Event-Native Immersive Communication for 6G: From Multimodal Streams to Event Beliefs

2026-10-08

AI Summary

This study addresses the resource bottlenecks of high-dimensional multimodal transmission in 6G immersive communications and the inability of conventional metrics to reflect physical information preservation quality. We propose an event-native immersive communication framework that defines communication objects via physical events, characterizes transceiver states using event beliefs, and introduces Event Belief Deficiency (EBD) as a novel Quality-of-Experience metric, overcoming the insensitivity of traditional NMSE to physical discrepancies. Leveraging Gaussian event belief modeling and mode-separable transmission techniques, simulations demonstrate that, compared to MSE-oriented schemes, the proposed approach reduces the normalized log-det EBD by up to 63.6% and decreases the required average received signal-to-noise ratio by 3.47 dB, thereby significantly enhancing semantic transmission efficiency.

Abstract

The development of multimodal sensing capabilities is crucial for realizing immersive communications and enabling rich, natural remote interactions in future sixth-generation~(6G) communications. However, transmitting high-dimensional sensory streams places substantial pressure on wireless resources and leaves a fundamental question unresolved: what information about the underlying physical process should be preserved across wireless delivery? To address this issue, we establish an event-native immersive-communication framework in which a service-relevant physical event defines the communication object, while event beliefs represent the information available to transceiver agents before and after wireless delivery. Based on this event-native framework, we further propose event-belief deficiency (EBD) to evaluate quality of experience (QoE) in immersive communications, which differs from the conventional normalized mean-squared error (NMSE), as NMSE can be insensitive to physically distinct procedures whose stream distortions lie in a similar range. For Gaussian event beliefs with mode-separable delivery over Rayleigh fading, we derive the log-det EBD, its induced received signal-to-noise ratio (SNR) threshold, the exact outage probability, and the required transmit SNR. Simulation results with a physics-driven source show that stream NMSE can remain nearly unchanged across physically distinct event procedures, whereas log-det EBD reliably reflects their event-level uncertainty. Relative to a mean-squared-error (MSE)-oriented interface, event-native delivery reduces normalized log-det EBD by up to $63.6\%$ and lowers the required average received SNR by $3.47$~dB under the evaluated outage constraint, substantiating the effectiveness of the proposed framework.

Problem

• Immersive Communication
• 6G
• Multimodal Sensing
• Quality of Experience
• Event Beliefs

Innovation

• Event-Native Framework
• Event Beliefs
• Event-Belief Deficiency (EBD)
• Immersive Communication
• 6G