User's Manual

CHAPTER 4. Message Flow
4-26
© SAMSUNG Electronics Co., Ltd.
4.2 Bearer Message Flow
The data that the SPI-2L10 has received from the ACR is sent to the call processing block
of the corresponding processor via the Ethernet switch, and then it is divided into the MAC
PDU data and transmitted to the modem block. Then the data is sent again to the RF block
through the CPRI. These signals undergo signal conversion and amplification and then are
transmitted wirelessly via the antenna.
In the other direction, the MAC PDU data that the SPI-2L10 has received from the MS via
the R1 interface is converted by the RF block into baseband signals and then converted into
digital signals. The converted signals are reassembled into the MAC PDU through the
CPRI via the modem of the digital block and then transmitted to the ACR via the Ethernet
switch.
Figure 5.17 Bearer Message Flow
Asynchronous Digital Interfaces (ADI)
The ADI is a 16-bit digital interface and has a throughput of 160 Mbps between
devices.
TOD
GPS Block
ACR
GPS
Antenna
Traffic flow
Traffic (optic interface)
Control and Clock
ADI bus
CPLD
Processor
M
TOD
PP2S 10 MHz
Clock
TOD
1588 Block
Low MAC
S
PCI 32 bit
Modem
EMIF 32 bit
M2DA-A
Debug
Eth
PHY
Eth S/W
Eth
PHY
Eth
PHY
GMII
MII
Processor
M
PCI 32 bit
Low MAC
S
Modem
SCPRI
System Clock
1000BASE-LX
Reserve
Debug
SCPRI#1
SCPRI#2
EMIF 32 bit
ADI
ADI
MII
H
삭제됨: SS
삭제됨: 100BASE-TX