UAV networks often encounter jamming attacks, under which multi-radio protocols have to switch radios to accelerate communication recovery. However, the existing protocols rely on exchange of hello messages to detect ...UAV networks often encounter jamming attacks, under which multi-radio protocols have to switch radios to accelerate communication recovery. However, the existing protocols rely on exchange of hello messages to detect jamming, leading to long sensing time and thus slow routing recovery. To address the issues raised by jamming attacks, we propose a new routing protocol, Electromagnetic Spectrum situation awareness Optimized Link State Routing (ESOLSR) protocol, to improve the existing OLSRv2 protocol. ESOLSR utilizes the spectrum situation awareness capability from the physical layer, and adopts joint-updating of link status, updating of interface functions, and adaptive adjustment of parameters. Our simulation results show that the improved protocol, ESOLSR, can recover routing and resume normal communication 26.6% faster compared to the existing protocols.展开更多
With the wider use of UAV in various fields,the raising task complexity and the increasing environmental uncertainties,the higher requirements for UAV technology are put forward.The bionic UAV cluster system has the p...With the wider use of UAV in various fields,the raising task complexity and the increasing environmental uncertainties,the higher requirements for UAV technology are put forward.The bionic UAV cluster system has the potential advantages of good stealth performance,strong environmental adaptability,wide expansion of task and high operational efficiency.It has excellent prospects in future information warfare,electronic warfare and conventional combat field.By reviewing the development of bionic UAV cluster technology,this paper summarizes and analyzes the latest research progresses of the key technologies such as aerodynamic mechanism and aerodynamic configuration design,driving mechanism design,autonomous flight control,adaptive networking and cluster control of bionic aircrafts.展开更多
采用定向天线进行蜂群组网,具有空间复用度高、信号传输距离远、抗干扰以及低截获的先天优势。无人机蜂群在编队前期,需要快速发现相邻节点进行组网,因此邻居发现是组网的必要前提,对MAC层和网络层的相关设计有着重要的影响。针对采用...采用定向天线进行蜂群组网,具有空间复用度高、信号传输距离远、抗干扰以及低截获的先天优势。无人机蜂群在编队前期,需要快速发现相邻节点进行组网,因此邻居发现是组网的必要前提,对MAC层和网络层的相关设计有着重要的影响。针对采用定向天线的组网模式,在基于扫描方式的邻居发现规划型算法(scan-base algorithm-deterministic,SBA-D)的基础上,提出了基于邻居交集迭代发现的方案(neighbor discovery algorithm based on iterative common neighbors,ICN-ND),充分利用已知的邻居信息,在相邻节点之间寻找邻居集合中的交集,利用公共邻居来提高邻居发现的效率,加快邻居发现的过程,进而降低无人机前期组网的时延,此外为了降低邻居信息交互的数据量,对表征邻居位置的数据结构进行了优化。最后的仿真实验表明,在不同节点密度和不同天线波束宽度下,ICN-ND算法收敛速度以及发现全部邻居所需时隙数远远优于SBA-D。展开更多
基金supported in part by National Natural Science Foundation of China(Nos.61931011 and 62372230)the Jiangsu Provincial Key Research and Development Program,China(No.BE2021013-4).
文摘UAV networks often encounter jamming attacks, under which multi-radio protocols have to switch radios to accelerate communication recovery. However, the existing protocols rely on exchange of hello messages to detect jamming, leading to long sensing time and thus slow routing recovery. To address the issues raised by jamming attacks, we propose a new routing protocol, Electromagnetic Spectrum situation awareness Optimized Link State Routing (ESOLSR) protocol, to improve the existing OLSRv2 protocol. ESOLSR utilizes the spectrum situation awareness capability from the physical layer, and adopts joint-updating of link status, updating of interface functions, and adaptive adjustment of parameters. Our simulation results show that the improved protocol, ESOLSR, can recover routing and resume normal communication 26.6% faster compared to the existing protocols.
文摘With the wider use of UAV in various fields,the raising task complexity and the increasing environmental uncertainties,the higher requirements for UAV technology are put forward.The bionic UAV cluster system has the potential advantages of good stealth performance,strong environmental adaptability,wide expansion of task and high operational efficiency.It has excellent prospects in future information warfare,electronic warfare and conventional combat field.By reviewing the development of bionic UAV cluster technology,this paper summarizes and analyzes the latest research progresses of the key technologies such as aerodynamic mechanism and aerodynamic configuration design,driving mechanism design,autonomous flight control,adaptive networking and cluster control of bionic aircrafts.
文摘采用定向天线进行蜂群组网,具有空间复用度高、信号传输距离远、抗干扰以及低截获的先天优势。无人机蜂群在编队前期,需要快速发现相邻节点进行组网,因此邻居发现是组网的必要前提,对MAC层和网络层的相关设计有着重要的影响。针对采用定向天线的组网模式,在基于扫描方式的邻居发现规划型算法(scan-base algorithm-deterministic,SBA-D)的基础上,提出了基于邻居交集迭代发现的方案(neighbor discovery algorithm based on iterative common neighbors,ICN-ND),充分利用已知的邻居信息,在相邻节点之间寻找邻居集合中的交集,利用公共邻居来提高邻居发现的效率,加快邻居发现的过程,进而降低无人机前期组网的时延,此外为了降低邻居信息交互的数据量,对表征邻居位置的数据结构进行了优化。最后的仿真实验表明,在不同节点密度和不同天线波束宽度下,ICN-ND算法收敛速度以及发现全部邻居所需时隙数远远优于SBA-D。
