> For the complete documentation index, see [llms.txt](https://gtp.learn-telecom.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gtp.learn-telecom.com/gtp/gtp-c-control.md).

# GTP-C (Control)

**GTP-C (GPRS Tunneling Protocol - Control Plane)** is a protocol used for signaling within the GPRS core network. It facilitates the control signaling for creating, modifying, and deleting tunnels. 

The GTP-C protocol is responsible for functions such as session and mobility management, routing information exchange, and error handling. 

It operates over UDP, typically using port 2123, and is essential for effective packet data transfer in mobile networks.

#### Key Features of GTP-C

* **Session Management**: GTP-C plays a crucial role in initiating and managing user sessions, and handling parameters necessary for establishing data bearer contexts.
* **Mobility Management**: Supports mobility by facilitating seamless handovers, ensuring ongoing data sessions are maintained without interruption when a user moves across cells or network regions.
* **Routing Information**: Efficiently exchanges necessary routing information between network nodes, ensuring correct delivery paths for user data packets.
* **Error Handling**: Implements robust error detection and correction mechanisms to ensure reliable communication and data integrity.

#### Protocol Operations

GTP-C messages are exchanged between GPRS network nodes, such as SGSNs (Serving GPRS Support Nodes) and GGSNs (Gateway GPRS Support Nodes). 

These operations are integral to the management of the network's dynamic connections and resources, ensuring optimal network performance and user experience.