User's Manual
Table Of Contents
- INTRODUCTION
- Purpose
- Document Content and Organization
- Conventions
- Revision History
- CHAPTER 1. Samsung LTE System Overview
- CHAPTER 2. System Overview
- CHAPTER 3. System Structure
- CHAPTER 4. Message Flow
- CHAPTER 5. Supplementary Functions and Tools
Ver.
CHAPTER 2. System Overview
2600-00FKQFGA2
1.0
Protocol Stack between eNB and EPC
The eNB and the EPC are connected physically through the FE and GE method, and the
connection specification should satisfy the LTE S1-U and S1-MME interface. In the user
plane, the GTP-User (GTP-U) is used as the upper layer of the IP layer; and in the Control
plane, the SCTP is used as the upper layer of the IP layer.
The figure below shows the user plane protocol stack between the eNB and S-GW.
Figure 5. Protocol Stack between eNB and S-GW User Plane
The figure below shows the control plane protocol stack between the eNB and MME.
Figure 6. Protocol Stack between eNB and MME Control Plane
S1-MME
S1-U
eNB
UDP
IP
L2
L1
S-GW
UDP
IP
L2
L1
GTP-U GTP-U
User Plane
PDUs
User Plane
PDUs
S1-MME
eNB
IP
L2
L1
MME
IP
L2
L1
SCTP SCTP
S1-AP S1-AP
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