Wireless local area network (WLAN) witnesses a very fast growth in the past 20 years by taking the maximum throughput as the key technical objective. However, the quality of experience (QoE) is the most important concern of wireless network users. In this article, we point out that poor QoE is the most challenging problem of the current WLAN, and further analyze the key technical problems that cause the poor QoE of WLAN, including fully distributed networking architecture, chaotic random access, awkward ``high capability'', coarse-grained QoS architecture, ubiquitous and complicated interference, ``no place'' for artificial intelligence (AI), and heavy burden of standard evolving. To the best of our knowledge, this is the first work to point out that poor QoE is the most challenging problem of the current WLAN, and the first work to systematically analyze the technical problems that cause the poor QoE of WLAN. We highly suggest that achieving high experiences (HEX) be the key objective of the next generation WLAN.

翻译：无线局域网（WLAN）在过去20年中以最大化吞吐量为关键技术目标，实现了非常快速的增长。然而，服务质量体验（QoE）是无线网络用户最为关注的问题。本文指出，低劣的QoE是当前WLAN面临的最具挑战性问题，并进一步分析了导致WLAN QoE低劣的关键技术问题，包括全分布式组网架构、混乱的随机接入、尴尬的“高能力”、粗粒度的QoS架构、普遍且复杂的干扰、人工智能（AI）的“无立足之地”以及标准演进的沉重负担。据我们所知，这是首次指出低劣QoE是当前WLAN最具挑战性问题的工作，也是首次系统性地分析导致WLAN QoE低劣的技术问题的工作。我们强烈建议，实现高体验（HEX）应成为下一代WLAN的关键目标。