Network Identity and Time Zone
Network Identity and Time Zone ( also NITZ ) is a cellular network function that provides the universal time , the date and information on whether daylight saving time applies to end devices via the cellular network. This is an optional part of the official GSM standard in its version 2+ in the form of publication 96.
NITZ is used to automatically update the time on mobile devices. It also allows the transmission of a long and a short network identifier, which are displayed by the end device. All of these components are optional.
Compared to other services
Compared to other services that provide a current time or date, such as the Network Time Protocol in IP networks or time transmissions in cellular networks according to CDMA2000 , NITZ is used very little in GSM networks. The standard allows the telecommunications provider u. a. to transmit the identity and the time, each element being optional and the transmission being different depending on the telecommunications provider and network.
In contrast to 3GPP2 , which provides GPS- based time information in milliseconds, NITZ only has an accuracy of one minute.
Trivia
On January 28, 2016, the Telefónica Deutschland Holding network provided a time delayed by 10 minutes in its own network.
Availability from telecommunications providers
| country | providers | possibly network | Availability (year) | source |
|---|---|---|---|---|
 Germany
|
Telefónica | O2 | Yes (2009) | |
|
Germany
|
Telefónica | E-plus | Yes (2015) | |
 Switzerland
|
Sunrise | Yes | ||
|
Switzerland
|
Swisscom | Yes | ||
|
Switzerland
|
Salt | Yes | ||
|
Germany
|
Telecom | No | ||
|
Germany
|
Vodafone | No |
Individual evidence
- ↑ a b 3GPP TSG SA WG1 — Services: Network Identity and TimeZone (NITZ); Service description; Stage 1 . 3GPP. 2012.09.12. Retrieved on 01/29/2016.
- ↑ Archived copy ( Memento of the original from February 17, 2012 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ↑ http://ftp.3gpp.org/tsg_sa/TSG_SA/TSGS_04/Docs/PDF/sp-99330.pdf
- ↑ Wrong time in the O2 and E-Plus network. In: Golem.de . January 29, 2016. Retrieved January 29, 2016 .
- ↑ http://www.teltarif.de/o2-startet-automatische-zeitanstellung/news/36669.html
- ↑ http://www.teltarif.de/e-plus-uhrzeit-netzwerkzeit/news/59267.html
