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For Internal Use Only▲
Technical Document
Document Title: ZXWN-CS NITZ Feature Guide
Author: Wang Wenjun, Mao Rong
ZTE Corporation
ZTE Confidential Proprietary
NITZ Feature Guide For Internal Use Only▲
Table of Contents
1 Preface.................................................................................................................................................................5
2 Terminology and Abbreviations.........................................................................................................................5
2.1 Terminology...............................................................................................................................................5
2.2 Abbreviations.............................................................................................................................................5
3 Function Description..........................................................................................................................................5
3.1 Function.....................................................................................................................................................5
3.2 Reference Standards and Protocols............................................................................................................6
3.3 Description of Networking Mode and Application Scenario.....................................................................6
3.3.1 Application Scenario 6
3.3.2 Benefits 6
3.3.3 Use Restriction 7
3.4 Function Principle......................................................................................................................................7
3.4.1 Service Flow 7
3.4.2 Change of External Interface 8
3.4.3 Function Principle 9
4 Function Interaction.........................................................................................................................................11
4.1 Interaction with the Virtual MSC Server..................................................................................................11
4.2 Interaction with Original Implementation................................................................................................11
4.3 Compatible with Original Implementation in Engineering Upgrade........................................................11
5 Configuration Requirements...........................................................................................................................12
6 Configuration Description................................................................................................................................12
6.1 Configuration Preconditions....................................................................................................................12
6.2 Correlation Modification.........................................................................................................................12
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6.3 New Configuration Item..........................................................................................................................15
6.4 Data Configurations under Various Networking Conditions....................................................................15
7 O&M Description.............................................................................................................................................23
7.1 Security Variables....................................................................................................................................23
7.2 Timer........................................................................................................................................................23
7.3 Performance Statistics..............................................................................................................................23
7.4 Alarm/Notice............................................................................................................................................24
7.5 Failure Observation..................................................................................................................................24
7.6 Service Observation/Dynamic Management............................................................................................24
7.7 Billing......................................................................................................................................................24
7.8 Maintenance Commands and Operations.................................................................................................25
7.9 Requirements on Other NEs....................................................................................................................25
7.10 Precautions.............................................................................................................................................25
7.11 FAQs......................................................................................................................................................25
8 Function Verification Cases................................................................................................................................25
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Revision Record
Prepared by/
Changed byDate Version
Description
(Main Points)
Wang Wenjun 2009-2-5 V1.0
Note 1: Fill in this form for each change after this document is finalized.
Note 2: Fill None in the Reason and Description columns for files archived for the first time.
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1 Preface
This document describes the overview, networking application scenarios, principle, function
interaction, and data configurations of NITZ function for pre-sales and after-sales personnel.
This document is the most important reference for pre-sales and after-sales personnel to
promote this function to operators.
2 Terminology and Abbreviations
2.1 Terminology
None
2.2 Abbreviations
3GPP: 3rd Generation Partnership Project
MSCS: Mobile Switching Centre Server
NITZ: Network Identity and Timezone
LTZ: Local Time Zone
3 Function Description
3.1 Function
The NITZ function is originated by the VLR to inform the user of the following information:
Network identity (NI)
Daylight saving time (DST)
Time and time zone
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This function can deliver different NITZ indications based on different virtual MSC and
IMSI number segments. For example, if there is more than one (virtual) operator in the same
network and the (virtual) operators have different NIs, this function is needed. NI display
supports blank space. Blank space can be in the front, middle, or end of the NI. NI can even
be just a blank space. Also, MSC Server supports NI and TZ information to control sending
scenarios separately. Sending scenarios for NI and TZ are the same, including no sending,
sending when the terminal registers to the network for the first time, sending when the
terminal moves to another time zone, sending when the network changes the time zone,
sending when the network changes the NI, and sending when the terminal originates the
access in the network. The control policy is as follows:
Virtual
MSC
Index
IMSI
Range
NI
Sending
Scenario
TZ
Sending
Scenario
Long NI
of the
Network
Short NI
of the
Network
Whether to
Inform the
User of the
Network
Time
Whether to
Prefix the
Abbreviation of
Country Name to
the NI
…..
IMSI number segment analysis supports the co-existence of both long and short numbers,
and long numbers prevail. If the IMSI field is set to All FF, it indicates that all IMSI number
segments should be fully matched.
3.2 Reference Standards and Protocols
[1] 3GPP TS 22.042 V6.0.0
[1] 3GPP TS 23.038 V6.1.0
[3] 3GPP TS 24.008 V6.6.0
[2] 3GPP TS 29.018 V6.4.0
3.3 Description of Networking Mode and Application Scenario
3.3.1 Application Scenario
No special requirements.
3.3.2 Benefits
For operators: where there is more than one (virtual) operator in the same network and
the (virtual) operators have different NIs, this function can provide users with proper
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NIs based on their IMSIs. When the operator is trans-regional, this function can provide
users with proper NIs based on different areas.
For end users: it brings convenience to users by providing them with proper NI and
time information.
3.3.3 Use Restriction
Only one time zone is supported within one physical MSC Server.
As actual applications prove, time zone should be configured in network establishment
and cannot be changed in running. If it is changed in running time, many issues (such
as billing) are involved. Therefore, for the time zone change of the network, this
function processes only the handovers between DST and winter time system.
3.4 Function Principle
3.4.1 Service Flow
3.4.1.1 User Location Update
Figure 1 Location Update Flow
1. The MS sends the LocationUpdate_Request message to the MSCS.
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The MSCS completes the authentication and then originates the location update request
to the HLR.
2. The HLR inserts the user data to the MSCS and then sends the MSCS the message
indicating that the location update is complete.
3. After receiving UpdateLocation_Cnf, the MSCS processes the NITZ function if user
access is allowed. When NITZ is required to be sent to the MS, the MSCS sends MM
INFORMATION to the MS. Then the MSC sends the location update acceptance
message to the MS.
Note: If the MS does not support the MM INFORMAITON message, the message will be neglected, and the
MM STATUS will be returned to the MSCS with the cause value #97. After receiving MM STATUS, the
MSCS discards the message without processing.
3.4.1.2 Call/SMS/USSD/Supplementary Service/ LCS Access Flow
Figure 1 Call/SMS/USSD/Supplementary Service/ LCS Access Flow
1. The MS sends CmSrvReq requesting for MMS connection. The MSCS processes the
access process.
2. When the access flow is complete, the MSCS processes the NITZ function. If NITZ is
required to be sent to the MS, the MSCS sends MM INFORMATION to the MS. Then
the MSCS sends CmSrvAcc to the MS.
Note: if the MS does not support the MM INFORMAITON message, the message will be neglected, and the
MM STATUS will be returned to the MSCS with the cause value #97. After receiving MM STATUS, the
MSCS discards the message without processing.
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3.4.2 Change of External Interface
None.
3.4.3 Function Principle
When the user changes the NI or time zone information, the data is synchronized to the OMP
of the MSC Server and is delivered by the OMP to the CMP where the VLR is located. In
the CMP, the VLR analyzes whether the condition for triggering the NITZ is satisfied when
the user accesses the network. If satisfied, the VLR will send MM INFORMATION to the
user. During the sending, the VLR needs to determine whether to use the Iu/A or Gs
interface according to the user’s access. Therefore, the VLR is in the core position of the
NITZ function.
Support multiple time zones or not
When the user LTZ changes, the NITZ function can send MM INFORMATION to the UE.
But due to the current function limitation, only one time zone is supported within one
physical MSC Server; therefore, the NTZ checks whether the LTZ changes only when the
inter-office location update occurs, and then sends the corresponding MM INFORMATION.
Similarly, for the dual homing of mutual standby and N+1, the multiple standby office
locations should be in the same time zone.
User Location Update/Call/SMS/USSD/Supplementary Service/ LCS Access Flow
1. The user originates access for location update/call/SMS/USSD/supplementary
service/LCS service.
2. The VLR obtains the virtual MSCID based on the user’s LAI. The VLR then matches
the NITZ configuration based on the virtual MSCID and IMSI. The IMSI supports the
co-existence of both long and short numbers, and the long number should prevail.
Matching process: if the IMSI number segment matching is failed in the virtual MSC
configuration (long and short numbers are mismatching), the virtual MSC index is set
to 0 and global matching is configured based on the NITZ of the IMSI; if the matching
is still failed, the user IMSI field is be set to all FF according to the virtual MSC index
in the input parameters, and the default NITZ configuration of the virtual MSC is
obtained through matching; if the matching is still failed, the virtual MSC=0, IMSI
field is All-FF in the default global configuration; if the NITZ still cannot be obtained,
the MSC Server does not send NITZ.
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3. The VLR obtains the NITZ assignment policy, in which the sending scenarios of NI
and TZ can be set respectively. When it is required to send the TZ, to prevent the wrong
MSC Server time from interfering with the terminal time, set whether to inform the
user of the network time in the NITZ function. If yes, the MSC Server fills in the Net
Time And Zone field; otherwise, the MSC Server fills in the Net Time Zone field.
4. If the VLR determines that it is required to send NITZ to the UE/MS based on the
scenario in the assignment policy, the VLR continues to determine whether it is
combined location update. If yes, the VLR sends MM INFORMATION to the UE/MS
via the Gs interface through the SGSN. Otherwise, the VLR sends MM
INFORMATION to the UE/MS via the Iu/A interface.
5. If the UE/MS does not support MM INFORMAITON, the message will be neglected,
and the MM STATUS will be returned to the core network with the cause value #97.
6. After receiving MM STATUS, the MSC Server discards the message without
processing.
The network changes its time zone
As actual applications prove, time zone should be configured in network
establishment and cannot be changed in running. If it is changed in running
time, many issues (such as billing) are involved. Therefore, this function
processes only the handovers between DST and winter time system.
1. The maintenance personnel configure whether to use the DST, DST effective time, and
time offset in the global data configuration of MSC Server. The offset time can be set to
+1 hour (Note 1). The maintenance personnel then synchronize the data.
2. If the condition for user access process is satisfied and the TZ sending scenario is set to
“sending when the network time zone changes”, the MM information message is sent to
the user when DST switch is performed between the last access time and this access
time.
Note 1: Although +0.5 is applied in some areas, the 3GPP protocol does not support +0. Therefore, this
offset cannot be sent to the UE.
The network changes its NI.
1. The maintenance personnel change the NI configured in the NITZ configuration,
including long NI or long identity coding method of the local network, or short NI or
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short identity coding method of the local network. The maintenance personnel then
synchronize the data.
2. The VLR marks that all users of the virtual MSCID may be informed of NITZ in the
network access. Moreover, the MSC Server records the change time of the
corresponding virtual MSCID NI.
3. If the user who meets the access condition accesses the network for the first time and
the NI sending scenario is set to “sending when the network changes the NI”, the VLR
sends MM INFORMATION to the UE/MS.
4. If the VLR that meets the condition exists in the user access network and the NI
sending scenario is set to “sending when the network changes the NI”, the MM
information message is sent to the user only when the user access time is before the NI
change time. After the MM information message is sent to the user, the MSC Server
reaches the purpose of sending only one MM information message to the user by
changing the user access time.
4 Function Interaction
4.1 Interaction with the Virtual MSC Server
The virtual MSC Server is one of the multiple virtual MSC Servers within the physical MSC
Server. Each virtual MSC Server has its unique service feature and routing method. In the
NITZ function, each virtual MSC Server is configured with a different NITZ property, and
different NIs are allowed. However, the time zone and DST configurations of all virtual
MSC Servers should be the same.
4.2 Interaction with Original Implementation
This function expands and fully integrates with the original implementation. This function
does not conflict with the original Implementation.
4.3 Compatible with Original Implementation in Engineering Upgrade
The NITZ optimization function adds the IMSI parameter in the NITZ configuration. In the
upgrade, the IMSI field in the original record sheet is set to all FF, and default NITZ
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configurations of virtual MSCs are reserved. The following describes the methods for
upgrading the configuration sheets.
NITZ
Command Name
\\Service Configuration\NITZ Configuration\NITZ
Command Description
Add the IMSI parameter;
Change the original NITZ Message Sending Scenario to NI Sending Scenario;
Add TZ Sending Scenario. Its value is the same as in NI Sending Scenario;
Change Whether to Inform the User of Network Time in NITZ Function to Whether to Inform the
User of Network Time in TZ Delivery.
Parameter Description
IMSI is all-FFF by default, indicating that all IMSI number segments are fully matched.
Upgrade Description
After the upgrade, the IMSI field is set to the default value.
The NI Sending Scenario value is the same as that of the original NITZ Message Sending Scenario.
The TZ Sending Scenario value is the same as that of the original NITZ Message Sending Scenario.
5 Configuration Requirements
This function supports 255 IMSI number segments.
6 Configuration Description
6.1 Configuration Preconditions
Before configuring the function: complete the following configurations:
1. Location update data configuration
2. Data configuration of services, such as call, SMS, USSD, independent call, and LCS.
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6.2 Correlation Modification
Configuration item 1: NITZ. In the NITZ configuration under the service configuration,
NITZ Message Sending Scenario is changed to NI Sending Scenario; TZ Sending
Scenario is added; Whether to Inform the User of Network Time in NITZ Function is
changed to Whether to Inform the User of Network Time in TZ Delivery; IMSI Prefix is
added, and NITZ sending scenario can be matched based on the IMSI prefix. Other
configuration items are not changed.
Changed
Parameter NameOriginal Meaning Current Meaning Impact
NI Sending
Scenario
It indicates that the
NITZ configures the
sending scenario at
the same.
It indicates that the NITZ configures NI
sending scenario separately. There are five
scenarios: when the network changes its
time zone, when the terminal moves to
another time zone, when the network
changes its N, when the terminal registers
to the network for the first time, and the
terminal originates the access process in the
network.
TZ Sending
Scenario
It indicates that the
NITZ configures the
sending scenario at
the same.
It indicates that the NITZ configures TZ
sending scenario separately. There are five
scenarios: when the network changes its
time zone, when the terminal moves to
another time zone; when the network
changes its NI, when the terminal registers
to the network for the first time, and the
terminal originates the access process in the
network.
Whether to Inform
the User of
Network Time in
TZ Delivery
It indicates whether to
inform the user of
network time in NITZ
function.
It indicates whether to inform the user of
network time in TZ delivery.
IMSI Prefix NoneNI or TZ sending scenario is matched based
on the IMSI prefix.
Other configuration items:
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Parameter Name MeaningValue
Range
Filling
Description
(Recommended
Value)
ImpactRelated
Protocol
Virtual MSC Index
It is used to configure the
specified virtual MSC
index.
0-65535 0NITZ
configuration
Whether to Prefix
the Abbreviation of
Country Name to
the NI
It configures whether to
prefix the NI with the
abbreviation of country
name.
Yes or No NoNITZ
configuration
Long NI of the
NetworkIt configures the long NI.
0 - 208
characters None
NITZ
configuration
Long ID Coding
Method
It configures the coding
method of long ID.
“BIT7” or
“UCS2”None
NITZ
configuration
Short ID of the
NetworkIt configures the short NI.
0 - 208
characters None
NITZ
configuration
Short ID Coding
Method
It configures the coding
method of short ID.
“BIT7” or
“UCS2”None
NITZ
configuration
Configuration item 2: time zone information of global configuration. It is under the global
configuration of the equipment configuration. It is used to configure the time zone of this
office.
Parameter Name Meaning Value Range
Filling
Description
(Recommended
Value)
ImpactRelated
Protocol
Time Zone
It indicates the
related time zone
of this office.
-12-+131 None
Time zone of
global
configuration
Configuration item 3: Set the DST information. It is under the global configuration of the
equipment configuration. It is used to configure DST start time, end time, and step size.
1
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Parameter Name Meaning Value Range
Filling
Description
(Recommended
Value)
ImpactRelated
Protocol
DST Start and End
Time
It configures DST
start and end time.
State date, start
time, end date, and
end time
The date format is
MM-DD and the
time format is
HH:MM.
DST
information
setting
DST Step SizeIt configures DST
step size.0 or 1
0: disable DST
1: enable DST.
The offset time is
+1 hour.
DST
information
setting
Configuration item 4: multiple time zones configuration. It is in the NTIZ function
configuration of the service configuration. It is used to configure the time zone of an
adjacent office.
Parameter Name Meaning Value Range
Filling
Description
(Recommended
Value)
ImpactRelated
Protocol
MSC Number of
Adjacent Office
It indicates the
MSC number of an
adjacent office.
None None
Multiple
time zones
configuration
Time Zone
It indicates the time
zone information of
the corresponding
adjacent office.
GMT-00:00 -
GMT+00:15None
Multiple
time zones
configuration
6.3 New Configuration Item
None
6.4 Data Configurations under Various Networking Conditions
The network management version in the captured figures here is CSV3.07.40.P3.B3.
1. The NI and TZ sending scenario is that the terminal registers to the network for the first
time.
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1) Check that there is no record of the user in the R-MS sheet.
2) Under the MSCS\Service Configuration\NITZ Function Configuration, set the
NITZ sending scenario to the scenario in which the terminal registers with the
network for the first time.
ADD
NITZ:VMSCIDX=0,IMSI="FFFFFFFFFFFFFFF",SCENENI="REGIST",SCENE
TZ="REGIST",SENDTM=YES,ADDCNY=YES,LNAME="operator",LNAMEC
ODE=BIT7,SNAME="operator",SNAMECODE=BIT7;
3) Select the content to be sent in the NITZ configuration.
4) The user originates the location update or access process. Check whether the
signaling tracking MM INFO message is consistent with the configuration.
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2. The NI and TZ sending scenario is that the terminal moves to another time zone.
1) Under the MSCS\service configuration\NITZ function configuration, set the NITZ
sending scenario to the scenario in which the terminal moves to another time zone.
ADD
NITZ:VMSCIDX=0,IMSI="FFFFFFFFFFFFFFF",SCENENI="ENTERNEWLTZ
",SCENETZ="ENTERNEWLTZ",SENDTM=NO,ADDCNY=YES,LNAME="ope
rator",LNAMECODE=BIT7,SNAME="operator",SNAMECODE=BIT7;
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2) Under the MSCS\Equipment Configuration\Global Configuration, configure the
time zone of this office.
SET TZ:TZ=GMT+08:00;
3) This service needs the user to update VLR location. In the MSCS\Access
Configuration\Location Area Configuration, configure the location area
information of the original location zone, which should associate with the MSC
Code of the adjacent office.
ADD
LAI:LAC="0146",ID=146,NAME="146BSC",MCC="460",MNC="02",MSC="86
13903023",VLR="8613903023",LOCNUM="01",ECCIDX=0,BSC="0",RNC="0"
,TPDAS=0,BELONG=NO_MSC,WDMID=0;
4) Under the MSCS\Service Configuration\NITZ Function Configuration, configure
the time zone of the adjacent office.
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ADD TIMEDIFF:MSC="8613903023",TIMEZONE=GMT+01:00;
5) The user originates the VLR location update. Check whether the signaling tracking
MM INFO message is consistent with the configuration.
3. The NI and TZ sending scenario is the one in which the network changes its time zone.
1) Under the MSCS\service configuration\NITZ function configuration, set the NITZ
sending scenario to the scenario in which the network changes its time zone.
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ADD
NITZ:VMSCIDX=0,IMSI="FFFFFFFFFFFFFFF",SCENENI="DSTCHG",SCEN
ETZ="DSTCHG",SENDTM=YES,ADDCNY=YES,LNAME="operator",LNAM
ECODE=BIT7,SNAME="operator",SNAMECODE=BIT7;
2) Under the MSCS\Dev Configuration\Global Data Configuration, configure DST
start time, end time, and step size. Note: The DST start time and end time cannot
be on the same day.
SET DAYLIGHTSAVE:DAYLIGHTSAVE="07-03"-"11:38"-"07-
04"-"18:00",OFFSET=1;
3) The user originates the location update or access process. Ensure that the time
when the user originates the location update is after the DST start or end time. If
the DST period is set to 1, when the DST is switched, confirm that the foreground
time changes by 1 hour and check whether the signaling tracking MM INFO
message is consistent with the configuration.
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4. The NI and TZ sending scenario is the one in which the network changes its NI.
1) Under the MSCS\service configuration\NITZ function configuration, set the NITZ
sending scenario to the scenario in which the network changes its NI.
ADD
NITZ:VMSCIDX=0,IMSI="FFFFFFFFFFFFFFF",SCENENI="NMCHG",SCENE
TZ="NMCHG",SENDTM=YES,ADDCNY=YES,LNAME="operator",LNAMEC
ODE=BIT7,SNAME="operator",SNAMECODE=BIT7;
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2) Change the NI or coding method, or set the NI length to null. The user then
originates the location update or access process. Check whether the signaling
tracking MM INFO message is consistent with the configuration.
SET
NITZ:VMSCIDX=0,IMSI="FFFFFFFFFFFFFFF",SCENENI="NMCHG",SCEN
ETZ="NMCHG",LNAME="cmcc",LNAMECODE=BIT7,SNAME="cmcc",SNA
MECODE=BIT7;
This configuration sets NI to cmcc.
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5. The NI and TZ sending scenario is the one in which the terminal accesses the network.
1) Under the MSCS\service configuration\NITZ function configuration, configure the
NITZ sending scenario to the scenario that the terminal accesses the network.
ADD
NITZ:VMSCIDX=0,IMSI="FFFFFFFFFFFFFFF",SCENENI="UEACCESS",SC
ENETZ="UEACCESS",SENDTM=YES,ADDCNY=YES,LNAME="operator",L
NAMECODE=BIT7,SNAME="operator",SNAMECODE=BIT7;
2) The user originates the location update or access process. Check whether the
signaling tracking MM INFO message is consistent with the configuration.
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7 O&M Description
7.1 Security Variables
None
7.2 Timer
None
7.3 Performance Statistics
Serial No. 42002
Measurement type Related information of NITZ measurement
Measurement item NITZ Measurement
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Abbreviation of the
measurement item
(database field name)
CN_P_MSCSNITZDATA
DescriptionMeasure respectively the total times and failed times of sending the Mm info
through the BBS and RNC in the public domain.
Trigger point None
Object of statistics None
Collection method None
Accumulation method None
Unit None
Remarks None
Serial No. 42003
Measurement type Related information of the virtual MSC NITZ measurement
Measurement item Virtual NITZ Measurement
Abbreviation of the
Measurement Item
(database field name)
CN_P_MSCSVNITZDATA
DescriptionMeasure respectively the total times and failed times of sending the Mm info
through the BBS and RNC in the virtual MSCs.
Trigger point None
Object of Statistics None
Collection method None
Accumulation method None
Unit None
Remarks None
7.4 Alarm/Notice
None
7.5 Failure Observation
None
7.6 Service Observation/Dynamic Management
None
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7.7 Billing
None
7.8 Maintenance Commands and Operations
None
7.9 Requirements on Other NEs
It requires mobile phones to support this function.
7.10 Precautions
1. The time in the Signaling Tracking Time Zone and Time field is in GMT; the signaling
tracking message is printed after the change of the time zone.
2. In the location update or access process, if the MM info message is sent with the
obtained IMEI or CheckIMEI closed or encrypted, the service model will release the
corresponding process data area; if the mobile phone receives the message
unsuccessfully and responds with the network, the network does not process this
problem and this situation is not counted as failed sending.
3. NI and TZ scenarios can be set respectively.
7.11 FAQs
None
8 Function Verification Cases
Preconditions
1. The system runs normally and all office directions can be reached normally.
2. The NI and time zone data are set.
3. Call loss and signaling tracking are enabled.
Test procedure
1. The NI and TZ function is set to enable When the terminal accesses the
network, and set the sending scenarios based on the actual condition.
2. The terminal originates the location update (including authentication,
encryption, and TMSI reallocation process).
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Expected results
1. The location update is successful without any call loss.
2. The signaling tracking can decode correctly the MM Information message, in
which the parameter is the same as the configuration.
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