Towards Trust-Aware and Energy-Efficient Symbiotic Blockchain Networks for 6G via Off-Chain Aggregation

Abstract

Symbiotic Communication improves spectrum efficiency and sustainability in 6G through cooperative resource exchange among heterogeneous devices. Its integration with blockchain enables Symbiotic Blockchain Networks (SBNs), which provide decentralized and immutable agreements for symbiotic services. However, these systems assume that off-chain wireless observations are correct. This assumption is unreliable in adversarial and noisy PHY-layer environments. This paper identifies a fundamental trust gap between off-chain observations and on-chain consensus. We adapt OCR-style off-chain aggregation to Symbiotic Blockchain Networks (SBNs) and analyze its role as a pre-consensus validation layer for noisy and adversarial wireless service observations. The contributions are threefold: (i) formulation of trust in symbiotic 6G systems as a decentralized aggregation problem under uncertain PHY observations; (ii) design of a selective anchoring mechanism that records only quorum-approved outcomes; and (iii) analytical and experimental evaluation indicating improved trust robustness while preserving scalability, latency, and energy efficiency. Our proposed approach provides a practical foundation for trustworthy symbiotic service exchange in large-scale 6G environments.