ZTE
LTE
FDD
Inter-RAT
ZTE
LTE
FDD
Inter-RAT
Interopera
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or used without the prior written permission of ZTE.
Due to update and improvement of ZTE products and technologies, information in this document is Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.
subjected to change without notice.
ZTE LTE FDD Inter-RAT Interoperability Feature
ZTE LTE FDD Inter-RAT Interoperability Feature
Guide
Guide
Vers
Version ion Date Date AuAuthor thor Reviewer Reviewer NoNotete ss V1.00
V1.00 ZTZTE E Not Not open open to to the the third third partyparty
TABLE OF CONTENTS
TABLE OF CONTENTS
1
1
Introduction
Introduction ...
...
...
...
...
... 2
2
1.1
1.1
Scope
Scope ...
...
...
...
...
...
... 2
2
1.2
1.2
Targe
Target
t Grou
Group
p ...
...
...
...
... 2
... 2
1.3
1.3
Featu
Feature
re Attribute...
Attribute...
...
...
...
... 2
2
1.4
1.4
Correlatio
Correlation
n with
with Other
Other Featu
Features
res ...
...
...
... 3
... 3
2
2
Ter
Term
minology
inology ...
...
...
...
...
... 3
3
2.1
2.1
Definiti
Definitions
ons...
...
...
...
...
... 3
3
3
3
Feat
Feature
ure Introduction...
Introduction...
...
...
... 3
... 3
3.1
3.1
Overvie
Overview...
w...
...
...
...
... 4
4
3.2
3.2
RSCP
RSCP & Ec
& Ec/No Based
/No Based M
Mobility
obility Man
Management ...
agement ...
...
... 4
... 4
3.3
3.3
Service
Service Based
Based Ha
Handov
ndover
er ...
...
...
... 4
... 4
4
4
Technical
Technical De
Description ...
scription ...
...
...
... 4
.. 4
4.1
4.1
M
Meas
easurement
urement ...
...
...
...
...
... 4
4
4.2
4.2
LTE-to-U
LTE-to-UTRAN
TRAN Handov
Handover
er Decision
Decision ...
...
...
... 9
.... 9
4.3
4.3
LTE-to-G
LTE-to-GERAN
ERAN Ha
Handover
ndover Decision...
Decision...
... 9
... 9
4.4
4.4
LTE
LTE CSFB
CSFB with
with PS
PS Ha
Handov
ndover
er Decision ....
Decision ...
...
... 1
... 10
0
4.5
4.5
IInter-RAT
nter-RAT Handov
Handover
er ...
...
...
...
...
.... 11
11
4.6
4.6
Redirection
Redirection ...
...
...
...
...
... 12
12
4.7
4.7
RSCP
RSCP & Ec
& Ec/No Based
/No Based M
Mobility
obility Man
Management ...
agement ...
...
... 15
... 15
4.8
4.8
Service
Service Based
Based Ha
Handov
ndover
er ...
...
...
... 16
... 16
5
5
Ke
Key Paramete
y Parameters
rs and
and Configuration
Configuration ...
...
...
... 17
17
5.1
5.1
IInter-RAT
nter-RAT Operation
Operation Function ...
Function ...
...
... 17
... 17
5.1.1
5.1.1
Parameters
Parameters List ...
List ...
...
... 17
... 17
5.1.2
5.1.2
Parameters
Parameters Configu
Configuration
ration rule ...
rule ...
...
... 17
... 17
5.1.3
5.1.3
Parameters
Parameters Configu
Configuration
ration Procedure ...
Procedure ...
... 21
... 21
5.2
5.2
IInter-RAT
nter-RAT Redirection
Redirection Function
Function ...
...
...
... 27
... 27
5.2.1
5.2.1
Parameters
Parameters List ...
List ...
...
... 27
... 27
5.2.2
5.2.2
Parameters
Parameters Configu
Configuration
ration rule ...
rule ...
...
... 28
... 28
5.2.3
5.2.3
Parameters
Parameters Configu
Configuration
ration Procedure ...
Procedure ...
... 29
... 29
5.3
5.3
IInter-RAT
nter-RAT PS
PS HO
HO Function
Function ...
...
...
... 3
... 33
3
5.3.1
5.3.1
Parameters
Parameters List ...
List ...
...
... 33
... 33
5.3.2
5.3.2
Parameters
Parameters Configu
Configuration
ration rule ...
rule ...
...
... 33
... 33
5.3.3
5.3.3
Parameters
Parameters Configu
Configuration
ration Procedure ...
Procedure ...
... 34
... 34
5.4
5.4
CCO
CCO Fun
Function...
ction...
...
...
...
... 36
36
5.4.1
5.4.1
Parameters
Parameters List ...
List ...
...
... 36
... 36
5.4.2
5.4.2
Parameters
Parameters Configu
Configuration
ration rule ...
rule ...
...
... 36
... 36
5.4.3
5.4.3
Parameters
Parameters Configu
Configuration
ration Procedure ...
Procedure ...
... 36
... 36
5.5
5.5.1
Parameters List ... 37
5.5.2
Parameters Configuration rule ... 38
5.5.3
Parameters Configuration Procedure ... 42
5.6
Inter-RAT Load Balancing Function... 50
5.6.1
Parameters List ... 50
5.6.2
Parameters Configuration rule ... 51
5.6.3
Parameters Configuration Procedure ... 55
5.7
Inter-RAT Cell Reselection Function ... 57
5.7.1
Parameters List ... 57
5.7.2
Parameters Configuration rule ... 59
5.7.3
Parameters Configuration Procedure ... 73
6
Feature Validation... 81
6.1
Inter-RAT Redirection ... 81
6.1.1
Topology ... 81
6.1.2
Test Specification ... 82
6.1.3
Test Result ... 83
6.2
Inter-RAT PS HO... 85
6.2.1
Topology ... 85
6.2.2
Test Specification ... 85
6.2.3
Test Result ... 86
6.3
CCO... 91
6.3.1
Topology ... 91
6.3.2
Test Specification ... 91
6.3.3
Test Result ... 91
6.4
CSFB ... 96
6.5
Inter-RAT Load Balance... 96
6.5.1
Topology ... 96
6.5.2
Test Specification ... 96
6.5.3
Test Result ... 97
6.6
Inter-RAT Cell Reselection ... 101
6.6.1
Topology ... 101
6.6.2
Test Specification ... 101
6.6.3
Test Result ... 101
7
Related Counters, KPI and Alarm ... 104
7.1
Inter-RAT Redirection Function Related Counters, KPI and Alarm ... 104
7.1.1
Inter-RAT Redirection Function Related Counters ... 104
7.1.2
Inter-RAT Redirection Function Related KPI... 105
7.1.3
Inter-RAT Redirection Function Related Alarm ... 105
7.2
Inter-RAT PS HO Function Related Counters, KPI and Alarm ... 105
7.2.2
Inter-RAT PS HO Function Related KPI ... 109
7.2.3
Inter-RAT PS HO Function Related Alarm ... 109
7.3
CCO Function Related Counters, KPI and Alarm ... 109
7.3.1
CCO Function Related Counters ... 109
7.3.2
CCO Function Related KPI ... 109
7.3.3
CCO Function Related Alarm ... 110
7.4
CSFB Function Related Counters, KPI and Alarm... 110
7.4.1
CSFB Function Related Counters ... 110
7.4.2
CSFB Function Related KPI ... 111
7.4.3
CSFB Function Related Alarm... 111
7.5
Inter-RAT Load Balancing Function Related Counters, KPI and Alarm ... 111
7.5.1
Inter-RAT Load Balancing Function Related Counters ... 111
7.5.2
Inter-RAT Load Balancing Function Related KPI ... 112
7.5.3
Inter-RAT Load Balancing Function Related Alarm ... 112
7.6
Inter-RAT Cell Reselection Function Related Counters, KPI and Alarm ... 112
7.6.1
Inter-RAT Cell Reselection Function Related Counters ... 112
7.6.2
Inter-RAT Cell Reselection Function Related KPI ... 112
7.6.3
Inter-RAT Cell Reselection Function Related Alarm ... 112
FIGURES
Figure 4-1 LTE CSFB Handover Procedure ... 10
Figure 4-2 Inter-RAT Handover ... 12
Figure 4-3 Blind Redirection ... 13
Figure 4-4 Measurement Based Redirection ... 14
Figure 4-5 Measurement Based Inter-RAT Redirection ... 15
Figure 5-1 Configure Inter-RAT Neighbor Cell Parameters... 22
Figure 5-2 Configure Inter-RAT Neighbor Relation Parameters... 24
Figure 5-3 Configure Measurement Parameters for UTRAN ... 25
Figure 5-4 Configure Measurement Parameters for GERAN ... 26
Figure 5-5 UE Access Mode Configuration ... 27
Figure 5-6 Switch Configuration of Redirection ... 30
Figure 5-7 RAT Priority Configuration ... 31
Figure 5-8 UTRAN Frequency Redirection Priority Configuration ... 31
Figure 5-9 UTRAN Frequency Redirection Priority Configuration ... 32
Figure 5-10 UE Capability Information ... 35
Figure 5-11 UE Capability Information ... 37
Figure 5-12 Configuration of CSFB Based Measurement Switch and Method of CSFB ... 43
Figure 5-13 CSFB Target System Priority Configuration for UE in RRC_IDLE state ... 44
Figure 5-14 CSFB Target System Priority Configuration for UE in RRC_CONNECTED state
... 45
Figure 5-15 UTRAN Frequency CSFB Priority Configuration ... 45
Figure 5-16 GERAN Frequency CSFB Priority Configuration ... 46
Figure 5-17 Switch for CS Fallback base LAI and Multi-PLMN local strategy for CSFB ... 47
Figure 5-18 Local Strategy for Multi-PLMN Configuration ... 47
Figure 5-19 Setting UE to Support CS Domain and PS Domain... 48
Figure 5-20 Call Manager Usage ... 49
Figure 5-21 Load Balancing Function parameters Configuration ... 55
Figure 5-23 User- Inactivity Timer on Control Panel Configuration ... 74
Figure 5-24 E-UTRAN Cell Reselection Parameters Configuration ... 75
Figure 5-25 UTRAN FDD Cell Reselection Configuration ... 77
Figure 5-26 UTRAN TDD Cell Reselection Configuration ... 78
Figure 5-27 GERAN Cell Reselection Configuration ... 79
Figure 6-1 Inter-RAT Redirection Test Environment Network ... 81
Figure 6-2 RRC Connection Reconfiguration Message Carries the A2 Event ... 83
Figure 6-3 UE Reports the A2 Measurement Report... 84
Figure 6-4 Sending the UTRAN Frequency to the UE Through the RRC Connection Release
Message ... 84
Figure 6-5 Sending the GERAN Frequency to the UE Through the RRC Connection
Release Message ... 85
Figure 6-6 UE Capacity Query Message ... 87
Figure 6-7 A2 Event in the RRC Connection Reconfiguration Message... 87
Figure 6-8 UE Reports A2 Measurement ... 87
Figure 6-9 eNodeB Instructs the UE to Measure the Frequency, Cell ID, and B2 Threshol d
of the UTRAN Neighbor Cell ... 88
Figure 6-10 UE Reports the B2 Event ... 88
Figure 6-11 eNodeB Requests Capacities and UE Reports Capacities... 89
Figure 6-12 E-UTRAN Sends the Mobility From E-UTRA Command message to the UE .. 89
Figure 6-13 UE Sends the handoverToUTRANComplete Message to the RNC ... 90
Figure 6-14 UE Originates the RAU Flow ... 90
Figure 6-15 Querying Whether the UE Supports the CCO Feature ... 92
Figure 6-16 eNodeB Sends A2 Event Configuration Through RRC Connction
Reconfiguration Message... 93
Figure 6-17 UE Reports the A2 Event Measurement reporting After A2 Threshold Is
Reached ... 93
Figure 6-18 eNodeB Delivers B2 Event Configuration Through the RRC Connection
Reconfiguration Message... 94
Figure 6-19 eNodeB Sends MobilityFromEutranCommand with Purpose CellChangeOrder
to the UE ... 95
Figure 6-20 eNodeB Sends MobilityFrom EutranCommand without SI Information to the UE
... 95
Figure 6-21 RIM Message Sent by the eNodeB ... 97
Figure 6-22 RIM Message Received by the eNodeB ... 98
Figure 6-23 eNodeB sends RRC Connection Reconfiguration message including B1
measurement configuration... 99
Figure 6-24 UE2 Reports the Measurement Reporting ... 100
Figure 6-25 UE2 Originates a Handover to the UMTS Cell ... 100
Figure 6-26 SIB7 Message ... 102
Figure 6-27 SIB6 Message ... 103
TABLES
Table 5-1 Common Parameters List ... 17
Table 5-2 Parameters Configuration rule ... 17
Table 5-3 Parameters List ... 27
Table 5-4 Parameters Configuration rule ... 28
Table 5-5 Inter-RAT PS HO Parameters List ... 33
Table 5-6 Inter-RAT PS HO Parameters Configuration rule... 33
Table 5-7 Parameters List ... 37
Table 5-8 Parameters Configuration rule ... 38
Table 5-9 Parameters List ... 50
Table 5-10 Parameters Configuration rule ... 51
Table 5-11 Parameters List ... 57
Table 5-12 Parameters Configuration rule ... 59
Table 6-1 Test Devices ... 82
Table 6-2 Inter-RAT Redirection Test ... 82
Table 6-3 Inter-RAT PS HO Test ... 85
Table 6-4 CCO Feature Test ... 91
Table 6-5 Inter-RAT Load Balance Test ... 96
Table 6-6 Inter-RAT Cell Reselection Test ... 101
Table 7-1 Inter-RAT Redirection Function Related Counters ... 104
Table 7-2 Inter-RAT PS HO Function Related Counters ... 105
Table 7-3 Inter-RAT PS HO Function Related KPI ... 109
Table 7-4 CCO Function Related Counters ... 109
Table 7-5 CSFB Function Related Counters... 110
1
Introduction
1.1
Scope
This document describes inter-RAT interoperability, including technical description, key parameter configuration, related counters, KPI statistics, alarms, and function verification.
1.2
Target Group
This document is intended for:
Personnel who nee d to understand FDD Inter- RAT Int eroperability function
Personnel who work with ZTE products
1.3
Feature Attribute
For FDD single-mod e eNodeB V3.20.30 series: OMMB version: V12.13.44
EMS version: V12.13.44
For GUL multi-mod e eNodeB V4.13.10 s eries: OMMB version: V12.13.42
EMS version: V12.13.42
Note:
FDD single-mode V3.20.30 corresponds to GUL multi-mode V4.13.10, and LTE technology description and operation requirements in the corresponding versions are the same.
Involved NEs: UE eNodeB MME S-GW BSC/RNC SGSN P-GW HSS
√
√
√
- - - - -Note: *-: Not involved*√: involved
1.4
Correlation with Other Features
None
2
Terminology
2.1
Definitions
None.
3
Feature Introduction
In the LTE system, the UE mobility in connected state is fulfilled through handover and redirection. The handover is divided into intra-RAT handover (between E-UTRAN and E-UTRAN) and inter-RAT handover (between E-UTRAN and UTRAN, or between E-UTRAN and GERAN) in accordance with the network structures. The intra-RAT handover is divided into intra-frequency and inter-frequency handover in accordance with the frequency points. The intra-RAT handover is also divided into intra -eNodeB, X2, and S1 handover in accordance with the LTE system interfaces.
This document describes the handover-related measurements, inter-RAT handover decision, and inter-RAT handover procedure, and focuses on enhanced CSFB and the RSCP&Ec/No based m obility management functions.
3.1
Overview
3.1
Overview
LTE servi
LTE services are classified as data and ces are classified as data and vovoice serice ser vvicices. es. For daFor data serta ser vicevices, the inter-RATs, the inter-RAT interoperability feature includes handover, CCO, and redirection, which can be triggered interoperability feature includes handover, CCO, and redirection, which can be triggered based on measurement, load, or blind handover. For voice services, the inter-RAT based on measurement, load, or blind handover. For voice services, the inter-RAT interoperability feature includes SRVCC and CSFB. The SRVCC is triggered based on interoperability feature includes SRVCC and CSFB. The SRVCC is triggered based on the inter-R
the inter-RAAT B1T B1/B2 measurement /B2 measurement reporreport. The blind CSFB or met. The blind CSFB or me asurasurementement -b-basedased CSFB can b
CSFB can be used.e used.
3.2
3.2
RSCP
RSCP &
& Ec/
Ec/N
No
o Based
Based Mobil
Mobility
ity Management
Management
For a handover from LTE to UMTS, if the RSCP and Ec/No of the target cell do not For a handover from LTE to UMTS, if the RSCP and Ec/No of the target cell do not change in the same way, an incorrect handover decision may be made. Therefore, the change in the same way, an incorrect handover decision may be made. Therefore, the mixed measurement mechanism of UMTS is added to the R10 version. The eNodeB mixed measurement mechanism of UMTS is added to the R10 version. The eNodeB specifies that UEs report both RSCP and Ec/No in measurement reports. When the two specifies that UEs report both RSCP and Ec/No in measurement reports. When the two measureme
measurement items are nt items are reporeported, the rted, the eNodeB consideeNodeB conside rs both ors both of them and f them and selectselect s ans an appropriate UMTS target cell
appropriate UMTS target cell for hfor handand over.over.
3.3
3.3
Service
Service Based
Based H
Handover
andover
Voice services are different from data services. For example, users are sensitive to voice Voice services are different from data services. For example, users are sensitive to voice services while data services have a buffering feature. Operators hope that different services while data services have a buffering feature. Operators hope that different handover thresholds are specified for voice and data services. In the current version, the handover thresholds are specified for voice and data services. In the current version, the inter-RAT A2 and B2 measurements are delivered based on the service type (voice or inter-RAT A2 and B2 measurements are delivered based on the service type (voice or data service)
data service)..
4
4
Technical Description
Technical
Description
4.1
Measurement
4.1
Measurement
After a UE acc
After a UE acc esses esses the sythe system, stem, the eNodeB the eNodeB delivers delivers the methe measuremeasureme nt connt con figfiguratiouratio n ton to the UE through the RRC connection reconfigurati
The handover-related measurement configuration is delivered in the following five The handover-related measurement configuration is delivered in the following five scenarios:
scenarios:
OnlOnly thy the e neighbor neighbor cells cells with with the the same frsame frequency eequency exist.xist. a)
a) For For initial ainitial accccess, the ess, the eNodeB eNodeB delivers delivers a a mmeasurement (easurement (A3/A5 event) A3/A5 event) forfor intra-frequency handover. If the redirection switch is turned on, and there intra-frequency handover. If the redirection switch is turned on, and there is an available different frequency or inter-RAT frequency, the eNodeB is an available different frequency or inter-RAT frequency, the eNodeB also delivers the A2 measurement for redirection.
also delivers the A2 measurement for redirection. b)
b) If If the eNodeB the eNodeB rereceives thceives the e intraintra -fre-frequency measurement quency measurement reporreport, it t, it makesmakes a handover decision, and originates handover. If not, go to the next step. a handover decision, and originates handover. If not, go to the next step.
c)
c) If If ththe e eNodeB reNodeB receieceives ves ththe e A2 A2 measuremmeasurem ent ent report freport for or redirecredirection, tion, itit performs blind redirection in accordance with Section 4.6.
performs blind redirection in accordance with Section 4.6.
Only Only the the inter-frequinter-frequ ency ency neighbor neighbor cells cells existexist.. a)
a) For For initial initial accesaccess, s, the the eNodeB eNodeB delivers delivers the the A2 A2 measurememeasurement font for r openiopeningng inter
inter-frequency -frequency measuremmeasuremeent.nt. b)
b) AfteAfter r receiving receiving the A2 the A2 measurement measurement report for report for opening opening inter-frequencyinter-frequency measurement, the eNodeB delivers a measurement (A3/A5 event) for measurement, the eNodeB delivers a measurement (A3/A5 event) for inter-frequency handover, opens Gap, delivers the A1 measurement for inter-frequency handover, opens Gap, delivers the A1 measurement for closing inter-frequency measurement, and deletes the A2 measurement closing inter-frequency measurement, and deletes the A2 measurement for opening inter-frequency measurement. If the UE redirection switch is for opening inter-frequency measurement. If the UE redirection switch is turned on, and there is an available redirection frequency, the eNodeB turned on, and there is an available redirection frequency, the eNodeB delivers the A2 measurement for redirection. Go to the next step.
delivers the A2 measurement for redirection. Go to the next step. c)
c) If If the eNothe eNodeB rdeB receives eceives the the interinter -fr-frequency meaequency measurement rsurement report, eport, it it makesmakes a handover decision, and originates handover. If not, go to the next step. a handover decision, and originates handover. If not, go to the next step. d)
d) If If the eNodeB rthe eNodeB receives the A2 eceives the A2 measurement report measurement report for for redirectionredirection, it, it performs blind redirection in accordance with Section 4.6. If not, go to the performs blind redirection in accordance with Section 4.6. If not, go to the next step.
next step. e)
e) After After receiving receiving the the A1 meA1 measuasurement rement reprep ort, ort, the the eNeNodeB odeB deletes the deletes the A1A1 measurement configuration, closes Gap, and deletes the inter-frequency measurement configuration, closes Gap, and deletes the inter-frequency
handover measurement configuration. If the A2 measurement handover measurement configuration. If the A2 measurement configuration for redirection exists, the eNodeB deletes it, and delivers configuration for redirection exists, the eNodeB deletes it, and delivers the A2 measurement for opening inter-frequency measurement, that the A2 measurement for opening inter-frequency measurement, that mean
means the es the e NodeB returns to a) status.NodeB returns to a) status.
Only Only the the inter-RAinter-RAT T neighbor neighbor cells cells existexist.. a)
a) For For initial initial accesaccess, s, the the eNodeB eNodeB delivers the delivers the A2 A2 measurememeasurement fnt for or openiopeningng inter
inter-RAT -RAT measurement.measurement. b)
b) AfteAfter recer receiving iving the A2 mthe A2 measurement easurement report for report for opening inopening intter-Rer-RATAT measurement, the eNodeB delivers a measurement (B2/B1 event) for measurement, the eNodeB delivers a measurement (B2/B1 event) for inter-RAT handover, opens Gap, delivers the A1 measurement for inter-RAT handover, opens Gap, delivers the A1 measurement for closing inter-RAT measurement, and deletes the A2 measurement for closing inter-RAT measurement, and deletes the A2 measurement for opening inter-RAT measurement. If the UE redirection switch is turned on, opening inter-RAT measurement. If the UE redirection switch is turned on, and there is an available redirection frequency, the eNodeB delivers the and there is an available redirection frequency, the eNodeB delivers the A2 measu
A2 measurement for redirrement for redir ection.ection. c)
c) If If the the eNoeNodeB deB receirecei ves ves the the inter-RAinter-RA T T handovehandover r measuremmeasurem ent ent reporeport, rt, itit makes a handover decision, and originates handover. If not, go to the makes a handover decision, and originates handover. If not, go to the next step.
next step. d)
d) If If ththe e eNodeB reNodeB receieceives ves ththe e A2 A2 measuremmeasurem ent ent report freport for or redirecredirection, tion, itit performs blind redirection in accordance with Section 4.6. If not, go to the performs blind redirection in accordance with Section 4.6. If not, go to the next step.
next step.
e)
e) After After receiving receiving the the A1 meA1 measuasurement rement repreport, ort, the the eNeNodeB odeB deletes deletes the the A1A1 measurement configuration, closes Gap, and deletes the inter-RAT measurement configuration, closes Gap, and deletes the inter-RAT handover measurement configuration. If the A2 measurement handover measurement configuration. If the A2 measurement configuration for redirection exists
configuration for redirection exists , , the eNthe eNodeB deletes it, and dodeB deletes it, and delieli ververss the A2 measurement for opening inter-RAT measurement, that means the A2 measurement for opening inter-RAT measurement, that means the eNodeB returns to a) status.
the eNodeB returns to a) status.
Inter-frequency Inter-frequency and and inter-RAT inter-RAT neighbor neighbor cells cells existexist, , andand interFandInterR interFandInterR is set to 0 is set to 0 (d
a) For initial access , the eNodeB delivers the bigger one (called initial A2 measurement) of the A2 measurements for opening inter-frequency measurement and inter-RAT measurement.
b) After recei ving the initial A2 measurem ent report, the eNode B delivers the measurement configuration (A3/A5 event) for inter-frequency handover and measurement configuration (B2/B1 event) for inter-RAT handover, opens Gap, delivers the A1 measurement for closing inter-frequency and inter-RAT measurement, and deletes the initial A2 measurement. If the UE redirection switch is turned on, and there is an available redirection frequency, the eNodeB delivers the A2 measurement for redirection. Go to the next s tep.
c) If the eNodeB receives the inter -frequency measurement report, it makes a handover decision, and originates handover. If not, go to the next step. d) If the eNodeB recei ves the inter-RA T handove r measurem ent report, it
makes a handover decision, and originates handover. If not, go to the next step.
e) If the eNodeB receives the A2 measurem ent report for redirection, it performs blind redirection in accordance with Section 4.6. If not, go t o the next step.
f) After receiving the A1 measurem ent report, the eNodeB deletes the A1 measurement configuration, closes Gap, and deletes the inter-frequency and inter-RAT handover measurement configuration. If the A2 measurement configuration for redirection exists, the eNodeB deletes it, and delivers the initial A2 measurement, that mea ns the eNodeB returns to a) status.
Inter-frequency and inter-RAT neighbor cells exist, and interFandInterR is set to 1 (delivering the inter-frequency measurement first, and then the inter-RAT measurement).
a) For initial access, the eNodeB delivers the A2 measurement for opening inter-frequency measurement.
b) After recei ving the A2 measurement for opening inter-frequency measurement, the eNodeB delivers the measurement configuration (A3/A5 e vent) for inter-frequency ha ndover, deletes the A2 measurement for opening inter-frequency measurement, delivers the A2 measurement (B2/B1 event) for opening inter-RAT measurement, opens Gap, and delivers the A1 measurement for closing inter-frequency and inter-RAT measurement. Go to the next step.
c) If the eNodeB receives the inter -frequency measurement report, it makes a handover decision, and originates handover. If not, go to the next step. d) If the eNodeB receives the A1 measurement report, it deletes the
measurement configuration for inter-frequency handover and A2 measurement for opening inter-RAT measurement, and delivers the A2 measurement for opening inter-frequency measurement, that means the eNodeB returns to a) status. If not, go to the next step.
e) If the eNodeB recei ves the A2 measurem ent report for opening inter-RAT measurement, it delivers the measurement configuration (B2/B1 event) for inter-RAT handover, and deletes the A2 measurement for opening inter-RAT measurement. If the UE redirection switch is turned on, and there is an available redirection frequency, the eNodeB delivers the A2 measurement for redirection. Go to the next s tep.
f) If the eNodeB receives the measurem ent report for inter-RAT handover, it makes a handover decision, and originates handover. If not, go to the next step.
g) If the eNodeB receives the A2 measurem ent report for redirection, it performs blind redirection in accordance with Section 4.6. If not, go to the next step.
h) After receiving the A1 measurement report, the eNodeB deletes the A1 measurement configuration, closes Gap, and deletes the inter-frequency and inter-RAT handover measurement configuration. If the A2 measurement configuration for redirection exists, the eNodeB deletes it,
and delivers the A2 measurement for opening inter-frequency handover, that means the eNodeB returns to a) status.
Note: During the inte r-frequency or i nter-RAT measurement, if the UE ca pacity indicates that Gap is not needed, Gap will not be enabled.
4.2
LTE-to-UTRAN Handover Decision
After recei ving the UTRAN handover measurement report, the eNodeB makes a handover decision in accordance with the UE capacity and neighbor cell configuration. To perform PS HO, the following conditions should be met:
1. The UE supports UTRAN PS HO (FGI bit 8). 2. The UTRAN supports PS HO.
3. The neighbor cell relation supports HO.
If there are candidate cells that support PS HO in the measurement report, the eNodeB sorts them in accordance with radio quality, and originates inter-RAT handover from LTE to UTRAN in order.
4.3
LTE-to-GERAN Handover Decision
After recei ving the GERAN handover measurement report, the eNodeB makes a handover decision in accordance with the UE capacity and neighbor cell configuration. To perform CCO, the following condition should be met:
The UE supports CCO (FGI bit 10).
If there are candidate cells that support CCO in the measurement report, the eNodeB sorts them in accordance with channel quality, and originates inter-RAT handover from LTE to GERAN in order.
4.4
LTE CSFB with PS Handover Decision
At the initial stage of LTE network development, the core network does not have an IMS,
so the LTE network cannot provide voice services. In this case, voice services can be provided by inter-RAT neighbor cells through CSFB. When the eNodeB receives the INITIAL CONTEXT SETUP REQUEST message or UE CONTEXT MODIFICATION REQUEST message from the MME, in which CS Fallback Indicator IE is included, the eNodeB originates the CSFB flow. The CSFB includes two modes: blind CSFB and measurement based CSFB.
LTE CSFB to UTRAN
When a UE originates a voice service, the LTE system instructs the UE to perform PS HO, or redirect to the UTRAN system, which provides the voice service for the UE.
LTE CSFB to GERAN
When a UE originates a voice service, the LTE system instructs the UE to perform PS HO or CCO, or redirect to the GERAN system, which provides the voice service for the UE.
Note: The current version does not support PS HO from LTE to GERAN. The detailed flow is shown in the following figure.
UE
eNB
MME
Trigger CSFB Mobility（eNB Decides Handover or redirection）
IF Handover HANDOVER REQUIRED MobilityFromEUTRACommand IF Redirection RRCConnectionRelease RRCConnectionReconfiguration(B1/B2) RRCConnectionReconfigurationComplete
Extended Service Request
A、INITIAL CONTEXT SETUP REQUEST or B、UE
CONTEXT MODIFICATION REQUEST
INITIAL CO NTEXT SETUP RESPONSE RRCConnectionReconfiguration RRCConnectionReconfigurationComplete IF A Message . . .
UE CONTEXT RELEASE COMMAND
eNB Decides whether CSFB needs InterRat NeiborCell Measure
IF B and need measure
MeasurementReport
UE CONTEXT RELEASE REQUEST HANDOVER COMMAND
UE CONTEXT RELEASE COMMAND UE CONTEXT MODIFICATION RESPONSE
For detailed information about LTE CSFB, please refer to ZTE LTE FDD Voice Service CSFB Feature Guide.
4.5
Inter-RAT Handover
The E-UTRAN instructs the UE in RRC_connected state to hand over from E-UTRAN to UTRAN (through PS HO) or GERAN (through PS HO/CCO) by sending the MOBILITY FROM EUTRA COMMAND message (carrying Handover or CellChangeOrder I E).
Figure 4-2 Inter-RAT Hando ver
The inter-RA T hando ver procedure is as follows:
1. The eNodeB sends the HandoverRequired message to the MME. The MME interacts with other systems, and the target system establishes UE context.
2. After interacting with other systems, the MME sends the Handover Command message to the eNodeB.
3. The eNodeB sends the MobilityFromEutraCommand message to the UE, and the UE performs the random access procedure to access another sys tem.
4. After the UE hands over to the target system, the MME notifies the eNodeB to release the UE context.
4.6
Redirection
The UE mobility in connected state is fulfilled through PS HO, CCO, and redirection, which are performed in the followin g order:
PS HO > CCO > redirection UE eNB MME MeasurementReport HandoverRequired HandoverCommand MobilityFromEutraCommand UeContextReleaseCommand UeContextReleaseComplete
if the UE cannot perform PS HO or CCO, the eNodeB instructs it to redirect by sending the RRC CONNECTION RELEASE message that carries redirectedCarrierInfo IE. Redirection includes two modes: blind redirection and measurement based redirection.
Blind redirection
Figure 4-3 Blind Redirect ion
After recei ving the A2 measurem ent report for blind redirect ion, the eNodeB makes a blind redirection decision.
1. The eNodeB selects a system as the target sys tem. The target system must be supported by the UE, and its priority (ratPriorityPara) is the highest one and is not 0. 2. The eNodeB selects a frequency of the target sys tem as the target frequency. The target frequency must be supported by the UE, and its priority is the highest one and is not 0. If there is an available frequency, go to Step 4. If not, go to the next step.
3. If there is no available frequency in the target sys tem, the eNodeB selects another system as the target system. The target system must be supported by the UE, and its priority is the second highest one and is not 0. Go to Step 2.
4. The eNodeB sends the selected frequency to the UE.
UE CONTEXT RELEASE COMPLETE eNB
UE CONTEXT RELEASE COMMAND MME
UE CONTEXT RELE ASE REQUEST UE
MEASUREMENT REPORT
RRCCONNECTION RELEASE (A2 measurement report for redirection
Measurement based redirection
Figure 4-4 Measurem ent Based Redirection
Inter-frequency redirection
After recei ving the inter- frequ ency handover measurement report, the UE
redirects to the frequency indicated in the m easurement rep ort if the following conditions are met:
a) The UE does not support inter- frequency handove r, or (and) the neighbor cell does not sup port h andover, o r
b) The measurement report only includes unknown PCI, or
c) The measurem ent report includes unknown PCI, and all known PCI attempts fail, and
d) The measurement report does not include the cell that is limited by the handover limit list.
Inter-RAT redirection
UE CONTEXT RELEASE COMPLETE eNB
UE CONTEXT RELEASE COMMAND MME
UE CONTEXT RELEASE REQUEST UE
MEASUREMENT REPORT
RRCCONNECTION RELEASE
Measurement report for inter-frequency handover
Figure 4-5 Measurem ent Based Inter-RA T Redirection
After recei ving the inter- RAT handove r measurem ent report, the UE redirects
to the system and frequency indicated in the measurement report if the following conditions are met:
a) The UE does not support inter-RAT handover, or (and) the neighbor cell does not sup port handover, and
b) When the measurem ent report is GERAN, the UE does not support CCO, or
c) The measurement report only includes unknown PCI, or
d) The measurem ent report includes unknown PCI, and all known PCI attempts fail.
After recei ving the RRC CONNECTION RELEASE message that carries redirectedCarrierInfo IE, the UE redirects to the corresponding frequency of the corresponding system.
4.7
RSCP & Ec/No Based Mobility Management
In the inter-RAT B1/B2 measurement configuration of UTRAN-FDD, if ReportQuantity is set to both, the eNodeB will deliver reportQuantityUTRA-FDD-r10 in the measurement
UE CONTEXT RELEASE COMPLETE eNB
UE CONTEXT RELEASE COMMAND MME UE CONTEXT RELEASE REQUEST UE MEASUREMENT REPORT RRCCONNECTION RELEASE Measurement report for inter-RAT hando ver
configuration, instructing UEs to report both RSCP and Ec/No in measurement reports. When TriggerQuantity is CPICH_RSCP, and ReportQuantity is both, the eNodeB needs to sort the cells again in accordance with CPICH_EC/No. If both RSCP and Ec/No need to be reported in the inter-RAT B1/B2 measurement of UTRAN-FDD, the filtering coefficient of another ReportQuantity needs to be configured in the Layer-3 filtering coefficient in UTRAN measurement.
4.8
Service Based Handover
The int er-RAT A2 and B2 measurements are d elivered based on the service type (voice or data service). The measu rement mechanis m is as follows:
Before the A2/B2 measurement is delivered, it is necessary to check the current service type. If a voice service exists, the eNodeB needs to deliver the voice measurement. Otherwise, the eNodeB deliver the data measurement.
When a voice ser vice is established, the eNodeB needs to change the current data A2/B2 measurem ent to voice A2/B2 measurem ent. If t he UE is at the edge of th e cell, the above-mentioned measurement re-configuration can be triggered only when the di fference between the voice and data me asurement thresholds exceeds the re-configuration threshold.
When the voice ser vice is released, the eNodeB needs to change the current voice A2/B2 measureme nt to data A2/B2 measurement. If the UE is at the edge of the cell,
the above-mentioned measurement re-configuration can be triggered only when the difference between the voice and data measurement thresholds exceeds the re-configuration t hreshold.
5
Key Parameters and Configuration
5.1
Inter-RAT Operation Function
5.1.1
Parameters List
Table 5-1 Common Parameters List
SN Parameters Name (English) Figure
1 Neighbor Cell Configuration Figure 5-1
2 Neighbor Relation Configuration Figure 5-2
3 UTRAN-Frequency Number Figure 5-3
4 UTRAN-Frequency Measurement Configuration Figure 5-3
5 Duplex Mode Figure 5-3
6 Band Indicat or for FDD DL Freque ncy Figure 5-3
7 UTRAN FDD Frequency Figure 5-3
8 Band Indicat or for FDD DL Frequency Figure 5-3
9 UTRAN FDD Frequency Figure 5-3
10 GERAN- Frequency Number Figure 5-4
11 GERAN-Frequency Measurement Configuration Figure 5-4
12 The First ARFCN Value Figure 5-4
13 Band Indicati on Figure 5-4
14 GERAN Frequency Figure 5-4
15 The Number of Explicit ARFCN Figure 5-4
16 ARFCN Detailed List Figure 5-4
5.1.2
Parameters Configuration rule
Table 5-2 Parameters Configuration rule
SN Parameter
1
UTRAN-Fre quency Number
This parameter is used to present the UTRAN frequency number.
0-32 0
2 Duplex
Mode
This parameter is used to determine UTRAN duplex mode, FDD or TDD enum(FDD,FD D) FDD 3 Band Indicator for FDD DL Frequency
This parameter is used to configure the band
indicator for UTRAN downlink frequency. UTRA-FDD: enum(0:1,1:2,2 :3,3:4,4:5,5:6,6 :7,7:8,8:9,9:10, 10:11,11:12,12 :13,13:14,14:1 9,16:20,15:21, 17:22,18:25,19 :26) UTRA-FDD: enum （0:a,1:b,2:c,3 :d,4:e,5:f ） UTRA-FDD:1[0] UTRAN-FDD: a[0]
ZTE Confidential Proprietary © 2015 ZTE CORPORATION. All rights reserved. 19 4 UTRAN FDD Frequency
This parameter is used to configure the UTRAN central frequ ency.
UTRA-FDD: (I:2112.4-2167 .6, II:1932.4-1987. 6, III:1807.4-1877 .6, IV:2112.4-215 2.6, V:871.4-891.6, VI:877.4-882.6 ,VII:2622.4-26 87.6, VIII:927.4-957.6, IX:1847.4-187 7.4, X:2112.4-2167 .6, XI:1478.4-149 3.4, XII:731.4-743. 6, XIII:748.4-753. 6, XIV:760.4-765. 6, XIX:877.4-887. 6,XX:793.4-81 8.6,XXI:1498.4 -1508.4,XXII:35 12.4-3587.6,X XV:1932.4-199 2.6,XXVI:861.4 -891.6)MHZ,st ep 0.2MHZ UTRA-FDD: (a:1900-1920, 2010-2025,b:1 850-1910,1930 -1990,c:1910-1930,d:2570-2 UTRA-FDD:2140 UTRAN-FDD:191 0
5
GERAN-Frequency Number
The parameter indicates the numbers of GERAN Frequency Group. The GERAN carrier
frequencies are organized in groups and the cell reselection parameters are provided per group of GERAN carrier frequencies. 0-16 0 6 The First ARFCN Value
This parameter is used to configure the first ARFCN of GERAN neighbor cell
0-1023 0
7 Band
Indication
This parameter indicates how to interpret an
associated GERAN carrier ARFCN. More s pecifically,
the IE indicates the GERAN frequency band in case the ARFCN value can concern either a DCS 1800 or a PCS 1900 carrier frequency. For ARFCN values not
associated with one of these bands, the indicator has no meaning. enum （GSM900,EX T900,R-GSM, DCS1800, PCS1900,GS M850） GSM900
8 GERAN Frequency
This parameter is used to configure the GERAN system measurement frequency. {geranBand== 0}[1..124] step 1,{geranBand= =1}[0..124][97 5..1023] step 1,{geranBand= =2}[0..124][95 5..1023] step 1,{geranBand= =3}[512..885] step 1,{geranBand= =4}[512..810] step 1,{geranBand= =5}[128..251] step 1 {geranBand==0}[1 ],{geranBand==1}[ 0],{geranBand==2 }[0],{geranBand== 3}[512],{geranBan d==4}[512],{geran Band==5}[128] 9 The number of Explicit ARFCN
This parameter is used to configure the detailed ARFCN number o f
GERAN.
0-31 0
10 ARFCN
detailed list
This parameter is used to configure the detail list of ARFCN. The group
number is the same as the GERAN carrier frequency number, the effective value number of each group equal to the detail ARFCN number.
0-1023 0
5.1.3
Parameters Configuration Procedure
5.1.3.1
Function Activation
1. Inter-RAT Neighbor Cell parameter configuration:
In the Configuration Management window on the EMS or OMMB, select Modify Area > Radio Parameter > LTE FDD > Neighbor Cell Configuration > UTRAN
FDD Neighbor Cell or Modify Area > Radio Parameter > LTE FDD > Neighbor Cell Configuration > GSM Neighbor Cell, configure the parameter, see Figure 5-1.
Figure 5-1 Configure Inter-RAT Neighbor Cell Paramet ers
UTRAN FDD Neighbor Cell Configuration
2. Inter-RAT Neighbor Relation parameter configuration:
In the Configuration Management window on the EMS or OMMB, select Modify Area > Radio Parameter > LTE FDD > Neighbor Relation Configuration > UTRAN Neighbor Relation or Modify Area > Radio Parameter > LTE FDD > Neighbor Relation Configuration > GSM Neighbor Relation , configure the parameters, see Figure 5-2.
Figure 5-2 Configure Inter-RAT Neighbor Relation Paramet ers
UTRAN Neighbor Relation Configuration
GERAN Neighbor Relation Configuration
3. Configure Measurement Parameters for UTRAN:
Select Modify Area> Radio Parameter > LTE FDD > E-UTRAN FDD Cell >Measureme nt Parameter ,configure the parameters, see Figure 5-3.
Figure 5-3 Configure Measurement Parameters for UTRAN
4. Configure Measurement Parameters for GERAN:
Select Modify Area> Radio Parameter > LTE FDD > E-UTRAN FDD Cell >Measureme nt Parameter ,configure the parameters, see Figure 5-4.
Figure 5-4 Configure Measurement Parameters for GERAN
5.1.3.2
Other Parameters Configuration
QXDM configuration on UE
Set the access mode of UE. Click View, the NV Brow ser window is displayed. Select 00010 Digital/Analog Mode Preference, see Figure 5-5.
Figure 5-5 UE Access Mode Configuration
5.1.3.3
Data Synchronization
1. After modified the parameters, click to save all the data.
2. Select [Configuration Management->Data Synchronization ] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, then click Synchronize button.
5.1.3.4
Function Deactivation
No.
5.2
Inter-RAT Redirection Function
5.2.1
Parameters List
Table 5-3 Paramet ers List
1 Redirection Algorith m for Coverage Figure 5-6
2 RAT Priority Figure 5-7
3 UTRAN Frequency Redirect ion Priority Figure 5-8 4 GERAN Frequency Redirection Priority Figure 5-9
5.2.2
Parameters Configuration rule
Table 5-4 Parameters Configuration rule
SN Parameters
Name Description
Value
Range Default Value
1
Redirection Algorithm for
Coverage
This is a switch for the algorithm applied for coverage bas ed redirect.
0:Close,1:O
pen Open[1]
2 RAT Priority
The parameter defines a array with size seven ,they're responded to the priority of EUTRA-FDD、EUTRA-TDD、 GERAN、UTRA-FDD、
UTRA-TDD、
CDMA2000-HRPD and CDMA2000-1xRTT . The priority value range of each RAT is from 0 to 255. Bigger value means higher priority. The value "0" means no cells exist in this RAT.
0-255 [254,255,0,0,0,0 ,0]
3
UTRAN Frequency Redirection Priority
This array indicates the priority of candidate
frequencies for Redirection target. eNB selects the target frequency based on this information. The value range of each integer array member is from 0 to 255. A higher value indicates a higher priority. The default value 0 means the co rresponding frequency cannot be selected as redirection target frequency. 0-255 0 4 GERAN Frequency Redirection Priority
This array indicates the priority of candidate
frequencies for Redirection target. eNB selects the target frequency based on this information. The value range of each integer array member is from 0 to 255. A higher value indicates a higher priority. The default value 0 means the co rresponding frequency cannot be selected as redirection target
frequency.
0-255 0
5.2.3
Parameters Configuration Procedure
5.2.3.1
Function Activation
1. Redirection Algorithm for coverage parameter configuration:
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell . Click button to modify the parameter, Click to save the configuration. See Figure 5-6.
Figure 5-6 Switch Configuration of Redirection
2. RAT Priority configuration:
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell> Measurement Parameter, Click button to modify the parameter, Click to save the configuration. See Figure 5 -7.
Figure 5-7 RAT Priority Configuration
3. UTRAN Frequency Redirection Priority Configuration:
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell> Measurement Parameter, Click button to modify the parameter, Click to save the configuration. See Figure 5 -8.
4. GERAN Frequency Redirection Priority Configuration:
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell> Measurement Parameter, Click button to modify the parameter, Click to save the configuration. See Figure 5 -9.
Figure 5-9 UTRAN Frequency Redirect ion Priority Configuration
5.2.3.2
Other Parameters Configuration
Please refer to 5.1.3.2
5.2.3.3
Data Synchronization
Please refer to 5.1.3.3.
5.2.3.4
Function Deactivation
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell . Click button to modify Redirection Algorithm for Coverage to be Close, Click to save the configuration. See In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell> Measurement Parameter, Click button to modify the parameter, Click to save the configuration. See Figu re 5 -8.
.
5.3
Inter-RAT PS HO Function
5.3.1
Parameters List
Table 5-5 Inter-RAT PS HO Paramete rs List
SN Parameter Name(English) Figure
1 UTRAN neighbor cell supported PS HO Figure 5-1 2 PS HO supporte d by GERAN neighbor cell Figure 5-1
3 Handover supported Figure 5-2
5.3.2
Parameters Configuration rule
Table 5-6 Inter-RAT PS HO Paramete rs Configuration rule
SN Paramete
rs Name Description Value Range Default Value
1 UTRAN neighbor cell supported PS HO PS HO capability for
UTRAN-FDD neighbor cell. When UTRAN-FDD neighbor cell support the capability. Service cell can trigger PS handover.
enum(No,
2 PS HO supported by GERAN neighbor cell
The parameter indicates PS HO capability for GSM neighbor cell. When GSMD neighbor cell support the capability. Service cell can trigger PS handover.
enum(No,
Yes). Yes
3 Handover
supported
handover indication whether Server cell can handover to UTRAN neighboring cell
0: Not Support；
1:Support 1
4 Handover
supported
handover indication whether Server cell can handover to GSM neighboring cell
0: Not Support；
1:Support
1
5.3.3
Parameters Configuration Procedure
5.3.3.1
Function activation
1. In
2. In the Configuration Manag ement windo w on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell> Measurement Parameter, Click button to modify the parameter, Click to save the configuration. See Figure 5 -8.
3. , click button, configure UTRAN neighbor cell supported PS HO and PS HO supported by GE RAN neighbor cell to Yes.
4. In
5. In the Configuration Manag ement windo w on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell> Measurement Parameter, Click button to modify the parameter, Click to save the configuration. See Figure 5 -8.
6. , click button, click button, configure Handover supported to Support.
5.3.3.2
Other Parameters Configuration
1. Please refer to chapter 5.1.3.2;
2. UE Capability Information: When UE attach, examine UE capability In UE Capability Information. Se e Figure5-10. Whe n the bit 8 and th e bit 22 both e qual to 1, UE supports PS HO to UTRAN; When the bit 9 and the bit 2. both equal to 1.UE supports PS HO to GERAN.
Figure 5-10 UE Capability Information
5.3.3.3
Data Synchronization
Please refer to c hapt er 5.1.3.3.
5.3.3.4
Function Deactivation
5.4
CCO Function
5.4.1
Parameters List
Please refer to table 5-1, the sn of the parameters is 1,2,10~16.
5.4.2
Parameters Configuration rule
Please refer to table 5-2.
5.4.3
Parameters Configuration Procedure
5.4.3.1
Function Activation
Please refer to GERAN Related parameters configuration in chapter 5.1.3.1.
5.4.3.2
Other Parameters Configuration
1. Please refer to chapter 5.1.3.2.
2. UE Capability Information: When UE attaches and examines UE capability in UE Capability Information. See Figure5-11. When the bit 10 and the bit 230both equal to 1, UE supports CCO to GERAN.
Figure 5-11 UE Capability Information
5.4.3.3
Data Synchronization
Please refer to chapter 5.1.3.3.
5.4.3.4
Function Deactivation
No.
5.5
CSFB Function
5.5.1
Parameters List
Table 5-7 Paramet ers List
SN Parameter Name(English) Figure
1 Inter-RAT neighbor relation Figure5-2
2 CSFB Method of UTRAN Figure 5-12
3 CSFB Method of GSM Figure 5-12
4 Switch for CS Fallback Based Measurement Figure 5-12 5 Target system of Idle Ue for CS Fallback Figure5-1 3
6 Target system of Connected Ue for CS Fallback Figure5-1 4
7 UTRAN Frequency CSFB Priority Figure5-15
8 GERAN Frequency CSFB Priority Figure5-16
9 Switch for CS Fallback base LAI Figure5-17
10 Multi-PLMN local strategy for CSFB Figure5-17
5.5.2
Parameters Configuration rule
Table 5-8 Parameters Configuration rule
SN Paramete
rs Name Description Value Range Default Value
1
Inter-RAT neighbor relation
The parameter indicates the location relation between server cell and
UTRAN(GERAN) neighboring cell 0 neighboring; 1 same coverage; 2 Containing; 3 Contained 0: neighboring 2 CSFB Method of UTRAN
This parameter indicates the prefer method of CS fallback to UTRAN. The default Priority configuration is that PS HO > Redirection. When the Lower priority Configuration is set on OMC, Higher priority will not be considered. 0:PS Handover, 1:Redirection PS Handover[0] 3 CSFB Method of GSM
This parameter indicates the prefer method of CS fallback to GSM. The
default Priority configuration is that PS HO >
CCO>Redirection. When the Lower priority
Configuration is set on OMC, Higher priority will not be considered.
0:PS Handover, 1:CCO,
2:Redirection
4 Target system of Idle Ue for CS Fallback
This array indicates the priority of candidate RATs for CS Fallback. eNB selects the target RAT based on this information. From the first array
member, each denotes the corresponding priority of GERAN, UTRA-FDD, UTRA-TDD, and CDMA2000-1xRTT respectively. The value range of each integer array member is from 0 to 255. A higher value indicates a higher priority. The default value 0 means there is no applicable neighbor cell for the corresponding RAT. Each non-isolated serving cell shall be configured with the redirect RAT priority for the corresponding
neighboring cell(s).
5 Target system of Connected Ue for CS Fallback
This array indicates the priority of candidate RATs for CS Fallback. eNB selects the target RAT based on this information. From the first array
member, each denotes the corresponding priority of GERAN, UTRA-FDD, UTRA-TDD, and CDMA2000-1xRTT respectively. The value range of each integer array member is from 0 to 255. A higher value indicates a higher priority. The default value 0 means there is no applicable neighbor cell for the corresponding RAT. Each non-isolated serving cell shall be configured with the redirect RAT priority for the corresponding neighboring c ell(s). 0-255 [0,100,0,0] 6 Switch for CS Fallback Based Measurem ent
The parameter is a switch to control whether or not
performing CSFB measurement.
[0:No,
7
UTRAN Frequency CSFB Priority
This array indicates the priority of candidate frequencies for CSFB target. eNB selects the target frequency based on this information. The value range of each integer array member is from 0 to 255. A higher value indicates a higher priority. The default value 0 means the
corresponding frequency cannot be selected as CSFB target frequency. 0-255 0 8 GERAN Frequency CSFB Priority
This array indicates the priority of candidate frequencies for CSFB target. eNB selects the target frequency based on this information. The value range of each integer array member is from 0 to 255. A higher value indicates a higher priority. The default value 0 means the
corresponding frequency cannot be selected as CSFB target frequency. 0-255 0 9 Switch for CS Fallback base LAI If ucCSFBbaseLAI equal to 1,then PLMN indicated in Register ALI will priority to other candidate PLMNs； If ucCSFBbaseLAI equal to 0, then PLMN indicated in Register ALI will not priority to other candidate PLMNs；
0:{Close},
10 Multi-PLM N local strategy for CSFB If ucMultiPLMNLocStofCSFB equal to 0,then Multi-PLMN local strategy for CSFB will not be effective；
I If
ucMultiPLMNLocStofCSFB equal to 1, then Multi-PLMN local strategy for CSFB will be effective; And, the operator can configure different local strategy of CSFB for different PLMN.
0: {Close},
1: {Open} Close
5.5.3
Parameters Configuration Procedure
5.5.3.1
Function Activation
1. Inter-RAT Neighbo r Relation parameter configuration: See Figu re5-2, configure Inter-RAT neighbor relation.
2. Configure the switch for CS Fallback based measurement and Method of CSFB:
i. In the Configuration Management window on the EMS or OMMB, clic k Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter, click the button.
ii. If Switch for CS Fallback Based Measurement is set to No[0], a blind CSFB procedure will be performed. If Switch for CS Fallback Based Measurement is set to Yes[1], a CSFB based on measurement procedure will be performed, see
iii. For CSFB to UTRAN, Set CSFB Method of UTRAN to PS Handover[0] or Redirection[1] based on actual CSFB procedures to be test. For CSFB to GSM, Set CSFB Method of GSM to PS Handover[0], CCO[1] or Redirection[2] based on actual CSFB procedures to be test , see
iv. Click to save the configuratio n.
错误 未找到引用源 .
Figure 5-12 Configuration of CSFB Based Measurem ent Switch and Method of CSFB
2. Configure target system of idle UE for CS Fallback paramete r:
i. In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter , click the button.
ii. If CSFB procedure test base on UE in RRC-IDLE state, click
behind the Target System of Idle Ue for CS Fallback parameter, then Target System of Idle Ue for CS Fallback tab opens, set GERAN Target System of Idle Ue for CS Fallback and UTRAN-FDD Target System of Idle Ue for CS Fallback to non-zero value. A higher value indicates a higher priority. If the priority is set to 0, the related system is not considered for CSFB. See
iii. Click to save the configuratio n.
Figure 5-13 CSFB Target System Priority Configuration for UE in RRC_IDLE state
3. Configure target system of Connecte d UE for CS Fallback parameter:
i. In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FD D > E- UTRAN F DD Cell > Measurement
Parameter, click the button.
ii. If CSFB proced ure test base on UE in RRC-CONNECTED state, click behind the Target sy stem of Connected Ue for CS Fall back parameter, then Target System of Connected Ue for CS Fallback tab opens, set GERAN Target System of Connected Ue for CS Fallback and UTRAN-FDD Target System of Connected Ue for CS Fallback to non-zero value. A higher value indicates a higher priority. If the priority is set to 0, the related system is not considered for CSFB. See Figure 5-14.
Figure 5-14 CSFB Target System Priority Configuration for UE in RRC_CON NECTED state
2. UTRAN Frequency CSFB Priority Configuration:
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter . Click the button to configure UTRAN Frequency CSFB Priority. See Figure 5-15.
3. GERAN Frequency CSFB Priority Configuration:
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter . Click the button to configure GERAN Frequency CSFB Priority. See Figure 5-16.
Figure 5-16 GERAN Frequency CSFB Priority Configuration
4. Switch for CS Fallback base LAI and Multi-PLMN local strategy for CSFB Configuration:
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > Measurement Parameter . Click the button to modify the parameters. See Figure 5-17.
Figure 5-17 Switch for CS Fallback base LAI and Multi-PLMN local strategy for CSFB
5. local strategy for Multi-PLMN Configuration:
In the Configuration Management window on the EMS or OMMB, click Modify Area > Radio Parameter > LTE FDD >E-UTRAN Service Configuration> local strategy for Multi-PLMN, see Figure 5-18 for configuring local strategy paramet ers of Multi-PLMN.
5.5.3.2
Other Parameters Configuration
1. Please refer to chapter 5.1.3.2.
2. Set UE to support CS domain and PS domain. Click View, the NV Browser window is displayed. Select 00850 Service Domain Preference. In Fields, select 0x2 CS PS, see Figure 5-19.
Call Manager : Simulat e a call by using Call Manager.
Parameter configurations in Call Manager: Click View, the Call Manager window is displayed, see Figure 5-20. If the call is Mobile Originated, click Start. If the call is Mobile Terminated, it is automatically established.
The MO call is established from the UE in LTE to the UE in 3G or 2G communication system.
Figure 5-20 Call Manager Usage
5.5.3.3
Data Synchronization
Please refer to chapter 5.1.3.3.
5.5.3.4
Function Deactivation
5.6
Inter-RAT Load Balancing Function
5.6.1
Parameters List
Table 5-9 Paramet ers List
SN Parameter Name(English) Figure
1 Inter-RAT neighbor relation Figure5-2
2 Load Management Switch of Load Balancing
Algorithm Figure 5-21
3 Inter-freq/RAT Camp Load Balancing Switch Figure 5-21
4 Switch of Cell Load Log Figure 5-21
5 Load Balancing RAT Priority Figure 5-21
6 Threshold of intra-LTE neighbor cell in overload
state in uplink Figure 5-21
7 Threshold of intra-LTE neighbor cell in overload
state in downlink Figure 5-21
8 Threshold to Execute ZTE PRB Load Balancing in
Uplink Figure 5-21
9 Threshold to Execute ZTE PRB Load Balancing in
Downlink Figure 5-21
10 Threshold to Execute Inter-freq/RAT Camp Load
Balancing Figure 5-21
11 Number of Frequency to Modify Cell reselection
Priority Figure 5-21
12 Threshold of Inter-RAT Neighbor Cell in Overload
State in Uplink Figure 5-21
13 Threshold of Inter-RAT Neighbor Cell in Overload
5.6.2
Parameters Configuration rule
Table 5-10 Parameters Configuration rule
SN Paramete
rs Name Description Value Range Default Value
1
Inter-RAT neighbor relation
The parameter indicates the location relation between server cell and UTRAN(GERAN) neighboring cell 0 neighboring; 1 same coverage; 2 Containing; 3 Contained 0: neighboring 2 Load Managem ent Switch of Load Balancing Algorithm
Switch of load balancing algorithm in load
management, which determine whether load balancing al gorithm is valid or not. Scheme of blind handover or scheme based on measurement of event can be selected.
0:Close, 1:Open Close 3 Inter-freq/ RAT Camp Load Balancing Switch Switch of inter-freq/RAT Camp Load Balancing, which can determine
whether the inter-freq/RAT Camp Load Balancing function is performed or not. 0: Close 1: General Strategy, 2: WCP Strategy Close 4 Switch of Cell Load Log
This switch determine whether output cell load log.
0: Close
