协作多播组认知无线电网络的资源分配研究
发布时间：2018-07-22 11:49
【摘要】：现代社会经济的发展带动科技的进步,科技的快速进步促进无线通信服务的需求量迅速增长,这需要大量的频谱资源来支撑。然而,频谱资源十分有限,必须探索超越传统通信技术的新技术和新方法。为解决无线电频谱资源匮乏的问题,提出了认知无线电。认知无线电方案自首次提出便受到大量关注,因授权频段通信具有突发性,存在大量频谱空洞,新技术旨在使非授权与授权通信网络并存。在不对授权用户造成不可控干扰的前提下,非授权用户最大限度地使用授权频段,提高了频谱的利用率,一定程度上解决了频谱资源不足的问题。协作传输技术与传统点对点通信链路不同,对传输模型中存在的问题进行重新思考,根据中继的特点结合分集增益提出新的解决方案,提高系统传输容量,具有极大的潜在发展价值,是通信技术的重要研究方向。本文基于认知无线电网络,利用协作多播技术,最大限度的使用无线信道,提升服务质量,研究资源分配方案,具体内容如下:1.在现阶段研究基础上,提出了一种基于协作认知无线电网络的频谱感知方案,允许授权用户与认知用户之间就检测概率、感知时间、能量门限值等影响频谱感知和频谱分配的关键因素进行博弈,最大化各自的经济效益。在此基础上,应用博弈的思想分析授权用户与认知用户的行为策略,通过仿真实验,验证所提出的模型框架在一定程度上不仅提高了认知用户的收益,并且在保障授权用户的权益前提下提高了其最终收益,达到了双赢的目的。2.研究了基于组内组间协作传输的多播组机制,在认知无线电(Cognitive Radio,CR)网络中该传输机制下无线资源配置优化问题,考虑主用户和认知用户之间的信号干扰,及各用户的功率限制,理论分析优化用户传输速率,得出功率优化分配方案,仿真结果验证,在功率分配方案下,新机制可以使更多用户拥有更高的传输速率,当功率限制时,通过加权因子,可使主用户保持良好的用户性能。
[Abstract]:The development of modern society and economy leads to the progress of science and technology, and the rapid progress of science and technology promotes the demand for wireless communication services rapidly, which needs a large number of spectrum resources to support. However, the spectrum resources are very limited, we must explore new technologies and methods beyond traditional communication technology. In order to solve the problem of lack of radio spectrum resources, cognitive radio is proposed. Cognitive radio scheme has attracted much attention since it was first proposed. Because of the sudden nature of authorized frequency band communication, there are a large number of spectrum holes. The new technology aims to make unauthorized and authorized communication networks coexist. On the premise of not causing uncontrollable interference to authorized users, unauthorized users maximize the use of authorized frequency bands, improve the utilization of spectrum, and solve the problem of insufficient spectrum resources to a certain extent. The cooperative transmission technology is different from the traditional point-to-point communication link. The problems existing in the transmission model are reconsidered. According to the characteristics of relay and diversity gain, a new solution is proposed to improve the transmission capacity of the system. It has great potential development value and is an important research direction of communication technology. Based on cognitive radio network, this paper uses cooperative multicast technology to maximize the use of wireless channels, improve the quality of service, research resource allocation scheme, the specific content is as follows: 1. On the basis of current research, a spectrum sensing scheme based on cooperative cognitive radio network is proposed, which allows authorized users and cognitive users to detect probability and sensing time. The key factors affecting spectrum sensing and spectrum allocation, such as energy threshold, play games to maximize their respective economic benefits. On this basis, the game theory is applied to analyze the behavior strategies of authorized users and cognitive users. Through simulation experiments, it is verified that the proposed model framework not only improves the income of cognitive users to a certain extent. And in the premise of protecting the rights and interests of authorized users, it improves its final income and achieves the win-win goal. 2. 2. In this paper, the multicast group mechanism based on inter-group cooperative transmission is studied. In Cognitive Radio (CR) network, the problem of wireless resource allocation optimization is studied. The interference between primary and cognitive users is considered, and the power limitation of each user is considered. Through theoretical analysis and optimization of user transmission rate, the power allocation scheme is obtained. Simulation results show that the new mechanism can make more users have higher transmission rate under the power allocation scheme. When power is limited, the weighting factor is adopted. Can make the main user maintain good user performance.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN925
本文编号：2137362
[Abstract]:The development of modern society and economy leads to the progress of science and technology, and the rapid progress of science and technology promotes the demand for wireless communication services rapidly, which needs a large number of spectrum resources to support. However, the spectrum resources are very limited, we must explore new technologies and methods beyond traditional communication technology. In order to solve the problem of lack of radio spectrum resources, cognitive radio is proposed. Cognitive radio scheme has attracted much attention since it was first proposed. Because of the sudden nature of authorized frequency band communication, there are a large number of spectrum holes. The new technology aims to make unauthorized and authorized communication networks coexist. On the premise of not causing uncontrollable interference to authorized users, unauthorized users maximize the use of authorized frequency bands, improve the utilization of spectrum, and solve the problem of insufficient spectrum resources to a certain extent. The cooperative transmission technology is different from the traditional point-to-point communication link. The problems existing in the transmission model are reconsidered. According to the characteristics of relay and diversity gain, a new solution is proposed to improve the transmission capacity of the system. It has great potential development value and is an important research direction of communication technology. Based on cognitive radio network, this paper uses cooperative multicast technology to maximize the use of wireless channels, improve the quality of service, research resource allocation scheme, the specific content is as follows: 1. On the basis of current research, a spectrum sensing scheme based on cooperative cognitive radio network is proposed, which allows authorized users and cognitive users to detect probability and sensing time. The key factors affecting spectrum sensing and spectrum allocation, such as energy threshold, play games to maximize their respective economic benefits. On this basis, the game theory is applied to analyze the behavior strategies of authorized users and cognitive users. Through simulation experiments, it is verified that the proposed model framework not only improves the income of cognitive users to a certain extent. And in the premise of protecting the rights and interests of authorized users, it improves its final income and achieves the win-win goal. 2. 2. In this paper, the multicast group mechanism based on inter-group cooperative transmission is studied. In Cognitive Radio (CR) network, the problem of wireless resource allocation optimization is studied. The interference between primary and cognitive users is considered, and the power limitation of each user is considered. Through theoretical analysis and optimization of user transmission rate, the power allocation scheme is obtained. Simulation results show that the new mechanism can make more users have higher transmission rate under the power allocation scheme. When power is limited, the weighting factor is adopted. Can make the main user maintain good user performance.
【学位授予单位】：郑州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN925
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相关期刊论文 前1条
1 王凡森;赵拯;陈志刚;;一种基于子载波合并的多播资源调度算法[J];电子与信息学报;2014年05期
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