This document reports the up-to-date progress towards achieving smart E2E network slicing. It focuses on the preliminary design and prototyping of enabling technologies for E2E network slicing across network segments. Moreover, it provides initial investigations into the algorithm design of AI-based radio link control and RAN slice scheduler, as well as integration aspects of Management-Orchestration and Cognitive Plane development kit. Together, these enablers form basic building blocks for deeper integrations, technologically and algorithmically, between partners in future implementation of the targeting E2E slicing system.