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10G EPON is a point-to-multipoint passive optical network access technology standardized in IEEE 802.3av, which evolved from the EPON standard IEEE 802.3ah. There are two key points in the IEEE 802.3av standard: the uplink and downlink bandwidths specified in IEEE 802.3ah are raised up to 10 Gbit/s; 10G EPON has good compatibility so that 10G EPON ONUs can coexist with EPON ONUs in an ODN. In this way, the operator’s investment is protected.
Advantages of 10G EPON application:
Compatibility: 10G EPON is in the same standard system as EPON.
Accordingly, EPON, non-symmetric 10G EPON, and symmetric 10G EPON ONUs can be connected to an OLT via the same ODN. The service model of 10G EPON is the same as that of EPON, and is compatible with the existing network management system, using a uniform OAM mechanism.
High bandwidth: 10G EPON supports the symmetric rate mode (10 Gbit/s in both uplink and downlink directions) and the non-symmetric rate mode (1.25 Gbit/s in the uplink direction and 10 Gbit/s in the downlink direction). The transmission rates are raised by 10 times compared with that of 1G EPON, and the transmission efficiency is enhanced to 97%.
High split ratio: Provides a split ratio up to 1:128.
Flexible networking: Users can choose to use EPON ONUs, symmetric 10G EPON ONUs, or non-symmetric 10G EPON ONUs according to their demand for bandwidth. The system can be upgraded on demand. The network is simple and can be configured flexibly. Ultra-long-haul access with a high split ratio is supported.
Cost-effective: The transfer cost per bit is reduced, and the cost of the upgrade is low.
Smooth upgrade: 10G EPON service cards can replace EPON service cards with little change in configurations. Accordingly, services can be migrated smoothly.
Software and hardware compatibility: Bandwidth can be upgraded without replacing subracks. Various PON service cards can coexist in a subrack.
Clock and time synchronization with high precision: Uses the system time transfer protocol defined in IEEE 802.1as, and supports synchronous Ethernet (SyncE), IEEE1588 V2, and 1PPS+ToD.
Overall protection: Supports backbone fiber protection (Type B) and all-fiber protection (Type C). The switching time is no more than 50 ms.
|Standard compliance||Supports the 10G EPON functions defined in IEEE 802.3av.|
|Transmission rate||In the symmetric mode:
Uplink: 10 Gbit/s
Downlink: 10 Gbit/s
In the asymmetric mode:
Uplink: 1.25 Gbit/s
Downlink: 10 Gbit/s
|Wavelength||In the symmetric mode: u Uplink: 1260 nm to 1280 nm u Downlink: 1575 nm to 1580 nm In the asymmetric mode:
Uplink: 1260 nm to 1360 nm
Downlink: 1575 nm to 1580 nm
|Maximum transmission distance||60 km|
|Maximum differential fiber distance||60 km|
|Maximum split ratio||1:128|
|Detection of optical power||Supports RSSI detection.|
|Detection of rogue ONUs||Supports automatic detection and location of ONUs that constantly emit light.|
|Compatibility||Supports various kinds of ONUs, such as SBU, SFU, MTU, cassette MDU, and MDU which can accommodate cards.|
|DBA function||Supports three bandwidth types: fixed bandwidth, assured bandwidth, and maximum bandwidth.|
|Supports the dynamic bandwidth allocation (DBA) algorithm.|
|Reliability||Supports Type B, Type C, and Type C dual-homing protections.|
|Throughput||In the 10G/1G asymmetric access mode, if 10G/1G EPON ONUs are connected only, the downlink throughput is no less than 8.3 Gbit/s, and the uplink throughput is no less than 900 Mbit/s.|
|In the 10G/10G symmetric access mode, if 10G/10G EPON ONUs are connected only, the downlink throughput is no less than 8.3 Gbit/s, and the uplink throughput is no less than 8 Gbit/s.|
|Transmission delay||When the split ratio is 1:32, the uplink average transmission delay (when the traffic is no more than 90% of the PON port throughput) is less than 1.5 ms.|
|The downlink average transmission delay (when the traffic is no more than 90% of the PON port throughput) is less than 1 ms.|