D2D Service Provisioning Mechanism for Content Sharing

With the rapid development of mobile internet, mobile data traffic has increased substantially, and multimedia services have gradually occupied a large proportion of mobile network traffic. Using the Device-to-Device (D2D) technique for multimedia content sharing is considered as an effective solution to address large-scale user requests. D2D communication technology refers to direct data transmission between two adjacent users by reusing the spectrum resources of cellular users, effectively improving system throughput and spectrum resource utilization. Currently, most literature on D2D content sharing focuses on cache strategy research, while neglecting the design of reasonable content sharing mechanism. This paper focuses on the D2D service supply problem in content sharing scenarios and designs a stable sharing strategy by jointly considering power control and spectrum allocation. The power control and spectrum allocation problems for D2D users and cellular users are modeled as a minimum cost flow problem in graph theory and solved using the minimum cost flow algorithm. To ensure the stability of the content sharing system, a stable matching algorithm based on the delay acceptance algorithm is proposed for requesters and providers, considering preference factors. A series of experiments show that the proposed algorithm has good fairness and execution efficiency.