Documentation by Jie CAI.
Some companies and their products which use MLP:
Locus Portal : A-MLC - Locus A-MLC is a fully featured mobile positioning system. The solution includes a high accuracy GSM network positioning capability for building and running Mobile Location Services. Locus A-MLC solution architecture is compliant with OMA (Open Mobile Alliance) specifications. A Locus A-MLC system environment is described below:
(source : http://www.locusportal.com/products/amlc/prod_amlc_sysenv.html)
A-MLC is a self-contained network element, physically implemented in a 19" rack, and connects to IP- and SS7 networks as described here. The Open Mobile Alliance (OMA) Mobile Location Protocol is supported in A-MLC. Client Applications (Mobile Location Services) connect to A-MLC using standard Open Mobile Alliance (OMA) MLP protocol. The connections are secured and access to the internal network is protected by a firewall. Connecting clients are authenticated before granting access to positioning information.
CommeScope(Andrew): Geometrix MLC mobile location system - Its unparalleled advantage is that it is capable of applying the full range of mobile locating tachonologies to best match the particulars of a given location-enhanced service/application or set of application. Geometrix MLC supports handset-based, network-based, and hybrid locating technologies on a common platform. Operators can utilize the following techniques individually or in combination: Cell Identity (CID) Assisted-GPS (A-GPS) Enhanced Cell Identity (E-CID) Matrix Uplink Time Difference of Arrival (U-TDOA) Angle of Arrival (AOA)
The steps of the Geometrix Syetem Operation
Ericsson - Mobile Positioning System(MPS) - It is Ericsson's positioning platform for Location Based Services. MPS supports both the SS7-based control plane and the IP-based Secure User Plane Location (SUPL) architectures.
MPS supports the standardized Mobile Location Protocol (MLP).
It supports the cell-based positioning methods Cell Global Identity with Timing Advance (CGI/TA), Enhanced CGI (E-CGI), Cell ID and Round Trip Time (RTT- similar to TA) for WCDMA and Any Time Interrogation (ATI).
It supports Spatial Triggers, a function that notifies applications automatically when a mobile phone enters or leaves a certain pre-defined location, or when two mobile phones approach each other.