PARAMETERS Add MA Group of Cell (ADD GCELLMAGRP)
HSN
Meaning: Hopping sequence number (HSN), indicating 64 types of frequency hopping sequences. If this parameter is set to 0, the frequency hopping is performed in sequence. If this parameter is set to a value from 1 to 63, the frequency hopping is performed in a pseudorandom manner that is a disciplinary random manner. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: None Default Value: 0 Recommended Value: 0
TSC
Meaning: The TSC is short for the Training Sequence Code. The TSC must be the same as the BCC. The delay equalization is performed by using the specified TSC when the MS or BTS receives the signal. The demodulation cannot be received because the delay equalization cannot be performed for the signals with same frequency using different TSCs. This can effectively prevent incorrectly invalid reception, and prevent the co-channel interference. GUI Value Range: 0~7 Actual Value Range: 0~7 Unit: None Default Value: None Recommended Value: None Set Device Attributes of TRX (SET GTRXDEV) 1. If a cell does not support the EDGE TRX, the value of "TRX 8PSK level" must be "0" and cannot be changed.
Power Level
Meaning: This 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. GUI Value Range: 0~21 Actual Value Range: 0~21 Unit: None Default Value: None Recommended Value: None
PARAMETERS
Power Type
Meaning: This parameter specifies the maximum transmit power supported by TRX. GUI Value Range: Normal (Normal), High (High) Actual Value Range: Normal, High Unit: None Default Value: None Recommended Value: None
TRX Priority
Meaning: This parameter specifies the TRX priority in channel assignment. The smaller this parameter is, the higher the TRX priority is. For two TRXs with other conditions identical, channels on the TRX with higher priority are preferentially assigned. GUI Value Range: L0(Level0), L1(Level1), L2(Level2), L3(Level3), L4(Level4), L5(Level5), L6(Level6), L7(Level7) Actual Value Range: L0, L1, L2, L3, L4, L5, L6, L7 Unit: None Default Value: None Recommended Value: L0
Shut Down Enable
Meaning: This parameter specifies whether the BSC6900 automatically shuts down the power amplifier of the TRX to save power when the BTS is powered by batteries after a power failure. GUI Value Range: DISABLE(Disable), ENABLE(Enable) Actual Value Range: DISABLE, ENABLE Unit: None Default Value: None Recommended Value: ENABLE
TCH Rate Adjust Allow
Meaning: Whether to allow the cell to dynamically change a channel from full rate to half rate or from half rate to full rate. If this parameter is set to YES, the conversion is allowed; if the parameter is set to NO, the conversion is not allowed and the changed channel is restored to the previous rate mode. In addition, this parameter helps to determine the channel assignment priority. The channels in a TRX that does not allow dynamic adjustment take priority. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: NO
PARAMETERS
TRX 8PSK Level
Meaning: Power attenuation level of the EDGE TRX. There are 50 power attenuation levels. At each level, the power is attenuated by 0.2 dB. The spectrum requirements are met only when the power of an EDGE transceiver for transmitting 8PSK signals is lower than the average power for GMSK modulation. GUI Value Range: 0~50 Actual Value Range: 0~10, step: 0.2 Unit: dB Default Value: None Recommended Value: 0
Power Finetune
Meaning: Finetune of the TRX power. During the static finetune of the TRX power, the BSC adjusts the TRX power at a step of 0.2 dB. In some scenarios, the losses vary depending on the tributaries where the power is combined, and the power difference before and after the power output is not an integral multiple of 2 dB. As a result, the cabinet-top output power cannot be adjusted at a step of 2 dB, and the TRX output power cannot be consistent with the cabinet-top output power. Therefore, this parameter provides a smaller step that can adjust the cabinet-top output power. GUI Value Range: DB0(0.0dB), DB2(-0.2dB), DB4(-0.4dB), DB6(-0.6dB), DB8(-0.8dB), DB10(-1.0dB), DB12(-1.2dB), DB14(-1.4dB), DB16(-1.6dB), DB18(-1.8dB), Default(Default) Actual Value Range: DB0, DB2, DB4, DB6, DB8, DB10, DB12, DB14, DB16, DB18, Default Unit: None Default Value: None Recommended Value: Default
Receive Mode
Meaning: RF receiving mode of the TRX GUI Value Range: INDEPENDENT(Independent Receiver), DIVIDING(Dividing Receiver), FOURDIVERSITY(Four Diversity Receiver), MAINDIVERSITY(Main Diversity), NONE(none) Actual Value Range: INDEPENDENT, DIVIDING, FOURDIVERSITY, MAINDIVERSITY, NONE Unit: None Default Value: None Recommended Value: None
Send Mode
Meaning: RF transmission mode of the TRX GUI Value Range: NOCOMB(NoCombin), PBT(PBT), WBANDCOMB(WideBandCombin), DIVERSITY(DiversityTransmit), DDIVERSITY(DDiversityTransmit), DPBT(DPBT), DTIC(TransIndependOrCombin), NONE(none) Actual Value Range: NOCOMB, PBT, WBANDCOMB, DIVERSITY, DDIVERSITY, DPBT, DTIC, NONE
PARAMETERS Unit: None Default Value: None Recommended Value: None
Allow Dynamic Shutdown of TRX
Meaning: This parameter specifies whether to allow the BSC6900 to enable or disable the power amplifier of a TRX based on the traffic volume. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: NO
Timeslot Power Reserve
Meaning: Maximum degree by which the output power of the multi-density TRX board can exceed the maximum output power within a short time GUI Value Range: 0~50 Actual Value Range: 0~50 Unit: W Default Value: None Recommended Value: If the board is configured with two to four TRXs, the recommended value of this parameter is 20. If the board is configured with five TRXs, the recommended value of this parameter is 50. If the board is configured with six TRXs, the recommended value of this parameter is 48.
Frequency Reuse Mode
Meaning: Frequency multiplexing mode in the TRX. To enable a loose frequency multiplexing mode such as 4x3 multiplexing, set this parameter to LOOSE. To enable a tight frequency multiplexing mode such as 1x3 or 1x1, set this parameter to TIGHT. GUI Value Range: LOOSE(Loose), TIGHT(Tight) Actual Value Range: LOOSE, TIGHT Unit: None Default Value: None Recommended Value: LOOSE
Priority of Shut Down TRX
Meaning: Priority level at which the BSC shuts down the power amplifier of the TRX when the intelligent shutdown function is enabled. If this parameter is set smaller, the priority level is higher, the power amplifier of the TRX is shut down later.
PARAMETERS GUI Value Range: L0(Level0), L1(Level1), L2(Level2), L3(Level3), L4(Level4), L5(Level5), L6(Level6), L7(Level7) Actual Value Range: L0, L1, L2, L3, L4, L5, L6, L7 Unit: None Default Value: None Recommended Value: L0
Power Overload Threshold In HO Out
Meaning: Power overload threshold for triggering outgoing handover from the TRX under the prerequisite that the power amplifier of the TRX provides the maximum output power. If the power overload exceeds this threshold, the TRX triggers outgoing handover for lack of power. GUI Value Range: 0~50 Actual Value Range: 0~50 Unit: W Default Value: None Recommended Value: 15
Power Overload Threshold In HO In
Meaning: Power overload threshold for triggering incoming handover to the TRX under the prerequisite that the power amplifier of the TRX provides the maximum output power. GUI Value Range: 0~50 Actual Value Range: 0~50 Unit: W Default Value: None Recommended Value: 8 Set Advanced Channel Management Parameters of Cell (SET GCELLCHMGAD)
TCH Traffic Busy Threshold
Meaning: 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. GUI Value Range: 0~100 Actual Value Range: 0~100 Unit: per cent Default Value: None Recommended Value: 60
Interf. Priority Allowed
Meaning: Whether to consider interference priorities during channel assignment
PARAMETERS GUI Value Range: NO (No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Active CH Interf. Meas.Allow
Meaning: Whether to measure the channel interference during channel assignment. If this parameter is set to NO, the BSC does not measure the channel interference or send an interference indication during channel assignment. If this parameter is set to YES, the BSC measures the channel interference during channel assignment. GUI Value Range: NO (No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Allocation TRX Priority Allowed
Meaning: This parameter specifies whether the TRX priority is considered during channel assignment. When the parameter is set to YES, the smaller the parameter TRX Priority in the command SET GTRXDEV is, the higher priority the TRX is. Under other conditions, channels are preferentially allocated from high-priority TRXs. GUI Value Range: NO (No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
History Record Priority Allowed
Meaning: Whether to consider history priority records during channel assignment. If this parameter is set to YES, the history priority records are considered. If this parameter is set to NO, the history priority records are not considered. GUI Value Range: NO (No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Balance Traffic Allowed
PARAMETERS Meaning: If this parameter is set to YES, the channel assignment algorithm II randomly selects the start range for channel traversal; otherwise, the algorithm selects the channel next to the channel assigned last time as the start point of channel traversal. GUI Value Range: NO (No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Interf. of UL Level Threshold
Meaning: One of the thresholds to determine whether the uplink interference exists. If the uplink level is not smaller than Interf.of UL Level Threshold and the uplink quality of the channel is not less than Interf.of UL Qual. Threshold, the uplink interference exists. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: None Recommended Value: 30
Interf. of UL Qual Threshold
Meaning: One of the thresholds to determine whether the uplink interference exists. If the uplink level is not smaller than Interf.of UL Level Threshold and the uplink quality of the channel is not less than Interf.of UL Qual. Threshold, the uplink interference exists. GUI Value Range: 0~70 Actual Value Range: 0~70 Unit: None Default Value: None Recommended Value: 40
Interf. of DL Level Threshold
Meaning: Threshold for determining whether downlink interference exists. If the downlink level is equal to or greater than Interf.of DL Level Threshold and the downlink quality level is equal to or greater than Interf.of DL Qual.Threshold, downlink interference exists. The value range 0 to 63 is mapped to the range -110 dBm to -47 dBm. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: None Recommended Value: 35
PARAMETERS
Interf. of DL Qual Threshold
Meaning: Threshold for determining whether downlink interference exists. If the downlink level is equal to or greater than Interf.of DL Level Threshold and the downlink quality level is equal to or greater than Interf.of DL Qual.Threshold, downlink interference exists. GUI Value Range: 0~70 Actual Value Range: 0~70 Unit: None Default Value: None Recommended Value: 40
Filter Length for TCH Level
Meaning: When the network receives measurement reports, the measurement values in several straight measurement reports are filtered to reflect the radio operating environment for the sake of accuracy. This parameter specifies the number of successive measurement reports that are used to determine the signal strength on traffic/data channels. GUI Value Range: 1~32 Actual Value Range: TCH:480~15360, step:480; SDCCH:470~15040, step:470 Unit: ms Default Value: None Recommended Value: 6
Filter Length for TCH Qual
Meaning: For the purpose of accurately reflecting the radio environment of a network, filtering is performed on the measured values in several consecutive measurement reports. This parameter indicates the number of measurement reports used for the filtering of the signal quality on service or data channels. This parameter is used to determine whether interferences exist on channels. GUI Value Range: 1~32 Actual Value Range: TCH:480~15360, step:480; SDCCH:470~15040, step:470 Unit: ms Default Value: None Recommended Value: 6
Filter Length for SDCCH Level
Meaning: When the network receives measurement reports, the measurement values in several straight measurement reports are filtered to reflect the radio operating environment for the sake of accuracy. The parameter specifies the number of successive measurement reports that are used to determine the signal strength on signaling channel. GUI Value Range: 1~32 Actual Value Range: TCH:480~15360, step:480; SDCCH:470~15040, step:470 Unit: ms
PARAMETERS Default Value: None Recommended Value: 2
Filter Length for SDCCH Qual
Meaning: For the purpose of accurately reflecting the radio environment of a network, filtering is performed on the measured values in several consecutive measurement reports. This parameter indicates the number of measurement reports used for the filtering of the signal quality on signaling channels. This parameter is used to determine whether interferences exist on channels. GUI Value Range: 1~32 Actual Value Range: TCH:480~15360, step:480; SDCCH:470~15040, step:470 Unit: ms Default Value: None Recommended Value: 2
AMR TCH/H Prior Allowed
Meaning: Whether to enable the BSC to assign AMR half rate channels preferentially according to the channel types allowed by the MSC and the current TCH seizure ratio of the cell GUI Value Range: OFF(Off), ON(On) Actual Value Range: OFF, ON Unit: None Default Value: None Recommended Value: ON
AMR TCH/H Prior Cell Load Threshold
Meaning: Load threshold for assigning half rate channels preferentially. If the current TCH seizure ratio of the cell is greater than this threshold, AMR half rate channels are assigned preferentially. GUI Value Range: 0~99 Actual Value Range: 0~99 Unit: per cent Default Value: None Recommended Value: 55
TCH Traffic Busy Overlay Threshold
Meaning: The 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
PARAMETERS Rate Selection Based on Overlaid/Underlaid Subcell Load is set to Yes, the TCH Traffic Busy Threshold (%) is invalid for the concentric cell. GUI Value Range: 0~100 Actual Value Range: 0~100 Unit: per cent Default Value: None Recommended Value: 70
TCH Traffic Busy Underlay Threshold
Meaning: Threshold for determining that the underlaid subcell is busy. The BSC assigns channels in the underlaid subcell to the MS in a concentric cell. When Allow Rate Selection Based on Overlaid/Underlaid Subcell Load is set to YES, half-rate channels are assigned if the channel seizure ratio in the underlaid subcell exceeds the value of this parameter, and full-rate channels are assigned if the channel seizure ratio in the underlaid subcell does not exceed the value of this parameter. GUI Value Range: 0~100 Actual Value Range: 0~100 Unit: per cent Default Value: None Recommended Value: 60
Load of UL-OL Cells Rate Sellect Allowed
Meaning: Whether to enable the BSC to assign half or full rate channels to MSs according to the channel seizure ratio in the overlaid and underlaid subcells GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Smooth Factor of Uplink Receive Level
Meaning: After the existing uplink receive level, uplink receive level after the previous optimization, and the value of this parameter are weight-averaged, the uplink receive level after the optimization at this time is obtained and used for determing the difference between the uplink receive levels. GUI Value Range: 1~10 Actual Value Range: 0.1~1, step:0.1 Unit: None Default Value: None Recommended Value: 6
PARAMETERS
Duration of Uplink Receive Level Differ
Meaning: If the difference between uplink receive levels of calls within the same timeslot is greater than Offset of the difference between uplink received levels for P seconds among N seconds, the call with weak uplink receive level within the timeslot will be handed over to another timeslot. This parameter corresponds to P in the P/N criterion. GUI Value Range: 1~16 Actual Value Range: 1~16 Unit: s Default Value: None
Observe Time of UL RX Level Difference
Meaning: If the difference between uplink receive levels of calls within the same timeslot is greater than Offset of the difference between uplink received levels for P seconds among N seconds, the call with weak uplink receive level within the timeslot will be handed over to another timeslot. This parameter corresponds to N in the P/N criterion. GUI Value Range: 1~16 Actual Value Range: 1~16 Unit: s Default Value: None Recommended Value: 5
Multi-Density TRX Power Sharing
Meaning: Whether to use the statistical multiplexing algorithm for multi-density power GUI Value Range: NONE(None), DYNAMIC(Dynamic power sharing) Actual Value Range: NONE, DYNAMIC Unit: None Default Value: None Recommended Value: NONE
Qtru Down Power Inadequate Stat Time
Meaning: The P/N criteria is used to determine low downlink power for multi-density carriers. If the downlink power of a multi-density carrier remains low during a consecutive P seconds out of N seconds, the downlink power of the multi-density carrier is considered low. This parameter corresponds to the N in the P/N criteria. GUI Value Range: 1~16 Actual Value Range: 1~16 Unit: s Default Value: None Recommended Value: 5
PARAMETERS
Qtru Down Power Inadequate Last Time
Meaning: The P/N criteria is used to determine low downlink power for multi-density carriers. If the downlink power of a multi-density carrier remains low during a consecutive P seconds out of N seconds, the downlink power of the multi-density carrier is considered low. This parameter corresponds to the P in the P/N criteria. GUI Value Range: 1~16 Actual Value Range: 1~16 Unit: s Default Value: None Recommended Value: 3
Power Priority Allowed
Meaning: When this parameter is set to YES, The BSC preferentially uses the TRX with good powersaving performance according to the TRX power priority reported by the BTS. Smaller priority value indicates better power saving quality. If the priority is of a great value, the BTS closes TRXs late. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Level Thresh for Assign BCCH Under TBCCH
Meaning: During channel assignment, the assignment of channels on the BCCH TRXs depends on the uplink receive level, quality, and non-BCCH load. The TCHs are preferentially assigned on the BCCH TRXs if the following conditions are met: 1. The uplink receive level after filtering is higher than Level Thresh. for Assigning Main BCCH Carrier Channel Under TIGHT BCCH. 2. The uplink receive quality level after filtering is lower than Quality Thresh. for Assigning Main BCCH Carrier Channel Under TIGHT BCCH. 3. The non-BCCH load is higher than Intracell Non Main BCCH Load Threshold of TIGHT BCCH. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: None Recommended Value: 30
Quality Thresh for Assign BCCH Under TBCCH
PARAMETERS Meaning: During channel assignment, the assignment of channels on the BCCH TRXs depends on the uplink receive level, quality, and non-BCCH load. The TCHs are preferentially assigned on the BCCH TRXs if the following conditions are met: 1. The uplink receive level after filtering is higher than Level Thresh. for Assigning Main BCCH Carrier Channel Under TIGHT BCCH. 2. The uplink receive quality level after filtering is lower than Quality Thresh. for Assigning Main BCCH Carrier Channel Under TIGHT BCCH. 3. The non-BCCH load is higher than Intracell Non Main BCCH Load Threshold of TIGHT BCCH. GUI Value Range: 0~7 Actual Value Range: 0~7 Unit: None Default Value: None Recommended Value: 1
Channel Assign Allow for Insuff Power
Meaning: Whether to allow a multi-density TRX board, that uses the dynamic power sharing algorithm to assign channels, to assign a channel to an MS when the remaining power on the multidensity TRX board is less than the power required by the MS. If this parameter is set to YES, a multidensity TRX board that uses the dynamic power sharing algorithm to assign channels cannot assign a channel to an MS when the remaining power on the multi-density TRX board is less than the power required by the MS.If this parameter is set to NO, a multi-density TRX board that uses the dynamic power sharing algorithm to assign channels can assign a channel to an MS when the remaining power on the multi-density TRX board is less than the power required by the MS. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: NO
GSM900 Band Traffic Load Share Threshold
Meaning: Threshold for load sharing in the 900 MHz frequency band. Assume that an MS supports multiple sub-bands in the 900 MHz frequency band. If the cell load is equal to or less than this threshold, the BSC does not consider the priority levels of the P-GSM, E-GSM, and R-GSM sub-bands during channel assignment. If the cell load is greater than this threshold, the BSC assigns channels according to the priority levels of the P-GSM, E-GSM, and R-GSM sub-bands. That is, if the MS supports the P-GSM, E-GSM, and R-GSM sub-bands and the cell is configured with the TRXs in the PGSM, E-GSM, and R-GSM sub-bands, the BSC assigns the channels in the TRXs of the R-GSM subband preferentially. GUI Value Range: 0~100 Actual Value Range: 0~100 Unit: per cent Default Value: None Recommended Value: 25
PARAMETERS
Assign Non-AMR User Loose Fre. Reuse TRX
Meaning: Whether to preferentially allocate loose multiplexing frequencies to non-AMR users GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: NO
Allocate OL Channel Based on RX Level
Meaning: Whether to assign overlay channels in an IUO cell based on the receive level conditions GUI Value Range: OFF(Off), ON(On) Actual Value Range: OFF, ON Unit: None Default Value: None Recommended Value: You are advised to disable this function in the co-BCCH cell with the inter-site distance not more than 1500m.
Assign to Overlayer Rxlev Offset
Meaning: Offset relative to the level threshold for determining whether to assign a channel in the overlaid subcell GUI Value Range: 0~61 Actual Value Range: 0~61 Unit: dB Default Value: None Recommended Value: 35
Handover to Overlayer RxLev Offset
Meaning: If the cell is an enhanced concentric cell, this parameter with the current downlink received signal level and UtoO HO Received Level Threshold determines whether to assign a channel in the underlaid subcell to the intra-BSC incoming handover to the concentric cell or intraBSC inter-cell handover. If the cell is an ordinary concentric cell, this parameter with the current downlink received signal level, RX_LEV Threshold, and RX_LEV Hysteresis determines whether to assign a channel in the underlaid subcell to the intra-BSC incoming handover to the concentric cell or intra-BSC inter-cell handover. GUI Value Range: 0~61 Actual Value Range: 0~61 Unit: dB Default Value: None
PARAMETERS Recommended Value: 32 Set Basic Channel Management Parameters of Cell (SET GCELLCHMGBASIC) Use this command to set the basic channel management parameters of a cell.
Idle SDCCH Threshold N1
Meaning: When the number of idle SDCCH channels in a cell is smaller than this parameter, the system searches for available TCHs and transforms them into SDCCH channels. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: None Default Value: None Recommended Value: 2
Cell SDCCH Channel Maximum
Meaning: Maximum number of SDCCHs in the cell. Before converting a TCH into an SDCCH, the BSC compares the number of SDCCHs after the conversion in the cell with Cell SDCCH Channel Maximum. If the number of SDCCHs after the conversion in the cell exceeds this parameter, the BSC does not convert the TCH into an SDCCH. GUI Value Range: 0~255 Actual Value Range: 0~255 Unit: None Default Value: None Recommended Value: 80
TCH Minimum Recovery Time
Meaning: Minimum time required for a TCH to transform to a SDCCH and then transform back to a TCH GUI Value Range: 60~3600 Actual Value Range: 60~3600 Unit: s Default Value: None Recommended Value: 60
Grade Access Allow
Meaning: Whether to allow hierarchical access and to reserve resources for high-priority MSs GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES
PARAMETERS Unit: None Default Value: None Recommended Value: NO
Highest Priority
Meaning: Maximum priority level of an MS that can use reserved channel resources. If the priority level of an MS is greater than this parameter, the MS is considered a low-priority MS. If the priority of an MS is equal to or less than this threshold, the MS is considered a high-priority MS. GUI Value Range: 1~14 Actual Value Range: 1~14 Unit: None Default Value: None Recommended Value: 1
Reserved Channel Number
Meaning: While assigning channels, the BSC ensures that the sum of the number of channels occupied by high-priority users and the number of idle channels reserved for high-priority users is no smaller than this parameter. Every time the BSC assigns channels to a user whose priority is lower than Highest Priority, it checks whether the sum of the number of channels occupied by users of Highest Priority and the number of idle channels is larger than the number of the reserved channels. If yes, the BSC normally assigns channels for the user; if not, the BSC does not assign a TCHF. GUI Value Range: 0~190 Actual Value Range: 0~190 Unit: None Default Value: None Recommended Value: 0
Enhanced TCH Adjust Allowed
Meaning: Whether to enable the cell to centralize two busy half rate TCHs in different timeslots into one timeslot through handover and then to combine the two idle half rate TCHs in the other timeslot into one full rate TCH dynamically GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: None
TIGHT BCCH Switch
PARAMETERS Meaning: Whether to enable the BCCH aggressive frequency reuse algorithm GUI Value Range: OFF(Off), ON(On) Actual Value Range: OFF, ON Unit: None Default Value: None Recommended Value: OFF
Dynamic Transmission Div Supported
Meaning: Whether to enable the cell to support dynamic transmit diversity or dynamic PBT GUI Value Range: NOTSUPPORT(Not Support), DDIVERSITY(DDIVERSITY), DPBT(DPBT) Actual Value Range: NOTSUPPORT, DDIVERSITY, DPBT Unit: None Default Value: None Recommended Value: NOTSUPPORT
Channel Allocate Strategy
Meaning: Channel assignment priority of the cell If this parameter is set to CAPABILITY, the factors are listed as follows in a descending order of priority: capacity factors, quality factors, PS cooperation factors, and management factors. If this parameter is set to QUALITY, the factors are listed as follows in a descending order of priority: quality factors, capacity factors, PS cooperation factors, and management factors. If this parameter is set to PSRELATIVELY, the factors are listed as follows in a descending order of priority: capacity factors, PS cooperation factors, quality factors, and management factors. If this parameter is set to PSABSOLUTELY, the factors are listed as follows in a descending order of priority: PS cooperation factors, capacity factors, quality factors, and management factors. GUI Value Range: CAPABILITY(Capability preferred), QUALITY(Quality preferred), PSRELATIVELY(PS relatively preferred), PSABSOLUTELY(PS absolutely preferred) Actual Value Range: CAPABILITY, QUALITY, PSRELATIVELY, PSABSOLUTELY Unit: None Default Value: None Recommended Value: CAPABILITY
Highest Priority User Quality First
Meaning: Whether to enable the priority-based channel assignment algorithm GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: NO
PARAMETERS
Highest Priority for Quality First
Meaning: Full rate TCHs are assigned preferentially to the MSs with priority levels equal to or less than this threshold, except when the MSs request only half or full rate TCHs. GUI Value Range: 1~14 Actual Value Range: 1~14 Unit: None Default Value: None Recommended Value: 1
Ratio of TCHH
Meaning: Maximum ratio of the number of half rate channels to the total number of channels in a cell. When the resource allocation principle is determined by the BSC, no half rate channel can be further assigned if the ratio of the number of half rate channels to the total number of channels in the cell is greater than or equal to the value of this parameter. When the resource allocation principle is not determined by the BSC, radio resource allocation does not depend on the setting of this parameter. Total number of channels = number of half rate channels + number of full rate channels x 2 GUI Value Range: 0~100 Actual Value Range: 0~100 Unit: per cent Default Value: None Recommended Value: 100
Ratio of AMR-HR
Meaning: Maximum ratio of the number of AMR half rate channels to the total number of channels in a cell. When the resource allocation principle is determined by the BSC, no AMR half rate channel can be further assigned if the ratio of the number of AMR half rate channels to the total number of channels in the cell is greater than or equal to the value of this parameter. When the resource allocation principle is not determined by the BSC, radio resource allocation does not depend on the setting of this parameter. Total number of channels = number of half rate channels + number of full rate channels x 2 GUI Value Range: 0~100 Actual Value Range: 0~100 Unit: per cent Default Value: None Recommended Value: 100
Max Channel Num Reserved for EC
Meaning: Maximum number of TCH channels reserved for emergency call users GUI Value Range: 0~190
PARAMETERS Actual Value Range: 0~190 Unit: None Default Value: None Recommended Value: 0
Different Band SDCCH Using Optimize
Meaning: Whether to allow an MS to report the classmark and whether to hand over the MS from the SDCCH in the frequency band for the main BCCH to the SDCCH in a different frequency band according to the classmark GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: NO
Factory Mode
Meaning: If this parameter is set to ON, the BSC assigns the channels in the TRXs of the cell in a polling manner. Therefore, each TRX has an even chance to be used. In this way, the connection between the TRX and the RF can be checked without manual dialing tests. GUI Value Range: OFF(Off), ON(On) Actual Value Range: OFF, ON Unit: None Default Value: None Recommended Value: None Set Idle Advanced Parameters of Cell (SET GCELLIDLEAD) Use this command to set advanced idle parameters of a cell.
Additional Reselect Parameter Indication
Meaning: Used for notifying MSs where to retrieve relevant parameters during cell reselection. The default value of this parameter is 0 in system message 3 and, has no special significance. In system message 4, if the value of this parameter is 0, it means that the MSs must retrieve the PI parameters and other parameters relevant to cell reselection and the parameters relevant to C2 calculation from the remaining bytes of system message 4.If the value is 1, it means that the MS must retrieve the parameters from the remaining bytes of system message 7 or 8. GUI Value Range: COMPUL0(Compulsory 0), COMPUL1(Compulsory 1), FLEX(Flexible) Actual Value Range: COMPUL0, COMPUL1, FLEX Unit: None Default Value: None
PARAMETERS Recommended Value: FLEX
Cell Reselect Temporary Offset
Meaning: Cell Reselect Temporary Offset (TO) indicates the temporary correction of C2. This parameter is valid only within the value specified by Cell Reselect Penalty Time. For details, see GSM Rec. 05.08 and 04.08. This parameter applies to only GSM Phase II MSs. GUI Value Range: 0~7 Actual Value Range: 0~7 Unit: None Default Value: None Recommended Value: 0
Cell Reselection Penalty Time
Meaning: Cell Reselect Penalty Time (PT) is used to ensure the safety and validity of cell reselection because it helps to avoid frequent cell reselection. For details, see GSM Rec. 05.08 and 04.08. GUI Value Range: 0~31 Actual Value Range: 0~31 Unit: s Default Value: None Recommended Value: 0
Shutdown TRX[Cell OOS]
Meaning: Shutdown TRX cell OOS GUI Value Range: DISABLE(Disable), ENABLE(Enable) Actual Value Range: DISABLE, ENABLE Unit: None Default Value: None Recommended Value: None
Shutdown TRX Time[s]
Meaning: Shutdown TRX Times. GUI Value Range: 0~1800 Actual Value Range: 0~1800 Unit: None Default Value: None Recommended Value: None Set Idle Basic Parameters of Cell (SET GCELLIDLEBASIC)
PARAMETERS Use this command to set basic call idle parameters of a cell. Note 1. When the cell broadcast service is supported and the CBCH is CBCH+SDCCH8, the value of "Num of CCCH blocks Rsved for AGCH" cannot be smaller than 1. 2. When the CCCH is configured as a combined CCCH, the value of "Num of CCCH blocks Rsved for AGCH" ranges from 0 to 2. Otherwise, it ranges from 0 to 7.
Attach-detach Allowed
Meaning: Attach-detach Allowed (ATT). If this parameter is set to YES, when an MS is powered off, the network does not process any call connection for the MS as a called party. In this way, the network processing time and resources are saved. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
TX-integer
Meaning: Tx-integer (T for short). This parameter specifies the number of timeslots between two transmissions when an MS sends multiple consecutive channel requests. The access algorithm is defined in GSM Rec. 04.08 to reduce the collisions on the RACH and improve the efficiency of the RACH. The algorithm specifies three parameters: Tx-integer (T for short), maximum number of retransmissions (RET), and S related to channel combination. This parameter works with the configuration of the CCCH to determine the parameter S. The relations between this parameter and the configuration of the CCCH are as follows: When this parameter is set to 3, 8, 14, or 50, S is 55 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 3, 8, 14, or 50, S is 41 if the CCCH and SDCCH share a physical channel. When this parameter is set to 4, 9, or 6, S is 76 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 4, 9, or 6, S is 52 if the CCCH and SDCCH share a physical channel. When this parameter is set to 5, 10, or 20, S is 109 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 5, 10, or 20, S is 58 if the CCCH and SDCCH share a physical channel. When this parameter is set to 6, 11, or 25, S is 163 if the CCCH and SDCCH do not share a physical channel. When this parameter is set to 6, 11, or 25, S is 86 if the CCCH and SDCCH share a physical channel. When this parameter is set to 7, 12, or 32, S is 217 if the CCCH and SDCCH do not share a physical channel.
PARAMETERS When this parameter is set to 7, 12, or 32, S is 115 if the CCCH and SDCCH share a physical channel. The timeslot for sending messages is a random value from the collection of {0, 1..., MAX(T, 8)-1}. The number of timeslots (excluding the timeslot used to send messages) between two adjacent channel request messages is a random value from the collection of {S, S+1, ..., S+T-1}. When T increases, the interval between two adjacent channel requests increases, and RACH conflicts decrease. When S increases, the interval between two adjacent channel request messages increases, and RACH conflicts decrease, thus improving the usage of AGCH and SDCCH. The access time of the MS, however, is prolonged and the network performance is decreased when T and S increase. Under normal conditions, an appropriate T value should be used to ensure that S is as low as possible, and ensure that AGCH and SDCCH are not overloaded. GUI Value Range: TX_3(3), TX_4(4), TX_5(5), TX_6(6), TX_7(7), TX_8(8), TX_9(9), TX_10(10), TX_11(11), TX_12(12), TX_14(14), TX_16(16), TX_20(20), TX_25(25), TX_32(32), TX_50(50) Actual Value Range: TX_3, TX_4, TX_5, TX_6, TX_7, TX_8, TX_9, TX_10, TX_11, TX_12, TX_14, TX_16, TX_20, TX_25, TX_32, TX_50 Unit: None Default Value: None Recommended Value: TX_32
Cell Bar Access
Meaning: Used together with Cell Bar Qualify to decide the priority status of a cell. Refer to GSM Rec. 04.08. Cell Bar Qualify Cell Bar Access Cell selection priority Cell reselection priority NO NO Normal Normal NO YES Prohibited Prohibited YES NO Low Normal YES YES Low Normal GUI Value Range: NO(NO), YES(YES) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: The CBA function applies to special scenarios. If this parameter is set to YES and Cell Bar Qualify is set to no, only handovers are allowed in a cell, and direct access of an MS is not allowed. This condition applies to a dual-network coverage cell. For a common cell, this parameter should be set to NO.
Cell Bar Quality
Meaning: Used together with Cell Bar Access to decide the priority status of a cell. See GSM Rec. 0408. This parameter does not affect cell reselection but cell selection only. Cell Bar Qualify Cell Bar Access Cell selection priority Cell reselection priority NO NO Normal Normal NO YES Prohibited Prohibited
PARAMETERS YES NO Low Normal YES YES Low Normal GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: NO
CCCH Blocks Reserved for AGCH
Meaning: BS-AG-BLKS-RES, indicating the number of the CCCH message blocks reserved for the AGCH. After the CCCHs are configured, the value of this parameter indicates the actual seizure rates of the AGCHs and the PCHs over the CCCHs. GUI Value Range: 0~7 Actual Value Range: 0~7 Unit: None Default Value: None Recommended Value: 1
Multi-Frames in a Cycle on the Paging CH
Meaning: Number of multiframes in a cycle on a paging sub-channel. In fact, this parameter specifies the number of paging sub-channels that a paging channel in a cell is divided into. In an actual network, an MS does not listen to other paging sub-channels but its belonging paging sub-channel only. Refer to GSM Rec. 05.02 and GSM Rec. 05.08. The larger the value of this parameter, the more the number of the paging sub-channels in a cell, and the fewer the number of the users belonging to each paging sub-channel. In this case, the mean uptime of the MS battery can be prolonged. Refer to the computing mode of paging group in GSM 05.02 of GSM Standards. The larger the value of this parameter, however, the larger the time delay of a paging message in a space segment. Thus, the average service performance of the system lowers. Based on the principle of ensuring that overload does not occur to paging channels, you must set this parameter to a value as small as possible. You must regularly measure the overload conditions of the paging channels in a running network and accordingly adjust the value of this parameter properly. A paging message in a location area must be sent in all the cells within this location area at the same time. Therefore, the capacity of a paging channel of each cell in a location area must be the same or nearly the same. The capacity refers to the calculated number of paging sub-channels of each cell. GUI Value Range: 2_M_PERIOD(2 Multiframe Period), 3_M_PERIOD(3 Multiframe Period), 4_M_PERIOD(4 Multiframe Period), 5_M_PERIOD(5 Multiframe Period), 6_M_PERIOD(6 Multiframe Period), 7_M_PERIOD(7 Multiframe Period), 8_M_PERIOD(8 Multiframe Period), 9_M_PERIOD(9 Multiframe Period) Actual Value Range: 940~4230, step: 470 Unit: ms Default Value: None Recommended Value: 2_M_PERIOD
PARAMETERS
T3212
Meaning: This parameter specifies the length of the timer for periodic location update. GUI Value Range: 0~255 Actual Value Range: 0~1530, step: 6 Unit: min Default Value: None Recommended Value: 20
Cell Reselection Hysteresis Parameter
Meaning: Cell reselection hysteresis. This is one of the parameters used for deciding whether to reselect cells in different location areas. This parameter can avoid the increase of network signaling traffic due to frequent location update and reduce the risk of losing paging messages. GUI Value Range: 0dB, 2dB, 4dB, 6dB, 8dB, 10dB, 12dB, 14dB Actual Value Range: 0dB, 2dB, 4dB, 6dB, 8dB, 10dB, 12dB, 14dB Unit: dB Default Value: None Recommended Value: 6dB
Cell Reselection Parameter Indication
Meaning: Cell Reselect Parameters Indication (PI), sent on the broadcast channel, indicates whether Cell Reselect Offset, Cell Reselect Temporary Offset in the SET GCELLIDLEAD command, and Cell Reselect Penalty Time are used. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
NCC Permitted
Meaning: A set of NCCs of the cells to be measured by the MS. This parameter is an information element (IE) in the system information type 2 and 6 messages. If a bit of the value of this parameter is set to 1, the MS reports the corresponding measurement report to the BTS. The value of this parameter has a byte (eight bits). Each bit maps with an NCC (0~7) and the most significant bit corresponds to NCC 7. If bit N is 0, the MS does not measure the cell level of NCC N. GUI Value Range: SELECTION0_PERM(Selection of 0 Perm.), SELECTION1_PERM(Selection of 1 Perm.), SELECTION2_PERM(Selection of 2 Perm.), SELECTION3_PERM(Selection of 3 Perm.), SELECTION4_PERM(Selection of 4 Perm.), SELECTION5_PERM(Selection of 5 Perm.), SELECTION6_PERM(Selection of 6 Perm.), SELECTION7_PERM(Selection of 7 Perm.)
PARAMETERS Actual Value Range: SELECTION0_PERM, SELECTION1_PERM, SELECTION2_PERM, SELECTION3_PERM, SELECTION4_PERM, SELECTION5_PERM, SELECTION6_PERM, SELECTION7_PERM Unit: None Default Value: None Recommended Value: SELECTION0_PERM-1&SELECTION1_PERM-1&SELECTION2_PERM1&SELECTION3_PERM-1&SELECTION4_PERM-1&SELECTION5_PERM-1&SELECTION6_PERM1&SELECTION7_PERM-1
Cell Reselection Offset
Meaning: Cell Reselect Offset (CRO), indicating a correction of the C2. Proper setting of this parameter can reduce the number of handover times, helpful for assigning an MS to a better cell. In a special case that the PT is 31, the larger the CRO value is, the lower the possibility of handing over an MS to the cell. Generally, do not set the CRO to a value larger than 25 dB. The CRO with a too large value will cause uncertain states in a network. The CRO values of the cells with different priorities in a network are almost the same. Refer to GSM Rec. 05.08 and GSM Rec. 04.08. The setting of this parameter affects only the MSs supporting the protocol of GSM Phase 2 or a later version. GUI Value Range: 0~63 Actual Value Range: 0~126, step: 2 Unit: dB Default Value: None Recommended Value: 0 Set Reselection Parameters in System Information of 2G Cell (SET GCELLRESELECTPARA) Use this command to set reselection parameters in the system information of a cell. Note 1. The reselection parameters in the system information of a cell is preset by default when the system is initialized. 2. This command can be used only in built-in PCU mode.
GPRS Cell Reselection Hysteresis
Meaning: Hysteresis value of the cell in the same routing area. When the MS in the ready state reselects a cell, if the original cell and the target cell are in the same routing area, the C2 values of the two cells at the border of the cell are quite different due to radio channel fading. As a result, the MS frequently reselects cells. Frequent cell reselection can lead to increase of signaling traffic, inefficient use of radio resources, decrease of MS data transmission rate, and thus reducing the network service quality. The cell reselection hysteresis parameter is introduced. The signal level of the adjacent cell in the same area must be greater than that of the local cell. The difference of the
PARAMETERS signal level must be greater than the value of the cell reselection hysteresis parameter. Otherwise, the MS cannot reselect a cell. The greater the GPRS cell reselection hysteresis value, the harder to start cell reselection. GUI Value Range: 0dB(0dB), 2dB(2dB), 4dB(4dB), 6dB(6dB), 8dB(8dB), 10dB(10dB), 12dB(12dB), 14dB(14dB) Actual Value Range: 0dB, 2dB, 4dB, 6dB, 8dB, 10dB, 12dB, 14dB Unit: dB Default Value: None Recommended Value: 2dB
GPRS Cell Reselection Hysteresis Applied to C31 Criterion
Meaning: Whether the reselection hysteresis parameter is applied to the C31 criterion GUI Value Range: C31NOTUSE(Not Use c31 standard), C31STANDARD(Use c31 standard) Actual Value Range: C31NOTUSE, C31STANDARD Unit: None Default Value: None Recommended Value: C31STANDARD
Exception Rule for GPRS Reselect Offset
Meaning: Whether GPRS cell reselection offset is used for C32 calculation during cell reselection. If this parameter is set to 1, then only the positive hysteresis of the neighoring cell is used in C32 calculation. GUI Value Range: 0~1 Actual Value Range: 0~1 Unit: None Default Value: None Recommended Value: 0
Allow MS to Access to Another Cell
Meaning: Whether to allow the MS to access another cell GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Cell Reselection Forbidden Time
Meaning: Forbidden time of cell reselection
PARAMETERS GUI Value Range: 5sec(5sec), 10sec(10sec), 15sec(15sec), 20sec(20sec), 60sec(60sec), 120sec(120sec), 300sec(300sec), nouse(no use) Actual Value Range: 5sec, 10sec, 15sec, 20sec, 30sec, 60sec, 120sec, 300sec, no use Unit: s Default Value: None Recommended Value: 10sec
30sec(30sec),
Accessorial Hysteresis of Cell Selection
Meaning: Hysteresis of cell selection in different routing area. When a standby or ready MS starts cell reselection, if the original cell and the target cell are in the different routing area, the signal level of the neighboring cell must be greater that of the current cell. Their difference must be larger than the specified hysteresis. Otherwise the MS cannot start cell reselection. The larger the hysteresis of GPRS cell selection, the harder to start cell reselection. GUI Value Range: 0dB(0dB), 2dB(2dB), 4dB(4dB), 6dB(6dB), 8dB(8dB), 10dB(10dB), 12dB(12dB), 14dB(14dB), nouse(no use) Actual Value Range: 0dB, 2dB, 4dB, 6dB, 8dB, 10dB, 12dB, 14dB, no use Unit: dB Default Value: None Recommended Value: 2dB Add 3G External Cell (ADD GEXT3GCELL) Use this command to add a 3G external cell. Note The name and CI of the added cell must be different from the names and CIs of the configured cells.
RNC ID
Meaning: RNC ID of a 3G external cell. The value of this parameter must be consistent with the data configuration at the RNC. GUI Value Range: 0~4095 Actual Value Range: 0~4095 Unit: None Default Value: None Recommended Value: None
Neighboring RNC Index
PARAMETERS Meaning: Internal index of a neighboring RNC. This parameter is set to 255 when the neighboring RNC that serves the 3G external neighbor is not configured. You can use the LST GNRNC command to check whether the neighboring RNC is configured. GUI Value Range: 0~6, 255 Actual Value Range: 0~6, 255 Unit: None Default Value: 255 Recommended Value: 255
DL UARFCN
Meaning: Downlink frequency of the external 3G cell GUI Value Range: 0~16383 Actual Value Range: 0~16383 Unit: None Default Value: None Recommended Value: None
Scrambling Code or Cell Parameter Id
Meaning: Scrambling code of a 3G cell. The scrambling code is used to differentiate terminals or cells. It is used after spread spectrum. Therefore, it does not change the bandwidth of signals, but only distinguishes the signals from different sources. Through scrambling, multiple transceivers can use the same codes for spread spectrum. Scrambling is used to distinguish terminals on the uplink and to distinguish cells on the downlink. GUI Value Range: 0~511 Actual Value Range: 0~511 Unit: None Default Value: None Recommended Value: 0
Diversity
Meaning: Whether to activate transmit diversity on the common channel of a 3G cell GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: Non
Utran Cell Type
PARAMETERS Meaning: This parameter specifies the type of a 3G cell. A cell type can be Frequency Division Duplex (FDD) or Time Division Duplex (TDD). GUI Value Range: FDD(FDD), TDD(TDD) Actual Value Range: FDD, TDD Unit: None Default Value: None Recommended Value: None
Sync case
Meaning: Synchronization status. This parameter is used to identify different 3G cells. This parameter should be same with the configuration of 3G cells. GUI Value Range: SyncCase1(Sync case 1), SyncCase2(Sync case 2) Actual Value Range: SyncCase1, SyncCase2 Unit: None Default Value: None Recommended Value: None
Ec/No Threshold for Layer of 3G
Meaning: Threshold for determining the layer of the 3G neighbor cell. If the Ec/No of the 3G neighbor cell is less than this threshold, the neighbor cell is set to the lowest layer (layer 5). GUI Value Range: 0~49 Actual Value Range: 0~49 Unit: dB Default Value: 30 Recommended Value: 30
Min Ec/No threshold
Meaning: Selects 3G candidate cells. If the measured value of a 3G neighboring cell is lower than this threshold, the 3G neighboring cell will be removed from among the 3G candidate cells. GUI Value Range: 0~49 Actual Value Range: 0~49 Unit: dB Default Value: 10 Recommended Value: 10
PS FDD Ec/No Quality Threshold
Meaning: Minimum Ec/No of the 3G FDD cell candidate GUI Value Range: 0~49
PARAMETERS Actual Value Range: 0~49 Unit: dB Default Value: 10 Recommended Value: 10
PS FDD RSCP Quality Threshold
Meaning: Minimum RSCP of the 3G FDD cell candidate GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: None Default Value: 10 Recommended Value: 10
PS TDD RSCP Quality Threshold
Meaning: Minimum RSCP quality threshold that the TDD 3G candidate cell must reach GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: None Default Value: 10 Recommended Value: 10
RSCP Threshold for Layer of 3G Cell
Meaning: This parameter determines the layers of 3G neighboring cells. If the measured value of a 3G neighboring cell is lower than this threshold, the 3G neighboring cell is positioned at the bottom layer, that is, layer 4. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 30 Recommended Value: 30
Min RSCP threshold
Meaning: Selects 3G candidate cells. If the measured value of a 3G neighboring cell is lower than this threshold, the 3G neighboring cell will be removed from among the 3G candidate cells. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 10
PARAMETERS Recommended Value: 10
Load Handover Support
Meaning: Indicates that if a 3G neighboring cell supports load handovers, the BSC adds the load information of the local cells in the signaling procedures related to this neighboring cell. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: NO Recommended Value: NO
Load Handover Load Accept Threshold
Meaning: If the load of a cell is lower than the value of this parameter, the cell can admit the users handed over from other cells with higher load. Otherwise, the cell rejects such users. GUI Value Range: 0~100 Actual Value Range: 0~100 Unit: per cent Default Value: 80 Recommended Value: 80 Add 2G External Cell (ADD GEXT2GCELL)
Co-MSC
Meaning: Whether the BSC that controls the external cell and the local BSC belong to the same MSC GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: NO Recommended Value: NO
Layer of the Cell
Meaning: A network basically consists of four layers, namely, Umbrella, Macro, Micro, and Pico. Cell priorities influence the sorting of neighboring cells during handovers as well as handover algorithms including PBGT and inter-layer handovers. For example, PBGT handovers can only occur among cells on a same layer and of a same priority level. If you assign different layers and priorities to a 1800-M cell and a 900-M cell, PBGT handovers from the 1800-M cell to the 900-M cell will not occur. This causes slow handovers even when the receive quality is good. GUI Value Range: 1, 2, 3, 4 Actual Value Range: 1, 2, 3, 4
PARAMETERS Unit: None Default Value: 3 Recommended Value: 3
Inter-Layer HO Threshold
Meaning: Handover threshold during the handovers between cells on different layers or of different priorities. This value is used to suppress inter-layer ping-pong handovers. Inter-layer handover threshold of the serving cell = Inter-layer HO threshold - Inter-layer HO Hysteresis; Inter-layer handover threshold of a neighboring cell = Inter-layer HO Threshold + Adjacent Cell Inter-layer HO Hysteresis - 64. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 25 Recommended Value: 25
Penalty on Fast Moving HO
Meaning: Level value of the penalty that is performed on the neighboring cells of the cell where a fast-moving MS is located. The neighboring cells must be located at the Macro, Micro, or Pico layer other than the Umbrella layer. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 30 Recommended Value: 30
Penalty Time on Fast Moving HO
Meaning: Period in which level penalty is performed on the neighboring cells of the cell where a fast-moving MS is located. The neighboring cells must be located at the Macro, Micro, or Pico layer other than the Umbrella layer. GUI Value Range: 0~255 Actual Value Range: 0~255 Unit: s Default Value: 40 Recommended Value: 40
Min DL level on candidate Cell
PARAMETERS Meaning: The M criteria supports setting minimum values for the downlink receive level of neighboring cells. The M criteria is met only when , Estimated downlink level of neighboring cells >= (Min DL level on candidate Cell + Min Access Level Offset) Estimated uplink level of neighboring cells >= (Min UL level on candidate Cell + Min Access Level Offset) GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 10
Quick Handover Punish Time
Meaning: After the fast handover is successful, the penalty on the original serving cell is performed within the Quick handover punish time: the receive level of the original serving cell is decreased by Quick handover punish value, to prevent ping-pong handovers. GUI Value Range: 0~255 Actual Value Range: 0~255 Unit: s Default Value: 10 Recommended Value: 10
Quick Handover Punish Value
Meaning: To avoid ping-pong handover, the received signal of the original serving cell is decreased by Quick handover punish value in Quick handover punish time after fast handover succeeds. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 63 Recommended Value: 63
Quick Handover Offset
Meaning: Fast handover can be triggered only when the path loss difference between the serving cell and a neighbor cell on the chain is equal to or greater than this parameter. GUI Value Range: 0~127 Actual Value Range: 0~127 Unit: dB Default Value: 68 Recommended Value: 68
PARAMETERS
NC2 Support in External Neighbor Cell
Meaning: A service support attribute of a cell, that is, whether an external GSM cell supports NC2 GUI Value Range: NO(Not support), YES(Support) Actual Value Range: NO, YES Unit: None Default Value: NO Recommended Value: NO
GPRS Support in External Neighbor Cell
Meaning: A service support attribute of a cell, that is, whether an external GSM cell supports GPRS GUI Value Range: NO(Not support), YES(Support) Actual Value Range: NO, YES Unit: None Default Value: YES Recommended Value: YES
EDGE Support in External Neighbor Cell
Meaning: A service support attribute of a cell, that is, whether an external GSM cell supports EDGE GUI Value Range: NO(Not support), YES(Support) Actual Value Range: NO, YES Unit: None Default Value: YES Recommended Value: YES
RAC
Meaning: The NS performs location management based on routing areas during GPRS packet services. Each routing area has a routing area identifier, which is broadcast as a system message. GUI Value Range: 0~255 Actual Value Range: 0~255 Unit: None Default Value: 0 Recommended Value: 0 Add 2G Neighbor Cell (ADD G2GNCELL)
Inter-cell HO Hysteresis
PARAMETERS Meaning: Reduces ping-pong handovers between cells on a same layer. This parameter is invalid when cells are on different layers. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 4 Recommended Value: In densely populated urban areas, the recommended value is 4; in the suburbs, the recommended value is 8.
Min Access Level Offset
Meaning: Minimum receive level offset. An MS can be handed over to a neighboring cell only when the downlink level of the neighboring cell is greater than the sum of Min DL level on candidate Cell and the value of this parameter. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 0 Recommended Value: 0
PBGT HO Threshold
Meaning: PBGT handovers to a neighboring cell are allowed only when the downlink level difference between the neighboring cell and the serving cell is larger than this parameter. When the value of this parameter is smaller than 64, handovers to a neighboring cell with a lower level than the current serving cell are allowed. GUI Value Range: 0~127 Actual Value Range: 0~127 Unit: dB Default Value: 68 Recommended Value: In densely populated urban areas, the recommended value is 68; in the suburbs, the recommended value is 72.
BQ HO Margin
Meaning: If (downlink level of the neighbor cell after filtering - downlink level of the serving cell (after power control compensation)) > (Inter-cell HO Hysteresis - BQ HO Margin + 64), the BQ handover to the neighbor cell is triggered. GUI Value Range: 0~127 Actual Value Range: 0~127 Unit: dB Default Value: 69 Recommended Value: 69
PARAMETERS
Chain Neighbor Cell
Meaning: Whether the cell is a chain neighboring cell. The parameter is used in the quick handover algorithm. Quick handover aims to increase the handover success rate of an MS moving at a high speed and to ensure the call continuity and low call drop rate. Quick handover applies to the scenario where an MS moves fast along an urban backbone road, a selected route, or a high-speed railroad. The target cell must be a chain neighboring cell. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: NO Recommended Value: NO
Adjacent Cell Inter-layer HO Hysteresis
Meaning: Hysteresis value during the handovers between cells on different layers or of different priorities. This value is used to suppress inter-layer ping-pong handovers. GUI Value Range: 0~127 Actual Value Range: 0~127 Unit: dB Default Value: 67 Recommended Value: 67
Directed Retry Handover Level Range
Meaning: Maximum signal level difference between the neighbor cell and the serving cell for triggering directed retry GUI Value Range: 0~128 Actual Value Range: 0~128 Unit: dB Default Value: 72 Recommended Value: 72
IBCA Neighbor Cell Flag
Meaning: Indicates whether this neighboring cell is the IBCA neighboring cell of the serving cell. That is, when a cell is configured as the neighboring cell of the serving cell, whether the IBCA algorithm considers the interference between the serving cell and the neighboring cell. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: NO Recommended Value: NO
PARAMETERS
IBCA Dyn Measure Neighbor Cell Flag
Meaning: Whether to measure the IBCA neighbor cells of the serving cell dynamically. If the dynamic measurement is enabled, when a call uses a channel, the BSC sends the SACCH Modify message to modify the frequencies in the BA2 table in System Information 5, 5bis, and 5ter to the frequencies at which the IBCA neighbor cells operate. Thus, the call measures and reports only these frequencies to the BSC. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: NO Recommended Value: Set this parameter to YES for the neighboring cell with co-channel interference and the neighboring cell that may cause interference; set this parameter to NO for other neighboring cells.
IBCA RxLev Offset
Meaning: Estimates the receive level of the unmeasured IBCA neighboring cells. When a consecutive IBCA Non Measurement Ncell Stat. Num measurement reports cover less than six neighboring cells (or the number of the reported neighboring cells is smaller than that of the actually configured neighboring cells), this parameter is used to estimate the receive level of the unmeasured IBCA neighboring cells. The estimated value is IBCA Pathloss Est of Non. MR Ncell. Otherwise, the signal strength of the unmeasured IBCA neighboring cells is the signal strength of the measured neighboring cells (including non-IBCA neighboring cells) subtracted by IBCA RxLev Offset. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 4 Recommended Value: 4
Chain Neighbor Cell Type
Meaning: This parameter indicates the geographical relationship between the neighboring cell and the serving cell. In the BSC, if direction A is selected, then the reverse direction is B. GUI Value Range: QUICK_HO_NCELL_TYPE_A(QUICK_HO_NCELL_TYPE_A), QUICK_HO_NCELL_TYPE_B(QUICK_HO_NCELL_TYPE_B) Actual Value Range: QUICK_HO_NCELL_TYPE_A, QUICK_HO_NCELL_TYPE_B Unit: None Default Value: QUICK_HO_NCELL_TYPE_A Recommended Value: QUICK_HO_NCELL_TYPE_A
Edge HO AdjCell Watch Time
PARAMETERS Meaning: According to the P/N rule, if a neighbor cell meets the conditions for selecting the neighbor cell for edge handover in P of N measurement reports, the edge handover to the neighbor cell is triggered. This parameter specifies the number N. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 6 Recommended Value: 6
Edge AdjCell Valid Time
Meaning: According to the P/N rule, if a neighbor cell meets the conditions for selecting the neighbor cell for edge handover in P of N measurement reports, the edge handover to the neighbor cell is triggered. This parameter specifies the number P. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 4 Recommended Value: 4
Layer HO Watch Time
Meaning: The triggering of inter-layer handovers must meet the P/N criteria, that is, when the condition for inter-layer handovers is met for a consecutive P seconds during N seconds, an interlayer handover is triggered. This parameter corresponds to the N in the P/N criteria. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 6 Recommended Value: 6
Layer HO Valid Time
Meaning: The triggering of inter-layer handovers must meet the P/N criteria, that is, when the condition for inter-layer handovers is met for a consecutive P seconds during N seconds, an interlayer handover is triggered. This parameter corresponds to the P in the P/N criteria. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 4 Recommended Value: 4
PARAMETERS
PBGT Watch Time
Meaning: The triggering of PBGT handovers must meet the P/N criteria, that is, when the condition for PBGT handovers is met for a consecutive P seconds during N seconds, a PBGT handover is triggered. This parameter corresponds to the N in the P/N criteria. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 6 Recommended Value: 6
PBGT Valid Time
Meaning: The triggering of PBGT handovers must meet the P/N criteria, that is, when the condition for PBGT handovers is met for a consecutive P seconds during N seconds, a PBGT handover is triggered. This parameter corresponds to the P in the P/N criteria. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 4 Recommended Value: 4
Better Cell HO Watch Time
Meaning: According to the P/N rule, if the conditions for the handover to a better cell due to interference are met for P seconds within N seconds, the handover is triggered. This parameter specifies the number N. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 6 Recommended Value: 6
Better Cell HO Valid Time
Meaning: According to the P/N rule, if the conditions for the handover to a better cell due to interference are met for P seconds within N seconds, the handover is triggered. This parameter specifies the number P. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 4 Recommended Value: 4
PARAMETERS
Quick Handover Static Time
Meaning: According to the P/N rule, if the conditions for fast handover are met in P of N measurement reports, the handover is triggered. This parameter specifies the number N. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 4 Recommended Value: 4
Quick Handover Last Time
Meaning: According to the P/N rule, if the conditions for fast handover are met in P of N measurement reports, the handover is triggered. This parameter specifies the number P. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 3 Recommended Value: 3
HCS HO Watch Time
Meaning: According to the P/N rule, if the conditions for the handover to a different micro cell due to fast movement are met in P of N measurement reports, the handover is triggered. This parameter specifies the number N. GUI Value Range: 1~16 Actual Value Range: 0.5~8, step:0.5 Unit: s Default Value: 3 Recommended Value: 3
HCS HO Valid Time
Meaning: According to the P/N rule, if the conditions for the handover to a different micro cell due to fast movement are met in P of N measurement reports, the handover is triggered. This parameter specifies the number P. GUI Value Range: 1~16 Actual Value Range: 0.5~8, step:0.5 Unit: s Default Value: 2 Recommended Value: 2
PARAMETERS
BQ HO Watch Time
Meaning: According to the P/N rule, if the conditions for emergency BQ handover are met in P of N measurement reports, the handover is triggered. This parameter specifies the number N. GUI Value Range: 1~16 Actual Value Range: 0.5~8, step:0.5 Unit: s Default Value: 1 Recommended Value: 1
BQ HO Valid Time
Meaning: According to the P/N rule, if the conditions for emergency BQ handover are met in P of N measurement reports, the handover is triggered. This parameter specifies the number P. GUI Value Range: 1~16 Actual Value Range: 0.5~8, step:0.5 Unit: s Default Value: 1 Recommended Value: 1
TA HO Watch Time
Meaning: The P/N criterion must be met for triggering a TA handover. That is, the TA handover can be triggered only if P measurement reports among N measurement reports meet the triggering conditions. This parameter corresponds to N in the P/N criterion. GUI Value Range: 1~16 Actual Value Range: 0.5~0.8, step:0.5 Unit: s Default Value: 1 Recommended Value: 1
TA HO Valid Time
Meaning: The P/N criterion must be met for triggering a TA handover. That is, the TA handover can be triggered only if P measurement reports among N measurement reports meet the triggering conditions. This parameter corresponds to P in the P/N criterion. GUI Value Range: 1~16 Actual Value Range: 0.5~8, step:0.5 Unit: s Default Value: 1 Recommended Value: 1
PARAMETERS
UL BQ HO Static Time
Meaning: The P/N criterion must be met for triggering a UL BQ handover. That is, the UL BQ handover can be triggered only if P measurement reports among N measurement reports meet the triggering conditions. This parameter corresponds to N in the P/N criterion. GUI Value Range: 1~8 Actual Value Range: 0.5~4, step:0.5 Unit: s Default Value: 1 Recommended Value: 1
UL BQ HO Last Time
Meaning: The P/N criterion must be met for triggering a UL BQ handover. That is, the UL BQ handover can be triggered only if P measurement reports among N measurement reports meet the triggering conditions. This parameter corresponds to P in the P/N criterion. GUI Value Range: 1~8 Actual Value Range: 0.5~4, step:0.5 Unit: s Default Value: 1 Recommended Value: 1 Add 3G Neighbor Cell (ADD G3GNCELL) Use this command to add a 3G neighboring cell. The source cell is a 2G internal cell and the neighboring cell is a 3G external cell.
RSCP Offset
Meaning: This parameter adjusts Min RSCP threshold to enable the selection of 3G candidate cells based on cell priorities GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: 3 Recommended Value: 3
Ec/No Offset
Meaning: As a performance counter for 3G cells, Ec/No indicates the ratio of the energy per received chip to the spectral noise power density. If the Ec/No of a 3G neighbor cell is greater than HOECNOTH3G plus this parameter, the neighbor cell is listed in the candidate cell queue.
PARAMETERS GUI Value Range: 0~49 Actual Value Range: 0~49 Unit: dB Default Value: 3 Recommended Value: 3
TDD 3G Better Cell HO Watch Time
Meaning: According to the P/N rule, if the conditions for the handover to a better 3G cell are met in P of N measurement reports, the handover is triggered. This parameter specifies the number N. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 10 Recommended Value: 10
TDD 3G Better Cell HO Valid Time
Meaning: According to the P/N rule, if the conditions for the handover to a better 3G cell are met for P seconds within N seconds, the handover is triggered. This parameter specifies the number P. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 8 Recommended Value: 8
FDD 3G Better Cell HO Watch Time
Meaning: According to the P/N rule, if the conditions for the handover to a better 3G cell are met in P of N measurement reports, the handover is triggered. This parameter specifies the number N. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 10 Recommended Value: 10
FDD 3G Better Cell HO Valid Time
Meaning: According to the P/N rule, if the conditions for the handover to a better 3G cell are met for P seconds within N seconds, the handover is triggered.
PARAMETERS This parameter specifies the number P. GUI Value Range: 1~32 Actual Value Range: 0.5~16, step:0.5 Unit: s Default Value: 8 Recommended Value: 8 Set GPRS Channel Management Parameters of 2G Cell (SET GCELLPSCHM) Use this command to set GPRS channel management parameters of a cell.
Maximum Rate Threshold of PDCHs in a Cell
Meaning: Maximum value of the PDCH ratio in a cell. The number of available TCHs and PDCHs in a cell is set to a fixed value. The PDCH ratio is: Number of available PDCHs/(Number of available TCHFs + Number of available static PDCHs). This parameter is used to restrict the PDCH ratio. GUI Value Range: 0~100 Actual Value Range: 0~100 Unit: per cent Default Value: None Recommended Value: 30
Uplink Multiplex Threshold of Dynamic Channel Conversation
Meaning: Uplink multiplex threshold of dynamic channel conversion. When the subscriber number on the channel reaches the value (threshold/10), the dynamic channel conversion application is triggered. We recommand that the value of "Uplink Multiplex Threshold of Dynamic Channel Conversion" should be less than "PDCH Uplink Multiplex Threshold" for triggering converting dynamic channel in time and reducing PDCH multiplex. GUI Value Range: 10~70 Actual Value Range: 10~70 Unit: None Default Value: None Recommended Value: 20
Downlink Multiplex Threshold of Dynamic Channel Conversation
Meaning: Downlink multiplex threshold of dynamic channel conversion. When the subscriber number on the channel reaches the value (threshold/10), the dynamic channel conversion is triggered. We recommand that the value of "Downlink Multiplex Threshold of Dynamic Channel
PARAMETERS Conversion" should be less than "PDCH Downlink Multiplex Threshold" for triggering converting dynamic channel in time and reducing PDCH multiplex. GUI Value Range: 10~80 Actual Value Range: 10~80 Unit: None Default Value: None Recommended Value: 20
PDCH Uplink Multiplex Threshold
Meaning: PDCH downlink multiplex threshold, Indicating the maximum TBFs on the downlink PDCH (parameter value/10).We recommand that the value of "Downlink Multiplex Threshold of Dynamic Channel Conversion" should be less than "PDCH Downlink Multiplex Threshold" for triggering converting dynamic channel in time and reducing PDCH multiplex. GUI Value Range: 10~160 Actual Value Range: 10~160 Unit: None Default Value: None Recommended Value: 80
Dynamic Channel Conversation Parameter of Concentric Cell
Meaning: Conversion policy of the dynamic channel of the concentric cell GUI Value Range: CONVERT0(Only convert at UL), CONVERT1(Only convert at OL), CONVERT2(UL first and convert allowed), CONVERT3(OL first and convert allowed) Actual Value Range: CONVERT0, CONVERT1, CONVERT2, CONVERT3 Unit: None Default Value: None Recommended Value: CONVERT0
Timer Releasing Idle Dynamic Channel
Meaning: Time to wait for releasing the dynamic channel after the TBF on the dynamic channel is released. When all the TBFs on the channel are released, the dynamic channel is not released at once. Instead, the timer is started when the channels are idle. Before the timer expires, if new service request is received, the dynamic channel is still occupied and timer is stopped; otherwise, the dynamic channel is released after the timer expired. GUI Value Range: 10~3600 Actual Value Range: 10~3600 Unit: s Default Value: None Recommended Value: 20
PARAMETERS Set Call Control UTRAN System Message Parameters of Cell (SET GCELLCCUTRANSYS) Use this command to set call control UTRAN system message parameters of a cell.
Qsearch I
Meaning: This parameter specifies the level threshold for cell reselection in idle mode. In idle mode, if the signal level of the serving cell is below [0, 7] or above [8, 15], the MS starts to search for 3G cells. For example, if this parameter is set to 5 and if the signal level of the serving cell is lower than 5, the MS starts to search for 3G cells; if this parameter is set to 10 and if the signal level of the serving cell is above 10, then the MS starts to search for 3G cells. The values of this parameter correspond to the following decibel values: 0: -98 dBm 1: -94 dBm 2: -90 dBm 3: -86 dBm 4: -82 dBm 5: -78 dBm 6: -74 dBm 7: (always), that is, the MS keeps searching for 3G cells 8: -78 dBm 9: -74 dBm 10: -70 dBm 11: -66 dBm 12: -62 dBm 13: -58 dBm 14: -54 dBm 15: Positive infinity(never), that is, the MS does not search for 3G cells GUI Value Range: 0~15 Actual Value Range: -98, -94, -90, -86, -82, -78, -74, (always), -78, -74, -70, -66, -62, -58, -54, Positive infinity(never) Unit: None Default Value: None Recommended Value: 15
FDD Q Offset
Meaning: This parameter specifies one of the thresholds of the signal level for 3G cell reselection. A FDD cell becomes a candidate cell if all the following conditions are met for five consecutive seconds: 1.Receive level of the FDD cell > Average receive level of the current serving cell + FDD Q offset; The FDD cell meets the following condition in the case of any neighboring 2G cell: Receive level of the FDD cell > Receive level of any neighboring 2G cell + FDD Q offset; 2. Ec/No of the FDD cell > FDD Qmin - FDD Qmin Offset; 3. Receive level of the FDD cell > "RSCP Threshold"; If multiple FDD cells meet the preceding conditions, the MS reselects the cell with the strongest receive level. See 3GPP TSs 45.008 and 25.304. The values of this parameter correspond to the following decibel values: 0: - (always select a cell if acceptable) 1: -28 dB, 2: -24 dB, ... 15: 28 dB. GUI Value Range: 0~15
PARAMETERS Actual Value Range: Negative infinity, -28~28, step: 4 Unit: dB Default Value: None Recommended Value: 8
FDD RSCP Min.
Meaning: Minimum level threshold of UTRAN cell reselection. During the cell reselection decision from a GSM cell to a FDD cell, this parameter is used to calculate the RSCP threshold of the target cell. A FDD cell becomes a candidate cell if all the following conditions are met for five consecutive seconds: 1.Receive level of the FDD cell > Average receive level of the current serving cell + FDD Q offset; The FDD cell meets the following condition in the case of any neighboring 2G cell: Receive level of the FDD cell > Receive level of any neighboring 2G cell + FDD Q offset; 2. Ec/No of the FDD cell > FDD Qmin ¨C FDD Qmin Offset; 3. Receive level of the FDD cell > "RSCP Threshold"; If multiple FDD cells meet the preceding conditions, the MS reselects the cell with the strongest receive level. See 3GPP TSs 45.008 and 25.304. The values of this parameter correspond to the following decibel values: 0 = -114 dBm, 1 = -112 dBm, 2 = -110 dBm, ... 14 = -86 dBm, 15 = -84 dBm. GUI Value Range: 0~15 Actual Value Range: -114~-84, step: 2 Unit: dBm Default Value: None Recommended Value: 6
Qsearch P
Meaning: This parameter specifies one threshold of the signal level for cell reselection in packet transfer mode. In packet transfer mode, if the signal level of the serving cell is below [0, 7] or above [8, 15], the MS starts to search for 3G cells. For example, if this parameter is set to 5 and if the signal level of the serving cell is lower than 5, the MS starts to search for 3G cells; if this parameter is set to 10 and if the signal level of the serving cell is above 10, then the MS starts to search for 3G cells. The values of this parameter correspond to the following decibel values: 0: -98 dBm 1: -94 dBm ... 6: -74 dBm 7: (always) 8: -78 dBm 9: -74 dBm ... 14: -54 dBm GUI Value Range: 0~15 Actual Value Range: -98, -94, -90, -86, -82, -78, -74, (always), -78, -74, -70, -66, -62, -58, -54, Positive infinity(never)
PARAMETERS Unit: None Default Value: None Recommended Value: 15
Qsearch C
Meaning: In connection mode, if the signal level is below [0-7] or above [8-15], the MS starts to search for 3G cells. For example, if this parameter is set to 5 and if the signal level of the serving cell is lower than 5, the MS starts to search for 3G cells; if this parameter is set to 10 and if the signal level of the serving cell is above 10, then the MS starts to search for 3G cells. 0: -98 dBm 1: -94 dBm ... 6: -74 dBm 7: (always) 8: -78 dBm 9: -74 dBm ... 14: -54 dBm 15: Positive infinity (never) GUI Value Range: 0~15 Actual Value Range: -98, -94, -90, -86, -82, -78, -74, (always), -78, -74, -70, -66, -62, -58, -54, Positive infinity(never) Unit: None Default Value: None Recommended Value: 15 Set Basic Handover Parameters of Cell (SET GCELLHOBASIC) Use this command to set the basic handover control parameters of a cell.
Co-BSC/MSC Adj
Meaning: Whether to adjust the candidate cell queue to give priority to intra-BSC/MSC handover GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
PARAMETERS
Intracell HO Allowed
Meaning: This parameter specifies whether the intra-cell handover is enabled. Note: A forced intracell handover is not subject to this parameter. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: In the hot-spot areas, densely populated urban areas, urban areas, suburbs, and rural areas, the recommended value is YES; in the high-speed circumstances, the recommended value is NO.
Intracell F-H HO Allowed
Meaning: Whether to allow AMR handovers. This parameter has no impact on dynamic non-AMR FH handovers. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Load Handover Support
Meaning: This parameter specifies whether a traffic load-sharing handover is enabled. The load handover helps to reduce cell congestion, improve success rate of channel assignment, and balance the traffic load among cells, thus improving the network performance. The load handover is used as an emergency measure instead of a primary measure to adjust abnormal traffic burst in partial areas. If load handovers occur frequently in a partial area, the cell and TRX configuration of BTSs and the network layout should be adjusted. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: NO
MS Fast Moving HO Allowed
Meaning: Whether to enable the fast moving micro-cell handover algorithm. The fast moving microcell handover algorithm enables fast moving MSs to switch over to macro-cells, thus reducing the handover times. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None
PARAMETERS Default Value: None Recommended Value: Set this parameter to YES only in special scenarios such as highways.
PBGT HO Allowed
Meaning: Whether to use the PBGT handover algorithm. PBGT handovers are based on path loss. The PBGT handover algorithm searches in real time for cells that have lower path loss and meet certain system requirements, and decides whether to perform the handovers. To avoid ping-pong handovers, PBGT handovers can occur only on TCHs and among cells on a same layer and a same priority level. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Level HO Allowed
Meaning: Whether to allow inter-layer and inter-level handovers. The inter-layer and inter-level handover algorithm is achieved through the setting of different layers and priorities for cells, which switches traffic to cells of a higher precedence (decided by Layer of the cell and Cell priority together). GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Edge HO Allowed
Meaning: Whether to enable the edge handover algorithm. When an MS makes a call at the edge of a cell, the call may drop if the received signal level is too low. To avoid such a call drop, the edge handover algorithm is involved. When the uplink signal level of the serving cell is less than Edge HO UL RX_LEV Threshold or the downlink signal level of the serving cell is less than Edge HO DL RX_LEV Threshold, the edge handover is triggered. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
PARAMETERS
BQ HO Allowed
Meaning: Whether to enable the bad quality (BQ) handover algorithm. Whether to trigger BQ handover depends on the uplink and downlink transmit quality (measured by using BER). If the uplink or downlink BQ exceeds the BQ handover threshold, emergency BQ handover is triggered. The possible causes of BER increase (or quality degradation) include too low signal power and channel interference. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
TA HO Allowed
Meaning: Whether to enable the time advance (TA) handover. The TA handover determines whether the timing advance (TA) is higher than the predefined TA threshold. When the TA is higher than the predefined TA threshold, a TA handover is triggered. The TA is calculated based on the distance between the MS and the BTS. The longer the distance is, the greater the TA value is. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
Interference HO Allowed
Meaning: Whether to allow the interference handover algorithm. Interference handovers are triggered when the receive level is higher than the receive threshold while the transmit quality is lower than the interference handover quality threshold, that is, when the MSs are subject to all kinds of radio interferences. GUI Value Range: NO(No), YES(Yes) Actual Value Range: NO, YES Unit: None Default Value: None Recommended Value: YES
F2H HO Threshold
Meaning: For an AMR call, if the currently occupied channel is a full rate channel and the Radio Quality Indication (RQI) is always higher than the threshold set by this parameter, an intra-cell F-H handover is triggered. GUI Value Range: 0~39 Actual Value Range: 0~39
PARAMETERS Unit: None Default Value: None Recommended Value: 25
H2F HO Threshold
Meaning: For an AMR call, if the currently occupied channel is a half rate channel and the Radio Quality Indication (RQI) is always lower than the threshold set by this parameter, an intra-cell H-F handover is triggered. GUI Value Range: 0~39 Actual Value Range: 0~39 Unit: None Default Value: None Recommended Value: 12
Inter-layer HO Hysteresis
Meaning: Hysteresis value during the handovers between cells on different layers or of different priorities. This value is used to suppress inter-layer ping-pong handovers. Inter-layer handover threshold of the serving cell = Inter-layer HO threshold - Inter-layer HO Hysteresis; Inter-layer handover threshold of a neighboring cell = Inter-layer HO threshold + Adjacent Cell Inter-layer HO Hysteresis - 64. GUI Value Range: 0~63 Actual Value Range: 0~63 Unit: dB Default Value: None Recommended Value: 2 Set Handover Control Parameters of Cell (SET GCELLHOCTRL)
MR.Preprocessing
Meaning: Whether to enable the BTS to preprocess measurement reports. This parameter determines where to conduct power control. GUI Value Range: BSC_Preprocessing(BSC preprocessing), BTS_Preprocessing(BTS preprocessing) Actual Value Range: BSC_Preprocessing, BTS_Preprocessing Unit: None Default Value: None Recommended Value: BTS_Preprocessing
