Gp Interface in 2G/3G Telecom Network
Gp Interface is the interface between the SGSN and the GGSN that exist in different networks (different PLMNs). [ex: in case of Roaming.]
It is working in both the control plane and the user plane.
It uses GTP-C protocol in the control plane. And uses GTP-U protocol in the user plane.
![](https://i0.wp.com/mobilepacketcore.com/wp-content/uploads/2024/01/2G3G-Network-interfaces.png?resize=960%2C620&ssl=1)
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Roaming Architecture in 2G/3G
To understand Roaming architecture in GPRS, there are a few terms we have to understand, Outbound roaming The outbound roaming
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SGSN, GGSN – 2G/3G Network Architecture and Interfaces
2G/3G Network Nodes The following graph shows the 2G/3G Network Architecture. It includes the SGSN, GGSN, HLR, CG, PDN, RNC,
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