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ZXSDR BS8800 GU360 Indoor GSM&UMTS Dual Mode Macro Node B System Background ZTE Software Defined Radio (SDR) BTS family is designed and manufactured by ZTE CORPORATION. It adopts advanced SDR technology, and the hardware architecture is based on ZTE unified MicroTCA platform. The platform includes GSM, UMTS, CDMA2000, and WiMAX, and can smoothly evolve to Enhanced EDGE/LTE. BS8800 GU360 is a dual-mode indoor macro base station. It supports GSM (850 MHz/900 MHz/1800 MHz/1900 MHz) and UMTS (850 MHz/900 MHz/1800 MHz/1900 MHz/2.1 GHz). It can independently function as a GSM macro base station or a UMTS macro base station. It also supports the soft base station on some frequency bands (850 MHz/900 MHz/1800 MHz/1900 MHz). BS8800 GU360 adopts the architecture in which baseband and RF are separated. The baseband unit design adopts MicroTCA platform while the radio unit can select RU60, RU02, and RU40, which guarantees flexible site configuration. RU60: based on the broadband transceiver and multi-carrier power amplifier, supporting GSM and UMTS. RU02: dual-density radio unit, supporting multiple GSM RF technologies and satisfying requirements of small-capacity site configuration. RU40: single-mode multi-carrier RF unit, supporting UMTS.

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Page 1: ZXSDR BS8800

ZXSDR BS8800 GU360Indoor GSM&UMTS Dual Mode Macro Node B

System Background

ZTE Software Defined Radio (SDR) BTS family is designed and manufactured by ZTE

CORPORATION. It adopts advanced SDR technology, and the hardware architecture is based on

ZTE unified MicroTCA platform. The platform includes GSM, UMTS, CDMA2000, and WiMAX,

and can smoothly evolve to Enhanced EDGE/LTE. BS8800 GU360 is a dual-mode indoor macro

base station. It supports GSM (850 MHz/900 MHz/1800 MHz/1900 MHz) and UMTS (850

MHz/900 MHz/1800 MHz/1900 MHz/2.1 GHz). It can independently function as a GSM macro

base station or a UMTS macro

base station. It also supports the soft base station on some frequency bands (850 MHz/900

MHz/1800 MHz/1900 MHz). BS8800 GU360 adopts the architecture in which baseband and RF

are separated. The baseband unit design adopts MicroTCA platform while the radio unit can

select RU60, RU02, and RU40, which guarantees flexible site configuration.

RU60: based on the broadband transceiver and multi-carrier power amplifier,

supporting GSM and UMTS.

RU02: dual-density radio unit, supporting multiple GSM RF technologies and satisfying

requirements of small-capacity site configuration.

RU40: single-mode multi-carrier RF unit, supporting UMTS.

BS8800 GU360 can be applied in heavy-traffic areas, such as big cities, medium-size

cities, commercial districts, and airports. It is also suitable in areas with small coverage,

such as rural area. With appropriate network planning, it can also be applied in various

geographical areas, such as mountainous area and highways

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The GSM/EDGE/UMTS system consists of four parts: base station (BTS/Node B), radio network controller (BSC/RNC), core network (CN), and UE, as shown in figure

Cabinet The BS8800 GU360 cabinet includes the primary cabinet and the secondary cabinet. The primary cabinet supports 36 GSM carriers. When the number of carriers at a site exceeds 36, the capacity can be expanded by adding secondary cabinet, and each secondary cabinet also supports 36 GSM carriers.

System Features Dual mode BTS

BS8800 GU360 supports various wireless access technologies including GSM and UMTS. System architecture

Page 3: ZXSDR BS8800

BS8800 GU360 adopts the architecture in which baseband and RF are separated. The radio unit is located in the local cabinet, while the baseband unit adopts the all-IP hardware platform and IP switching is provided inside BS8800 GU360.

Smooth evolutionBS8800 GU360, with MicroTCA platform and SDR technology, can smoothly evolve to Enhanced EDGE. In hardware, it can evolve to LTE, sharing the hardware platform with the future LTE.

Large capacity and flexible configurationo GSM single mode

BS8800 GU360 adopts two kinds of radio unit: Dual-density radio unit (RU02) and Multi-carrier radio unit (RU60) RU02 satisfies the configuration requirements for small-capacity site. One RU02 supports 2 GSM carriers.RU60 supports large-capacity configuration. One RU60 supports 6 GSM carriers.

o UMTS single mode

BS8800 GU360 adopts two kinds of radio unit: RU60 and RU40In UMTS 900/1800 MHz band, RU60 is used, and one RU60 supports 4 UMTS carriers. In UMTS 2100 MHz band, RU40 is used, and one RU40 supports 4 UMTS carriers. Also, RU60 and RU40 allow mixed deployment in the same cabinet, supporting flexible hetero-frequency networking.

o GSM/UMTS dual modeRU60 is used. One RU60 simultaneously supports 4 GSM carriers + 1 UMTS carrier or 2 GSM carriers + 2 UMTS carriers.

Networking capability

BS8800 GU360 provides Abis/Iub interface E1/T1 and GE optical/ electrical interface, and supports star-networking, chain networking, and ring networking.BS8800 GU360 satisfies GSM/UMTS hybrid networking requirements in different application scenarios.

Clock synchronizationBS8800 GU360 supports many clock synchronization modes:

GPS-based radio interface clock synchronization External BITS synchronization clock input Abis/Iub-interface-E1/T1-synchronized upper-level clock Basic functions

With Um/Uu interface, BS8800 GU360 accomplishes UE access and RF link transmission, including:

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RF signal processing Channel coding and decoding Channel multiplexing and de-multiplexing Measurement and reporting Power control Transmission diversity Receiving diversity Calibration Synchronization

With Abis/Iub interface, BS8800 GU360 connects with BSC/RNC and accomplishes the following functions:

Cell management Reporting BTS measurement information Broadcasting system messages Access control Mobility management Radio resource management RF signal processing Transmission management

With operating and maintenance interface, BS8800 GU360 performs system management, including:

Configuration management Alarm management Status checking and monitoring

Dual modeSupporting GSM/EDGE and UMTS, each mode can work independently. Supporting mixed installation of boards with different frequencies in the same cabinet and mixed installation of boards with the same frequency in the same cabinet. Through relevant baseband board configuration, software version downloading, and background configuration, the GSM network and UMTS network can be upgraded, changed over, or run simultaneously.Supporting GSM Phase I/GSM Phase II/GSM Phase II + standards. Supporting UMTS R99, R4, R5, R6, R7.

Frequency hoppingBS8800 GU360 supports GSM baseband frequency hopping and RF frequency hopping.

Power controlBS8800 GU360 supports downlink carrier power control. In GSM/EDGE mode, it supports static 6-level power control and dynamic 15-level power control.

Discontinuous Transmission (DTX)BS8800 GU360 supports DTX, which reduces the transmitting power and the total signal interference level in the air.

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Modulation modesAccording to modulation commands issued by the base station controller, BS8800 GU360 supports multiple modulation modes including GMSK, 8PSK, QPSK, and 16-QAM. Transmission diversity and receiving diversity

In GSM mode, BS8800 GU360 supports downlink transmission diversity, two-way/four-way

diversity reception. It also supports the four-antenna IRC technology.

IRC switch control

BS8800 GU360 can enable and disable the interference-eliminating function through software.

After the function is disabled, the system can be recovered to the state before the

disabling operation is performed.

IP Abis interface

IP function is supported at Abis interface.

GPS all-network synchronization

The GPS module is embedded in the baseband unit. The GPS clock is taken as the standard clock

source for the entire base station to realize the GSM system all-network synchronization.

Carrier license control

BS8800 GU360 performs license control for multi-carrier-module carrier, which can be

commissioned according to a single carrier.

Electrical antenna

BS8800 GU360 supports electrical antenna and Tower Mounted Amplifier (TMA).

System Capacity

The following lists system carrier capacities:

In GSM single mode, the primary cabinet supports 36 TRXs (a single RU supports 6

carriers, and there are 6 RUs in full configuration). The capacity can be expanded to be

72 TRXs through secondary cabinet.

In UMTS single mode, at most 12 CSs are supported, and the maximum site type

supported is 4C3S or 2C6S.

In GSM/UMTS dual mode, the maximum site type supported is GSM 18TRX + UMTS

4C3S.

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SYSTEM PROTOCOL INTERFACES

BS8800 GU360 CABINET LAYOUT

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INTERFACE DESCRIPTIONS

BS8800 GU360 SYSTEM STRUCTURE

According to the system logic structure, BS8800 GU360 is divided into two parts: Base Band Unit (BBU) Radio Unit (RU)

BBU and RU are connected by optical fiber, transferring baseband IQ data and OAM signaling

Page 8: ZXSDR BS8800

Baseband Layer BBU performs Abis/Iub interface functions, signaling processing, baseband processing, remote and local O&M functions, working status monitoring, and alarm functions.

Below table describes functions of boards and modules in the baseband layer. Board Module Name Functions

CC Main controlboard

Performs main control function.Provides system clock signal.Performs Ethernet switching function.

UBPG/BPC GSM baseband processingboard/UMTS basebandprocessing board

Performs FP processing.Performs physical layer coding/decoding.Performs modulation/demodulation.Performs spreading/despreadingprotocol processing

FS Network switching board Performs IQ switching function.Performs functions of basebandprocessing board and RU interface.

SA On-site alarm board Provides system environment monitoring function, E1/T1 interface, and dry contact

PM Power module Performs functions of BBU power supply input, voltage conversion, and power supply monitoring.

FA Fan module Performs heat dissipation for BBU.Provides functions of monitoring, power supply, and status reporting for the fan.

RF Layer RU performs the following functions: Mutual conversion between air RF signal and digital signal RF signal amplification and transceiving

Board Module Name Functions

RU60 Multi-carrier radio unit Used for GSM/UMTSSupports 6 carriers at most inGSM modeSupports 4 carriers at most inUMTS mode

RU02 Dual-density radio unit Only used for GSMSupports 2 carriers at most

RU40 Multi-carrier radio unit Only used for UMTS 2100 MHz bandSupports 4 carriers at most

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Exercise:

GSM Single Mode Configuration1. BOARD CONFIGURATION OF S6 SITE IN GSM SINGLE MODE 2. BOARD CONFIGURATION OF S12 SITE IN GSM SINGLE MODE 3. BOARD CONFIGURATION OF S6/6/6 SITE IN GSM SINGLE MODE 4. BOARD CONFIGURATION OF S12/12/12 SITE IN GSM SINGLE MODE 5. BOARD CONFIGURATION OF S2 SITE IN GSM SINGLE MODE 6. BOARD CONFIGURATION OF S2/2/2 SITE IN GSM SINGLE MODE 7. BOARD CONFIGURATION OF S4/4/4 SITE IN GSM SINGLE MODE

UMTS Single Mode Configuration8. BOARD CONFIGURATION OF 3C1S SITE IN UMTS SINGLE MODE 9. BOARD CONFIGURATION OF 6C1S SITE IN UMTS SINGLE MODE 10. BOARD CONFIGURATION OF 1C3S SITE IN UMTS SINGLE MODE 11. BOARD CONFIGURATION OF 4C3S SITE IN UMTS SINGLE MODE 12. BOARD CONFIGURATION OF 1C3S SITE IN UMTS SINGLE MODE 13. BOARD CONFIGURATION OF 3C3S SITE IN UMTS SINGLE MODE 14. BOARD CONFIGURATION OF 4C3S SITE IN UMTS SINGLE MODE 15. BOARD CONFIGURATION OF 2C6S SITE IN UMTS SINGLE MODE

GSM/UMTS Dual Mode Configuration

16. BOARD CONFIGURATION IN GSM/UMTS DUAL MODE (GSM:S4+UMTS:S1 OR GSM:S2+UMTS:S2)

17. BOARD CONFIGURATION IN GSM/UMTS DUAL MODE (GSM:S8+UMTS:S2) 18. BOARD CONFIGURATION IN GSM/UMTS DUAL MODE (GSM:S4+UMTS:S4) 19. BOARD CONFIGURATION IN GSM/UMTS DUAL MODE (GSM:S4/4/4+UMTS:S1/1/1) 20. BOARD CONFIGURATION IN GSM/UMTS DUAL MODE (GSM:S2/2/2+UMTS:S2/2/2) 21. BOARD CONFIGURATION IN GSM/UMTS DUAL MODE (GSM:S6/6/6+UMTS:S3/3/3) 22. BOARD CONFIGURATION IN GSM/UMTS DUAL MODE (GSM:S8/8/8+UMTS:S2/2/2)