BSS stands for Base Station Subsystem.

It is a component of a cellular network that is responsible for performing crucial functions required for communication between mobile devices and the core network.

The BSS is composed of the following key components:

• Base Transceiver Station (BTS): The BTS is responsible for handling the wireless interface for communication with mobile devices within its coverage area.
• Base Station Controller (BSC): The BSC manages and controls multiple BTSs. It handles tasks such as allocating radio frequencies, handovers between cells, and optimizing network performance.

The BSS performs essential functions, including:

1. Radio Link Management: It manages the radio resources between the BTS and mobile devices, ensuring quality and efficient wireless communication.
2. Call Control: It controls the setup, maintenance, and termination of calls between mobile devices within the network.
3. Mobility Management: It handles tasks related to mobility, such as tracking the location of mobile devices, handovers, and managing network congestion.
4. Encryption: It encrypts voice and data transmissions to ensure secure communication.
5. Power Control: It adjusts the power levels of BTS and mobile devices to optimize signal quality and minimize interference.