A PCU (Packet Control Unit) computer is a component within a GPRS (General Packet Radio Service) Base Station Subsystem (BSS) that acts as a bridge between the SGSN (Serving GPRS Support Node) and the radio network. It utilizes frame relay technology for communication.
Here's a breakdown:
- Function: The PCU's primary role is to manage packet data transmission between the mobile network (radio network) and the core network (SGSN).
- Location: It is typically located within the base station subsystem, often as part of the BSC (Base Station Controller) or even integrated into the base transceiver station (BTS) in more modern architectures.
- Technology: The PCU uses frame relay to transfer data between the radio network and the SGSN. Frame relay is a packet-switching technology used in telecommunications networks.
- Importance: The PCU is crucial for enabling GPRS and EDGE (Enhanced Data rates for GSM Evolution) services, allowing mobile devices to access the internet and other packet-switched data services.
In simpler terms, think of the PCU as the traffic controller for data packets in the mobile network, ensuring smooth and efficient communication between your mobile device and the internet.
