As a new sort of mobile ad hoc network(MANET), aeronautical ad hoc network(AANET) has fleet-moving airborne nodes(ANs) and suffers from frequent network partitioning due to the rapid-changing topology. In this work, t...As a new sort of mobile ad hoc network(MANET), aeronautical ad hoc network(AANET) has fleet-moving airborne nodes(ANs) and suffers from frequent network partitioning due to the rapid-changing topology. In this work, the additional relay nodes(RNs) is employed to repair the network and maintain connectivity in AANET. As ANs move, RNs need to move as well in order to re-establish the topology as quickly as possible. The network model and problem definition are firstly given, and then an online approach for RNs' movement control is presented to make ANs achieve certain connectivity requirement during run time. By defining the minimum cost feasible moving matrix(MCFM), a fast algorithm is proposed for RNs' movement control problem. Simulations demonstrate that the proposed algorithm outperforms other control approaches in the highly-dynamic environment and is of great potential to be applied in AANET.展开更多
Attacking time-sensitive targets has rigid demands for the timeliness and reliability of information transmission, while typical Media Access Control（MAC） designed for this application works well only in very light-...Attacking time-sensitive targets has rigid demands for the timeliness and reliability of information transmission, while typical Media Access Control（MAC） designed for this application works well only in very light-load scenarios; as a consequence, the performances of system throughput and channel utilization are degraded. For this problem, a feedback-retransmission based asynchronous FRequency hopping Media Access（FRMA） control protocol is proposed. Burst communication, asynchronous Frequency Hopping（FH）, channel coding, and feedback retransmission are utilized in FRMA. With the mechanism of asynchronous FH, immediate packet transmission and multi-packet reception can be realized, and thus the timeliness is improved.Furthermore, reliability can be achieved via channel coding and feedback retransmission. With theories of queuing theory, Markov model, packets collision model, and discrete Laplace transformation, the formulas of packet success probability, system throughput, average packet end-to-end delay, and delay distribution are obtained. The approximation accuracy of theoretical derivation is verified by experimental results. Within a light-load network, the proposed FRMA has the ability of millisecond delay and 99% reliability as well as outperforms the non-feedback-retransmission based asynchronous frequency hopping media access control protocol.展开更多
Connectivity is the premise and foundation of networking and routing.For the probabilistic flight path of military aircraft resulting in the difficulty of Aeronautical Ad hoc NETwork(AANET) research,an estimation meth...Connectivity is the premise and foundation of networking and routing.For the probabilistic flight path of military aircraft resulting in the difficulty of Aeronautical Ad hoc NETwork(AANET) research,an estimation method of connectivity probability is proposed.The method takes airspace as the research object,starts with actual flight characteristics,and applies conclusions of random waypoint mobility model.Building a connectivity model by establishing Airspace Unit Circle(AUC) from the perspective of circle-circle coverage,the method obtains a theory of airspace network connectivity.Experiment demonstrates its correctness.Finally,according to the actual condition simulation,relationship between the number of aircraft,communication radius,and the flight area under connectivity probabilities is achieved,results provide reference for creating a network that under certain aerial combat condition.展开更多
针对贪婪周边无状态路由(GPSR,greedy perimeter stateless routing)协议在航空自组网中存在难以适应高动态网络环境、易导致网络拥塞等问题,提出一种基于TTE(time to enter the communication range of the destination)的多路径流量...针对贪婪周边无状态路由(GPSR,greedy perimeter stateless routing)协议在航空自组网中存在难以适应高动态网络环境、易导致网络拥塞等问题,提出一种基于TTE(time to enter the communication range of the destination)的多路径流量分配负载均衡地理路由(LBGR,load balancing geographic routing)协议。该协议将TTE作为路由决策依据,具体包括分组转发策略、多路径流量分配策略和局部最优化处理策略等3种机制。进一步采用排队论对多路径流量分配策略进行了建模分析,得出了平均队长、平均等待队长、平均等待时间等性能指标的数学表达式。最后利用OMNe T++仿真平台对LBGR协议的性能进行了仿真验证,结果表明相比GPSR等协议,LBGR协议在分组传输成功率和端到端时延方面有较大幅度的提升,能够有效适应高动态航空环境。展开更多
媒体接入控制协议MAC(Media access control protocol)是航空自组网的关键技术之一,主要解决多个飞行器如何高效共享通信信道的问题,直接影响着网络的吞吐量、传输时延、网络规模和组网灵活性。由于航空自组网网络拓扑高速动态变化,节...媒体接入控制协议MAC(Media access control protocol)是航空自组网的关键技术之一,主要解决多个飞行器如何高效共享通信信道的问题,直接影响着网络的吞吐量、传输时延、网络规模和组网灵活性。由于航空自组网网络拓扑高速动态变化,节点分布尺度较大,高空无线信道质量较差等特殊性,其MAC协议和传统地面移动自组网MAC协议有着较大的区别。对航空自组网发展进行了介绍,概述了航空自组网对MAC协议的要求,并深入分析比较了当前几类主要的航空自组网MAC协议,最后进行了总结和展望。该综述为航空自组网MAC协议的研发和应用提供了一定的理论和技术基础。展开更多
文摘As a new sort of mobile ad hoc network(MANET), aeronautical ad hoc network(AANET) has fleet-moving airborne nodes(ANs) and suffers from frequent network partitioning due to the rapid-changing topology. In this work, the additional relay nodes(RNs) is employed to repair the network and maintain connectivity in AANET. As ANs move, RNs need to move as well in order to re-establish the topology as quickly as possible. The network model and problem definition are firstly given, and then an online approach for RNs' movement control is presented to make ANs achieve certain connectivity requirement during run time. By defining the minimum cost feasible moving matrix(MCFM), a fast algorithm is proposed for RNs' movement control problem. Simulations demonstrate that the proposed algorithm outperforms other control approaches in the highly-dynamic environment and is of great potential to be applied in AANET.
基金supported by the National Natural Science Foundation of China(No.61501496)
文摘Attacking time-sensitive targets has rigid demands for the timeliness and reliability of information transmission, while typical Media Access Control（MAC） designed for this application works well only in very light-load scenarios; as a consequence, the performances of system throughput and channel utilization are degraded. For this problem, a feedback-retransmission based asynchronous FRequency hopping Media Access（FRMA） control protocol is proposed. Burst communication, asynchronous Frequency Hopping（FH）, channel coding, and feedback retransmission are utilized in FRMA. With the mechanism of asynchronous FH, immediate packet transmission and multi-packet reception can be realized, and thus the timeliness is improved.Furthermore, reliability can be achieved via channel coding and feedback retransmission. With theories of queuing theory, Markov model, packets collision model, and discrete Laplace transformation, the formulas of packet success probability, system throughput, average packet end-to-end delay, and delay distribution are obtained. The approximation accuracy of theoretical derivation is verified by experimental results. Within a light-load network, the proposed FRMA has the ability of millisecond delay and 99% reliability as well as outperforms the non-feedback-retransmission based asynchronous frequency hopping media access control protocol.
文摘Connectivity is the premise and foundation of networking and routing.For the probabilistic flight path of military aircraft resulting in the difficulty of Aeronautical Ad hoc NETwork(AANET) research,an estimation method of connectivity probability is proposed.The method takes airspace as the research object,starts with actual flight characteristics,and applies conclusions of random waypoint mobility model.Building a connectivity model by establishing Airspace Unit Circle(AUC) from the perspective of circle-circle coverage,the method obtains a theory of airspace network connectivity.Experiment demonstrates its correctness.Finally,according to the actual condition simulation,relationship between the number of aircraft,communication radius,and the flight area under connectivity probabilities is achieved,results provide reference for creating a network that under certain aerial combat condition.
文摘针对贪婪周边无状态路由(GPSR,greedy perimeter stateless routing)协议在航空自组网中存在难以适应高动态网络环境、易导致网络拥塞等问题,提出一种基于TTE(time to enter the communication range of the destination)的多路径流量分配负载均衡地理路由(LBGR,load balancing geographic routing)协议。该协议将TTE作为路由决策依据,具体包括分组转发策略、多路径流量分配策略和局部最优化处理策略等3种机制。进一步采用排队论对多路径流量分配策略进行了建模分析,得出了平均队长、平均等待队长、平均等待时间等性能指标的数学表达式。最后利用OMNe T++仿真平台对LBGR协议的性能进行了仿真验证,结果表明相比GPSR等协议,LBGR协议在分组传输成功率和端到端时延方面有较大幅度的提升,能够有效适应高动态航空环境。
文摘媒体接入控制协议MAC(Media access control protocol)是航空自组网的关键技术之一,主要解决多个飞行器如何高效共享通信信道的问题,直接影响着网络的吞吐量、传输时延、网络规模和组网灵活性。由于航空自组网网络拓扑高速动态变化,节点分布尺度较大,高空无线信道质量较差等特殊性,其MAC协议和传统地面移动自组网MAC协议有着较大的区别。对航空自组网发展进行了介绍,概述了航空自组网对MAC协议的要求,并深入分析比较了当前几类主要的航空自组网MAC协议,最后进行了总结和展望。该综述为航空自组网MAC协议的研发和应用提供了一定的理论和技术基础。
