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www.huawei.com
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved.
OptiX RTN 600 Networking and
Protection
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 2
Study Guide Before the study on this course, you are supposed to:
Complete the study on the Digital Microwave Communications Principles or have the relevant knowledge.
Complete the study on the course OptiX RTN 600 Introduction.
Have the general networking knowledge of the SDH optical transmission network.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 3
References OptiX RTN 600 Product Description and OptiX RTN
600 Hardware Description in the OptiX RTN 600 Package of Documents
Digital Microwave Communications Principles
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 4
Training Purpose Upon completion of this course, you will be able
to: Describe the network application of the OptiX RTN 600. List the common networking modes of the OptiX RTN 600. List the service types and protection schemes supported by
the OptiX RTN 600. Describe the configuration requirements of the OptiX RTN
600 on each protection scheme.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 5
Table of Contents1. Network Applications and Networking Modes
of the OptiX RTN 600
2. Service Protection and Equipment Protection Schemes of the OptiX RTN 600
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 6
Network Application
The OptiX RTN 600 radio transmission system is a short haul digital microwave transmission system. Each radio frequency (RF) carrier of the RTN 600 system can transmit 4/8/16xE1 or 1xSTM-1 on the 7 GHz-38 GHz RF band.
The system provides multiple service interfaces, and it can be flexibly configured and easily installed. It can form the transmission network with the optical transmission equipment at the access layer, and can also provide backhaul links in a mobile telecommunication network or a private network.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 7
Microwave Station Type Classified by Station Type
Terminal station: It refers to the microwave station that transmits services only in one direction.
Relay station: It refers to the microwave station that transmits services in two directions and is required added to solve the problem existing in the microwave line of sight communication. The relay station is classified into two types, active relay station and passive relay station.
Add/Drop relay station: It refers to the microwave station that transmits services in two directions and adds/drops transmitted services.
Pivotal station: It refers to the microwave station that transmits services in three or more than three directions and transfers the services in transmission channels in different directions. It is also called the HUB station.
Classified by Transmit and Receive Frequency Primary station: the transmit frequency is higher than the receive frequency, also
named high station. Non-primary station: the transmit frequency is lower than the receive frequency,
also named low station.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 8
Microwave Station Type (cont.)
Terminal station
f 1’
Terminal stationPivotal
station
Add/Drop Relay station
Relay station
Terminal station
Primary station
Non-primary station
f 1
f 1’
The Primary station and the Non-primary station are usually arranged alternately in the double-frequency radio link.
Primary station
f 1 > f 1’
f 1
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 9
Microwave Station Type (cont.) Typical configuration of the OptiX RTN 600 as the
Terminal Station
Typical Configuration of the OptiX RTN 600 as the Relay Station
slot20 PXC slot3
PXC slot1PH1 slot4SCC slot2
IF1A slot7IF1A slot5
slot8SL1 slot6
SLE slot3PXC slot1
IF1A slot4SCC slot2
SLE slot3PXC slot1
IF1A slot4SCC slot2
Cable
SL1 slot3PXC slot1
IF1A slot4SCC slot2
slot20 PXC slot3
PXC slot1PH1 slot4SCC slot2
IF1A slot7IF1A slot5
slot8slot6
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 10
Microwave Station Type (cont.) Typical Configuration of the OptiX RTN 600 as the Pivotal station
slot20 PXC slot3
PXC slot1PH1 slot4SCC slot2
IF1A slot7IF1A slot5
IF1A slot8SD1 slot6
slot20 PXC slot3
PXC slot1PH1 slot4SCC slot2
IF1A slot7IF1A slot5
IF1A slot8IF1A slot6
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 11
Microwave Network Topology The following figures show the basic topologies of the microwave network.
Ring networ
k
Chain networ
k
Star networ
k
Tree networ
k
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 12
Applications of the OptiX RTN 600 Applications in the Backhaul Network of the Mobile Base Station
Terminal station in the mobile backhaul network Mobile backhaul chain network Mobile backhaul tree network
Applications in the Access Network and Private Network Microwave access network Complementary network to the SDH ring network Ring network formed by microwave equipment and SDH equipment Ring network purely formed by microwave equipment
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 13
Applications of the OptiX RTN 600 (cont.) Applications in the Backhaul Network of the Mobile Base Station
Terminal station in the mobile backhaul network
Mobile backhaul chain network
Mobile backhaul tree network
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 14
Applications of the OptiX RTN 600 (cont.) Microwave Access Network
VIP client
Service center
Businesscenter
Other client
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 15
Applications of the OptiX RTN 600 (cont.) Complementary Network to the SDH Ring Network
Radio link
Radio link Radio link
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 16
Applications of the OptiX RTN 600 (cont.) Ring Network Formed by Microwave Equipment and SDH Equipment
User network
User network
User network
User network
User network
User network
User network
Transmission network
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 17
Applications of the OptiX RTN 600 (cont.) Ring Network Purely Formed by Microwave Equipment
User network
User network
User network
User networkUser network
User network
User network
Transmission network
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 18
Questions How many microwave station types can be configured on
the OptiX RTN 600? What are them?
Does one IDU 600 can be configured as a relay station? Why?
List out four applications of the OptiX RTN 600 in the transmission network.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 19
Table of Contents
1. Network Applications and Networking Modes of the OptiX RTN 600
2. Service Protection and Equipment Protection Schemes of the OptiX RTN 600
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 20
Service Protection and Equipment Protection Schemes of the OptiX RTN 600 The service protection and equipment protect
ion schemes provided the OptiX RTN 600 are as follows:
1+1 hot standby (HSB) Microwave 1+1 space diversity (SD) Microwave 1+1 frequency diversity (FD) Sub-network connection protection (SNCP) Cross-connect and clock unit (PXC) active/standby protection
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 21
1+1 HSB Protection
Standby
Main
Service access unit
Cross-connect unit
IF unit ODU
ODU(mute)
• In the normal state
Standby
Main
Cross-connect unit
ODU(mute)
ODU
Antenna
• In the switching state
• The microwave HSB protection is also called the hot standby protection.
Service access unit
IF unit
IF unit
IF unit
Antenna
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 22
1+1 HSB Protection (cont.) The 1+1 HSB protection can provide protection for the equipment when the IF board or the ODU failed. The conditions triggering the 1+1 HSB protection switching include the ha
rdware fault of the IF unit, the hardware fault of the ODU, R_LOS, MW_LOF, R_LOC, R_LOF and MW_RDI.
The service interruption time of the 1+1 HSB protection switching is less than 1s.
Only the IDU 620 supports the 1+1 HSB protection.
The ODU must use the same sub-band and type of the Primary and Non-primary stations.
Only one antenna need be used at one station.
Two IF boards need not be configured in the paired slots.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 23
1+1 SD Protection
Standby
Main
Service access unit
Cross-connect unit
ODU
ODU(mute)
• In the normal state IF unit
Standby
Main
ODU
ODU(mute)
• In the switching state
Antenna
Service access unit
Cross-connect unit
IF unit
IF unit
IF unit
Antenna
Antenna
Antenna
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 24
1+1 SD Protection (cont.) Because of the multi-path fading, the 1+1 SD installing the main and stand
by antennas in different positions to protect the transmission channel. The conditions triggering the 1+1 SD protection switching include MW_LO
F, R_LOS, R_LOC, R_LOF, MW_FECUNCOR, and B1_SD (when the IF working mode is the PDH)/B2_SD (when the IF working mode is the SDH).
The 1+1 SD protection switching does not affect the services. Only the OptiX RTN 620 supports the 1+1 SD protection. The ODU must use the same sub-band and type of the Primary and Non-prim
ary stations.
Two antennas must be used at one station.
Two IF boards must be configured in the paired slots.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 25
1+1 FD Protection
• In the normal state
• In the switching state
Standby
Main IF unit
IF unit
f1
f2Cross-connect unit
Service access unit
Antenna
ODU
ODU
Standby
Main
Service access unit
Cross-connect unit
ODU
Antenna
IF unit
IF unit
f1
f2
ODU
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 26
1+1 FD Protection (cont.) The 1+1 FD uses the fading feature diversities between the signals of different fre
quencies in the space transmission to protect the active and standby channels in the microwave transmission.
The conditions triggering the 1+1 FD protection switching include MW_LOF, R_LOS, R_LOC, R_LOF, MW_FECUNCR, B1_SD (when the IF working mode is the PDH), and B2_SD (when the IF working mode is SDH).
The 1+1 FD protection switching does not affect the services. Only the OptiX RTN 620 supports the 1+1 FD protection. The ODU must use different sub-bands and types at the same station. Two or one antenna (the hybrid coupler must be used) can be used at one statio
n. Two IF boards must be configured in the paired slots.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 27
Summary of the Microwave Protection Schemes
Protection Scheme
Configuration Requirement Switching Condition Service Interruption
Switching Point
1+1 HSB In general, one antenna is used. There is no special requirement on the paired slot. The sub-band of the main and standby ODUs must be the same.
Hardware fault of the IF unit and ODU unit, MW_LOF, R_LOS, R_LOC, R_LOF and MW_RDI
The service interruption time is less than 1s.
Cross-connect unit
1+1 SD Two antennas must be used. There is the requirement on the paired slot. The sub-band of the main and standby ODUs must be the same.
The conditions triggering the 1+1 SD protection switching is the service fault. In this case, the MW_LOF, R_LOS, R_LOC, and R_LOF are not counted as the conditions triggering the HSB switching.
The services are not interrupted.
IF unit
1+1 FD One or two antennas can be used. There is the requirement on the paired slot. The sub-band of the main and standby ODUs should be different.
The condition triggering the 1+1 FD protection switching is the service fault.In this case, the MW_LOF, R_LOS, R_LOC, and R_LOF are not counted as the conditions triggering the HSB switching.
The services are not interrupted.
IF unit
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 28
PXC Active/Standby Protection In the normal state, the active and standby PXC work in the hot standby mode. W
hen the active unit is abnormal, the standby unit replace the original active one to providing the cross-connect and clock functions to the entire system.
The conditions triggering the PXC active/standby protection include the loss of the 38M system clock and the hardware failure.
The conditions triggering the situation that the service unit selects the PXC include loss of the system clock, loss of the service frame header, loss of the overhead clock, and loss of the overhead frame header.
The service interruption time in the PXC active/standby switching within 50 ms. Only the OptiX RTN 620 supports the PXC active/standby protection. When the sl
ots 1 and 3 are both configured with the cross-connect and clock board PXC, this protection is automatically enabled.
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 29
PXC Active/Standby Protection (cont.)
Cross-connect and clock unit
1
Service unit
3
Service signal
Service signal and clock signal
Service signal
Clock signal
• In the normal state
1
3
• In the switching state
Service unit
Cross-connect and clock unit
Cross-connect and clock unit
Clock signal
Service signal
Service signal Cross-connect and clock unit
Service signal and clock signal
Copyright © 2006 Huawei Technologies Co., Ltd. All rights reserved. Page 30
Summary Service and Equipment Protection Schemes Supported b
y the OptiX RTN 600 1+1 HSB protection 1+1 SD protection 1+1 FD protection Cross-connect and clock unit 1+1 hot standby
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