S5 Interface in 4G-LTE Network
S5 interface is the interface between the SGW and the PGW that exist in the same network (PLMN).
S5 Interface works in both the Control Plane and the User Plane.
It uses GTP-C protocol in the Control Plane, which creates a GTP tunnel between the SGW and the PGW in order to exchange signaling messages between each other.
And It uses GTP-U protocol in the User Plane, which creates a GTP Tunnel between the SGW and the PGW in order to exchange user plane data between each other.
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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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LTE (4G) Network Architecture
LTE (4G) Network Nodes LTE refers to 'Long Term Evolution', and the architecture of the LTE (4G) network is as following, eNodeB The eNodeB is the 4G site that the UE connects to. It provides the radio interface to the UE. MME MME refers to 'Mobility Management Entity'. The MME is responsible for authenticating the…
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