诺基亚2G切换参数(新).ppt

HANDOVERPROCESS切换过程 BSSPARS9 HANDOVERPROCESS切换过程Contents内容 1 Overview概述2 HandoverDecision切换判决3 TargetCellSelection目标小区选择4 Algorithms算法5 PowerBudgetHandover功率预算切换6 Level QualityHandover电平 质量切换7 UmbrellaHandover伞切换8 TimersforHandovers切换记时器 HANDOVERPROCESS切换过程 WhatisthepurposeofHO 切换的目的是什么 Callcontinuity呼叫连续性Callquality呼叫质量Others 其它 HANDOVERPROCESS切换过程Causes原因 TimingAdvance AdjacentCells DownlinkQuality UplinkQuality AV RXQUAL UL HO AV RXQUAL DL HO DownlinkLevel UplinkLevel AV RXLEV UL HO AV RXLEV DL HO AV RANGE HO AV RXLEV NCELL n QUALITY INTERFERENCE LEVEL DISTANCE PERIODICCHECKS UMBRELLA POWERBUDGET IMPERATIVEHO CHANNELADMINISTRATION DIRECTEDRETRY THRESHOLDCOMPARISON RAPIDFIELDDROP Others其它 IntelligentUnderlayOverlay智能层叠覆盖TrafficReason话务量原因 MSSPEED MSSpeed AV MS SPEED HANDOVERPROCESS切换过程HandoverDecision切换判决 Handoverprocessmaybetriggeredby切换过程可以由以下因素触发 Quality fieldstrengthordistancevaluesfallbelow exceedtheirthreshold质量 场强或者距离值低于 超过门限Periodicchecks周期性检查PowerbudgetHO功率预算切换UmbrellaHO伞型切换 HANDOVERPROCESS切换过程HandoverPriority切换优先级 Handoverpriority切换优先级 1 UplinkanddownlinkInterference上行和下行干扰2 Uplinkquality上行质量3 Downlinkquality下行质量4 Uplinklevel上行电平5 Downlinklevel下行电平6 Distance距离7 RapidFieldDrop快速场强衰落8 SlowmovingMS慢速移动手机9 Bettercelli e Periodiccheck PowerBudgetHOorUmbrellaHO 更好小区 例如 周期性检查 功率预算切换或者伞型切换 10 PC Lowerquality levelthresholds UL DL 质量 电平下限 上行 下行 11 PC Upperquality levelthresholds UL DL 质量 电平上限 上行 下行 HANDOVERPROCESS切换过程HandoverAlgorithms切换算法 AV RXLEV NCELL n hoLevelUmbrella n PBGT hoMarginPBGT n wherePBGT msTxPwrMax msTxPwrMax n AV RXLEV DL HO AV RXLEV NCELL n btsTxPwrMax BTS TXPWR AV RXLEV NCELL n rxLevMinCell n Max 0 A A msTxPwrMax n PP dependingonMSClassmark取决于手机Classmark PBGT hoMarginLev Qual n wherePBGT AV RXLEV NCELL n AV RXLEV DL HO btsTxPwrMax BTS TXPWR 1 2 1 InallHandovercases inimperativeHOonlyrequirement 在所有切换中 紧急切换的话是唯一的条件 ExceptforUmbrellaHandover伞型切换例外 2 Theadditionalcondition附加条件 HANDOVERPROCESS切换过程TargetCellSelection 1 目标小区选择 IftwoormoreAdjacentcellswithequalpriorities Rankingbasedonradioproperties如果两个或者更多邻区具有相同优先级 基于无线特性排队 LoadcheckofCandidatesbybtsLoadThreshold 0 100 候选小区的负荷检查IfoverloadedprioritydecreasedbyhoLoadFactor 0 7 如果超负荷 则降低优先级 BestcandidatestoRRManagement无线资源管理的最佳候选小区 intraBSCHOmax16cellsunderthesameBSCasthesourcecell同BSC切换时一个BSC下最多有16个小区作为目标小区interBSCHOBSC之间切换numberOfPreferredCells ComparisonofprioritiesofCandidates hoLevelPriority 0 7 候选小区优先级比较 1 2 3 HANDOVERPROCESS切换过程TargetCellSelection 2 目标小区选择 Allcellshaveequalpriority具有相同优先级的所有小区 cellabcRx Level 75 80 831 Loadoverl overl n overl hoLoadFactor1112 Priority333NewPriority2233 Rx Level 75 80 celllistc a b Onecellhashigherprioritybecauseofsomereason一个小区因为某种原因而具有更高优先级 cellabcRx Level 75 80 831 Loadn overl n overl n overl hoLoadFactor2112 Priority433NewPriority4 2333 Rx Level 75 80 80 83 celllista b c ifcellaisnotoverload celllistb c a PBGT msTxPwrMax msTxPwrMax n AV RXLEV DL HO AV RXLEV NCELL n btsTxPwrMax BTS TXPWR PBGT 33dBm 33dBm 90 80 42dBm 42dBm 10dB10dB 6dBOK AV RXLEV NCELL n rxLevMinCell n Max 0 msTxPwrMax n msTxPwrMax 80dBm 99dBm 33dBm 33dBm 99dBm 1 2 Equations1and2areused使用方程1和2 AV RXLEV DL HO 90dBmmsTxPwrMax 33dBm 2W btsTxPwrMax 42dBm 16W BTS TX PWR 42dBm 16W hoMarginPBGT n 6dB ServingCell服务小区 BestAdjacentCell最佳相邻小区 AV RXLEV NCELL n 80dBmrxLevMinCell n 99dBmmsTxPwrMax n 33dBm 2W btsTxPwrMax 42dBm 16W HANDOVERPROCESS切换过程PowerBudgetHandover 1 功率预算切换 HANDOVERPROCESS切换过程PowerBudgetHandover功率预算切换 2 Trigger触发PeriodicCheck周期性检查 hoPeriodPBGT CandidateSelection候选小区选择Equation1 2used使用方程1和2PriorityandLoadConsidered考虑优先级和负载Typicallyusedbetweencellsofthesame Layer 用于同层的不同小区之间 hoPeriodPBGT1 63 SACCHPeriod enablePwrBudgetHandoverY N ParameterValue rxLevMinCell n 110 47dBmmsTxPwrMax n 5 43dBmhoMarginPBGT n 24 24dB HANDOVERPROCESS切换过程HandoverduetoLevel 1 2 由于电平的切换 Trigger触发ThresholdComparison门限比较 hoThresholdsLevUL DL px nx CandidateSelection侯选小区选择Equation1used使用方程1Equation2usedifenableHoMarginLevQual N使用方程2Equation2 withhoMarginLevusedifenableHoMarginLevQual YPriorityandLoadConsidered考虑优先级和负载 hoThresholdLevUL DL 110 47px1 32nx1 32 ParameterValue rxLevMinCell n 110 47dBmmsTxPwrMax n 5 43dBmhoMarginLev n 24 24dB HANDOVERPROCESS切换过程HandoverduetoLevel 2 2 Equations1and2 areusedifparameterenableHoMarginLevQualisset Yes 如果参数enableHoMarginLevQual设为 Yes 则使用方程1和2 2dB hoMarginLev 4dB TriggerforHandoverduetoLevel触发由于电平的切换 A B CellBisnotselectedascandidateforHOduetolevelsince2dB 4dBB小区不被作为电平切换的侯选小区 因为2dB 4dB Threshold Lev 95dBm HANDOVERPROCESS切换过程HandoverduetoQuality质量切换 1 2 Trigger触发ThresholdComparison门限比较 hoThresholdsQualUL DL px nx CandidateSelection候选小区选择Equation1used使用方程1Equation2usedifenableHoMarginLevQual N使用方程2Equation2 withhoMarginQualusedifenableHoMarginLevQual YPriorityandLoadConsidered考虑优先级和负载 hoThresholdQualUL DL0 7px1 32nx1 32 ParameterValue rxLevMinCell n 110 47dBmmsTxPwrMax n 5 43dBmhoMarginQual n 24 24dB HANDOVERPROCESS切换过程HandoverduetoQuality质量切换 2 2 Equations1and2 areusedifparameterenableHoMarginLevQualisset Yes 如果参数enableHoMarginLevQual设为 Yes 则使用方程1和2 2dB hoMarginQual 0dB TriggerforHandoverHOduetoQuality触发质量切换 A B CellBisselectedaspotentialcandidateforHOduetoQualitysince2dB 0dBB小区选为质量切换的潜在侯选小区 因为2dB 0dB Threshold Lev 95dBm HANDOVERPROCESS切换过程HandoverduetoInterference干扰切换 1 2 Trigger触发 ThresholdComparison门限比较ThresholdComparisonforQuality质量门限切换 hoThresholdsQualUL DL px nx ThresholdComparisonforLevel电平门限切换 hoThresholdsInterferenceUL DL px nx CandidateSelection候选小区选择PriorityInterCell IntracellselectedatBSCindependentlyUL DLBSC上下行小区间 小区内优先级PriorityInterQualityHOifAnyTargetOtherwiseIntraCellHO enableIntraHoInterfUL DLY NhoThresholdInterferenceUL DL 110 47px1 32nx1 32 ParameterValue hoPreferenceOrderInterfUL DLINTER INTRABSC PriorityIntraIntraCellHO小区内切换 HANDOVERPROCESS切换过程HandoverduetoInterference干扰切换 2 2 Equations1and2 areusedifparameterenableHandoverMarginQualisset Yes 如果参数enableHandoverMarginQual设为 Yes 则使用方程1和2 hoThresholdQual 4hoThresholdInterferenceDL 85dBmhoPreferenceOrderInterfDL intra TriggerforHandoverduetoInterference干扰切换触发 A B Fieldstrengthhigherthanthreshold场强高于门限 Badquality质量差 Interference干扰 intracellhandover 小区内切换 Threshold InterferenceLev 85dBm 5 0 HANDOVERPROCESS Parameters enableBSSHandoverControlenableIntracellHandoverenablePwrBudgetHandoverenableMSDistanceHandoverenableSDCCHHandoverenableUmbrellaHandover hoPeriodPBGT HPP hoPeriodUmbrella HPU Parameter Value hoThresholdsLevDL UL LDR LUR rxLevelpx LDP LUP 默认是1nx LDN LDP 默认是1 110 47 dBm 1 321 32 Yes NoYes NoYes NoYes NoYes NoYes No 0 63 SACCHperiods 0 63 SACCHperiods HANDOVERPROCESS Parameters continued Parameter Value hoThresholdsQualDL ULrxQualpxnx 0 71 321 32 msDistanceHoThresholdParammsRangeMaxpxnx 0 63 TA 1 321 32 110 47 dBm 1 321 32 hoThresholdsInterferenceDL ULrxLevelpxnx HANDOVERPROCE