E2E-QoE based 6G Sustainability: Challenges and Designing Aspects

As 6G mobile services will become more immersive and user customized, users will pay more attention to their subjective experience. Energy efficiency and sustainability is also one of the foremost goals in 6G system design. However, traditional network or terminal optimization based on key performance indicator or key quality indicator is difficult to accurately reflect the subjective experience of users and may be superfluous in terms of energy consumption. Then, how to reduce the energy consumption without compromising user experience to ensure sustainability is a topic worthy of studying. In this paper, we propose a novel concept of end-to-end quality of experience (E2E-QoE) based collaborative optimization, and elaborate the challenges and designing aspects of implementing such a practical framework. In order to present a potential solution to ensure the above E2E-QoE based collaborative optimization, an E2E-QoE model is developed, which can provide uniform criterion for cross-layer optimization among over-the-top services, terminals, networks, etc. Further, we apply 5G real data into several use cases to verify the effectiveness and feasibility of the proposed framework.