Wi-Fi Cellular Convergence

Seamlessly transition between 4G/5G and Wi-Fi for a better user experience.

A smartphone’s user experience is impacted by:

  • Edge-of-network problems →  the phone can stick to a poor wi-fi network
  • Handovers between cellular and Wi-Fi →  app sessions can stall

→ The user disables Wi-Fi, and then remains on cellular sometimes for hours.

Seamless Overlapping Handover enables 4G/5G traffic to transition to/from Wi-Fi without disturbing the user experience.

To achieve this, in 2020 the 3GPP defined the ATSSS feature (Access Traffic Steering Switching & Splitting), based on MPTCP technology, comprising software on the handset and in the network.

MPTCP has been used in Apple handsets since 2013 and Samsung handsets since 2015.

Tessares Enables Seamless Overlapping Handover

Tessares 'Overlay' ATSSS enables the deployment of Seamless Overlapping Handover today.

Tessares Overlay ATSSS combines Wi-Fi with 4G / 5G



A smartphone handset is one component of our solution.

ATSSS is implemented in the OS of the smartphone by the smartphone manufacturer. 

ATSSS Network Node

Hybrid Access Gateway

ATSSS is deployed via a Hybrid Access Gateway.

ATSSS Network Node

Important notes