and are revolutionizing IoT systems. By processing data locally on devices, Edge AI reduces latency, improves privacy, and enables real-time decision-making. It's crucial for applications like and .
Federated learning allows collaborative model training across decentralized devices without sharing raw data. This preserves privacy, reduces communication overhead, and improves model performance by leveraging diverse data distributions from multiple devices.
Edge AI in IoT Systems
Concepts of edge AI and federated learning
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Edge AI processes and analyzes data locally on IoT devices (smart sensors) or edge servers (gateways) without relying on cloud communication
Reduces latency enables real-time decision making critical for applications (autonomous vehicles, industrial control systems)
Improves privacy by keeping sensitive data (medical records, financial information) on the device minimizing security risks
Optimizes bandwidth usage minimizes the amount of data transferred to the cloud conserving network resources
Increases reliability allows autonomous operation even with limited or intermittent internet connectivity (remote locations, emergency situations)
Federated learning enables collaborative model training across multiple decentralized devices (smartphones, IoT sensors) without sharing raw data
Preserves raw data remains on individual devices only model updates (gradients, parameters) are shared with a central server
Reduces communication overhead only model parameters are exchanged not the entire dataset making it scalable for large-scale deployments
Improves model performance by leveraging the collective knowledge and diverse data distributions of multiple devices (different user behaviors, environmental conditions)
Deployment of models on IoT devices
Model optimization techniques adapt machine learning models to resource-constrained IoT devices
Model compression reduces the size of the model while maintaining accuracy
Pruning removes less important weights or connections in the model
Quantization reduces the precision of model parameters (32-bit to 8-bit) to save memory and computation
Model distillation trains a smaller student model to mimic the behavior of a larger teacher model
Hardware-specific optimizations leverage device-specific instructions (ARM NEON) or accelerators (GPUs, TPUs) to speed up inference
Edge inference considerations ensure models perform efficiently on IoT devices
account for limited memory (kilobytes), storage (megabytes), and processing power (MHz) on IoT devices
Energy efficiency optimizes models and inference algorithms for low power consumption (milliwatts) to extend battery life
Latency requirements ensure real-time performance (milliseconds) for time-critical applications (industrial control, video analytics)
Deployment strategies include over-the-air updates, containerization (Docker), and versioning of models for seamless rollouts and management
Federated Learning in IoT Systems
Implementation of federated learning frameworks
(TFF) is an open-source framework developed by Google for federated learning
Provides a high-level API for defining federated computations and algorithms
Supports different federated learning architectures (FedAvg, FedProx) and optimization methods (SGD, Adam)
PySyft is a Python library for secure and private deep learning including federated learning capabilities
Offers a secure multi-party computation (MPC) framework for privacy-preserving model training and inference
Integrates with popular deep learning frameworks (PyTorch, TensorFlow) for easy adoption
LEAF is a benchmark framework for learning in federated settings
Provides a suite of datasets (FEMNIST, Shakespeare) and evaluation metrics (accuracy, communication cost) for federated learning research
Enables fair comparison and reproducibility of federated learning algorithms across different settings and assumptions
Federated learning process involves iterative rounds of local training, , and model update
Local training each device (client) trains the model on its local data for a few epochs
Model aggregation local model updates (gradients) are sent to a central server (coordinator) for aggregation wt+1=∑k=1Knnkwt+1k
Model update the aggregated model is distributed back to the devices for the next round of local training
Privacy-preserving techniques protect sensitive information during federated learning
Secure aggregation encrypts local model updates before sending them to the server preventing the server from accessing individual updates
adds noise (Laplacian, Gaussian) to the model updates to protect individual device data from being inferred
Homomorphic encryption enables computation (addition, multiplication) on encrypted data without decrypting it first
Centralized vs decentralized ML in IoT
Centralized machine learning relies on a central server (cloud) for model training and inference
Advantages
Easier to manage and update models since they are stored and served from a central location
Access to the entire dataset for training potentially leading to higher model accuracy and generalization
Disadvantages
Privacy concerns sensitive data (user behavior, personal information) is sent to a central server increasing the risk of data breaches and misuse
Communication overhead large amounts of data need to be transferred to the cloud consuming network bandwidth and incurring latency
Single point of failure the centralized server becomes a bottleneck and a potential point of failure disrupting the entire system if unavailable
Decentralized machine learning (federated learning) distributes model training and inference across multiple devices (edge, IoT)
Advantages
Improved privacy raw data remains on the devices only model updates are shared reducing the risk of and protecting user privacy
Reduced communication overhead only model parameters (kilobytes) are exchanged not the entire dataset (gigabytes) making it efficient for bandwidth-constrained networks
Increased robustness no single point of failure the system can continue to operate even if some devices are offline or disconnected
Disadvantages
Increased complexity coordinating model training across multiple devices with different capabilities (processing power, memory) and network conditions (latency, bandwidth) can be challenging
Potential for slower convergence model updates from devices may be delayed or asynchronous leading to slower convergence compared to centralized training
Model inconsistency devices may have different data distributions (user preferences, environmental factors) leading to varying model performance across devices and potential fairness issues