ZTE UMTS Handover

8/12/2019 ZTE UMTS Handover

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ZTE UMTS Handover


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Intra-Frequency Handover

Inter-frequency Handover

Inter-RAT Handover

HSDPA-related Handover

HSUPA-related Handover


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Intra-Frequency HandoverPolicy

Introduction

Intra-frequency handover is the handover between cells in one

frequency of UTRAN. The intra-frequency handover can be triggered by

Ec/N0 or RSCP measurement.

F1

cell Intra-frequency mobility


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Category Soft Handover and Softer Handover

Intra-Frequency Hard Handover

Cell 1 Cell 2HO

RL 1RL 2

Cell 1 Cell 2HO

RL 1RL 2


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Measurement objectIncluding active set measurement, monitored set measurement

and detected set measurement.

Active set: the set of cells retaining radio links with UE

Monitored set: the set of cells retaining no radio link with UE but

requiring measurement by sending the intra-frequency measurement

control message to UE.

Detected set : the set of intra-frequency cells except cells in the

active set and monitored set


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Measurement report method Event reporting : UE judges whether intra-frequency events are

satisfied based on the quality measurement results of cell

Periodical reporting: UE periodically reports the quality

measurement result of intra-frequency cell PCPICH to the RNC and

the RNC then judges whether intra-frequency events are satisfied

based on the measurement result.


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Events

A series of intra-frequency measurement events are defined in 3GPP as the judgment and

trigger criteria for intra-frequency handover. Measurement quantity: PCPICH Ec/N0 or

RSCP

Event 1A:A Primary CPICH enters the Reporting Range. It can be used for adding cell to

the active set.

Event 1B:A Primary CPICH leaves the Reporting Range. It can be used for deleting cell

from the active set.

/2)H(RLogM10W)(1MLog10WCIOLogM10 1a1aBest

N

1i

iNewNew

A

/2)H(RLogM10W)(1MLog10WCIOLogM10 1b1bBestN

1i

iOldOld

A


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Events

Event 1C:A Non-active Primary CPICH becomes better than an active Primary CPICH. It

can be used for replacing the cell with bad quality in the active set.

Event 1D: The best cell changes. It can be used for soft/softer handover, intra-frequency

hard handover and inter-frequency load balance.

/2HCIOLogM10CIOLogM10 1cInASInASNewNew

/2HCIOLogM10CIOLogM10 1dBestBestNotBestNotBest


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Neighboring priority

In 3GPP, the number of intra-frequency neighboring cells is limited in 32.

Source Cell

Priority 0

Priority 1

Priority 2

Cell priority configuration


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Detected set Handover

Condition: detected set handover is enabled, and the number of

adjacent cells are exceeding 32

Action: RNC informs UE to report the measurement results of

detected set in the measurement control.

Detected Set Tracing

Purpose: The detected set tracing is used in network planning and

optimization to judge whether there is any adjacent cell not

configured based on the statistical report.


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Intra-Frequency Handoverrelated parameters

Weight for Event 1A/1B

3GPP name W

3GPP reference TS 25.331: RRC Protocol Specification

Abbreviated

nameW[MAX_INTRA_MEAS_EVENT]

Description

This parameter is used for quality judgment of event 1a and 1bwhich indicates the weight of the best cell in

the quality judgment and is related to the measurement quantity and the event type.

MAX_INTRA_MEAS_EVENT indicates the maximum number of intra-frequency measurement event, which

is 7.

Description

Parameter name Weight for Event 1A/1B

Range and step (0.0..2.0) step 0.1

Default value

Period Report Parameters for CPICH Ec/No: -

UE Event Report Parameters for CPICH Ec/No: [0.0 0.0 0.0 0.0 0.0 0.0 0.0]Period Report Parameters for CPICH RSCP : -

UE Event Report Parameters for CPICH RSCP: [0.0 0.0 0.0 0.0 0.0 0.0 0.0]

Detected Set Measurement Parameters for CPICH Ec/No: [0.0]

Detected Set Measurement Parameters for CPICH RSCP: [0.0]

Working scope UTRAN Cell and Basic Priority Related

Related feature Handover Control


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Hysteresis

3GPP name Hysteresis


Abbreviated

nameHysteresis[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the hysteresis used when judging whether to trigger the event. This parameter

makes it different between the status to trigger an event and the status to leave the event, so as to avoid the

trigger status change due to very small change.

The larger the value is, the larger the difference between the status to trigger the event and the status to

leave the event will be.

This parameter is related to the measurement quantity and the event type.

Different events are configured separately and can be configured with different hysteresis

MAX_INTRA_MEAS_EVENT indicates the maximum number of intra-frequency measurement event, which

is 7

Description

Parameter name Hysteresis

Range and step (0..7.5)dB step 0.5dB

Default value

Period Report Parameters for CPICH Ec/No: -

UE Event Report Parameters for CPICH Ec/No: [0,0,4,4,2,2,4]

Period Report Parameters for CPICH RSCP : -

UE Event Report Parameters for CPICH RSCP: [4,4,6,6,4,4,6]

Detected Set Measurement Parameters for CPICH Ec/No: [2]

Detected Set Measurement Parameters for CPICH RSCP: [6]




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Reporting Deactivation Threshold for Event 1A

3GPP name Reporting deactivation threshold


Abbreviated

nameRptDeactThr[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the maximum number of the cells that can exist in the active set. When the UEdetects that one cell in the monitoring set satisfies the threshold of event 1a, it first judges whether thenumber of the cells in the current active set is not greater than the value indicated by this parameter. If so,

triggers event 1a. If not, does not trigger event 1a.

Description

Parameter name Reporting Deactivation Threshold for Event 1A

Range and step (0, 1, 2, 3, 4, 5, 6, 7)

Default value

Only configured for event 1a.

Period Report Parameters for CPICH Ec/No: -UE Event Report Parameters for CPICH Ec/No: [2, -, -, -, -, -, -]Period Report Parameters for CPICH RSCP : -UE Event Report Parameters for CPICH RSCP: [2, -, -, -, -, -, -]Detected Set Measurement Parameters for CPICH Ec/No: [6]Detected Set Measurement Parameters for CPICH RSCP: [6




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Replacement Activation Threshold for Event 1C and 1J

3GPP name Replacement activation threshold


Abbreviated

nameRplcActThr[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the minimum number of the cell that can exist in the DCH active set when triggeringevent 1c or in the E-DCH active set when triggering event 1j. When UE detects that one cell satisf ies thetrigger threshold of event 1c/1j, it first judges whether the number of the cells in the current active set issmaller than the value indicated by this parameter. If so, do not trigger event 1c/1j. If the value is 0, the

parameter is invalid.MAX_INTRA_MEAS_EVENT indicates the maximum number of intra-frequency measurement event, whichis 7

Description

Parameter name Replacement Activation Threshold for Event 1C and 1J

Range and step (0, 1, 2, 3, 4, 5, 6, 7)

Default value

Only configured for event 1c and 1j.Period Report Parameters for CPICH Ec/No: -UE Event Report Parameters for CPICH Ec/No: [-, -, 3, -, -, -, 3]Period Report Parameters for CPICH RSCP : -UE Event Report Parameters for CPICH RSCP: [-, -, 3, -, -, -, 3]Detected Set Measurement Parameters for CPICH Ec/No: [-]Detected Set Measurement Parameters for CPICH RSCP: [-]




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Time to Trigger

3GPP name Time to trigger


Abbreviated

nameTrigTime[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the time difference between having detected the event generation and reporting theevent. Only when the event generation is detected and still meets all requirements of event triggering afterTime to trigger, the event can be triggered and reported. The larger the value is, the stricter the judgment isfor the event to be triggered. The parameter should be set according to the actual requirements. Sometimes,

if it is set too large, the quality of calls may decrease.MAX_INTRA_MEAS_EVENT indicates the maximum number of intra-frequency measurement event, whichis 7.

Description

Parameter name Time to Trigger

Range and step (0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560, 5000)ms

Default value

Period Report Parameters for CPICH Ec/No: -UE Event Report Parameters for CPICH Ec/No: [200,640,320,320,200,200, 320]msPeriod Report Parameters for CPICH RSCP : -UE Event Report Parameters for CPICH RSCP: [200,200,200, 200,200,200,200]msDetected Set Measurement Parameters for CPICH Ec/No: [200]ms

Detected Set Measurement Parameters for CPICH RSCP: [200]ms




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Amount of Reporting for Event 1A/1B/1C/1J

3GPP nameAmount of reporting


Abbreviated

nameTS 25.331: RRC Protocol Specification

Description

This parameter indicates the maximum times to report the measurement report after triggering event1a/1b/1c/1j (because they are reported periodically). After event 1a/1b/1c/1j is triggered, the UE reports themeasurement results according to the report intervals. If the times of event reports exceeds the valueindicated by this parameter, UE stops reporting the measurement results. If the result of judgment indicates

that event 1a/1b/1c/1j finishes, stop reporting the measurement results even the times of report do not reachthe value indicated by this parameter. MAX_INTRA_MEAS_EVENT indicates the maximum number of intra-frequency measurement event, which is 7.

Description

Parameter name Amount of Reporting for Event 1A/1B/1C/1J

Range and step (1, 2, 4, 8, 16, 32, 64, Inf inity)

Default value

Only configured for event 1a, 1c, 1j.Period Report Parameters for CPICH Ec/No: -UE Event Report Parameters for CPICH Ec/No: [4, -, 4, -, -, -, 4]Period Report Parameters for CPICH RSCP : -UE Event Report Parameters for CPICH RSCP: [4, -, 4, -, -, -, 4]Detected Set Measurement Parameters for CPICH Ec/No: [1]Detected Set Measurement Parameters for CPICH RSCP: [1]




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Reporting Interval for Event 1A/1B /1C/1J

3GPP nameReporting interval


Abbreviated

nameEvtRptInterval[MAX_INTRA_MEAS_EVENT]

Description

This parameter indicates the time interval to report the measurement results after triggering event 1a/1b/1c/1j(because they are reported periodically). After event 1a/1b/1c/1j is triggered, the UE reports themeasurement results according to the report intervals. If the times of event reports exceeds Amount ofReporting for Event 1A/1B/1C/1J, UE stops reporting the measurement results. If the result of judgment

indicates that event 1a/1b/1c/1j finishes, stop reporting the measurement results even the times of report donot reach Amount of Reporting for Event 1A/1B/1C/1J. MAX_INTRA_MEAS_EVENT indicates the maximumnumber of intra-frequency measurement event, which is 7.

Description

Parameter name Reporting Interval for Event 1A/1B/1C/1J

Range and step (0, 250, 500, 1000, 2000, 4000, 8000, 16000)ms

Default value

Only configured for event 1a, 1c, 1j.Period Report Parameters for CPICH Ec/No: -UE Event Report Parameters for CPICH Ec/No: [2000, -, 2000, -, -, -, 2000]msPeriod Report Parameters for CPICH RSCP : -UE Event Report Parameters for CPICH RSCP: [2000, -, 2000, -, -, -, 2000]msDetected Set Measurement Parameters for CPICH Ec/No: [2000]msDetected Set Measurement Parameters for CPICH RSCP: [2000]ms




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Inter-RAT Handover




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Inter-Frequency HandoverPolicy

Introduction

Inter-frequency handover is a feature that a UE in CELL_DCH hands

over from a cell on a frequency of UTRAN to another cell on another

frequency.

F1

cellIntra-frequency mobility

F2

Inter-frequency mobility


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Triggers

The factors triggering inter-frequency hard handover include radio quality, load,

and UE speed.

Radio quality: the quality of the frequency where UE is currently located

becoming worse and UE handovers to another frequency based on measurement

results. The measurement categories,

PCPICH(RSCP/EcNo) quality of cell in current serving carrier frequency.

Uplink Block Error Rate (BLER) of the Dedicated Channel (DCH).

Uplink transmit power of DCH.

Downlink transmit power of DCH.

Load: the cell load of used frequency is too heavy, the system handovers some

UEs of this cell to an adjacent cell on another frequency

UE speed: It is mainly used on the HCS network.

Priority: Load > radio quality > UE speed


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Measurement and Events

A series of inter-frequency measurement events are defined in 3GPP as the

judgment and trigger criteria for inter-frequency handover. Measurement

quantity: PCPICH Ec/N0 or RSCP

Event 2A: The best carrier frequency changes.

Event 2B: The quality of working carrier frequency is lower than a threshold

and that of non-working carrier frequency is higher than a threshold.

/2HQQ 2aBestNotBest

/2HTQ 2b2busedNonusedNon

/2HTQ 2b2bUsedUsed


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Measurement and Events

Event 2C: The quality of non-working carrier frequency is higher than a threshold.

Event 2D:The quality of working carrier frequency is lower than a threshold.

Event 2E:The quality of non-working carrier frequency is lower than a threshold.

Event 2F:The quality of working carrier frequency is higher than a threshold.

/2HTQ 2c2cusedNonusedNon

/2HTQ2d2dUsedUsed

/2HTQ2e2eusedNonusedNon

/2HTQ2f2fUsedUsed


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Inter-Frequency Handoverrelated parameters Absolute Threshold of the Quality of the Currently Used Frequency for

2B/2D/2F

3GPP name Threshold used frequency


Abbreviated

nameThreshUsedFreq[MAX_INTER_MEAS_EVENT]

DescriptionThis parameter indicates the absolute threshold that is required to be configured for event 2b/2d/2f(used when judging the quality of the currently used frequency.

MAX_INTEREAS_EVENT is the maximum number of inter-frequecy measument event which is 6.

Description

Parameter name Absolute Threshold of the Quality of the Currently Used Frequency for 2B/2D/2F

Range and stepCPICH RSCP: (-115..-25 )dBm step 1dBmCPICH Ec/No: (-24..0) dB step 1dB

Default value

UE Period Report Parameters for CPICH Ec/No: -UE Inter-frequency Event Report Parameters for CPICH Ec/No: [-24,-13, -24,-13,-24,-5]dBUE Period Report Parameters for CPICH RSCP: -UE Inter-frequency Event Report Parameters for CPICH RSCP: [-115,-95, -115,-95,-115,-80]dBm




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Inter-Frequency Handoverrelated parameters

Weight of the Currently Used Frequency for 2A/2B/2D/2F

3GPP name W used frequency


Abbreviated

nameWused[MAX_INTER_MEAS_EVENT]

Description

This parameter is used for quality judgment for the carrier of currently used frequency, which indicates theweight of the best cell in the quality judgment and is related to the measurement quantity and the event type(only for event 2a/2b/2d/2f).


Description

Parameter name Weight of the Currently Used Frequency for 2A/2B/2D/2F

Range and step (0.0..2.0 ) step 0.1

Default value

UE Period Report Parameters for CPICH Ec/No: -UE Inter-frequency Event Report Parameters for CPICH Ec/No: [0.0, 0.0, 0.0,0.0,0.0,0.0]UE Period Report Parameters for CPICH RSCP: -UE Inter-frequency Event Report Parameters for CPICH RSCP: [0.0, 0.0, 0.0,0.0,0.0,0.0]




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Inter-Frequency Handoverrelated parameters Absolute Threshold of the Quality of the Non-used Frequency for

2B/2C/2E

3GPP name Threshold non used frequency


Abbreviated

nameThreshNoUsedFreq[MAX_INTER_MEAS_EVENT]

DescriptionThis parameter indicates the absolute threshold that is required to be configured for event 2b/2c/2e (usedwhen judging the quality of the not used frequency).


Description

Parameter name Absolute Threshold of the Quality of the Non-used Frequency for 2B/2C/2E

Range and stepCPICH RSCP: (-115..-25 )dBm step 1dBmCPICH Ec/No: (-24..0) dB step 1dB

Default value

UE Period Report Parameters for CPICH Ec/No: -

UE Inter-frequency Event Report Parameters for CPICH Ec/No: [-24,-5,-5,-24,-13,-24]dBUE Period Report Parameters for CPICH RSCP: -UE Inter-frequency Event Report Parameters for CPICH RSCP: [-115,-50,-50,-115,-95,-115]dBm




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Weight of the Non-used Frequency for 2A/2B/2C/2E

3GPP name W non-used frequency


Abbreviated

nameWNoUsed[MAX_INTER_MEAS_EVENT]

DescriptionThis parameter is used when judging the quality of the cells of not used frequencies. This parameterindicates the weight of the best cell in the quality judgment (only for event 2a/2b/2c/2e).MAX_INTEREAS_EVENT is the maximum number of inter-frequecy measument event which is 6.

Description

Parameter name Weight of the Non-used Frequency for 2A/2B/2C/2E

Range and step (0.0..2.0 ) step 0.1

Default value

UE Period Report Parameters for CPICH Ec/No: -UE Inter-frequency Event Report Parameters for CPICH Ec/No: [0.0, 0.0, 0.0,0.0,0.0,0.0]UE Period Report Parameters for CPICH RSCP: -UE Inter-frequency Event Report Parameters for CPICH RSCP: [0.0, 0.0, 0.0,0.0,0.0,0.0]




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Hysteresis



Abbreviated

nameHysteresis[MAX_INTER_MEAS_EVENT]

Description

This parameter indicates the hysteresis used when judging whether to trigger the event. This parametermakes it different between the status to trigger an event and the status to leave the event, so as to avoid thetrigger status change due to very small change. Different events are configured separately and can be

configured with different values.MAX_INTEREAS_EVENT is the maximum number of inter-frequecy measument event which is 6.

Description


Range and step(0, 0.5..14.5)dB step 0.5dB

Default value

UE Period Report Parameters for CPICH Ec/No: -UE Inter-frequency Event Report Parameters for CPICH Ec/No: [4,4,4,4,4,4]dBUE Period Report Parameters for CPICH RSCP: -UE Inter-frequency Event Report Parameters for CPICH RSCP: [4,4,4,4,4,4]dB




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Time to Trigger



Abbreviated

nameTrigTime[MAX_INTER_MEAS_EVENT]

Description

This parameter indicates the time difference between having detected the event generation and reporting theevent. Only when the event generation is detected and still meets all requirements of event triggering afterTime to trigger, the event can be triggered and reported. The larger the value is, the stricter the judgment is

for the event to be triggered. The parameter should be set according to the actual requirements. Sometimes,if it is set too large, the quality of calls may decrease.MAX_INTEREAS_EVENT is the maximum number of inter-frequecy measument event which is 6.

Description


Range and step (0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560, 5000)ms

Default value

UE Period Report Parameters for CPICH Ec/No: -UE Inter-frequency Event Report Parameters for CPICH Ec/No: [100,100,100,640,100,640]UE Period Report Parameters for CPICH RSCP: -UE Inter-frequency Event Report Parameters for CPICH RSCP: [100,100,100,640,100,640]




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Compressed Mode

Two ways to generate compressed mode frames

Halving of Spreading Factor (SF)

By halving the SF, the bandwidth can be increased so that some timeslots in one

radio frame can be specially assigned for inter-frequency/Inter-RAT measurement and

some can be specially assigned for data transmission. This transmission strategy is

generally used in services which raise high requirements for delay and assurance of

minimum data rate, for example, CS- and S-type PS data services.

Higher Layer SchedulingThe higher layer scheduling is a strategy in which the higher layer adjusts and

controls the data transmission rate. Some timeslots in a radio frame can be specially

assigned for inter-frequency/Inter-RAT measurement and some can be specially

assigned for data transmission while the bandwidth remains unchanged. This strategy

is generally used for non-real time services with low requirements for delay, for

example, I/B-type PS data services.


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Compressed Mode

#14#Nfirst-1

(1) Single-frame method

(2) Double-frame method

First radio frame Second radio frame

Radio frameTransmission gap

Transmission gap

#0

#14

#Nlast+1

#Nfirst-1 #Nlast+1#0

Transmission Gap (TG) position


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Compressed Mode

Parameters of compressed mode

Transmissiongap 2

TGSN

TGL2

TG pattern 1

#TGPRC

gap 1Transmission

TGD

TGPL1

TG pattern 1

TGL1

#1 #2 #3 #4 #5

TG pattern 1

TG pattern 1

TG pattern 1

TG pattern 1

TG pattern 1


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Inter-RAT Handover




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Introduction

Inter-RAT handover refers to UE switches from one radio access system to

another one. Here it only applies to the mobility management for UE

switching from UTRAN to GERAN (the mobility management from GERAN to

UTRAN belongs to the strategy of GERAN).

F1

cellIntra-frequency mobility

Inter-RAT mobility

Inter-RAT HandoverPolicy

GSM


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Requirement

This function requires UE to support both WCDMA and GSM,

Moreover, the GSM also needs to offer related functions to support

Inter-RAT handover.


Services which WCDMA-to-GSM handover supports

voice services

Video service fallback to voice service and handover to 2G. (3GPP

R6)

PS transferred to GPRS/GERAN


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Triggers

The factors triggering inter-frequency hard handover include radio quality and load

Radio quality: the quality of the used frequency becoming worse and inter-

frequency measurement initiation conditions cannot be met or the quality of other

frequencies are also poor, and then handovers UE to the cell of GERAN based on

Inter-RAT measurement results

PCPICH(RSCP/EcNo) quality of cell in current serving carrier frequency.

Uplink Block Error Rate (BLER) of the Dedicated Channel (DCH).

Uplink transmit power of DPCH.

Downlink transmit power of DPCH.

Load: When the load of cell in current UTRAN system is too heavy, the system

switches partial services of this cell to an 2G adjacent cell

Priority: Load > radio quality



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Inter-RAT Handoverrelated parameters

Absolute Threshold of the Quality of UTRAN Cell for 3A

3GPP name Threshold own system


Abbreviated

nameThresh[MAX_RAT_MEAS_EVENT]

Description

This parameter indicates the absolute threshold of the UTRAN cell quality that UE uses to judge event 3a.

The range and unit of the parameter relate to the measurement quantity of UTRAN system.

MAX_RAT_MEAS_EVENT is the maximum number of inter-RAT measurement events which takes the value

of 4.

Description

Parameter name Absolute Threshold of the Quality of UTRAN Cell for 3A

Range and stepCPICH RSCP: (-115..-25 )dBm step 1dBm

CPICH Ec/No: (-24..0) dB step 1dB

Default value

Period Report Parameters for Own System CPICH Ec/No: -

UE Event Report Parameters for Own System CPICH Ec/No: [-6, -24,-24,-24]

Period Report Parameters for Own System CPICH RSCP: -

UE Event Report Parameters for Own System CPICH RSCP: [-95, -115,-115,-115]




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Weight of the UTRAN System for 3A

W


Abbreviated

nameW[MAX_RAT_MEAS_EVENT]

Description

This parameter is used when judging the quality of the UTRAN system in inter-RAT measurement, which

indicates the weight of the best cell in the quality judgment (only for event 3a).

MAX_RAT_MEAS_EVENT is the maximum number of inter-RAT measurement events which takes the value

of 4.

Description

Parameter name Weight of the UTRAN System for 3A

Range and step (0.0..2.0) step 0.1

Default value


UE Event Report Parameters for Own System CPICH Ec/No: [0, -, -, -]


UE Event Report Parameters for Own System CPICH RSCP: [0, -, -, -]




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Absolute Threshold of the Quality of Other RAT for 3A/3B/3C

3GPP name Threshold other system


Abbreviated

nameThreshSys[MAX_RAT_MEAS_EVENT]

Description

This parameter indicates the absolute threshold used when judging the quality of other RAT configured for

event 3a/3b/3c. The value range and unit of this parameter are related to the measurement quantity of other

system, at present the measurement quantity can only be GSM Carrier RSSI of the GSM system, which

corresponds to the CPICH RSCP of UTRAN system, so the value range and unit of this parameter

correspond to the CPICH RSCP.MAX_RAT_MEAS_EVENT is the maximum number of inter-RAT measurement events which takes the value

of 4.

Description

Parameter name Absolute Threshold of the Quality of Other RAT for 3A/3B/3C

Range and stepCPICH RSCP: (-115..-25 )dBm step 1dBm

CPICH Ec/No: (-24..0) dB step 1dB

Default value


UE Event Report Parameters for Own System CPICH Ec/No: [-90, -95, -95, -115]dBm


UE Event Report Parameters for Own System CPICH RSCP: [-90, -95, -95, -115]dBm




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Inter-RAT Handoverrelated parameters Hysteresis



Abbreviated name Hysteresis[MAX_RAT_MEAS_EVENT]

Description

This parameter indicates the hysteresis used when judging whether to trigger the event. This parametermakes it different between the status to trigger an event and the status to leave the event, so as to avoidthe trigger status change due to very small change.The larger the value is, the larger the difference between the status to trigger the event and the status toleave the event will be.This parameter is related to the measurement quantity and the event type.

Different events are configured separately and can be configured with different hysteresisMAX_RAT_MEAS_EVENT is the maximum number of inter-RAT measurement events which takes thevalue of 4.

Description


Range and step (0, 0.5..7.5)dB step 0.5dB

Default value

Period Report Parameters for Own System CPICH Ec/No: -UE Event Report Parameters for Own System CPICH Ec/No: [4,4,2,4]dBPeriod Report Parameters for Own System CPICH RSCP: -UE Event Report Parameters for Own System CPICH RSCP: [4,4,4,4]dB




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Inter-RAT Handoverrelated parameters Time to Trigger



Abbreviated

nameTrigTime[MAX_RAT_MEAS_EVENT]

Description

This parameter indicates the time difference between having detected the event generation and reporting theevent. Only when the event generation is detected and still meets all requirements of event triggering afterTime to trigger, the event can be triggered and reported. The larger the value is, the stricter the judgment isfor the event to be triggered. The parameter should be set according to the actual requirements. Sometimes,if it is set too large, the quality of calls may decrease.

MAX_RAT_MEAS_EVENT is the maximum number of inter-RAT measurement events which takes the valueof 4.

Description


Range and step (0, 10, 20, 40, 60, 80, 100, 120, 160, 200, 240, 320, 640, 1280, 2560, 5000)ms

Default value

Period Report Parameters for Own System CPICH Ec/No: -UE Event Report Parameters for Own System CPICH Ec/No: [100,100,100,100]msPeriod Report Parameters for Own System CPICH RSCP: -UE Event Report Parameters for Own System CPICH RSCP: [100,100,100,100]ms




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Inter-RAT Handover




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Cell Category

After HSDPA is introduced, according to cell capability cells can be categorized as following

Not Support HSUPA and HSDPA

Support HSDPA and DCH

Support HSDPA only

HSDPA HandoverPolicy

Characteristic

The big difference between HS-DSCH and DPCH is that there is no concept of macro

diversityfor HS-PDSCH, but its associated DPCH has macro diversity

The physical channels of HS-DSCH does not support softer handover

HS-DSCH supports fast cell selection

Associated DPCH supports softer handover


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Change of HS-DSCH Serving Cell

s

Source HS-DSCH cell

Serving HS-DSCH

radio link

Radio link part of the

active set,

other than the serving

HS-DSCH radio link

t

s t Target HS-DSCH cell


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Intra-frequency handover

HS-DSCH->DCH: triggered by 1B/1C/1D

DCH->HS-DSCH:triggered by 1D

HS->DSCH->HS-DSCH: triggered by 1B/1C/1D


Inter-frequency handover

HS-DSCH->DCH:The UE has HSDPA and HS-DSCH is used before handover, but

HSDPA admission control of target cell fails. A decision of inter-frequency hard

handover together with HS-DSCH transferring to DCH is made

DCH->HS-DSCH:The UE has HSDPA and DCH is used before handover, and

HSDPA admission control of target cell succeeds. A decision of inter-frequency hard

handover together with DCH transferring to HS-DSCH is made. HS->DSCH->HS-DSCH:The UE has HSDPA and HS-DSCH is used before

handover , and HSDPA admission control of target cell succeeds. A decision of inter-

frequency hard handover together with HS-DSCH serving cell change is made.


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Inter-RAT handover

UTRAN->GSM/GERAN

The HSDPA service is included and then the same handover flow as that for

between R99 systems is performed.

GSM/GERAN -> UTRAN

The strategy is similar as that when a service accesses the system at first

time. If both service and target cell support HS-DSCH/DCH, the service is

established directly on HS-DSCH/DCH, otherwise on DCH/DCH.



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HSDPA Handoverrelated parameters

Timer for Event 1D in HSPA or MBMS

3GPP name -

3GPP reference -

Abbreviated

nameT1d

Description

For HSPA, this parameter indicates the minimum interval between two HSPA serving cell changes or

channel , which helps to avoid too frequent HSPA serving cell changes and channel transition.

For MBMS, this parameter indicates the minimum interval between two best cell changes due to event 1d

which helps to avoid too frequent change between PTP and PTM bearer types.

Description

Parameter name Timer for Event 1D in HSPA or MBMS

Range and step (0..65535)s step 1

Default value 4s

Working scope RNC



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HSDPA Handoverrelated parameters

HSDPA Associate CM Method

3GPP name -

3GPP reference -

Abbreviated

nameHsdpaCmAssoMode

Description

This parameter indicates the HSUPA associate Compressed Mode method. The value of Serial means that

compressed mode and HSUPA can not be used together, if HSUPA is used, only when HS-DSCH->DCH

channel transition is completed can the compressed mode be activated.

The value of Parallel means that compressed mode and HSUPA can be used together

Description

Parameter name

This parameter indicates the HSDPA associate compressed mode method. The value of Serial means that

compressed mode and HSDPA can not be used together, if HSDPA is used, only when HS-DSCH->DCH


The value of Parallel means that compressed mode and HSDPA can be used together.

Range and step0: Serial

1: Parallel

Default value Parallel

Working scope RNC



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Inter-RAT Handover




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Cell Category

After HSUPA is introduced, according to cell capability cells can be categorized

as following

Not Support HSUPA and HSDPA

Support HSDPA and DCH

Support HSDPA only

Support HSUPA , HSDPA and DCH

Support HSUPA and HSDPA

HSUPA HandoverPolicy


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Different Active Sets of E-DCH and DCH

HSUPA has macro diversity and the E-DCH active set and DCH active

set can be different.

cell1 cell2 Cell3

DCH active setE-DCH active set


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Intra-frequency handover

HS-DSCH/E-DCH->DCH/DCH: triggered by 1B/1C/1D

DCH/DCH->HS-DSCH/E-DCH : triggered by 1D

HS-DSCH/E-DCH->HS-DSCH/E-DCH : triggered by 1B/1C/1D

HS-DSCH/E-DCH->HS-DSCH/DCH : triggered by 1B/1C/1D

HS-DSCH/DCH->HS-DSCH/E-DCH :triggered by 1D



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HS-DSCH/E-DCH->DCH/DCH :The UE has HSPA and HS-DSCH/E-DCH is used

before handover, but HSPA admission control of target cell fails. A decision of inter-

frequency hard handover together with HS-DSCH/E-DCH transferring to DCH/DCH is

made

DCH/DCH->HS-DSCH/E-DCH :The UE has HSPA and DCH/DCH is used before

handover, and HSPA admission control of target cell succeeds. A decision of inter-

frequency hard handover together with DCH/DCH transferring to HS-DSCH/E-DCH is

made.

HS-DSCH/E-DCH->HS-DSCH/E-DCH::The UE has HSPA and HS-DSCH/E-DCH is

used before handover , and HSPA admission control of target cell succeeds. A decision of

inter-frequency hard handover together with HS-DSCH/E-DCH serving cell change is

made.


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HS-DSCH/E-DCH->HS-DSCH/DCH : The UE has HSPA and HS-DSCH/E-DCH is

used before handover, but HSUPA admission control of target cell fails. A decision of inter-

frequency hard handover together with HS-DSCH/E-DCH transferring to HS-DSCH/DCH

is made

HS-DSCH/DCH->HS-DSCH/E-DCH :The UE has HSPA and HS-DSCH/E-DCH is

used before handover, and HSPA admission control of target cell succeeds. A decision of

inter-frequency hard handover together with HS-DSCH/DCH transferring to HS-DSCH/E-

DCH is made.


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Inter-RAT handover

UTRAN->GSM/GERAN

The HSPA service is included, and then the same handover flow as that for

between R99 systems is performed.

GSM/GERAN -> UTRAN

Similar to the handover between R99 systems, if the target cell support HS-

DSCH/E-DCH, the service is established directly on HS-DSCH/E-DCH.



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HSUPA Handoverrelated parameters

Maximum Number of Cells in E-DCH Active Set

3GPP name -


Abbreviated

nameMaxNumOfEdchAct

DescriptionThis parameter indicates the maximum number of cells allowed inE-DCH active set.

Description

Parameter name Maximum Number of Cells in E-DCH Active Set

Range and step 1..4

Default value 3

Working scope RNC



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HSUPA Handoverrelated parameters

HSUPA Associate CM Method

3GPP name -

3GPP reference -

Abbreviated

nameHsupaCmAssoMode

Description

This parameter indicates the HSUPA associate Compressed Mode method. The value of Serial means that

compressed mode and HSUPA can not be used together, if HSUPA is used, only when HS-DSCH->DCH


The value of Parallel means that compressed mode and HSUPA can be used together

Description

Parameter name HSUPA Associate CM Method

Range and step

0: Serial

1: Parallel

Default value Serial

Working scope RNC



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ZTE UMTS Handover

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