User's Manual

Confidential
LTE eNB System Description v2.0 27
Copyright © 2017, All Rights Reserved.
Chapter 3 System Structure
Hardware Structure
The LTE eNB is the system that consists of Cabinet DU (CDU) which is a
common platform DU, and Remote Radio Heads (RRH) which is an RU.
CDU
The CDU is connected to RRH through CPRI, and it can provide up to 4 carrier/3
sector service.
The following figure shows the configuration of LTE eNB:
Figure 12. Internal Configuration of eNB
Index
Data Traffic + Alarm/Control (Ethernet)
Alarm/Control
CPRI Interface (Optic)
Clock
Backhaul
LCC4-B1A
LMD1-J1A
CDU
R
R
H
(0)
R
R
H
(1)
R
R
H
(2)
GPS
EPC
UDE (FE)
9.8 Gbps CPRI Interface
Rectifier
Power (-48 V DC)
UDA (9Rx/2Tx)
FE/GE
R
R
H
(3)
R
R
H
(11)
. . .
Up to three channel card can be mounted in a CDU and LCC4 has a capacity of 1
carrier/3 sector per board by default.
The four slots of CDU are multi-board type slots where LMD1 carries out the
main processor function, network interface function, clock generation and
distribution function, provider-requested alarm processing, and so on. The LCC4-
B1A carries out the modem function. The power module, fan, and air filter are also
installed.
The RRH is an RF integration module consisting of a transceiver, power amplifier,