A Guaranteed QoE Provision using Software Defined Networking and Cryptocurrency <Abstract> With remarkable research and development efforts, mobile wireless networks are entering the 5G era. In the post-5G era, the emergence of high-quality services (VR/AR, 4K/8K video streaming, etc.) is expected to lead to more diverse user requirements for network resources. To satisfy such User Experience (UX), it is essential to provide a highly granular Quality of Experience (QoE) while having a reasonable payment method such as pay-as-you-go. This paper proposes a system that achieves per-flow QoE provisioning with micropayment using two advanced technologies (i.e., Software Defined Networking (SDN) and the distributed ledger IOTA). We have implemented and evaluated the proposed system on the network emulator Mininet-WiFi. The evaluation results show that the system can provide guaranteed QoE for VoIP and video streaming applications following a micropayment |