Performance and practicality of using PTP over 5G systems with dedicated time synchronization support for media production
Date & Time
Tuesday, October 25, 2022, 12:15 PM - 12:45 PM
The 5G systems are becoming increasingly multi-purpose wireless networks, with several industry verticals already using 5G networking technology for their purposes. 3GPP has defined a set of dedicated features relevant to one or more such verticals. These new features make 5G more suitable for different media production scenarios, such as remote production or mobile studio scenarios, extending the local OB Van facilities and replacing the traditional RF cameras. 5G systems support bi-directional communication, using Time Division Duplex (TDD) or Frequency Division Duplex (FDD). The 5G radio network can simultaneously share the available spectrum with many devices by scheduling small radio resource units. However, some of these 5G systems concepts can become tricky for high-performance media over IP due to inherited jitter, throughput variations, and path asymmetries. As a result, the time synchronization between media sources can be challenging in 5G environments due to varying latencies of the radio transmissions. The paper will explore the practicalities of using IEEE 1588, Precision Time Protocol over 5G systems leveraging specific features included in the 3GPP Releases 16 and 17. They enable time transfer and synchronization support and allow media nodes to be synchronized to a common reference clock over the 5G network. The paper will explain the technical details of the 5G time synchronization enablers and describe both an open-sourced test setup and the measurement method developed for testing. In conclusion, the paper will analyze the measurement results from lab experiments.
Take-Aways from this Presentation
5G is becoming available and is applicable for media production, including time transfer for synchronization. The audience will learn about its use for high precision synchronization using specific 3GPP capabilities that are part of the 5G suite of specifications.