GTP protocol in Mobile Networks
GTP refers to "GPRS Tunneling Protocol". It is a main protocol in 2G/3G/4G/5G mobile networks, it allows seamless data and signalling connectivity between network nodes.
GTP protocol creates tunnels between network elements to transmit user data and signalling messages between them. This ensures data and signalling messages delivery by encapsulating and forwarding them through the core network.
The following are the main variants of this protocol,
- GTP-C (GTP Control Plane): Creates GTP-C tunnels that forwards signalling messages between network nodes.
- GTP-U (GTP User Plane): Creates GTP-U tunnels that forwards user data traffic between network nodes.
- GTP': Used for charging and billing functions, such as sending charging information between nodes.
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Your Guide to LTE Interfaces (S11, S5, S8, SGi, S1-U)
Let's talk about LTE Interfaces. In LTE, every interface between two network nodes, is having an interface name, that represents the protocols used in the communication between those nodes. Below graph shows LTE Interfaces that exist between different nodes, In order to understand LTE Interfaces, we need first to understand the difference between the control…
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GTP tunnel and TEID
TEID refers to 'Tunnel End Point Identifier'. After creating a PDP context between the MS and the GGSN, the data is sent transparently between the MS and the GGSN. In other words, for computer networks geeks, there is a virtual point to point connection between the MS and the GGSN. TEID - GTP tunnel between…
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Gn Interface and Gp Interface
Gn/Gp interface, is the interface between the SGSNs and the GGSNs. 'Gn interface' is the interface between the SGSNs and the GGSNs when they exist within the same mobile network. In case of roaming scenario, the user is traveling to another mobile network. In this case, the SGSNs and the GGSNs will be in different…
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