received level differenceCH_MGT55If the uplink received level difference of calls in the same timeslot exceeds the Threshold of the difference between uplink received levels, the situation must be recorded. During the observation of P seconds, if this situation lasts N seconds, the call with the lowest uplink signal strength in the timeslot should be handed over to another timeslot.NoneDuration of uplink received level differenceCH_MGT44If the uplink received level difference of calls in the same timeslot exceeds the Threshold of the difference between uplink received levels, the situation must be recorded. During the observation of P seconds, if this situation lasts N seconds, the call with the lowest uplink signal strength in the timeslot should be handed over to another timeslot.NoneSmooth factor of uplink received levelCH_MGT66The value is 0-1 in fact; however, the data in the host and BSC should be simultaneously multiplied by 10 times to prevent the floating-point values.NoneThreshold of the difference between uplink received levelsCH_MGT100100This parameter specifies the QTRU signal merge algorithm, that is, the BSC monitors the high-level signal and overwhelms the low-level signal per 0.5 second. If the highest uplink signal strength of a timeslot the lowest uplink signal strength of this timeslot > Threshold of the difference between uplink received levels, the situation must be recorded.During the observation of P seconds, if this situation lasts N seconds, a forced handover is initiated on the calls with the highest uplink signal strength in the timeslot, and the calls should be handed over to another timeslot.P specifies the Observed time of uplink received level difference, and N specifies the Duration of uplink received level difference.NoneAllow Rate Selection Based on Overlaid/Underlaid Subcell LoadCH_MGTYesYesThis parameter specifies whether the BSC is allowed to assign the half-rate channels and full-rate channels to the MS according to the channel seizure ratio of the underlaid subcell and overlaid subcell.NoneTch Traffic Busy Underlay ThresholdCH_MGT5050The BSC assigns channels in the overlaid subcell to the MS in a concentric cell. If the channel seizure ratio of overlaid subcell is greater than the value of this parameter, half-rate channels are assigned. Otherwise, full-rate channels are assigned. Channel seizure ratio = (Num. of busy TCHF + Num. of busy TCHH/2)/ (Num. of available TCHF + Num. of available TCHH /2) x 100%. This parameter is valid for the concentric cell. When the Allow Rate Selection Based on Overlaid/Underlaid Subcell Load is set to Yes, the TCH Traffic Busy Threshold (%) is invalid for the concentric cell.If this parameter is set to a higher value, the half-rate channels are assigned to the MS only when the channel seizure ratio of overlaid subcell is very high. Insufficient half-rate channels can be assigned to the MS. Thus, the capacity of the BSC is reduced. If this parameter is set to a lower value, the half-rate channels are assigned to the MS only when the channel seizure ratio of overlaid subcell is very low. The calls use the half-rate channel even if there are enough full-rate channels, which influences the speech quality.Busy Threshold of TCH Traffic in Overlaid SubcellCH_MGT3050The BSC assigns channels in the overlaid subcell to the MS in a concentric cell. If the channel seizure ratio of overlaid subcell is greater than the value of this parameter, half-rate channels are assigned. Otherwise, full-rate channels are assigned. Channel seizure ratio = (Num. of busy TCHF + Num. of busy TCHH/2)/ (Num. of available TCHF + Num. of available TCHH /2) x 100%.This parameter is valid for the concentric cell. When the Allow Rate Selection Based on Overlaid/Underlaid Subcell Load is set to Yes, the TCH Traffic Busy Threshold (%) is invalid for the concentric cell.If this parameter is set to a higher value, the half-rate channels are assigned to the MS only when the channel seizure ratio of overlaid subcell is very high. Insufficient half-rate channels can be assigned to the MS. Thus, the capacity of the BSC is reduced. If this parameter is set to a lower value, the half-rate channels are assigned to the MS only when the channel seizure ratio of overlaid subcell is very low. The calls use the half-rate channel even if there are enough full-rate channels, which influences the speech quality.Flex HSN SwitchCH_MGTCloseCloseThis parameter specifies whether the dynamic HSN is permitted to be used. When the frequency hopping function and the FlexMAIO function are enabled in a cell, this parameter is set to YES. Thus, the inter-frequency interference among channels can be reduced. Only when the FlexMAIO is set to YES, this parameter can be configured.NoneHSN1hoppingSequenceNumber100...63/NFlex MAIO SwitchCH_MGTCloseCloseThis parameter specifies whether to enable Flex MAIO. In tight frequency resuse, the adjacent-channel interference and co-channel interference among channels occur. When the frequency hopping function and the FlexMAIO function are enabled in a cell, the inter-frequency interference among channels can be reduced partially. In the case of aggressive frequency reuse, the recommended value is set to Yes.NoneFLEXIBLE MAIO MANAGEMENTFix Abis Prior Choose Abis Load Threshold(%)CH_MGT8080This parameter specifies the static Abis resource load threshold. When the static Abis resource load is lower than Fix Abis Prior Choose Abis Load Thred(%), the full-rate channel is preferentially assigned. Otherwise, the full-rate or half-rate channel is preferred according to the dynamic Abis resource load.NoneFlex Abis Prior Choose Abis Load Threshold(%)CH_MGT8080When the static Abis resource load is higher than Fix Abis Prior Choose Abis Load Thred(%) and the dynamic Abis resource load is higher than Flex Abis Prior Choose Abis Load Thred(%), the half-rate channel is preferred. Otherwise, the full-rate channel is preferred.NoneTCH req suspend interval(s)CH_MGT6060This parameter specifies when the BSC fails to convert the dynamic PDCH back to the TCH, this operation is not performed during the period specified by this parameter. The parameter is valid for both built-in PCH and external PCU.NoneAMR TCH/H Prior Cell Load ThresholdCH_MGT240The channel type to be assigned is decided according to the channel types that are allowed by the MSC and the percentage of seized TCHs in the cell. During the channel assignment, the TCHF or TCCH, TCHH Prior channels are required in the following conditions: Half rate and full rate channels are allowed to be assigned by the MSC, the AMR TCH/H Prior Allowed is set to Yes, and the percentage of seized TCHs in the cell is greater than the value of AMR TCH/H Prior Cell Load Threshold. In other cases, the TCHF or TCCH, TCHF Prior channels are required. For details about cell load levels, refer to the Cell Load Threshold. Relevant algorithm: AMR call channel assignment algorithmsNoneAMR TCH/H Prior AllowedCH_MGTYesAs per planThis parameter specifies whether the TCH/H is preferentially assigned on the basis of the channel type and current service channel seizure ratio that are allowed by the MSC.During the channel assignment, the TCHF or TCCH, TCHH Prior channels are required in the following conditions: Half rate and full rate channels are allowed to be assigned by the MSC, the AMR TCH/H Prior Allowed is set to Yes, and the percentage of seized TCHs in the cell is greater than the value of AMR TCH/H Prior Cell Load Threshold. In other cases, the TCHF or TCCH, TCHF Prior channels are required.NoneUpdate Freq.of CH RecordCH_MGT22The updating of the history record starts when the Update Period of CH Record times out. Update Freq of CH Record is subtracted from the history priority of each channel to improve the priority of the channel.Principles of taking values are as follows: Generally, set this parameter to 2. If a fixed interference source exists or an equipment fault occurs, the update frequency for the affected cells can be set to 4 or 6. The Update Period of CH Record is used together with Update Freq of CH Record, In this way, the channel can be assigned even if the channel priority is continuously lowered within a period of time.NoneUpdate Period of CH Record(min)CH_MGT3030When the Update Period of CH Record expires, the process of updating the history record of channel occupancy is started. That is, the history priority of each channel is reduced by Update Freq.of CH Record at the interval of the setting value of this parameter to increase the channel priority.Principles of taking values are as follows: Generally, a high-frequency adjustment is used. For example, the update period should be set in such a way that it ranges from half an hour to one hour because several busy hours are the major concerns during the actual operation in a day. If the parameter is set to a too small value, the result of the history record is meaningless. If the parameter is set to a too great value, the result cannot be seen in time during busy hours. If a fixed interference source exists or an equipment fault occurs, the update period for the affected cells can be set in such a way that it ranges from several hours to one day. This parameter is used together with Update Freq. of CH Record so that the channel can be assigned even if the history record priority decreases.NoneFilter Length for SDCCH Qual.CH_MGT22This parameter specifies the number of measurement reports that are used to determine the signal quality on signaling channels. The signal quality on signaling channels should not be determined based on only one measurement result. To eliminate the influence of accidental factors, you need to obtain the average value of signal quality in several successive measurement reports of signaling channels, and then determine the signal quality on signaling channels.If this parameter is set to a higher value, the burst influence may be reduced but the judgment of channel status may not be in time. If this parameter is set to a lower value, the judgment is imprecise.Filter Length for SDCCH LevelCH_MGT2As per frequency planThis parameter specifies the number of measurement reports used for averaging the signal strength on the SDCCH.This parameter should be set to a small value because the SDCCH seizure duration is shorter than the TCH seizure duration for the MS.Filter Length for TCH Qual.CH_MGT66This parameter specifies the number of measurement reports that are used to clculate the signal quality on speech/data TCHs. The signal quality on TCHs should not be determined based on only one measurement result. To eliminate the influence of accidental factors, you need to obtain the average value of signal quality in several successive measurement reports of TCHs, and then determine the signal quality on speech/data TCHs.If this parameter is set to a higher value, the influence of accidental factors may be reduced but the judgment of channel status may not be in time. If this parameter is set to a lower value, the judgment is imprecise.Filter Length for TCH LevelCH_MGT64This parameter specifies the number of measurement reports used for averaging the speech/data TCH signal strength.This parameter helps to avoid sharp drop of signal levels caused by Raileigh Fading and to ensure correct handover decisions. When this parameter is set to a higher value, the impact of sudden changes is reduced, and the system response is delayed. Thus, the network performance is degraded.Interf.of DL Qual.ThresholdCH_MGT5040This parameter specifies one of the thresholds to determine whether the downlink interference is existed. The higher the level, the greater the signal strength is. The greater the value, the lower the signal quality is. If the downlink channel level is greater than or equal to the value of Interf of DL level Threshold and the quality grade of the uplink channel is greater or equal to the value Interf of DL Qual Threshold. The downlink interference occurs.If this parameter is set to a great value, the interference indication message will not be reported even though the interference exists. If this parameter is set to a small value, the interference indication message will be reported even though no interference exists.Interf.of DL Level ThresholdCH_MGT2525This parameter specifies one of the thresholds to determine whether the downlink interference is existed. The higher the level, the greater the signal strength is. The greater the value, the lower the signal quality is. If the downlink channel level is greater than or equal to the value of Interf of DL level Threshold and the quality grade of the uplink channel is greater or equal to the value Interf of DL Qual Threshold. The downlink interference occurs. The value range of Rank 0-63 corresponds to the range of -110 dBm to -47 dBm.If this parameter is set to a great value, the interference indication message will not be reported even though the interference exists. If this parameter is set to a small value, the interference indication message will be reported even though no interference exists.Interf.of UL Qual. ThresholdCH_MGT5040This parameter specifies one of the thresholds to determine whether the uplink interference is existed. The higher the level, the greater the signal is. The greater the value, the lower the quality is. If the uplink channel level is greater than or equal to the value of Interf of UL level Threshold and the quality grade of the uplink channel is greater or equal to the value Interf of UL Qual Threshold. The uplink interference occurs.If this parameter is set to a great value, the interference indication message will not be reported even though the interference exists. If this parameter is set to a small value, the interference indication message will be reported even though no interference exists.Interf.of UL Level ThresholdCH_MGT3010This parameter specifies one of the thresholds to determine whether the uplink interference is existed. The higher the level, the greater the signal is. The greater the value, the lower the quality is. If the uplink channel level is greater than or equal to the value of Interf of UL level Threshold and the quality grade of the uplink channel is greater or equal to the value Interf of UL Qual Threshold.this indicates the signal is good, but the quality is poor, that is, the uplink interference occurs. The value range of Rank 0-63 corresponds to the range of -110 dBm to -47 dBm.If this parameter is set to a great value, the interference indication message will not be reported even though the interference exists. If this parameter is set to a small value, the interference indication message will be reported even though no interference exists.History Record Priority AllowedCH_MGTYesYesThis parameter specifies whether the history record priority is considered in channel assignment. If this parameter is set to YES, the history record priority is effective. If this parameter is set to NO, the history record priority is ineffective. Usually this parameter is set to YES to select the channel with a high history record priority preferentially.NoneAllocation TRX Priority AllowedCH_MGTYesYesThis parameter specifies whether the TRX priority is considered during channel assignment. If this parameter is set to YES, the TRX priority factor is effective. If this parameter is set to NO, the TRX priority factor is ineffective. Usually, this parameter is set to YES to select the channel with a high TRX priority preferentially.NoneTRPtrxPriorityInTCHAlloc00...2Active CH Interf. Meas.AllowedCH_MGTYesYesThis parameter specifies whether the channel interference is considered in channel assignment. If this parameter is set to NO, the channel interference measurement is not performed and the interference indication is not sent. If this parameter is set to YES, the channel interference measurement is performed. If this parameter is set to YES, the channel with little interference is selected preferentially.NoneInterf. Priority AllowedCH_MGTYesYesThis parameter specifies whether the interference priority is considered during channel assignment. By default, this parameter is set to YES to select the channel with little interference.NoneTCH Traffic Busy Threshold(%)CH_MGT5050In Huawei II channel assignment algorithm, if the current channel seizure ratio reaches or exceeds this value, the half-rate TCH is assigned preferentially; otherwise, the full-rate TCH is assigned preferentially.NoneTIGHT BCCH SwitchCH_MGTNoNoThis parameter specifies whether to turn on the switch for the tight BCCH algorithm, and thus controls whether to enable the BCCH aggressive frequency reuse algorithm. Yes: Open No: CloseIt is recommended not to use the TIGHT BCCH algorithm in multiband network.Dynamic Transmission Diversity(PBT) SupportedCH_MGTNot SupportNot SupportThis parameter specifies whether the current cell supports the dynamic transmission diversity or dynamic PBT: 0: not supported 1: dynamic transmission diversity supported 2: dynamic PBT supportedNoneChannel Allocate StrategyCH_MGTCapability preferredCapability preferredThis parameter sets the priority of different types in channel allocation. These types include: Capacity with a higher priority Quality with a higher priority PS coordination with a relatively higher priority PS coordination with an absolutely higher priority The priority of different types is as follows: Priority by capacity: capacity factors > quality factors > PS cooperation factors > management factors Priority by quality: quality factors > capacity factors > PS cooperation factors > management factors Relative priority by PS domain: capacity factors > PS cooperation factors > quality factors > management factors Absolute priority by PS domain: PS cooperation factors > capacity factors > quality factors > management factorsNoneEnhanced TCH Adjust AllowedCH_MGTYesYesThis parameter specifies whether the combination of two half-rate TCHs into one full-rate TCH is allowed in a cell. If this parameter is set to No, the forced handover and call delay caused by timeslot arrangement can be avoided, but there may cause some TCHF-only calls to fail because the timeslot arrangement is unavailable. If this parameter is set to Yes, calls may fail when the timeslot arrangement fails and when the MS does not select the TCHF in the concentric cell.Huawei recommends that the parameter Enhanced TCH Adjust Allowed be set to No, the forced handover may fail in the concentric cell. In a normal cell, Huawei recommends that this parameter be set to Yes to ensure that the timeslot arrangement can be performed in the cell.TCH Minimum Recovery Time(s)CH_MGT6060This parameter specifies the minimum time for the recovery of a TCH from an SDCCH. The processing for the SDCCH recovered to the TCH is as follows: each cell is configured with a counter. Each time the TCH is converted to the SDCCH, the counter is set to ResTime. The value of the counter is adjusted every three seconds. If the number of idle SDCCHs > 8 + N1, the counter descreases by 3; if the number of idle SDCCHs < 8 + Idle SDCCH Threshold N1, the counter increases by 12 within the setting value; if the number of idle SDCCHs = 8 + N1, the counter remains unchanged. If the value of the counter is equal to or lower than 0 after adjustment, the SDCCH is converted to the TCH.If this parameter is set too small, it cannot correctly indicate the idle state of the current SDCCHs and consequently the rollback of SDCCHs immediately triggers adjustment and affects the network performance. If this parameter is set too large, the channel allocation algorithm becomes less sensitive and consequently the SDCCHs stay in idle state and cannot be rolled back for a long period of time.Cell SDCCH Channel MaximumCH_MGT8080When the BSC determines whether to initiate the conversion from the TCH to the SDCCH, it needs to determine whether the number of SDCCHs after the conversion exceeds the Cell SDCCH Channel Maximum. If the number of SDCCHs exceeds the value of this parameter, the BSC does not initiate the conversion.If this parameter is set too small, the SDCCHs in the cell may be insufficient and the dynamic adjustment cannot be initiated, thus affecting the access of users. It is meaningless to set the parameter too large.Idle SDCCH Threshold N1CH_MGT22If the number of idle SDCCHs in the cell is smaller than or equal to the value of this parameter, the BSC tries to find a TCHF that can be converted to the SDCCH. This parameter specifies one of the conditions for converting the TCHF to the SDCCH.Besides this parameter, the other three conditions for initiating the conversion from TCHFs to SDCCHs are as follows:1.The cell allows the SDCCH dynamic adjustment.2.(Number of idle TCHFs + number of idle TCHHs/2) 4 or the number of TRXs in the cell, and the cell must have at least one idle TCHF.3.The sum of the number of SDCCHs in the cell plus eight is smaller than the maximum number of SDCCHs allowed in the cell.If this parameter is set too large and consequently there is a small number of requests for SDCCHs, the SDCCHs of a cell are in idle state;If this parameter is set too small and consequently there is a large number of requests for SDCCHs, the requests cannot meet the requirements.AMR Starting Mode(H)Call_Control22This parameter specifies the coding rate adopted on a half-rate channel when a call is initially established. Since there are at most four coding rates in the ACS, this field have four values 0, 1, 2, and 3, representing the lowest, low, high, and highest coding rates in the ACS respectively.The AMR ACS (F/H) contains at most four coding rates. Therefore, the value of this parameter ranges from 0 to 3. The values 0 to 3 match those of the coding rates of AMR ACS (F/H).AMR DL Coding Rate adj.hyst3(H)Call_Control315Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRH3amrConfigurationHr: hysteresis30.5dB0015AMR DL Coding Rate adj.hyst2(H)Call_Control34Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRH2amrConfigurationHr: hysteresis20.5dB2015AMR DL Coding Rate adj.hyst1(H)Call_Control24Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRH1amrConfigurationHr: hysteresis10.5dB2015AMR DL Coding Rate adj.th3(H)Call_Control2663Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRTD3AMR DL Coding Rate adj.th2(H)Call_Control1826Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRTD2AMR DL Coding Rate adj.th1(H)Call_Control1216Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRTD1AMR UL Coding Rate adj.hyst3(H)Call_Control315Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRH3AMR UL Coding Rate adj.hyst2(H)Call_Control34Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRH2AMR UL Coding Rate adj.hyst1(H)Call_Control24Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRH1AMR UL Coding Rate adj.th3(H)Call_Control2663Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRTU3AMR UL Coding Rate adj.th2(H)Call_Control1824Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRTU2AMR UL Coding Rate adj.th1(H)Call_Control1214Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneHRTU1AMR ACS(H)Call_Control151101This parameter specifies the set of active coding rates. The active coding set (ACS) is a set of coding rates currently available for calls. Use a BIT map to present the speech coding rates contained in the ACS, wherein a BIT corresponds to a coding rate. If a bit is 1, the coding rate is included in the ACS. Otherwise, the ACS does not include the coding rate. The value of this parameter has five bits.Each bit indicates whether a coding rate is contained in the ACS. The five bits represent the coding rates from 7.40 kbit/s to 4.75 kbit/s (from left to right). Bit 1 means that the coding rate is contained in the ACS and bit 0 means that the coding rate is not contained in the ACS. One to four coding rates can be selected simultaneously. If only one coding rate is specified by this parameter, then the parameter AMR Starting Mode (H) must be set to 0, which means the lowest coding rate. All AMR coding rate adjustment thresholds (H) and AMR coding rate adjustment hystereses (H) are meaningless. If two coding rates are specified by this parameter, then AMR Starting Mode (H) can be set to 0 or 1. The parameters AMR UL Coding Rate adj.th1 (H), AMR UL Coding Rate adj.hyst1 (H), AMR DL Coding Rate adj.th1(H), and AMR DL Coding Rate adj.hyst1 (H) are meaningful. Other AMR coding rate adjustment thresholds (H) and AMR coding rate adjustment hystereses (H) are meaningless. If three coding rates are specified by this parameter, then AMR Starting Mode (H) can be set to 0, 1, or 2. The parameters AMR UL Coding Rate adj.th1 (H), AMR UL Coding Rate adj.hyst1 (H), AMR DL Coding Rate adj.th1(H), and AMR DL Coding Rate adj.hyst1 (H) are meaningful. Other AMR coding rate adjustment thresholds (H) and AMR coding rate adjustment hystereses (H) are meaningless. If four coding rates are specified by this parameter, then AMR Starting Mode (H) can be set to 0, 1, 2, or 3. All the AMR coding rate adjustment thresholds (H) and AMR coding rate adjustment hystereses (H) are meaningful.AMR Starting Mode(F)Call_Control22This parameter specifies the coding rate adopted on a full-rate channel when a call is initially established. Since there are at most four coding rates in the ACS, this field have four values 0, 1, 2, and 3, representing the lowest, low, high, and highest coding rates in the ACS respectively.The AMR ACS (F/H) contains at most four coding rates. Therefore, the value of this parameter ranges from 0 to 3. The values 0 to 3 match those of the coding rates of AMR ACS (F/H).AMR DL Coding Rate adj.hyst3(F)Call_Control33Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRH3AMR DL Coding Rate adj.hyst2(F)Call_Control33Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRH2AMR DL Coding Rate adj.hyst1(F)Call_Control22Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRH1AMR DL Coding Rate adj.th3(F)Call_Control2630Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRTD3AMR DL Coding Rate adj.th2(F)Call_Control1822Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRTD2AMR DL Coding Rate adj.th1(F)Call_Control12As per planBased on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRTD1AMR UL Coding Rate adj.hyst3(F)Call_Control31Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRH3AMR UL Coding Rate adj.hyst2(F)Call_Control32Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRH2AMR UL Coding Rate adj.hyst1(F)Call_Control22Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRH1AMR UL Coding Rate adj.th3(F)Call_Control26As per frequency planBased on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRTU3AMR UL Coding Rate adj.th2(F)Call_Control1818Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRTU2AMR UL Coding Rate adj.th1(F)Call_Control1212Based on the RQI in the call measurement report, the BTS and MS automatically adjust the current speech coding rate according to the related algorithm. The coding rate adjustment threshold is the threshold of RQI. The RQI indicates the carrier-to-interference ratio (CIR) of the call. If RQI equals 1, the CIR is 0.5 dB; if RQI equals 2, the CIR is 1 dB; and so forth. Since there are multiple coding rates in the ACS, there is an adjustment threshold and an adjustment hysteresis between the neighboring coding rates.NoneFRTU1AMR ACS(F)Call_Control16511100100This parameter specifies the set of active coding rates. The active coding set (ACS) is a set of coding rates currently available for calls. Use a BIT map to present the speech coding rates contained in the ACS, wherein a BIT corresponds to a coding rate. If a bit is 1, the coding rate is included in the ACS. Otherwise, the ACS does not include the coding rate. The value of this parameter has eight bits.Each bit indicates whether a coding rate is contained in the ACS. The eight bits represent the coding rates from 12.2 kbit/s to 4.75 kbit/s (from left to right). Bit 1 means that the coding rate is contained in the ACS and bit 0 means that the coding rate is not contained in the ACS. One to four coding rates can be selected simultaneously. If only one coding full rate is specified by this parameter, then AMR Starting Mode (F) must be set to 0. All the AMR coding rate adjustment thresholds and hysteresis are meaningless. If two coding rates are specified by this parameter, then AMR Starting Mode (F) can be set to 0 or 1. The parameters AMR UL Coding Rate adj.th1 (F), AMR UL Coding Rate adj.hyst1 (F), AMR DL Coding Rate adj.th1(F), and AMR DL Coding Rate adj.hyst1 (F) are meaningful. Other AMR coding rate adjustment thresholds and hysteresis are meaningless. If three coding rates are specified by this parameter, then AMR Starting Mode (F) can be set to 0, 1, or 2. The parameters AMR UL Coding Rate adj.th1 (F), AMR UL Coding Rate adj.hyst1 (F), AMR DL Coding Rate adj.th1(F), and AMR DL Coding Rate adj.hyst1 (F) are meaningful. Other AMR coding rate adjustment thresholds and hysteresis are meaningless. If four coding rates are specified by this parameter, then AMR Starting Mode (F) can be set to 0, 1, 2, or 3. All the AMR coding rate adjustment thresholds and hysteresis are meaningful.Max Assignment Retry TimesCall_Control21This parameter specifies the maximum number of reassignments after the assignment on the Um interface fails.If this parameter is set to a great value, the call completion rate of MSs is increased and the QoS of the network is improved. This, however, increases the load of the BSC.Frequency Band of ReassignCall_ControlTunableDifferent BandIn normal assignment procedure, after receiving the assignment failure message from the MS on the SDCCH, the BSC does not report the message to the MSC immediately. Instead, the BSC re-assigns radio channels and re-originates the assignment on the Um interface. Thus the success rate of assignment can be increased. Reassigning radio channels can be performed in the carriers with the same frequency band or of different frequency bands. If this parameter is set to Same Band, the frequency band of the preferentially reassigned channel is the same as what is used before the reassignment. If the parameter is set to Different Band, the frequency band of the preferentially reassigned channel is different from what is used before the reassignment. You can set this parameter to improve the deterioration of QoS caused by the interference, carrier channel fault, or engineering fault.To improve the success rate of reassignment, it is recommended that the default value Different Band be used. That is, the frequency band of the preferentially reassigned channel is different from what is used in the original assignment.Short Message Downlink DisabledCall_ControlNoNoThis parameter specifies whether to disable the sending of point-to-point short messages. In specific cells, sending point-to-point short messages on the downlink is disabled to ensure sufficient radio channels for calls.Pay special attention to the setting of this parameter during an upgrade. If receiving short messages is allowed, this parameter must be set to No. If this parameter is set to Yes, MSs cannot receive short messages.Immediate Assignment Opt.Call_ControlNoNoThe channel activation and immediate assignment commands are sent at the same time to accelerate the signaling processing rate, thus improving the response speed of the network.In satellite transmission mode, this function can be enabled to reduce the impact of the delay in satellite transmission on the signaling processing rate. For terrestrial transmission, the default value of this parameter is No.Abis Resource Adjustment TCHH Function SwitchCall_ControlNoNoThis 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(%).NoneAllow EMLPPCall_ControlNoNoThis 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.The eMLPP supports a maximum of seven priorities (A, B, and 0-4). The two highest priorities are reserved only for local use in the network. Priorities 0-4 are used for subscribers all over the world. If the eMLPP function needs to be fully implemented, the support of the MSC, HLR, MS (including SIM) is required.Allow ReassignCall_ControlYesYesThis parameter specifies whether to allow the reassignment function.If this parameter is set to Yes, the BSC initiates a re-assignment when receiving an assignment failure message from the Um interface. This helps to improve the call completion rate and the QoS of the network. If there are a large number of assignment failure messages, the BSC initiates many re-assignment procedures and thus the BSC load increases.TDD Cell ThresholdCall_Control3G Parameter0This parameter specifies the threshold for determining whether the MR about a TDD cell is valid. The measurement report is valid if the receive level of the TDD cell in the measurement report is greater than the value of this parameter.After the valid measurement report is filtered, the TDD cell joins in the cell prioritization.0: 0 dB1: 6 dB...6: 36 dB7: NoneTDD Cell offsetCall_Control3G Parameter0This parameter specifies the signal level offset of a TDD cell. Add the value of this parameter to the receive level of the TDD cell in the measurement report, and then sequence the TDD cells.0: 0 dB 1: 6 dB ...7: 42 dBNoneBest TDD Cell NumberCall_Control3G Parameter1This parameter specifies the number of UTRAN TDD cells that should be contained in the best cell list or in the measurement report.NoneTDD Cell Reselect Diversity(dB)Call_Control3G Parameter8A TDD cell can become a candidate cell only when the average receive level of the TDD cell is greater than the TDD Cell Reselect Diversity of the serving cell.0: - (always select a cell if acceptable)1: -28 dB2: -24 dB... 15: 28 dBNoneFDD Reporting ThresholdCall_Control3G Parameter0This parameter specifies the threshold for determining whether the MR about an FDD cell is valid. If the receive level of the 3G cell in the measurement report is greater than the value of this parameter, the measurement report is valid.After the valid measurement report is filtered, the 3G cell joins in the cell priority sequence.0: 0 dB1: 6 dB...6: 36 dB7: NoneFDD Reporting OffsetCall_Control3G Parameter0This parameter specifies the signal level offset of an FDD cell. When the priority of a 3G cell is sequenced, it is recommended that the value of this parameter be added to the receive level of the 3G cell in the measurement report.0: 0 dB 1: 6 dB ...7: 42 dBNone1800 Reporting ThresholdCall_Control3G Parameter0This parameter specifies the threshold for determining whether the MR about a DCS1800 cell is valid. If the receive level of the 1