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How to plan SDH networks
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SDH Network PlanningSDH Network Planning
Presented by: Presented by: Ren HailanRen Hailan
2
ContentContent☆☆ Introduction of SDH network planningIntroduction of SDH network planning☆☆ SDH network architecture SDH network architecture
☆☆ Topology of SDH networkTopology of SDH network
☆☆ SelfSelf--healing ring planninghealing ring planning
☆☆ SDH networking applicationSDH networking application
☆☆ SDH networking evolutionSDH networking evolution
3
Principles of network planningPrinciples of network planning
Requirement and ApplicationRequirement and Application–– Customer demand on network reliability and Customer demand on network reliability and
availability;availability;–– Customer demand for broadband and new services;Customer demand for broadband and new services;
Advancement and MaturityAdvancement and Maturity–– Risk taking for employing new technology;Risk taking for employing new technology;–– Financial justification on selecting a suitable Financial justification on selecting a suitable
technology;technology;
4
Principles of network planningPrinciples of network planningAbility of upgradeAbility of upgrade–– Interface that can accept old system.Interface that can accept old system.–– capable to meet the future demand ;capable to meet the future demand ;–– compatible to the existing network and future compatible to the existing network and future
network(open standard);network(open standard);
Easy to maintainEasy to maintain–– CAPEX&OPEXCAPEX&OPEX–– Training cost for operation staff to adapt to new Training cost for operation staff to adapt to new
technology;technology;–– Running cost for OA&MRunning cost for OA&M
5
Principles of network planningPrinciples of network planning
6
Network EvaluationNetwork EvaluationCost efficiency;Cost efficiency;Network robustness;Network robustness;Manageability;Manageability;Flexibility;Flexibility;Compatibility;Compatibility;
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Selection of transmission technologiesSelection of transmission technologies
Backbone networkBackbone network–– DWDM DWDM
Metro networkMetro network–– DWDMDWDM
(various types of interface, low capacity, small (various types of interface, low capacity, small coverage area, high survivability, ring topology)coverage area, high survivability, ring topology)
–– CWDMCWDM–– SDHSDH
A suitable choiceA suitable choiceMSTPMSTP
8
Definition of SDHDefinition of SDH
SDHSDH (Synchronous Digital Hierarchy)(Synchronous Digital Hierarchy)An international standard for An international standard for teletele--communication communication networknetworkA synchronous digital transport system aimed at A synchronous digital transport system aimed at providing a more simple, economical, and flexible providing a more simple, economical, and flexible telecommunications network infrastructuretelecommunications network infrastructureA technologies about integrated information A technologies about integrated information network that has combined the function of network that has combined the function of multiplexing/transmission/crossmultiplexing/transmission/cross--connection connection
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Advantages of SDH Advantages of SDH International standardInternational standard NNI NNI specificationsspecificationsBased on direct synchronous multiplexing and flexible Based on direct synchronous multiplexing and flexible mappingmappingProvide abundant builtProvide abundant built--in signal capacity for network in signal capacity for network Operation,Administration and Maintenance(OAM)Operation,Administration and Maintenance(OAM)Function of transparent transmission for information Function of transparent transmission for information payloadpayloadFunction of interconnect network equipment from different Function of interconnect network equipment from different vendorsvendorsBackward and forward compatibilityBackward and forward compatibility
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NNINNI NNINNI NNINNI NNINNI
TRTR
TRTR
TRTR
SM
SM
SM
SM
SM
SM
DXCDXCLINELINE
TRTR
TRTR
TRTR
LINELINE
NNI (Network Node Interface)NNI (Network Node Interface)
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Importance of SDH planningImportance of SDH planningSDH technology makes possible the transports SDH technology makes possible the transports of broad range of services. of broad range of services. SDH is an important technologies to construct SDH is an important technologies to construct the telecom transport network. the telecom transport network. SDH offers a large transmission capacity, SDH offers a large transmission capacity, which calls for networks able to survive serious which calls for networks able to survive serious failures in cable facilities and at equipment failures in cable facilities and at equipment sites.sites.
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Importance of SDH planningImportance of SDH planningWith its diverse network architectures, NE With its diverse network architectures, NE capabilities, and integrated planning capabilities, and integrated planning requirements, SDH completes the overall requirements, SDH completes the overall planning. planning. SDH brings new challenges in network SDH brings new challenges in network architecture interconnection and architecture interconnection and interworkinginterworking..How to utilize different architectures to meet How to utilize different architectures to meet diverse demands in an efficient manner is a diverse demands in an efficient manner is a key issue in survivable SDH network design.key issue in survivable SDH network design.
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SDH network survivability designSDH network survivability designNetwork survivability can be obtained by Network survivability can be obtained by
introducing:introducing:Redundancy inside Redundancy inside NEsNEs (e.g. spare modules)to (e.g. spare modules)to increase their reliability;increase their reliability;Spare resources (new links/capacity)to allow Spare resources (new links/capacity)to allow traffic rerouting;traffic rerouting;Network management system to handle traffic Network management system to handle traffic rerouting and to optimize the utilization of rerouting and to optimize the utilization of spare resources.spare resources.
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Network Survivability DesignNetwork Survivability DesignWhen designing a highly available network,many When designing a highly available network,many aspects must be consideredaspects must be consideredThe required survivability directly affects the The required survivability directly affects the applications and services to be supported over the applications and services to be supported over the network.network.A key criterion is the networkA key criterion is the network’’s restoration speed.s restoration speed.A network carrying voice traffic must definitely recover A network carrying voice traffic must definitely recover from any network failure within a matter of ms.from any network failure within a matter of ms.A network only carrying Internet traffic may restore A network only carrying Internet traffic may restore within only a second or less.within only a second or less.
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Network Survivability DesignNetwork Survivability DesignIt is important to realize that fast restoration mostly It is important to realize that fast restoration mostly requires a high amount of spare capacity for protection requires a high amount of spare capacity for protection purposes.purposes.Additional wavelengths or TDM channels must be Additional wavelengths or TDM channels must be reserved in order to be available for rerouting of failed reserved in order to be available for rerouting of failed traffic.traffic.Several restoration and protection mechanisms are Several restoration and protection mechanisms are available.available.Each mechanism has its specific advantages and Each mechanism has its specific advantages and disadvantages,but apart from that,the used mechanism disadvantages,but apart from that,the used mechanism must provide enough flexibility to adapt to changing must provide enough flexibility to adapt to changing network requirements.network requirements.
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Comparison of survivable networksComparison of survivable networks
ParameterParameterParameter Linear topologyLinear topologyLinear topology Self Healing RSelf Healing RSelf Healing R Mesh networkMesh networkMesh network
Spare capacityneededSpare capacitySpare capacityneededneeded moremoremore moderatemoderatemoderate lesslessless
Restored timeRestored timeRestored time fastfastfast fastfastfast slowslowslow
Network scaleNetwork scaleNetwork scale Point-to-pointPointPoint--toto--pointpoint District networkDistrict networkDistrict network Global networkGlobal networkGlobal network
Costs of nodesCosts of nodesCosts of nodes moderatemoderatemoderate LowLowLow HighHighHigh
Fibers neededFibers neededFibers needed MoreMoreMore LessLessLess ModerateModerateModerate
FlexibilityFlexibilityFlexibility LowLowLow ModerateModerateModerate HighHighHigh
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ContentContent☆☆ Introduction of SDH network planningIntroduction of SDH network planning
☆☆ SDH network architecture SDH network architecture ☆☆ Topology of SDH networkTopology of SDH network
☆☆ SelfSelf--healing ring planninghealing ring planning
☆☆ SDH networking applicationSDH networking application
☆☆ SDH networking evolutionSDH networking evolution
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Layering:Layering: A transport network can be A transport network can be decomposed into a number of independent decomposed into a number of independent transport layer networks with a client/server transport layer networks with a client/server association between adjacent layer networks. association between adjacent layer networks.
Partitioning:Partitioning: Each layer network can be Each layer network can be separately partitioned in a way which reflects separately partitioned in a way which reflects the internal structure of that layer network .the internal structure of that layer network .
Layering and PartitioningLayering and Partitioning
19
Layering and PartitioningLayering and Partitioning
Specific circuitlayer network
Specific circuitlayer network
Specific pathlayer networkSpecific pathlayer network
Transmission medialayer network
Transmission medialayer network
SubSub--networksnetworks LinksLinks
Layering ConceptLayering Concept
A layer networksA layer networks
Partitioning ConceptPartitioning Concept
20
Layering and PartitioningLayering and Partitioning
Link Connection
Trail
Network Connection
Adaption
Termination
21
Layering and PartitioningLayering and Partitioning
PartitioningPartitioning–– Reduce the management range Reduce the management range
CoreAccess AccessCPN CPN
22
Layering and PartitioningLayering and PartitioningLayering ConceptLayering Concept: : Transport layer networksTransport layer networks
Circuit layer networks
Circuit layer Circuit layer networksnetworks
Path layer networks
Path layer Path layer networksnetworks
Transmission media layer
networks
Transmission Transmission media layer media layer
networks networks
Leased line circuit
network
Leased line Leased line circuit circuit
networknetwork
SDH VC-3 path networkSDH VCSDH VC--3 path network3 path network
64kb/s based circuit switched
network
6464kb/s based kb/s based circuit switched circuit switched
networknetworkPacket
switched network
Packet Packet switched switched networknetwork
Optical transmission
network
Optical Optical transmission transmission
networknetworkRadio
transmission network
Radio Radio transmission transmission
networknetwork
SDH VC-1n path networkSDH VCSDH VC--1n path network1n path network
Transport networkTransport network An exampleAn example
23
It is classified broadly into three classes: It is classified broadly into three classes: circuit layer network, path layer network and circuit layer network, path layer network and transmission media layer networktransmission media layer network
The association between any two adjacent The association between any two adjacent layers is a client/sever associationlayers is a client/sever association
Each layer is independent to each other Each layer is independent to each other
Each layer has its own operations and Each layer has its own operations and maintenance capabilitymaintenance capability
Layering and PartitioningLayering and PartitioningTransportTransport layerlayer networksnetworks
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Circuit layer networks:Circuit layer networks:–– Circuit layer network provides users with Circuit layer network provides users with
telecommunications services such as circuit telecommunications services such as circuit switched services, packet switched services and switched services, packet switched services and leased line servicesleased line services. .
–– Different circuit layer network can be identified Different circuit layer network can be identified according to the services provided.according to the services provided.
–– Circuit layer network is independent of path layer Circuit layer network is independent of path layer networknetwork
Layering and PartitioningLayering and PartitioningTransportTransport layerlayer networksnetworks
25
Path layer networksPath layer networks–– Path layer network is used to support different types Path layer network is used to support different types
of circuit layer networks.of circuit layer networks.
–– In the case of SDH, there are two path layer In the case of SDH, there are two path layer networks: networks: the lowerthe lower--order path layer networkorder path layer network and and the the higherhigher--order path layer networkorder path layer network..
–– The management control of the connectivity in path The management control of the connectivity in path layer networks is a key feature of SDH networks.layer networks is a key feature of SDH networks.
–– Path layer network is independent of transmission Path layer network is independent of transmission media layer network.media layer network.
Layering and PartitioningLayering and PartitioningTransportTransport layerlayer networksnetworks
26
Transmission media layer networkTransmission media layer network–– Transmission media layer network is dependent on Transmission media layer network is dependent on
the transmission media such as fiber and radio.the transmission media such as fiber and radio.
–– Transmission media layer network can be divided Transmission media layer network can be divided into section layer networks and physical media layer into section layer networks and physical media layer networks.networks.
–– In case of SDH, there are two section layer In case of SDH, there are two section layer networks: a multiplex section layer network and a networks: a multiplex section layer network and a regenerator section layer network.regenerator section layer network.
Layering and PartitioningLayering and PartitioningTransportTransport layerlayer networksnetworks
27
Layering and PartitioningLayering and PartitioningLayering Concept: Layering Concept: SDHSDH transporttransport layerlayer networksnetworks
PDH or ATM IP layer networkPDH or ATM IP layer network
VCVC--1111 VCVC--1212 VCVC--22 VCVC--33
VCVC--33 VCVC--44
Regenerator sectionRegenerator section
Physical media layerPhysical media layer
Circuit layerCircuit layer
Lower Lower orderorder
path layerpath layer
Higher Higher orderorder
path layerpath layer
Section Section layerlayer
PathPathlayerlayer
TransmissionTransmissionmediamedialayerlayer
Multiplex sectionMultiplex section
28
ContentContent☆☆ Introduction of SDH network planningIntroduction of SDH network planning
☆☆ SDH network architecture SDH network architecture
☆☆ Topology of SDH networkTopology of SDH network☆☆ SelfSelf--healing ring planninghealing ring planning
☆☆ SDH networking applicationSDH networking application
☆☆ SDH networking evolutionSDH networking evolution
29
Topology of SDH NetworkTopology of SDH NetworkItIt’’s very important to design the physical s very important to design the physical transport network layout.transport network layout.Mesh ,ring and star are the most common Mesh ,ring and star are the most common arrangements to meet various degrees of the arrangements to meet various degrees of the traffic demand ,expected traffic growth and traffic demand ,expected traffic growth and traffic distribution.traffic distribution.Sometimes in a large system ,a combination of Sometimes in a large system ,a combination of these three types is used to form one or more these three types is used to form one or more layers of a hierarchical network.layers of a hierarchical network.
30
Linear or Chain StructureLinear or Chain Structureusing TM and ADMusing TM and ADMThe simplest architecture of an SDH network is The simplest architecture of an SDH network is the point to point and linear networks where the point to point and linear networks where SDH line terminal equipment andSDH line terminal equipment and multiplexersmultiplexersare commonly used.are commonly used.
31
Star StructureStar StructureHubbingHubbing nodes can be nodes can be used to interconnect used to interconnect multiple multiple topologies ,including topologies ,including multiple rings for traffic multiple rings for traffic grooming .grooming .Both ADM and DXC Both ADM and DXC equipment are commonly equipment are commonly applied at hub sites,but applied at hub sites,but DXCDXC hubbing hubbing is more is more flexible for it provides flexible for it provides rapid provisioning and rapid provisioning and bandwidth management.bandwidth management.
32
Tree StructureTree StructureMultiplexersMultiplexers are are replaced with DXC replaced with DXC in point to point in point to point system,the system,the architecture architecture becomes more like becomes more like aa hubbinghubbingarchitecture .architecture .
33
SelfSelf--healing Ring Structurehealing Ring StructureRing topology is Ring topology is very important for very important for SDH networks. SDH networks. Two complete Two complete jointed path jointed path between any two between any two nodes;nodes;SelfSelf--healing healing recovery recovery mechanisms.mechanisms.
34
Mesh StructureMesh StructureAn ideal meshed network An ideal meshed network is defined as networks is defined as networks that have direct that have direct connections among all connections among all nodes.nodes.Meshed networks usually Meshed networks usually use DXC as the network use DXC as the network node elements .node elements .Such networks have a Such networks have a selfself--healing capability.healing capability.Meshed configuration is Meshed configuration is commonly adopted in commonly adopted in backbone ,national or backbone ,national or regional trunk networks.regional trunk networks.
35
Advantages of meshed Advantages of meshed networknetwork
Better flexibility ;Better flexibility ;Ability to handle multiple failures including Ability to handle multiple failures including node and link failures;node and link failures;Minimum spare capacity associated with Minimum spare capacity associated with protection;protection;Maximized flexibility for rapid reconfiguration;Maximized flexibility for rapid reconfiguration;Economical for large demand and high Economical for large demand and high connectivity network.connectivity network.
36
ContentContent
☆☆ Introduction of SDH network planningIntroduction of SDH network planning
☆☆ SDH network architecture SDH network architecture
☆☆ Topology of SDH networkTopology of SDH network
☆☆ SelfSelf--healing ring planninghealing ring planning☆☆ SDH networking applicationSDH networking application
☆☆ SDH networking evolutionSDH networking evolution
37
Traffic Demand Pattern Traffic Demand Pattern
Uniform traffic patternUniform traffic pattern
Such as interSuch as inter--provincial provincial network traffic network traffic distribution.distribution.
38
Traffic Demand Pattern Traffic Demand Pattern Neighboring traffic Neighboring traffic patternpattern
All traffic destined for All traffic destined for adjacent nodes only.adjacent nodes only.
Some inter Some inter ––city city network traffic network traffic distribution is similar distribution is similar to this pattern.to this pattern.
39
Traffic Demand Model Traffic Demand Model Center traffic patternCenter traffic pattern
All traffic destined for All traffic destined for one node .one node .
Access network traffic Access network traffic pattern is usual like pattern is usual like this.this.
40
1)(2
+−×
kNSTMk
KNSTMk )()1(2 −×−
Traffic Demand Model and Traffic Demand Model and Ring CapacityRing Capacity
STMSTM--N unidirectional path switched ring N unidirectional path switched ring –– the most capacity is STMthe most capacity is STM--N at any caseN at any case
TwoTwo--fiber MS shared protection ringfiber MS shared protection ring–– Center traffic pattern:STMCenter traffic pattern:STM--NN;;
–– Neighboring traffic pattern:Neighboring traffic pattern:((K/2K/2))××(STM(STM--N)N),,KK--node node numbernumber;;
–– Uniform traffic pattern:Uniform traffic pattern:kk--odd numberodd number;; kk--even numbereven number
FourFour--fiber MS shared protection ring ringfiber MS shared protection ring ring–– capacity is double of that of the twocapacity is double of that of the two--fiber MS ringfiber MS ring
41
SDH Network RoutingSDH Network RoutingSONET/SDH rings are basic elements in most SONET/SDH rings are basic elements in most survivable network architectures. Designing and survivable network architectures. Designing and operating a single ring is simple. operating a single ring is simple. However, the design of the multiple interconnected However, the design of the multiple interconnected rings in a transport network is a very complex rings in a transport network is a very complex undertaking. Network planners must consider many undertaking. Network planners must consider many possible designs with numerous degrees of freedom possible designs with numerous degrees of freedom existing in each alternative. existing in each alternative. Furthermore, as competition between service providers Furthermore, as competition between service providers intensifies, network planners are under increasing intensifies, network planners are under increasing pressure to reduce planning cycle times and minimize pressure to reduce planning cycle times and minimize capital costs.capital costs.
42
Ring Network with ChainsRing Network with Chains
43
IntersectantIntersectant RingsRings
44
Tangential RingsTangential Rings
45
Mixed networkMixed network
46
SDH Network RoutingSDH Network Routing
Length of the ring is less Length of the ring is less than 1200kmthan 1200km;;Nodes of ring Nodes of ring is between 3 and is between 3 and 1010。。Principle: try to get a traffic Principle: try to get a traffic balance balance
47
Traffic Balance for BLSR 2F/4FTraffic Balance for BLSR 2F/4FWhen planning the network capacity, one When planning the network capacity, one important issue is the consideration of traffic important issue is the consideration of traffic balance .balance .ItIt’’s special in BLSR/2F and BLSR/4F s special in BLSR/2F and BLSR/4F rings ,because the capacity of the ring is rings ,because the capacity of the ring is determined by the highest demand among determined by the highest demand among node pairs in the ring.The binode pairs in the ring.The bi--directional ring directional ring allows traffic to be split and routed in different allows traffic to be split and routed in different directions on the ring.directions on the ring.
48
ContentContent
☆☆ Introduction of SDH network planningIntroduction of SDH network planning
☆☆ SDH network architecture SDH network architecture
☆☆ Topology of SDH networkTopology of SDH network
☆☆ SelfSelf--healing ring planninghealing ring planning
☆☆ SDH networking applicationSDH networking application☆☆ SDH networking evolutionSDH networking evolution
49
SDH Network StructureSDH Network Structure
50
SDH Network Structure SDH Network Structure
SDH MeshedCore
SDH AccessRings
SDH AccessRings
SDH Metro Rings
SDH Metro Rings
Client traffic mapped into PDH/SDH
51
PC Phone Payphone 30B+D 2/4W VIF N×64Kb/s64Kb/s 2B+D E/M interface magnet interface RS232/485
GF155-03B/C
16
AN03D-R
AN03D-R
AN03D-R
1
AN03D - C
AN03W-C
V5P-02
LAN-E1
EthernetMANS2.0
STB
WRDSSAU
Wireless Digital expand frequency80km
AN03W-R
AN03W-R
1DS-CDMA20~50km
PON TDMA30 km
STM1/4 ODN
IBAS system
TV
PC
LAN
WRDS
IBAS system
LAN-E1
N-SW ATM- SW VODbusiness centerLeased line traffic DVB Video
Internet
GF9953-01
GF2488-01A
GF2488-01A
GF2488-01A
GF2488-01A
GF9953-01
DWDM(4-32xSTM-N)
STM-4
GF622-06
STM-16
STM-1GF155-03
SEMS2.0
DEMS2.0
Network solution of Network solution of fiberhomefiberhome
52
TM TM
TM
ADMADM
ADM
ADM
TM
ADM
ADMADM
ADM
ADM
ADM
ADM 4/1
1/41/4
1/4
1/4
4/44/44/4
4/4
ADM
ADM
ADM
layer1 inter-provincial network
layer2 intra-provincial network
Layer3 inter-city network
SW SW SW
Layer4local networks
Hierarchical network of china Hierarchical network of china telcomtelcom
53
The backbone of the China telecomThe backbone of the China telecom
Since 1999Since 1999,,interinter--provincial backbone are starting the provincial backbone are starting the deployment of DWDM system.deployment of DWDM system.DWDM productsDWDM products’’ manufacturers are:lucentmanufacturers are:lucent、、NECNEC、、AlcatelAlcatel、、NortelNortel、、fiberhome fiberhome 、、 huawei huawei etc.etc.G.655 fiber is adoptedG.655 fiber is adopted1010GbGb/s system/s systemThe problem exists in china telecom SDH transport The problem exists in china telecom SDH transport network network ::–– Network management in a MultiNetwork management in a Multi--vender environmentvender environment–– Problems in network protection and restoration.Problems in network protection and restoration.
54
ADM-16
ADM-16
ADM-16ADM-16
ADM-16
SDH环七36km
55km
83km
52km27km
36km
98km
12km
61km
ADM-16ADM-16
洞口E
武冈 CE
回龙寺
西岩
绥宁
石江山门
邓家铺
五一路SFC
ADM-16
50km新宁ADM-16
37km
城步
25km
ADM-16
武阳
ADM-16
高沙
ADM-16
ADM-16 41km
ADM-16
ADM-16
ADM-16
ADM-16ADM-16
ADM-16
ADM-16 ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16 ADM-16
ADM-16
ADM-16
ADM-16
ADM-16ADM-16
ADM-16
ADM-16
ADM-16
ADM-16ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16 ADM-16
ADM-16
ADM-16
ADM-16
REG-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-4
佘田桥
SDH环五
32km
52km
21km
4km
14km26km
21km
46km
36km
24km
21km
55km
新邵E
邵东C
水井头
陈家坊
寸石
新田铺
龙溪铺
界岭
仙槎桥
邮政局五一路SFC
SDH环六
37km
19km
33km
14km36km
26km
36km
26km
40km
39km
35km
五一路SFC
隆回E
横板桥
邵阳县C
白仓
五峰铺
九公桥
六都寨金石桥
高坪
滩头
SDH环三
10km
10km
10km
10km
10km
10km
10km
10km10km
10km
10km10km
樟树垅
龙须塘
火车站
遥临巷
城北路
宝庆西路S 市委
钢厂
红旗路人民巷
工业街
塔北南路五一路SFC
宝庆西路S
邵石路口
九江村翠园
三八亭观音庵
塔北路
城东
师专
江北市场
SDH环四
10km
10km
10km20km
10km
10km10km
10km
10km
10km
10km
10km
五一路SFC4km
武冈老局
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
ADM-16
TM-1
ADM-16
SDH环一
16km23km
49km
3km
10km
2km邵东C 宝庆西路S
新邵E
红旗路火厂坪
邵东老局廉桥
18km
37km
五一路SFC
4km五一路SFC
54km隆回E
59km洞口E
51km武冈
39km
96km邵阳县C
52km
新宁
62km
武冈EC57km
绥宁77km
城步
SDH环二
宝庆西路S
ADM-16
35km
下花桥
ADM-4
九龙岭
主网管
辅网管
22km黄桥
ADM-16
LANLAN
55
R8
2.5G调度环
长途局
R7水厂
荣华村
南垸
吴家山
台北路
营房村
时分复用设备
622M调度环2
常码头
唐家墩
台北路
常清花园
民权
路友谊路
营房村 R6
合作路
营房村
三阳路
江大路
黄浦路
长春路
TS3
R9十里铺
营房村 妙
墩
洪山 罗家路
长途局
长春
路东亭
洪山
R5汉南
神龙路
洪山
钟家村
十里铺
时分复用设备
622M调度环1
R3洪山
南湖
紫阳路
民主
路
积玉桥
徐东
路
R2中北
路
东亭
徐东路 尤里
村
街道口
洪山
R4罗家路青山新
工人村
徐东路
洪山
R1
徐东路
关山新
鲁巷数据局
MANMAN
56
Examples of network topology adopted by Examples of network topology adopted by some countriessome countries
Local network Local network ––STMSTM--1UPSR ring1UPSR ring
Central network Central network ––STMSTM--4/16 2/4 fiber 4/16 2/4 fiber BLSR ringBLSR ring
IndiaIndia
STMSTM--1/41/4MongoliaMongolia
STMSTM--1/41/4Bhutan Bhutan
STMSTM--1/41/4MyanmarMyanmar
SDH network capacitySDH network capacityAdministrationAdministration
57
ContentContent☆☆ Introduction of SDH network planningIntroduction of SDH network planning
☆☆ SDH network architecture SDH network architecture
☆☆ Topology of SDH networkTopology of SDH network
☆☆ SelfSelf--healing ring planninghealing ring planning
☆☆ SDH networking applicationSDH networking application
☆☆ SDH networking evolutionSDH networking evolution
58
Development trend of networkDevelopment trend of network
Packet netPacket net
Circuit switch netCircuit switch net
data
voice
Packet netPacket net
Circuit switch netCircuit switch net
ATMATM
Transport networkTransport network
video
Last networkLast network Current networkCurrent network
Future network
voice
voice
data
data
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The development trend of SDHThe development trend of SDHCircuit exchange network would continue to Circuit exchange network would continue to develop in five yearsdevelop in five years;;SDH as a leading edge technology is still SDH as a leading edge technology is still evolvingevolving;;The future optical core network needs more The future optical core network needs more SDH access equipment;SDH access equipment;SDH is still the most survivable network SDH is still the most survivable network technology at present.technology at present.
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The development trend of SDHThe development trend of SDH1010GbGb/s SDH system has been matured.There /s SDH system has been matured.There are more and more TMs andare more and more TMs and ADMsADMs have been have been used. Some manufacturersused. Some manufacturers’’ laboratories have laboratories have developed 40Gb/s equipmentdeveloped 40Gb/s equipmentThe transmission experiments of 160Gb/s The transmission experiments of 160Gb/s ETDM and 640Gb/s OTDM have been ETDM and 640Gb/s OTDM have been developed successfully.developed successfully.SubSub--STMSTM--0 system has been standardized, 0 system has been standardized, SDH product is being used in access network .SDH product is being used in access network .
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The development trend of SDHThe development trend of SDH
Modern times
Telecommunication network
supported by
Computer-based integrated network
management and maintenance
Customer needs
Faster provisioning of circuits and services
Traditional timesTraditional times
PointPoint--toto--Point Point TransmissionTransmission
supported bysupported by
Manual approach to Manual approach to network network
management and management and maintenancemaintenance
Changing Network Requirements
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SDH FutureSDH Future
SDHSDH→→ MSTP MSTP →→ ASTN/ASONASTN/ASON(DWDM (DWDM →→ OTN OTN →→ ASTN/ASON)ASTN/ASON)
Core network Core network →→ Convergence network Convergence network →→Edge network Edge network