The paper proposes ConEx Lite to ease the deployment of congestion bitrate policing in existing 4G and WiFi mobile networks with initial objectives to improve end user experience and backhaul network performance and dimensioning. ConEx Lite is a congestion management solution working at the bearer or tunnel layer independent from UE terminals and Internet endpoints or other transport protocol (e.g. TCP) implementations. It consists of simple functions that can be implemented on existing radio access and core nodes without negatively impacting the performance of the mobile network. ConEx Lite provides faster response to congestion and allows mobile operators to control the congestion volume policies according to their radio access technology and/or service mix.

This memo describes an extension to the Two-Way Active Measurement Protocol (TWAMP). Specifically, it extends the TWAMP-Test protocol, which identifies and manages packet trains, in order to measure capacity metrics like the available path capacity, tight section capacity, and UDP delivery rate in the forward and reverse path directions.

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