异质次级频谱的动态分配机制研究

As a key technology in cognitive radio networks, dynamic spectrum allocation can fully exploit the spectrum holes and maximize spectrum utilization efficiency. Studies have shown that the spectrum auction, i.e. introducing the auction theory into dynamic spectrum allocation process, can efficiently manage the spectrum. However, to make the spectrum auction practical, more realistic and complex scenarios, such as the heterogeneous secondary spectrum auction scenario, should be taken into consideration. Unfortunately, due to the spatial heterogeneity and the frequency heterogeneity of the heterogeneous secondary spectrum auction scenario, there exist some problems in the economic-robustness and security when the existing spectrum auction mechanisms are extended to the scenario of heterogeneous secondary spectrum markets. Hence, this project will design a series of auction mechanisms, including (1) the universal framework of economically-robust auction to unify all kinds of auction frameworks for usage conveniently; (2) the attribute-aware economically-robust auction taking into consideration the attributes of spectrum for improving the service satisfactory of the second users; (3) privacy-preserving auction via secure multi-party computation for preserving the privacy of bidders to realize a secure auction. The purpose of the above contents is to reasonably allocate spectrum, making use of idle spectrum resources dynamically and resolving conflicts between the growing demands for wireless communications and limited radio spectrum resources.

作为认知无线电网络的一个关键技术，动态频谱分配可充分挖掘频谱空洞、最大化频谱利用效率。研究表明，将拍卖理论引入动态频谱分配过程，实现频谱拍卖，可高效管理频谱。 然而，要使频谱拍卖走向实用化，需考虑较为现实的复杂场景-异质次级频谱拍卖场景。遗憾的是，由于异质次级频谱拍卖场景的空间异质性、频率异质性，当现有的频谱拍卖机制应用到该场景时，在经济鲁棒性和安全性方面会存在一些问题。为此，本课题拟设计一套网络拍卖机制，包括（1）普适经济鲁棒拍卖框架，以统一各类拍卖框架，便于用户使用；（2）属性感知的经济鲁棒拍卖框架，在拍卖中考虑频谱属性，以提高次用户服务满意度；（3）基于安全多方计算的隐私保护拍卖，以保护投标人的隐私，实现安全拍卖。上述研究内容目的是对频谱进行合理分配，使空闲频谱资源得以动态利用，从根本上解决日益增长的无线通信需求与有限的无线频谱资源之间的矛盾。

作为认知无线电网络的一个关键技术，动态频谱分配可充分挖掘频谱空洞、最大化频谱利用效率。研究表明，将拍卖理论引入动态频谱分配过程实现频谱拍卖，可高效管理频谱。由于复杂场景异质次级频谱拍卖具有空间异质性、频率异质性，当现有的频谱拍卖机制应用到该场景时，在经济鲁棒性和安全性方面会存在一些问题。本课题设计了普适的经济鲁棒拍卖框架和拍卖中的信道分配与信道定价准则。在此基础上深入研究了频谱拍卖中的信道属性，提出并设计了属性感知的经济鲁棒拍卖策略。为保护投标人的隐私，设计了基于安全多方计算的隐私保护拍卖，为保护竞拍隐私、实现安全拍卖提供理论基础。上述研究内容使空闲频谱资源得以动态利用，从根本上解决日益增长的无线通信需求与有限的无线频谱资源之间的矛盾。在课题研究中，我们进行了广泛的国际交流合作，发表论文20余篇，研究成果对后续的频谱拍卖、隐私保护等领域的研究有重要意义。