Almost _a quarter_ of the world-wide consumer Internet traffic is pushed through mobile networks! Wireless mobile network traffic requires tight time synchronization with wired components of the 5G/6G network. PTP with its sub-microsecond synchronization just doesnt cut it anymore and Michał Michalik and Arkadiusz Kubalewski say we need sub-nanosecond synchronization! The only way we can achieve this is to use Synchronous Ethernet (SyncE) which allows transport of clock signals through the Ethernet physical layer. This prevents the clock skew and clock jitter between adjacent network nodes.

In this talk, Michał and Arkadiusz will motivate us with the need of frequency synchronization and its role when coupled with PTP in 5G/6G networks. They will discuss the open-source project synce4l [0] and demonstrate, focusing mainly on the features, requirements (both in software and hardware), and configuration in a real network. Finally, the talk will describe how synce4l corresponds with the currently discussed new DPLL (Digital Phase Locked Loop) subsystem [1] in the Linux kernel and user-space networking community.

[0] https://github.com/intel/synce4l [1] https://lore.kernel.org/netdev/20230824213132.827338-1-vadim.fedorenko@linux...

cheers, jamal

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