###### Abstract
IP can be used as the NA to ensure compatibility with existing network infrastructure, enabling a smooth evolution of the network architecture. Our proposed solution is based on the latter ICN paradigm. To encourage users to actively contribute their idle bandwidth resources, this paper proposes the use of blockchain technology to build a bandwidth resource sharing marketplace. Blockchain is a distributed ledger technology that can transparently and securely record transactions in a tamper-poor manner. It is possible to securely account for the network contribution of users, and blockchain naturally carries payment and transaction characteristics, which can distribute token rewards to users. By designing blockchain incentive mechanisms, user behavior can be effectively changed. In different scenarios, there have been many works on incentive mechanisms based on blockchain [13; 14; 15]. This paper mainly presents a fusion architecture of the blockchain and ICN network and designs corresponding incentive mechanisms to encourage users to contribute their idle bandwidth to the ICN network. Since monetary mechanisms are the most direct and widely adopted way to incentivize users, this paper proposes an incentive model based on the PoNC blockchain consensus algorithm. Users can \"mine\" by forwarding messages and receive token rewards. In this paper, we propose the utilization of users' idle bandwidth resources in ICN through a blockchain-based incentive mechanism. Our goal is to leverage the characteristics of ICN to utilize user bandwidth resources and enhance network transmission scalability. To our best of knowledge, we are the first to propose an idle bandwidth aggregation and utilization method in an IP-compatible ICN architecture. Compared to existing solutions in the same scenario, it has more advantages, and further introduces blockchain technology to address incentive and trust issues. The main contributions of this paper are as follows:  
* We introduce the background knowledge of ICN and propose a fusion architecture of ICN and blockchain. Within this architecture, we present a scheme to utilize user bandwidth resources. We use User Bandwidth Sharing Service ID (UBSID) to identify a group of user nodes. These user nodes serve as backup nodes for transmission in ICN. They can replace ICN routing nodes or alleviate their load in specific situations. * To fully utilize user bandwidth resources, we propose a node selection strategy that takes into account different network states. This strategy aims to select the user nodes with the optimal network resource to assist in ICN packet forwarding. In order to incentivize user nodes to actively contribute their network bandwidth resources and prolong their online time, we design a consensus algorithm based on network contribution proof to incentivize user behavior. * We conducted a series of simulation experiments to validate the feasibility of our proposed scheme. The experimental results demonstrate significant improvements in ICN average network throughput and packet loss rate. Additionally, we compared our scheme with an application layer solution for network transmission. The experimental results indicate that our proposed scheme exhibits significant advantages in terms of end-to-end latency and bandwidth utilization. The remaining parts of this paper are organized as follows: In Section 2, we review relevant research on utilizing user bandwidth resources through solutions at the application layer and network layer. In Section 3, we introduce the background knowledge of ICN and propose a fusion architecture of ICN and blockchain. Within this architecture, we present a scheme to utilize user bandwidth resources. we further provide a detailed explanation of the node selection strategy based on NMRS and the incentive mechanism based on PoNC. Next, we conduct simulation experiments to evaluate the overall scheme and discuss the experimental results in Section 4. Finally, in Section 5, we summarize our research and provide an outlook on future work.