Self-organized Dynamic Caching Space Sharing in Virtualized Wireless Networks

Both virtualization and content caching are promising techniques for the future 5G wireless networks. Meanwhile, self-organized based resource management is one fundamental capability enabling the wireless networking more flexible and efficient. In this work, we focus on the virtualized wireless networks deployed by a common wireless network operator (WNO), where the caching spaces of heterogenous BSs (macrocell BSs and small cell BSs) are dynamically shared by multiple self-organized service operators (SPs) to perform content pre-caching and provide users better services. Particularly, by well considering the strategic interactions among the WNO and SPs, we formulate this problem as a double auction game, where the WNO and SPs are the seller and bidders, respectively. In contrast to the traditional double auction based formulation, each bidder is permitted to bid multiple goods here. To address this, the concept of virtual SP is incorporated and a multi-round based auction algorithm has been developed. Then, the key economic properties, i.e., individual rationality, budget balance and truthfulness, of our proposed algorithm are also established. Finally, simulation results verify the effectiveness of our proposed algorithm in terms of both the SP's revenue and user's satisfaction.