Executive Summary :
Ethernet-based technologies have dominated the market for support of multiple data services with various rates and types of networks (Enterprise, MAN, Core), and Ethernet has become a de-facto data transmission standard. The installed base of Ethernet networks is larger than any other alternative technology deployment, largely due to simplicity of the Ethernet standards and the cost-efficiency of equipment.
Although attractive for a variety of reasons, the features of traditional Ethernet and its derivatives are not always in line with current users requirements:
Native Ethernet OA&M (Operation, Administration and Maintenance) capabilities are limited.
Even with the latest improvements, the restoration time of native Ethernet networks tends towards seconds instead of required milliseconds.
This situation led to development various flavors of Ethernet standards, and most importantly, adaptation of SONET/SDH and other transport techniques as carriers for Ethernet frames. The goal to using these carriers for Ethernet transport is to mitigate Ethernet shortcomings by bringing its features closer to those of carrier-grade technologies.
The telecommunications industry is experiencing a quantum leap in transport technologies, preparing it to move from SONET/SDH infrastructure to all optical networks. There were opinions in the industry that SONET/SDH technology may not survive such an evolution. The industry trends show that Ethernet is being deployed at growing rate, but SONET/SDH research deserves more attention. This situation produced a number of questions; such as whether Ethernet development can now influence further SONET/SDH industry progress, or alternative ways to transport Ethernet frames will result in even more erosion on SONET/SDH.
The proliferation of transport networks based on SONET makes it logical to assess possible Ethernet-SONET symbiosis: Ethernet for data transmission and SONET as an Ethernet carrier. This Report analyzes technical and marketing aspects of the dependency between these two drivers within the telecommunications industry.
Included is an analysis of the industrys position on the relationship between Ethernet and SONET/SDH, feedback nature of their development, as well as the role of the alternative solutions in Ethernet transport. A multitude of factors influence Ethernet SONET/SDH relationship, many of which are addressed in this Report.
Emphasized are technological development issues in the relationship between Ethernet and SONET, as well as other transport technologies. Market forecasting will be addressed in an upcoming issue.
The primary conclusion is that SONET-based transport methods are developing together with alternative ways to transport Ethernet signals. At the present time, SONET is leading the market for Ethernet transport. The feedback nature of SONET Ethernet relationship exists as an industry trend, i.e., Ethernet proliferation calls for further SONET R&D and implementation. Ethernet has become a driver to develop and implement SONET features that make this technology adaptive to not only to voice but to data transmission as well.
Table of Contents
1.1 Traditional Ethernet
1.2 Fast Ethernet
1.3 Gigabit Ethernet
1.4 10 Gb/s Ethernet
2.0 ETHERNET STANDARDS AND GROWTH OF MARKET
2.1 Standards Development
3.1 Framing and rates
3.2 SONET Success and "Demise"
3.2.1 SONET and IP
3.2.2 Ethernet Over SONET and Optical Transport Network
4.0 WHY ETHERNET NEEDS A RIDE
5.0 SONET AS ETHERNET CARRIER
5.1 Next Generation SONET
5.2 10GE over SONET
5.3 Fast Ethernet and GE over SONET
5.3.1 Legacy Method
5.4 VC Principles
5.4.1 Virtual Concatenation and Support Methods
220.127.116.11 The GFP Element
18.104.22.168 Link Access Procedure SDH
22.214.171.124 Link Capacity Adjustment Scheme
126.96.36.199 Generalized Multiprotocol Label Switching
5.5 Packet Over SONET
5.5 Classification of the EoS Transport Methods
6.0 ALTERNATIVE TECHNOLOGIES
6.1 Resilient Packet Ring
6.1.1 MPLS and RPR Work Together
188.8.131.52 RPR and VC Methods
184.108.40.206 RPR and Ethernet
220.127.116.11 Hybrid Schemes Features
6.2 Ethernet/IP in OTN Environment
6.3 Dark Fiber
6.4 Ethernet in Wave Mutiplexing Environment
6.5 "SONET-like" Ethernet
6.6 Ethernet over Very High-Bit Rate Digital Subscriber Loop (EoV)
6.7 Wireless Ethernet (WE)
6.8 Switched Ethernet
6.8.1 Adding MPLS
7.0 Methods Comparison
8.0 TOPOLOGICAL EXAMPLES
8.1 Hub Aggregation (HA)
8.3 "GodBox" Topology (GT)
8.4 The "Intelligent Wire"
9.0 TRANSPORT METHODS TECHNICAL-ECONOMICAL COMPARISON: EXAMPLES
9.1 Criteria for Comparison
9.1.1 Quality of Service
9.1.7 Cost Considerations
18.104.22.168 Equipment Component Cost
22.214.171.124 Management Component Cost
126.96.36.199 Deployment Cost Component
188.8.131.52 Bandwidth Utilization Cost Component
184.108.40.206 Integration Cost
10.0 VENDORS COMMUNITY POSITION
10.1 Chip Vendors
10.1.1 Market Snapshot
10.2 Platform Vendors
10.2.1 Chips and Platforms
11.0 SERVICE PROVIDERS POSITION
12.0 ETHERNET TRANSPORT METHODS: CLASSIFICATION AND COMPARISON
13.0 FINDINGS AND CONCLUSIONS