SCMA based resource management of D2D communications for maximum sum-revenue

TL;DR

This paper proposes a blockchain-based, SCMA-assisted resource allocation scheme for D2D communications that maximizes cellular user revenue, utilizing a heuristic algorithm to solve an NP-hard optimization problem.

Contribution

It introduces a novel blockchain-enabled framework for secure resource sharing in D2D communications using SCMA and a semi-definite relaxation heuristic.

Findings

The proposed algorithm effectively maximizes cellular user revenue.

Blockchain integration enhances security in resource allocation.

Simulation results validate the algorithm's performance under various conditions.

Abstract

The device-to-device (D2D) communication is one of the promising technologies of the future Internet of Things (IoT), but its security-related issues remain challenging. The block-chain is considered to be a secure and reliable distributed ledger, so we can treat the device user equipment (D-UE) request for the reusing resources of cellular user equipment (C-UE) as a transaction and put it into a transaction pool, then package the record into the block-chain. In this paper, we study the D2D communication resource allocation scheme based on sparse code multiple access (SCMA). Firstly, the system's interference model and block-chain-based transaction flow are analyzed. Then we propose the optimization problem so that C-UE can get the maximum revenue by sharing its resources to D-UE. This problem is NP-hard, so we propose a heuristic algorithm based on semi-definite relaxation (SDR) programming to solve it. Finally, the performance of the proposed algorithm is verified by simulation of different system parameters.