This paper looks at the evolution of the Licensed Shared Access (LSA) – a pioneering European scheme for tapping into radio spectrum that remains assigned to incumbent users. Using the theoretical framework of Co-evolutionary Development, we build analytical case study to understand why this crucial innovation did not take hold in the European wireless market, despite a decade of regulatory and standardisation efforts. Drawing on literature analysis and expert knowledge, we identify barriers that contributed to the stalling of LSA deployment and co-evolutionary forces that could help alleviating them. We expose the need for more proactive engagement of European regional policymakers and suggest directions for refocusing future LSA regulatory activities to target an expanded set of frequency bands, as well as broadening their scope to include local non-public networks and industry verticals.

本文着眼于许可共享接入 (LSA) 的演变——这是一种开创性的欧洲计划，用于利用仍分配给现有用户的无线电频谱。使用协同进化发展的理论框架，我们构建了分析案例研究，以了解为什么尽管经过了十年的监管和标准化努力，这一关键创新并未在欧洲无线市场占据一席之地。利用文献分析和专家知识，我们确定了导致 LSA 部署停滞的障碍以及有助于缓解这些障碍的共同进化力量。我们揭示了欧洲区域政策制定者更积极参与的必要性，并提出了重新聚焦未来 LSA 监管活动以针对更多频段的方向，