Introduction to ZXSDR Products (GSM) (V2009-R1.0

Introduction to ZXSDR Products Internal Use Only▲

Introduction to ZXSDR Products (GSM)
(V2009-R1.0)

ZTE CORPORATION

Confidential and Proprietary Information of ZTE CORPORATION.

Introduction to ZXSDR Products (GSM)
(V2009-R1.0)

Planned by: Engineering Service Division , Mobile Product Support Center , ZTE Corporation

Complied by: Zhao Yanghao
Reviewed by: Liu Zike Zhang Huamin

* * * *

ZTE CORPORATION

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Post code: 518057

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Fax: +86 755 26770801

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Preface
ZXSDR is the new BTS product by ZTE Corporation. This document aims to
make the readers know its background, technique features and commissioning
method.



Content
1. What is SDR................................................................................................................................................1
1.1 Challenge in the Development of Communication Technology............................................................1
1.2 SDR Concept..........................................................................................................................................1

2. ZTE SDR Solution......................................................................................................................................2
2.1 Why to Select ZXSDR Series BTS........................................................................................................2
2.1.1 High-integrity...............................................................................................................................3
2.1.2 Flexible Architecture....................................................................................................................3
2.1.3 Multiple New Functions...............................................................................................................4
2.1.4 Lower Cost...................................................................................................................................4
2.2 Main Differences Between ZXSDR and Traditional 2G BTS...............................................................4
2.2.1 uTCA-based..................................................................................................................................4
2.2.2 BBU+RRU Architecture..............................................................................................................5
2.2.3 Introduction to OMCB.................................................................................................................6
2.2.4 IP Abis Interface...........................................................................................................................6
2.2.5 Multi-carrier Combination...........................................................................................................7
2.3 ZXSDR BTSs.........................................................................................................................................7
2.3.1 ZXSDR B8200.............................................................................................................................8
2.3.2 ZXSDR R8860 Hardware Structure...........................................................................................12
2.3.3 ZXSDR BS8800 GU360 Hardware Structure...........................................................................14
2.3.4 ZXSDR BS8900 GU360 Hardware Structure...........................................................................16
2.4 Conditions for the Subscription of SDR..............................................................................................18

3. ZTE SDR Networking..............................................................................................................................19
3.1 From the Angle of Abis Interface.........................................................................................................19
3.2 From the Angle of Network Topology.................................................................................................20
3.2.1 Networking of BBU and RNC/BSC..........................................................................................20
3.2.2 Networking of BBU and RRU...................................................................................................21
3.3 From the Angle of O&M......................................................................................................................23
3.3.1 Networking Sample....................................................................................................................23



4. ZXSDR Series BTS Hardware Installation............................................................................................25
4.1.1 B8200 Hardware Installation.....................................................................................................25
4.1.2 B8860 Hardware Installation.....................................................................................................29
4.1.3 B8200+R8860 Installation and Distribution Diagram...............................................................32

5. ZTE SDR Commissioning........................................................................................................................33
5.1 SDR BTS Commissioning Flow..........................................................................................................33
5.2 OMCR Data Configuration..................................................................................................................35
5.2.1 BSC Global Resource Configuration.........................................................................................36
5.2.2 Board Configuration of Abis and OMCB Interfaces.................................................................37
5.2.3 IP-Related Configuration...........................................................................................................39
5.2.4 Configuring a B8200 Site Under the OMCR.............................................................................43
5.3 OMCB Data Configuration..................................................................................................................46
5.3.1 Creating A SDR Management NE..............................................................................................46
5.3.2 Applying for Exclusion Right for the Management NE............................................................47
5.3.3 Creating A BTS Configuration Set.............................................................................................48
5.3.4 Physical Configuration...............................................................................................................49
5.3.5 Transmission Configuration.......................................................................................................50
5.3.6 Clock Configuration...................................................................................................................52
5.3.7 Optional Configuration..............................................................................................................52
5.3.8 Radio Configuration...................................................................................................................53
5.4 LMT Installation and Data Configuration............................................................................................54
5.4.1 SDR Logging in to the SDR with the Debugger........................................................................54
5.4.2 Configuring the SDR BTS Through the LMT...........................................................................54
5.4.3 Basic Property Configuration.....................................................................................................54
5.4.4 Physical Configuration...............................................................................................................55
5.4.5 Transmission Configuration.......................................................................................................56
5.4.6 Radio Configuration...................................................................................................................58
5.5 Data Synchronization Between the Foreground and the Background.................................................59

Appendix........................................................................................................................................................61



1. What is SDR
1.1 Challenge in the Development of Communication Technology
With the increasing communication demands, new technologies come out in
succession. The common concern for communication operators and equipment
suppliers is how to upgrade equipment more flexibly and protect the investment
of operators to greatest extent in the continuous technology updates.

The SDR concept is proposed for this problem.

1.2 SDR Concept
The software defined radio (SDR) is defined as radio in which some or all of
the physical layer functions are software defined.

The traditional communication equipment, namely the hardware radio (HR),
functions through the hardware. Therefore, functions are often improved by
upgrading the equipment. SDR uses the hardware as a general processing
platform and functions through the software. Thus, it provides a more flexible
and low-cost solution. It also supports multiple systems, bands, and functions
through the software.

Figure 1.2-1 SDR Technology Facilitates the Function Improvement of Communication

System



2. ZTE SDR Solution

Now we have known what SDR technology is. Let’s take a look at SDR
products. First, read the following news:

“On the just-concluded 2008 broadband world forum (BBWF), B8200 and
R8860, the innovative SDR products of ZTE, stood out from various solutions,
winning the InfoVision award issued by IEC. BBWF, hosted by IEC, is an
authorized grant event of the global broadband industry. The InfoVision award
is designed for commending those significant technologies, applications,
products, innovations, and services with special meaning and value in the
Telecom industry. The awardees include enterprises and individuals that have
developed innovative technologies and made great contributions to the society.
Once again, ZTE boasts its leadership in the radio technology field by winning
the top-level award with the innovative SDR product. “(www.sina.com)

However, how can ZTE SDR products (ZXSDR) receive such a honor?

2.1 Why to Select ZXSDR Series BTS
ZTE SDR serial BTS are a brand-new series of radio products designed and
produced by ZTE. They use the advanced SDR technology and their hardware
structure is based on the uniform µ C
T A platform of ZTE, innovatively
supporting multiple radio access methods, including GSM, UMTS, CDMA2000,
and WiMAX. In addition, SDR can be smoothly evolved into the Enhanced
EDGE/LTE.

Currently, the GSM networking mainly uses three types of SDR BTS: the first is
indoor macro BTS, such as ZXSDR B8800 GU306; the second is outdoor macro
BTS, such as ZXSDR B8900 GU306; the third is distributed BTS in which BBU is at
the local end and RU is at the remote end (RRU), such as ZXSDR B8200 GU360 +
ZXSDR B8860 GU906/GU186. For the structure, see Figure 2.1-2.



Figure 2.1-2 Distributed BTS

Compared with the traditional BTS, SDR has the following features aside from
supporting multiple systems such as GSM and UMTS.

2.1.1 High-integrity

 Based on the All-IP transmission structure.

 Support RU of multiple bands.

 BBU supports 60TRX, and RU supports 6TRX/2TRX.

 RU60 board supports 6TRX, and RU02 board supports 2TRX.

 One fiber supports 24 TRXs.

 2G supports a maximum capacity of S666666 or S12/12/12; 3G supports a
maximum of 12CS; the dual mode supports a maximum of S333 + S666
(GSM + UMTS).

 Support the smooth evolution to LTE and HSPA+

2.1.2 Flexible Architecture

 Support the macro BTS and RRU

 BBU and RU within a cabinet is called a macro BTS. RRU is called a



distributed BTS

 Support FE/GE and E1/T1 (IPOE)

 Do not support the channelized E1/T1 currently

 Support the indoor/outdoor type

 Small size, light weight, energy-saving and environment protection

 Support the technology evolution

2.1.3 Multiple New Functions

 Baseband frequency hopping

 Transmit/receive diversity

 DDT/DPCT

 Multi-carrier combination

2.1.4 Lower Cost

 Reduced unit cost

 Reduced typical networking cost

 Saved ABIS bandwidth

 Reduced operating cost

 Reduced maintenance cost

2.2 Main Differences Between ZXSDR and Traditional 2G BTS
ZXSDR features are described above. Now let's take a look at the main
differences between ZXSDR and traditional 2G BTS.

2.2.1 uTCA-based

uTCA is the abbreviation of the Micro TCA that is the short form of the
advanced Telecom computing architecture (ATCA). As a standard open
architecture, uTCA provides options for communication system design on
various components of different handovers, ports, protocols and functions,
system architecture, redundancy and high availability.



2.2.2 BBU+RRU Architecture

The separation between baseband and RF can maximize their own
advantages. The baseband can obtain the maximum integrity, while RF
focuses on the maximization of its own power and efficiency. Therefore, the
networking is more flexible. After the separation, the baseband part is called
base band unit (BBU), while the RF part is called remote radio unit (RRU).
Their functions are displayed as shown in Figure 2.2-3.

Figure 2.2-3 Separated Structure of Baseband and RF

BTS is divided into BBU and RRU. One BBU can provide baseband resources
for multiple RRU. Functions of BBU and RRU are as follows:

 BBU is responsible for digital baseband signal handling and control
management.

 RRU is responsible for handovers between digital baseband signals and
analog signals between RRU and antenna.

 BBU is connected to RRU through the baseband-to-RF interface, and it
transmits I/Q digital baseband signals and OAM signaling data. To ensure
the real-time transmission, the interface should be an optical interface
physically.

 BBU is connected to BSC/RNC through the Abis/Iub interface.

 RRU accesses MS/UE through the Um/Uu interface.

Note: besides the distributed BTS ZXSDR B8200 GU360 + ZXSDR B8860
GU906/GU186 (see Figure 2.1-2), the baseband and RF of all ZXSDR BTS are
separated. The so-called SDR macro BTS means BBU and RU within a
cabinet. It is still two independent units physically. In addition, BBU in macro



BTS BS8800 and BS8900 uses B8820 directly.

2.2.3 Introduction to OMCB

A traditional 2G BTS (such as BTSV2 and BTSV3) is configured and managed
through OMCR, while the configurations of a SDR BTS should be performed
on LMT or OMCB. OMCR is used to configure some radio data.

The operate and maintenant center for NoedB (OMCB) is the O&M unit that
manages NodeB in the 3GPP. As a dual-mode product supporting GSM and
3G, SDR also supports OMCB. The single-threaded link OMCR → BSC → BTS
is changed into the dual-threaded link OMCB → BTS and OMCR → BSC →
BTS. For BTS, an upper level is added, as shown in Figure 2.2-4.

OMCB OMCR

RNC BSC

SDR

Figure 2.2-4 SDR Network Management Structure

Based on the management mode of WCDMA, the board management,
configuration, software downloading, alarm of all SDRs are implemented on
OMCB. For the dual mode, GSM O&M are transferred to OMCB, while OMCR
only manages the GSM-related radio configuration and status management.
This is the difference for OMCR in SDR environment.

2.2.4 IP Abis Interface

The other major difference for a SDR BTS from a traditional 2G BTS is that the
Abis/Iub uses IP protocol. Its physical bearer can be FE/GE or E1/T1 (IP over
E1/T1), but not the E1/T1 of TDM. If E1/T1 is used, BTS can fully use the



existing transmission equipment to save the user investment; if FE/GE is used,
BTS will obtain more bandwidth, which is oriented to the communication
system evolution to all IP.

2.2.5 Multi-carrier Combination

The multi-carrier combination (MCUM) is the product of the introduction of 3G
OTSR into the GSM system. To satisfy the complicated coverage requirements
and special applications of high-speed movement (such as high-speed railway
and freeway), the SDR can cover a single cell using antennas of different
angles at different positions, that is, the multi-carrier combination coverage.
Use the RRU to solve the problems such as antenna feeder and repeater.
When multiple RRU downlink signals are the same, the uplink will select and
combine one of these signals.

Error: Reference source not found is an example of the multi-carrier
combination application and high-speed railway. Because each cell is covered
by multiple antennas in different positions, the coverage distance of the cell
along the railway is increased significantly, thus effectively reduce the voice
problems caused by inter-cell handovers.

Figure 2.2-5 Multi-carrier Combination Application

2.3 ZXSDR BTSs
As mentioned above, the current GSM networking mainly uses three types of
SDR BTS: the first is the indoor macro BTS, such as ZXSDR B8800 GU306;



the second is the outdoor macro BTS, such as ZXSDR B8900 GU306; the third
is the distributed BTS (a BTS type that the BBU is at the local end, while the
RU is at the remote end (RRU)), such as ZXSDR B8200 GU360 + ZXSDR
R8860 GU906/GU186. For the structure. Now we will give a brief introduction
for the B8200, R8860, BS8800, and BS8900 respectively.

2.3.1 ZXSDR B8200

 ZXSDR B8200 system description

ZXSDR B8200 GU360 is a dual-mode baseband unit based on the uTCA
platform. It can support the GSM or UMTS system or both, and share the
common control function and transmission.

ZXSDR B8200 GU360 supports a maximum of 60 GSM carriers, or 12
UMTS carrier-sectors.

 ZXSDR B8200 hardware structure

For ZXSDR B8200, see Figure 2.3-1. The cabinet is 2U high and 19 inch
wide, and is easy to be inserted with a 19 inch standard rack.

Figure 2.3-6 ZXSDR B8200

For the board function and interface of the ZXSDR B8200, see Figure 2.3-
2.



Figure 2.3-7 ZXSDR B8200 Board and Interface (slot numbers in red)

In the figure, the two rightmost boards inserted vertically are the dustproof
mesh and fan modules. Other boards are:

 Clock and control module (CC):

a) Function: frame management, GPS/BITS clock access, Abis/Iub
interface, Ethernet switch (switch between the signaling stream
and media stream)

b) Location: fixed in slot 1 or 2. You can insert one or two
(active/standby) boards.

 Network switch module (FS):

a) Function: provide the interface between the BBU and RRU to
switch the baseband IQ data.

b) Location: fixed in slot 3 or 4. You can insert one or two (for load
sharing) boards.

 Baseband processing board (BP):

a) Function: the BP board can be divided into two categories: the
UBPG (common GSM baseband processing board) supporting
the GSM, which modulates/demodulates 12 IQ channels, and
supports baseband FM and dynamic/static power control; the
BPC (baseband processing C board) supporting the UMTS,



which is also responsible for operations such as coding/decoding
and power control. For the dual modes, both UBPG and BPC
should be inserted.

b) Location: slot 5, 6, 7, or 8, or slot 3 or 4 (only one is inserted,
because the FS needs a slot). All BP boards are oriented to the
sharing operation.

 Field alarm module (SA):

a) Function: provide 8 E1/T1 interfaces, dry contact interfaces (6
inputs + 2 inputs/outputs), and alarm monitoring.

b) Location: fixed in slot 13.

 Power management module (PM):

a) Function: provide -48 V DC input, and the power management
function such as over-/under-voltage protection.

b) Location: insert one or two (active/standby) boards in slots 14
and 15.

For the external interface of the B8200, see Figure 2.3-2. For the function
of each interface, see Table 2.3-1.

Table 2.3-1 ZXSDR B8200 External Interfaces

Remote
Local Cable Cable
Cable
No. Connection Cable Name Cable Usage Medium/Typ
Connection
Position e
Position
Optical
CPRI CPRI Connect the BBU single
interface of the
1 interface on interface and the RRU, and mode optical
FS board on
the RRU cable transmit IQ signals fiber
the B8200
Power 10 square
interface of the B8200 B8200 power supply millimeter
2 DC -48 V
PM board on power cable cable power
the B8200 supply cable
MON on the
3 PM board on
the B8200
4 DB44 lug of E1 stub SA panel Connect E1 signal



Remote
Local Cable Cable
Cable
No. Connection Cable Name Cable Usage Medium/Typ
Connection
Position e
Position
from the
the SA panel optical
cable
line terminal on
the DDF rack
DB9 lug of External Connect
line
the SA panel debugging RS232/RS485 serial
line equipment port cable
DB25 lug of
Position to Connect dry contact
the SA panel
be monitored signal cable
line
EXT external
EXT communication port
interface of the (485 or PP1S+/2M+
5
CC board on interface) which is
the B8200 connected to the
external receiver
REF port of GPS GPS
Receive the GPS
6 the CC board lighting antenna
signals
on the B8200 protector feeder cable
Connect the Ethernet
ports between the BBU
ETH0
GE and RNC. This port is
interface
IP network electrical categorized into two
7, (electrical RJ45 UTP
connected to interface types: Ethernet optical
8 interface) of CAT-5/CAT-6
the RNC cable of the interface and electrical
the CC board
Iub interface interface
on the B8200
(10M/100M/1000M
adaptive)
Used for the
ETH1
GE cascade, debugging, or
interface
IP network electrical local maintenance of
(electrical RJ45 UTP
9 connected to interface the BBC, and the
interface) of CAT-5/CAT-6
the RNC cable of the Ethernet electrical
the CC board
Iub interface interface(10M/100M/10
on the B8200
00M adaptive)



2.3.2 ZXSDR R8860 Hardware Structure

 ZXSDR R8860 system description

ZXSDR R8860 is the outdoor dual-mode RF remote unit in the ZXSDR
serial BTSs. The core of the R8860 is the multi-carrier technology. The
R8860 can be used as the RF unit of the GSM or UMTS independently,
and can be operated in both GSM and UMTS systems simultaneously. It
forms the dual-mode BTS with the BBU.

When the R8860 is used as the RF unit of the GSM, it can support 1 - 6
carriers; when it is used as the RF unit of the UMTS, it can support a
maximum of four carrier-sectors; when it is operated in both GSM and
UMTS systems, it can support a maximum of four GSM carriers + one
UMTS carrier-sector.

The R8860 can be categorized into ZXSDR R8860 GU906 and ZXSDR
R8860 GU186.

 The GU indicates that the GSM and UMTS dual modes are
supported.

 The 906 indicates that the GSM900 and UMTS900 are supported,
and the transmitting power is 60 W.

 The 186 indicates that the GSM1800 and UMTS1800 are supported,
and the transmitting power is 60 W.

 ZXSDR R8860 hardware structure

For the ZXSDR B8860, see the following figure.



Figure 2.3-8 ZXSDR R8860 Appearance

For the external interfaces of the B8860, see the following figure.

Figure 2.3-9 ZXSDR R8860 External Interfaces

For the connections between interfaces and cables, see Table 2.3-2.

T 2.3-2 ZXSDR R8860 External Interfaces

No. Label Interface Interface Type/Connector



Interface between
1 LC1 BBU and RRU/RRU LC optical interface (IEC 874)
cascading interface
Interface between
2 LC2 BBU and RRU/RRU LC optical interface (IEC 874)
cascading interface
AISG device 8-core aerial socket (IEC 60130-9-
3 AISG
interface ED)
External device
4 Mon interface (monitoring, 37-core aerial socket
LMT, etc.)
DC interface: connector
5 DC IN Power interface XCG18T4K1P1-01+XC18FJJP1-10.5
Cable cross-sectional area: 1.5mm²
Receive diversity RF
6 RX 50Ω DIN connector
cable interface
Receive/Transmit
7 RX/TX main set RF cable 50Ω DIN connector
interface
Frequency
8 RXout N-KY (MIL-C-39012 or IEC 169-16)
expansion interface
Frequency
9 RXin N-KY (MIL-C-39012 or IEC 169-16)
expansion interface
Equipment
10 GND Cable cross-sectional area: 35mm²
grounding

2.3.3 ZXSDR BS8800 GU360 Hardware Structure

 BS8800 system description

The BS8800 GU360 is a dual-mode indoor macro BTS, supporting both
GSM (850M/900M/1800M/1900M) and UMTS
(850M/900M/1800M/1900M/2.1G) radio systems simultaneously. It can act
as a GSM/UMTS macro BTS independently, and support the soft base
station in some bands (850M/900M/1800M/1900M). The appearance is
shown as in Figure 2.3-5.

The single cabinet of the BS8800 GU360 supports a maximum of 36 GSM



carriers. When the station configures more than 36 carriers, you can add
an auxiliary cabinet of 36 carriers capacity. In Figure 2.3-5, cabinet 2 is the
main cabinet, and cabinet 1 is the auxiliary cabinet.

Figure 2.3-10 ZXSDR BS8800

 BS8800 hardware structure

The baseband and the RF are separated in the BS8800 GU360. For the
internal structure, see Figure 2.3-6. In the figure, the baseband is B8200,
and the RF has three options:

 RU60: it is the dual-mode multi-carrier RF unit, supporting six GSM
carriers, four UMTS carrier-sector, four GSM carriers + one UMTS
carrier-sector, or two GSM carriers + two UMTS carrier-sectors.

 RU02: it is the GSM single-mode double-density RF unit, supporting
two GSM carriers.

 RU40: it is the UMTS single-mode multi-carrier RF unit, supporting
four UMTS carrier-sectors.



Figure 2.3-11 ZXSDR BS8800 Internal Structure

2.3.4 ZXSDR BS8900 GU360 Hardware Structure

 BS8900 system description

The BS8900 GU360 is a dual-mode indoor macro BTS, supporting both
GSM (850M/900M/1800M/1900M) and UMTS
(850M/900M/1800M/1900M/2.1G) radio systems at the same time. It can
act as a GSM/UMTS macro BTS independently, and support the soft base
station in some bands (850M/900M/1800M/1900M).

The single cabinet of the BS8900 GU360 supports a maximum of 36 GSM
carriers. When the station configures more than 36 carriers, you can add a
RF cabinet or an auxiliary station-supported cabinet supporting the RF



unit.

 BS8900 hardware structure

The baseband is separated from the RF in the BS8800 GU360. The
baseband is B8200, and the RF has three options:

 RU60: it is the dual-mode multi-carrier RF unit, supporting six GSM
carriers, four UMTS carrier-sector, four GSM carriers + one UMTS
carrier-sector, or two GSM carriers + two UMTS carrier-sectors.

 RU02: it is the GSM single-mode double-density RF unit, supporting
two GSM carriers.

 RU40: it is the UMTS single-mode multi-carrier RF unit, supporting
four UMTS carrier-sectors.

The BS8900 GU360 can configure the following cabinets:

 Station-supported cabinet BC8910: it is used to store the power
system, baseband pool unit, heat exchanger, and transmission
equipment.

 Station RF cabinet RC8910: it is used to store the RF.

 Station-supported cabinet RC8911: it is used to store the RF unit and
battery.

 Station-supported cabinet RC8931: it is used to store the RF unit and
storage battery.

 Battery cabinet PC8910: it is used to store the storage battery.

The BS8900 GU360 can form multiple combinations by the above
cabinets. Where, the BC8910, RC8910, RC8911, and PC8910 share the
same appearance and size. For the appearance and internal structure of
the RC8931 + BC8910 + RC8910 combination, see Figure 2.3-7.



Figure 2.3-12 ZXSDR BS8900 Appearance and Internal Structure (A Combination)

2.4 Conditions for the Subscription of SDR
Now we have a preliminary concept of the SDR. Let’s take a look at the
conditions for the subscription of the SDR.

 The iBSC needs an IP interface board IPBB (the physical board is BIPI
(100 M) or GIPI (Gigabit)) to provide the FE interfaces for the SDRs of the
OMCB and FE Abis.

 If the Abis interface is E1/T1, the DTB and EUIP (the physical board is
EIPI) should be configured as the interface board of the IP over E1/T1.

 The iBSC version should be iBSCV6.20 or later.

 The iSMG version should be iSMGV6.20 or later.

 The NetNumen version should be MinosV6.10.410d or later.



3. ZTE SDR Networking

Now we know so many advantages of the SDR, but how to use the SDR? In
this chapter, we will learn this point, including networking, installation, and
commissioning.

Let’s start with the SDR networking. Each network shows different networking
figures at different angles. So does the SDR BTS networking. Let’s learn the
SDR networking from three angles: Abis networking interface, BSC/BBU/RRU
topology, and the O&M network management of the SDR.

3.1 From the Angle of Abis Interface
Currently, the SDR BTS only supports the IP Abis interface. Its physical bearer
can be FE/GE or E1/T1 (IP over E1/T1), but can not be the TDM E1/T1.

When the FE/GE is used, the networking of the SDR and BSC is as shown in
Figure 3.1-1. This networking can obtain more transmission bandwidth.

Router

Switch
P C M/X .2 5/DDN. .
.
BBU
Router

Switch
iBSC

Figure 3.1-13 The Networking when the Abis Interface Uses the FE/GE

For E1/T1, the networking of the SDR and BSC is as shown in Figure 3.1-2.
This networking can fully use the existing transmission equipment and save the
user investments.



SDH
DDF

Transmission cable
.
BBU
SDH

DDF

iBSC

Figure 3.1-14 The Networking when the Abis Interface Uses the E1/T1

3.2 From the Angle of Network Topology
The network topology of the SDR can be categorized into the networking of
BBU and RNC/BSC and the networking of BBU and RRU.

3.2.1 Networking of BBU and RNC/BSC

The networking of BBU and RNC/BSC is categorized into star and chain, as
shown in Figures 3.2-1 and 3.2-2. The networking of the SDR macro BTS
B8800/B8900 and RNC/BSC is the same as that of the BBU and RNC/BSC.

 For the star networking, the BSC/RNC in each site will introduce n
transmission links directly, and all the BTS equipment on each site are the
end equipment. See Figure 3.2-1. The star networking features simple
networking, convenient maintenance and engineering, less processes for
signals, and high reliability of the line. However, the star networking
demands the most transmission lines compared with other networks.



Figure 3.2-15 BBU Star Networking

 Chain networking

The chain networking is used for band-distributed, low line density areas,
such as freeways and railways. Theoretically, the B8200 supports five-
level cascades. However, to avoid the deterioration of the clock
performance, the number of BTS cascades in the chain networking should
not higher than level 4, as shown in Figure 3.2-2.

The chain networking can save a lot of transmission equipment. But
because the signals should pass many processes, the line is reliable.

Figure 3.2-16 BBU Chain Networking

3.2.2 Networking of BBU and RRU

The networking of the BBU and RRU is categorized into star and chain.

 Star networking



The ZXSDR B8200 GU360 can use the star networking, and use the fiber
for the transmission. Its networking is shown as in Figure 3.2-3. The
ZXSDR B8200 GU360 can form a star network with a maximum of 12
RRU star.

Figure 3.2-17 RRU Star Networking

 Chain Network

For the chain networking, the RRU is connected to the RRU of the ZXSDR
B8200 GU360 or cascade through the optical fiber interface. See Figure
3.2-4. The ZXSDR B8200 GU360 supports a maximum of level 4 RRU
chain networking. The chain networking is applicable for band-distributed,
low line density areas. It can save a lot of transmission equipment.



Figure 3.2-18 RRU Chain Networking

3.3 From the Angle of O&M
3.3.1 Networking Sample

Remember what is OMCB? In the above chapter, we know that the difference
between the SDR and the traditional 2G BTS is that the SDR BTS has two
network managements: one is OMCR, the other is OMCB. Most of the
operations are performed on the OMCB. See Figure 2.2-2 if you can not recall
it. In the actual networking, the OMCB and OMCR can be installed on two
independent servers, or be integrated into a network management (iSMG) and
installed in a server (SBCX). How the OMCB communicates with the SDR
then?

 Networking Description

When the OMCB and OMCR are deployed in combination, they are still
two independent network management units logically. They are just
installed on the SBCX board physically. Then, the iBSC should provide two
sets of IP interfaces which will be connected to the SDR BTS and OMCB
server; the iBSC should be configured with a virtual address (RPU
interface address). The networking is shown in Error: Reference source
not found.

 The connection between the SDR and BSC: for physical E1 access,
the interface board at SDR side is the SA, while the interface board at
BSC side is DTB (should work with EUIP to implement the IP access);
For FE/GE access, the interface board at SDR side is CC, while the


interface board at BSC side is IPBB.

 Connection between the OMCB and BSC: For FE/GE access, the
OMCB interface is the external network interface of the SBCX. It is
usually the HEART1. The IPBB is used at BSC side.

IPBB_SDR/
OMCB IPBB_OMCB RPU SDR
EUIP_SDR

139.1.1.200 139.1.1.254 118
.18.1.1 118
.18.2.254 18
.18.2.100

Switch

Figure 3.3-19 OMCB O&M System Network Topology



4. ZXSDR Series BTS Hardware
Installation

This chapter describes the BTS installation of the SDT. As the macro BTS
installation of the SDR is the same as that of other macro BTSs, no more
detailed will be given here. But it is easy and flexible to install the distributed
BTS, because its volume is small and its BBU is separated from the RRU.

4.1.1 B8200 Hardware Installation

ZXSDR B8200 is a 19-inch standard cabinet. It features compact size and easy
installation. It supports several installation methods: indoor stand installation
(19-inch rack, also called gantry support), wall installation, pole installation, and
outdoor installation.

 The most common installation is to use the existing or new indoor floor
stand, which is a 19-inch rack. Besides B8200, it can be installed with
other stand equipment such as a router.

 In wall installation, install the cabinet ZXSDR BC8180 and then the B8200.
The internal structure of the ZXSDR BC8180 is similar to the installation
structure of the indoor floor stand. That is, the ZXSDR BC8180 is a small
indoor floor structure. For its appearance, see Figure 3.3-1. And for its
internal structure, see Figure 3.3-2.



Figure 3.3-1 ZXSDR BC8180 Appearance

Figure 3.3-2 ZXSDR BC8180 Internal Structure



Figure 3.3-3 shows the wall installation when the ZXSDR BC8180 is used.

Figure 3.3-3 ZXSDR BC8180 Wall Installation

 In wall installation, you can also use a simple frame, as shown in Figure
3.3-4: the simple frame is 4U high. You can insert two B8200s or one
B8200 and one lighting arrestor to the frame.

Figure 3.3-4 ZXSDR BC8180 Simple Wall Installation

 In pole installation, also install the cabinet ZXSDR BC8180 first, as shown



in Figure 3.3-5.

Figure 3.3-5 ZXSDR BC8180 Pole Installation

 In outdoor installation, install the outdoor cabinet ZXDU58 W121 and then
B8200. Figure 3.3-6 shows the installation.



Figure 3.3-6 Outdoor Cabinet ZXDU58 W121 Installation

4.1.2 B8860 Hardware Installation

The B8860 can be installed in three methods: wall installation, pole installation,
and floor installation, as shown in Figures 3.3-7, 3.3-8, and 3.3-9
independently.



Figure 3.3-7 ZXSDR R8860 Wall Installation

Figure 3.3-8 ZXSDR R8860 Pole Installation



Figure 3.3-9 ZXSDR R8860 Floor Installation



4.1.3 B8200+R8860 Installation and Distribution Diagram

Figure 3.3-10 B8200+R8860 Installation and Distribution Diagram



5. ZTE SDR Commissioning

5.1 SDR BTS Commissioning Flow
The following figure shows the SDR BTS commissioning flow:

BSC
Commissioning
Installation
Preparation
Commissioning

OMCR Data
Hardware Check
Configuration

Local
OMCB Data
Commissioning of
Configuration
LMT

Installation &
Configuration
Check

No

Is link created?

Yes

Synchronize Data
on Foreground and
Background

Service Testing

End

Figure 5.1-1 SDR Commissioning Flow



SDR hardware installation includes SDR equipment installation and cable
connection.

BSC installation debugging includes hardware installation, background
software installation, BSC data configuration, version management, connection
of A and Gb interfaces, and service test. The background network management
must be installed in the OMCR+OMCB (the iSMGV6.20 supports this).

OMCR data configuration is the data configuration related to the SDR at the
BSC side. It falls into four parts: BSC global resource setting, board
configuration of the Abis interface, IP interface configuration, and radio
parameter configuration of the SDR site.

The OMCB is the operation and maintenance center of the SDR BTS. With it,
you can configure SDR data and remotely maintain the SDR in the
commissioning.

LMT local debugging refers to connect the debugger to the SDR and configure
local data through the LMT software. You can use the LMT to configure
transmission-related information (such as IP address and route), physical
information (such as board and topology relation), and partial radio information
(such as band and central frequency ). You can also use it to manage the SDR
version.

Synchronization between the foreground and the background refers to
transconfigure the data configured on the SDR at the foreground side to the
OMCB at the background side, or synchronize the data configured on the
OMCB at the background side to the SDR at the foreground side after link
establishment between the foreground and the background. Before link
establishment between the foreground and the background, the following four
prerequisites must be satisfied:

 The transmission network runs normally.

 SDR interface-related parameters are correctly configured on the OMCR.

 SDR management NE is correctly created on the OMCB.

 Transmission parameters are correctly configured through the LMT.



Figure 5.1-2 Link Establishment Between the Foreground and Background Requires

Cooperation of Four Prerequisites

Note that LMT configurations are the same as OMCB configurations. When the
SDR is subscribed, configure the data of the BSC side on the OMCR in one of
the following two ways: 1. a. configure all data through the OMCB. b. configure
SDR transmission parameters through the LMT. c. establish a link between the
SDR and the OMCB. d. synchronize the data configured on the OMCB to the
SDR. 2. a. configure all data though the LMT. b. create a SDR management
NE on the OMCB. c. establish a link between the OMCB and the SDR. d.
Transconfigure the SDR data to the OMCB. But the first method is
recommended. The following sections simply describe main steps of this
debugging method.

5.2 OMCR Data Configuration
[Task Purpose]

1. Set the BSC global resource configuration parameters.

2. Configure the Abis interface board and OMCB interface bard of the BSC.

3. Configure the Abis interface, OMCB interface, IP interface of the BSC
virtual address.

4. Configure the logical site and radio parameters of the SDR.

[Task Preparations]

1. The operating system, database and iOMCRV6.20 network management
including the OMCR and OMCB are correctly installed and run normally.

2. The A interface and Gb interface of the iBSC are connected, and the



dialing test is normal.

3. IP addresses of the SDR site, Abis interface on the BSC, OMCB interface,
OMCB interface and the virtual IP address of the BSC are planned. The
module number corresponding to the SDR on the BSC and Abis interface
position are also planned.

5.2.1 BSC Global Resource Configuration

1. Configure the IP addresses of the OMCB and IPabis for the BSC global
resources, as shown in Figures 5.2-1 and 5.2.2.

Figure 5.2-1 Property Configuration of the BSC Global Resources

Figure 5.2-2 iBSC Virtual Address Configuration



5.2.2 Board Configuration of Abis and OMCB Interfaces

 Board configuration of the Abis interface

 When the Abis interface uses IPOverE1, configure the DTB board on
the E1 interface of the Abis interface and add a EUIP board, as shown
in Figures 5.2-3 and 5.2-4.

Figure 5.2-3 PCM Property Configuration



Figure 5.2-4 HDLC Configuration of the EUIP Board

 When the Abis uses FE, configure the IPBB board on the IP interface
of the Abis interface, as shown in Figure 5.2-5.



Figure 5.2-5 Configuration of the IPBB Board to the Abis Interface

 Create a IPBB board connected to the OMCB

The configuration method is the same as the method for configuring the
IPBB board to the FE Abis interface. See Figure 5.2-5.

The IPBB to the OMCB and the IPBB to the SDR can use different
network ports of the same board. But the two ports must be configured in
different network segments.

5.2.3 IP-Related Configuration

 Create an IP Abis interface, as shown in Figures 5.2-6 and 5.2-7:



Figure 5.2-6 Create an IP Interface

Figure 5.2-7 Select the RPU

 Create an IPPB interface for the OMCB, as shown in Figures 5.2-6 and
5.2-8.



Figure 5.2-8 Select IPBB

 Interface configuration when the Abis interface uses E1

 Create an EUIP interface to the E1, as shown in Figures 5.2-6 and
5.2-9.



Figure 5.2-9 Select the EUIP Interface

 Create IPOverE1 and PPP configuration, as shown in Figures 5.2-10
and 5.2-11.

Figure 5.2-10 Create IP Over E1



Figure 5.2-11 Create PPP

 Interface configuration when the Abis interface uses FE. See Figures 5.2-6
and 5.2-12.

Figure 5.2-12 Create the IPBB Interface to the SDR Abis Interface

5.2.4 Configuring a B8200 Site Under the OMCR

 Create a logical site and create a rack and a cell on the site, as shown in
Figure 5.2-13 and Figure 5.2-14. Figure 5.2-15 shows the created site.
Note that it is just a logical site. Thus, no board is displayed on the rack.



Figure 5.2-13 Create a SDR Rack on the OMCR

Figure 5.2-14 Create a SDR Rack on the OMCR



Figure 5.2-15 B8200 Logical Rack on the OMCR

 Configure the transceiver, as shown in Figure 5.2-16. Compared to the
BTS accessed to the traditional E1, the BTS must be configured with IP
information, DSP mark number and port number besides transceiver
information and channel information. See Figure 5.2-17.

Figure 5.2-16 Create a Transceiver



Figure 5.2-17 IP Information of the Transceiver

5.3 OMCB Data Configuration
[Task Purpose]

Configure the SDR physical data according to the planning

[Task Preparations]

1. Know the BTS name, site number and site type of each SDR site.

2. Know the physical transmission type (E1/T1 or Ethernet).

3. Know the interface position and module number corresponding to the SDR
site on the iBSC.

4. Know the IP address of each SDR BTS, and IP addresses of the iBSC
interfaces to the BTSs, and virtual address of the IP Abis interface of the
iBSC.

5. Know the planned IP address of each site and the planned frequency of
each RRU.

5.3.1 Creating A SDR Management NE

 Create a GERANT subnetwork, as shown in Figure 5.3-1.



Figure 5.3-1 Create a GERAN Subnetwork (1)

 Create a BTS Management NE, as shown in Figure 5.3-2.

Figure 5.3-2 Create a BTS Management NE

5.3.2 Applying for Exclusion Right for the Management NE

 Without exclusion right, you cannot create or modify the NE. Figure 5.3-3
shows the method of applying for exclusion right.



Figure 5.3-2 Applying for Exclusion Right

 When you have applied for exclusion right successfully, the tree node on
the network management interface is displayed as a green lock, as shown
in Figure 5.3-3.

Figure 5.3-4 Exclusion Right Applied Successfully

5.3.3 Creating A BTS Configuration Set

 Create a BTS configuration set, as shown in Figure 5.3-4. The following
physical and radio data are configured in the set.



Figure 5.3-5 Create a BTS Configuration Set

5.3.4 Physical Configuration

 Create BTS ground resource management, as shown in Figure 5.3-6.

Figure 5.3-6 Create BTS Ground Resource

 Under the ground management resources, create physical configuration,
including basic rack (BBU), remote rack (RRU), antenna, BBU, and
topology relation between the BBU and the RRU, as shown in Figure 5.3-
7.



Figure 5.3-7 Create SDR Physical Configuration on the OMCB

5.3.5 Transmission Configuration

 In E1/T1 transmission, seven items should be configured at least: E1/T1
Connection Configuration, High Level Data Link Control, Point-to-
Point Protocol Configuration, IP Property Configuration, Coupling
Configuration, and OMC-B Connection, as shown in Figure 5.3-8.



Figure 5.3-8 Transmission Configuration in E1 Transmission

 In FE transmission, five items should be configured at least: Ethernet
Configuration, Qos Bandwidth Configuration, Global Port
Configuration, IP Property Configuration, Coupling Configuration,
and OMC-B Connection, as shown in Figure 5.3-9.

Figure 5.3-9 Transmission Configuration in FE Transmission

 If the planned SDR address and the virtual address of the IP Abis interface
of the iBSC are not in the same segment, Static Route Configuration
must be added to the IP and Route Management, as shown in Figure
5.3-10.



Figure 5.3 -10 Static Route Configuration

5.3.6 Clock Configuration

 In the time source priority configuration, select the input clock and its
priority for the SDR, as shown in Figure 5.3-11.

Figure 5.3 Clock Source Priority Configuration

5.3.7 Optional Configuration

 If dry contacts and other similar are installed, they also must be configured
at the foreground. See Figure 5.3-12.



Figure 5.3-12 Optional Configuration

5.3.8 Radio Configuration

 Creat radio information including RF Central Frequency Point, GSM Sector
Parameter, GSM RU parameter and GSM Carrier Wave Parameter.

Figure 5.3-13 Radio Configuration



5.4 LMT Installation and Data Configuration

5.4.1 SDR Logging in to the SDR with the Debugger

 Connect the network port of the debugger with the ETH1 interface of the
active CC board.

 Start the LMT, and log in to the SDR, as shown in the following figure.

Figure 5.4-20 LMT Login Interface

5.4.2 Configuring the SDR BTS Through the LMT

LMT configuration is basically consistent with the OMCB configuration. Except
basic property configuration, it also falls into physical, transmission, and radio
configurations.

5.4.3 Basic Property Configuration

 Before this configuration, set some basic properties, including Set Basic
Properties, Set Clock Reference Source, BTS Time Properties, as
shown in Figure 5.4-2.



Figure 5.4-21 Set Basic Properties

5.4.4 Physical Configuration

 Configure the basic rack 1, the remote rack (RRU), and the topology
structure, as shown in Figure 5.4-3. Unlink in the OMCB, antennas are
already configured in the RRU. Thus, no antennas are configured here.



Figure 5.4-22 Configure SDR Physical Data Using the LMT

5.4.5 Transmission Configuration

 For E1 access, seven items should be configured: E1/T1 cable, HDLC
parameters, PPP parameters, global port parameters, IP parameters,
SCTP parameters, and OMCB parameters, as shown in Figure 5.4-4.

Figure 5.4-23 Configure SDR Transmission Resource Using the LMT (E1/T1)

 For FE access, only five items should be configured: Ethernet parameters,
global port parameters, IP parameters, SCTP parameters, and OMCB
parameters, as shown in Figure 5.4-5.



Figure 5.4-24 Using the LMT to Configure the Transmission Resources of the SDR (FE)

 If the planned SDR address and the virtual address of the IP Abis interface
of the iBSC virtual address are not in the same network segment, Static
Route Parameters also should be configured, as shown in Figure 5.4-6.



Figure 5.4-25 Configure Static Route When in Different Segments

5.4.6 Radio Configuration

 Configure the RF unit center frequency, GSM sector, GSM RU, and GSM
carrier, as shown in Figure 5.4-7.

Figure 5.4-26 LMT Configures the Radio Data of the SDR



5.5 Data Synchronization Between the Foreground and the
Background
When above OMCR, OMCB, and LMT data are configured correctly, the
versions run normally, and the network transmission are normal, you can
establish a link between the SDR at the foreground and the OMCB at the
background. When the link is establishment, you can synchronize the OMCB
configuration data to the SDR at the foreground, or transconfigure the
configuration data on the SDR at the foreground to the OMCB at the
background.

 Synchronize the OMCB data to the SDR at the foreground, as show in
Figure 5.5-1.

Figure 5.5-1 Synchronize Data from the OMCB to the Foreground

 Transconfigure SDR data to the OMCB. In Figure 5.5-1, select BTS Data
Configuration Wizard. The interface as show in Figure 5.5-2 is displayed.



Figure 5.5-2 Transconfigure Data from the SDR at the Foreground

 Synchronize the OMCR radio data to the foreground, as shown in Figure
5.5-3.

Figure 5.5-3 Synchronize OMCR Data to the Foreground



Appendix

 Abbreviations

 SDR Software Defined Radio

It indicates the radio in which some or all of the physical layer
functions are software defined.

 HR Hardware Radio

It indicates the radio in which the main functions are achieved through
the hardware.

 DDT Delay Diversity Transmission

It indicates that two transmitters in the double-diversity carrier module
send same signals in short delays and form into one virtual transmitter
to enhance the downlink signal. In this way, the coverage increases
more than 20%.

 DPCT Dual Power Combining Transmission

It indicates that the two send units in the double-diversity of the BTS
realizes coherent combining, that is, the two send unit in the module
send same bursts in the same moments and form into a nominal
carrier through the combiner, thus obtaining a unlink transmission gain
greater than 2 dB and increasing the cell coverage. The four-antenna
diversity function is used with DPCT simultaneously to implement the
ultra-distance coverage of BTS.

 IRC Interference Rejection Combining

The IRC diversity of the uplink link can improve the uplink receiving
sensitivity of the receiver and enlarge the uplink coverage of the BTS.

 Support intelligent power-up/power-down In same cases, the
board cannot be monitored or cannot be reset on the hardware, and
the system must be in the power-down or power saving mode. In
these cases, some boards (DTRU) can be powered down through the



board controlled by the system (CMB). For example, the system can
power down partial carrier modules in normal power supply according
to the decrease of the traffic.

 uTCA Micro Telecommunications Computing Architecture.

uTCA is the abbreviation of the Micro TCA that is the short form of the
advanced Telecom computing architecture (ATCA).

As a standard open architecture, the uTCA provides options for
communication system design on various components of different handovers,
ports, protocols, and functions, system architecture, redundancy and high
availability. ATCA is oriented to the application environment with high
capacity and high performance, while uTCA is oriented to the low-cost and
volume-sensitive application environment with low capacity and
performance requirements. uTCA inherits many specifications of ATCA,
including basic interconnection topology and management structure.


Introduction to ZXSDR Products (GSM) (V2009-R1.0

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