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Client Selection in Federated Learning: Convergence Analysis and Power-of-Choice Selection Strategies

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arxiv 2010.01243 v1 pith:EYVOJMLB submitted 2020-10-03 cs.LG cs.DCstat.ML

Client Selection in Federated Learning: Convergence Analysis and Power-of-Choice Selection Strategies

classification cs.LG cs.DCstat.ML
keywords clientselectionconvergencefederateddatalearningpower-of-choicestrategies
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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abstract

Federated learning is a distributed optimization paradigm that enables a large number of resource-limited client nodes to cooperatively train a model without data sharing. Several works have analyzed the convergence of federated learning by accounting of data heterogeneity, communication and computation limitations, and partial client participation. However, they assume unbiased client participation, where clients are selected at random or in proportion of their data sizes. In this paper, we present the first convergence analysis of federated optimization for biased client selection strategies, and quantify how the selection bias affects convergence speed. We reveal that biasing client selection towards clients with higher local loss achieves faster error convergence. Using this insight, we propose Power-of-Choice, a communication- and computation-efficient client selection framework that can flexibly span the trade-off between convergence speed and solution bias. Our experiments demonstrate that Power-of-Choice strategies converge up to 3 $\times$ faster and give $10$% higher test accuracy than the baseline random selection.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. DIST-FL: Enhancing Security for TEE-based Aggregation in Federated Learning

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    DIST-FL distributes TEE-guarded servers into an append-only ledger to ensure linearizable FL aggregation and counter rollback plus I/O attacks while matching single-TEE speed.

  2. Delayed Momentum Aggregation: Communication-efficient Byzantine-robust Federated Learning with Partial Participation

    cs.LG 2025-09 conditional novelty 6.0

    D-Byz-SGDM aggregates cached momentum from non-sampled clients together with fresh momentum from sampled clients, preserving Byzantine robustness under partial participation and achieving an optimal O(cδζ²/p) stationa...

  3. FedSteer: Taming Extreme Gradient Staleness in Federated Learning with Corrective Projections and Caching

    cs.LG 2026-06 unverdicted novelty 5.0

    FedSteer constructs a gradient subspace from cached client updates, projects active gradients to obtain coordinates, and reuses those coordinates on the drifted subspace to correct extreme staleness in federated learning.

  4. Choose Wisely and Privately: Proactive Client Selection for Fair and Efficient Federated Learning

    cs.LG 2026-05 unverdicted novelty 5.0

    Proposes proactive client selection via differentially private mutual information and Potential Federation Loss optimized by simulated annealing to achieve faster, fairer, and more accurate federated models than unifo...

  5. Choose Wisely and Privately: Proactive Client Selection for Fair and Efficient Federated Learning

    cs.LG 2026-05 unverdicted novelty 5.0

    Proactive client selection in federated learning via differentially private mutual information and simulated annealing to optimize Potential Federation Loss for utility and fairness.

  6. Optimizing Split Federated Learning with Unstable Client Participation

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  7. Green Federated Learning via Carbon-Aware Client and Time Slot Scheduling

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    A carbon-aware federated learning scheduler that adds slack time, fair client selection, and fine-tuning beats a full-participation baseline on MNIST under tight carbon budgets.