System Description

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Chapter 1 Samsung LTE System Overview
SOL230 System Description v1.0 6
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Protocol Stack between NEs
Table below outlines the inter-NE protocol stack of the SmallCell.
Table 1. SmallCell supports the following interfaces for interworking with NEs
Target System
Interface Name
Physical Interface
S-GW
S1-U
GE/FE
SmallCell
X2-C/X2-U
GE/FE
Small Cell EMS
TR-069/FTP
GE/FE
UE
Uu
Air
S1 Interface Protocol Stack
Figure below depicts the protocol stack for the S1 interface user plane.
Figure 3. S1 Protocol Stack-Control Plane (S1-MME)
SmallCell
UDP
IP
L2
L1
S-GW
UDP
IP
L2
L1
GTP-U GTP-U
S1-U
Uu Interface Protocol Stack
The user plane protocol layer consists of the PDCP, RLC, MAC, and PHY layers,
as depicted in figure below.
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