The Optical Networking and Communication
Conference & Exhibition

San Diego Convention Center,
San Diego, California, USA

Converged 5G and Heterogeneous Services Access Networks: How to Achieve Ultra-low Latency and High Reliability?


Thomas Pfeiffer, Nokia Bella Labs, Germany; Junichi Kani, NTT Access Service Systems, Japan; Elaine Wong, University of Melbourne, Australia


Ultra-low latency transmission is increasingly gaining importance in access networks, be it for low layer split fronthaul in 5G wireless networks, or for latency-sensitive and mission-critical applications over wireless or fixed connections. Emerging cMTC, mMTC, human-to-X services in the industrial and private environment, or public IoT applications such as V2X communication, are calling for deterministic and reliable low-latency communication. With data transmitted over complex networks, passing through multiple nodes and crossing different network segments based on diverse transmission technologies (fiber, copper, wireless) and architectures (ptmp, ptp on fiber or via mmWave, etc.), the latency, reliability and timing requirements imposed by the applications will be hard to meet. The workshop shall provide insight into the related challenges, and point out how and to which extent they can be addressed by system technologies (TDM-PON, WDM-PON, switched and meshed Ethernet, ptp fibers) as well as across network segments employing different technologies such as fixed-wireless.

Key questions this workshop intends to explore include:

  • Where do hard constraints such as 1 ms latency, 6 nines reliability and 5 or 10 ns timing accuracy come from, and how necessary is it to adhere to these constraints?
  • What are the new access architecture and protocol design for strict latency and high reliability guarantees?
  • Do we need new network node architectures in support of edge and fog computing and how invasive (i.e. how close to the end user) should these computing resources be?
  • How far can an orchestration layer help timely coordinate scheduling across segments, and when is hardware coordination needed?
  • Can/should mission-critical applications co-exist with other less latency-intensive types of applications?

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