Introduction
The evolution of generative artificial intelligence (GAI) has brought significant advancements in AI-generated content across various fields. At the same time, edge intelligence (EI), propelled by future 6G network technologies, appears to be a game-changer in the world of distributed computational power. The intersection of these two domains presents a unique set of opportunities and challenges. This paper introduces the GAI-oriented synthetical network (GaisNet), a pioneering framework aiming to synergize GAI with EI in a collaborative cloud-edge-end intelligence architecture.
GaisNet: A Collaborative Framework
GaisNet is designed to bridge the gap between the centralized resource-heavy GAI models and the lightweight, flexible EI models situated closer to end-users. By employing a bidirectional knowledge flow mechanism, GaisNet enables efficient, fine-tuned model adjustments and improves the inference capabilities of GAI models. Edge servers play a pivotal role as knowledge relays in this process, handling both the domain-specific knowledge from client devices and the foundational knowledge from cloud-based GAI models.
The paper highlights that while GAI benefits from significant pre-training on large datasets, its growth is restricted due to data exhaustion and the monopolization by tech giants. On the other hand, EI, due to its proximity to users and vast data from IoT devices, faces limitations due to smaller model scales that lack prior knowledge. This is where GaisNet steps in, proposing an integrated cloud-edge-end approach to tap into the best of both worlds.
The Operations of GaisNet
GaisNet operates on a dual-level knowledge flow: the cloud-edge subnetworks and the edge-end subnetworks. The cloud-edge subnetworks are characterized by large-scale knowledge transfer focusing on generalized foundation knowledge, while edge-end subnetworks deal with small-scale, domain-specific knowledge transfer. The framework enables the edge server to function without actual data transfer, thus safeguarding user privacy and efficiently using localized knowledge.
The operational workflow of GaisNet includes stages such as model segmentation, data embedding, computing and transmission of tunable modules, and aggregation of enhanced models. With tunable parts of models efficiently distributed across the client clusters, GaisNet fosters simultaneous model fine-tuning and task inference while maintaining privacy and reduced communication overhead.
Experimental Results and Future Directions
Experiments conducted to validate GaisNet's effectiveness suggest the superiority of pre-trained models over non-pretrained ones in inference accuracy. Moreover, parameter-efficient fine-tuning demonstrates a significant performance with reduced computing resources compared to full parameter fine-tuning. The influence of non-IID (independent and identically distributed) and the number of client clusters partaking in fine-tuning reveal insights into the convergence accuracy of the model.
As we look forward, the paper underscores several future challenges, including privacy concerns with GAI use, the theoretical bounds of GAI's performance, considering resource constraints, and the development of incentive mechanisms for the participation of 6G end devices. These considerations are crucial in ensuring that as GaisNet and similar frameworks evolve, they do so with a balanced view of ethical usage, resource optimization, and fair incentive distribution.