Public Safety Communications: Enhancement Through Cognitive Radio and Spectrum Sharing Principles
Public Safety Communications: Enhancement Through Cognitive Radio and Spectrum Sharing Principles
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DOI：
10.1109/mvt.2012.2190180
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发表时间：
2012-04
影响因子：
8.1
通讯作者：
R. Ferrús;O. Sallent;G. Baldini;L. Goratti
中科院分区：
文献类型：
--
作者：
R. Ferrús;O. Sallent;G. Baldini;L. Goratti
无线通信技术在应急救灾中发挥着不可替代的作用。人们普遍认为，现有的公共安全(PS)无线通信设施在许多危急情况下往往不能满足用户的需求。紧急情况通常会导致异常高的流量负载，而网络容量不足是需要克服的主要限制之一。在此背景下，本文首先讨论了在紧急情况下能够增加容量的几个维度，然后将注意力放在频谱共享作为这些关键维度之一的作用上。在这方面，对可能的应急通信频谱共享模型进行了全面的研究。给出了每种共享模式的关键原理，并通过说明性例子描述了其适用性，其中，认知无线电(CR)技术是实现这些共享模式的主要技术使能。最后，对各种频谱共享模型的可行性进行了讨论。
Wireless communications technologies play an irreplaceable role in emergency and disaster relief situations. It is generally acknowledged that the existing public safety (PS) wireless communications facilities frequently fall short of meeting users' needs in many critical situations. Emergency scenarios usually lead to exceptionally high traffic loads, and the lack of network capacity is one of the major limitations to overcome. In this context, this article first discusses about several dimensions that enable increased capacity in emergency scenarios, and then the attention is placed on the role of spectrum sharing as one of these key dimensions. In this regard, a comprehensive view of possible spectrum-sharing models for emergency communications is developed. The key principles underlying each sharing model are given, and its applicability is described through illustrative examples, where it is made evident that cognitive radio (CR) technology constitutes a major technological enabler for their realization. Finally, a discussion on the feasibility of each of the spectrum sharing models is addressed.