科研之友
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摘要
With the rapid growth of wireless devices and applications, limited spectrum resource has become the bottleneck of network development. Cognitive radio has emerged as a promising approach to address spectrum scarcity by opening the access of idle licensed spectrum, owned by Primary Users (PUs), to unlicensed users, i.e., Secondary Users (SUs). This process involves two significant challenges: how to encourage PUs to open the access of licensed spectrum and how to assign the bandwidth among SUs. Additionally, the amount of residual bandwidth of a PU is always limited and an SU's bandwidth demand is always lower-bounded according to Quality of Service (QoS) requirements. Therefore, it is essential to assign the bandwidth on the basis of bandwidth limitation and QoS requirement. In this paper, we propose an iterative auction scheme, in which PUs and SUs form amarket and trade the bandwidth, to jointly address the problems above. We incorporate the price scheduling process into our auction design. The simulation results verifies the convergence and efficiency of our auction scheme.
- 出版日期2015-2
- 单位北京交通大学
