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In traditional synchronous federated learning, all participants must update the model synchronously, which may result in a decrease in the overall model update frequency due to lagging participants. In order to solve this problem, asynchronous federated learning introduces an asynchronous aggregation mechanism, allowing participants to update models at their own time and rate, and then aggregate each updated edge model on the cloud, thus speeding up the training process. However, under the asynchronous aggregation mechanism, federated learning faces new challenges such as convergence difficulties and unfair model accuracy. This paper first proposes a fairness-based asynchronous federated learning mechanism, which reduces the adverse effects of device and data heterogeneity on the convergence process by using outdatedness and interference-aware weight aggregation, and promotes model personalization and fairness through an early exit mechanism. Mathematical analysis derives the upper bound of convergence speed and the necessary conditions for hyperparameters. Experimental results demonstrate the advantages of the proposed method compared to baseline algorithms, indicating the effectiveness of the proposed method in promoting convergence speed and fairness in federated learning.<\/jats:p>","DOI":"10.1186\/s13677-023-00535-2","type":"journal-article","created":{"date-parts":[[2023,11,9]],"date-time":"2023-11-09T08:30:48Z","timestamp":1699518648000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["FedEem: a fairness-based asynchronous federated learning mechanism"],"prefix":"10.1186","volume":"12","author":[{"given":"Wei","family":"Gu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yifan","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2023,11,9]]},"reference":[{"issue":"4","key":"535_CR1","doi-asserted-by":"publisher","first-page":"1520","DOI":"10.1007\/s11036-022-01978-8","volume":"27","author":"B Gong","year":"2022","unstructured":"Gong B, Xing T, Liu Z, Wang J, Liu X (2022) Adaptive clustered federated learning for heterogeneous data in edge computing. 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