Networking Application. Engineering Requirement. Orderwire and ECC Requirements. Engineering Planning. Networking Diagram, страница 2

Each node is required to provide Ethernet services.

The trunk line adopts the 10 Gbit/s bandwidth for the future increase of traffic. All services need network-level protection. Figure 3-1 shows the position of each node and the optical cable distribution status.

Figure 3-1 Geographic position of each node and optical cable distribution status

Here lists the basic information of the project:

n  There is 10 Gbit/s backbone network between central node A and city 1.

n  Nodes A, B, C, D and E connect to each other with two-core or four-core fibers.

n  Nodes A, B, C and D are responsible for the service convergence and grooming, the fiber among them are 10 Gbit/s. The fiber between D and E is 2.5 Gbit/s.

n  A-1, A-2, B-1, D-1, D-2, E-1 and E-2 are newly constructed access nodes.

n  Nodes A, A-1 and A-2 can form a ring network of 155 Mbit/s or 622 Mbit/s according to the new route status and traffic requirement. In addition, each of the following groups can form the low-rate ring network: nodes B, B-1 and C, nodes D, D-1 and D-2, nodes E, E-1 and E-2.

n  The network management system is in central node A.

3.1.2  Service Requirement

1.  SDH Service

Table 3-2 SDH service requirement of each node

Service requirement Node	SDH service (line)	SDH service (tributary)
A	3 x STM-64	2 x STM-16 16 x STM-1(E) 16 x STM-1(O)
B	4 x STM-64	8 x STM-4 16 x STM-1(O)
C	4 x STM-64	16 x STM-1(E) 8 x STM-4
D	2 x STM-64	4 x STM-16 16 x STM-1(E)
E	2 x STM-16	2 x STM-16 16 x STM-1(E)
A-1	2 x STM-16
A-2	2 x STM-16
B-1	2 x STM-64
D-1	2 x STM-16
D-2	2 x STM-16
E-1	2 x STM-16
E-2	2 x STM-16

2.  Ethernet Service

Table 3-3 Ethernet service requirement of each node

No.	Service requirement	Source station	Sink station	Bandwidth
(1)	Point-to-point	C	A	1000 Mbit/s
(2)	Point-to-point	B	A	1000 Mbit/s
(3)	Point-to-point	D	A	1000 Mbit/s
(4)	Point-to-point	A	City1	1000 Mbit/s

3.1.3  Protection Requirement

1.  Network-Level Protection Requirement

The ring and chain require network protection with switching time less than 50 ms when there is fiber-cut or optical board fault.

2.  Ethernet Service Protection Requirement

The protection can be implemented at the SDH layer or data service layer.

3.  Equipment-Level Protection Requirement

Table 3-4 Equipment-level protection requirement

Node	Clock board backup	Cross-connect board backup	SCC backup	Power supply unit backup	Working power backup
A	Ö	Ö	´	Ö	Ö
B	Ö	Ö	´	Ö	Ö
C	Ö	Ö	´	Ö	Ö
D	Ö	Ö	´	Ö	Ö
E	Ö	Ö	´	Ö	Ö

3.1.4  Network Clock Requirement