Carrier Aggregation User Guide [PDF]

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OptiX RTN 900 Radio Transmission System V100R019C00

CA User Guide

Issue

01

Date

2019-08-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2019. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.

Trademarks and Permissions and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.

Notice The purchased products, services and features are stipulated by the contract made between Huawei and the customer. All or part of the products, services and features described in this document may not be within the purchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information, and recommendations in this document are provided "AS IS" without warranties, guarantees or representations of any kind, either express or implied. The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but all statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd. Address:

Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China

Website:

https://www.huawei.com

Email:

[email protected]

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Contents

Contents 1 About This Document.................................................................................................................. 1 2 CA Solution Overview................................................................................................................. 3 3 Feature Description....................................................................................................................... 5 3.1 Principles........................................................................................................................................................................ 5 3.2 System Configuration..................................................................................................................................................... 6 3.2.1 System Configuration (RTN 950/RTN 950A/RTN 980)............................................................................................. 6 3.2.2 System Configuration (RTN 905 2F)........................................................................................................................ 14 3.3 Specifications................................................................................................................................................................16 3.4 Availability................................................................................................................................................................... 18 3.5 Feature Updates............................................................................................................................................................ 18 3.6 Feature Dependencies and Limitations.........................................................................................................................18 3.7 Planning Guidelines......................................................................................................................................................19

4 Deployment Guide......................................................................................................................20 4.1 Overall Deployment Process........................................................................................................................................ 20 4.2 Configuration Process...................................................................................................................................................21 4.3 Configuration Example.................................................................................................................................................22 4.3.1 Networking Diagram................................................................................................................................................. 22 4.3.2 Configuration Process................................................................................................................................................23

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1 About This Document

1

About This Document

Related Versions The following table lists the product versions related to this document. Product Name

Version

OptiX RTN 900

V100R019C00

This document describes the principles, features, deployment of the CA solution.

Intended Audience This document is intended for the following readers: l

Network planning engineers

l

Site deployment engineers

l

O&M engineers

l

Site engineers

Familiarity with the basic knowledge related to digital microwave communication technology will help you apply the information in this document.

Symbol Conventions The symbols that may be found in this document are defined as follows. Symbol

Description Indicates a hazard with a high level of risk which, if not avoided, will result in death or serious injury.

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Symbol

1 About This Document

Description Indicates a hazard with a medium level of risk which, if not avoided, could result in death or serious injury. Indicates a hazard with a low level of risk which, if not avoided, could result in minor or moderate injury. Indicates a potentially hazardous situation which, if not avoided, could result in equipment damage, data loss, performance deterioration, or unanticipated results. NOTICE is used to address practices not related to personal injury. Supplements the important information in the main text. NOTE is used to address information not related to personal injury, equipment damage, and environment deterioration.

General Conventions The general conventions that may be found in this document are defined as follows. Convention

Description

Times New Roman

Normal paragraphs are in Times New Roman.

Boldface

Names of files, directories, folders, and users are in boldface. For example, log in as user root.

Italic

Book titles are in italics.

Courier New

Examples of information displayed on the screen are in Courier New.

Change History Changes between document issues are cumulative. Therefore, the latest document issue contains all the changes made in earlier issues.

Issue 01 (2019-08-30) This is the first release.

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2 CA Solution Overview

2

CA Solution Overview

This section describes the carrier aggregation (CA) solution and its core values. With the rapid development of networks, the 5G microwave transmission era is upon us. The rapid growth of bandwidth poses new requirements and challenges for microwave. l

The currently mainstream 28 MHz bandwidth cannot meet the ever-increasing bandwidth requirements.

l

Continuous large bandwidth such as 56 MHz, 112 MHz, or 224 MHz is difficult to obtain and may cause more network interference.

l

Combining discontinuous spectrums requires an independent transceiver system to be connected in combination mode. This causes a lot of problems, such as complex configurations, more ODU hardware, more IF cables, large tower space usage, and high maintenance costs.

CA can aggregate multiple dispersed channels to provide a larger logical bandwidth, addressing large-capacity microwave transmission for future 5G networks. CA that aggregates n channels is called nCA configuration. For example, 2CA configuration means that two channels are aggregated into one channel. 2CA configuration is equivalent to 2+0 configuration. Figure 2-1 CA

The traditional N+0 configuration requires N ODUs for link transmission. To perform an expansion, new hardware must be added, such as IF boards, ODUs, hybrid couplers, and antennas. When the XMC-5D ODU is used for CA capacity expansion, hardware and maintenance costs are reduced, installation is simplified, and deployment efficiency is improved. CA technology can also be used with spectral efficiency technologies such as Issue 01 (2019-08-30)

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2 CA Solution Overview

XPIC and MIMO to provide larger-bandwidth solutions, for example, CA+MIMO and CA +XPIC. In Huawei's latest ISM8+XMC-5D dual-channel ODU solution, each channel supports 2CA and the sum of aggregated spectrums can be up to 112 MHz. The total dual-channel capacity is expected to reach about 2.5 Gbit/s. Figure 2-2 Huawei CA solution

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3 Feature Description

3

Feature Description

CA can aggregate multiple dispersed channels to provide a larger logical bandwidth. 3.1 Principles This section describes basic principles of CA. 3.2 System Configuration This section describes the typical system configuration of the CA solution. 3.3 Specifications This section lists the specifications of the CA feature supported by RTN devices. 3.4 Availability This section describes the types of boards and devices that support the CA feature. 3.5 Feature Updates This section provides a history of CA updates. 3.6 Feature Dependencies and Limitations 3.7 Planning Guidelines When planning CA, comply with the corresponding principles.

3.1 Principles This section describes basic principles of CA. The 2CA transmit end is used as an example to describe basic principles of CA. 1.

Service signals are allocated to two channels of the modem unit through the multiplexing unit and then modulated into two channels of digital signals.

2.

Digital signals are converted into IF signals through the IF unit and then combined into one channel of IF signal through the IF combination unit.

3.

The combined IF signal is sent to the RF unit.

4.

The RF unit divides the received one-channel IF signal into two channels of IF signals and sends them to two transmit units separately.

5.

Two channels of carriers are converted into the required frequency intervals and then combined into one channel of signal through the RF aggregation unit.

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3 Feature Description

The aggregated signal is converted into the required frequencies. Figure 3-1 Schematic diagram of CA

3.2 System Configuration This section describes the typical system configuration of the CA solution.

3.2.1 System Configuration (RTN 950/RTN 950A/RTN 980) The RTN 950, RTN 950A, and RTN 980 support multiple CA configuration scenarios. RTN 950, RTN 950A, and RTN 980 support eight typical configuration scenarios: l

Intra-board 2CA

l

Intra-board 2CA+ (1+1) protection

l

2 x 2CA

l

2 x 2CA+ (1+1) protection

l

Intra-board XPIC+inter-board 2CA

l

Intra-board XPIC+inter-board 2CA+ (1+1) protection

l

Inter-board XPIC+intra-board 2CA

l

Inter-board XPIC+intra-board 2CA+ (1+1) protection

The RTN 950 is used as an example to describe the typical configuration of CA.

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3 Feature Description

Figure 3-2 Typical configuration of intra-board 2CA

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Figure 3-3 Typical configuration of intra-board 2CA+ (1+1) protection

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Figure 3-4 Typical configuration of 2 x 2CA

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Figure 3-5 Typical configuration of 2 x 2 CA+ (1+1) protection

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Figure 3-6 Typical configuration of intra-board XPIC+inter-board 2CA

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Figure 3-7 Typical configuration of intra-board XPIC+inter-board 2CA+ (1+1) protection

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Figure 3-8 Typical configuration of inter-board XPIC+intra-board 2CA

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Figure 3-9 Typical configuration of inter-board XPIC+intra-board 2CA+ (1+1) protection

The bandwidth, modulation scheme, transmit power, and T/R spacing must be set to the same values for CA subcarriers.

3.2.2 System Configuration (RTN 905 2F) The RTN 905 2F supports multiple CA application scenarios. The RTN 905 2F supports three typical application scenarios: l

Intra-board 2CA

l

2 x 2CA

l

Intra-board XPIC+ cascading 2CA

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Figure 3-10 Typical configuration of intra-board 2CA

Figure 3-11 Typical configuration of 2 x 2CA

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Figure 3-12 Typical configuration of intra-board XPIC+ cascade 2CA

l The bandwidth, modulation scheme, transmit power, and T/R spacing must be set to the same values for CA subcarriers. l When cascading CA is configured, the following two scenarios are possible: l

When the cascading communication is normal, you only need to configure CA on any NE and the other NE automatically synchronizes with the CA configuration.

l

When the cascading communication is interrupted (for example, because the cascading cable is removed), if CA has been configured on both the master and slave NEs or only the master NE, you need to restore the cascading communication recovers (for example, by reconnecting the cascading cable) and initiate configuration synchronization on the master NE.

3.3 Specifications This section lists the specifications of the CA feature supported by RTN devices. Table 3-1 Specifications of CA

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Item

RTN 905 2F

ODU type

XMC-5D

CA type

Cascading/Noncascading

RTN 950

RTN 950A

RTN 980

Non-cascading

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Item

RTN 905 2F

RTN 950

RTN 950A

RTN 980

Bandwidth range for subcarriers

14/28/40/56 MHz

Modulation scheme supported by CA

2048QAM

Frequency bandwidth range for subcarriers supported by CA

450 MHz

Number of CA groups supported by a single NE

2

6

6

10 (CSHNA)

Maximum number of members supported by a CA group

2

Maximum bandwidth supported by a CA group

112 MHz (2 x 56 MHz)

Application scenarios supported

l Intra-board 2CA

l Intra-board 2CA

l 2x2CA

l 2 x 2CA

l Intra-board XPIC +cascading 2CA

l 2 x 2CA+1+1 protection

14 (CSHNU)

2

2

2

l Intra-board 2CA+(1+1) protection

l Intra-board XPIC+inter-board 2CA l Intra-board XPIC+inter-board 2CA+(1+1) protection l Inter-board XPIC+intra-board 2CA l Inter-board XPIC+intra-board 2CA+(1+1) protection

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CA HOP management

Supported

Aggregation of different frequencies

Supported

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3 Feature Description

3.4 Availability This section describes the types of boards and devices that support the CA feature. Table 3-2 Hardware Requirements Feature Name

SCC Board Type

IF Board Type

ODU Type

CA

l RTN 950: CSHU/CSHUA/ CSHUF

ISM8

XMC-5D ODU

l RTN 950A: SLF2CSHO/ CSHOF l RTN 980: CSHNA/CSHNU l RTN 905 2F: CSHP

ISM8 (integrated IF unit)

3.5 Feature Updates This section provides a history of CA updates. Table 3-3 Feature Update Version

Description

V100R0011C10

CA is first available in this version.

V100R0019C00

The RTN 950, RTN 950A, and RTN 980 support the following two additional application scenarios: l Inter-board XPIC + intra-board 2CA l Inter-board XPIC + intra-board 2CA + (1+1) protection

3.6 Feature Dependencies and Limitations Self-limitations Table 3-4 Self-limitations

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Item

Description

Bandwidth

The bandwidth of members in a CA group must be the same. The bandwidth of a single member cannot exceed 56 MHz, and the total bandwidth of all members cannot exceed 112 MHz. Copyright © Huawei Technologies Co., Ltd.

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Item

Description

Configuration requirement

The bandwidth, modulation scheme, transmit power, and T/R spacing must be set to the same values for CA subcarriers.

Working mode

Each channel of CA supports the 2CA feature only when it works in IS8 mode.

Cascade

When RTN 905 2F cascading CA, fademargin tests and sweep tests are not supported by slave members.

Dependencies and Limitations Between CA and Other Features Table 3-5 Dependencies and limitations between CA and other features Feature

Description

XPIC

l If XPIC has been configured when a CA group is configured, XPIC members must be used as the primary ports of the CA group. l A port that has been configured for XPIC cannot be used as the slave channel of a new CA group.

1+1 protection

A port that has been configured for 1+1 protection cannot be used as a member of a new CA group.

Features That Conflict with CA None

3.7 Planning Guidelines When planning CA, comply with the corresponding principles. l

The transmit power of members and T/R spacing in a CA group must be set to the same value, and the frequency interval between two channels must not exceed 450 MHz.

l

The modulation schemes (including AM) of members in a CA group must be the same. The configured transmit power and maximum transmit power cannot exceed the fullcapacity maximum transmit power.

l

The CA feature can be coupled with the PLA/EPLA/SDB/N+1/XPIC feature.

l

When creating a CA group across boards, you need to use the 10GE CA interconnection cable.

l

When configuring a CA group, you are advised to apply for a module-level maintenance window to perform operations on one channel of the XMC-5D ODU. Otherwise, services on the other channel of the XMC-5D ODU may be affected.

l

The TX Frequency, Rx Frequency, and T/R Spacing parameter settings of the primary/ secondary port must be consistent between a CA member and its peer end. The primary port of the local end cannot be interconnected with the secondary port of the peer end.

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4 Deployment Guide

4

Deployment Guide

This section describes how to commission and configure the CA solution when it is deployed. 4.1 Overall Deployment Process The purpose of site commissioning is to set up microwave links and DCN connections. 4.2 Configuration Process Before configuring CA, you must change the port mode. 4.3 Configuration Example

4.1 Overall Deployment Process The purpose of site commissioning is to set up microwave links and DCN connections. The following figure shows the overall deployment process. Figure 4-1 Overall deployment process

The operations in the configuration flowchart are described as follows.

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Table 4-1 Overall deployment process Step

Operation

Remarks

1

Commission the RTN 900 site.

Perform basic NE configurations and commission common-band links by following instructions in RTN 900 Commissioning Guide.

2

Configure a CA group.

For details about how to configure a CA group, see 4.2 Configuration Process.

4.2 Configuration Process Before configuring CA, you must change the port mode. The following figure shows the configuration process of CA. Figure 4-2 Configuration process of CA

l The maximum bandwidth of one IF cable cannot exceed 112 MHz.

The operations in the configuration flowchart are described as follows.

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Table 4-2 Configuring CA Step

Operation

Remarks

1

Change the mode of the cascading port.

If inter-board CA is required or IF port multiplexing needs to be set to inter-board IF cable multiplexing, change the mode of the cascading port on the device to CA. Retain the default values of the other parameters.

2

Change the running mode of the IF port.

Change the running mode of the IF port to IS8.

3

Change the multiplexing mode of the IF port.

l If 2CA needs to be configured, you must change the multiplexing mode of the IF port to No Conflux.

4

Configure a CA group.

When creating a CA group, you must specify the primary and secondary ports.

5

Configure XPIC/1+1 protection.

l If XPIC has been configured when a CA group is configured, XPIC members must be used as the primary ports of the CA group.

l If 2x2CA (XPIC) needs to be configured and two IF cables are used, you must change the multiplexing mode of the IF port to Share ODU.

l A port that has been configured for XPIC cannot be used as the slave channel of a new CA group. l A port that has been configured for 1+1 protection/CA cannot be used as a member of a new CA group.

4.3 Configuration Example This section uses an example to describe how to configure microwave links for intra-board XPIC+inter-board 2CA.

4.3.1 Networking Diagram This section describes the networking of NEs.

This section uses the data configured on the RTN 950 as an example to implement the CA solution. The configuration methods for other devices are similar.

NE1 and NE2 are RTN 950 NEs that are configured with intra-board XPIC+inter-board 2CA. NE1 and NE2 use the same board configuration, as shown in Figure 4-4.

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Figure 4-3 Networking diagram

Figure 4-4 Board configuration diagram

4.3.2 Configuration Process This section describes how to configure a CA group on the NMS.

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Data Preparation Table 4-3 Data plan Item

Value in This example

Planning Guideline

Cascading port mode

5-ISM8-3 and 6-ISM8-3: CA

If inter-board CA is required or IF port multiplexing needs to be set to inter-board IF cable multiplexing, change the mode of the cascading port on the device to CA. Retain the default values of the other parameters.

Running mode of the IF port

IS8

-

Multiplexing mode of the IF port

5-ISM8-2: Share ODU

l If 2CA needs to be configured, you must change the multiplexing mode of the IF port to No Conflux. l If 2x2CA (XPIC) needs to be configured and two IF cables are used, you must change the multiplexing mode of the IF port to Share ODU.

Configuring a CA group

l CA1: Primary port: 5-ISM8-1 Secondary port: 6-ISM8-1 l CA2: Primary port: 5-ISM8-2 Slave port: 6-ISM8-2

l When creating a CA group, you must specify the primary and secondary ports. l If XPIC has been configured when a CA group is configured, XPIC members must be used as the primary ports of the CA group. l A port that has been configured for XPIC cannot be used as the slave channel of a new CA group. l A port that has been configured for 1+1 protection/CA cannot be used as a member of a new CA group.

Configuring XPIC

l XPIC link information (shown in Figure 4-5) l Hybrid/AM attributes (shown in Table 4-4) l Power and ATPC information (shown in Table 4-5)

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l When the CCDP is used, the XPIC IF board must be configured and the XPIC function must be enabled. l Ensure that the transmit frequency, transmit power, T/R spacing, ATPC parameters (ATPC enabling and ATPC adjustment thresholds), channel spacing, modulation scheme, and AM parameters of links in the horizontal and vertical polarization directions of the XPIC workgroup are the same.

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Figure 4-5 Basic information about XPIC links

Table 4-4 Hybrid/AM attributes Parameter

Link 1

Link 2

E1 quantity

16

16

AM enabling

Not allowed

Not allowed

Modulation scheme

64QAM

64QAM

Table 4-5 Power and ATPC information Parameter

Link 1

Link 2

Transmit power (dBm)

6.0 (NE1)

6.0 (NE1)

6.0 (NE2)

6.0 (NE2)

–45.0 (NE1)

–45.0 (NE1)

–45.0 (NE2)

–45.0 (NE2)

Not allowed

Not allowed

Receive power (dBm)

ATPC enabling

Procedure Step 1 Change the cascading port mode of the NE to CA. Take NE1 (9-44042) for example.

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Step 2 Change the running mode of the IF port to IS8.

Step 3 Change the multiplexing mode of the IF port.

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Step 4 Create a CA group.

Step 5 Configure XPIC protection.

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