1 General provisions
1.0.1 The specifications are applicable to the engineering design of automatically switched optical network (ASON) based on SDH.
1.0.2 Where national defense security is involved in telecommunications capital construction, the relevant requirements of the Technical provisions on implementing national defense requirements in telecommunications capital construction issued by the former Ministry of Information Industry shall be implemented.
1.0.3 The telecommunications equipment used in the engineering shall be provided with the "telecommunications equipment network access license” issued by the Ministry of Industry and Information Technology.
1.0.4 The construction of telecommunication networks in areas of seismic precautionary intensity 7 or above shall meet the requirements for seismic fortification, and the main telecommunications equipment used shall meet the requirements of YD 5083 Specification for seismic test of telecommunications equipment.
1.0.5 In case of contradiction between the specifications and relevant national standards and specifications, the relevant requirements of the latter shall prevail.
1.0.6 When, under special conditions, it is difficult to implement individual provisions of the specifications, it shall be fully justified, and a report on the measures to be taken shall be provided for approval by the competent department.
1.0.7 The engineering construction shall implement the relevant national policies and regulations on energy conservation and emission reduction.
2 Terms and symbols
English abbreviation English name
AIS Alarm Indication Signal
APS Automatic Protection Switching
ASON Automatically Switched Optical Network
AU Administration Unit
BoD Bandwidth on Demand
CR-LDP Constraint-based Routed Label Distribution Protocol
DCC Data Communications Channel
DCN Data Communications Network
ECC Embedded Control Channel
EMS Element Management System
E-NNI External Network-Network Interface (reference point)
HRDS Hypothetical Reference Digital Section
HRP Hypothetical Reference Path
I-NNI Internal Network-Network Interface (reference point)
IP Internet Protocol
LAN Local Area Network
LCT Local Craft Terminal
LMP Link Management Protocol
LOF Loss of Frame
LOP Loss of Point
LOS Loss of Signal
MCN Management Communication Network
MS Multiplex Section
MSP Multiplex Section Protection
MSTP Multi-Service Transport Platform
NMS Network Management System
OSI Open System Interconnection
OTN Optical Transport Network
OVPN Optical Virtual Private Network
PBS Provided Bandwidth Service
PC Permanent Connection
PDH Plesiochronous Digital Hierarchy
PNNI Private Network-Network Interface
QoS Quality of Service
RC Routing Controller
RSVP-TE Resource Reservation Protocol-Traffic Engineering
SC Switched Connection
SCN Signalling Communication Network
SDH Synchronous Digital Hierarchy
SLA Service Level Agreement
SNCP Subnetwork Connection Protection
SNP Subnetwork Point
SNNP Subnetwork Point Pool
SPC Soft Permanent Connection
SRLG Shared Risk Link Group
STM Synchronous Transport Module
TAP Termination and Adaptation Performer
TU Tributary Unit
UNI User-Network Interface (reference point)
VC Virtual Container
WTR Wait Time to Restore
3 Basic structure and network model
3.0.1 According to function, the ASON structure shall be divided into transport plane (TP), control plane (CP) and management plane (MP), as well as DCN for control and management communication. Figure 3.0.1 shows the interoperability among the TP, CP, MP and DCN of the ASON.
Figure 3.0.1 Relationships among the components of the ASON architecture
3.0.2 The ASON shall provide three kinds of reference points: UNI, E-NNI and I-NNI.
3.0.3 The multi-operator ASON shall support the reference model as shown in Figure 3.0.3-1, and the single-operator ASON applications shall support the reference model as shown in Figure 3.0.3-2.
Figure 3.0.3-1 Reference model for multi-operator ASON
Figure 3.0.3-2 Reference model for single-operator ASON
4 TP design
4.1 Functional requirements of transport nodes
4.1.1 The TP shall be provided with the SDH-based transport node devices.
4.1.2 The transport node devices shall be capable of providing the following types of interfaces:
1. STM-256 optical interface;
2. STM-64 optical interface;
3. STM-16 optical interface;
4. STM-4 optical interface;
5. STM-1 optical interface;
6. STM-1 electrical interface;
7. STM-4/1 ATM interface;
8. GE and 10GE Ethernet interfaces.
4.1.3 The transport node devices shall be capable of providing the following types of interfaces directly or by means of downlink low-rate device:
1. 139,264kbit/s electrical interface;
2. 44,736kbit/s electrical interface;
3. 34,368kbit/s electrical interface;
4. 2,048kbit/s electrical interface;
5. 10/100Mbit/s Ethernet interface.
4.1.4 The transport node devices shall be capable of directly providing DCN, clock synchronization and other auxiliary interfaces:
1 General provisions
2 Terms and symbols
3 Basic structure and network model
4 TP design
4.1 Functional requirements of transport nodes
4.2 Transmission model
4.3 Network organization
4.4 Trunk link setting
5 CP design
5.1 Functional requirements
5.2 Selection of CP protocol
6 MP design
6.1 General requirements
6.2 Principles for configuration of the MP
7 DCN design
7.1 General requirements
7.2 Principles for network organization
8 Auxiliary systems
8.1 Synchronization system
8.2 Business liaison system
9 Network protection and restoration
9.1 General requirements for protection and restoration
9.2 TP-based protection
9.3 CP-based protection
9.4 Network restoration
9.5 Combination of protection and restoration
9.6 Setting of network protection and restoration
10 Service requirements
11 Network reliability and security requirements
11.1 TP reliability requirements
11.2 CP reliability requirements
11.3 MP reliability requirements
11.4 DCN reliability requirements
11.5 Network security requirements
12 Service routing organization and channel arrangement
12.1 Service routing organization
12.2 Channel arrangement
13 Interconnection
13.1 Interconnection between ASON and legacy SDH
13.2 Interconnection between ASON and user network
13.3 Interconnection between ASONs of different manufacturers
14 Network planning and simulation
14.1 Network planning
14.2 Network simulation
15 Device selection, configuration and installation
15.1 Device selection
15.2 Device configuration
15.3 Installation of local station devices
16 Network performance
17 Maintenance tools and instrumentation configuration
Annex A Explanation of wording in the specifications
List of quoted standards
1 General provisions
1.0.1 The specifications are applicable to the engineering design of automatically switched optical network (ASON) based on SDH.
1.0.2 Where national defense security is involved in telecommunications capital construction, the relevant requirements of the Technical provisions on implementing national defense requirements in telecommunications capital construction issued by the former Ministry of Information Industry shall be implemented.
1.0.3 The telecommunications equipment used in the engineering shall be provided with the "telecommunications equipment network access license” issued by the Ministry of Industry and Information Technology.
1.0.4 The construction of telecommunication networks in areas of seismic precautionary intensity 7 or above shall meet the requirements for seismic fortification, and the main telecommunications equipment used shall meet the requirements of YD 5083 Specification for seismic test of telecommunications equipment.
1.0.5 In case of contradiction between the specifications and relevant national standards and specifications, the relevant requirements of the latter shall prevail.
1.0.6 When, under special conditions, it is difficult to implement individual provisions of the specifications, it shall be fully justified, and a report on the measures to be taken shall be provided for approval by the competent department.
1.0.7 The engineering construction shall implement the relevant national policies and regulations on energy conservation and emission reduction.
2 Terms and symbols
English abbreviation English name
AIS Alarm Indication Signal
APS Automatic Protection Switching
ASON Automatically Switched Optical Network
AU Administration Unit
BoD Bandwidth on Demand
CR-LDP Constraint-based Routed Label Distribution Protocol
DCC Data Communications Channel
DCN Data Communications Network
ECC Embedded Control Channel
EMS Element Management System
E-NNI External Network-Network Interface (reference point)
HRDS Hypothetical Reference Digital Section
HRP Hypothetical Reference Path
I-NNI Internal Network-Network Interface (reference point)
IP Internet Protocol
LAN Local Area Network
LCT Local Craft Terminal
LMP Link Management Protocol
LOF Loss of Frame
LOP Loss of Point
LOS Loss of Signal
MCN Management Communication Network
MS Multiplex Section
MSP Multiplex Section Protection
MSTP Multi-Service Transport Platform
NMS Network Management System
OSI Open System Interconnection
OTN Optical Transport Network
OVPN Optical Virtual Private Network
PBS Provided Bandwidth Service
PC Permanent Connection
PDH Plesiochronous Digital Hierarchy
PNNI Private Network-Network Interface
QoS Quality of Service
RC Routing Controller
RSVP-TE Resource Reservation Protocol-Traffic Engineering
SC Switched Connection
SCN Signalling Communication Network
SDH Synchronous Digital Hierarchy
SLA Service Level Agreement
SNCP Subnetwork Connection Protection
SNP Subnetwork Point
SNNP Subnetwork Point Pool
SPC Soft Permanent Connection
SRLG Shared Risk Link Group
STM Synchronous Transport Module
TAP Termination and Adaptation Performer
TU Tributary Unit
UNI User-Network Interface (reference point)
VC Virtual Container
WTR Wait Time to Restore
3 Basic structure and network model
3.0.1 According to function, the ASON structure shall be divided into transport plane (TP), control plane (CP) and management plane (MP), as well as DCN for control and management communication. Figure 3.0.1 shows the interoperability among the TP, CP, MP and DCN of the ASON.
Figure 3.0.1 Relationships among the components of the ASON architecture
3.0.2 The ASON shall provide three kinds of reference points: UNI, E-NNI and I-NNI.
3.0.3 The multi-operator ASON shall support the reference model as shown in Figure 3.0.3-1, and the single-operator ASON applications shall support the reference model as shown in Figure 3.0.3-2.
Figure 3.0.3-1 Reference model for multi-operator ASON
Figure 3.0.3-2 Reference model for single-operator ASON
4 TP design
4.1 Functional requirements of transport nodes
4.1.1 The TP shall be provided with the SDH-based transport node devices.
4.1.2 The transport node devices shall be capable of providing the following types of interfaces:
1. STM-256 optical interface;
2. STM-64 optical interface;
3. STM-16 optical interface;
4. STM-4 optical interface;
5. STM-1 optical interface;
6. STM-1 electrical interface;
7. STM-4/1 ATM interface;
8. GE and 10GE Ethernet interfaces.
4.1.3 The transport node devices shall be capable of providing the following types of interfaces directly or by means of downlink low-rate device:
1. 139,264kbit/s electrical interface;
2. 44,736kbit/s electrical interface;
3. 34,368kbit/s electrical interface;
4. 2,048kbit/s electrical interface;
5. 10/100Mbit/s Ethernet interface.
4.1.4 The transport node devices shall be capable of directly providing DCN, clock synchronization and other auxiliary interfaces:
Contents of YD/T 5144-2015
1 General provisions
2 Terms and symbols
3 Basic structure and network model
4 TP design
4.1 Functional requirements of transport nodes
4.2 Transmission model
4.3 Network organization
4.4 Trunk link setting
5 CP design
5.1 Functional requirements
5.2 Selection of CP protocol
6 MP design
6.1 General requirements
6.2 Principles for configuration of the MP
7 DCN design
7.1 General requirements
7.2 Principles for network organization
8 Auxiliary systems
8.1 Synchronization system
8.2 Business liaison system
9 Network protection and restoration
9.1 General requirements for protection and restoration
9.2 TP-based protection
9.3 CP-based protection
9.4 Network restoration
9.5 Combination of protection and restoration
9.6 Setting of network protection and restoration
10 Service requirements
11 Network reliability and security requirements
11.1 TP reliability requirements
11.2 CP reliability requirements
11.3 MP reliability requirements
11.4 DCN reliability requirements
11.5 Network security requirements
12 Service routing organization and channel arrangement
12.1 Service routing organization
12.2 Channel arrangement
13 Interconnection
13.1 Interconnection between ASON and legacy SDH
13.2 Interconnection between ASON and user network
13.3 Interconnection between ASONs of different manufacturers
14 Network planning and simulation
14.1 Network planning
14.2 Network simulation
15 Device selection, configuration and installation
15.1 Device selection
15.2 Device configuration
15.3 Installation of local station devices
16 Network performance
17 Maintenance tools and instrumentation configuration
Annex A Explanation of wording in the specifications
List of quoted standards
