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History[ edit ] The Rich Communication Suite industry initiative  was formed by a group of industry promoters in This section needs additional citations for verification.
Wi-Fi[ edit ] Crowdsourced Wi-Fi data can also be used to identify a handset's location. However, in United States v.
This results from the roaming procedures that perform hand-over of the phone from one base station to another. In some instances, law enforcement may even access a mobile phone's internal microphone to eavesdrop on conversations while the phone is switched off.
Frequently the compulsion associated with a legislative framework, such as Enhancedis required before a service provider will deploy a solution. Both types of data are thus used by the telephone to make the location more accurate i.
Pen Registerregarding government tracking of individuals. Universal Profile RCS has had one release, and currently has one scheduled: This is usually performed independent from the carrier.
Each release expanded the scope of its predecessor. Newer phones may also allow the tracking of the phone even when turned on and not active in a telephone call.
One of the key challenges of network-based techniques is the requirement to work closely with the service provider, as it entails the installation of hardware and software within the operator's infrastructure.
Another difficulty would be to address the issue of foreign handsets that are roaming in the network.
Privacy[ edit ] Locating or positioning touches upon delicate privacy issues, since it enables someone to check where a person is without the person's consent. Hybrid[ edit ] Hybrid positioning systems use a combination of network-based and handset-based technologies for location determination.
The Federal Communications Commission's regulatory implementation C. For example, it may not be possible to obtain any raw measurements from the handset directly, yet still obtain measurements via the SIM.
Other means make use of the antenna pattern, which supports angular determination and phase discrimination.
GSM localization uses multilateration to determine the location of GSM mobile phones, or dedicated trackers, usually with the intent to locate the user. As the phone changes location, the antenna towers monitor the signal, and the phone is "roamed" to an adjacent tower as appropriate.
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