SET (SUPL enabled terminal)
SET, which stands for SUPL Enabled Terminal, refers to a type of mobile device that supports the Secure User Plane Location (SUPL) protocol. The SUPL protocol is designed to enable accurate and secure positioning information on mobile devices, primarily for location-based services (LBS) such as navigation, tracking, and emergency services.
Here's a detailed explanation of SET and its components:
SUPL Protocol:
The Secure User Plane Location (SUPL) protocol is a standardized protocol developed by the Open Mobile Alliance (OMA) for exchanging positioning information between a mobile device and a location server. It operates on the user plane, which is the communication path between the mobile device and the network, allowing the device to transmit and receive location data securely.
Location Server:
The location server is a central component that stores and manages location-based information. It communicates with the SET to provide accurate positioning data. The server may obtain location information from various sources, including GPS satellites, cellular networks, Wi-Fi access points, or even sensor data from the device itself. It uses the SUPL protocol to send location requests and receive location information from the SET.
Mobile Device:
A SET refers to a mobile device that supports the SUPL protocol for positioning services. It can be a smartphone, tablet, or any other mobile device capable of communicating with the location server. The SET integrates with the device's operating system and hardware to enable accurate positioning and location-based services. The key components of a SET are:
a. GNSS Receiver: The Global Navigation Satellite System (GNSS) receiver is responsible for receiving signals from satellite constellations such as GPS, GLONASS, Galileo, or BeiDou. It calculates the device's position based on the received signals, enabling accurate location determination.
b. SUPL Client: The SUPL client is the software component on the SET that implements the SUPL protocol. It establishes a secure connection with the location server and handles the exchange of location-related data. The SUPL client communicates with the GNSS receiver to obtain raw positioning data, which is then sent to the location server for further processing.
c. Location-Based Services (LBS): The SET integrates with various location-based services to provide value-added functionality. Examples of LBS include navigation apps, ride-sharing services, geolocation-based advertising, emergency services, and more. These services leverage the precise positioning capabilities of the SET to offer customized and context-aware experiences to the users.
Security:
SUPL focuses on maintaining the security and privacy of the location data transmitted between the SET and the location server. It employs encryption mechanisms to protect the data from unauthorized access or tampering. Additionally, SUPL supports authentication and authorization mechanisms to ensure that only authorized devices and servers can access the positioning services.
In summary, a SUPL Enabled Terminal (SET) refers to a mobile device equipped with the necessary hardware and software components to support the Secure User Plane Location (SUPL) protocol. By utilizing the SUPL protocol, SETs can establish a secure connection with location servers, exchange positioning data, and enable a range of location-based services on the device.