APP下载

认知无线电资源分配技术综述

2018-06-28王灿李伟

科技创新与应用 2018年18期

王灿 李伟

摘 要:有限的频谱资源与人们日益增长的无线频谱需求之间的矛盾日渐突出和加剧,如何高效地提高频谱利用率成为了无线通信领域的重点研究方向。为有效提高频谱利用率,认知无线电技术应运而生。认知无线电资源分配是认知无线电的关键技术之一,高效的资源分配方法能够有效利用频谱资源,缓解频谱资源的匮乏,提高通信系统的效用,对优化认知无线电系统的性能起到关键的作用。文章基于认知无线电资源分配领域的专利文献,对认知无线电资源分配领域进行了专利技术分析,对认知无线电资源分配技术分支、全球申请量、国内主要申请人、国外主要申请人进行重点分析。

关键词:认知无线电;资源分配;频谱;功率

中图分类号:N18 文献标志码:A 文章编号:2095-2945(2018)18-0011-03

Abstract: The contradiction between the limited spectrum resources and the increasing demand of wireless spectrum is becoming more and more serious. How to improve the spectrum efficiency has become the key research direction in the field of wireless communication. In order to effectively improve the spectrum efficiency, cognitive radio technology emerged as the times require. Cognitive radio resource allocation is one of the key technologies of cognitive radio. Efficient resource allocation method can effectively utilize spectrum resources, alleviate the scarcity of spectrum resources, and improve the effectiveness of communication system, playing a key role in optimizing the performance of cognitive radio system. Based on the patent literature in the field of cognitive radio resource allocation, this paper analyzes the patent technology in the field of cognitive radio resource allocation. The technical branch of cognitive radio resource allocation, the number of applications in the world, the main applicants in China and the major applicants abroad are analyzed.

Keywords: cognitive radio; resource allocation; spectrum; power

引言

近幾年,随着不断出现的无线通信设备和无线通信应用,无线用户对频谱无线接入的渴求日益加剧。迫于人们对于无线资源的强烈渴求,且由于绝大多数适合通信的频段已经通过静态分配方式被分配殆尽,想要通过寻找新的频谱资源来满足用户需求因而成为一项极其艰巨的任务。传统的无线频谱资源分配采用静态分配的方式对频谱资源进行分配,也就是由频谱分配机构将特定频段长期地分配给特定的授权用户使用。通过调查研究发现,有些被授权的频段在大多数的时间段都未被占用,而其他有需求的用户因未授权而无法使用该频段,因此静态分配这种不灵活的频谱分配方式造成了频谱资源利用率低下。……

登录APP查看全文