Connected Mode Mobility
Overview
Handovers Introduction Handovers in LTE are: • Hard handovers: resources are prepared in the target cell before the UE is commanded to move to the target cell • Lossless: Packets are forwarded from the source to the target cell. • Network controlled: The target cell is selected by the network not by the UE. The handover control is in the e-UTRAN not in the Core Network. • UE-assisted: Measurements are made and reported by the UE to the network although it is the network (eNodeB) which triggers those measurements. • Late path switch: Only when the inter eNodeB handover is successful, the packet core is involved (X2 required).
Connected Mode Mobility Options •
Intra-LTE (or Intra-RAT) handovers: – Intra frequency handovers → within the same frequency band. There are 2 scenarios : Intra-eNodeB handover (i.e. inter sector/ intra site) Inter-eNodeB handover (i.e. inter site) Inter-eNodeB handover can happen via the X2 interface or via the S1 interface. The DL data forwarding over X2 is applied for lossless data path switching.
– Inter-frequency handovers that allow service continuity for LTE deployments in different frequency bands and also for LTE deployments within one frequency band but with different centre frequencies.
• Inter-RAT handovers: • These are the handovers to other radio access technologies (RAT) to provide continuous PS coverage: • LTE HO to WCDMA • LTE HO to/from GSM • LTE HO to/from HRPD (3GPP2) • Network assisted cell change (NACC) to GSM • Unlike in the handover procedure no resources are prepared in the target system. The UE will enter GSM in RRC Idle mode and start the RRC Connection Setup procedure in GSM
HO Process Overview Measurements activation/de-activation
UE continuously monitors the serving cell. Events A2/A1* are used to activate/de-activate neighbors measurements when radio conditions are getting worse
Event based neighbor reports
The reports of neighbors are triggered by A3 & A5 events for intra-RAT neighbors and B2 event for the inter-RAT neighbors
Measurement Reports from UE
The “Measurement Report” message contains a prioritized list of neighbors (best neighbor first)
HO target & mode selection in eNodeB
HO execution
eNodeB decides the urgency of HO and identifies a prioritized list of HO target cells. The eNodeB selects the target cell for HO as well as the handover mode. The HO/NACC mode could be: -Intra eNB HO -Intra LTE inter eNB via X2 -Intra LTE inter eNB via S1 -HO to WCDMA -NACC to GSM
* LTE standard supports events A1-A5 & B1, B2 NACC= network assisted cell change
Measurements Management
Measurement Concept (1/2) • •
Intra-LTE (Intra-frequency & inter-frequency) measurements RSRP & RSRQ as event-triggering & reporting quantity
•
Resulting configurable events for reporting to E-UTRAN – Event A2/A1: Serving cells RSRP down/upcrossing certain RSRP threshold – Event A3: Neighbor cell’s RSRP is a predefined offset better than serving cell’s RSRP – Event A5: Serving cell’s RSRP downcrossing certain threshold, while neighbor cell’s RSRP upcrossing an other threshold
RSRP
RSRP
RSRP A3 trigger
A2 trigger
A5 trigger
A5 thold 2 A3 offset
A2 threshold RSRP serving move direction
RSRP serving move direction
A5 thold 1 RSRP serving move direction
Measurement Concept (2/2) • • • •
Inter-RAT measurements RSRP or RSRQ as event-triggering & reporting quantity for LTE serving cell For Inter-RAT reports trigger RSSI is used in case of GERAN and CPICH RSCP or CPICH EC/N0 in case of UMTS Event B2: Serving cell`s RSRP downcrossing threshold 1, while neighbor cell RSSI or CPICH RSCP or CPICH Ec/No upcrossing threshold 2 Signal Level B2 trigger B2 thold 2
Inter-RAT Neighbor cell signal B2 thold 1
RSRP serving move direction
Intra-frequency Measurements Activation/De-activation • • •
UE continuously monitors the serving cell RSRP eNodeB configures the neighbour measurements using different thresholds RSRP > Threshold1 (3GPP: s-measure) => no measurements of neighbours UE does not measure nor report any neighbor cells (applicable to intra-, interfrequency and also interRAT case)
RSRP of serving cell
threshold1 If RSRP of serving cell is greater than th1, only serving cell is measured LNCEL; 0..97dB; 1dB; -
threshold1
threshold1
-140 dBm
UE measures intra-frequency neighbors. Inter-frequency / interRAT see below.
time Absolute power level: -140 dBm + threshold1 Example: if threshold 1 = 55dB -> RSRP = -140dBm + 55 dB = -85 dBm
Inter-frequency Measurements Activation • •
Threshold2 activates the inter-frequency measurements (event A2) Hysteresis & time to trigger could be set threshold2InterFreq Trigger for inter-frequency measurements
RSRP of serving cell
LNCEL; 0..97dB; 1dB; -
threshold2InterFreq
Hysteresis
UE measures inter-frequency neighbors and reports A3 or A5 if respective condition(s) are met hysThreshold2InterFreq
-140 dBm
Hysteresis of Threshold2InterFreq LNCEL; 0..15dB; 0.5dB; -
Activate Interfrequency measurement a2Time To Trigger
time a2TimeToTriggerActInte rFreqMeas Duration for which the event A2 must be valid LNCEL; 0ms..5120ms; -; -
Inter-frequency & Inter-RAT Measurements Activation • •
Similarly there are different RSRP thresholds for the activation of the inter-frequency and/or inter-RAT (GERAN or UMTS) measurements Also different hysteresis and time to trigger could be set Threshold2: threshold2InterFreq threshold2Wcdma threshold2GERAN
RSRP of serving cell
threshold2
Hysteresis
UE measures inter-frequency neighbors (and reports A3 or A5) and potentially mesures inter-RAT neighbors (and reports B2)
-140 dBm
Activate Inter-frequency or potentially Inter-RAT measurement a2Time To Trigger
Hysteresys:
Time to Trigger:
hysThreshold2InterFreq
a2TimeToTriggerActInterFreqMeas
hysThreshold2Wcdma
a2TimeToTriggerActWCDMAMeas
hysThreshold2GERAN
a2TimeToTriggerActGERAN
time
Measurement Activation radio coverage by RSRP decreases RSRP (reported)
Threshold2GERAN Intra-frequency & Interfrequency & GERAN & UMTS measurements
Threshold2Wcdma
Intra-frequency & Interfrequency & UMTS measurements
Threshold2InterFreq
Intra-frequency & Interfrequency measurements
Threshold1
Intrafrequency measurements only
No neighbors measurements except the serving cell
Assumptions* for this example: Threshold2GERAN < Threshold2Wcdma < Threshold2InterFreq< Threshold1 threshold2InterFreq
threshold2GERAN
threshold2Wcdma
Trigger for inter-frequency measurements
Trigger for GERAN measurements
Trigger for WCDMA measurements
LNCEL; 0..97dB; 1dB; -
LNCEL; 0..97dB; 1dB; -
LNCEL; 0..97dB; 1dB; -
* Please note that this is an example only. The priority of the measurements activation could be set-up by using the appropriate threshold settings
Inter-frequency & Inter-RAT Measurements De-activation •
Common Threshold2a for the de-activation of inter-frequency and inter-RAT (GERAN or UMTS) measurements (event A1) threshold2a
RSRP of serving cell
Stop inter-frequency measurements LNCEL; 0..97dB; 1dB; -
Threshold2a Hysteresis
a1Time To Trigger
De-activate Inter-frequency measurement
time -140 dBm
hysThreshold2a
a1TimeToTriggerDeactInterMeas
Hysteresis of Threshold2a
Duration for which event A1 must be valid
LNCEL; 0..15dB; 0.5dB; 2dB
LNCEL; 0..5120ms; -; -
Connected Mode – Measurement Activation Parameter Category
Parameter
Intra Frequency Start Measurement
Start Measurement Inter Frequency Hysteresis Start Meas. Time To trigger
Start Measurement Inter RAT UMTS Hysteresis Start Meas. Time To trigger
Start Measurement Inter RAT GSM Hysteresis Start Meas. Time To trigger
Huawei Parameter Name
Time To trigger
EID Parameter Name
[HoMeasComm] SMeasure [HoMeasComm] SMeasureInd
[LNCEL] threshold1
[UeMeasControl] sMeasure
[InterFreqHoGroup] InterFreqHoA2ThdRsrp
[LNCEL] threshold2InterFreq
[ReportConfigEUtraBadCovPrim] a2ThresholdRsrpPrim
ZTE Parameter Name [EUtranCellMeasurement] intraFHOMeasCfg [UeEUtranMeasurement] thresholdOfRSRP [EUtranCellMeasurement] openInterFMeasCfg [UeEUtranMeasurement] thresholdOfRSRP
[InterFreqHoGroup] InterFreqHoA1A2Hyst [InterFreqHoGroup] InterFreqHoA1A2TimeToTrig
[ReportConfigEUtraBadCovPrim] [UeEUtranMeasurement] hysteresis hysteresisA2Prim [ReportConfigEUtraBadCovPrim] [LNCEL] [UeEUtranMeasurement] timeToTrigger a2TimeToTriggerActInterFreqMeas timeToTriggerA2Prim
[InterRatHoCommGroup] InterRatHoA2ThdRsrp
[ReportConfigEUtraBadCovPrim] a2ThresholdRsrpPrim
[InterRatHoCommGroup] InterRatHoA1A2Hyst [InterRatHoCommGroup] InterRatHoA1A2TimeToTrig [InterRatHoCommGroup] InterRatHoA2ThdRsrp [InterFreqHoGroup] InterFreqHoA1A2Hyst [InterRatHoCommGroup] InterRatHoA1A2TimeToTrig
Stop Measurement Inter Freq & Inter RAT Hysteresis Stop Meas
Nokia Parameter Name
Default Value -80 dBm
-112 dBm
[LNCEL] hysThreshold2InterFreq
[LNCEL] threshold2Wcdma
[LNCEL] hysThreshold2Wcdma [LNCEL] a2TimeToTriggerActWcdmaMeas [LNCEL] threshold2GERAN
[LNCEL] hysThreshold2GERAN [LNCEL] a2TimeToTriggerActGERANMeas [LNCEL] threshold2a
Start Meas - hysteresis [LNCEL] hysThreshold2a [LNCEL] a1TimeToTriggerDeactInterMeas
[EUtranCellMeasurement] openRatFMeasCfg, wcdmaMeasCfg [UeEUtranMeasurement] thresholdOfRSRP
-114 dBm
[ReportConfigEUtraBadCovPrim] [UeEUtranMeasurement] hysteresis hysteresisA2Prim [ReportConfigEUtraBadCovPrim] [UeEUtranMeasurement] timeToTrigger timeToTriggerA2Prim [ReportConfigEUtraBadCovPrim] a2ThresholdRsrpPrim
[EUtranCellMeasurement] openRatFMeasCfg, geranMeasCfg [UeEUtranMeasurement] thresholdOfRSRP
[ReportConfigEUtraBadCovPrim] [UeEUtranMeasurement] hysteresis hysteresisA2Prim [ReportConfigEUtraBadCovPrim] [UeEUtranMeasurement] timeToTrigger timeToTriggerA2Prim [ReportConfigA1Prim] a1ThresholdRsrpPrim [ReportConfigA1Prim] hysteresisA1Prim [ReportConfigA1Prim] timeToTriggerA1Prim
[EUtranCellMeasurement] closedInterFMeasCfg [UeEUtranMeasurement] thresholdOfRSRP [UeEUtranMeasurement] hysteresis [UeEUtranMeasurement] timeToTrigger
-108 dBm
Intra Frequency HO - Better Cell HO
Better Cell Handover • Better Cell Handover aims to keep the UE always on best cell (measured by RSRP) • Based on 3GPP reporting event „A3“: Event A3 defines relative offset LNCEL: a3-offset Timer to Trigger LNCEL: a3-TimeToTrigger Reporting Interval LNCEL: a3-ReportInterval
RSRP at serving cell + a3Offset < RSRP at neighbor cell
• Better Cell Handover can be enabled / disabled: enableBetterCellHo LNCEL; 0 (false), 1 (true); 1 (true)
Handovers Event A3 used for Better Cell HO RSRP at serving cell + a3Offset < RSRP at neighbor cell RSRP
a3Offset LNCEL; -15..15dB; 0.5dB; -
RSRP Neighbor Cell
A3 condition met
a3ReportInterval the interval with which measurement reports are repeatedly sent
a3offset
LNCEL; 120ms (0), 240ms (1), 480ms (2), 640ms (3), 1024ms (4), 2048ms (5), 5120ms (6), 10240ms (7), 1min (8), 6min (9), 12min (10), 30min (11), 60min (12); -
Serving Cell RSRP
time a3TimeToTrigger LNCEL; 0ms (0), 40ms (1), 64ms (2), 80ms (3), 100ms (4), 128ms (5), 160ms (6), 256ms (7), 320ms (8), 480ms (9), 512ms (10), 640ms (11), 1024ms (12), 1280ms (13), 2560ms (14), 5120ms (15); -
a3TimeToTrigger
a3Report Interval Measurement Report
reporting condition met after Time To Trigger
Measurement Report
eNB
Better Cell HO Parameter Category
Parameter Switch
A3 Offset Better Cell HO Intra Freq Hysteresis A3 Report Interval Time to Trigger Switch
A3 Offset Better Cell HO Hysteresis A3 Inter Freq Report Interval
Time to Trigger
Huawei Parameter Name [ENodeBAlgoSwitch] HoAlgoSwitch IntraFreqCoverHoSwitch [IntraFreqHoGroup] IntraFreqHoA3Offset [IntraFreqHoGroup] IntraFreqHoA3Hyst [IntraRatHoComm] IntraFreqHoRprtInterval [IntraFreqHoGroup] IntraFreqHoA3TimeToTrig [ENodeBAlgoSwitch] HoAlgoSwitch InterFreqCoverHoSwitch [InterFreqHoGroup] InterFreqHoA3Offset
Nokia Parameter Name
EID Parameter Name
ZTE Parameter Name
Default Value
[LNCEL] enableBetterCellHo
[LNCEL] a3Offset
[ReportConfigEUtraBestCell] a3offset
[LNCEL] hysA3Offset
[ReportConfigEUtraBestCell] hysteresisA3
[LNCEL] a3ReportInterval [LNCEL] a3TimeToTrigger
[ReportConfigEUtraBestCell] timeToTriggerA3
[CellMeasGroup] intraFHOMeasCfg [UeEUtranMeasurement] a3Offset [UeEUtranMeasurement] hysteresis [UeEUtranMeasurement] reportInterval [UeEUtranMeasurement] triggerQuantity
3 dB
320 ms
[LNBTS] actIfHo
[LNHOIF] a3OffsetRsrpInterFreq
[ReportConfigEUtraIFBestCell] a3offset
[LNHOIF] [ReportConfigEUtraIFBestCell] hysA3OffsetRsrpInterFreq hysteresisA3 [LNHOIF] a3ReportIntervalRsrpInterFre q [LNHOIF] [ReportConfigEUtraIFBestCell] a3TimeToTriggerRsrpInterFre timeToTriggerA3 q
[CellMeasGroup] interFHOMeasCfg [UeEUtranMeasurement] a3Offset [UeEUtranMeasurement] hysteresis
3 dB
[UeEUtranMeasurement] reportInterval [UeEUtranMeasurement] triggerQuantity
320 ms
Intra Frequency HO - Coverage HO
Coverage Handover •
Coverage Handover is used to HO to other eUTRA cell in case:
– serving cell RSRP gets below an abolute threshold and (&&) – neighbor cell RSRP gets better than an absolute threshold • Based on 3GPP reporting event „A5“: 3GPP „ThresholdEUTRA“ used to define absolute RSRP level for a) serving cell: LNCEL: threshold3 and b) neighbor cell: LNCEL: threshold3a Timer to Trigger LNCEL: a5-TimeToTrigger Reporting Interval LNCEL: a5-ReportInterval
•
Better Cell Handover can be enabled / disabled: enableCovHo LNCEL; 0 (false), 1 (true); 1 (true)
3GPP event A5 is UE optional; eNB knows from feature group bits
Handovers Event A5 Coverage Handover RSRP
RSRP at serving cell < threshold3 AND (&&) RSRP at target > threshold3a threshold3a
Serving Cell RSRP
threshold3a threshold3
LNCEL; 0..97dB; 1dB; Baseline is -140dBm
threshold3 LNCEL; 0..97dB; 1dB; -
threshold3
threshold3a
Baseline is -140dBm
Neighbor Cell RSRP
-140 dBm
a5TimeToTrigger LNCEL; 0ms (0), 40ms (1), 64ms (2), 80ms (3), 100ms (4), 128ms (5), 160ms (6), 256ms (7), 320ms (8), 480ms (9), 512ms (10), 640ms (11), 1024ms (12), 1280ms (13), 2560ms (14), 5120ms (15); -
time a5TimeToTrigger
a5Report Interval
Measurement Report
a5ReportInterval LNCEL; 120ms, 240ms, 480ms, 640ms, 1024ms, 2048ms, 5120sm, 10240ms, 1min, 6min, 12min, 30min, 60min; -
Measurement Report
eNB
Intra Frequency HO – HO Over S1
Intra-LTE Handover via S1 (LTE54) • S1 based handover is only applicable for inter-eNB handover • LTE inter-eNB handover can be executed without X2 interface usage in following scenarios: – no X2 connectivity existing between Source and Target eNB (or blacklisted by operator) – MME or S-GW change required when routing via Core Network • User data traffic and signaling messages are indirectly send via core nodes (MME and S-GW) • For UE there is no difference whether HO is executed via X2 or S1 interface actLTES1Ho Activate Intra LTE hadover over S1 LNBTS; true(1), false(0); - ; false(0)
prioTopoHO Define priorities between the 3 topology options for intra LTE handover LNBTS; all equal (0), intra eNB HO prior inter eNB HO (1), intra prior X2 prior S1 (2), low prio S1 (3); all equal (0)
S1 S1 SAE-GW
MME
S1 Handover Preparation This is a basic S1 handover utilizing the same MME. 1.The source eNB configures the UE measurement procedures with an RRC RECONFIGURATION 2. UE is triggered to send MEASUREMENT REPORT to the source eNB. It can be event triggered or periodic. 3. Source eNB makes handover decision based on UE report + load and service information. 4. The source eNB issues a S1 HANDOVER REQUIRED to the MME 5. MME identifies Target eNB and sends a S1 HANDOVER REQUEST. 6. The target eNB performs admission control.
UE
Source Target
MME
1. RRC Reconfiguration RRC Reconfiguration Complete 2. Measurement report 3. HO decision 4. HO Required 5. HO request 6. Admission control
SGW
S1 Handover Execution 7. The target eNB configures resources and sends a S1 HO REQUEST ACK. 8. Various GTP signalling is used to update S-GW and create forwarding tunnel. 9. MME forwards the HO information to the source eNB in a S1 HANDOVER COMMAND. 10. Source eNB generates the RRC RECONFIGURATION towards UE informing it to move to the target cell. 11. Source eNB starts forwarding packets to target eNB via S1 (Indirect Forwarding). 12. UE performs the final synchronisation to target eNB and accesses the cell via RACH procedure. DL pre-synchronisation is obtained during cell identification and measurements. 13. Target eNB gives the UL allocation and timing advance information.
UE
Source Target
MME
SGW
7. HO Request Ack 8. GTP Signalling 9. HO Command 10. RRC Reconfiguration 11.Forward packets to target 12. Synchronization 13. UL allocation and timing advance
S1Handover Execution/Completion 14. UE sends RRC RECONFIGURATION COMPLETE to target eNB. 15. The source eNB sends a eNB STATUS TRANSFER carrying PDCP status information towards the MME for relaying to the target eNB. 16. MME uses a MME STATUS TRANSFER to pass PDCP status information to target eNB. 17. The target eNB informs the MME that the handover has been successful using HANDOVER NOTIFICATION. 18. The MME informs the source eNB to release the UE context using a UE CONTEXT RELEASE COMMAND. 19. The source eNB confirms with a UE CONTEXT RELEASE COMPLETE. 20. Following S1 based handover, if the Tracking Area had changed, the UE performs a Tracking Area Update.
UE
Source Target
MME
SGW
14. RRC Reconf. Complete 15. eNB Status Transfer 16. MME Status Transfer 17. Handover Notification 18. UE Context Release Command 19. UE Context Release Complete 20.
Inter Frequency HO
Inter-frequency HO Overview • UE needs to support both bands and inter-frequency HO • Service continuity for LTE deployment in different frequency bands as
actIfHo enables the feature Inter Frequency Handover
LNBTS; disabled (0), well as for LTE deployments within one frequency band but with enabled (1); -; enabled (1) different center frequencies • The UE performs the measurements as configured by eNodeB: eutraCarrierInfo eutraCarrierInfo parameter specifies the inter-frequency band Mid-frequency of neighboring cell used in Measurement Configuration • The trigger for this procedure is: LNHOIF; 0..65535; 1; – better neighbor cell (frequency) coverage (A3, RSRP) – better neighbor cell (frequency) quality (A3, RSRQ) – limited serving cell (frequency) & sufficient neighbor cell (frequency) coverage
(A5)
• Measurement gaps – if needed then gap pattern 0 is used (6ms gap each 40ms)
A3 event based Handover • inter-frequency better coverage/quality based (A3) handover event evaluation Mn – hysA3OffsetRsr(p/q)InterFreq > Ms + a3OffsetRsr(p/q)InterFreq hysA3OffsetRsrp/qInterFreq Hysteresis of HO Margin LNHOIF; 0..15; 0.5; - dB
Signal level
inter-frequency neighbor cell (Mn)
hysA3OffsetRsr(p/q)InterFreq
(RSRP or RSRQ)
measQuantInterFreq def. which quantity to use for event A3 LNHOIF; RSRP, RSRQ; both; RSRP
a3OffsetRsrp/qInterFreq a3OffsetRsr(p/q)InterFreq
Better cell HO margin for RSRP/Q LNHOIF; 0..15; 0.5; - dB serving cell (Ms)
a3TimeToTriggerRsrp/qInterFreq LNHOIF; 0..5120ms; -; not used
time a3TimeToTriggerRsr(p/q)InterFreq
Event A3 condition fullfilled, UE sends measurement report
Measurement Report
Measurement Report
a3ReportIntervalRsr(p/q)InterFreq
a3ReportIntervalRsrp/qInterFreq LNHOIF; 120ms..60 min; -; not used
A5 event based Handover • inter-frequency coverage based (A5) handover event evaluation Ms + hysThreshold3InterFreq < threshold3InterFreq and Mn – hysThreshold3InterFreq > threshold3aInterFreq hysThreshold3InterFreq
Signal level
Hysteresis of HO Margin LNHOIF; 0..15; 0.5; - dB
(RSRP)
hysThreshold3InterFreq
inter-frequency neighbor cell (Mn)
threshold3aInterFreq LNHOIF; 0..97; 1; - dB
threshold3InterFreq LNHOIF; 0..97; 1; - dB hysThreshold3InterFreq serving cell (Ms) time event A5 condition fullfilled UE sends measurement report
a5TimeToTriggerInterFreq
a5TimeToTriggerInterFreq LNHOIF; 0..5120ms; -; -
Measurement Report
Measurement Report
a5ReportIntervalInterFreq LNHOIF; 120ms..60 min; -; -
Nokia - InterInter-frequency Load balancing
Nokia – Load Balancing Feature
Load supervision and CAC calculation Load Measurement
Load supervision and CAC calculation CAC (Composite Available Capacity) Calculation
Parameter Structure Common & Feature dedicated structure
Activation Condition
Load Information Exchange
RSR (Resource Status Report)
RSR (Resource Status Report) RSR Initiate (start)
RSR (Resource Status Report) RSR Initiate (stop)
LTE1841 AMLE Active AMLE state conditions
AMLE Candidate UE Selection
AMLE Measurement
AMLE HO PREPARATION
AMLE HO PREPARATION
Result Detail LTE 1841 AMLE
Mobility Offsets
LTE Mobility Offsets Overview • Target: optimize the intra-LTE mobility (intra & inter-frequency) by applying different offsets for different target cells • Extension for the A3 and A5 reporting events • There are different offsets as follows: • Cell specific and frequency specific • For the serving cell and for the neighbors cells • For the intra-frequency and for the inter-frequency case
• New object introduced: LNREL (Relation of LNCEL to neighbor cell) cellIndOffServ Cell individual offset of own serving cell LNCEL; -24..24dB; ; 0dB
cellIndOffNeigh Cell individual offset of neighbor cells LNREL; -24..24dB; ; 0 dB
offsetFreqIntra Offset for the EUTRA serving frequency LNCEL; -24..24dB; ; 0dB
offsetFreqInter Offset for the EUTRA neighbor frequency LNHOIF; -24..24dB; ; 0 dB
Example: Cell Individual Offsets Impact on Event A5 RSRP serving + cellIndOffServ < threshold3 AND (&&) RSRP target + cellIndOffNeigh > threshold3a
RSRP cellIndOffNeigh
threshold3a
LNREL; -24..24dB; ; 0 dB
Serving Cell RSRP cellIndOffServ LNCEL; -24..24dB; ; 0dB
threshold3
threshold3a
threshold3
Neighbor Cell RSRP
time a5TimeToTrigger
a5Report Interval
Measurement Report
Measurement Report
eNB
-140 dBm
Mobility Offset - Parameter
Category
Parameter
CIO Serving Cell CIO Neighbor Mobility Offset
Huawei Parameter Name
Nokia Parameter Name
[Cell] CellSpecificOffset [EutranIntraFreqNCell] CellIndividualOffset [EutranInterFreqNCell] CellIndividualOffset
[LNCEL] cellIndOffServ [LNREL] cellIndOffNeigh
Offset Intra Feq
[Cell] QoffsetFreq
[LNCEL] offsetFreqIntra
Offset Inter Feq
[EutranInterNFreq] QoffsetFreq
[LNHOIF] offsetFreqInter
EID Parameter Name
ZTE Parameter Name
Default Value
[EUtranCellRelation] cellIndividualOffsetEUtran
[EUtranRelation] cellIndivOffset
0
[EUtranFreqRelation] qOffsetFreq [EUtranCellRelation] qOffsetCellEUtran
[EUtranRelation] qofStCell [EUtranRelation] qofStCell
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