Introduction to ZXSDR Products (GSM)

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

Address: ZTE Plaza, Keji Road South, Hi-tech Industrial Park, Nanshan District, Shenzhen, P.R. China

Post code: 518057

Technical support website: http://tsm.zte.com.cn

Hotline: +86 755 26770800 800-830-1118

Fax: +86 755 26770801

* * *



Legal Information

All rights reserved. No part of this documentation may be excerpted,

reproduced, translated, annotated or duplicated, in any form or by any means

without the prior written permission of ZTE Corporation.

and are the registered trade marks of ZTE Corporation. The names

and logos of ZTE products are proprietary logos or registered trade marks. The

names of other products and companies mentioned in this manual may be

proprietary to their owners respectively. Without the prior written permission of

ZTE or the owners of third-party trade marks or trade names, this manual does

not grant the reader any permission or right to use any marker appeared in the

manual.

The product described herein conforms to the design requirements of

environment protection and human security. The storage, usage, and discard

of the product shall comply with the manual, related contract, or laws and

regulations of related countries.

The actual product may differ from what is described in this standard due to

frequent update of ZTE products and fast development of technologies. Please

contact the local ZTE office for the latest updating information of the product.

For the latest document information, please visit our website: http://tsm.zte.com.cn


http://tsm.zte.com.cn/


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

1.1 Challenge in the Development of Communication Technology.......................................................1-1

1.2 SDR Concept....................................................................................................................................1-1

2. ZTE SDR Solution.................................................................................................................................2-2

2.1 Why to Select ZXSDR Series BTS...................................................................................................2-2

2.1.1 High-integrity.........................................................................................................................2-3

2.1.2 Flexible Architecture..............................................................................................................2-3

2.1.3 Multiple New Functions.........................................................................................................2-4

2.1.4 Lower Cost.............................................................................................................................2-4

2.2 Main Differences Between ZXSDR and Traditional 2G BTS..........................................................2-4

2.2.1 uTCA-based............................................................................................................................2-4

2.2.2 BBU+RRU Architecture.........................................................................................................2-5

2.2.3 Introduction to OMCB............................................................................................................2-6

2.2.4 IP Abis Interface.....................................................................................................................2-7

2.2.5 Multi-carrier Combination......................................................................................................2-7

2.3 ZXSDR BTSs...................................................................................................................................2-8

2.3.1 ZXSDR B8200.......................................................................................................................2-8

2.3.2 ZXSDR R8860 Hardware Structure.....................................................................................2-12

2.3.3 ZXSDR BS8800 GU360 Hardware Structure......................................................................2-14

2.3.4 ZXSDR BS8900 GU360 Hardware Structure......................................................................2-16

2.4 Conditions for the Subscription of SDR.........................................................................................2-18

3. ZTE SDR Networking.........................................................................................................................3-19

3.1 From the Angle of Abis Interface...................................................................................................3-19

3.2 From the Angle of Network Topology............................................................................................3-20

3.2.1 Networking of BBU and RNC/BSC.....................................................................................3-20

3.2.2 Networking of BBU and RRU..............................................................................................3-21

3.3 From the Angle of O&M................................................................................................................3-23



3.3.1 Networking Sample..............................................................................................................3-23

4. ZXSDR Series BTS Hardware Installation........................................................................................4-25

4.1.1 B8200 Hardware Installation................................................................................................4-25

4.1.2 B8860 Hardware Installation................................................................................................4-29

4.1.3 B8200+R8860 Installation and Distribution Diagram..........................................................4-32

5. ZTE SDR Commissioning...................................................................................................................5-33

5.1 SDR BTS Commissioning Flow.....................................................................................................5-33

5.2 OMCR Data Configuration.............................................................................................................5-35

5.2.1 BSC Global Resource Configuration....................................................................................5-36

5.2.2 Board Configuration of Abis and OMCB Interfaces.............................................................5-37

5.2.3 IP-Related Configuration......................................................................................................5-39

5.2.4 Configuring a B8200 Site Under the OMCR........................................................................5-43

5.3 OMCB Data Configuration.............................................................................................................5-46

5.3.1 Creating A SDR Management NE........................................................................................5-46

5.3.2 Applying for Exclusion Right for the Management NE........................................................5-47

5.3.3 Creating A BTS Configuration Set.......................................................................................5-48

5.3.4 Physical Configuration.........................................................................................................5-49

5.3.5 Transmission Configuration..................................................................................................5-50

5.3.6 Clock Configuration.............................................................................................................5-52

5.3.7 Optional Configuration.........................................................................................................5-52

5.3.8 Radio Configuration.............................................................................................................5-53

5.4 LMT Installation and Data Configuration......................................................................................5-54

5.4.1 SDR Logging in to the SDR with the Debugger...................................................................5-54

5.4.2 Configuring the SDR BTS Through the LMT......................................................................5-54

5.4.3 Basic Property Configuration...............................................................................................5-54

5.4.4 Physical Configuration.........................................................................................................5-55

5.4.5 Transmission Configuration..................................................................................................5-56

5.4.6 Radio Configuration.............................................................................................................5-59

5.5 Data Synchronization Between the Foreground and the Background............................................5-60

Appendix....................................................................................................................................................5-62



一. What is SDR

一.1 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.

一.2 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



二. 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?

二.1 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 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.


http://www.sina.com/


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.

二.1.1 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+

二.1.2 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

二.1.3 Multiple New Functions

Baseband frequency hopping

Transmit/receive diversity

DDT/DPCT

Multi-carrier combination

二.1.4 Lower Cost

Reduced unit cost

Reduced typical networking cost

Saved ABIS bandwidth

Reduced operating cost

Reduced maintenance cost

二.2 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.

二.2.1 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.

二.2.2 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.

二.2.3 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.

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.



二.2.4 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.

二.2.5 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

二.3 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.

二.3.1 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

No.

Local Cable

Connection

Position

Remote

Cable

Connection

Position

Cable Name Cable Usage

Cable

Medium/Typ

e

1

Optical

interface of the

FS board on

the B8200

CPRI

interface on

the RRU

CPRI

interface

cable

Connect the BBU

and the RRU, and

transmit IQ signals

single

mode

optical fiber

2

Power

interface of the

PM board on

the B8200

DC -48 VB8200

power cable

B8200 power supply

cable

10 square

millimeter

power

supply cable

3MON on the

PM board on



No.

Local Cable

Connection

Position

Remote

Cable

Connection

Position

Cable Name Cable Usage

Cable

Medium/Typ

e

the B8200

4

DB44 lug of

the SA panel

line

E1 stub

from the

optical

terminal on

the DDF rackSA panel

line

Connect E1 signal

cable

DB9 lug of

the SA panel

line

External

debugging

equipment

Connect

RS232/RS485 serial

port cable

DB25 lug of

the SA panel

line

Position to

be monitored

Connect dry contact

signal cable

5

EXT

interface of the

CC board on

the B8200

EXT external

communication port

(485 or PP1S+/2M+

interface) which is

connected to the

external receiver

6

REF port of

the CC board

on the B8200

GPS

lighting

protector

GPS

antenna

feeder cable

Receive the GPS

signals

7,

8

ETH0

interface

(electrical

interface) of

the CC board

on the B8200

IP network

connected to

the RNC

GE

electrical

interface

cable of the

Iub interface

Connect the Ethernet

ports between the BBU

and RNC. This port is

categorized into two

types: Ethernet optical

interface and electrical

interface

(10M/100M/1000M

adaptive)

RJ45 UTP

CAT-5/CAT-

6

9

ETH1

interface

(electrical

interface) of

the CC board

on the B8200

IP network

connected to

the RNC

GE

electrical

interface

cable of the

Iub interface

Used for the

cascade, debugging, or

local maintenance of

the BBC, and the

Ethernet electrical

interface(10M/100M/10

00M adaptive)

RJ45 UTP

CAT-5/CAT-

6



二.3.2 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

1 LC1

Interface between

BBU and RRU/RRU

cascading interface

LC optical interface (IEC 874)

2 LC2

Interface between

BBU and RRU/RRU

cascading interface

LC optical interface (IEC 874)

3 AISGAISG device

interface

8-core aerial socket (IEC 60130-9-

ED)

4 Mon

External device

interface (monitoring,

LMT, etc.)

37-core aerial socket

5 DC IN Power interface

DC interface: connector

XCG18T4K1P1-01+XC18FJJP1-

10.5

Cable cross-sectional area: 1.5mm²

6 RXReceive diversity RF

cable interface50Ω DIN connector

7 RX/TX

Receive/Transmit

main set RF cable

interface

50Ω DIN connector

8 RXoutFrequency

expansion interfaceN-KY (MIL-C-39012 or IEC 169-16)

9 RXinFrequency

expansion interfaceN-KY (MIL-C-39012 or IEC 169-16)

10 GNDEquipment

groundingCable cross-sectional area: 35mm²

二.3.3 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

二.3.4 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)

二.4 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.



三. 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.

三.1 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.

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.



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

三.2 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.

三.2.1 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

三.2.2 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

三.3 From the Angle of O&M

三.3.1 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.

Figure 3.3-19 OMCB O&M System Network Topology



四. 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.

四.1.1 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

四.1.2 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



四.1.3 B8200+R8860 Installation and Distribution Diagram

Figure 3.3-10 B8200+R8860 Installation and Distribution Diagram



五. ZTE SDR Commissioning

五.1 SDR BTS Commissioning Flow

The following figure shows the SDR BTS commissioning flow:



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.

五.2 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.

五.2.1 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



五.2.2 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.

五.2.3 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

五.2.4 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

五.3 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.

五.3.1 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

五.3.2 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

五.3.3 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

五.3.4 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

五.3.5 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

五.3.6 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

五.3.7 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

五.3.8 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



五.4 LMT Installation and Data Configuration

五.4.1 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

五.4.2 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.

五.4.3 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

五.4.4 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

五.4.5 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

五.4.6 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



五.5 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)

Documents

Transcript of Introduction to ZXSDR Products (GSM)