Blockchain based Data Sharing for User Experience Driven Slice SLA Guarantee

In 5G network, NWDAF (network data analysis function) carries out intelligent modeling based on user experience data and network parameters to support SLA (Service Level Agreement) guarantee. In order to ensure the generalization and long-term applicability of the AI (artificial intelligence) model, network slicing data sharing among multiple parties is needed to help build effective and comprehensive modeling data collection and improve the quality of AI modeling and SLA guarantee with advantage of lower network cost. Based on this, the paper proposes a solution of slice data sharing within the alliance based on blockchain for user experience-driven slice SLA guarantee. The network slicing related data required for NWDAF modeling is provided to and maintained in the blockchain by alliance members. This matches the relationship between 5G stakeholders and helps to improve the authenticity, integrity, privacy and quality of shared data, so as to support NWDAF to train AI model efficiently and accurately, and then improve SLA guarantee level of network slice. The paper also carries out experimental design and optimization direction analysis.