Cell ID

A GSM Cell ID (CID) is a generally unique number used to identify each base transceiver station (BTS) or sector of a BTS within a location area code (LAC) if not within a GSM network.

In some cases the first or last digit of CID represents cells' Sector ID:

In UMTS, there is a distinction between Cell ID (CID) and UTRAN Cell ID (also called LCID). The UTRAN Cell ID (LCID) is a concatenation of the RNC-ID (12 bits, ID of the Radio Network Controller) and Cell ID (16 bits, unique ID of the Cell). CID is just the Cell ID. The concatenation of both will still be unique but can be confusing in some cellid databases as some store the CID and other store LCID. It makes sense to record them separately as the RNC ID is the same for many cells, the unique element is the CID[1][2]

A valid CID ranges from 0 to 65535 (216 − 1) on GSM and CDMA networks and from 0 to 268435455 (228 − 1) on UMTS and LTE networks.[3]

Cell ID databases and services

A number of commercial and public Cell ID databases and services are available:

Name Unique cells Countries (MCC) Operators (MNC) Measurements Free database download Active project Data license Comment
Cellspotting.com 0.1 million[4] 667 no CC0
Combain Mobile – combain.com >84 million[5] 240 >1700 >40 billion no yes Supports GSM, CDMA, UMTS, LTE and Wi-Fi (>1.2B Wi-Fis) via API.[6]
Combain Mobile Global CellID Coverage Map
Mozilla Location Service 28.2 million[7] 240[8] 2.7 billion[7] yes[9] yes[7] Based on crowd-sourced data. Also WiFi database. Cooperating with OpenCelliD[9] and Combain.[10]
LocationAPI.org – Unwired Labs 111 million[11] 240 1712 25 billion no yes Supports WiFi, GSM, CDMA, UMTS and LTE technologies via its API.
Unwired Labs LocationAPI Global Coverage Map
[12]
Mylnikov GEO[13] >34 million 505 3500 yes yes Contains data from radiocells.org, OpenCellID and MLS.
Navizon[14] 71 million 239 1712 22 billion no yes Based on crowd-sourced data. Also WiFi database.[15]
NetMeterProject.com 0.2 million 77 174 10 million limited; private use only no [16] Only a small portion of the database can be downloaded and for private use only: the measurements where the crowd users accepted the "Creative Commons Namensnennung-Nicht-kommerziell-Weitergabe unter gleichen Bedingungen 3.0 Deutschland" license
radiocells.org[17] 0.7 million 94 243 yes yes CC-BY-SA 3.0 Based on crowd-sourced data.
OpenCellID by Unwired Labs[18] 8 million 242 1914 1.4 billion yes yes CC-BY-SA 3.0
OpenCellID database growth monthly
Based on crowd-sourced data; free API key required for database download; Service is now maintained by Unwired Labs.[19][20]
OpenSignal[21] 0.8 million 825 5.2 billion no yes
WiGLE[22] 6.2 million no yes
CellMapper
OpenMobileNetwork
G-NetWold by Gyokov Solutions
Skyhook Wireless
Google Location Services[23]
Apple Location Services[24]
Microsoft Location Services[25]

See also

References

  1. ↑ https://stackoverflow.com/questions/7240038/utran-cell-identity-returned-by-getcid
  2. ↑ "3GPP TS" (PDF). www.etsi.org. Retrieved 26 June 2015.
  3. ↑ "Cell Networks". Retrieved 21 September 2015.
  4. ↑ "CellSpotting Stats". Retrieved 2016-03-29.
  5. ↑ "Combain Mobile". Retrieved 2017-04-24.
  6. ↑ "Combain Mobile Coverage Maps". Retrieved 2017-04-24.
  7. 1 2 3 "Statistics - Mozilla Location Service". Retrieved 2016-03-29.
  8. ↑ "Per Country Cell Statistics - Mozilla Location Service". Retrieved 2016-03-29.
  9. 1 2 "Cell Download - Mozilla Location Service". Retrieved 2015-01-30.
  10. ↑ "Combain Deal Helps Expand Mozilla Location Service". Retrieved 2015-04-09.
  11. ↑ "Unwired Labs LocationAPI". Retrieved 2016-03-29.
  12. ↑ "Unwired Labs Coverage Map". Retrieved 2016-03-29.
  13. ↑ "Stats Mylnikov GEO Cells". Retrieved 2016-03-29.
  14. ↑ "Navizon Global Positioning System". Retrieved 2016-03-29.
  15. ↑ "Navizon Cellular Coverage Map". Retrieved 2016-03-29.
  16. ↑ "Board NetMeterProject". Retrieved 2016-03-29.
  17. ↑ "radiocells.org". Retrieved 2016-03-29.
  18. ↑ "opencellid.org Realtime Statistics". Retrieved 2015-08-30.
  19. ↑ "OpenCellID wiki". Retrieved 2017-03-02.
  20. ↑ "Unwired Labs and ENAiKOON Announce Transfer of Maintainership for OpenCellID - Press Release - Digital Journal". www.digitaljournal.com. Retrieved 2017-08-03.
  21. ↑ "Stats OpenSignalMap". Retrieved 2014-09-06.
  22. ↑ "Stats WiGLE". Retrieved 2016-03-29.
  23. ↑ "Google Location Service in Mozilla Firefox Privacy Policy". Google Inc. Retrieved 2016-09-30.
  24. ↑ "About Location Services and Privacy". Apple Inc. Retrieved 2016-09-30.
  25. ↑ "Windows Runtime APIs - Windows.Devices.Geolocation namespace". Microsoft Corp. Retrieved 2016-09-30.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.