Fast FEC synchronization for 10G Ethernet receiver

摘要

The synchronization duration is longer in 10G Ethernet application compare with previous ones due to higher performance and reliability requirement. In worse case, a 2112-bit FEC block in 10G/40G/100G Ethernet applications needs around 9 million bit cycles to achieve synchronized status. This paper introduces a faster method to synchronize the FEC block. Add a smart shift to drop less frame bits and re-use FEC decoder components can help to reduce the synchronization time to 26% compare with traditional way.