Wireless avionics intra-communications(WAIC)is an emergent research topic,since it can improve fuel efficiency and enhance aircraft safety significantly.However,there are numerous baffles in an aircraft,e.g.,seats and...Wireless avionics intra-communications(WAIC)is an emergent research topic,since it can improve fuel efficiency and enhance aircraft safety significantly.However,there are numerous baffles in an aircraft,e.g.,seats and cabin bulkheads,resulting in serious blockage and even destroying wireless communications.Thus,this paper focuses on the reconfigurable intelligent surface(RIS)deployment issue of RIS-assisted WAIC systems,to solve the blockage problem caused by baffles.We first propose the mirror-symmetric imaging principle for mathematically analyzing electromagnetic(EM)wave propagation in a metal cuboid,which is a typical structure of WAIC systems.Based on the mirror-symmetric imaging principle,the mathematical channel model in a metal cuboid is deduced in detail.In addition,we develop an objective function of RIS's location and deduce the optimal RIS deployment location based on the geometric center optimization lemma.A two-dimensional gravity center search algorithm is then presented.Simulation results show that the designed RIS deployment can greatly increase the received power and efficiently solve the blockage problem in the aircraft.展开更多
针对分组交换网性能评价问题,首先运用确定网络演算理论与方法,分析了航空全双工交换以太网(AFDX,Avionics Full DupleX Switched Ethernet)中数据传输的性能,证明了AFDX数据传输的确定性,给出了保障可靠数据传输网络参数的配置方案;其...针对分组交换网性能评价问题,首先运用确定网络演算理论与方法,分析了航空全双工交换以太网(AFDX,Avionics Full DupleX Switched Ethernet)中数据传输的性能,证明了AFDX数据传输的确定性,给出了保障可靠数据传输网络参数的配置方案;其次,围绕有线-无线混合(WcW)网中贯穿流的随机特性,利用随机网络演算理论与方法,分析并推导出了WcW网络的数据传输性能边界。展开更多
基金supported by the National Natural Science Foundation of China under Grand No.62071148 and No.62171151partly by the Natural Science Foundation of Heilongjiang Province of China under Grand No.YQ2019F009partly by the Fundamental Research Funds for Central Universities under Grand No.HIT.OCEF.2021012。
文摘Wireless avionics intra-communications(WAIC)is an emergent research topic,since it can improve fuel efficiency and enhance aircraft safety significantly.However,there are numerous baffles in an aircraft,e.g.,seats and cabin bulkheads,resulting in serious blockage and even destroying wireless communications.Thus,this paper focuses on the reconfigurable intelligent surface(RIS)deployment issue of RIS-assisted WAIC systems,to solve the blockage problem caused by baffles.We first propose the mirror-symmetric imaging principle for mathematically analyzing electromagnetic(EM)wave propagation in a metal cuboid,which is a typical structure of WAIC systems.Based on the mirror-symmetric imaging principle,the mathematical channel model in a metal cuboid is deduced in detail.In addition,we develop an objective function of RIS's location and deduce the optimal RIS deployment location based on the geometric center optimization lemma.A two-dimensional gravity center search algorithm is then presented.Simulation results show that the designed RIS deployment can greatly increase the received power and efficiently solve the blockage problem in the aircraft.
文摘针对分组交换网性能评价问题,首先运用确定网络演算理论与方法,分析了航空全双工交换以太网(AFDX,Avionics Full DupleX Switched Ethernet)中数据传输的性能,证明了AFDX数据传输的确定性,给出了保障可靠数据传输网络参数的配置方案;其次,围绕有线-无线混合(WcW)网中贯穿流的随机特性,利用随机网络演算理论与方法,分析并推导出了WcW网络的数据传输性能边界。
