Summary

Recommendation ITU-T Y.3121 specifies quality of service (QoS) requirements and framework for supporting deterministic communication services in a local area network (LAN). First, it presents the concept and benefits of deterministic communication services in a LAN consisting of heterogeneous network technologies. Then it specifies a high-level model and associated QoS requirements for inter-technology domain deterministic communication services in LAN. Based on the identified QoS requirements, it identifies a framework and an example operational procedure. Finally, it provides three scenarios and associated use cases as informal material in appendices.