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With the tremendous increase in the amount of network contents and emerging applications, traditional network architecture starts to exhibit management and efficiency problems. The evolving STIN, as a combination of satellite networks and terrestrial networks, also faces similar obstacles. To address this challenge, technologies like ICN and SDN, which were initially proposed for terrestrial networks, could provide viable and promising solutions in STIN. In this article, we propose a novel architecture to provide flexible management and efficient content retrieval for STIN. Our architecture consists of a three-layer satellite network in which satellites of each layer are assigned to different functionalities. In order to achieve compatibility with ICN, we also design a new on-board switch based on protocol oblivious forwarding switch. In so doing, the proposed architecture inherits the advantages of ICN and SDN …