Prioritizing Modalities: Flexible Importance Scheduling in Federated Multimodal Learning

• URL: http://arxiv.org/abs/2408.06549v1
• Date: Tue, 13 Aug 2024 01:14:27 GMT
• Title: Prioritizing Modalities: Flexible Importance Scheduling in Federated Multimodal Learning
• Authors: Jieming Bian, Lei Wang, Jie Xu,
• Abstract summary: Federated Learning (FL) is a distributed machine learning approach that enables devices to collaboratively train models without sharing their local data. Applying FL to real-world data presents challenges, particularly as most existing FL research focuses on unimodal data. We propose FlexMod, a novel approach to enhance computational efficiency in MFL by adaptively allocating training resources for each modality encoder.
• Score: 5.421492821020181
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Federated Learning (FL) is a distributed machine learning approach that enables devices to collaboratively train models without sharing their local data, ensuring user privacy and scalability. However, applying FL to real-world data presents challenges, particularly as most existing FL research focuses on unimodal data. Multimodal Federated Learning (MFL) has emerged to address these challenges, leveraging modality-specific encoder models to process diverse datasets. Current MFL methods often uniformly allocate computational frequencies across all modalities, which is inefficient for IoT devices with limited resources. In this paper, we propose FlexMod, a novel approach to enhance computational efficiency in MFL by adaptively allocating training resources for each modality encoder based on their importance and training requirements. We employ prototype learning to assess the quality of modality encoders, use Shapley values to quantify the importance of each modality, and adopt the Deep Deterministic Policy Gradient (DDPG) method from deep reinforcement learning to optimize the allocation of training resources. Our method prioritizes critical modalities, optimizing model performance and resource utilization. Experimental results on three real-world datasets demonstrate that our proposed method significantly improves the performance of MFL models.

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