Support for a Wide Range of Service Needs10G-EPON SystemNTT Access Network Service Systems Laboratories

The 10G-EPON system can reduce CAPEX/OPEX through effective use of existing equipment, multiple branching, and large capacity.
This is a 10G-class access system that provides a multi-access service infrastructure, achieving higher bandwidth, higher reliability, and new functionality (time synchronization functions, sleep functions). It is expected to increase revenue by expanding its application to cover B2B2X services.

Currently, GE-PON services capable of 1 Gbps are in widespread use in the market. Meeting the needs for future expansion of transmission rates requires practical application of WDM/TDM access technology featuring a transmission rate of 10 Gbps per wavelength.

• This access system has maximum access speeds of 10 Gbit/s.
• Even with 64 users connected to a single PON system, allocated speeds per user are exceed around 100 Mbit/s (when allocated fairly).
• This system is economical, given that the increased device accommodation density means that this system can be shared by up to 4,096 customers with 64 ports per device and 64 branches per PON.
• This reduces OPEX costs through power- and space-saving features.
• Various IF packages are redundant, thereby achieving high reliability.
• It is compliant with IEEE802.3-2012, enabling future multi-vendor connectivity.
• With on-board time synchronization and frequency synchronization functions, this can be used for business situations such as mobile accommodation.
• This can accommodate not only 10G-ONU, but existing GE-ONU.

• High-speed data communication service

1. PON technology
A single-core optical fiber can be shared by customers at up to 64 locations. Each customer can communicate at a peak speed of 10 Gbit/s when the network is clear, and at a preconfigured, guaranteed speed even during congestion.

2. Optical wavelength multiplexing technology
This enables two-wave multiplex transmission on a single-core optical fiber. Different optical wavelengths are used for uplink and downlink data communications. In addition, the specification makes it easy to add a 1.55 μm wavelength band for video transmission in order to support video distribution services. Data communication and video distribution can be provided simultaneously without any mutual influence.

3. Fine-grained traffic control technology
Minimum guaranteed bandwidth, maximum available bandwidth, and delay class settings enable control of bandwidth and delay time required by each user and service. This provides fine-grained service design and service provision.

4. Priority control technologies
VLAN priority values on Ethernet frames allow prioritization of traffic by service for each user. Specifically, for customers using voice, video, and browsing the Internet at the same time, the voice data which requires low latency can be transferred first, followed by the video data. The remaining bandwidth can be used on a best-effort basis for data transfer for when browsing the Internet.

5. Redundancy technology
With N:1 redundancy, one spare package is prepared for every N PON package, and this enables immediate recovery in the event of PON package failure.

6. Time and frequency synchronization technologies
This can provide high value-added services with high-precision time synchronization functionality compliant with IEEE1588 and SyncE.

7. Dual rate technology
Dual-rate technology allows coexistence and accommodation of 1G and 10G.

NTT Access Network Service Systems Laboratories - Optical Access Infrastructure Project