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arXiv 1208.0144cs.GTcs.DS
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无线网络中异构频谱分配的真实拍卖机制

Truthful Auction Mechanism for Heterogeneous Spectrum Allocation in Wireless Networks

He Huang, Yu-e Sun, Xiang-yang Li, Hongli Xu, Yousong Zhou, Liusheng Huang

摘要:

二次频谱拍卖被广泛应用于无线网络中,以缓解频谱稀缺。在现实的频谱交易市场中,来自次用户的请求通常指定在某个地理区域中使用固定频谱频带,并且要求在固定的可用时间间隔中的持续时间。考虑到次用户的自私行为,必须设计一个真实的拍卖,以最佳匹配的可用频谱和次用户的请求。遗憾的是,现有的设计要么没有考虑频谱异构性,要么忽略了次级用户之间所需时间的差异。本文针对这一问题,研究了如何利用拍卖机制对频谱资源进行分配和定价,使社会效益最大化。我们首先将二级用户的频谱和请求分类到不同的本地市场,以确保本地市场之间没有干扰,然后我们可以专注于单个本地市场的拍卖。我们首先设计了一个基于Vickrey-Clarke-Groves(VCG)机制的最优拍卖,在保证真实性的同时最大化社会效率。为了降低计算复杂性,我们进一步提出了一个真实的次优拍卖多项式时间复杂度,它产生一个近似因子6+4 \surd 2。我们使用真实频谱可用性数据进行的大量仿真结果表明,次优拍卖的社会效率比始终高于最优拍卖的70%。

英文摘要:

Secondary spectrum auction is widely applied in wireless networks for mitigating the spectrum scarcity. In a realistic spectrum trading market, the requests from secondary users often specify the usage of a fixed spectrum frequency band in a certain geographical region and require a duration time in a fixed available time interval. Considering the selfish behaviors of secondary users, it is imperative to design a truthful auction which matches the available spectrums and requests of secondary users optimally. Unfortunately, existing designs either do not consider spectrum heterogeneity or ignore the differences of required time among secondary users. In this paper, we address this problem by investigating how to use auction mechanisms to allocate and price spectrum resources so that the social efficiency can be maximized. We begin by classifying the spectrums and requests from secondary users into different local markets which ensures there is no interference between local markets, and then we can focus on the auction in a single local market. We first design an optimal auction based on the Vickrey-Clarke-Groves (VCG) mechanism to maximize the social efficiency while enforcing truthfulness. To reduce the computational complexity, we further propose a truthful sub-optimal auction with polynomial time complexity, which yields an approximation factor 6+4\surd2. Our extensive simulation results using real spectrum availability data show that the social efficiency ratio of the sub-optimal auction is always above 70% compared with the optimal auction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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