ZTE ZXG OB06 User Manual
ZXG10 OB06
Integrated Outdoor GSM Base S tation
Technical Manual
ZTE CORPORATION
ZTE Plaza, Keji Road South,
Hi-Tech Industrial Park,
Nanshan District, Shenzhen,
P. R. China
518057
Tel: (86) 755 26771900 800-9830-9830
Fax: (86) 755 26772236
URL: http://support.zte.com.cn
E-mail: doc@zte.com.cn
V ersion 1.0
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Copyright © 2005 ZTE CORPORATION.
The contents of this document are protected by copyright laws and international treaties. Any reproduction or distribution of
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This document is provided “as is”, and all express, implied, or statutory warranties, representations or conditions are
disclaimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose, title or noninfringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from the use of or reliance on
the information contained herein.
ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applications covering the
subject matter of this document. Except as expressly provided in any written license between ZTE CORPORATION and its
licensee, the user of this document shall not acquire any license to the subject matter herein.
The contents of this document and all policies of ZTE CORPORATION, including without limitation policies related to support
or training are subject to change without notice.
Revision History
Date Revision No. Serial No. Description
2006/07/11 R1.1 sjzl20060069 English - For customers
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Content s
About this Technical Manual.....................................................................xi
Purpose of this Technical Manual............................................................................. xi
Typographical Conventions.....................................................................................xii
Mouse Operation Conventions................................................................................xiii
Safety Signs......................................................................................................... xiii
How to Get in Touch .............................................................................................xiv
Customer Support ................................................................................................................xiv
Documentation Support ........................................................................................................ xiv
Chapter 1..................................................................................... 1
System Architecture...................................................................................1
System Introduction ...............................................................................................1
System Background ................................................................................................................1
Applicable Standards ...............................................................................................................3
Major Functions ....................................................................................................................... 3
System Working Principle ........................................................................................ 5
Hardware Structure ................................................................................................6
Software Architecture.............................................................................................. 8
CMM .......................................................................................................................................9
FUC ......................................................................................................................................12
CHP ......................................................................................................................................13
CIP .......................................................................................................................................14
System Features .................................................................................................. 14
Chapter 2...................................................................................17
Technical Indexes ................................................................................... 17
Physical Performance ............................................................................................ 17
Dimensions, Color and Structure ............................................................................................ 17
Weight of Integrated Equipment and Weight Bearing Requirements of Equipment Room Ground
............................................................................................................................................17
Power Supply ....................................................................................................... 18
Power Supply Range of Power Supply System ........................................................................18
Power Consumption Indexes.................................................................................................. 18
Ambient Conditions............................................................................................... 18
Requirements for Grounding and Lightning Protection .............................................................18
Requirements for Temperature and Humidity: ........................................................................ 19
Requirements for Cleanness .................................................................................................. 19
Requirements for Atmospheric Pressure .................................................................................20
Interface Indexes ................................................................................................. 20
Abis Interface Indexes ...........................................................................................................20
Um Interface Indexes ............................................................................................................21
Capacity Indexes .................................................................................................. 23
Clock Indexes....................................................................................................... 23
Reliability Indexes................................................................................................. 23
Chapter 3...................................................................................25
Interfaces and Communications............................................................. 25
Overview ............................................................................................................. 25
Interfaces ............................................................................................................ 26
Abis Interface ........................................................................................................................ 26
Um Interface.........................................................................................................................28
Inter-Cabinet Cascaded Interface of Same Site ....................................................................... 30
Interfaces of the Tower Amplifier System ............................................................................... 31
Man-Machine Interface (MMI) ................................................................................................31
Protocol Introduction............................................................................................. 32
LapD Protocol ........................................................................................................................ 32
LapDm Protocol ..................................................................................................................... 34
RR/MM/CM Protocol...............................................................................................................37
Chapter 4...................................................................................39
System Functions.................................................................................... 39
Overview ............................................................................................................. 39
Major RF Functions ............................................................................................... 39
High Receiving Sensitivity ......................................................................................................40
Flexible Configuration ............................................................................................................40
Easy O&M ............................................................................................................................. 40
Diversity Receiving ................................................................................................................40
Frequency Hopping ...............................................................................................................40
Power Control .......................................................................................................................40
Baseband Processing ............................................................................................ 41
Signaling Processing ............................................................................................. 41
Wireless Link Management Function .......................................................................................41
Dedicated Channel Management Function .............................................................................. 47
Public Channel Management Function..................................................................................... 60
TRX Management Function ....................................................................................................65
O&M.................................................................................................................... 68
Parameter Configuration ........................................................................................................ 69
Alarm and Status Reporting ...................................................................................................69
Online Software Loading ........................................................................................................70
Ultra-Distance Coverage........................................................................................ 71
Chapter 5...................................................................................75
Networking Modes and System Configurations..................................... 75
Networking Modes ................................................................................................ 75
System Configuration............................................................................................ 77
Number and Types of Sites .................................................................................................... 77
BS Configuration Principles ....................................................................................................79
Expansion Configuration ........................................................................................................82
Configuration Examples .........................................................................................................82
Appendix A................................................................................ 91
Pertinent Standards ................................................................................ 91
Appendix B................................................................................93
FCC STATEMENT ...................................................................................... 93
Appendix C................................................................................95
CE STATEMENT ........................................................................................ 95
Abbreviations ...............................................................................97
Figures........................................................................................101
Tables .........................................................................................103
About this Technical Manual
The ZXG10 is a GSM mobile communication system independently
developed by ZTE Corporation. It is composed of the ZXG10-MSS mobile
switching subsystem and the ZXG10-BSS base station subsystem. The
ZXG10-BSS Base Station Subsystem provides and manages radio
transmission in GSM, and it is composed of the ZXG10-BSC Base Station
Controller and the ZXG10-BTS Base Transceiver Station.
ZXG10 OB06 is one of the ZXG10-BTS series of base transceiver stations,
and is an integrated outdoor BTS for GSM. Installed outdoors, the ZXG10
OB06 features high capacity, compactness, high reliability, high
performance/cost ratio, complete functions, and powerful capability of
service supporting.
Purpose of this Technical Manual
The ZXG10 OB06 (V1.0) Compact Outdoor BTS for GSM—Technical Manual
introduces the working principle, functions and technical features of the
ZXG10 OB06 (V1.0) compact outdoor BTS for GSM, enabling the user to
have an all-around understanding of the technical features of the ZXG10
OB06 (V1.0).
The whole set of documents also include:
ZXG10 OB06 (V1.0) Compact Outdoor BTS for GSM Guide to
Documentation
ZXG10 OB06 (V1.0) Compact Outdoor BTS for GSM Hardware Manual
ZXG10 OB06 (V1.0) Compact Outdoor BTS for GSM Installation Manual
ZXG10 OB06 (V1.0) Compact Outdoor BTS for GSM Maintenance
Manual—Routine Maintenance
ZXG10 OB06 (V1.0) Compact Outdoor BTS for GSM Maintenance
Manual—Emergency Handling
ZXG10 OB06 (V1.0) Compact Outdoor BTS for GSM Maintenance
Manual—Troubleshooting
This manual includes five chapters.
Confidential and Proprietary Information of ZTE CORPORATION xi
ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
Chapter 1 System Architecture introduces the background, major
functions, architecture of the software and hardware of ZXG10 OB06
(V1.0), and standards it complies with. It gives the user a general idea of
the system.
Chapter 2 Technical Indexes specifies the performance indexes of
ZXG10 OB06 (V1.0).
Chapter 3 Interfaces and Communications outlines the external
interfaces and main interface protocols for ZXG10 OB06 (V1.0)
Chapter 4 System Functions details the functions of the ZXG10 OB06
(V1.0).
Chapter 5 Networking Modes and System Configuration gives a
detailed description of various networking modes, connection and
configuration of the ZXG10 OB06 (V1.0).
Appendix A introduces the specifications cited in the manual.
Appendix B,FCC STATEMENT.
Appendix C, CE STATEMENT.
Abbreviations list all the abbreviations used in the manual.
Typographical Conventions
ZTE documents employ with the following typographical conventions.
TABL E 1 TYPOGRAPHICAL CONVENTIONS
Typeface Meaning
Italics
“Quotes” Links on screens.
Bold Menus, menu options, function names, input fields, radio
CAPS Keys on the keyboard and buttons on screens and company
Constant width
References to other guides and documents.
button names, check boxes, drop-down lists, dialog box
names, window names.
name.
Text that you type, program code, files and directory names,
and function names.
[ ] Optional parameters
{ }
| Select one of the parameters that are delimited by it
xii Confidential and Proprietary Information of ZTE CORPORATION
Mandatory parameters
Note: Provides additional information about a certain topic.
About this Technical Manual
Typeface Meaning
Checkpoint: Indicates that a particular step needs to be
checked before proceeding further.
Tip: Indicates a suggestion or hint to make things easier or
more productive for the reader.
Mouse Operation Conventions
TABL E 2 MOUSE OPERATION CONVENTIONS
Typeface Meaning
Click Refers to clicking the primary mouse button (usually the left
mouse button) once.
Double-click Refers to quickly clicking the primary mouse button (usually
the left mouse button) twice.
Right-click Refers to clicking the secondary mouse button (usually the
right mouse button) once.
Drag Refers to pressing and holding a mouse button and moving
the mouse.
Safety Signs
TABL E 3 SAFETY SIGNS
Safety Signs Meaning
Danger: Indicates an imminently hazardous situation, which if
not avoided, will result in death or serious injury. This signal
word should be limited to only extreme situations.
Warning: Indicates a potentially hazardous situation, which if
not avoided, could result in death or serious injury.
Caution: Indicates a potentially hazardous situation, which if not
avoided, could result in minor or moderate injury. It may also
be used to alert against unsafe practices.
Erosion: Beware of erosion.
Electric shock: There is a risk of electric shock.
Electrostatic: The device may be sensitive to static electricity.
Confidential and Proprietary Information of ZTE CORPORATION xiii
ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
Safety Signs Meaning
Microwave: Beware of strong electromagnetic field.
Laser: Beware of strong laser beam.
No flammables: No flammables can be stored.
No touching: Do not touch.
No smoking: Smoking is forbidden.
How to Get in Touch
The following sections provide information on how to obtain support for
the documentation and the software.
Customer Support
If you have problems, questions, comments, or suggestions regarding
your product, contact us by e-mail at support@zte.com.cn. You can also
call our customer support center at (86) 755 26771900 and (86) 8009830-9830.
Documentation Support
ZTE welcomes your comments and suggestions on the quality and
usefulness of this document. For further questions, comments, or
suggestions on the documentation, you can contact us by e-mail at
doc@zte.com.cn; or you can fax your comments and suggestions to (86)
755 26772236. You can also explore our website at
http://support.zte.com.cn, which contains various interesting subjects like
documentation, knowledge base, forum and service request.
xiv Confidential and Proprietary Information of ZTE CORPORATION
Chapter 1
System Architecture
This chapter describes the background, the standards followed, major
functions, system features, working principles and the general structure of
both the software and hardware of the ZXG10 OB06 (V1.0).
System Introduction
System Background
ZXG10 OB06 is a high-capacity outdoor BTS for GSM, with a single cabinet
supporting six carriers at the maximum. It is to be installed outdoors,
integrating functions of transmission, power supply, environment
monitoring and temperature control in one system. It is applicable to the
following cases: The cost of a standard equipment room would be too high
in the site selected for it, for example, in the center of a city; there is no
equipment room in the site selected for it, for example, in the countryside
or in the remote areas of a city.
The availability of ZXG10 OB06 adds another product to the ZXG10-BTS
series and makes the ZXG10 system offer more flexible networking modes,
hence more powerful market competition edge.
Confidential and Proprietary Information of ZTE CORPORATION 1
ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
The appearance of the whole ZXG10 OB06 is shown in Figure 1
FIGURE 1 APPEARANCE OF THE ZXG10 OB06
Figure 2 shows the position of ZXG10 OB06 (V1.0) in a GSM/GPRS
network.
FIGURE 2 POSITION OF ZXG10 OB06 IN GSM/GPRS NETWORK
BSC
A
Abis
AUC
ZTE
Um
MSC
Gb
HLR
OB06
OMC
A
SGSN
Gb
OB06
GGSN
ZTE
GGSN
BSC
Abis
Um
PLMN
SGSN
Internet
PDN
MSC/VLR
PSTN
ISDN
PSPDN
PLMN
BTS
MS
In the GSM/GPRS system, the ZXG10 OB06 is located between the BSC
and MS, connected to the BSC through an Abis interface, and connected to
the MS through an Um interface. The ZXG10 OB06 provides functions of
2 Confidential and Proprietary Information of ZTE CORPORATION
MS
Chapter 1 - System Architecture
serving as a radio transceiver for a cell, converting between the BSC and a
radio channel, wireless transmission with the MS and the related
controlling function.
Applicable Standards
It supports GSM Phase I/ GSM Phase II/GSM Phase II + standards.
Its radio frequency (RF) interface complies with ETSI TS 101 087 Version
5.0.0 GSM05.05 and GSM11.21.
Its Abis interface complies with the ITU-T G.703/ITU-T G.704 interface
standards.
Its high/low temperature indexes comply with the specifications in
GSM11.21.
In terms of radio services, it complies with the following protocols and
specifications.
GSM03.60 General Packet Radio Service (GPRS) Service description
GSM03.64 General Packet Radio Service (GPRS) Overall description of the
GPRS radio interface
GSM04.04 Technical Specification Group GSM/EDGE Radio Access Net
Work Layer 1 General requirements
GSM04.06 Mobile Station - Base Station System (MS - BSS) interface Data
Link (DL) layer specification
GSM04.08 Mobile radio interface layer 3 specification
GSM04.60 General Packet Radio Service (GPRS) Mobile Station (MS) Base Station System (BSS) interface Radio Link Control/ Medium Access
Control (RLC/MAC) protocol
GSM05.02 Multiplexing and multiple access on the radio path
GSM05.08 Radio subsystem link control
GSM08.58 Base Station Controller - Base Transceiver Station (BSC - BTS)
interface Layer 3 specification
The EMC complies with the ETSI 301489-8 specifications
R&TTE Directive 1999/5/EC
Major Functions
The ZXG10 OB06 (V1.0) has the following functions:
1. It supports GSM Phase I/ GSM Phase II/GSM Phase II + standards.
Confidential and Proprietary Information of ZTE CORPORATION 3
ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
2. It supports GSM900, EGSM900, GSM850, GSM1800 and GSM1900
systems; it also supports modules of different frequency bands
inserted in the same cabinet.
3. It provides the following TCH services:
TCH/FS: Full-rate voice traffic channel
TCH/HS: Half-rate voice traffic channel
TCH/EFS: Enhanced full-rate voice traffic channel
TCH/F9.6: 9.6 kbit/s full-rate data traffic channel
TCH/F4.8: 4.8 kbit/s full-rate data traffic channel
TCH/F2.4: 2.4 kbit/s full-rate data traffic channel
It supports service channels related with GPRS service
4. It provides a diversity receiving function. Main diversity technologies
are space diversity, frequency diversity, time diversity and polarization
diversity.
5. The receiving end adopts the Viterbi soft decision algorithm, improving
the channel decoding performance and increasing the system receiving
sensitivity and anti-interference capability.
6. It supports frequency hopping, improving the system capability against
Rayleigh fading.
7. It supports the discontinuous transmission (DTX) mode, only
transmitting comfort noise in the voice non-activated period, and
reducing the transmitter power and general interference level in the air
signaling.
8. It can calculate the time advance.
9. For GSM 900 and EGSM 900 systems, it supports configurations with
power consumption of 40 W or 80 W. For GSM1800, GSM1900 and
GSM850 systems, it supports 40 W configuration.
10. One OB06 (40 W configuration, in this document, 40 W for the GMSK
mode, and 25 W for the 8PSK mode) supports 6 TRXs, supports
extension of 18 TRXs at the same site, and one site supports extension
of S6/6/6.
11. One OB06 (80 W configuration, in this document, 80 W for the GMSK
mode, and 50 W for the 8PSK mode) supports 3 TRXs, supports
extension of 9 TRXs at the same site, and one site supports extension
of S3/3/3.
12. It supports star, chain and tree configuration of Abis interfaces.
13. It supports satellite transmission links of Abis interfaces, with the
unidirectional transmission delay of Abis interfaces being 260 ms.
14. It supports LapD signaling 1: 4 TEI multiplex of Abis interfaces, that is,
having 4 pieces of LapD signaling multiplexed into one 64 Kb/s
signaling timeslot through TEI.
15. When multiple OB06s are cascaded, the automatic crossover protection
function is provided for the Abis interface link when any OB06 is
powered off.
4 Confidential and Proprietary Information of ZTE CORPORATION
Chapter 1 - System Architecture
16. It supports preprocessing of the measurement reports on the OB06.
17. It supports BS power control: statically 6 levels and dynamically 15
levels.
18. It supports all paging modes defined in GSM specifications.
19. It supports synchronous handover, asynchronous handover, pseudosynchronous handover, and pre-synchronous handover.
20. It has an overall timely alarm system.
i. Available for implementing unattended BS and automatic alarming.
ii. Providing power supply and alarm for the built-in tower amplifier
system.
21. It supports EDGE service, realizing a higher data transmission rate by
means of 8PSK modulation.
22. It supports GPRS and CS1 ~ CS2 channel encoding modes. It supports
CS3 and CS4 through software upgrading, and it can adjust the
channel encoding mode dynamically according to the monitoring and
measurement results.
23. The Um interface supports A51/A52 encryption algorithm.
24. It supports ultra-distance coverage with a radius of 35 km~120 km.
System Working Principle
The working principle of ZXG10 OB06 (V1.0) is shown in Figure 3.
FIGURE 3 WORKING P RINCIPLE OF THE ZXG10 0B06 (V1.0)
RF demodulation
proces sing unit
Baseband
ZXG10-OB06
signal
Baseband
modulation signal
System clock
Control s ignal
RF unit
RF signal
proces sing unit
Antenna
Um interface
BSC
Abis
Transm ission unit
mainte nanc e unit
Data link
Operation &
System
clock
AC input
Power unit
Heat exchanger
The ZXG10 OB06 (V1.0) system is composed of an operation and
maintenance unit, a baseband processor, an RF unit, an antenna feeder
Confidential and Proprietary Information of ZTE CORPORATION 5
ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
processor, a transmission unit, a power unit and a heat exchanger. The
working principle of the system is as follows:
In the downlink direction, the ZXG10 OB06 (V1.0) receives data from BSC,
including voice and signaling data. Here, the signaling data are sent to the
control, operation & maintenance unit for processing. The voice data are
first sent to the base band processor for processing such as rate
conversion, encryption and interleaving, sent to the RF unit to be
modulated to high-frequency signals, and then finally transmitted through
the antenna feeder processor.
In the uplink direction, the antenna feeder processor receives the RF
signals from the MS, and sends them to the RF unit to convert them into
digital signals. Then, the signals are sent to the baseband processor for
rate conversion, decryption and de-interleaving. Finally, after being
converted to the code pattern suitable for long-distance transmission, the
signals are sent to the BSC through the Abis interface.
Hardware Structure
The layout of the ZXG10 OB06 system is shown in Figure 4.
FIGURE 4 LAYOUT OF THE ZXG10 OB06 SYSTEM
Promulgation frame
Power frame
1. AEM module 2. AEM fan frame 3. Transceiver module
4. RTU fan frame 5. Transmission frame 6. Power frame 7. PDM panel
8. Emergency lamp 9. Battery frame
6 Confidential and Proprietary Information of ZTE CORPORATION
Chapter 1 - System Architecture
The ZXG10 OB06 hardware consists of a control and maintenance module
(CMM), a transceiver module (TRM), an antenna feeder equipment
module (AEM), a backplane transmission module (BTM), a power module
and a heat exchanger.
The hardware structure of the ZXG10 OB06 is shown in Figure 5.
FIGURE 5 HARDWARE STRUCTURE OF THE ZXG10 OB06 (V1.0)
ZXG10 OB06
BSC
MMI
Abis
interface
BTM
Transmission
module
CMM
Power module
Heat
exchanger
TRM
TRM
Internal
communication bus
A
E
M
Um
interface
The main functions of each module are as follows:
1. Controller & Maintenance Module (CMM)
CMM implements Abis interface processing, BTS operation &
maintenance, clock synchronization and generation, internal/external
alarm collection and processing and other functions.
2. Transceiver Module (TRM)
TRM controls and processes the radio channels; transmits and receives
the radio channel data; modulates and demodulates the base-band
signals on the radio carrier; and transmits and receives radio carriers
in the GSM system.
The TRM is divided into three units by function:
i. Transceiver Process Unit (TPU)
The TPU implements all functions of base-band data processing of
all duplex channels on a TDMA frame, and the conversion between
the LapDm protocol and the LapD protocol. In addition, it provides
GPRS data service, and supports CS1, CS2, CS3 and CS4 encoding
modes.
ii. Radio Carrier Unit (RCU)
The RCU modulates baseband signals to carrier signals and upconverts frequency. At the same time, it down-converts the
frequency of received carrier signals. In addition, it can control the
power statically and dynamically in the downlink direction as
required in GSM specifications.
Confidential and Proprietary Information of ZTE CORPORATION 7
ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
iii. Power Amplifier Unit (PAU)
The PAU amplifies the power of the radio carrier to provide the BS
equipment with sufficient transmission power.
In band GSM900 or EGSM900, ZXG10 OB06 features a transceiver
unit with an output power of 80 W. The unit consists of two
modules: STRG and SPAG: The former fulfills the functions of the
TPU and RCU parts, while the latter accomplishes the functions of
the PAU. The SPAG and STRG form the TRM of the GSM900 system
or the EGSM900 system.
3. Antenna Equipment Module (AEM)
The AEM accomplishes functions of duplex and distribution of air
signals. ZXG10 OB06 provides a Combiner Distribution Unit (CDU) and
a Combiner Extension Unit (CEU):
i. The CDU supports one 2-in-1 combiner unit and one 1-to-4
distribution unit. It has two low noise amplifiers with extended
receiving output and one built-in duplexer.
ii. The CEU supports two 1-to-2 power distribution units and two 2-in-
1 combiner units.
The AEM can provide the ZXG10 OB06 (V1.0) with different
configurations through combinations.
4. Backplane Transmission Module (BTM)
The BTM is responsible for transmitting messages between the CMM,
TRM and AEM and at the same time provides interfaces for inputting
and outputting external signals.
5. Transmission Management Module (TMM)
The TMM can be a product manufactured by a third party. In ZXG10
OB06 there is a standard 19-inch 3U-high shelf for accommodating
transmission devices such as SDH and microwave.
6. Heat Exchanger (HEX)
The HEX is composed of four key components, namely, internal
circulation fan, external fan, heat exchanging chip and heater. The HEX
provides a function of dissipating heat in case of high temperature and
heating in case of low temperature, so that suitable temperature will
be ensured in the cabinet for normal operation of the system.
7. Power Module (PWM)
The PWM accomplishes lightning protection and rectification/filtration
of AC power: It outputs AC 220 V power to the heat exchanger and the
maintenance socket; converts AC power to DC –48 V power for the
CMM, TRM, TMM and heat exchanger, and provides a function of
overload/short circuit protection.
Software Architecture
In software design, the ZXG10 OB06 (V1.0) adopts modular and
hierarchical concepts to facilitate development and maintenance.
8 Confidential and Proprietary Information of ZTE CORPORATION
Chapter 1 - System Architecture
The software is distributed on boards. There is little correlation between
pieces of software. The board software is independent in function and
associates with each other through the internal interfaces.
The core software can be downloaded from the background, facilitating
service upgrade and version maintenance. It also provides external
interfaces, through which the software can be maintained, OB06
information can be collected, and OB06 local tests can be performed.
The internal software of ZXG10 OB06 (V1.0) is composed of four parts:
Controller & Maintenance Module (CMM), Frame Unit Controller (FUC),
Channel Codec Module (CHP) and Carrier Interface Processor (CIP).
Different software platforms are adopted for the software according to
their functions, as shown in Figure 6.
FIGURE 6 SOFTWARE MODULES OF THE ZXG10 OB06 (V1.0)
CMM software module
software
System
FUC software module
CHP software module
CIP software module
CMM
The CMM of ZXG10 OB06 (V1.0) provides the following functions:
Status management;
Configuration management
Device management;
Monitoring management
Test management
Database management
Supporting local O&M function, including local parameter configurations
and alarm query
Confidential and Proprietary Information of ZTE CORPORATION 9
ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
The CMM software is designed in layers, as shown in Figure 7.
FIGURE 7 CMM SOFTWARE MODULE STRUCTURE
APP
LMU
DBS
OSS
RUNCTRL
RUNSPT
pSOS+
BSP
Hardware
O&M
LNKCTRL
LNKDRV
The five layers from the top downward are as follows:
1. Hardware
The physical platform on which the CMM software is running.
2. BSP (board-level support package)
BSP initializes CMM boards and provides drivers for the relevant parts
of the equipment. It provides consistent operation interfaces for the
specific details of the upper-level encapsulated hardware equipment
and simplifies the OSS design.
3. pSOS + operating system
It is a real-time multi-task operating system for commercial purposes
and with superior performance. The operating system has been
successfully applied to the next-generation BTS.
4. Operation support system (OSS) layer
This layer consists of the following parts:
i. RUNSPT
It is the core layer of the OSS.
It is a dispatch system of the state machine, providing process
dispatch, process communication, memory management, timer
management, process monitoring and abnormality capture.
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Chapter 1 - System Architecture
ii. RUNCTRL
It is the operation control layer of the system.
It includes the system control module and implements the poweron sequence for application processes. In addition, this layer
includes some miscellaneous functions of the operating system
such as redirection of the printing messages.
iii. LNKDRV
It is the device driver.
Working with BSP, LNKDRV provides equipment-independent
drivers for LNKCTR. At the same time, this part also includes a
frame number synchronization module, implementing the frame
number synchronization between active/standby CMMs, active
CMMs of the base cabinet and the extension cabinet, and master
CMM and TRMs.
iv. LNKCTRL
It is the communication link control layer module.
It consists of multiple communication link control modules, like
LapD, HDLC, LMComm.
LapD communication link control module
LapD is the communication link control module of the Abis interface.
HDLC communication link control module
HDLC is the communication link control module inside the cabinet.
They all communicate in a point-to-point way.
Currently, there are three types of communication links:
CCComm: It is the auxiliary communication link between the
master CMM of the base cabinet and that of the extension cabinet.
Physically, it is a 2 M PCM line, which facilitates the centralized data
collection of LMU.
CMComm: The communication link between the active and standby
CMMs, implementing the data synchronization between them.
Physically, it is a 1M HW.
CTComm: As the communication link between the active CMM and
1 ~ 12 TRMs of its cabinets, the CTComm implements the
parameter configuration of TRM and alarm collection. Physically, it
uses a 64 Kbit/s timeslot in 4 M HW.
LMComm
Foreground/background link control module with RS232 as its
physical interface. It is a self-defined point-to-point link control
protocol and character-oriented single-bit stop and wait protocol.
5. APP layer
It is the application layer. It consists of three parts:
i. O&M
As the core of the application layer, it receives the O&M messages
of the Abis interface and implements parameter configuration,
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ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
status and alarm management, software version management,
device test and external alarm collection.
ii. DBS
The whole application layer is designed with the database as a core.
The database coordinates to assign configuration parameters. It
also synchronizes data between the active and standby CMMs and
between the foreground and the background.
iii. LMU
It is the local O&M unit, including two parts: foreground agent and
background operation interface.
It works with the database synchronization module to complete the
local parameter configuration, equipment status and alarm
collection. It also includes operating interface of equipment test to
implement test functions of the local BTS.
The system tool part is a series of developer-oriented tools for
system diagnosis and test to rapidly locate faults.
FUC
The FUC software module is located in the TPU of the TRM module. It
processes the radio signaling over every radio carrier and signaling on the
BSC interface and manages all channels. Its major functions are as follows:
1. It processes and converts GSM signaling protocols, including the layer2 protocol LAPD with BSC, the layer-2 protocol HDLC with CMM, the
layer-2 protocol LAPDm with the Um interface and the layer-3 radio
resources management protocol of GSM.
2. It is responsible for the TDMA multi-frame framing on the Um interface,
frame number (FN) receiving, frequency hopping calculation and
management & control over CHP.
3. It manages OB06 and loads the FUC software and DSP program. It
supports packet switching services (GPRS or PS for short).
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Chapter 1 - System Architecture
The whole FUC software can be divided into two layers: system software
and application, as shown in Figure 8.
FIGURE 8 FUC SOFTWARE MODULE
APP
OAMM
RUNCTRL
RUNSPT
RSM
OSS
LNKCTR
LNKDR
pSOS+
BSP
Hardware
LMA
The concept of virtual operating system is adopted for the system software.
Based on the commercial operating system pSOS+, the running support
layer RUNSPT of the limited state machine is oriented to make the
application irrelevant with the actual real-time operating system, simplify
the application implementation and improve the application grafting.
RUNCTRL implements the power-on boot sequence of system’s modules
and some auxiliary functions of the operating system. It collects and
redirects the output messages.
The drivers are also designed with a hierarchical structure, including
equipment-dependent and equipment-independent drivers. All
communications within the current equipment adopt the address transfer
mode to reduce the overhead of the memory block copies.
The application layer contains the operation and maintenance module
(OAMM), radio signaling processing module (RSM) and local O&M agent
module (LMA). The OAMM configures and manages the software,
parameters, status and alarms of the TPU board. The RSM can be divided
into the FURRM (Radio Resource Management Module), PAGCHM (Paging
Access Channel Message Processing Module) and FHM (Frequency Hopping
Module). These modules implement the signaling flows of circuit switched
service and packet switched service according to the GSM protocol, and
they support frequency hopping. LMA is used for system debugging.
CHP
The CHP software module is located in the TPU of the TRM in the system.
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ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
It implements all baseband channel processing and some corresponding
control functions, including channel encoding, channel decoding and
demodulation.
CIP
The CIP software module is located in the TPU of the TRM in the system.
The functions of CIP software are GMSK (GSM modulation mode), 8PSK
(EGPRS modulation mode), software modulation, power control and the
collection and handling of AEM, amplifier, RCU and fan alarm information.
System Features
The ZXG10 OB06 (V1.0) is a compact outdoor BTS with a high capacity; a
single cabinet may support 6 carriers at the maximum; customer
requirements in terms of capacity, configuration, arrangement and
maintenance are all taken into consideration in its design.
The main features of the ZXG10 BS21 are as follows:
1. High jumping-off point in technology
The ZXG10 OB06 (V1.0) starts from the new generation of GSM
technology, and the standards of GSM Phase II are adopted. It can be
upgraded to GSM Phase II+ smoothly.
2. Advanced functions, covering all frequency bands and supporting
flexible configurations
The ZXG10 OB06 (V1.0) supports functions defined in GSM
specifications and flexible configurations according to the customer’s
requirements. It also supports mixed insertion of modules of different
frequency bands, such as GSM1900/1800, GSM900/1900.
GSM850/1800, and GSM850/1900; it supports star, chain and tree
connections of PCM links; it supports FH; it supports configurations
with 40 W and 80 W power.
3. Strong environmental adaptability
The ZXG10 OB06 (V1.0) allows normal operation in an adverse outdoor
environment.
The cabinet features a framework of double-layer section aluminum
and a base of bended aluminum alloy plate, which are good in erosion
resistance and electric conduction.
Thanks to the sealing strips between the cabinet door and the racks,
and between the HEX and the door plate, the cabinet is well sealed,
and becomes a consecutive conductor as well, thus satisfying the
requirements by the EMC.
The integrated equipment permits protection of IP55 level.
4. Beautiful appearance and compact structure
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Chapter 1 - System Architecture
ZXG10 OB06 (V1.0) looks concise, features compact structure, high
performance of electromagnetic shielding and good heat dissipation.
Both the front door and back door of the cabinet can be opened to
facilitate maintenance.
5. Modular design in software/hardware.
The software/hardware of the ZXG10 OB06 (V1.0) is of a modular
design to reduce the types of its boards and modules, enhance the
integration of the boards, facilitate installation and maintenance for the
projects, and improve the reliability of the system.
6. Advanced software radio technology.
With the advanced software radio technology, the ZXG10 OB06 (V1.0)
ensures that the RF components would work stably and reliably. It
improves the consistency of the equipment in batches and the massive
production of the equipment.
7. Flexible and reliable Abis interface
Advanced flow control algorithms and variable rate signaling link
technology are used so that multiple logical signaling links can be
configured on the 64 Kbit/s physical link to fully share the bandwidth.
In case of ZXG10 OB06 (V1.0) cascading, if one ZXG10 OB06 (V1.0) is
powered off, the Abis interface link can provide auto-bridging
protection.
8. Secure and reliable power supply system.
The power supply module of the ZXG10 OB06 (V1.0) provides such
functions as lightning protection and electromagnetic filtration. The
PSM provides AC input protection (overvoltage/undervoltage protection)
and DC output protection (overvoltage/undervoltage protection),
lightening/surge prevention, burst interference resistance, cycle drop
prevention, conduction interference resistance and anti-
electromagnetic radiation functions.
Since there will be nobody on duty for an outdoor BTS, the power
system is configured with an intelligent control function for equipment
start to protect the system, that is, when the temperature is lower
than -20˚C, the DC output will be automatically cut off, and when the
temperature is higher than -20˚C, the DC output will be automatically
restored.
The power system accommodates external high-capacity batteries, and
provides a function for management of secondary power down and
batteries.
9. Perfect environment monitoring capability
Internal smog, flood and over-high/over-low temperature can be
detected automatically.
10. Good heat design
The system features direct heat dissipation by wind. Fans of high wind
pressure and large wind capacity are used, thus ensuring quick and
effective heat dissipation for the modules.
Independent air ducts are designed for the AEM and TRM, so that the
distance of heat dissipation is shortened for higher efficiency.
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ZXG10 OB06 ZTE Integrated Outdoor GSM Base Station Technical Manual
High-capacity heat exchangers are used for more powerful heat
dissipation capability of the system.
The cabinet features a double-layer top, thus effectively alleviating the
influence of direct sunshine. The cabinet surface is covered with
painting resisting infrared radiation.
11. Convenient local operation and maintenance
Standard RS232 interface is used for connection with the local
operation and maintenance terminal.
The local operation and maintenance terminal is easy to learn and use
since it is consistent with the OMCR interface.
Perfect local operation and maintenance
Rapid and reliable online software upgrade.
12. Abundant services
The ZXG10 OB06 (V1.0) supports GPRS data services, HLR services,
large area coverage and satellite Abis links.
16 Confidential and Proprietary Information of ZTE CORPORATION
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