M_der_zxmw Nr8120a Nr8120d (r4.2a) Product Description_v1.01_20160330

ZXMW NR8120A & NR8120D Product Description Digital Microwave Transmission System R4.2A

ZXMW NR8120A & NR8120D Product Description

ZXMW NR8120A & NR8120D Product Description Version

Date

V1.00

2015/12/20

V1.01

2016/03/30

Author

Reviewer

Xu Youling

Geng Jichuang

Zhang Feiteng

Guo Jinghui

Geng Jichuang

Guo Jinghui

Notes NR8120 enhanced hardware version. Radio capacity: The maximum number of E1s in radio link is reduced to 48 from 75.

© 2016 ZTE Corporation. All rights reserved. ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE. Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.

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ZXMW NR8120A & NR8120D Product Description

TABLE OF CONTENTS

2

1 1.1 1.2 1.3 1.3.1 1.3.2 1.3.3 1.4

Overview ............................................................................................................ 8 NR8000 Product Introduction ............................................................................... 8 Cost Efficient and Future Oriented Product ........................................................ 10 System Introduction ........................................................................................... 10 IDU .................................................................................................................... 10 ODU................................................................................................................... 11 Flexible ODU Mounting Methods ....................................................................... 12 Network Application ........................................................................................... 14

2 2.1 2.2 2.3 2.4 2.5 2.6 2.6.1 2.6.2 2.7 2.8 2.9 2.9.1 2.10 2.11 2.12 2.13 2.13.1 2.13.2 2.14 2.14.1 2.14.2 2.14.3 2.14.4 2.14.5 2.14.6 2.15 2.16 2.17 2.18

Functions and Features .................................................................................. 14 Unified Platform for Hybrid and Packet Microwave ............................................. 14 Circuit Emulation Service over Ethernet (CESoETH) ......................................... 15 High Performance Switching Capacity ............................................................... 17 Intelligent Cooling System.................................................................................. 17 Automatic Transmit Power Control (ATPC) ........................................................ 18 Adaptive Coding & Modulation (ACM) ................................................................ 18 Enhanced ACM .................................................................................................. 19 ACM with QoS ................................................................................................... 20 Flexible Radio Configuration .............................................................................. 20 Carrier Grade Ethernet Functionality .................................................................. 21 Load Balance ..................................................................................................... 23 LAG/Enhanced LAG for Ethernet Line Protection .............................................. 24 Double Spectrum Efficiency: XPIC (CCDP)........................................................ 25 Header Compression ......................................................................................... 25 Ethernet QoS ..................................................................................................... 26 Ethernet OAM .................................................................................................... 27 Ethernet Link OAM............................................................................................. 28 Ethernet Service OAM ....................................................................................... 28 Microwave Security ............................................................................................ 30 Radio Link Security Identification (Link Security ID) ........................................... 30 Access Control List (ACL) .................................................................................. 30 Broadcast Storm Control .................................................................................... 30 LMT Authority .................................................................................................... 31 Radio Link Encryption ........................................................................................ 31 Other Security Features ..................................................................................... 31 High Accuracy Clock Supply and Synchronization ............................................. 32 Protection and Resilience .................................................................................. 32 Frequency Auto-scanning .................................................................................. 33 Intelligent License Control .................................................................................. 34

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ZXMW NR8120A & NR8120D Product Description

2.19 2.20 2.20.1 2.20.2

Link Capacity Pass-Through (LCPT) .................................................................. 35 Management and Maintenance .......................................................................... 36 Full Scale Management Solution........................................................................ 36 Wi-Fi Access for Local Management .................................................................. 37

3 3.1 3.2 3.3 3.3.1 3.3.2 3.3.3 3.3.4 3.3.5

Hardware Description ..................................................................................... 38 IDU Structure ..................................................................................................... 38 ODU Structure ................................................................................................... 40 Boards and Interface.......................................................................................... 41 RCMUC ............................................................................................................. 41 RCMUD ............................................................................................................. 43 RTEA (native 16×E1) ......................................................................................... 45 RTEB (CES/Native 16×E1) ................................................................................ 46 RFAE ................................................................................................................. 46

4 4.1 4.2

Element Management System (EMS) ............................................................. 48 Unified EMS, Powerful Management.................................................................. 48 Web-based LMT, Easy Maintenance ................................................................. 49

5 5.1 5.1.1 5.1.2 5.1.3 5.1.4 5.2 5.2.1 5.2.2 5.2.3

Configuration and Application ....................................................................... 51 NR8120A&D Typical Configurations .................................................................. 51 NR8120A 1+0 Configuration .............................................................................. 51 NR8120D 1+1 HSB Configuration ...................................................................... 52 NR8120D 1+1 SD Configuration ........................................................................ 53 NR8120D 2+0 XPIC Configuration ..................................................................... 54 Application Scenarios ........................................................................................ 55 Tree Network ..................................................................................................... 56 Ring Network ..................................................................................................... 57 All-Packet Switching Application ........................................................................ 59

6 6.1 6.1.1 6.1.2 6.1.3 6.1.4 6.1.5 6.2 6.2.1 6.2.2 6.3 6.3.1

Performance and Parameters ......................................................................... 60 System Integrity ................................................................................................. 60 Mechanical Characteristics ................................................................................ 60 Operation Parameters ........................................................................................ 60 Standards Compliance ....................................................................................... 62 Fault Tolerance MTBF/MTTR............................................................................. 63 General Safety Requirements ............................................................................ 63 Physical Interfaces Performance........................................................................ 64 Service Interface ................................................................................................ 64 Management and Auxiliary Interface .................................................................. 65 Radio Performance ............................................................................................ 66 Transmitter Characteristics ................................................................................ 66

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ZXMW NR8120A & NR8120D Product Description

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6.3.2 6.4 6.4.1 6.4.2 6.5

Receiver Characteristics .................................................................................... 73 System Capability .............................................................................................. 77 System Transmission Capacity .......................................................................... 77 Channel Spacing................................................................................................ 80 Clock and Synchronization ................................................................................. 80

7

Abbreviations .................................................................................................. 81

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ZXMW NR8120A & NR8120D Product Description

FIGURES Figure 1-1 NR8000 system general chart............................................................................ 9 Figure 1-2 NR8120A IDU appearance ...............................................................................10 Figure 1-3 NR8120D IDU appearance ...............................................................................11 Figure 1-4 SRU appearance and interfaces .......................................................................11 Figure 1-5 HRU appearance and interfaces .......................................................................12 Figure 1-6 Direct mounting.................................................................................................13 Figure 1-7 Remote mounting .............................................................................................13 Figure 1-8 NR8000 series products typical application .......................................................14 Figure 2-1 Unified switching platform .................................................................................15 Figure 2-2 CESoETH application .......................................................................................16 Figure 2-3 Intelligent cooling system ..................................................................................18 Figure 2-4 ACM working scheme .......................................................................................19 Figure 2-5 Ethernet line protection .....................................................................................25 Figure 2-6 XPIC description ...............................................................................................25 Figure 2-7 E2E and hierarchical Ethernet OAM .................................................................27 Figure 2-8 Intelligent license control schematic ..................................................................34 Figure 2-9 LCPT working scheme ......................................................................................36 Figure 2-10 USB Wi-Fi module ..........................................................................................38 Figure 3-1 Hardware layout................................................................................................38 Figure 3-2 IDU block diagram ............................................................................................40 Figure 3-3 ODU block diagram ..........................................................................................41 Figure 3-4 RCMUC board front panel ................................................................................41 Figure 3-5 RCMUD board front panel ................................................................................43 Figure 3-6 RTEA card front panel ......................................................................................45 Figure 3-7 RTEB card front panel ......................................................................................46 Figure 3-8 RFAE board ......................................................................................................46 Figure 4-1 Network management solution..........................................................................48 Figure 5-1 1+0 configuration diagram ................................................................................52

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ZXMW NR8120A & NR8120D Product Description

Figure 5-2 NR8120D 1+1 HSB configuration diagram ........................................................53 Figure 5-3 NR8120D 1+1 SD configuration diagram ..........................................................54 Figure 5-4 NR8120D 2+0 XPIC configuration diagram .......................................................55 Figure 5-5 Tree network solution (hybrid)...........................................................................56 Figure 5-6 Single ring network solution ..............................................................................57 Figure 5-7 Multiple ring network solution ............................................................................58 Figure 5-8 All-Packet switching network scenario ..............................................................59 Figure 6-1 Relation between RSL and output voltage @ RSSI interface ............................77

TABLES Table 2-1 Switching capacity .............................................................................................17 Table 2-2 Radio configuration list .......................................................................................20 Table 2-3 Carrier grade Ethernet features..........................................................................21 Table 2-4 QoS features......................................................................................................26 Table 2-5 Ethernet service OAM ........................................................................................29 Table 2-6 Protection scheme .............................................................................................33 Table 2-7 Network management features ..........................................................................36 Table 3-1 Flexible configuration .........................................................................................39 Table 3-2 RCMUC interface description .............................................................................41 Table 3-3 RCMUD interface description .............................................................................43 Table 3-4 RTEA interface description ................................................................................45 Table 3-5 RTEB interface description ................................................................................46 Table 5-1 NR8120A&D typical configurations ....................................................................51 Table 5-2 1+0 configuration requirements per site .............................................................52 Table 5-3 NR8120D 1+1 HSB configuration requirements per site ....................................53 Table 5-4 NR8120D 1+1 SD configuration requirements per site .......................................54 Table 5-5 NR8120D 2+0 XPIC configuration requirements per site ...................................55

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ZXMW NR8120A & NR8120D Product Description

Table 6-1 Dimension and weight ........................................................................................60 Table 6-2 Power supply .....................................................................................................60 Table 6-3 Temperature and humidity .................................................................................60 Table 6-4 Module power consumption ...............................................................................61 Table 6-5 Power consumption (reference value) ................................................................62 Table 6-6 Complied standards ...........................................................................................62 Table 6-7 Predicted reliability .............................................................................................63 Table 6-8 Service interface characteristics .........................................................................64 Table 6-9 Management and auxiliary interface characteristics ...........................................65 Table 6-10 Frequency step size and stability .....................................................................66 Table 6-11 Tx/Rx spacing (SRU) .......................................................................................66 Table 6-12 Tx/Rx spacing (HRU) .......................................................................................68 Table 6-13 IF interface standard ........................................................................................68 Table 6-14 Transmit power & ATPC range - Part 1: SRU (6 GHz ~15 GHz) ......................69 Table 6-15 Transmit power & ATPC range - Part 2: SRU (18 GHz ~42 GHz) ....................70 Table 6-16 Transmit power & ATPC range: HRU ...............................................................71 Table 6-17 RSL threshold @ BER=10-6: SRU ...................................................................73 Table 6-18 RSL threshold @ BER=10-6: HRU ....................................................................75 Table 6-19 Typical system transmission capacity ..............................................................78 Table 6-20 Synchronization features..................................................................................80

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ZXMW NR8120A & NR8120D Product Description

1

Overview ZTE NR8000 digital microwave transmission system is introduced in this document. The access equipment, NR8120A and NR8120D, are described in detail. NR8120A is mainly used for 1+0 configuration and NR8120D is widely used for 2+0/1+1 configuration. Both NR8120A and NR8120D handle hybrid transmission for native TDM & Ethernet; with same platform, which also can handle Ethernet packet transmission that means it is perfect for migration from hybrid to all packets. Furthermore, NR8120A/NR8120D (NR8120A/D) employs a range of techniques to offer the high throughput, Ethernet QoS and E2E OAM to serve as you need. (Note: IP MPLS/MPLS-TP is hardware prepared in this version; software will be release in future.)

1.1

NR8000 Product Introduction ZTE’s radio system NR8000 is a packet-based solution to offer carrier grade Ethernet transmission where the packet based traffic is predominant, giving consideration to support the still present TDM traffic. NR8000 represents the capability to allow smooth migration from the hybrid platform to the packet platform in the Mobile Backhauling networks. 

NR8000 portfolio has released 7 models - NR8120, NR8120A, NR8120D, NR8150, NR8250, NR8950 and NR8000TR:



NR8120A/NR8120D is the enhanced hardware version of NR8120. Comparing with NR8120, some features are new added: HQoS, XPIC, 512 to 2048QAM, hardware architecture prepared for 4096QAM/MPLS/STM-1. NR8120A/D also provides much more traffic interfaces than NR8120. NR8120A provides 1 radio direction while NR8120D provides 2 radio directions.



NR8150 is a 1U height box which can support maximum 3 radio directions, which is usually used at terminal, repeater or hub site. When NR8150 IDU combining with NR8950, which can provide max. 12 radio directions and support the modulation range from QPSK to 2048 QAM.

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ZXMW NR8120A & NR8120D Product Description



NR8250 is a 2U height box that supports maximum 6 radio directions or 7 traffic cards to provide nodal solution. When NR8250 IDU combining with NR8950, which can provide max. 20 radio directions and support the modulation range from QPSK to 2048 QAM.



NR8950 is all outdoor microwave radio to provide all-packet transmission solution for mobile backhaul and private network.



NR8000TR consists of three basic units, IDU, ODU and OCU (Outdoor Coupling Unit). It supports multiple configurations, such as 6+0, 7+1, 8+0 XPIC to fulfill more scenarios, trunk, backbone transmission and so on.



NR8120, NR8120A, NR8120D, NR8150 and NR8250 share the universal outdoor parts, including ODU, waveguide and antenna. Furthermore, NR8250 and NR8150 share some of the traffic interface boards and core control units.

Figure 1-1

NR8000 system general chart

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ZXMW NR8120A & NR8120D Product Description

1.2

Cost Efficient and Future Oriented Product NR8120A/D, the 1U height equipment, with 1 extension slot besides 1 main board, which offers maximum two radio directions, six Gigabit Ethernet (one of the GbE optical interfaces is GbE/10GbE combo), two STM-1 (in roadmap) and sixteen E1 interfaces. NR8120A/D provides a cost efficient high capacity access microwave transmission solution with unified hybrid & packet platform, which can transmit single or mixed native TDM, emulated TDM (CESoETH) and native Ethernet service at the same time. Therefore, one NR8120A/D IDU can be used as both hybrid radio for TDM&IP network and packet radio for all-IP network with suitable service boards and software configuration. It’s perfect for a hybrid to all-packet migration.

1.3

System Introduction The NR8120A/D microwave system includes indoor unit (IDU) and outdoor unit (ODU). The ODU is a waterproof unit and can be mounted on antenna in direct or remote way.

1.3.1

IDU

Indoor unit (IDU) provides core control, baseband processing, switching/cross connection and service access function. As an entire system, the indoor unit is connected with a radio unit (ODU) via an Intermediate Frequency (IF) cable. Figure 1-2

10

NR8120A IDU appearance

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ZXMW NR8120A & NR8120D Product Description

Figure 1-3

1.3.2

NR8120D IDU appearance

ODU ODU is the outdoor unit of the NR8000 series, it delivers power amplification and radio frequency (RF) conversion functions There are two types of ODU, SRU and HRU: 

SRU: Normal transmit power ODU, operates in the frequency range of 6-42 GHz (6/7/8/10/11/13/15/18/23/26/28/32/38/42 GHz), support QPSK to 2048 QAM



[Note]

.

HRU: High transmit power ODU, operates in 6/7/8/11 GHz, support QPSK to 1024 QAM.

There are three important interfaces on the ODU: 

RF in/out interface (waveguide type) for connecting to antenna



IF in/out interface (N type) for connecting to modem board



RSSI (Received Signal Strength Indication) interface (BNC type) for RF receiver signal monitoring

Figure 1-4

SRU appearance and interfaces

RF in/out

RSSI

IF in/out

Notes: SRU for QPSK -1024QAM ODU and QPSK-2048QAM ODU are different.

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ZXMW NR8120A & NR8120D Product Description

Figure 1-5

HRU appearance and interfaces

RF in/out

RSSI

1.3.3

IF in/out

Flexible ODU Mounting Methods The ODU has two mounting methods: direct mounting and remote mounting. All the frequency sub-bands support these two mounting methods. Mounting suggestions are described as following: 

Direct mounting is suggested for single-polarized antenna: 

For 1+0 configuration, the ODU is directly connected on antenna.



For 1+1 configuration, a combiner is used to connect the 2 ODUs together and then connected on the antenna.



For 2+0 configuration, if the 2 ODUs’ frequencies are covered by the same combiner, they might adopt direct mounting; otherwise, they should adopt remote mounting.



Remote mounting is usually used for dual-polarized antenna or big-size antenna. In this situation, waveguides are used to connect ODUs to antenna.

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ZXMW NR8120A & NR8120D Product Description

Figure 1-6

Direct mounting

1+1/2+0 configuration

1+0 configuration

Combiner Single-polarized Antenna

Single-polarized Antenna

ODUs

ODU 2+0 XPIC configuration OMT Circle-polarized Antenna

ODUs

Figure 1-7

Remote mounting 1+0 configuration

Single-polarized Antenna

1+1/2+0 configuration

waveguide

Single-polarized Antenna

waveguide

ODUs

ODU

Combiner

2+0 XPIC configuration

Dual-polarized Antenna

ODUs

Waveguide

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ZXMW NR8120A & NR8120D Product Description

1.4

Network Application NR8120/NR8120A/NR8120D is widely applied at terminal access and repeater station.NR8120 is proposed for low-to-medium capacity access and repeater sites, NR8120A is mainly used at medium-high capacity access site and NR8120D fit for high capacity access and repeater scenario. ZTE can provide a cost efficient and flexible transmission solution for our customer with NR8000 portfolio. Figure 1-8

NR8000 series products typical application Microwave Backhaul

FE

E1

GE eNodeB

NR8950

STM-1

E1 FE

FE

NodeB

BSC

RNC

GE E1 BTS

2

NR8120/ NR8120A

NR8120D/ NR8150

NR8250/ NR8000 TR

aGW

Functions and Features The main functions and features of NR8120A/D are described in this chapter. Functions of NR8120 are inherited by NR8120A/D and some of them are improved, such as HQoS, enhanced LAG and higher level modulation.

2.1

Unified Platform for Hybrid and Packet Microwave One NR8120A/D unit can be used as hybrid and packet radio (enhanced ETH or MPLS), which can transmit pure or mixed native TDM, emulated TDM, native Ethernet and MPLS service at the same time. With the MPLS based hardware & software, NR8120A/D will process IP MPLS or MPLS-TP service. Recently, both hardware & software are released for enhanced ETH; MPLS is hardware ready. In this version, NR8120A/D can transmit native TDM, emulated TDM and native Ethernet service over the same radio link.

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ZXMW NR8120A & NR8120D Product Description

It is always possible to migrate from the hybrid radio to the packet radio by applying the proper software, hardware and upgrading the license accordingly. Both hybrid and packet radio can be supported by the same unit. Figure 2-1

Unified switching platform Radio Link Dynamic Allocation

Native ETH CES E1

Native TDM

CES

ETH Switch Modem

TDM DXC

Ethernet (native)

Ethernet (CES E1 ) TDM

The advantages of unified switching platform include:

2.2



Smooth migration from TDM to packet, saving CAPEX



Flexible network for different requirements, easy deployment

Circuit Emulation Service over Ethernet (CESoETH) CESoETH (Circuit Emulation Service over Ethernet), is a kind of circuit emulation technique to carry TDM service over packet switching network (PSN). It is defined by MEF3 & MEF8 for implementing interoperable CES equipment that reliably transport TDM circuits across Metro Ethernet Networks while meeting the required performance of circuit emulated TDM services as defined in ITU-T and ANSI TDM standards. Some standards adopt a kind of similar technique - PWE (Pseudo Wire Emulation) to achieve TDM over PSN. From the perspective of the target, CES and PWE are the same. As shown in Figure 2-2, CES processing unit emulate the TDM circuit at local end and re-creating the TDM circuit at far end.

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ZXMW NR8120A & NR8120D Product Description

Figure 2-2

CESoETH application NR8120 (A/D)

TDM Equipment

CES IWF E1

NR8120 (A/D)/NR8250

Ethernet Ethernet switching

CES IWF

Ethernet Ethernet switching

Carrier Ethernet NNI

TDM Equipment/Network

E1/STM-1

NNI E2E CES E2E EVC Bearing channel （QinQ Link）

CES: Circuit Emulation Service IWF: Inter-Working Function

NR8120A/D allows the access equipment to smoothly evolve in line with the new technology and related protocols (TDM/Ethernet) without site swapping, which keeps the value of the contributed investments. NR8120A/D supports Structure-Agnostic Emulation (be equal to SAToP (RFC4553)) and Structure-Aware Emulation (be equal to CESoPSN (RFC5086)) for G.704 defined E1 service, totally 16 circuit emulation services are supported by one IDU recently: 

Structure-Aware Emulation (structured CES) Structured CES strips off the TDM overhead and just passes the payloads. It allows for more efficient use of MEN bandwidth, fewer circuits, and better network aggregation. Furthermore, structured CES realizes N*64kbit/s timeslot compression for E1 traffic. This implementation agreement defines the structure-aware emulation of the E1 services using “structure-locked”，as described in [Y.1413]:





N×64kbit/s “basic service”



N×64kbit/s service with Channel Associated Signaling (CAS)

Structure-Agnostic Emulation (Unstructured CES) Compared with structured CES, unstructured CES passes all traffic received. It's simpler in TDM overhead, including signaling, timing and fault detection (Alarms) which are preserved and passed through end to end. This implementation agreement defines the structure-agnostic emulation of G.704 defined E1. The payload format is described in [Y.1413].

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ZXMW NR8120A & NR8120D Product Description

2.3

High Performance Switching Capacity NR8120A/D supports L2 switching and TDM circuit emulation functions. The processing capacity of NR8120A/D is shown in Table 2-1 and the available service switching capacity depends on the hardware and software configuration.

Table 2-1

Switching capacity

Function Name Ethernet switching

TDM Cross-connect

Capacity 52 Gbit/s

Full duplex

8000×8000 E1s

VC-12 level

128×128 STM-1s (Note: STM-1 is hardware architecture prepared)

Service Circuit Emulation Capacity (Line side)

2.4

Comments

16 circuit emulation service

VC-4 level E1 service

Intelligent Cooling System An intelligent fan unit is adopted by NR8120A/D to reduce the OPEX and noise. The running speed of fan is automatically adjusted according to the equipment’s temperature, which could reduce the power consumption in real time. The lower temperature the equipment is the less power it cost. And meanwhile, the noise caused by the running fan is reduced obviously. The relationship between board temperature and fan power consumption is shown in Figure 2-3.

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ZXMW NR8120A & NR8120D Product Description

Figure 2-3

Intelligent cooling system

The benefits of intelligent cooling system include:

2.5



Lower power consumption in low temperature condition.



Lower noise, comfortable working environment



Low running speed tendency, longer service life

Automatic Transmit Power Control (ATPC) ATPC is used to lower the RF transmit power when environmental conditions are good in order to reduce wireless interference. Under fading conditions, the transmit power is automatically increased to compensate for far end signal loss and to guarantee the link performance. The 40 dB/s (whole system) and 90 dB/s (ODU) reaction speeds can counteract the wireless link fading.

2.6

Adaptive Coding & Modulation (ACM) The NR8120A/D supports both fixed modulation and Adaptive Coding and Modulation (ACM) mode in all frequencies and Channel Spacing (CS).

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ZXMW NR8120A & NR8120D Product Description

In fixed modulation condition, the radio working status and capacity will not change unless manual configuration. Once the signal quality is degrading lower than receiver threshold, the link will break down and all the services are affected. ACM enables the radio capacity to change according to the link quality, which is a perfect way to supply additional best effort traffic under normal weather conditions. When extreme weather conditions, such as a storm, affect the transmission and receipt of data and voice over the wireless network, an ACM-enabled radio system automatically changes modulation according to MSE (Mean Square Error, that indicates the signal quality), which allows the high priority data (e.g. real time data) to continue to run uninterrupted. With ZTE’s solution, no bit errors are generated during the modulation change; it is designed for Carrier Grade networks. Figure 2-4

ACM working scheme

2048QAM 1024QAM

Low Priority Payload

512QAM 256QAM 128QAM 64QAM 32QAM 16QAM

16QAM 32QAM QPSK

High Priority Payload

2.6.1

Enhanced ACM When planning ACM-based radio links, enhanced ACM allows the radio maintains the highest level modulation with the lowest transmit power (Tx power ). Once fading accrued, NR8120A/D will increase the Tx power quickly in order to keep the high modulation. Once the Tx power achieves the maximal value of the current modulation, the modulation will degrade to lower level, meanwhile the allowed maximum transmit power will be increased to the maximal Tx power of current low modulation (the lower modulation is the higher max. Tx power it has). When fading disappeared, NR8120 will regain the highest modulation firstly and then decrease the TX power if the signal quality can meet the requirement of the highest modulation.

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ZXMW NR8120A & NR8120D Product Description

2.6.2

ACM with QoS Once ACM mechanism is activated, the QoS mechanism will schedule the services according to the priority policies. For further information about Ethernet QoS functionality, please refer to chapter 2.12 Ethernet QoS. The advantages of ZTE’s ACM include: 

Maximized spectrum usage



Hitless and errorless modulation/coding changes based on signal quality. Carried grade modulation changing rate is 10ms per level



Adaptive maximum Tx power per modulation for maximal system gain per working point



An integrated QoS mechanism that enables intelligent congestion management to ensure that high priority traffic is not affected during link fading: 

Native E1 has higher priority than Ethernet traffic. E1 channels can be assigned with different priorities to enable differentiated E1 dropping during severe link degradation



The priorities of emulated E1s are defined by the Ethernet priorities of the emulated E1.

2.7

Flexible Radio Configuration Table 2-2

Radio configuration list Item

Configurations

1+0

2

2+0 east-to-west

1

Protection

1+1 HSB/SD/FD

1

NR8120A

Non-protection

1+0 Non-protection

1

NR8120D

Non-protection

1+0 Non-protection

2

NR8120

20

Max. Number of

Configuration Type

Non-protection

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ZXMW NR8120A & NR8120D Product Description

Item



Max. Number of

Configuration Type

Configurations

Protection

1+1 HSB/SD/FD

1

XPIC

2+0 XPIC

1

NR8120A is mainly used for 1+0 configuration and NR8120D is widely used for 2+0/2+0 XPIC/1+1 HSB/SD/FD configuration.



2+0, 2+0 XPIC or 1+1 HSB/FD/SD can be also realized by cascading two NR8120A IDUs together (Two IDUs Cascading will be released in future).



2+2 XPIC HSD/SD/FD or 4+0 XPIC can be realized by cascading two NR8120D IDUs together (Two IDUs Cascading will be released in future).

2.8

Carrier Grade Ethernet Functionality NR8120A/D’s carrier Ethernet services are MEF referenced design, which provides the following Ethernet features

Table 2-3

Carrier grade Ethernet features

Item

Standardized Services

Feature

Description

E-LINE, E-LAN &

Comply with MEF6.1 & MEF10.2;

E-TREE

MEF 9 & MEF14 or CE2.0 certificated.

CESoETH

Bridge

Comply with MEF 3, MEF8, ITU-T Y.1413, SAToP and CESoPSN. IEEE 802.1p/ 802.1q/802.1ad; Support peer/tunnel/discard L2 control protocol.

Maximum

MTU: 1522 bytes;

Transmit Unit

Jumbo frame: up to 9600 bytes. Max number of supported MAC address: 32K;

Scalability

MAC Address

MAC address learning enable/disable;

Learning Capacity

MAC address learning mode: IVL/SVL; MAC address aging time: 1 to 1,048,575 s.

VLAN

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Support IEEE 802.1p/ 802.1q/802.1ad;

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ZXMW NR8120A & NR8120D Product Description

Item

Feature

Description Integrated non-blocking switch; 4K×4K VLAN IDs by QinQ; Selective QinQ (Add, delete and rewrite VLAN tags based on port /protocol/MAC); Support copy/remap inner VLAN tag priority to outer VLAN. Supports port-based mirror function:

the

messages from input, output or both directions of Port Mirroring

observed interface are copied intact to the observing interface. It’s used for testing or maintenance the traffic without traffic interrupting.

QoS Flow Control Priority-based Flow Control Quality of

(PFC)

Service

Please refer to “chapter 2.12 Ethernet QoS”. Adjust the traffic rate according to the radio throughput capacity, comply with IEEE 802.3 x. Priority-based Flow Control, comply with 802.1Qbb. The PIS technology is going to classify the services into 2 ranks. The one with lower priority

Packet Intelligent

will be cut into fragments while the other high

Segment (PIS)

priority services will be transmitted directly. With PIS function, long time delay and jitter of high priority services could be avoided. 802.3ad/802.1ax ; Widely used for Ethernet line protection and air interface load balance; Static (with LACP) and manual (without LACP) aggregation;

Reliability

LAG/Enhanced

Load balance is realized by XOR and hash

LAG

algorithm: LAG - based on MAC address, IP address (IPv4/IPv6); Enhanced LAG - based on MAC address, IP address (IPv4/IPv6), MAC/MPLS/IP V4/IP V6 packet identification.

PLA

22

Physical layer aggregation (PLA) is specially

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ZXMW NR8120A & NR8120D Product Description

Item

Feature

Description used for air interface aggregation and load balance; PLA can divide the services into several channels but need no protocols, which brings high utilization of radio resources. ITU G.8032v1 Ethernet single ring protection

ERPS

switching; ITU G.8032v2 Ethernet multiple ring protection switching.

ELPS

Comply with ITU G.8031 Ethernet Linear Protection Switching. STP comply with IEEE 802.3d;

STP/RSTP/MSTP

RSTP comply with IEEE 802.3W; MSTP comply with IEEE 802.1s. Port blocking feature is possible to prevent forwarding of frames from a given ingress port to

Port Blocking

one or more egress ports. With port blocking, flows of leaves can be isolated to each other in a tree topology.

ETH OAM

IEEE 802.1ag CFM, ITU-T Y.1731 ETH OAM. E2E TDM trail provisioning and management;

Service Management

IEEE 802.3ah EFM;

End-to-End (E2E) Management

E2E Ethernet service provisioning and management; E2E CES configuration; E2E QoS configuration.

2.9

Load Balance The NR8120A/D supports Ethernet traffic load balance at line and radio side. Three kinds of techniques are used: Physical Layer Aggregation (PLA), Link Aggregation Group (LAG) and Enhanced LAG. 

PLA can send one Ethernet stream to far end through several radio channels, which is very useful for delivering large streams. It’s an intelligent way of increasing

ZTE Confidential & Proprietary

23

ZXMW NR8120A & NR8120D Product Description

bandwidth utilization by adjusting the radio channels’ throughputs dynamically according to their forwarding efficiency. 

LAG can realize multi-channel load balance by XOR and hash algorithm based on MAC address, IP address (IPv4/IPv6);



Enhanced LAG can deliver different streams into different radio channels according to XOR/hash algorithm based on MAC/IP address (IPv4/IPv6), port ID, VLAN ID, Ethernet type, MPLS label.

Note: 1.

LAG/Enhanced LAG will send the same stream through the same radio channel except the channel is failed.

2.

Only one of the above techniques should be applied for the same aggregation group.

3.

The 802.3ad or 802.1ax standard specifies that all ports in a LAG must have the same data rate and must be configured as full duplex.

2.9.1

LAG/Enhanced LAG for Ethernet Line Protection LAG/Enhanced LAG can be also used for link redundancy/protection. Multiple LAN connections between two nodes can be grouped in a logical bundle. When a link of the group fails the traffic will be switched to other operational links. For a link failure the switch from failed path to operational path takes less than 50 ms and does not impact the service. As shown in Figure 2-5, path 1 and path 2 belongs to one LAG. Normally, the streams between the Microwave and the third party equipment are transferred through the two paths. Once path 1 is broken; the streams of path 1 will be switched to path 2. LAG function is usually used at important connection site for line protection between microwave IDU and other equipment.

24

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description

Figure 2-5

Ethernet line protection

3rd party switch

1 2 LAG

2.10

Double Spectrum Efficiency: XPIC (CCDP) Co-Channel Dual Polarization (CCDP) with Cross Polarization Interference Canceller (XPIC) technology is one of the best ways to enhance spectral efficiency. With this function, one frequency source could be used as two carriers to double the throughput. A high performance dual-polarized antenna should be used to minimize the cross-polarization interference. Figure 2-6

XPIC description Vertical

Freq 1

660Mbps

Horizontal

660Mbps 56MHz@2048QAM

½ * Frequency source 2 * Capacity

Common scenarios: 

ZTE’s XPIC could work alongside with ACM function and 1+1 protection scheme, which can deliver a wireless backhaul solution with enhanced availability, high reliability and high throughput.



PLA or LAG/enhanced LAG is usually used in XPIC radio link to achieve load balance and high throughput

2.11

Header Compression In order to improve the transmission efficiency and the throughput under the limited radio source, an encapsulation efficiency technology called Frame Header Compression is

ZTE Confidential & Proprietary

25

ZXMW NR8120A & NR8120D Product Description

adopted by NR8120A/D. This technology can compress the header fields of L2 to L4 packet, such us Ethernet packet on L2, IP packet on L3, UDP on L4. Besides that, this technology can also compress MPLS packet. The Ethernet throughput could be increased to 320% maximally (based on IPV6 data, L2 to L4 header compression). Note: The actual increased throughput depends on the packet size and compression scheme.

2.12

Ethernet QoS The Quality of Service (QoS) indicates the performance of data stream over a network. It promises to provide end-to-end services of high quality for users by resolving network delay and congestion problems. In case of network overload or congestion, QoS ensures high priority traffics. The following features are supported: Table 2-4

QoS features

Feature

Description Flow classification based on: ingress port, IPv4 ToS/DSCP, IPv6 TC, 802.1p C-VLAN Pbit/S-VLAN Pbit, 802.1q C-VLAN ID/S-VLAN ID, TCP/UDP source/destination port number,

Flow Classification

source/destination MAC address, source/destination IP address, Ethernet type and MPLS TC (EXP). Mark DSCP (according to ACL classification) / Outer VLAN tag priority (according to queue mapping) CAR supports: single-rate three-color marker (RFC2697) and

Ingress Policy

two-rate three-color marker (RFC2698), both of them can work at color-blind and color-aware mode. CIR, PIR, CBS and PBS with 64kbit/s step size. 8 CoS (class of service) via 8 priority queues: BE, AF1, AF2,

Queue Schedule

AF3, AF4, EF, CS6, and CS7. Schedule scheme: SP, WRR, DWRR, WFQ, SP+WRR, SP+DWRR. SP+WFQ.

26

Egress Shaping

Queue or egress port based shaping at 64 Kbps step size.

Congestion

Tail drop, RED (Random Early Detection) and WRED

Management

(Weighted Random Early Detection).

Priorities of Different

Priority sequence:

Services

Native STM-1s > native E1s > Ethernet. E1 or STM-1

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ZXMW NR8120A & NR8120D Product Description

Feature

Description channels can be also assigned with different priorities to enable differentiated E1 or STM-1 dropping during severe link degradation (when ACM is enabled). The priorities of CES E1s or VC-12s of ch.STM-1 are assigned by the Ethernet priorities of the emulated TDM service. (Note: STM-1 feature will be released in future.) HQoS is dedicated to offer user level services of sophistication. It supports four layers of scheduling with 1000 queues, including business layer, user layer, user group layer

HQoS

and port layer, and it also supports export speed limit for each layer. Through different layers of scheduling mechanism, HQoS can realize delicacy service quality control.

2.13

Ethernet OAM IEEE 802.3ah complied Ethernet link OAM, IEEE 802.1ag and ITU-T Y.1731 complied Ethernet service OAM is supported by NR8120A/D. As shown in Figure 2-6, they provide E2E and hierarchical Ethernet OAM for our customer’s network. Figure 2-7

E2E and hierarchical Ethernet OAM

Access

Aggregation

Metro Router CS

2+0 XPIC Ring Base Station RNC P2P OAM

P2P OAM

802.3ah ETH Line OAM E2E OAM (Aggregation)

E2E OAM (Metro) 802.1ag/Y.1731 ETH Service OAM

E2E OAM (Whole Microwave Network)

P2P: Point-to-Point E2E: End-to End

ZTE Confidential & Proprietary

Maintenance association End Point

802.1ag/Y.1731 ETH Service OAM

Maintenance Association Intermediate Point

27

ZXMW NR8120A & NR8120D Product Description

2.13.1

Ethernet Link OAM Ethernet Link OAM supports fault management on Ethernet links according to IEEE 802.3ah (also called “EFM”) and provides fault management and performance monitoring in the Metro Ethernet Network (MEN) access link. It is used in physical line connection scenario (Note: Ethernet Link OAM is only supported for LAN interfaces ). The three main Ethernet Link OAM areas are supported: 1.

Link Performance Monitoring

Link performance monitoring is used for event notification on error frames at both near and far end and is used on NEs in operation. The notifications are based on a threshold crossing within a specific time window. 2.

Failure Notification

Notices the Ethernet link failure to the far end that in OAM operation. 3.

Remote Loopback

Link OAM remote loopback can be used for fault localization and link performance testing on LAN interfaces.

2.13.2

Ethernet Service OAM IEEE 802.1ag (also called “CFM") is a standard defined by IEEE. It defines protocols and practices for OAM for paths through 802.1 bridges and local area networks (LANs). IEEE 802.1ag is largely identical with ITU-T Recommendation Y.1731, which additionally addresses performance management. The main Ethernet service OAM areas are described below.

28

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description

Table 2-5

Ethernet service OAM

Function

Description Continuity check (CC) in MEN is used for the Ethernet fault

CC

Standard 802.1ag

checking, which indicates the link status between two MEPs. CC period: 3.33 ms, 10 ms, 100 ms,1 s, 10 s, 1 min, 10 min. Loopback (LB) is used for fault confirmation and fault

LB

location. The loopback defined in IEEE 802.1ag is a kind of unicast loopback that brings no user service interruption. Link Trace (LT) is used for fault location and route

LT

discovery. When this function is enabled, the service route and failure point of the demand link is list. Frame Loss Measurement (LM) is used to measure

LM

Y.1731

Ethernet end-to-end frame lost ratio, which is lunched by the network manager. Both single side and double side LM is supported by the NR8120A/D. Frame Delay Measurement (DM) is used for on-demand OAM to measure Ethernet end-to-end frame delay and

DM

frame delay variation. Both one-way and two-way DM is supported (Note: One-way DM requires time synchronization of the NEs. Two-way DM is used for time delay test).

RDI

Remote Defect Indication (RDI) informs the remote MEP there is a fault occurred at local MEP. Alarm Indication Signal (AIS) suppresses alarms at the

AIS

client-layer MEPs after detecting a fault or an AIS condition at the server-layer MEP. Locked Signal (LCK) suppresses the alarms generated by

LCK

out-of-service management or testing. The MEPs which received LCK information will ignore the link failure caused by the test. Testing signal (TST) is used for Ethernet throughput and

TST

packet loss rate testing, including in-service or out-of-service testing.

R-APS

ZTE Confidential & Proprietary

Ring-Automatic Protection Switching (R-APS) provides switching signal for G.8032 ring protection.

29

ZXMW NR8120A & NR8120D Product Description

2.14

Microwave Security NR8120A/D can prevent unauthorized logins and operations, ensuring network, radio link and equipment management security.

2.14.1 Radio Link Security Identification (Link Security ID) Link Security Identification (link security ID) is used to avoid mismatch between two radio links. Two ends of a radio link with different radio link IDs will not communicate each other even if they have other proper configurations. It’s a good way of preventing undesired link connection to improve network security, such as the third party malicious data interception. Alarms will be reported and the traffic will be interrupted once link ID differences between local and remote sites are detected.

2.14.2

Access Control List (ACL) Access Control List (ACL) can classify the ingress packets and implements white list and black list management to enhance the network security. White list can be created via setting ACL parameters to specify which kind of traffic that can be transferred per port. When a white list is enabled, only the frames in the white list are allowed; other traffic will be discarded. Black list can be created reversely.

2.14.3

Broadcast Storm Control Filters can be created per port to prevent broadcast and multicast storms. Individual filters are used for broadcast and multicast traffic. The limit is specified as fixed rate (frames per second). When the limit is reached, additional frames will be discarded until the frame rate is below the specified threshold. The storm control filters are list as below.

30



Broadcast packet.



Multicast packet (IP multicast/MAC multicast).



Unknown single cast packet.

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description

2.14.4

LMT Authority Local Maintenance Terminal (LMT) authority is grading to 3 levels: 1.

Administrator

2.

Operator

3.

Browse User

Administrator has the highest authority and browse user is the lowest. The OMC could set different authorization for each kind user to ensure the management security. NR8120A/D will record and send the log and configure action to the EMS server.

2.14.5 Radio Link Encryption Radio link encryption function using AES algorithm to encrypt radio data, thus preventing the third parties unauthorized access to microwave transmission network. This function can effectively prevent transmit data to be illegally obtain or modify. Encryption algorithms include:

2.14.6



Symmetric key algorithms: 128-bit AES



Symmetric key algorithms: 256-bit AES

Other Security Features More security features are supported shown as following: 

Secure communication channels: SNMP V1 to V3, SSH, HTTPS and SFTP.



LMT account locking.



User account disable/enable.



RADIUS (Remote Authentication Dial-In User Service) authentication.

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31

ZXMW NR8120A & NR8120D Product Description

2.15 High Accuracy Clock Supply and Synchronization NR8120A/D supports diversified clock in/out options and provides the mainstream synchronization methods. The microwave system could synchronize from local crystal oscillator, radio frame and the external clock input. NR8120A/D can also distribute clock signal to other equipments (base station for instance). The main features include: 

The clock accuracy complies with the ITU-T G.813 and ITU-T G.8263 standard, supporting three working modes: locked, holdover, free running.



Extract clock from E1 interface, radio interface, Ethernet interface and clock interface. (Note: Clock accuracy of Sync from E1 complies with G.823.)



Supports BITS (2 Mbit/s / 2 MHz) clock input or output, and supports 1PPS+ToD output



Network synchronization: Frequency synchronization (Sync. over E1, Sync. E, 1588v2 TC, BITS); Phase synchronization (1588v2 TC, Sync. E+1588v2 OC/BC)

2.16



Supports SSM/expanded SSM protocol



Supports priority-based multi clock source protection and 1588v2 BMC protection



Clock holdover time is 24 hours at least

Protection and Resilience As shown in Table 2-6, NR8120A/D provides both hardware and service protection schemes:

32

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ZXMW NR8120A & NR8120D Product Description

Table 2-6

Protection scheme

Item Power Supply

Description The power supply units support input ports protection. 1+1 HSB/SD/FD.

Radio Link

L1 (Physical layer) link aggregation (PLA) for multi-radio link. L2 link aggregation (LAG/Enhanced LAG) for multi- radio link. STP/RSTP/MSTP for ordinary Ethernet ring protection. ERPS complied with G.8032v1 and G.8032v2 for carrier Ethernet ring protection.

Ethernet Service

ELPS complied with G.8031 for carrier Ethernet linear protection. LAG/ Enhanced LAG offers redundancy connection for Ethernet line protection (interface or board level).

TDM Service

2.17

Provides PDH (VC-12 level) wireless SNCP (Max. 48×E1s per channel).

Frequency Auto-scanning Frequency scanning is a detection technique to help us to find out the interference by scanning receiver radio signal in the range of ODU’s frequency sub-band, and found a high quality microwave transmission link. The higher the receiver signal level is, the severer the interference will be. Frequency scanning is supported by NR8000 series products in range of 6 to 42 GHz. (Notes: When supporting frequency auto-scanning, the ODU model of NR8000 split-type equipments should be SRU/HRU.)

One can benefit from three aspects as follows: 

During site building, we can confirm whether there is adjacent station or overreach station interference in short time.



If the decline of transmission quality caused by poor signals during operation, maintainers can detect the interference frequency source accurately, and avoid interference by rearranging the frequency plan

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33

ZXMW NR8120A & NR8120D Product Description



This function is realized by microwave equipment without any expensive frequency scanning instrument such as spectrum analyzer to save the operating cost.

2.18

Intelligent License Control All the functions of NR8000 are prepared once the hardware is deployed. Considering a step-by-step and low risk investment, some enhanced functions are controlled by software license. Thus, capital shortage and over investing are avoided. In order to manage the license, standing on customer site, ZTE creates an industrial leading intelligent license management system, which is a kind of centralized and flexible license control solution with 3 typical features: 

Centralized license pool (License center).



Bulk import license.



Transferable license.

Figure 2-8

Intelligent license control schematic

License file can be bulk imported to the license center (separated server or share EMS server) and act as license pool. After that, the on-line network elements (NEs) will request license from license pool (or release license to license pool) automatically according to link requirement. Manual setting is also supported. Intelligent license control brings: 

34

Importing the license in bulk, save time.

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description



License can be enabled automatically, easy maintenance.



License reusing, reduce CAPEX.



License transfer, easy site relocation.



Function adjustment, optimize network performance.

2.19 Link Capacity Pass-Through (LCPT) When microwave transmission capacity changes (such as ACM regulation or PLA/LAG switchover trigger capacity changes), traditional microwave will handle transmission services based on its own configuration, usually some low-priority services will be discarded. However NR8000 provide LCPT function, which Improve network utilization and network availability. LCPT is a new E2E technique, which can be used for ZTE microwave and wireless network interaction. NR8000 equipments will send LCPT messages (customized IEEE 802.3ah OAM packets) to downstream base stations when microwave radio capacity changes. Then the base station controller will send orders to the affected base stations to adjust the traffic rate. ZTE unique LCPT function enables the base station to sense the microwave radio capacity change timely: 

Microwave radio capacity reduction: the BSC will schedule the services flexibly and the downstream base station will reduce access services accordingly;



Microwave radio capacity increase: the downstream base station will be synchronized to improve access services based on users’ requirements.

Therefore, the services will be adjusted actively by the base station instead of being discarded by the microwave equipment passively.

ZTE Confidential & Proprietary

35

ZXMW NR8120A & NR8120D Product Description

Figure 2-9

LCPT working scheme

1

MW link capacity changes

Microwave

2

3

Send LCPT message

Receive & reported LCPT message BS Controller

Base Station 4

Notice the effected BS to adjust the service access rate

2.20

Management and Maintenance

2.20.1

Full Scale Management Solution ZTE offers powerful management system of NE (Networks element) level and Network level. The following features are used in network management

Table 2-7

Network management features

Feature

Description

Benefits

Provide one NMS interface; Management (DCN) Data Communication Network)

Any GbE interface can be configured as NMS interface for DCN cascading; DCN and traffic can be isolated by

Configurable DCN bandwidth: 64 Kbps to 5 Mbps.

tagging different VLAN labels.

36

NE and Link

The EMS can discover

Auto-discovery

equipments and change

(LLDP)- Link Layer

network topology

Discovery Protocol

automatically.

Network construction and management becomes intelligent and easily.

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ZXMW NR8120A & NR8120D Product Description

Feature Route Management

Description

Benefits

Static route configuration and

Improve the flexibility of

OSPFv2 based automatic

network deployment and

route management.

reduce the TCO. Monitoring the system

System Log

System log reporting.

performance and locating the fault



Web-based Local Maintenance Terminal (LMT) offers a convenient and simply configuration method. It's an indispensable part when lack of EMS/NMS.



NetNumen™ U31, ZTE’s network management solution, provides simplified network provisioning, configuration error prevention, monitoring and troubleshooting tools that ensure better user experience, minimal network downtime and reduced expenditures on network level maintenance.

TIPS: For further information, please refer to “chapter 4 NMS: Network management system” and “NetNumen™ U31 Production Description”.

2.20.2

Wi-Fi Access for Local Management Wi-Fi solution is widely used in wireless interconnection thanks to its cost saving deployment of local area networks (LANs). Specifically, spaces where cables cannot be run, such as outdoor areas, can host wireless LANs as a cost effective solution. ZTE Wi-Fi access solution is self-designed for easier and friendly system set-up and OAM of NR8000 series products. A USB Wi-Fi module can be inserted into the USB interface on main board directly. Users can download and install the LMT app and follow the operation instruction easily as well, which is shown in Figure 2-10:

ZTE Confidential & Proprietary

37

ZXMW NR8120A & NR8120D Product Description

Figure 2-10

USB Wi-Fi module

USB Wi-Fi Module Smart Terminal or PC: Phone, Pad, Laptop

Wi-Fi NR8120A/NR8120D IDU

3

Hardware Description The NR8120A/D adopts split-mount architecture, which includes indoor unit (IDU) and outdoor unit (ODU).

3.1

IDU Structure The IDU comprises of a subrack and series of boards. The subrack is 19 inches in width and 1U in height. The hardware layout is showed in Figure 3-1. Figure 3-1

Hardware layout

Main board

Ext. card

Fan

NR8120A/D can meet different transmission requirements via configuring different function boards. All the function boards should be installed together before power on because NR8120A/D doesn’t support hot-swapping The IDU comprises three parts:

38



Main board: Radio Core and Modem Unit (RCMU), power supply unit is integrated.



Common extension card: Radio Traffic Extension Card (RTE).

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ZXMW NR8120A & NR8120D Product Description



Common fan unit: Radio Fan Unit (RFA).

The relationship of the board and IDU’s slot is declared in Table 3-1.

Table 3-1

Flexible configuration

Board

Board

Type

Name

Description

Mounting position

Radio core and modem unit C (MPLS hardware RCMUC

ready): 1×modem unit+ 4×GbE(E) +

(NR8120A

1×GbE/10GbE(O) + 1×GbE(O) + 1×EDI in +

main

1×EDI out/SC + 1×NMS + 1×LMT + 1×CLK/MON

board)

+ 1×USB + 1×PROT + 1×PLA + 2*PS (PS: power supply, -48 V DC input, 150 W output).

RCMU

Radio core and modem unit D (MPLS hardware RCMUD

ready): 2×modem unit + 4×GbE(E) +

(NR8120D

1×GbE/10GbE(O) + 1×GbE(O) + 1×EDI in +

main

1×EDI out/SC + 1×NMS + 1×LMT + 1×CLK/MON

board)

+ 1×USB + 1×PROT + 1×PLA + 2*PS (PS:

Main board

power supply, -48 V DC input, 150 W output). RTEA

RTE

RTEB

RTEC RFA

RFAE

Radio Traffic Extension Card A: native16×E1. Radio Traffic Extension Card B: native or CES 16×E1. Radio Traffic Extension Card C: 2*STM-1+16×E1 (Will be released in future). Radio Fan Unit E.

Extension Extension

Extension Fan

As shown in Figure 3-2, the relationship of the mentioned units is mainly described in the block diagram.

ZTE Confidential & Proprietary

39

ZXMW NR8120A & NR8120D Product Description

Figure 3-2

IDU block diagram

-48V -48V

POWER

Clock Process

FAN

LMT USB CLK MON (RS485)

CPU System AUX

EDI SC NMS GbE(E/O) GbE(O) /10GE(O)

ETH OAM 1588v2

Ethernet Switch

PLA E1 STM-1

MUX

PROT

IF

3.2

IF Process

Modem Process

ODU Structure ODU’s function units consist of IF signal input/output interface, RSSI interface, frequency converter, signal amplifier and low-noise amplifier. Only IF input and output interface, RSSI interface and RF interface are visible The block diagram of the ODU is described in Figure 3-3.

40

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description

Figure 3-3

ODU block diagram

3.3

Boards and Interface

3.3.1

RCMUC Figure 3-4

RCMUC board front panel GbE1 GbE2 GbE3 GbE4

CLK/MON

GbE5/10GE

GbE6

X.OUT X.IN

A GbE1

GbE2

GbE3

GbE4

ZTE中兴 ZXMW NR8120

IF GbE5/10GbE -48V -48VRTN

PS1

PS1

-48V -48VRTN

PS2

PS2

Table 3-2

PS1 PS2

GbE6

PROT

GbE5 GbE6 PROT PLA

ALM RUN

USB EDI in

EDI out/SC

NMS

LMT

EDI in EDI out/SC NMS

CLK/MON

LMT

USB

OFF

PLA

TX

RX

TX

USB

RX

TX

RX

PROT

TX

PULL

ON

X.OUT

X.IN

LINK OPWR

RX

PLA

OPWR

IF

OPWR

RCMUC interface description

Interface IF X_IN, X_OUT PROT

ZTE Confidential & Proprietary

Description IF signals input/output interface (modem IF interface). Input and output interface of the Cross Polarization Interference Cancellation signals (used for XPIC link) between two IDUs. Interactive signal for HSB/SD/FD protection between two IDUs, 10GbE optical interface.

41

ZXMW NR8120A & NR8120D Product Description

Interface

Description Interactive signal for PLA configuration between two IDUs, 10GbE

PLA

optical interface. Main board provides 6 ETH interfaces : 4*GbE electricall interface

GbE/10GbE

(GbE1 to GbE4), 1*GbE/10GbE multiplex optical interface (GbE5/10GbE) and 1*GbE optical interface (GbE6).

USB

USB-A interface for USB storage or USB Wi-Fi AP connection. Clock and monitoring multiplex interface (software switchable).

CLK/MON

CLK: 2 MHz / 2 Mbps BITS or 1PPS+ToD input/output; MON: Receive RS485 data coming from cabinet’s monitor interface.

NMS

NMS service interface.

LMT

Local maintenance and debugging interface

EDI in

External alarm interface, offers 4 alarms input.

EDI out/SC

External alarm and service channel multiplex interface, offers 1 alarms output or 1 channel V.28 asynchronous signal.

PS

-48 V DC power input interface.

OPWR

Turn on / off ODU’s power supply.

RCMUC board is used for NR8120A system control, clock procession, service switching, and modulation/demodulation, auxiliary service processing and power supply. Its specific functions are described as following: 

Performs system main control, Ethernet L2 switching and system clock synchronization function, hardware ready for SDN evolution.



MPLS-TP/IP MPLS hardware ready.



Applied for 1+0 configuration; 2+0 XPIC and 1+1 HSB/SD/FD configuration can be done with two NR8120A IDUs(Two IDUs Cascading will be released in future).



Provides QPSK/16 QAM/32 QAM/64 QAM/128 QAM/256 QAM/512 QAM/1024 QAM/1024 QAM light/2048 QAM modulation/demodulation function. Hardware prepared for 4096 QAM. 

Modulation: codes and modulates the baseband signals to IF signals and sends them to ODU through the IF interface.

42

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description



Demodulation: demodulates and decodes the IF signals coming from ODU.



Supports ACM, ATPC, PIS.



Supports under/over-voltage protection and over-current protection at IF interface.



The maximum IF cable (5D-FB types) length between IDU and ODU is 150 meters (RG-8U IF cable is 300 meters, The RG-8U is recommended for 2048 QAM and upper modulation).



Provides NMS and LMT interfaces for management.



Offers CLK and Monitor multi-use interface (software configurable). 

Input or distribute clock via CLK interface.



MON interface is used for cabinet’s environment monitoring, which complies with RS485 protocol.

Provides auxiliary interfaces: EDI (External Data Interface) and SC (Service



Channel).

3.3.2

RCMUD Figure 3-5

RCMUD board front panel GbE1 GbE2 GbE3 GbE4

CLK/MON

GbE5/10GE

GbE6

OPWR2

IF2 D

GbE1

GbE2

GbE3

GbE4

GbE5/10GbE -48V -48VRTN

PS1

-48V -48VRTN

PS2

PS1

PS2

Table 3-3

PS1 PS2

GbE6

PROT

PLA GbE5 GbE6 PROT PLA

ALM RUN

USB EDI in

EDI out/SC

NMS

LMT

EDI in EDI out/SC NMS

ZTE中兴 ZXMW NR8120

IF1

CLK/MON

LMT

USB

TX

RX

USB

TX

RX

TX

RX

PROT

TX

PULL

ON

OFF

ON

IF2

PULL

LINK1 LINK2 OPWR1 OPWR2

RX

PLA

OFF

OPWR1

IF1

OPWR2

OPWR1

RCMUD interface description

Interface IF PROT

ZTE Confidential & Proprietary

Description IF signals input/output interface (modem IF interface). Interactive signal for HSB/SD/FD protection between two IDUs, 10GbE optical interface.

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ZXMW NR8120A & NR8120D Product Description

Interface PLA

Description Interactive signal for PLA configuration between two IDUs, 10GbE optical interface. Main board provides 6 ETH interfaces : 4*GbE electricall interface,

GbE/10GbE

1*GbE/10GbE multiplex optical interface and 1*GbE optical interface.

USB

USB-A interface for USB storage or USB Wi-Fi AP connection. Clock and monitoring multiplex interface (software switchable). CLK:

CLK/MON

2 MHz / 2 Mbps BITS or 1PPS+ToD input/output; MON: Receive RS485 data coming from cabinet’s monitor interface.

NMS

NMS service interface.

LMT

Local maintenance and debugging interface

EDI in

External alarm interface, offers 4 alarms input.

EDI out/SC

External alarm and service channel multiplex interface, offers 1 alarms output or 1 channel V.28 asynchronous signal.

PS

-48 V DC power input interface.

OPWR

Turn on / off ODU’s power supply.

RCMUD board is used for NR8120D system main control, clock procession, service switching, modulation/demodulation, auxiliary service processing and power supply. Its specific functions are described as following: 

Performs system main control, Ethernet L2 switching and system clock synchronization function.



MPLS-TP/IP MPLS hardware ready.



Supports XPIC, 1+1 HSB/SD/FD configuration in one IDU.



4+0 XPIC and 2+2 XPIC HSB/SD/FD configurations can be realized with two NR8120D IDUs(Two IDUs Cascading will be released in future).



Provides QPSK/16 QAM/32 QAM/64 QAM/128 QAM/256 QAM/512 QAM/1024 QAM/1024QAM light/2048 QAM modulation/demodulation function. Hardware prepared for 4096 QAM.

44

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ZXMW NR8120A & NR8120D Product Description



Modulation: codes and modulates the baseband signals to IF signals and sends them to ODU through the IF interface.



Demodulation: demodulates and decodes the IF signals coming from ODU.



Supports ACM, ATPC, PIS.



Supports under/over-voltage protection and over-current protection at IF interface.



The maximum IF cable (5D-FB types) length between IDU and ODU is 150 meters (RG-8U IF cable is 300 meters, The RG-8U is recommended for 2048 QAM and upper modulation).



Provides NMS and LMT interfaces for management.



Offers CLK and Monitor multi-use interface (software configurable). 

Input or distribute clock via CLK interface.



MON interface is used for cabinet’s environment monitoring, which complies with RS485 protocol.



Provides auxiliary interfaces: EDI (External Data Interface) and SC (Service Channel).

3.3.3

RTEA (native 16×E1) Figure 3-6

Table 3-4

RTEA card front panel

RTEA interface description

Interface E1 (CH1-CH16)

ZTE Confidential & Proprietary

Description Access capacity: 16×E1.

45

ZXMW NR8120A & NR8120D Product Description

The RTEA extension card should be installed in extension slot if E1 interface is needed, which provides native 16×E1 service drop/access.

3.3.4

RTEB (CES/Native 16×E1) Figure 3-7

Table 3-5

RTEB card front panel

RTEB interface description

Interface E1 (CH1-CH16)

Description Access capacity: 16×E1.

RTEB provides both native and circuit emulation function, which is prepared for migrating TDM to all packet. When enable CES license, RTEB unit can emulate the native 16×E1 service that accessed at UNI side into sixteen Ethernet streams (emulated service), or re-create the emulated service from NNI side into native E1. The RTEB extension card should be installed in extension slot if CES E1 interface is needed.

3.3.5

RFAE Figure 3-8

RFAE board

The RFAE board is the system fan control board. Its specific functions are shown below: 

46

Driving three fans.

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description



Supports temperature detection and fan speed monitoring.



Supports intelligent speed adaptation.

ZTE Confidential & Proprietary

47

ZXMW NR8120A & NR8120D Product Description

4

Element Management System (EMS) ZTE provides a unified and simplified network management system for different management requirement. One of the following solutions can be chosen as a management method: 

Simplified LMT for local Maintenance.



Scalable NetNumen™ U31 for unified Maintenance.



LMT combine with U31 is suggested for full-scale management solution.

Figure 4-1

Network management solution

Database

Server B

Server A

Firewall

NMS/OSS

ZTE MW EMS

LMT ZTE MW Network

4.1

Unified EMS, Powerful Management NetNumen™ U31 is a unified element management product under ZTE's product brand--NetNumen™. As a major component of ZTE’s network management products, U31 is capable to provide consolidated network operation and maintenance for all ZTE equipments and networks. ZTE NetNumen™ U31 microwave EMS has a leading and mature management system architecture that perfectly conforms to all ITU-T TMN and 3GPP specifications. The high

48

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ZXMW NR8120A & NR8120D Product Description

scalability of NetNumen™ U31 ensures a smooth upgrade having a minimum impact on the existing system. It qualifies the following properties 

Based on the J2EE (Java 2 Enterprise Edition) platform.



Uniform management of microwave NEs.



Rich northbound interfaces such as: CORBA, SNMP, FILE and DB are available, easily to be integrated to various OSSs.



High-level UNIX servers to enable high integration, high performance and good security.



Multiple access methods such as: GUI and Web.

U31 provides powerful functions such as fault management, topology management, performance management, configuration management, E2E management, security management, log management, inventory management and various statistics reports. TIPS: Please refer to Microwave NetNumen™ U31 Product Description for detail information.

4.2

Web-based LMT, Easy Maintenance LMT is a Web-based local maintenance terminal for configuring and maintaining IDU as well as the connected ODUs at local. It is embedded in NR8120 IDU and no additional software installation is required. Users can manage the IDU via the IE browser in the PC through the LMT or NMS interface. LMT

provides

alarm

management,

configuration

management,

performance

management, maintenance management, security management, and language management. For illegal access prevention, LMT user authority is graded to 3 levels: 1.

Administrator

2.

Operator

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49

ZXMW NR8120A & NR8120D Product Description

3.

Browse User

Administrator has the highest authority and browse user is the lowest. The OMC could set different password for each kind of user to ensure the management security. Furthermore, IDU will record and send the log and configure action to the EMS serve

50

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ZXMW NR8120A & NR8120D Product Description

5 5.1

Configuration and Application NR8120A&D Typical Configurations NR8120A&D supports point-to-point, link, tree, and ring networking configurations, as shown in Table 5-1.

Table 5-1

NR8120A&D typical configurations Link Type

NR8120A

Radio Configuration

Unprotected Link

1+0

Protected Link

*1+1 HSB/SD/FD(2 IDUs)

XPIC Link

*2+0 XPIC (2 IDUs)

Unprotected Link

1+0,2+0

Protected Link

1+1 HSB/SD/FD

NR8120D

2+0 XPIC XPIC Link *4+0XPIC/2+2XPIC HSD/SD (2 IDUs)

Notes：”*” means this configuration will be released in future

5.1.1

NR8120A 1+0 Configuration NR8120A supports 1+0 networking configurations. The basic configuration 1+0 is shown in Figure 5-1.

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51

ZXMW NR8120A & NR8120D Product Description

Figure 5-1

1+0 configuration diagram

1+0

In 1+0 network configuration, the material requirement of a single site is shown in Table 5-2.

Table 5-2

1+0 configuration requirements per site

Components

5.1.2

Configuration Requirements (PCS) 1+0

RCMUC

1

ODU

1

Antenna

1

IF Cable

1

NR8120D 1+1 HSB Configuration 1+1 HSB is 1+1 hardware hot standby protection. In 1+1 HSB configuration, main ODU and standby ODU are installed on the same antenna to provide hardware level protection.

52

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ZXMW NR8120A & NR8120D Product Description

Figure 5-2

NR8120D 1+1 HSB configuration diagram

1+1 HSB

In 1+1 HSB configuration mode, the required material of single site is shown in Table 5-3.

Table 5-3

NR8120D 1+1 HSB configuration requirements per site

Components

Configuration Requirements (PCS)

RCMUD

1

ODU

2

Antenna

1

IF Cable

2

Combiner

1

Notes: The quantity and type of service interface and license depends on the actual requirement.

5.1.3

NR8120D 1+1 SD Configuration 1+1 SD provides hardware backup and is especially effective at mitigating multipath situations. In the 1+1 SD protection mode, the active ODU and standby ODU are installed on different antennas. This enables the system to receive signals from different radio links at the same time, which provides full-time hardware and wireless link protection. The diagram of 1+1 SD is shown in Figure 5-3

ZTE Confidential & Proprietary

53

ZXMW NR8120A & NR8120D Product Description

Figure 5-3

NR8120D 1+1 SD configuration diagram

1+1 SD

In 1+1 SD configuration, the required material of a single site is shown in Table 5-4

Table 5-4

NR8120D 1+1 SD configuration requirements per site

Components

Configuration Requirements (PCS)

RCMUD

1

ODU

2

Antenna

2

IF Cable

2

Notes: The quantity and type of service interface and license depends on the actual requirement.

5.1.4

NR8120D 2+0 XPIC Configuration NR8120D provide one group 2+0 XPIC configuration to double the link capacity. The diagram of 2+0 XPIC configuration is shown in Figure 5-4.

54

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description

Figure 5-4

NR8120D 2+0 XPIC configuration diagram

2+0 XPIC V H

The required material for 2+0 XPIC configuration in single site is shown in Table 5-5

Table 5-5

NR8120D 2+0 XPIC configuration requirements per site Components

Configuration Requirements (PCS)

RCMUD

1

ODU

2

Antenna

1

IF Cable

2

Notes: The quantity and type of service interface and license depends on the actual requirement.

5.2

Application Scenarios As versatile equipment, NR8120A&D can be used at terminal site in chain and ring network topology. In order to enhance the reliability and resilience, 1+1 protection configuration is usually adopted in chain network. With Ethernet STP/RSTP/MSTP,G.8032v1,G.8032v2 and wireless SNCP ring protection schemes, the service availability and management data are guaranteed. In ring network, 1+0 non-protection configuration is adopted to reduce the cost (equipment, room space and project cost).

ZTE Confidential & Proprietary

55

ZXMW NR8120A & NR8120D Product Description

5.2.1

Tree Network Tree topology is wildly used in backhaul network, which is a kind of simple and easy deployment transmission solution. Figure 5-5 shows a simply tree network: 1+0 configuration is widely adopted in access layer and 2+0 east-to-west is adopted for aggregation layer Figure 5-5

Tree network solution (hybrid)

Access

Aggregation 1+0

Metro

1+1

1+1 STM-1/4

E1 BTS

GbE

FE

1+0

Carrier Network

2+0 XPIC 1+0

Node B

E1 BTS

Microwave Network

1+0

BSC

RNC/ aGW

FE NR8120/NR8950

NR8150

NR8250

/NR8120A/NR8120D Node B

In the network, access, aggregation and metro sites might have different configurations, the ZTE’s suggestion is: 

1+0 non-protection is widely adopted in access layer. For important link, 1+1 protection configuration is a better choice.



1+1 protection configuration is usual adopted in aggregation layer, which enhance the reliability of the service. Sometimes, 2+0 FD or 2+0 XPIC function is used for high throughput link.



For minority metro sites, 1+1 protection configuration is adopted for medium capacity link and 2+2 XPIC configuration is deployed for high throughput link.



At the joint site of microwave and carrier network, link aggregation (LAG) or SNCP could offer link protection for Ethernet or TDM service.

56

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ZXMW NR8120A & NR8120D Product Description

5.2.2

Ring Network Ring topology is mainly used in aggregation layer, which offers a resilient backhaul network. This kind of network is favored by the operators who dislike 1+1 protection configuration and also the ones planning to deploy LTE/4G network. Figure 5-6 shows a simple network with ring topology, here, 1+0 configuration is widely adopt in access layer and 2+0 east-to-west is adopt for aggregation layer (ring topology part). Figure 5-6

Single ring network solution

Access

Aggregation 1+0

Metro

1+1

E1 BTS

BSC

FE

1+0

STM-1/4 Ring

Node B

GbE

Carrier Network

E1 1+0

BTS

FE NR8120/NR8950 /NR8120A/NR8120D

NR8150

NR8250

RNC /aGW

Node B

ZTE Confidential & Proprietary

57

ZXMW NR8120A & NR8120D Product Description

Figure 5-7

Multiple ring network solution

Access

Aggregation 1+0

Metro

1+1

E1 BTS

BSC

FE

1+0

STM-1/4 Ring

Node B

GbE

Carrier Network

E1 1+0

BTS

Ring

FE RNC /aGW Node B

NR8120/NR8950 /NR8120A/NR8120D

NR8150

NR8250

In the ring network, SNCP might be used to protect E1 and STM-1 services, ERPS1.0 is used to provide carrier grade single ring Ethernet protection, which solves the issue of single ring topology, while ERPS2.0 not only can be used to provide carrier grade single ring but also multiple ring Ethernet protection, as shown in Figure 5-7, which deals with the topology issue about polycyclic intersecting and polycyclic tangent. In the network, access, aggregation and metro sites might have different configurations, the ZTE’s suggestion is: 

1+0 non-protection is widely adopted at access sites. For important link, 1+1 protection configuration is used.



2+0 XPIC configuration could be used at access layer at LTE/4G times.



2+0 east-to-west configuration is widely adopted in the ring, which could reduce the CAPEX (equipment, room space and project). Sometimes, XPIC function is used for high throughput link.



For minority metro sites, 1+1 protection configuration is adopted for medium capacity link and 2+2 XPIC configuration is deployed for high throughput link.



The NR8250 of aggregation site or metro site can be connected to the BSC/RNC directly or through the carrier network.

58

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ZXMW NR8120A & NR8120D Product Description



Link aggregation (LAG) or STM-1 MSP 1+1 can offer Ethernet link protection or STM-1 line protection at the joint node between microwave and carrier network.

5.2.3

All-Packet Switching Application NR8000 is widely used for offering carrier grade Ethernet transmission where the packet based traffic is predominant, giving consideration to support the legacy TDM traffic. As shown in figure 5-8, there are only a few legacy of E1 services in the network, all packet switching network is a perfect choice for this kind of network: 

NR8120/NR8120A/NR8120D/NR8150 is deployed at terminal or repeater site to emulate TDM circuit into Ethernet.



NR8250 is deployed at BSC/RNC site to re-create TDM circuit.

Figure 5-8

All-Packet switching network scenario

E1 FE Base station

Microwave GbE

Ethernet

Fiber

RNC GbE

EPC

IP/MPLS GbE

FE/GbE

E1 /STM-1

BSC

Government CESoETH

IP/MPLS

CESoETH

All Packet

ZTE Confidential & Proprietary

59

ZXMW NR8120A & NR8120D Product Description

6

Performance and Parameters Detail parameters of the above features and hardware are specified in this chapter.

6.1

System Integrity These parameters are the basic physical description of the NR8120A/D.

6.1.1

Mechanical Characteristics Table 6-1 shows the dimensions and weights of IDU and ODU.

Table 6-1

Dimension and weight Item

Dimension (mm)

IDU ODU

6.1.2

Weight (kg)

482.6 (W) × 44.2 (H) × 199 (D)

3.5 (Fully equipped)

SRU

245.5 (W) × 261.7 (H) × 87.0 (D)

4.0

HRU

248 (W) × 275 (H) × 123 (D)

5.5

Operation Parameters The operation parameters include power supply, temperature & humidity and power consumption.

Table 6-2

Power supply

Power Module RPUB

Table 6-3

Input Voltage -48 (-60 ~ -40) V DC

Supply power for IDU & ODU

Temperature and humidity Item

60

Description

IDU

ODU

Workable Temperature

-30°C ~ 65°C

-40°C ~55°C

Guaranteed Temperature

-25°C ~ 55°C

-33°C ~ 55°C

Transportation/Storage

-40°C ~ 70°C

-40°C ~ 70°C

ZTE Confidential & Proprietary

ZXMW NR8120A & NR8120D Product Description

Item

IDU

ODU

Temperature Humidity

< 95% (35°C)

< 100%

Alarm: It is prohibited to touch the equipment when the operation environment temperature is higher than +55℃.

Table 6-4

Module power consumption

Board

Power Consumption (Max.)

Remarks

Operation Environment: 25℃ RCMUC

55 W

@ Maximum throughput

RCMUD

70 W

@ Maximum throughput

RTEA

3W

@ Fully loaded

RTEB

7W

@ Fully loaded 3 W @ Normal speed

RFAE

3W

8 W @ Fast speed 12 W @ Full speed

27 W (7/8/13/15/23/38/42 GHz) SRU ODU

29 W (28/32 GHz) 30 W (10/11/18/26 GHz)

@ Maximum transmit power

34 W (6 GHz) HRU

50 W (6/7/8/11 GHz)

@ Maximum transmit power

Notes: 1.

The actual power consumption is less than the maximum value.

2.

The power consumption of RFAE relate to the number of radio directions, service boards and the environment temperature.

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61

ZXMW NR8120A & NR8120D Product Description

Table 6-5

Power consumption (reference value) Power

Item

Consumption

Configuration (Radio and interface)

(reference value) Operation Environment: 25°C 1+0 non-protection, 16×E1+6×GbE:

1

1+1 HSB, 16×E1+6×GbE:

2

128 W

NR8120D+2×SRU (15 GHz) 2+0 east-to-west, 6×GbE:

3

6.1.3

136 W

NR8120D+2×SRU (15 GHz)

Standards Compliance Table 6-6

Complied standards

Specifications

IDU EN 301 489-1

EMC

EN 301 489-4 IEC 61000-4 EN 55022/CISPR22

ODU EN 301 489-4 IEC 61000-4 EN 55022/CISPR22

Safety

IEC 60950

IEC 60950

Shell Protection

IEC 60529 IP20

IEC 60529 IP65

Operation

ETSI EN 300 019-1-3

ETSI EN 300 019-1-4

Storage

ETSI EN 300 019-2-2

ETSI EN 300 019-2-2

Transport

ETSI EN 300 019-2-2

ETSI EN 300 019-2-2

Noise

62

87 W

NR8120A IDU+1×SRU (15 GHz)

GR-63-CORE – 1995 ETSI EN 300 753 5.2

N/A

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ZXMW NR8120A & NR8120D Product Description

6.1.4

Fault Tolerance MTBF/MTTR Fault tolerance parameters include Residual Bit Error Ratio (RBER), Mean Time To Repair (MTTR) and Mean Time Between Failures (MTBF). 

RBER