zte umts handover
TRANSCRIPT
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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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Intra-Frequency HandoverPolicy
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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Intra-Frequency HandoverPolicy
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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Intra-Frequency HandoverPolicy
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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Intra-Frequency HandoverPolicy
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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Intra-Frequency HandoverPolicy
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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Intra-Frequency HandoverPolicy
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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Intra-Frequency HandoverPolicy
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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Intra-Frequency Handoverrelated parameters
Hysteresis
3GPP name Hysteresis
3GPP reference TS 25.331: RRC Protocol Specification
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]
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Intra-Frequency Handoverrelated parameters
Reporting Deactivation Threshold for Event 1A
3GPP name Reporting deactivation threshold
3GPP reference TS 25.331: RRC Protocol Specification
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
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Intra-Frequency Handoverrelated parameters
Replacement Activation Threshold for Event 1C and 1J
3GPP name Replacement activation threshold
3GPP reference TS 25.331: RRC Protocol Specification
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: [-]
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Intra-Frequency Handoverrelated parameters
Time to Trigger
3GPP name Time to trigger
3GPP reference TS 25.331: RRC Protocol Specification
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
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Intra-Frequency Handoverrelated parameters
Amount of Reporting for Event 1A/1B/1C/1J
3GPP nameAmount of reporting
3GPP reference TS 25.331: RRC Protocol Specification
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]
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Intra-Frequency Handoverrelated parameters
Reporting Interval for Event 1A/1B /1C/1J
3GPP nameReporting interval
3GPP reference TS 25.331: RRC Protocol Specification
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
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Intra-Frequency Handover
Inter-frequency Handover
Inter-RAT Handover
HSDPA-related Handover
HSUPA-related 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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Inter-Frequency HandoverPolicy
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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Inter-Frequency HandoverPolicy
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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Inter-Frequency HandoverPolicy
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
3GPP reference TS 25.331: RRC Protocol Specification
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
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Inter-Frequency Handoverrelated parameters
Weight of the Currently Used Frequency for 2A/2B/2D/2F
3GPP name W used frequency
3GPP reference TS 25.331: RRC Protocol Specification
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).
MAX_INTEREAS_EVENT is the maximum number of inter-frequecy measument event which is 6.
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]
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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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
3GPP reference TS 25.331: RRC Protocol Specification
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).
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 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
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Inter-Frequency Handoverrelated parameters
Weight of the Non-used Frequency for 2A/2B/2C/2E
3GPP name W non-used frequency
3GPP reference TS 25.331: RRC Protocol Specification
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]
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Inter-Frequency Handoverrelated parameters
Hysteresis
3GPP name Hysteresis
3GPP reference TS 25.331: RRC Protocol Specification
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
Parameter name Hysteresis
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
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Inter-Frequency Handoverrelated parameters
Time to Trigger
3GPP name Time to trigger
3GPP reference TS 25.331: RRC Protocol Specification
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
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
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]
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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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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Intra-Frequency Handover
Inter-frequency Handover
Inter-RAT Handover
HSDPA-related Handover
HSUPA-related 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.
Inter-RAT HandoverPolicy
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
Inter-RAT HandoverPolicy
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Inter-RAT Handoverrelated parameters
Absolute Threshold of the Quality of UTRAN Cell for 3A
3GPP name Threshold own system
3GPP reference TS 25.331: RRC Protocol Specification
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]
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Inter-RAT Handoverrelated parameters
Weight of the UTRAN System for 3A
W
3GPP reference TS 25.331: RRC Protocol Specification
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
Period Report Parameters for Own System CPICH Ec/No: -
UE Event Report Parameters for Own System CPICH Ec/No: [0, -, -, -]
Period Report Parameters for Own System CPICH RSCP: -
UE Event Report Parameters for Own System CPICH RSCP: [0, -, -, -]
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Inter-RAT Handoverrelated parameters
Absolute Threshold of the Quality of Other RAT for 3A/3B/3C
3GPP name Threshold other system
3GPP reference TS 25.331: RRC Protocol Specification
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
Period Report Parameters for Own System CPICH Ec/No: -
UE Event Report Parameters for Own System CPICH Ec/No: [-90, -95, -95, -115]dBm
Period Report Parameters for Own System CPICH RSCP: -
UE Event Report Parameters for Own System CPICH RSCP: [-90, -95, -95, -115]dBm
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Inter-RAT Handoverrelated parameters Hysteresis
3GPP name Hysteresis
3GPP reference TS 25.331: RRC Protocol Specification
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
Parameter name Hysteresis
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
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Inter-RAT Handoverrelated parameters Time to Trigger
3GPP name Time to trigger
3GPP reference TS 25.331: RRC Protocol Specification
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
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 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
Working scope UTRAN Cell and Basic Priority Related
Related feature Handover Control
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Intra-Frequency Handover
Inter-frequency Handover
Inter-RAT Handover
HSDPA-related Handover
HSUPA-related 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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HSDPA HandoverPolicy
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
HSDPA HandoverPolicy
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.
HSDPA HandoverPolicy
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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
Related feature Handover Control
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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
channel transition is completed can the compressed mode be activated.
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
Related feature Handover Control
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Intra-Frequency Handover
Inter-frequency Handover
Inter-RAT Handover
HSDPA-related Handover
HSUPA-related 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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HSUPA HandoverPolicy
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
HSUPA HandoverPolicy
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HSUPA HandoverPolicy
Inter-frequency handover
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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HSUPA HandoverPolicy
Inter-frequency handover
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.
HSUPA HandoverPolicy
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HSUPA Handoverrelated parameters
Maximum Number of Cells in E-DCH Active Set
3GPP name -
3GPP reference TS 25.331: RRC Protocol Specification
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
Related feature Handover Control
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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
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 HSUPA Associate CM Method
Range and step
0: Serial
1: Parallel
Default value Serial
Working scope RNC
Related feature Handover Control
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