Open Broadband-UDP Speed Test (OB-UDPST)
The OB-UDPST (Open Broadband - User Datagram Protocol Speed Test) project is an open source implementation of a tool to perform the metrics defined in TR-471 IP Layer Capacity Metrics and Measurement. The OB-UDPST project provides detailed IP capacity performance measurements and can serve as an important element in a service provider’s QoE measurement framework.
Attributes include:
Normalization of measurements across different network protocols, access technologies, and vendor products
Precise and direct control of load traffic as well as the response to congestion indications
Direct visibility to network impairments (latency, loss, etc.) while testing
Measurements that are not disproportionately influenced by RTT (Round-Trip Time) and packet loss
Less kernel overhead and higher-density test servers
Customization of test behavior for specific services or environments (i.e., transmission aggressiveness, congestion sensitivity, max test duration,…)
Simpler client development and enhancement rollouts (due to server-centric rate control)
Test & turn-up and post-repair soak testing via static sending rates (e.g., 90% of max)
Frequent or long-duration impairment and reliability checks via low-rate testing (e.g., 100 Kbps)
Watch this webinar to learn more Service Differentiation and App Provider Relationships vBASe webinar recording (youtube.com)
November 2025 Demonstration - A demonstration of how OB-UDPST JSON test data is loaded into a time-series database for processing and near real-time visualization.
Broadband Forum's Open Broadband initiative brings open source and open standards together, paving the way to dramatically change our industry and bring the full promise of broadband to fruition.
Visit the OB UDP Speed Test Home
Join the project:
Sign the Participation Agreement and submit via email attachment to Craig Thomas, Broadband Forum CEO, at info [at] broadband-forum [dot] org: