Currently radio network resource is rigidly partitioned for dedicated purposes. Most of the spectrum is already allocated, but a large part of it is underutilized and the utilization varies greatly in time and space. The exclusive license of fixed size spectrum blocks separated by fixed guard bands easily solves the interference problems; however, the fixed allocation of spectrum is clearly inadequate for providing optimal spectrum efficiency for spatially and temporarily varying loads.
rnDynamic spectrum allocation is a new and promising alternative to fixed allocation schemes. In Dynamic Spectrum Access (DSA) networks the assigned spectrum block may vary in time and space, too.
rnIn this paper we describe a new spatio-temporal spectrum management model for DSA networks. We also describe an architecture that splits the complex problem into Temporal and Spatial Dynamic Spectrum Allocation (TDSA and SDSA). In our model Regional Spectrum Brokers (RSB) coordinate the temporal dynamic spectrum allocation for a given region within which we assume that the spatial distribution of the spectrum demand is homogeneous. There is a centralized entity also, called Spectrum Broker Coordinator (SBC), which stores the spectrum demands of the regions, and the spectrum management at the borders of the regions is realized based on this information.
当前,无线电网络资源已严格划分以用于专用目的。大部分频谱已被分配,但其中大部分未被充分利用,利用在时间和空间上相差很大。由固定保护带分隔的固定大小频谱块的专有许可证可以轻松解决干扰问题;但是,频谱的固定分配显然不足以为空间和临时变化的负载提供最佳的频谱效率。 P> rn
动态频谱分配是固定分配方案的一种新的有希望的替代方案。在动态频谱访问(DSA)网络中,分配的频谱块也可能在时间和空间上发生变化。 P> rn
本文介绍了一种用于DSA网络的时空频谱管理模型。我们还描述了一种将复杂问题分解为时间和空间动态频谱分配(TDSA和SDSA)的体系结构。在我们的模型中,区域频谱经纪人(RSB)协调给定区域的时间动态频谱分配,在该区域内,我们假设频谱需求的空间分布是均匀的。还有一个集中的实体,称为Spectrum Broker Coordinator(SBC),它存储区域的频谱需求,并根据此信息实现区域边界的频谱管理。 P>
Budapest University of Technology and Economics, Budapest, Hungary;
机译:认知毫微微小区网络:用于本地化动态频谱访问的覆盖架构[动态频谱管理]
机译:用于动态频谱接入网络中的次级频谱接入的多州连续时间马尔可夫链模型
机译:动态频谱接入网络中具有感知缺陷的基于频谱拍卖的基于代理的模型
机译:基于协调动态频谱访问的蜂窝网络中的频谱管理
机译:认知无线电网络的异步合作频谱感知方案和宽带动态频谱接入算法设计。
机译:基于马尔可夫模型的多类混合频谱接入认知无线电网络中有效频谱切换的分析
机译:动态频谱接入网络中频谱使用的经验建模和自适应频谱感知评估
机译:具有传输超空间的动态频谱接入网中的频谱整形挑战。