s06 3g rpls2_v2-0 wcdma measurement

8/13/2019 s06 3g Rpls2_v2-0 Wcdma Measurement

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1 NOKIA topic: WCDMA Measurements/ July 2003 /Markus Wimmer

WCDMA Measurementsin the UE


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Part IMeasurement Commands

andMeasurement Reporting


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Measurement Control

Node B

UTRAN

RNC

UESystem Information [BCCH]I am in the

RRC idlemode

Node B

UTRAN

RNC

UESystem Information [BCCH]I am in theCELL_FACH, CELL_PCHor

URA_PCHsub-state

Node B

UTRAN

RNC

UEMeasurement Control [DCCH]I am in theCELL_DCHsub-state

SIB 3 & SIB 11

SIB 4 & SIB 12

(SIB 3 & SIB 11)

SIB 3 [4]: parameters for cell selection and re-selection [in the RRC connected mode]

SIB 11 [12] : measurement control information [in the RRC connected mode]

read and valid: idle, CELL_FACH, CELL_PCH, URA_PCH.

(SIB 11/12 is also valid in the CELL_DCH.)


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Measurement Control and Measurement ReportRRC idle state CELL_FACH

(*) = Measurement control based on(A) = Control information from RRC

message Measurement Control available in UE

CELL_DCH

(*): SIB 11 (*): SIB 12

(*): SIB 11

(A)

(*): SIB 12

(*): MeasurementControl

(A)

(A)

UTRANMeasurement Report Measurement Control


5/565 NOKIA topic: WCDMA Measurements/ July 2003 /Markus Wimmer

Measurement Control and Measurement ReportUE RNC

Measurement Control [RLC-AM, DCCH]

UE RNCMeasurement Control [RLC-AM, DCCH]

[RLC-AM, DCCH] Measurement Control Failure

UE RNC

[RLC-UM/AM, DCCH] Measurement Report

There is a measurement

event!



Measurement Control

UE IEs

Measurement IEs

PhyCH IEs

Measurement Identity

Measurement Command

Measurement Reporting Mode

CHOICE Measurement type

Additional measurements list

DPCH compressed mode

status info

setup/modify/release

RLC AM/UM andperiodical reporting/event triggered

includes non-frequencyrelated cell info

Intra-Frequency Measurements Inter-Frequency Measurements Inter-RAT Measurements UE-Internal Measurements Traffic Volume Measurements Quality Measurements UE Positioning Methods

UE RNCMeasurement Control ( )



Part IITraffic Volume Measurements


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Traffic Volume MeasurementsReporting event:4A: Transport Channel Traffic Volume becomes larger than an absolute threshold4B: Transport Channel Traffic Volume becomes smaller than an absolute threshold

time

TransportChannelTrafficVolume(TCTV)

Threshold

4B

4A

4B 4B

4A 4A


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Nokia Parameters for Traffic Volume Measurements: UL WCEL: TrafVolThresholdULHigh

The parameter defines the threshold of data in RLC buffer of RB in bytes. This threshold triggers the uplink traffic volume

measurement report when the UE is in a Cell_DCH state and the initial bit rate DCH is allocated for the radio bearer.

8, 16, 32, 64, 128, 256, 512, 1024, 2048, 3072, 4096 bytes; default: 1024 bytes WCEL: TrafVolThresholdULLow

This parameter defines, in bytes, the threshold of data in the RLC buffers of SRB0, SRB1, SRB2, SRB3, SRB4 and all NRT RBs that

triggers the uplink traffic volume measurement report, when the UE is in Cell_FACH state. Otherwise, UE sends data on RACH.

8, 16, 32, 64, 128, 256, 512, 1024 bytes; default: 128 bytes

RNC: TrafVolTimeToTriggerULThis parameter defines, in ms, the period of time between the timing of event detection and the timing of sending a traffic volume

measurement report.

0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560, 5000 ms; default: 0 ms.

RNC: TrafVolPendingTimeULThis parameter indicates the period of time, in seconds, during which it is forbidden to send any new traffic volume measurement

reports with the same measurement ID, even if the triggering condition is fulfilled again.

250, 500, 1000, 2000, 4000, 8000, 16000 ms; default: 4000 ms

All parameters are sent to the UE using the RRC: MEASUREMENT CONTROL message.


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Nokia Parameters for Traffic Volume Measurements: DLThe DL load is directly monitored at the RNC, which can react accordingly. Following Parameters can be set:

RNC: TrafVolThresholdDLHighDownlink traffic volume measurement high threshold

0, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 3072, 4096 bytes; default: 1024 bytes RNC: TrafVolTimeToTriggerDL

This parameter defines, in ms, the period of time between the timing of event detection and the timing of sending a downlink

capacity request.

0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560, 5000 ms; default: 0 ms

RNC: TrafVolThresholdDLLowDownlink traffic volume measurement low threshold

0, 8, 16, 32, 64, 128, 256, 512, 1024 bytes; default: 128 bytes RNC: TrafVolPendingTimeDL

Downlink traffic volume measurement pending time after trigger

250, 500, 1000, 2000, 4000, 8000, 16000 ms; default: 4000 ms

WCEL: NASsignVolThrDLDownlink NAS signalling volume threshold

WCEL: NASsignVolThrDULUplink NAS signalling volume threshold

RNC


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Part IIIUE Internal Measurements


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UE Internal Measurements Reporting Events

timetime to trigger,e.g. 1280 ms

time to trigger

UTPw

6A: The UE Tx power becomes larger than an absolute threshold6B: The UE Tx power becomes less than an absolute threshold6D: The UE Tx power reaches its maximum value

UE Transmitted Power TxThreshold

6B6A

6Dmin(UEtxPowerMaxDPCH, Pmax)


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UE Internal Measurements Reporting Events6F: The UE Rx-Tx time difference for a RL included in the active set becomes larger than an absolute

threshold

6G: The UE Rx-Tx time difference for a RL included in the active set becomes less than an absolutethreshold

timeT0

UL DPCHtime

time

6F 6G


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Nokia Parameters for UE Internal Measurements Reporting WCEL: UEtxPowerMaxDPCH

This parameter defines the maximum transmission power level a UE can use on DPCH. It is signalled to UE in the

Maximum allowed UL TX power IE of a proper RRC message, when a radio link is set up.

[-50 ... 33] dBm, step 1 dBm; default: 24 dBm

RNC: LowerRxTxTimeDiffLower Rx-Tx TD Threshold defines the absolute threshold which is used by the UE to trigger the reporting event 6Gdue to UE Rx-Tx time difference.

[768 ... 896] chips, step 1 chips; default: 874 chips

RNC: UpperRxTxTimeDiffThis parameter defines the absolute threshold which is used by the UE to trigger the reporting event 6Fdue to UERx-Tx time difference.

[1152 ... 1280] chips, step 1 chips; default: 1174 chips

etc.


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Part IVQuality Reporting Events


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Quality Reporting Event

TgSR Max SIR target

Min SIR target

Actual SIR target

1st Quality deterioration report from PC to HC inside RNC2nd Quality deterioration report (if the condition is stillsatisfied the message is periodically repeated)

ULQualDetRepThresholddefault 5s time

SIR SIR

Report 1

Total CRC Total CRC Total CRC

Pending after triggerReport 2 Report 3

RNC

DL power control

DL

DPCH

power on

maximum

value


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RNC: EnableULQualDetRepThis parameter enables or disables the quality deterioration report from ULOLPC controller procedure. When enabled, it may

initiate a bearer reconfiguration procedure; or if the serving cell (or cells participating in soft handover) has neighbouring cells in

another carrier frequency or system, the RNC may tell the UE to start inter-frequency/system measurements when it receives the

quality deterioration report from the UL outer loop PC controller.

0 (No), 1 (Yes); default: 0.

RNC: ULQualDetRepThresholdIf the uplink SIR target has reached the maximum, and the uplink SIR Target modification commands, received by the outer loop

PC controller from the current active PC Entity during ULQualDetRepThreshold seconds, are all greater than zero, then the

uplink outer loop PC controller sends a quality deterioration report to HC. The quality deterioration message to the HC isperiodically repeated, with ULQualDetRepTreshold defining the period, until either the quality target is resumed, meaning that the

condition specified above is no longer met, or further actions are taken by HC.

[0.5 ... 5] s, step 0.5 s; default: 5 seconds.

Nokia Parameter for Quality Reporting Event


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Part VIntra-Frequency Measurements


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Cells for Measurement and MonitoringA: active set cellsB: monitored set cellsC: detected set cells

C

C

C

Reporting only appli-cable to intra-frequen-cy measurements made by UEsin CELL_DCH state.

FDD f1 B

B

B

BB

B

B

B

B

B

FDD f2

GSM

AA


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Intra-frequency Reporting Events

time

measurement quantity:P-CPICH Ec/No / P-CPICH RSCP/ Pathloss

time to trigger time to trigger

Cell 1Cell 2

Cell 3reportingrangeconstant

1B forcell 1

1A forcell 3

Reporting event:1A: A P-CPICH enters reporting range1B: A P-CPICH leaves reporting range

egPCCHEN


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time1C forcell 4

Reporting event: 1C: A non-active P-CPICH becomes better than an active P-CPICH1D: Change of best cell

Cell 1 Cell 2

Cell 3

Cell 4

1D

1C forcell 4

Active Set cells:cell 1, cell 2,

cell 3

egPCCHEN


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1E forcell 3

Reporting event: 1E: A P-CPICH becomes better than an absolute threshold1F: A P-CPICH becomes worse than an absolute threshold

1F forcell 1

time

Cell 1 Cell 2

Cell 3absolute

threshold

egPCCHEN


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Nokia Parameters for Intra-Frequency MeasurementsThere is a huge number of intra-frequency measurement parameters. Please refer to the WCDMA Parameter Dictionary.

See Measurement Control Parameter Set (FMCS object) which controls the intra-frequency measurements radio bearer, such as:

1A paramters:ActiveSetWeightingCoefficient, AdditionReportingInterval, AdditionWindow, AdditionTime, MaxActiveSetSize, etc.

1B parameters:ActiveSetWeightingCoefficient, DropTime, DropWindow, etc.

1C parameter:MaxActiveSetSize, ReplacementReportingInterval, ReplacementTime, ReplacementWindow, etc.

1E parameter:HHoEcNoCancel, HHoEcNoCancelTime, HHoRscpCancel, HHoRscpCancelTime, etc.

1F parameter:HHoEcNoCancel, HHoEcNoTimeHysteresis, HHoRscpCancel, HHoRscpThreshold, HHoRscpTimeHysteresis, etc.


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Neighbourhood List Combination for Intra-frequency HOs

Cell 5 Cell 6 Cell 7 Cell 8



Cell 3Cell11

Neighbour cells which are commonto Cell 6 and Cell 7 Cell 4

Cell 8Cell 12Cell 6

Neighbour cells defined only forCell 7

Cell 2Cell7

Cell 10Cell 5

Neighbour cells defined only forCell 6

Two Cells in theActive Set


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Neighbourhood List Combination for Intra-frequency HOsCell 2Cell 5Cell 7Cell 9Cell 11Cell 15Cell 48Cell 4Cell 41Cell 6

Cell 43

Cell 15Cell 21Cell 2Cell 7Cell 37Cell 51Cell 49Cell 9Cell 10Cell 56

Cell 25

Cell 1Cell 2Cell 3Cell 7Cell 11Cell 50Cell 9Cell 13Cell 10Cell 22

Cell 33

Neighbour Cells ListsStep 1

Three Cells in theActive Set

Cell2Cell 7Cell 9

Comm on to 3 Neighbour Lists

Step 2

Cell 11Cell 15Cell 10Cell 37Cell 41Cell 49

Cell 22

Max 32 Cells

Neighbour Cells defined for only 1Neighbour List: random selectionStep 4

Common to 2Neighbour Lists

Step 3


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measurement quantity


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Inter-frequency Reporting Events q yP-CPICH Ec/No / P-CPICH RSCP/ PathlossReporting event: 2C: The estimated quality of a non-used frequency is abovea certain threshold

Qnonused

time

+H2b/2

-H2b/2Tnon used 2b

2C report

time totrigger

UE adds non-used frequency toTRIGGERED_2B_EVENT

UE removes non-used frequency fromTRIGGERED_2B_EVENT

time totrigger

2C report

Reporting event: 2F: The estimated quality of a used frequency is abovea certain threshold(the same concept is applied as in 2C)


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Inter-frequency Reporting EventsReporting event: 2E: The estimated quality of a non-used frequency is belowa certain threshold

Qnonused

time

+H2e/2

-H2e/2Tnon used 2e

2E report

time totrigger

UE adds non-used frequency toTRIGGERED_2E_EVENT

UE removes non-used frequency fromTRIGGERED_2E_EVENT

time totrigger

2E report

Reporting event: 2D: The estimated quality of a used frequency is belowa certain threshold(the same concept is applied as in 2E)


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TRIGGERED_2B_EVENTfor non-used frequency

Inter-frequency Reporting EventsReporting event: 2B: The estimated quality of the currently used frequency isbelow a certain threshold and the estimated quality of a non-used frequency isabove a certain threshold.

Qnonused

time

Qused

time

2B report non-used frequency removed fromTRIGGERED_2B_EVENT

Reporting event: 2A: Change of best frequency

time

Q+H2a/2

time totrigger

2A report


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Nokia Parameters for Inter-Frequency MeasurementsThere is a huge number of inter-frequency measurement parameters. Please refer to the WCDMA Parameter Dictionary.

See Measurement Control Parameter Set (FMCI object) which controls the inter-frequency measurements radio bearer, such as:

FMCI: FMCIId WCEL: NrtFmciIdentifier WCEL: RtFmciIdentifier RNC: etc.

For more details, please refer to the course 3G RPLS3


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Part VIIInter-RAT Measurements

measurement quantity


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Inter-RAT Reporting EventsP-CPICH Ec/No / P-CPICH RSCP/ GSM RSSI

Reporting event: 3C: The estimated quality of other system is abovea certain threshold

MOther Rat+CIOOther Rat

time

+H3c/2

-H3c/2TOther Rat

3C report

time totrigger

UE adds non-used frequency toTRIGGERED_3C_EVENT

UE removes non-used frequency fromTRIGGERED_3C_EVENT

time totrigger

3C report

Reporting event: 2B: The estimated quality of other system is belowa certain threshold(the same concept is applied as in 2D and 2E)


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TRIGGERED_3A_EVENT

for non-used frequency

Inter-RAT Reporting EventsReporting event: 3A: The estimated quality of the currently used UTRANfrequency is below a certain threshold and the estimated quality of the othersystem is above a certain threshold.

MOther Rat+CIOOther Rat

time

Qused

time

3A report TRIGGERED_3A_EVENT gets cleared.

Reporting event: 3D: Change of best cell in other system

time

Cell 1

Cell 23D

Meumnqny

+H3d/2

time totrigger


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Nokia Parameters for Inter-RAT MeasurementsThere is a huge number of intra-RAT measurement parameters. Please refer to the WCDMA Parameter Dictionary.

See Measurement Control Parameter Set (FMCG object) which controls the inter-RAT measurements radio bearer, such as:

FMCG: FMCGId WCEL: NrtFmcgIdentifier WCEL: RtFmcgIdentifier RNC: etc.


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Part VIIICompressed Mode


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Compressed Mode: Transmission Gap Methods


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radio frame radio frame

TGL

3, 4, 5, 7, 10, or 14timeslots

radio frame radio frame

TGL

Single-frame method

Double-frame method

transmitted TSs: 8

Compressed Mode: Frame Structure Types


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TPCTFCI

Data2

Data1

Pilot

TPCTFCI

Data2

Data1

Pilot

TPC

Pilot

Transmission Gap Length

TPCTFCI

Data2

Data1

Pilot

TPCTFCI

Data2

Data1

PilotilotType A

Type B

to maximise

transmission length

to optimise

power control UPLINK: only idle timeslots!

DOWNLINK

Compressed Mode (Slotted Mode)


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TGPattern 1

TGPattern 2

TGPattern 1

TGPattern 2

TGPattern 2

TG Transmission Gap TGL Transmission Gap LengthTGPL Transmission Gap Pattern Length TGD Transmission Gap start DistanceTGSN Transmission Gap Starting slot Number TGPRC TG Pattern Repeat Count

TG Pattern 1 TG Pattern 2

TGPL1 TGPL2

TGSNTGL1 TGL2GL1GL2

TGD TGD

#1 #2 #3 #4 #TGPRCTGCNF transmission gap pattern sequence

Compressed Mode Parameters


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Transmission Gap Pattern Sequence Configuration Parameters

TGMPTDD measurementFDD measurementGSM carrier RSSI measurementGSM Initial BSIC identificationGSM BSIC reconfirmationMulti-carrier measurement

options TGPRC 1..511, infinityTGSN 0..14 TS numberTGL1 0..14 timeslotsTGL2 0..14 (default: TGL1)

TGD 15..269, undefined (= 1 TG only)

TGMP Transmission Gap pattern sequence Measurement PurposeTGL Transmission Gap Length TGD Transmission Gap start DistanceTGSN Transmission Gap Starting slot Number RPP Recovery Period PowerITP Initial Transmit Power

CM methodPuncturingSF/2higher layer scheduling

TGPL1 1..144 radio framesTGPL2 0..144 (default: TPGL2)RPP mode 0 / mode 1IPT mode 0 / mode 1

Please note, that the table is not complete

Compressed Mode: Impact on Cell Capacity (Downlink)


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Assumption Effect to the capacity

Required Eb/No is 1.5 dBhigher during compressed frames 1.5 dB = 41% more interference

Every 3rd frame is compressed 41% /3 = 14% more interference

10% of the users aremeasured at the same time 14% /10 = 1.4% more interference

Capacity degradation < 2%DL DPCHe.g. GSM C0

Compressed Mode: Impact on Cell Coverage (Uplink)


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Assumption Effect to the coverageof real time servicesRequired Eb/No is 1.5 dB

higher during compressed frames 1.5 dB reduced coverage

7-slot gap is used10*log10(15/8)

= 2.7 dB reduced coverage

Every 2nd frame is compressed with

20 ms interleaving (speech)4.2 dB / 2 = 2.1 dB reduced coverage

UL DPCHe.g. GSM C0

Signalling leakage?

Total coverage

reduction 2.1 dB

CM

UE max. power

Frame error if

mobile hits

its maximum power

Nokia Parameters for the Compressed Mode


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Compressed Mode AvailabilityFollowing parameter is used to define on system level, whether the compressed mode is used:

RNC: CMmasterSwitch (default value is 0 (used), 1 stands for not used)Puncturing (only in DL)In RAN 1.5puncturing is possible only with fixed starting positions of the TrCHs in the radio frame, possible for AMR speech services only. Please

remember, that more Tx power is needed if same QoS requirements has to be satisfied; it is only done, when all DCHs have enough free

puncturing capacity

RNC: DLPuncturingLimitThe parameter defines the maximum puncturing ratio allowed to be used in DL DCH's. Value 1.0 means that no puncturing is used. Range: 0.4..1,

step size 0.04.

Default value is 0.68

Splitting Spreading Factor (UL and DL)It doubles temporarily the physical channel data rate, possible for all services, needs 3 dB more UE power due to split spreading ratio, and is done,

if if new channelisation code is available from code tree in DL.

WCEL: AltScramblingCodeCMThis parameter defines whether or not the alternative scrambling code is used in case of compressed mode method halving the spreading code.

Default value is 0 (used). 1 stands for not used.

Nokia Parameters for the Compressed Mode with AMR


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Selection of AMR mode:RNP parameters MinDLAMRModeCM and LowerULAMRModeCM defines minimum allowed AMR mode and lower AMR mode in

compressed mode correspondingly in downlink and uplink.

In downlink it has to be tested which is biggest lower AMR mode which allows gap with the aid of puncturing. Double frame (4 slotsout of 15) is requested. This new lower AMR mode candidate has to belong to the set of modes allowed by both Iu interface and

MinDLAMRModeCM parameter. If gap can not be obtained with allowed AMR mode and puncturing, SF/2 is used despite of

power levels.

In uplink compressed mode method is SF/2 and lower AMR mode adding to AMR TFSs. RNP parameter LowerULAMRModeCM

defines directly used lower AMR mode. This is done in case of shortage of UE Power.

SF/2 as such allows gap, but lower AMR mode is added to reduce power increase. UE can automatically use lower AMR mode if

UE Tx power is approaching its maximum.

RNC: MinDLAMRModeCM RNC: LowerULAMRModeCM

For the two parameters, following AMR values are allowed (AMR data rate): 4.75, 5.15, 5.9, 6.7, 7.4, 7.95, 10.2, and 12.2

kbps. Default value is 7.4 kbps.


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Whether a UE can be switched on compressed mode in downlink shall be checked in the following way:

If Ptx_Total is below Ptx_Target and number of UEs in CM is less than MaxNumbUECMcoverHOparameter indicates, a UE can be

switched on compressed mode.

If Ptx_Total is between Ptx_Target and Ptx_Target + Ptx_Offset and MaxNumbUECMcoverHO parameter allows, during the RRI(radio resources indication) interval one more UE can be switched on compressed mode.

If Ptx_Total is above Ptx_Target + Ptx_Offset, no more UE can be switched on compressed mode.

Uplink is done analogously.

If a UE is to be switched on compressed mode both in uplink and downlink, these checks have to be done and passed both uplink

and downlink. If uplink or downlink compressed mode is not needed, corresponding checking shall not be done, because power

budget of that direction is not affected.

WCEL: MaxNumbUECMcoverHOThis parameter sets the maximum number of UEs in compressed mode simultaneously in one cell due to coverage/quality based

HO measurement reason.

Range: 0..255. Default value: 16.



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PtxTarget/PrxTarget

DL/UL

transmission power

Load

PtxOffset/PrxOffset

New UEs can be switched on CM here:Pxx_Total < Pxx_Target &

# of UEs in CM < MaxNumbUECMcoverHO

One new UE in CM can be allowedif the limit is not reached

No new UE can be in CM here



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WCEL: PtxTargetThis is the target value for total transmitted power in a cell. A real-time Radio Access Bearer is not admitted, if the estimated non-

controllable power exceeds this threshold. Default value should be 3dB below the Cell maximum transmission power. Range: -10

... 50 dBm, step size: 0.1 dBm.

WCEL: PtxOffsetThe target value of the total transmitted power (PtxTarget) can be exceeded by the value of this parameter before the cell is

considered to be overloaded in DL RAB is not admitted, if the total transmitted power exceeds the sum of the values of this

parameter and the PtxTarget. PtxOffset is used to calculate the first downlink overload threshold for BTS and RNC: PtxTargetBTS

= PtxTarget+PrxOffset. The range is 0..6 dB with a step size of 0.1 dB. Default value is 1 dB.

WCEL: PrxTargetThe target for received total wideband interference power in a cell. It gives an upper threshold for the noise rise: the ratio of the

total received uplink power to system noise. Range: 0 ... 30 dB, step size: 0.1 dB. Default value is 4 dB.

WCEL: PrxOffsetThe target value of the total received power (PrxTarget) can be exceeded by the value of this parameter before the cell is

considered to be overloaded in uplink. Range: 0..6 dB, step size: 0.1 dB; default value is 1 dB.


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Part IXExcursion: Handover Decision

Inter-frequency and Inter-RAT System Handover - Triggers


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1. DL DPCH approach itsmaximum allowed power

2. Quality deterioration reportfrom UL outer loop PC

4. UE Tx power approaches itsmaximum allowed power

5 . Low measured absoluteCPICH RSCP

3. Low measuredabsolute CPICH Ec/No

HO trigger

6 . Others (Not implemented in RAN 1.5):e.g. Traffic reason IS-HO,

forced IS-HO handover etc

RRC: Measurement report message if cause 3, 4 or 5)UE RNC

Example: Maximum DL Transmission Power as HO Trigger


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Node B RNC

DCH Data Frame

Iub

UE

PO1TPCPilot

bitsTFCIData 2 bitsData 1 bits

PO3PO2DL_CODE_PWR PowerOffsetDLdpcchPilotCPICH_POWER + MAX_DL_DPCH_TXPWR+ DL_DPCH_TXPWR_THRESHOLD

Max BTS Tx Power (e.g. 43 dBm)

ServingWCDMA cell

time

Its time to triggerHO measurements

in the UE

Dedicated Measurement Report

(e.g. Transmitted Code Power Value)

Inter-Frequency Handover possible?


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best active set

cell

best inter-frequencycell

HO?

a) AVE_EcNo_NCELL (n) > InterFreqNcellMinEcNo(n) b) AVE_EcNo_NCELL (n) > AVE_CPICH_EcNo + InterFreqNcellEcNoMargin(n)

Quality Criteria

InterFreqNcellMinEcNo(n)

A_N_

n

AVE_CPICH_EcNo

AVE_EcNo_NCELL (n) > AVE_CPICH_EcNo

InterFreqNcellEcNoMargin(n)

AVE_EcNo_NCELL (n)

Inter-Frequency Handover possible?


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AVE_RSCP_NCELL (n)> InterFreqNcellMinRSCP(n)+ max(0, InterFreqNcellTxPwrDPCH(n) - P_MAX)

RSCP Criterion

CPICH_POWER - AVE_CPICH_RSCP> CPICH_POWER_NCELL (n) - AVE_RSCP_NCELL (n)+ InterFreqNcellPlossMargin(n)

InterFreqNcellMinRSCP(n)

max(0, InterFreqNcellTxPwrDPCH(n) - P_MAX)

Pathloss Criterionbest inter-frequency

cellbest active set

cell

InterFreqNcellPlossMargin(n)

Inter-frequency Handover Procedure


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Handover Triggering Thresholds

set in RNC

Event Triggered Coverage/Capacity

based HO fulfilled in RNC

RNC commands selected UE(s) to

start IF measurements periodically

Measurements are done in

Compressed Mode (CM)

UE reports the results from the best

IF neighbours back to RNC

RNC makes HO decision and

commands UE to target cell

Different decision methods for each

reason

Coverage/capacity HO reasons

About 25 new HO parameters compared

to soft handover procedure

Reporting cells are active set cells

(max 3) + max 6 inter-frequency neighbours

Total 48 inter-frequency neighbours

(max. 32 on the same frequency)

could be measured

RAT-Frequency Handover possible?


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GSMncellRxLevMinHO(n)

max(0, GSMncellTxPwrMaxTCH(n) - P_max)

AVE_RXLEV_NCell(n) > GSMncellRxLevMinHO(n) + max(0, GSMncellTxPwrMaxTCH(n) - P_max)GSM cell


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s06 3g rpls2_v2-0 wcdma measurement

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