HANDOVERMin interval for TCH HOsMin interval for SD HOsMin interval for consecutive HOsMin interval for Emerg. HOsCo-BSC/MSC AdjPenalty allowedMS fast moving HO allowedRx_Level_Drop HO allowedMS power prediction after HOMR. Pre-processTransfer original MR.Transfer BS/MS power classCell Asynchronism HOSent Freq. of preprocessed MR.Multi-MNC HO allowedMulti-MNC HO typeEDGE HO AllowedEDGE HO min time (s)DirectRtryRxLevInter-layer HO Thrsh.Inter-layer HO hysteresisPenalty on fast moving HOPenalty time on fast moving HOUL expected level at HO accessMSC shared or notMin access level offsetAllowed MR number lostAllowed MR number lostFilter length for TCH levelFilter length for TCH Qual.Filter length for SD levelFilter length for SD QualFilter length for Ncell RX_LEVFilter length for TAPenalty level after HO fail.Penalty time after HO failPenalty level after BQ HO Fail.Penalty time after BQ HO Fail.Penalty time after TA HO FailPenalty time after TA HO Fail.OL-to-UL HO Failure Penalty Time(s)UL-to-OL HO Failure Penalty Time(s)UL-to-OL HO Failure Retry numberFilter parameters A1A8Filter parameter BMIN TASystem flux Thrsh. for load HOLoad HO Thrsh.Load Req. on candidate cellLoad HO bandwidthLoad HO step periodLoad HO step levelEdge HO watch timeEdge HO valid timePBGT watch timePBGT valid timeIntracell TCHF-TCHH handover statistics timeIntracell TCHF-TCHH handover lasting timeHandover threshold from TCHF to TCHHHandover threshold from TCHH to TCHFLayer HO watch timeLayer HO valid timeMS Fast-moving Watch cellsMS Fast-moving Valid cellsMAX consecutive HO timesForbidden time after MAX timesInterval for consecutive HO Jud.Direction for Concentric Cell HO UL to OL HO AllowedDirection for Concentric Cell HO OL to UL HO AllowedCriterion for Concentric Cell HO Rx_Lev for Concentric Cell HO AllowedCriterion for Concentric Cell HO Rx_Qual for Concentric Cell HO AllowedCriterion for Concentric Cell HO TA Concentric Cell HO AllowedConcentric Cell signal intensity differenceRX-LEV Thrsh.RX-LEV HysteresisReceiving Quality Thrsh.TA Thrsh.TA hysteresisConcentric Cell HO watch timeConcentric Cell HO valid timeAssign optimum layerAssign-Optimum-Level Thrsh.Assign-Optimum-TA ThrshTA pref. Of Imme-Assign AllowedTA Thrsh. Of Imme- Assign pref.Pref. subcell in HO of intra-BSCIncoming-to-BSC HO optimum layerEnhanced Concentric Cell allowedUL to OL Traffic HO AllowedTraffic Thrsh. of underlaidUnderlaid HO Step periodUnderlaid HO Step levelPenalty Time of UL to OL HO (s)Range: 160Range: 160Range: 160Range: 160Range: Yes, NoRange: Yes, NoRange: Yes, NoRange: Yes, NoRange: Yes, NoRange: Yes, NoRange: Yes, NoRange: Yes, NoRange: Yes, NoRange: Do not report, Twice every second, Once every second, Once every 2 seconds, Once every 4 secondsRange: Yes/NoRange: Normal handover, only the handover to a cell of the same MNC allowed, a cell of the same MNC first, a better cell of the same MNC first, a better cell of a different MNC first, a cell of a different MNC first, and only the handover to a cell of a dRange: Yes, noRange: 360Range: 063Range: 063. (-110 dBm-47 dBm)Range: 063Range: 063Range: 0255Range: 063. (-110 dBm-47 dBm)Range: Yes, No.Range: 063Range: 032Range: 032Range: 132Range: 132Range: 132Range: 132Range: 132Range: 132Range: 063Range: 060Range: 063Range: 060Range: 063Range: 060Range: 0255Range: 10255Range: 08Range: 020Range: 0255Range: 063Range: 0, 811; its corresponding percentage values: 0, 70, 80, 90, 95Range: 07. Its corresponding percentage values: 0, 50, 60, 70, 75, 80, 85, 90Range: 07. Its corresponding percentage values: 0, 50, 60, 70, 75, 80, 85. 90Range: 063Range: 160Range: 160Range: 116Range: 116Range: 116Range: 1 16Range: 1 16Range: 1 16Range: 0 39Range: 0 39Range: 1 16Range: 0 16Range: 1 10Range: 1 10Range: 120Range: 1200Range: 1200Range: Yes/NoRange: Yes/NoRange: Yes/NoRange: Yes/NoRange: Yes/NoRange: 063Range: 063. (-110 dBm-47 dBm)Range: 063Range: 070Range: 0~255Range: 063Range: 016Range: 016Range: System optimization, UnderLaid subcell, OverLaid subcell, No preferenceRange: 063,(-110 dBm-47 dBm)Range: 0255Range: Yes (1), No (0)Range: 0255Range: System Optimization, OverLaid Subcell, UnderLaid Subcell, No PreferenceRange: UnderLaid subcell, OverLaid subcell, No preferenceRange: Yes (1), No (0)Range: Yes (1), No (0)Range: 0100Range: 1255Range: 163Range: 0 255Unit SecondUnit SecondUnit SecondUnit SecondUnit -Unit -Unit -Unit -Unit -Unit -Unit -Unit -Unit NoneUnit -Unit -Unit -Unit: -Unit: sUnit: Level gradeUnit dBUnit dBUnit dBUnit SecondUnit GradeUnit:Unit dBUnit Number of MRsUnit Number of MRsUnit -Unit -Unit -Unit -Unit -Unit -Unit dBUnit SecondUnit dBUnit SecondUnit dBUnit SecondUnit SecondUnit SecondUnitUnit -Unit -Unit Bit periodUnit Flow gradeUnit Load gradeUnit Load gradeUnit dBUnit SecondUnit dBUnit: SecondUnit: SecondUnit: SecondUnit: SecondUnit: secondUnit: secondUnit -Unit -Unit SecondUnit SecondUnit -Unit -Unit -Unit SecondUnit SecondUnit -Unit -Unit -Unit -Unit -Unit dBUnit GradeUnit dBUnit -Unit Bit period. 1 bit period corresponds to 0.55 kmUnit bit period, 1 bit period corresponding to 0.55 kmUnit SecondUnit SecondUnit -Unit dBmUnitUnit -Unit -Unit -Unit -Unit -Unit -Unit -Unit SecondUnit -Unit SecondDefault: 2Default: 2Default: 4Default: 4Default: NoDefault: YesDefault: NoDefault: NoDefault: NoDefault: NoDefault: NoDefault: YesDefault: NoDefault: Twice every secondDefault: NDefault: Normal handoverDefault: NoDefault: 3Default: 16Default: 25Default: 3Default: 30Default: 40Default: 35Default: set based on actual situationDefault: 0Default: 4Default: 4Default: 4Default: 4Default: 2Default: 2Default: 4Default: 4Default: 30Default: 10Default: 63Default: 15Default: 63Default: 10Default: 10Default: 40Default: 3Default: 10Default: 0Default: 0Default: 10Default: 6Default: 5Default: 25Default: 10Default: 5Default: 3Default: 2Default: 3Default: 2Default: 3Default: 2Default: 30Default: 10Default: 5Default: 4Default: 3Default: 2Default: 3Default: 20Default: 6Default: YesDefault: YesDefault: YesDefault: YesDefault: YesDefault: 5,Default: 35Default: 5Default: 60Default: 63 (TA threshold is not used to distinguish the boundary betweenDefault: 0Default: 5Default: 4Default: When "Cell system type" is set as "GSM900/DCS1800", the default isDefault: 35Default: 63Default: No (0)Default: 60 for double timeslots extended cellDefault: System OptimizationDefault: UnderLaid subcellDefault: Yes (0)Default: Yes (0)Default: 80Default: 5Default: 5Default: 10Description: When a new TCH is assigned, a timer should be started. Only whenDescription: When a new SDCCH is assigned, a timer should be started. OnlyDescription: This parameter is used to prevent consecutive handovers that canDescription: When BSC completes or fails to perform an emergency handover, itDescription: Indicates whether to adjust a candidate cell sorting so that handoverDescription: Indicates whether penalty is given to certain candidate cells,Description: The fast moving algorithm is a special algorithm to process fastDescription: The parameter decides whether to use the emergency handoverDescription: Indicates whether MS is allowed to use optimized power instead ofDescription: Indicates whether BTS pre-processes MR. If this parameter is set toDescription: Description: Indicates whether to transfer the original MR to BSCDescription: Indicates whether to transfer the original BS/MS power class toDescription: The synchronous handover between synchronous cells in a BTS toDescription: Indicates the period of BTS to transfer preprocessed MR to BSC.Description: Controlling whether the multi-MNC handover decision is allowed. IfDescription: When "Multi-MNC HO allowed" is set as "Y", you can determine theDescription Used to determine whether use the EDGE HO algorithm or notDescription Used to determine the minimum handover time after EDGE serviceDescription This parameter defines the direct retry level threshold. It is used toDescription: The threshold for inter-layer Hierarchical Handover. This thresholdDescription: Indicates the hysteresis for inter-layer or inter-priority handover. It isDescription: When MS is moving fast in Umbrella layer, the penalty will be givenDescription: The duration of penalty given to the neighboring cells when MS is inDescription: Indicates the expected uplink receiving level on a target channelDescription: Whether the external cell shares MSC with the current BSC.Description: This offset is based on the "Min DL level on Candidate Cell". ForDescription: Indicates the number of MRs allowed losing during interpolationDescription: Indicates the number of MRs allowed losing during interpolationDescription: Indicates the number of MRs to be used to do TCH signal strengthDescription: Indicates the number of MRs to be used to do TCH signal qualityDescription: Indicates the number of MRs to be used to do SDCCH signalDescription: Indicates the number of MRs to be used to do SDCCH signal qualityDescription: Indicates the number of MRs to be used to do neighboring cellsDescription: Indicates the number of MRs to be used to do TA averagingDescription: After the handover fails due to target cell congestion and otherDescription: See the description of Penalty level after HO fail. This parameterDescription: When the emergency handover to a cell and the emergencyDescription: See the description of Penalty level after BQ HO Fail.. ThisDescription: When the emergency handover due to too great TA value in a cellDescription: See the description of Penalty level after TA HO Fail.. ThisDescription: Once an overlaid-to-underlaid subcell handover fails, the callDescription: Once an underlaid-to-overlaid subcell handover fails, the systemDescription: Upon UL-to-OL subcell handover decision, the system decidesDescription: Parameters for level fast drop filter, totally 9 parameters, includingDescription: Used for the fast drop filter.Description: In a single timeslot extended cell, MS can hand over from underlaidDescription: The load handover occurs only when the system load is lower than aDescription: The recommended value of Load HO Thrsh. is 7.Description: The recommended value of Load Req. on candidate cell is 5.Description: This parameter works together with other parameters to determineDescription: When a cell is qualified for handover, handover requests might beDescription: This parameter indicates the interval between two different handoverDescription: The uplink and downlink receiving levels are measured within EdgeDescription: To trigger an edge handover, the receiving level of the uplink orDescription: The path losses of adjacent cells and the serving cell are comparedDescription: The PBGT handover will be triggered when the path loss of adjacentDescription: According to the P/N rule, system judges whether to implement theDescription: Within the intracell TCHF-TCHH handover statistics time, the lastingDescription: Within a specified time, if the C/I of the TCHH is higher than theDescription: Within a specified time, if the C/I of the TCHH is lower than theDescription: See the description of PBGT watch time. This parameter is used forDescription: See the description of PBGT valid time. This parameter is used forDescription: The number of cells used to judge whether MS is in fast movingDescription: This parameter works together with MS Fast-moving Watch cells.Description: If the interval of two continuous intra-cell handovers is less thanDescription: See the description of MAX consecutive HO times.Description: See the description of MAX consecutive HO times.Description: Used to determine whether the handover is performed fromDescription: Used to determine whether the handover is performed from OverLaidDescription: Used to determine whether the receiving level of downlink is taken asDescription: Used to determine whether the receiving quality of downlink is takenDescription: Used to determine whether TA is taken as the judgment condition inDescription: Used to compensate the intensity difference between OverLaidDescription: When the "Enhanced Concentric Cell Allowed" is set as "No",Description: When the "Enhanced Concentric Cell Allowed" is set as "No",Description: When the "Enhanced Concentric Cell Allowed" is set as "No", One ofOverLaid subcell and UnderLaid subcell)Description: When the "Enhanced Concentric Cell Allowed" is set as "No", TADescription: See the description of PBGT watch time. This parameter is used forDescription: See the description of PBGT valid time. This parameter is used forUnderlaid subcell; When "Cell system type" is not set asDescription: After selection of optimal layer, the current SDCCH level can beDescription: After selection of optimal layer, the current SDCCH level can beDescription: It determinates whether the system allocates channel according to0 for othersDescription: The incoming HO intra-BSC optimum algorithm allowed. When aDescription: Generally, the inter-BSC handover is triggered at the edge of a cell.Description: It determinates whether the cell support enhanced IUO.Description: It determines whether the traffic in underlaid subcell is one ofDescription: If "UL to OL Traffic HO Allowed" is set as "Yes", and the traffic inDescription: If there are some handover requests from underlaid subcell toDescription: In the grade by grade handover from underlaid to overlaid, theDescription: If "Penalty allowed" is set to "Yes" in the [Handover control table],this timer times out will handover be allowed. This parameter is thewhen this timer times out will handover be allowed. This parameterresult in bad network performance. After BSC sends a handoverwill start a timer. BSC will not perform any emergency handoverin the same BSC/MSC is in priority.including the target cell that has handover failure history and the cellmoving MS. This parameter is used to decide whether to use thisalgorithm when receiving level drops fast.the maximum power to access new channel during handover. If thisNo, it means that MR is processed by BSC. In this case, theafter BTS pre-processes MR. When the parameter is set to "Yes",BSC. If the parameter is set to "No", BTS will not report BS/MSwhich a fiber repeater is attached is easy to fail due to different TAsNote: In the case of 15:1 function, it is recommended to set this parameterN is selected, the multi-MNC handover decision will not bemulti-MNC handover control strategy according to this parameter.beginsfilter the target cells for the direct retry.should satisfy the following requirement: Inter-layer HO Thrsh. used to avoid inter-layer Ping-Pong handover. Actual Inter-layer HOto other neighboring cells in other layers. This parameter determinesfast moving state.when MS hands over. The value of this parameter should beNote: 1. In the external cell description table, the cell number ranges from 0 to 799.different neighboring cells, different offsets can be defined. Onlyprocessing. If the number of MRs lost continuously is less than thisprocessing. If the number of MRs lost continuously is less than thisaveraging calculation. When the filtering window is set to be tooaveraging calculation. When the filtering window is set to be toostrength averaging calculation. The SDCCH occupation time byaveraging calculation. The SDCCH occupation time by MS is shortersignal strength averaging calculation. When the filter window is setcalculationreasons (i.e. internal handover refuse message is received; or Umindicates the duration for penalty.handover fails; in order to avoid handing over back to this cell andparameter indicates the duration for penalty.and the emergency handover fails; In order to avoid handing overparameter indicates the duration for penalty.service handover from the overlaid subcell to the underlaid subcellforbids a call service handover from the underlaid subcell to thewhether the number of handover failure retries has reached thethe filter parameter B. The actual values of A1 A8 = (A1A8)10.subcell to overlaid subcell only when its TA is less than a certaincertain threshold. This parameter indicates the threshold. The valueThe load handover will be triggered when the load of a cell exceedsThe target cell is able to receive the handovers from other cells onlywhether the handover is allowed. Only when the RX_Level of thesent for all connections simultaneously. It will cause a suddenbands. See the description of HO step level.HO watch time so as to determine whether the edge handover isdownlink should constantly remain lower than their correspondingwith PBGT watch time so as to determine whether the PBGTcells the path loss of the serving cell > PBGT HO Thrsh. lastshandover based on the RQI of the measurement report. If within Ptime that the RQI is higher than the handover threshold from TCHF tothreshold value, the handover is triggered.threshold value, the handover is triggered.inter-layer handover decision.inter-layer handover decision.state. It is not good for the system load to decrease effectively if thisWhen an MS has achieved the value set in MS Fast-moving WatchInterval for consecutive HO Jud. these two handovers will beUnderLaid subcell to OverLaid subcell.subcell to UnderLaid subcell.the judgment condition in the Concentric Cell handover judgment.as the judgment condition in the Concentric Cell handover judgment.the Concentric Cell handover judgment.subcell and UnderLaid subcell.RX-LEV Thrsh. works together with RX-LEV Hysteresis, RX-qualRX-LEV Hysteresis works together with RX-LEV Thrsh. RX-LEVthe parameters for determining the coverage of UnderLaid subcellDescription: When the "Enhanced Concentric Cell Allowed" is set as "No", TAhysteresis works together with RX-LEV Thrsh., RX-LEV Hysteresis,Concentric Cell handover decision.Concentric Cell handover decision.GSM900/DCS1800, the default is "System optimization"estimated (inserted/ filtered) as per the uplink measurement result inestimated (inserted/ filtered) as per the uplink measurement result inACCESS_DELAY in CHANNEL_REQUEST message.Description: While the TA pref. Of Imme-Assign Allowed is set as "Yes" and thecell is configured as an Concentric cell, the four processing methodsIn this case, the UnderLaid subcell can be selected preferably. Inconditions for underlaid to overlaid handover.underlaid subcell is over "Traffic Thrsh. of underlaid", MS will handoverlaid at the same time, system will hand over the call with lowhandover band is extended from 63 to 1. This can hand over the callwhen a call is handed over from an underlaid to overlaid subcell, toduration for this timer. This parameter is used to avoid incorrectis the duration for this timer. This parameter is used to avoidcommand, it will start a timer. BSC will not perform any handoverbefore this timer times out. This parameter is the duration for thisthat has emergency handover history due to too large value of TA oralgorithm.Note: Generally, this parameter is set to No.parameter is set to Yes, this can reduce system interference andparameter Transfer original MR. and Transfer BS/MS Power ClassBTS transfer to BSC not only the processed MRs, but also thepower class to BSC. This will affect the result of uplink and downlinkfor the two cells. This parameter is specially set to control theto Once every second.performed. The handover processing for the cell of the same MNCEach multi-MNC handover control strategy and its applicationEdge HO RX_LEV Thrsh. + Inter-cell HO hysteresis.Thrsh. of serving cell = value of Inter-layer HO Thrsh. - Inter-layerthe penalty level value. This parameter is valid only for the durationconsistent with the "Stable RX_LEV Expected" in conjunction with2. The parameter MSC shared or not affects the sequencing of the cell in the 13thwhen the receiving level of a neighboring cell "Min DL Level onvalue, the last MR received before the lost MRs and the next to thevalue, the last MR received before the lost MRs and the next to thelarge, the impact of sudden change will be reduced, as well as thelarge, the impact of sudden change will be reduced, as well as theMS is shorter than the TCH occupation time. So the value of thisthan the TCH occupation time, so the value of this parameter shouldto be too large, the impact of sudden change will be reduced, as wellinterface handover failure message is received in out-going BSCPing-Pong handover, a signal level penalty will be given to thisback to this cell and "Ping-Pong" handover, a signal level penaltyis not allowed in the defined penalty time.overlaid subcell in the defined penalty time.UL-to-OL HO Failure Retry number. If yes, it stops UL-to-OLThe actual parameter B value = minus value of the B value is set.threshold. This parameter indicates this threshold.of this parameter cannot be too great.-Unexpected consequenceLoad HO Thrsh.. The value of this parameter corresponds to TCHwhen the load of the target cell is lower than Load Req. on candidateserving cell is within the range of {Edge HO RX_LEV Thrsh., Edgeincrease of CPU load and call-drop due to the congestion of thetriggered.edge handover thresholds -y within a period of time. This parameterhandover is triggered.PBGT valid time.seconds in N seconds, the RQI is higher than the handover thresholdTCHH or lower than the handover threshold from TCHH to TCHF.parameter value is too great, but too small the value will causecells, and if there are MS Fast-moving Valid cells that are crossedregarded as consecutive intra-cell handovers. If the number ofThe parameter is invalidation while the "Enhanced Concentric CellThrsh, TA Thrsh. and TA hysteresis. This is to determine theHysteresis, RX-qual Thrsh, TA Thrsh. and TA hysteresis. This is toand OverLaid subcell together with RX_LEV Thrsh., RX_LEVThrsh. works together with RX-LEV Thrsh., RX-qual Thrsh, RX-LEVRX-qual Thrsh and TA Thrsh. This is to determine the boundaryDescription: In the Concentric cell, assign styles following:the previous SDCCH MR. OverLaid subcells and UnderLaid subcellsthe previous SDCCH MR. OverLaid subcells and UnderLaid subcellsIf it is set as "No", system prefer the channel in Underlaid subcell; if itACCESS_DELAY in CHANNEL REQUEST message is less than "TAof incoming intra-BSC handover request in BSC arethe case of 1800 and 900 that share the same site location, theIf it is set as "Yes", and the traffic in underlaid subcell is over "Trafficover from underlaid to overlaid; otherwise MS will stay in underlaidlevel. This does not accord with the principle that the best call shallwith high level firstly.prevent ping-pong handover, the call cannot be handed back to thehandover due to inaccurate MRs at the early stage of callincorrect handover due to inaccurate MRs at the early stage of callbefore this timer times out. This parameter is the duration for thistimer.bad quality.This algorithm requires that BTS must send the original MR to BSC.improve service quality.are invalid. If this parameter is set to "Yes", this will reduce the loadoriginal MRs.balance measurement.handover type of synchronous cells.will be the same as that for the cell of a different MNC. If "Y" isoccasion are given below.Notes: Make sure that the receiving level of the destination cell isHO hysteresis. Actual Inter-layer HO Thrsh. of neighboring cell =of Penalty Time on Fast Moving HOthe power control algorithm and the "UL RX_LEV upper Thrsh." inbit in the 16bit rule. Therefore, the improper setting of this parameter may lead toCandidate Cell" + this offset then this cell become a candidate cell.lost MRs will be averaged. The averaged value is regarded as thelost MRs will be averaged. The averaged value is regarded as theresponse speed for this kind of sudden change will be slower.response speed for this kind of sudden change will be slower.parameter should be less than that of Filter Length for TCH Level.be less than that of Filter Length for TCH Qual.as the response speed for this kind of sudden change will be slower.handover; or Um interface handover failure message is received incell. This parameter is the penalty of signal level to be given. Thiswill be given to this cell. This parameter is the penalty of signalsubcell handovers. Otherwise, the system will initiate an UL-to-OLTheir working formula is as follows:might occur when the system load is very high.occupancy percentage.cell. Otherwise, this cell refuses any handover request from otherHO RX_LEV Thrsh. + Load HO bandwidth} then the handover will betarget cell. Therefore, these requests will be divided into bands basedindicates this duration.from TCHF to TCHH, the handover from TCHF-TCHH is triggered. Ifinaccurate judgment.fast. In this case, fast moving handover will be triggered.consecutive intra-cell handovers exceeds MAX consecutive HOAllowed" is set as "Yes".boundary between OverLaid subcell and UnderLaid subcell. Thedetermine the boundary between OverLaid subcell and UnderLaidHysteresis, TA Thrsh, and TA Hysteresis.Hysteresis, and TA hysteresis. This is to determine the boundarybetween OverLaid subcell and UnderLaid subcell.1) System optimization mode indicate the system selects theare allocated as per the comparison result between the receivingare allocated as per the comparison result between the receivingis set as "No", system prefer the channel in overlaid subcell whileThrsh. Of Imme- Assign pref.", system will prefer the channel in1) System Optimization, Add the receiving level of the targetinter-BSC handover is hardly triggered at the edge of a cell. TheThrsh. of underlaid", MS will hand over from underlaid to overlaid.subcell because the signal quality is good.be handed over firstly.The parameter is the step that handover band decreases.underlaid subcell in the "Penalty Time of UL to OL HO (S)".establishment. The value of this parameter when MR isestablishment. The value of this parameter when MR istimer.of Abis interface signaling and also the load of BSC. It also improvesNote: In the case of 15:1 function, if the number of SDCCH/8s should beNote: When MR Pre-process is enabled, the result of uplink andIf you select No, the type of handovers in and between synchronousselected, the multi-handover decision will be performed. The1, Normal handoverhigher than inter-layer HO threshold in hierarchical handover or loadvalue of Inter-layer HO Thrsh. + Inter-layer HO hysteresis.conjunction with the HW II power control algorithm.handover failure.lost MR. Otherwise, all previous MRs are discarded, andlost MR. Otherwise, all previous MRs are discarded, andSee the following table for reference about the relation betweeninternal handover), a penalty will be given to this cell in order topenalty is valid only during the duration of Penalty time after BQlevel to be given. This penalty is valid only during the duration ofsubcell handover.C1 (nt) = A1 % C(nt) + A2 % C(nt-t) + A3 % C(nt-2t) + + A8 %Note: Even if load handover is not active, such parameters as Load HO Thrsh andcells.allowed.on the receiving strength. For example, band1 is within the rangewithin P seconds in N seconds, the RQI is lower than the handovertimes, intra-cell handover will be forbidden within Forbidden timeNote: Intensity difference between OverLaid subcell and UnderLaid subcell = Powervalue of this parameter must be greater than the Edge HO Thrsh. Itsubcell.When the "Enhanced Concentric Cell Allowed" is set as "Yes", One ofbetween OverLaid subcell and UnderLaid subcell.When the "Enhanced Concentric Cell Allowed" is set as "Yes", One ofoptimum layer for TCH assignment as according to MRs providedlevel of SDCCH and Assign-Optimum-Level Thrsh, and thatlevel of SDCCH and Assign-Optimum-Level Thrsh, and thatACCESS_DELAY is less than "TA Thrsh. Of Imme- Assign pref.",overlaid subcell, otherwise prefer the channel in underlaid subcell.Concentric cell with the handover request. Then the target cellOverLaid subcell can be selected preferably. If the handover successIf "UL to OL Traffic HO Allowed" is set as "No", and the traffic inIf "UL to OL Traffic HO Allowed" is set as "No", and the traffic inThe grade by grade algorithm is used to hand over an MS with highNote:If this parameter is set to 0, there is no penalty for the UL-to-OLpre-processed by BTS should be smaller than that when MR is notpre-processed by BTS should be smaller than that when MR is notresponse time and network performance. Meanwhile, this parametergreater than or equal to 2, this parameter should be set to No.downlink balance measurement will be affected if Transfer BS/MScells is synchronous.handover control will be performed according to the selected Control strategy: hand over to a cell providing better servicehandover. Otherwise, MS hands over from large load high level cellSee the [Cell Description Table].calculations are made again when new MRs are received.calculations are made again when new MRs are received.quality class and BER.avoid retry to hand over to this cell. This parameter is the penalty ofHO Fail.Penalty time after TA HO FailNote: If the UL-to-OL HO Failure Retry number is 0, there is noC(nt-7t), where:Load HO Receiving Thrsh will affect the sequence of candidate cells (BIT No.11 ofNote: Even if load handover is not active, such parameters as Load HO Thrsh and{Edge HO RX_LEV Thrsh., Edge HO RX_LEV Thrsh. + Load HOthreshold from TCHH-TCHF, the handover from TCHH to TCHF isafter MAX timesamplification power difference between OverLaid subcell and UnderLaid subcell +is recommended that RX-LEV Thrsh. > Edge HO Thrsh. + ConcentricThe parameter is invalidation while the "Enhanced Concentric Cellthe parameters for determining the coverage of Underlaid subcell andWhen the "Enhanced Concentric Cell Allowed" is set as "Yes", One ofthe parameters for determining the coverage of Underlaid subcell andthrough the ULs SDCCHbetween TA and Assign-Optimum-TA Thrsh. That is, MS will bebetween TA and Assign-Optimum-TA Thrsh. That is, MS will beotherwise prefer the channel in Underlaid subcell.compares the receiving level with RX_LEV Thrsh. to select therate is low, it is recommended that the UnderLaid subcell should beunderlaid subcell will not be considered when MS hand over fromunderlaid subcell will not be considered when MS hand over fromlevel.It is used to control the grade by grade handover band fromhandover.pre-processed by BTS.pre-processed by BTS.determines the place where to perform power control. If thispower class is set as No. Besides, such power compensationIf you select Yes, the type of handovers in and betweenMulti-MNC HO type.quality (in respect of level, quality, cell class, load and whether(high priority cell) to small load low level cell (low priority cell), andNote: MRs will lose continuously if the active cell does not serveNote: MRs will lose continuously if the active cell does not serveQuality class BERsignal level to be given. This penalty is valid only during therestriction on the number of retries upon handover failure, but thereC (nt) is the uplink RX_Level of the serving cell in the MR received16 Bit criterions). Therefore, improper setting of this parameter will result in PBGTLoad HO Receiving Thrsh will affect the sequence of candidate cells (BIT No.11 ofstep period}; band2 is within the range {Edge HO RX_LEV Thrsh. +triggered. Here, the N seconds is the intracell TCHF-TCHHcombiner insertion loss difference + path loss difference caused by differentCell Signal Intensity Difference.Allowed" is set as "Yes".OverLaid subcell together with RX-qual Thrsh , UL to OL HOthe parameters for determining the coverage of Underlaid subcell andOverLaid subcell together with UL to OL HO received level Thrsh.,2) UnderLaid Subcell: UnderLaid Subcells are assigned first;allocated with OverLaid Subcell only if the receiving level is greaterallocated with UnderLaid Subcell only if the receiving level is greateroptimum layer, without regard to RX_LEV Hysteresis.selected preferably.underlaid to overlaid.underlaid to overlaid.The parameter is the time for that the handover band levelunderlaid to overlaid with "Underlaid HO Step period".Note: When "Enhanced Concentric Cell allowed" is set as "Yes", it isparameter is set to Yes, then the power control will be performedhandovers as PBGT handover, load handover and concentricsynchronous cells is asynchronous.For the situation where there are multiple MNCs, it is recommendedthe serving cell shares BSC\MSC).MS is disconnected as a result.well. Once the number of MRs lost continuously is greater than thiswell. Once the number of MRs lost continuously is greater than this0 Less than 0. 2%duration of Penalty time after HO fail.is restriction on the handover failure penalty time.at the time of nt.handover (and other handovers) failure when cell load is heavy.16 Bit criterions). Therefore, improper setting of this parameter will result in PBGTLoad HO step period, Edge HO RX_LEV Thrsh. + 2 Load HO stephandover statistics time. P seconds is the intracell TCHF-TCHHantennas + path loss difference caused by different frequencies selected. TheThe parameter is invalidation while the "Enhanced Concentric Cellreceived level Thrsh., OL to UL HO received level Thrsh., TA Thrsh,OverLaid subcell together with UL to OL HO received level Thrsh.,OL to UL HO received level Thrsh., RX-qual Thrsh , TA Thrsh .3) OverLaid Subcell: OverLaid Subcells are assigned first.than "Assign-Optimum-Level Thrsh", and TA smaller thanthan Assign-Optimum-Level Thrsh, and TA smaller than2) UnderLaid Subcell: UnderLaid Subcells are assigned first;Note: BCCH carrier must be configured as UnderLaid subcell.Note: When "Enhanced Concentric Cell allowed" is set as "Yes", it isNote: When "UL to OL Traffic HO Allowed" is set as "Yes", it is available.decreases "Underlaid HO Step level".The "Underlaid HO Step period" is the time for that the handoveravailable.by BTS. Otherwise, the power control will be performed by BSC.handover are abnormal.to configure this parameter with "Y"; otherwise, with "N". Application occasion: MS is expected to hand over to a cellparameter value, all previous MRs will be discarded and handoverparameter value, all previous MRs will be discarded and handover1 0.2% to 0.4%If C1 (nt) 8 +Idle TCH Thrsh.,If the parameter "apply TCH decision period T(m)" is not 0, the twoallocate full rate channel preferentially.allocation.not allowed to be configured:Note: This threshold must be lower than the TCH Traffic Thrsh.together with the "Update Freq. of CH record works to prevent aNote HW_II algorithm is recommended only in version BSC1120 or2, BSC06.1120A supports single-TRX cell SDCCH dynamic conversion.The conditions to Initiate the TCH-to-SDCCH conversion flow:then: the Count minus 3. If the current idle SDCCH channels < 8 +parameters determine when dynamic PDCH converts to TCH andNote:Note: Defining the highest priority ;channel from being allocated again, which has been deteriorated forabove.1)The number of idle SDCCH channels is less than or equal to "IdleIdle TCH Thrsh., then plus 12 to Count, but the Count must notwhen TCH converts dynamic PDCH. There is a count in every cellCell channel occupation rate = (Number of busy TCH/F + number ofCouple: when one timeslot is divided into two TCHHs and the two The number of TCHs reserved.a period of time.SD Thrsh".exceed ResTime. If the current idle SDCCH channels = 8 + Idleand the range of count is from -T to T. The initial value of the countTCH/H/2)/ (Number of available TCH/F + number of availableTCHHs are idle. The two TCHH are called Couple.2)The number of current idle full rate TCH channels is more than 4TCH Thrsh., then Count remains unchanged. After the adjustment, ifis 0. The count adjust every minute. If idle TCH channels are moreTCH/H/2)Single: when one timeslot is divided into two TCHHs, and oneor more than the number of TRXs.Count 0, then one TCH channel will be recovered.than N1, the count add 1 and the maximum of the count is T. If idleTCHH is busy and the other is idle. The idle one is called Single.3)The number of current SDCCH channels plus 8 is less than or2) Due to TRX hardware processing capability restriction, at most 2TCH channels are no more than N1, the count reduce 1and theequal to "Cell SD maximum".time slots can be configured as SDCCH channels for each TRX.minimum of the count is -T. When the adjustive count value is lessTo initiate the TCH-to-SDCCH conversion, if the selected TCH isthan T/2 and there is at least one dynamic PDCH which is usedoccupied, the connection will be handed over to other idle TCHPDCH, the BSC will apply to PCU for TCH.channel in this cell. During dynamic SDCCH channel allocation,On the other hand, after PCU applies to BSC for dynamic PDCH,each time only one TCH is converted into SDCCH. So does theBSC must judge if the count value no less than T/2.Only when theSDCCH-to-TCH conversion.count value is no less than T/2, it is allowed for the BSC to assign3) During the TCH-to-SDCCH conversion, TCH channels on TRX indynamic PDCH to PCU.where BCCH is located should not be selected.