NITZ: Difference between revisions
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'''NITZ''', or '''Network Identity and Time Zone''',<ref name="3gpp">{{cite web |url=http://www.3gpp.org/ftp/Specs/html-info/22042.htm |title=Network Identity and TimeZone (NITZ); Service description; Stage 1 |author=3GPP TSG SA WG1—Services |date=12 September 2012 |website=3rd Generation Partnership Project (3GPP) |publisher=3GPP |series=Release 11 |accessdate=27 November 2013}}</ref> is a mechanism for provisioning local [[Time of day|time]] and date, [[Time_zone|time zone]] and [[Daylight_saving_time|DST]] offset, as well as network provider identity information, to mobile devices via a wireless network.<ref>http://www.freshpatents.com/Network-identity-and-timezone--nitz--functionality-for-non-3gpp-devices-dt20080207ptan20080032736.php</ref> |
'''NITZ''', or '''Network Identity and Time Zone''',<ref name="3gpp">{{cite web |url=http://www.3gpp.org/ftp/Specs/html-info/22042.htm |title=Network Identity and TimeZone (NITZ); Service description; Stage 1 |author=3GPP TSG SA WG1—Services |date=12 September 2012 |website=3rd Generation Partnership Project (3GPP) |publisher=3GPP |series=Release 11 |accessdate=27 November 2013}}</ref> is a mechanism for provisioning local [[Time of day|time]] and date, [[Time_zone|time zone]] and [[Daylight_saving_time|DST]] offset, as well as network provider identity information, to mobile devices via a wireless network.<ref>http://www.freshpatents.com/Network-identity-and-timezone--nitz--functionality-for-non-3gpp-devices-dt20080207ptan20080032736.php</ref> |
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NITZ has been an optional part of the official [[GSM]] standard since phase 2+ release 96.<ref>http://ftp.3gpp.org/tsg_sa/TSG_SA/TSGS_04/Docs/PDF/sp-99330.pdf</ref> |
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NITZ is often used to automatically update the system clock of mobile phones. |
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In terms of standards and other timing or network access protocols such as [[Network Time Protocol|NTP]] or [[CDMA2000]], the quality and enforcement of NITZ is weak. This standard allows the network to "transfer its current identity, universal time, DST and LTZ"<ref name="3gpp" /> but each is optional, and support across [[Radio access network|RAN]] vendor and operator varies. This presents a problem for device manufacturers, who are required to maintain a complex timezone database, rather than rely on the network operator. Additionally, unlike [[3GPP2]], which transmits [[GPS]]-sourced, millisecond resolution time via the sync channel, for NITZ, the "accuracy of the time information is in the order of minutes.".<ref name="3gpp" /> |
In terms of standards and other timing or network access protocols such as [[Network Time Protocol|NTP]] or [[CDMA2000]], the quality and enforcement of NITZ is weak. This standard allows the network to "transfer its current identity, universal time, DST and LTZ"<ref name="3gpp" /> but each is optional, and support across [[Radio access network|RAN]] vendor and operator varies. This presents a problem for device manufacturers, who are required to maintain a complex timezone database, rather than rely on the network operator. Additionally, unlike [[3GPP2]], which transmits [[GPS]]-sourced, millisecond resolution time via the sync channel, for NITZ, the "accuracy of the time information is in the order of minutes.".<ref name="3gpp" /> |
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Revision as of 23:43, 29 April 2015
NITZ, or Network Identity and Time Zone,[1] is a mechanism for provisioning local time and date, time zone and DST offset, as well as network provider identity information, to mobile devices via a wireless network.[2]
NITZ has been an optional part of the official GSM standard since phase 2+ release 96.[3]
NITZ is often used to automatically update the system clock of mobile phones.
In terms of standards and other timing or network access protocols such as NTP or CDMA2000, the quality and enforcement of NITZ is weak. This standard allows the network to "transfer its current identity, universal time, DST and LTZ"[1] but each is optional, and support across RAN vendor and operator varies. This presents a problem for device manufacturers, who are required to maintain a complex timezone database, rather than rely on the network operator. Additionally, unlike 3GPP2, which transmits GPS-sourced, millisecond resolution time via the sync channel, for NITZ, the "accuracy of the time information is in the order of minutes.".[1]
Carriers supporting NITZ
Initial list derived from ref[4]:
| Country | Carrier | NITZ available since | Notes |
|---|---|---|---|
 Australia |
Optus | ? | |
| Australia |
Telstra | ? | |
| Australia |
Drei | ? | |
 Canada |
Rogers | ? | |
| Canada |
SaskTel | ? | |
 China |
China Mobile | ? | |
 Czech Republic |
Telefónica O2 | ? | |
| Czech Republic |
T-Mobile | ? | |
| Czech Republic |
Vodafone | ? | |
 Germany |
Telefónica O2 | 2009 | ref[5][6] |
| Germany |
E-Plus | 2015 | ref[7] |
 Hong Kong |
PCCW | ? | |
| Hong Kong |
SmarTone | ? | |
 Hungary |
T-Mobile | ? | |
 Italy |
Wind | ? | |
 Malaysia |
U Mobile | ? | |
 Mexico |
Telcel | ? | |
 Netherlands |
KPN | ? | |
| Netherlands |
Vodafone | ? | |
 New Zealand |
2degrees | ? | |
| New Zealand |
Spark New Zealand | ? | |
| New Zealand |
Vodafone | ? | |
 Nigeria |
MTN | ? | |
 Poland |
T-Mobile | ? | 2G and 3G |
| Poland |
P4 Play | ? | 3G only |
| Poland |
Plus (telecommunications Poland) | ? | 2G and 3G |
| Poland |
Aero2 | ? | 2G and 3G |
 Romania |
Zapp | ? | |
| Romania |
Orange | ? | 3G only |
 Russia |
MTS | ? | |
 Sweden |
TeliaSonera | ? | |
| Sweden |
Telenor | ? | |
 Switzerland |
Sunrise | ? | |
| Switzerland |
Swisscom | ? | |
| Switzerland |
Orange | ? | |
 Turkey |
Turkcell | ? | |
| Turkey |
Vodafone | ? | |
 Taiwan |
Chunghwa Telecom | ? | |
 United Kingdom |
Telefónica O2 | ? | |
| United Kingdom |
Vodafone | ? | ref[8] |
 USA |
AT&T | ? | |
| USA |
T-Mobile | ? | |
 Norway |
<ALL> | - | |
| Turkey |
Avea | - | ref[9] |
| Australia |
Vodafone | - | |
| China |
China Unicom | - | |
| Poland |
Plus | - | |
| Germany |
Telekom | - | |
| Germany |
Vodafone | - | |
 Japan |
SoftBank | - | |
 Belgium |
Mobistar | - | |
| Belgium |
Proximus | - | |
| Mexico |
Movistar | - | |
| Netherlands |
T-Mobile | - | |
| Sweden |
Tele2 | - | |
| Sweden |
3 | - | |
| United Kingdom |
EE (telecommunications company) | - | |
 India |
BSNL | - |
References
- ^ a b c 3GPP TSG SA WG1—Services (12 September 2012). "Network Identity and TimeZone (NITZ); Service description; Stage 1". 3rd Generation Partnership Project (3GPP). Release 11. 3GPP. Retrieved 27 November 2013.
{{cite web}}: CS1 maint: numeric names: authors list (link) - ^ http://www.freshpatents.com/Network-identity-and-timezone--nitz--functionality-for-non-3gpp-devices-dt20080207ptan20080032736.php
- ^ http://ftp.3gpp.org/tsg_sa/TSG_SA/TSGS_04/Docs/PDF/sp-99330.pdf
- ^ http://www.howardforums.com/archive/topic/1030372-1.html [dead link]
- ^ http://www.teltarif.de/o2-startet-automatische-zeitanpassung/news/36669.html
- ^ http://www.android-hilfe.de/samsung-galaxy/7717-automatische-uhr-im-o2-netz.html
- ^ http://www.teltarif.de/e-plus-uhrzeit-netzwerkzeit/news/59267.html
- ^ http://youprotect.co.uk/personal-alarms/medilarm-pro
- ^ http://www.sikayetvar.com/sikayet/detay/2031591/avea-otomatik-saat-guncellemesi-yapmiyor