Communication Efficient Federated Learning with Energy Awareness over Wireless Networks

• URL: http://arxiv.org/abs/2004.07351v3
• Date: Sun, 5 Sep 2021 23:58:44 GMT
• Title: Communication Efficient Federated Learning with Energy Awareness over Wireless Networks
• Authors: Richeng Jin, Xiaofan He and Huaiyu Dai
• Abstract summary: In federated learning (FL), the parameter server and the mobile devices share the training parameters over wireless links. We adopt the idea of SignSGD in which only the signs of the gradients are exchanged. Two optimization problems are formulated and solved, which optimize the learning performance. Considering that the data may be distributed across the mobile devices in a highly uneven fashion in FL, a sign-based algorithm is proposed.
• Score: 51.645564534597625
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: In federated learning (FL), reducing the communication overhead is one of the most critical challenges since the parameter server and the mobile devices share the training parameters over wireless links. With such consideration, we adopt the idea of SignSGD in which only the signs of the gradients are exchanged. Moreover, most of the existing works assume Channel State Information (CSI) available at both the mobile devices and the parameter server, and thus the mobile devices can adopt fixed transmission rates dictated by the channel capacity. In this work, only the parameter server side CSI is assumed, and channel capacity with outage is considered. In this case, an essential problem for the mobile devices is to select appropriate local processing and communication parameters (including the transmission rates) to achieve a desired balance between the overall learning performance and their energy consumption. Two optimization problems are formulated and solved, which optimize the learning performance given the energy consumption requirement, and vice versa. Furthermore, considering that the data may be distributed across the mobile devices in a highly uneven fashion in FL, a stochastic sign-based algorithm is proposed. Extensive simulations are performed to demonstrate the effectiveness of the proposed methods.

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