Huawei OptiX OSN 6800. Product Overview - part 4
OptiX OSN 6800 Intelligent Optical Transport Platform
Product Overview
3 Functions and Features
Category
Sub-Category
Description
MS SNCP
Protects the TBE board in conjunction with the
inter-subrack or inter-NE DBPS protection. The
protected services include 10GE services or GE
services.
ODUk
ODUk SPRing
It applies to the ring network with distributed
SPRing
protection
services. This protection uses two different ODU1
protection
or ODU2 channels to achieve the protection of
multiple services between all stations.
OWSP
OWSP
It applies to the ring networks. This protection uses
two different wavelengths to achieve the protection
of one wavelength of service between all stations.
Ethernet
DLAG
Protects the TBE board. The protected services
protection
include 10GE services and GE services.
Board-level
It is used to protect all services of the TBE board.
protection
DBPS protection
Protects the Ethernet board in conjunction with the
SW SNCP or MS SNCP or ERPS. The protected
services include 10GE services or GE services.
Ethernet ring
This protection type is based on the traditional
protection
Ethernet mechanism and uses the ring network
switching (ERPS)
automatic protection switching (R-APS) protocol to
realize quick protection switching in the Ethernet
ring network.
STP/RSTP
When the STP or RSTP is started, it logically
modifies the network topology to avoid a broadcast
storm. The STP or RSTP provides link protection
by restructuring the topology.
MSTP
In the case of the Ethernet user network where
loops exist, the MSTP generates the tree topology
according to VLAN IDs of the Ethernet packets.
Thus, the broadcast storm is avoided and the
network traffic is balanced according to the VLAN
IDs of the Ethernet packets.
LAG
In this protection mode, multiple links that are
connected to the same equipment are bundled
together to increase the bandwidth and improve link
reliability.
LPT
The link-state pass through (LPT) is used to detect
and report the faults that occur at the service access
node and in the intermediate transmission network.
The LPT notifies the equipment at two ends in the
transmission network of starting the backup
network at the earliest time for communication, thus
making sure the normal transmission of the
important data.
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OptiX OSN 6800 Intelligent Optical Transport Platform
Product Overview
3 Functions and Features
Category
Sub-Category
Description
ASON
Optical-layer
Protects services of OCh wavelength level.
protection
ASON
Electrical-layer
Protects services of ODUk wavelength level.
ASON
3.6 Data Characteristics
The OptiX OSN 6800 supports the Ethernet features and mainly supports the following
Ethernet services: EPL, EVPL (QinQ), and EPLAN.
3.6.1 OAM
The OptiX OSN 6800 provides rich OAM functions to monitor services, detect faults, and
identify faults at each service layer.
ETH-OAM
ETH-OAM improves the Ethernet Layer 2 maintenance method and provides powerful
maintenance functions for service connectivity verification, deployment commissioning, and
network fault location.
The ETH-OAM is a protocol based on the MAC layer. It checks Ethernet links by
transmitting OAM protocol packets. The protocol is independent from the transmission
medium. The OAM packets are processed only at the MAC layer, having no impact on other
layers on the Ethernet. In addition, as a low-rate protocol, the ETH-OAM protocol occupies
low bandwidth. Therefore, this protocol does not affect services carried on the link.
Comparison between ETH-OAM and the maintenance and fault locating method on the
existing network:
The current frame test method is based on only the encapsulation format where the same
type of data is contained. This test method is not applicable to other encapsulation
formats (such as GFP encapsulation format and HDLC encapsulation format) where
different types of data is contained.
The current port loopback function focuses on all packets at the port. The loopback
cannot be performed for a specific service selectively.
ETH-OAM can detect hardware faults.
ETH-OAM can detect and locate faults automatically.
Huawei Ethernet service processing boards realize the ETH-OAM function that complies with
IEEE 802.1ag and IEEE 802.3ah. The combination of IEEE 802.1ag and IEEE 802.3ah
provides a complete Ethernet OAM solution.
The IEEE 802.1ag OAM function can be achieved through the continuity test, loopback test,
link trace test, and OAM_Ping test.
The link trace (LT) test is used to locate the faulty point.
The loopback (LB) is used to test the link state bidirectionally.
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OptiX OSN 6800 Intelligent Optical Transport Platform
Product Overview
3 Functions and Features
The continuity check (CC) is used to test the link state unidirectionally.
The OMA_Ping test is used to test the in-service packet loss ratio and hold-off time.
IEEE 802.3ah OAM is realized through the OAM auto-discovery, link performance detection,
fault locating, remote loopback, self-loop test, and loop port shutdown.
The OAM auto-discovery is used to check whether the opposite end supports the IEEE
802.3ah OAM protocol.
The link performance monitoring is used to monitor the BER performance.
The fault detection is used to detect faults and inform the opposite end of the detected
faults.
The remote loopback is used to locate fault test the link performance.
The self-loop test is used to test the self-loop ports.
The loop port shutdown is used to block self-loop ports to solve the port loop problems.
RMON
Remote monitoring (RMON) is intended to monitor performance of Ethernet ports (ports and
VCTRUNK) and collect performance data for fault detection and performance reporting.
RMON supports Ethernet statistics groups and history Ethernet groups as follows:
Ethernet statistics group: supports real-time statistics and query of packet length and
packet status at an Ethernet port.
History Ethernet group: supports statistics and query of history performance data such as
packet length and packet status at an Ethernet port. This enables a user to query the
history statistics data at an Ethernet port in a given period.
Test Frame
Test frames are data packets used to test connectivity of a network that carries Ethernet
services. Test frames are mainly used to commission Ethernet services during deployment and
identify faults of Ethernet services.
Test frames can be encapsulated in GFP packets. The test frames on interconnected boards
must be encapsulated in the same format.
GFP packets: GFP management frame format. The packets are sent along the same path
as GFP management frames.
3.7 Optical Power Management
The optical power management includes IPA, IPA of Raman System, ALC, APE , EAPE, OPA
and AGC.
With the IPA, IPA of Raman System, ALC, APE, EAPE, OPA and AGC functions, the WDM
equipment of Huawei OSN series provides optical power equalization of all channels, groups
of channels and a particular channel.
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OptiX OSN 6800 Intelligent Optical Transport Platform
Product Overview
3 Functions and Features
3.8 WDM Technologies
This chapter describes the WDM technologies and functions implemented on the OptiX OSN
6800.
3.8.1 DWDM and CWDM Technical Specifications
The OptiX OSN 6800 supports two wavelength division multiplexing technologies: dense
wavelength division multiplexing (DWDM) and coarse wavelength division multiplexing
(CWDM) technologies. This section describes the technical specifications and transmission
capacity of the product using the two technologies.
There are no limits for wavelengths transmitted over G.652, G.654, and G.655 fibers used with
the OptiX OSN 6800. To realize 40-wavelength transmission, the wavelengths transmitted
over G.653 fiber should be within 196.05 THz to 194.1 THz.
DWDM includes 40-wavelength system and 80-wavelength system. The wavelengths are
in the C band compliant with ITU-T G.694.1.
− Each C-band 40-wavelength system with a channel spacing of 100 GHz can transmit
a maximum of 40 wavelengths. It supports services of 2.5 Gbit/s, 5 Gbit/s, 10 Gbit/s
and 40 Gbit/s.
− Each C-band 80-wavelength system with a channel spacing of 50 GHz can transmit a
maximum of 80 wavelengths. It supports services of 10 Gbit/s and 40 Gbit/s.
− C-band 80-wavelength systems consist of even and odd wavelengths. The
information about odd and even wavelengths is provided below:
− C_EVEN: indicates even-numbered wavelengths. In total there are 40 even
wavelengths. The center frequency of the even wavelengths is within the range of
192.100 THz to 196.000 THz (center wavelength is within the range of 1529.55 nm
to 1560.61 nm) and the frequency spacing is 100 GHz.
− C_ODD: indicates odd-numbered wavelengths. In total there are 40 odd wavelengths.
The center frequency of the odd wavelengths is within the range of 192.150 THz to
196.050 THz (center wavelength is within the range of 1529.16 nm to 1560.20 nm)
and the frequency spacing is 100 GHz.
− The 40-wavelength system can be upgraded to the 80-wavelength system smoothly.
CWDM with a channel spacing of 20 nm can access up to eight wavelengths. It applies
to services rated at 2.5 Gbit/s and 5 Gbit/s. The wavelengths are in the C band compliant
with ITU-T G.694.2.
DWDM wavelengths can be transported in the window of CWDM 1531 nm to 1551 nm to
expand the CWDM system capacity. Figure 3-6 shows the expansion of wavelength allocation.
With this expansion scheme, a CWDM system can transmit a maximum of 26 DWDM
wavelengths at 100 GHz channel spacing. If the DWDM wavelength is 50 GHz in channel
spacing, a CWDM system can transmit a maximum of 50 DWDM wavelengths.
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OptiX OSN 6800 Intelligent Optical Transport Platform
Product Overview
3 Functions and Features
Figure 3-6 DWDM wavelength expansion and allocation in the CWDM system
CWDM
DWDM
DWDM over CWDM
wavelengths
wavelengths
1529.55nm
1471nm
1471nm
1530.33nm
1531.12nm
1531.90nm
1491nm
1491nm
1532.68nm
1533.47nm
1511nm
1511nm
1534.25nm
1529.55nm
1535.04nm
-
1536.61nm
1535.82nm
10λ
1531nm
1535.61nm
1545.32nm
1551nm
16λ
1546.12nm
1545.32nm
1546.92nm
-
1547.72nm
1571nm
1571nm
1557.36nm
1548.51nm
1549.32nm
1550.12nm
1591nm
1591nm
1550.92nm
1551.72nm
1552.52nm
1553.33nm
1611nm
1611nm
1554.13nm
1554.94nm
1555.75nm
1556.55nm
1557.36nm
Figure 3-7 shows the equipment configuration in which DWDM wavelengths are transported
in the window of CWDM 1531 nm to 1551 nm. The DWDM wavelengths need to pass
through the DWDM MUX/DEMUX and CWDM MUX/DEMUX. Hence, the optical
amplifier unit needs to be configured in between.
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OptiX OSN 6800 Intelligent Optical Transport Platform
Product Overview
3 Functions and Features
Figure 3-7 Application of the DWDM wavelength in the CWDM system
OTU
OTU
OA
MUX/
MUX/
DEMUX
DEMUX
OTU
OA
MO M1
OTU
MO M1
CWDM
DWDM
3.8.2 Nominal Central Wavelength and Frequency of the DWDM
System
Table 3-9 Wavelengths and frequencies of a C-band 80-channel (spacing of 50 GHz) system
Wavele
Central
Central
Wavele
Central
Central
ngth
Frequency
Wavelength
ngth
Frequency
Wavelength
No.
(THz)
(nm)
No.
(THz)
(nm)
1
196.05
1529.16
41
194.05
1544.92
2
196.00
1529.55
42
194.00
1545.32
3
195.95
1529.94
43
193.95
1545.72
4
195.90
1530.33
44
193.90
1546.12
5
195.85
1530.72
45
193.85
1546.52
6
195.80
1531.12
46
193.80
1546.92
7
195.75
1531.51
47
193.75
1547.32
8
195.70
1531.90
48
193.70
1547.72
9
195.65
1532.29
49
193.65
1548.11
10
195.60
1532.68
50
193.60
1548.51
11
195.55
1533.07
51
193.55
1548.91
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OptiX OSN 6800 Intelligent Optical Transport
Platform
Product Overview
3 Functions and Features
Wavele
Central
Central
Wavele
Central
Central
ngth
Frequency
Wavelength
ngth
Frequency
Wavelength
No.
(THz)
(nm)
No.
(THz)
(nm)
12
195.50
1533.47
52
193.50
1549.32
13
195.45
1533.86
53
193.45
1549.72
14
195.40
1534.25
54
193.40
1550.12
15
195.35
1534.64
55
193.35
1550.52
16
195.30
1535.04
56
193.30
1550.92
17
195.25
1535.43
57
193.25
1551.32
18
195.20
1535.82
58
193.20
1551.72
19
195.15
1536.22
59
193.15
1552.12
20
195.10
1536.61
60
193.10
1552.52
21
195.05
1537.00
61
193.05
1552.93
22
195.00
1537.40
62
193.00
1553.33
23
194.95
1537.79
63
192.95
1553.73
24
194.90
1538.19
64
192.90
1554.13
25
194.85
1538.58
65
192.85
1554.54
26
194.80
1538.98
66
192.80
1554.94
27
194.75
1539.37
67
192.75
1555.34
28
194.70
1539.77
68
192.70
1555.75
29
194.65
1540.16
69
192.65
1556.15
30
194.60
1540.56
70
192.60
1556.55
31
194.55
1540.95
71
192.55
1556.96
32
194.50
1541.35
72
192.50
1557.36
33
194.45
1541.75
73
192.45
1557.77
34
194.40
1542.14
74
192.40
1558.17
35
194.35
1542.54
75
192.35
1558.58
36
194.30
1542.94
76
192.30
1558.98
37
194.25
1543.33
77
192.25
1559.39
38
194.20
1543.73
78
192.20
1559.79
39
194.15
1544.13
79
192.15
1560.20
40
194.10
1544.53
80
192.10
1560.61
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OptiX OSN 6800 Intelligent Optical Transport Platform
Product Overview
3 Functions and Features
3.8.3 Nominal Central Wavelengths of the CWDM System
Table 3-10 Nominal central wavelengths of the CWDM system
Wavelengt
Wavelength (nm)
Wavelength
Wavelength (nm)
h No.
No.
11
1471
15
1551
12
1491
16
1571
13
1511
17
1591
14
1531
18
1611
3.8.4 GE ADM
The product provides the add/drop multiplexing (ADM) function for GE service and supports
cross grooming for GE service granules.
Technical Background
At the convergence layer of the MAN, the transmission and protection of large gigabit
Ethernet (GE) services need be considered. If the WDM transmission equipment supports
service grooming at the sub-wavelength level, the WDM network can be developed from a
static network to a network that can be configured dynamically. In this situation, pass-through,
adding/dropping, and loopback for each GE service can be performed independently at any
station and these operations do not affect services in other channels. Automatic GE service
configuration can be achieved by using remote management.
Advantages in Application
The OptiX OSN 6800 DWDM provides the add/drop multiplexing (ADM) function for GE
services. It has the capability of cross-connection grooming for GE service granularity. It
achieves electrical signal-based service convergence and grooming at Layer 1, and provides
flexible and reliable networking configuration solution with a data service application in
MAN.
The OptiX OSN 6800 DWDM system uses the L4G, LDGD, LDGS, LQG, LOG, LQM,
LQMD, LQMS, LEM24, LEX4, TBE, TDG, TQM and TOM boards to achieve GE ADM.
The GE ADM technology has the following features and advantages:
5 Gbit/s line rate
The line rate of the LQG and L4G boards are 5 Gbit/s. These boards support the
transmission of 300 km without dispersion compensation. Expensive EDC or other line
coding solutions are not required. Compared with the traditional line rates of 2.5 Gbit/s
and 10 Gbit/s, the 5 Gbit/s line rate achieves the best transport cost in each bit unit
distance. See Figure 3-8.
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OptiX OSN 6800 Intelligent Optical Transport Platform
Product Overview
3 Functions and Features
Figure 3-8 Comparison of distance without dispersion compensation between the 2.5 Gbit/s, 5
Gbit/s, and 10 Gbit/s line rates
Rate
80 km
10 Gbit/s
300 km
5 Gbit/s
640 km
2.5 Gbit/s
Distance without
dispersion compensation
Dynamic network
The GE ADM technology achieves grooming at the sub-wavelength level. It dynamically
configures the network structure and transport routes, optimizes the configuration
according to the network resources, and develops the WDM network from static to
dynamic. If a network contains preserved bandwidth resources, you only need to specify
the source and sink ports on the U2000. The system automatically creates the best route
path and provides services fast.
Electrical regeneration
The GE ADM technology achieves pass-through at the electrical layer of services at the
sub-wavelength level. It also realizes the 3 R functions of the electrical regenerator.
Therefore, the special electrical regenerator board is not required and the initial
investment is decreased.
Low expansion cost
During data network expansion, the cross-connection grooming of the GE ADM
technology ensures smooth service upgrade and lowers the expansion cost.
High wavelength utilization
The GE ADM technology shares the bandwidth of the same wavelength between
different nodes and increases the bandwidth utilization of each wavelength.
End-to-end configuration and management
The GE ADM technology allows remote end-to-end configuration, management, and
monitoring of GE services on the U2000, decreasing maintenance costs.
Reliable QoS
The GE ADM provides performance monitoring and bit errors on the WDM side and the
client side. The system can monitor the status and quality of service transmission in real
time.
Implementation Scheme
The backplanes of the OptiX OSN 6800 use the high-speed data bus. With the large-capacity
space division cross-connection technology and powerful processing capacity of the Ethernet
Layer 2, the OptiX OSN 6800 DWDM system can independently distribute, converge, and
groom the GE services at the wavelength or sub-wavelength level of single equipment. The
cross-connection of each wavelength and the end-to-end management of services at the
sub-wavelength level can be achieved inside a single piece of equipment.
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OptiX OSN 6800 Intelligent Optical Transport Platform
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3 Functions and Features
With the remote configuration and management of the U2000, the GE services accessed into
the OptiX OSN 6800 DWDM system can be groomed, multiplexed, protected, looped back at
each node without affecting services in other channels.
The backplane bus with the GE ADM feature provided by the OptiX OSN 6800 DWDM
system covers the slots of the subrack.
3.8.5 Typical Application
This section describes typical PID application.
PID helps to effectively eliminate bandwidth and O&M bottlenecks on a WAN, leveraging the
features such as large capacity, high integration, versatile multi-service access, small size, and
environment-friendly design. On a WAN, a 40G/80G/120G aggregation ring based on PID
boards only is recommended, eliminating commissioning while enabling quick service
provision.
Typical network 1: WAN for a small or medium-sized city
At the OTN aggregation layer, two to six aggregation rings can be deployed with two to four
NEs in each ring. A PID board(s) is used on each NE's line side. Build a 40G/80G/120G
network using PID groups as required. On each aggregation ring, services are electrically
regenerated by the PID and cross-connect boards at each site. NEs at the OTN backbone layer
are interconnected with NEs on aggregation rings through PID boards. Figure 3-9 shows the
details.
Figure 3-9 WAN for a medium or large-sized city
40/80x10G
Backbone layer
Aggregation layer
200G ring
40G/80G ring
120G ring
: Router
: High-end router
: NG WDM equipment
: BRAS
: PID-installed NG WDM equipment at the aggregation layer
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OptiX OSN 6800 Intelligent Optical Transport Platform
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Typical network 2: WAN for a medium or large-sized city
At the OTN aggregation layer, 13 to 20 aggregation rings can be deployed with two to four
NEs in each ring. A PID board(s) is used on each NE's line side. Build a 40G/80G/120G
network using PID groups as required. On each aggregation ring, services are electrically
regenerated by the PID and cross-connect boards at each site. NEs at the OTN backbone layer
are interconnected with NEs on aggregation rings through PID boards. Figure 3-10 shows the
details.
Figure 3-10 WAN for a medium or large-sized city
80x40G Mesh
Backbone
layer
Aggregation
layer
200G ring
40G ring
80G ring
120G ring
: Router
: High-end router
: NG WDM equipment
: BRAS
: PID-installed NG WDM equipment at the aggregation layer
3.9 Clock Feature
OptiX OSN 6800 supports the physical layer clock and PTP clock to realize the
synchronization of the clock and the time.
The physical clock extracts the clock from the serial bit stream at the physical layer to realize
the synchronization of the frequency.
The Precision Time Protocol (PTP) clock complies with the IEEE 1588 v2 protocol. IEEE
1588 v2 is a synchronization protocol, which realizes time synchronization based on the
timestamp generated during the exchanging of protocol packets. It provides the nanosecond
accuracy to meet the requirements of 3G base stations.
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