I. Introduction
The trend of economic globalization has provided the trade in global cross-border goods and services with unprecedented opportunities [1]. It has also brought a new demand for full-time and global services in cloud computing, which is explosive, global, and diverse. However, the new resource needs cannot be satisfied by a traditional single cloud service provider’s (CSP) service capability. To solve this problem, we proposed JointCloud in a former work [2]. JointCloud is part of a new generation of cloud computing modes, which borrows ideas from airline alliances, aimed at empowering the cooperation among multiple CSPs to provide cross-cloud services.