Federated Learning (FL) is a rapidly growing field in machine learning that
allows data to be trained across multiple decentralized devices. The selection
of clients to participate in the training process is a critical factor for the
performance of the overall system. In this survey, we provide a comprehensive
overview of the state-of-the-art client selection techniques in FL, including
their strengths and limitations, as well as the challenges and open issues that
need to be addressed. We cover conventional selection techniques such as random
selection where all or partial random of clients is used for the trained. We
also cover performance-aware selections and as well as resource-aware
selections for resource-constrained networks and heterogeneous networks. We
also discuss the usage of client selection in model security enhancement.
Lastly, we discuss open issues and challenges related to clients selection in
dynamic constrained, and heterogeneous networks.

联邦学习是机器学习领域中迅速发展的领域，允许数据在多个分散设备上进行训练。客户端选择是整个系统性能的关键因素。本调查综述了联邦学习中最先进的客户端选择技术，包括它们的优点、局限性以及需解决的挑战和开放问题。我们涵盖了传统的选择技术，例如随机选择，其中选择所有或部分随机的客户端进行训练。我们还涵盖了面向性能和面向资源的选择，适用于资源受限和异构网络。我们还讨论了客户端选择在模型安全增强中的使用。最后，我们讨论了动态约束和异构网络中的客户端选择相关的开放问题和挑战。