无线接入网中基于绿色特性的新型协作安全关键技术研究

The cooperative technology of wireless access network receives much attention from a variety of academic institutions due to its advantages of extensive coverage, huge capacity, high Spectral efficiency and strong robustness, while it also brings more potential security threats. In this project, starting with reverse thinking, we will precisely take advantage of the characteristics of its cooperation to establish novel cooperative security mechanisms, and aim to effectively solve the security problems in wireless access network. Therefore, this project focuses on how to effectively guarantee the security of the communication system, and simultaneously takes consideration of the usage of green energy and the reduction of energy consumption. The main research content are as follows.1) The cooperative-oriented secure deployment of the infrastructure, includes the deployment of several kinds of base stations, the static and dynamic deployment of relays, the evaluation of network security of deployment and the corresponding optimization based on secrecy graph.2) The green-oriented cooperative security mechanisms for the base stations include cooperative security among several kinds of base stations, efficient secure transmission based on time reverse technology and the smart sleep policy in consideration of security. 3) Efficient cooperative security based on relay clusters, including the form of secure relay cluster, suppression of eavesdropping for internal and external cluster, and cooperation incentive mechanisms. This project will construct a cooperative security theory system, so as to contribute to open up new ideas for the deployment and cooperation issues of future wireless access network, and fill in the blank of domestic and foreign research in this field.

无线接入网的协作技术以其广覆盖、大容量、高频谱利用率、强鲁棒性等优势，得到了众多研究机构的青睐，但同时也导致了更多的安全隐患。本项目着眼于，在无线接入网中，逆向思维出发，恰恰利用其协作的特点建立新型协作安全机制，有力地解决其安全问题。已有协作安全机制一般基于物理层安全技术，其扩展性差、耗能大、资源利用率低。因此，如何有效保障通信安全性，并在其基础上考虑绿色能源利用和降低能耗的问题是本项目研究重点。主要研究内容：1)面向协作的基础设施安全部署，包括多类型基站部署、静/动态中继部署、基于安全图的网络评估及优化；2）面向绿色的基站协作安全，包括宏/微基站协作安全、基于时间反转的高效安全传输、安全智能休眠机制；3）基于中继簇的高效协作安全，包括安全中继簇形成、簇内/外窃听抑制、协作激励机制。本项目的研究将为未来无线接入网的部署与协作开辟新思路，建立协作安全理论体系，填补国内外在该领域的研究空白。

针对无线接入网中基于绿色特性的新型协作安全关键技术，本项目提出了系列创新的方案和算法，分析和验证表明方案能达到预期目标，具有很好的应用价值。主要包括：1）面向协作的基础设施安全部署。设计了基站与中继混合部署方案，拓展了已有的安全图理论，提高了部署安全性。2）面向绿色的基站协作安全。针对异构无线网络中窃听问题，设计了节点协作以及窃听节点抑制方案，并结合时间反转技术实现安全和能量消耗降低的双重目的。提出了具有安全保障的混合智能基站休眠策略，有效实现能量降耗。3）基于中继簇的高效协作安全。提出了一种基于社交信息和物理距离的节点动态成簇机制，实现了系统吞吐量及能效的提升。同时，提出了一种具有绿色特性的协作安全激励机制方案，有效激励用户参与安全协作。4）依托新型异构网络架构，研究了D2D通信无线资源管理的基础问题以及其在社交网络中的扩展，充分利用社交信息，进一步提高了资源高效利用特征。