HUAWEI EQUIPMENT INSTALLATION

Internal

OMQ001101
HUAWEI PCU6000 System Overview
ISSUE 2.0
www.huawei.com

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 Upon completion of this course, you will be

able to:
 Understand the PCU structure
 Know the PCU Networking topologies
 Master the PCU typical configuration

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References

 PCU Technical Manual
 PCU Hardware Description Manual

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Position of PCU
Um
CCU
CCU

BSC

BTS

GSN

Gb

A

PCU

Abis
CCU

BTS

PCU

CCU

CCU

BTS

GSN

BSC
Gb

GSN

BSC

C

PCU

CCU

Gb

CCU=Channel Codec Unit
PCU= Packet Control Unit
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B

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Position of Huawei PCU

CCU

BSC

BTS
CCU

SGSN

PCU
CCU

BTS

Gb

BSC
Pb

CCU
Abis

Um

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GPRS(BSS side) upgrade to EDGE

G

E

D
T E
X
R
R T
X

upgrade BTS
software and
hardware - new EDGE
TRX

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Upgrade BSC
software

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Upgrade PCU
software

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PCU Cabinet
A PCU cabinet contains three kinds of
frames:
 Power distribution frame


Power distribution frame

− It accommodates a power distribution
box that is externally connected to the
-48 V power supply

LAN switch frame

 LAN switch frame
− It enables active/standby POMU board
communication and remote O&M

Dummy Panel

 PCU processing frame

− The PCU processing frame manages
the GPRS service and radio resources
PCU processing
frame
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PCU frame board full configuration

Front view

Back view

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PCU logical structure
SGSN

LAN Switch
E1

PCU Frame

BSC
1+1

RPPU

E1

HSC
HSC

POMU

OMC

BTS

High Speed Data Bus

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PCU boards
 POMU: PCU Operation & Maintenance Unit
 BSU:

Back Storage Unit

 HSC:

Hot Swap Controller Board

 RPPU: Radio Packet Processing Unit
 L2PU: Layer 2 Processing Unit
 E1TMb: Back board of the RPPU Board
 UPWRb: Power supply Board

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POMU
 The processing board in the PCU frame for O& and

configuration
 Processing the interface protocols between PCU and users
 Processing the interface protocols between PCU and OMC.
POMU

High speed data bus
interface module

OMUB board

OMC
HSC interface
module

OAM

Telnet

Telnet
server

Command
interpretation

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RPPU
interface
module

Send
command
Receive
data

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HSC board

Alarm/Traffic
measurement
O&M command
Alarm report/
Traffic meas
. data/O&M result

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HSC
 Hot Swap Controller

Together with the POMU board, HSC controls the whole physical
equipment in the PCU processing frame.
HSC
Control
unit

Other physical
equipment in the PCU
processing frame,
equipment, electrical
fan, including power
supply indicators, etc.

8-slot
subsystem A
Connecting
unit

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8-slot
subsystem B

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RPPU
 Radio Packet Processing Unit

 Completes the functions of the RLC/MAC protocol, the BSS
part of Gb interface protocol stack, Pb interface and G-Abis
interface processing.
 Together with other boards, RPPU completes GPRS radio
resource management functions.
 According to the software in the plug-in board, the RPPUs are
divided into RPPU (Pb) and RPPU (Gb), which are used on
Pb interface and Gb interface separately.

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L2PU
 A kind of Layer 2 processing board

 Inserted in the RPPU board, used in Pb or Gb interface.
 Each L2PU supports four standard E1 interfaces.
 Each RPPU board can hold two L2PU boards, so it can provide
8 standard E1 interfaces at most.
RPPU
board

Inter-board
communication

Protocol
processing

E1 interface
BSC

Abnormality
processing Operation
& maintenance

SGSN
Indicator

L2PU board
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E1TMb
 The back board used together with the RPPU board

 Provides the network interface
 Provides RPPU with 8 E1 ports Through one DB50 connector

E1TMb
SGSN/BSC/BTS
RPPU

E1TM

8 E1 ports
processing

E1 signal
RPPU

Debugging Console

Front Frame

Ethernet
interface

Back Frame

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Ethernet
signal


E1TMb-DIP Switches
 The DIP switches are used to configure the

type of E1 interface to 75 ohm or 120 ohm
 One E1TMb cannot offer the two types at the

same time
 The default type of E1 interface configuration

is 75 ohm

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Chapter 1 PCU Hardware Structure

Chapter 2 PCU Networking Topologies
Chapter 3 PCU Capacity & Configuration

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Interfaces of PCU
BTS

G-Abis

OMC

BSC

PCU

Pb

Abis
BTS

O interface

BSC
PCU

BTS

Um

SGSN

GB

BSC

 Um interface: interface between MS and BTS
 Gb interface: interface between PCU and SGSN
 Pb interface: interface between PCU and BSC
 G-Abis interface: interface between PCU and BTS
 O interface: interface between PCU and OMC
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Gb interface: Point-to-Point connection

PCU

Gb

SGSN

 Case 1:PCU is DTE,SGSN is DCE (defined in GSM 08.16)
 Case 2:PCU is DCE,SGSN is DTE (Supported by Huawei PCU)

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Gb interface: Connection via Frame Relay Network

Frame
Relay
Network
PCU
SGSN

PCU is configured as DTE,SGSN is also configured as DTE

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PCU topology
BSS

A
Gs
PCU

MSC/VLR

SS7

Gr

Gb

BSS

HLR

SGSN

GPRS CN

GSM BSS

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PCU topology

BSS
MSC
A
PCU

Gs

FR

SS7

Gb

BSS

Gb

Gr

HLR

SGSN
GSM BSS

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GPRS CN

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Chapter 1 PCU Hardware Structure
Chapter 2 PCU Networking Topologies
Chapter 3 PCU Capacity & Configuration

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POMU, HSC configuration principle
 POMU boards work in the 1+1 backup mode

 There is only one POMU working at one time
 Two POMU are necessary to enhance the reliability of the PCU system
 HSC board is configured corresponding to the POMU

 The HSC in slot 9 is used with the POMU in slot 6
 The HSC in slot 7 is used with the POMU in slot 8

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6 7 8 9
P H P H
O S O S
M C M C
U
U


RPPU configuration principle
 RPPU work in load-sharing mode

 RPPU for Pb interface is configured from board 0 on the left side
(maximum 9 boards can be configured)
 RPPU for Gb interface is configured from board 15 on the right side
(maximum 9 boards can be configured)
 In Pb interface, each RPPU supports 120 packet channels activated at the

same time; If there are EDGE cells, each RPPU can support 100 PDCH
 In Gb interface, each RPPU supports about 8Mbit/s data flow
 One RPPU can connect to several BSCs while can not process the data from

different BSCs at the same time, so we suggest one BSC be connected to
one RPPU separately when the PCU connects to several BSCs
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