BCC-SRN: Blockchain-Based Cooperative Communication Scheme for Symbiotic Radio Network

The symbiotic radio network (SRN) plays a crucial role in green communication solutions by facilitating cooperative communication between devices of primary and secondary links, leading to enhanced transmission quality and optimized resource efficiency. For the joint demodulation of primary and secondary signals, the multiparty trust is essential for operators with different interests. Building multiparty trust in a decentralized manner is challenging for the implementation of the SRN. As an emerging distributed ledger technology, blockchain provides multiparty trust between unreliable devices to share data and resources cooperatively. This paper proposes a consortium Blockchain-based Cooperative Communication scheme for SRN (BCC-SRN), where Hyperledger Fabric is used as the trust anchor with better security, higher throughput, and more flexible organization. In particular, a credit-based incentive mechanism is established to encourage different parties to behave according to the negotiated contracts. The credit is recorded by smart contracts and adjusted based on the contribution of the corresponding cooperators. Simulation results prove that the proposed BCC-SRN is highly effective in improving cooperation security and transmission quality.