The Research Of Cognitive Anti-jamming Networking Technology For Collaborative Guidance Data Link

The symbolic of information warfare is the combat network based on data link.In order to improve the information and intelligence level of missiles and meet the needs of multi-missiles collaborative combat mission,it is an urgent problem to study a new kind of data link which is suitable for efficient and reliable communication between high dynamic flight nodes.Unlike traditional data link,the collaborative guidance data link has put forward higher requirements ondynamic networking capability and anti-jamming ability.It has changed the networking mode from the simple end-to-end link networking to non-central self-organizing networking.And,the physical layer anti-jamming has developed to the network level cognitive anti-jamming in viability of the network.Based on the above background,we study the technology of cognitive anti-jamming networking in cooperative guided data link.In order to improve the network performance,meet the fast dynamics of collaborative guidance data link and the high reliability networking requirements,we use the hierarchical network model of mobile Ad hoc network to improve the protocol of collaborative guidance data link,and specifically study the MAC protocol and routing protocol.At the same time,aiming at the lack of anti-jamming ability in the single physical layer and the stronger anti-jamming requirement of the data link,we improve the routing protocol by cross-layer design,integrate the link quality information of physical layer into routing decision,complete the more systematic and intelligent anti-jamming design,and realize the network level anti-jamming,improve the survivability and fault tolerance of the communication system.Therefore,the following four aspects of work are carried out in this paper.In view of the special application background and working environment of collaborative guidance data link,a cognitive anti-jamming network protocol stack model is proposed.The cross layer design method of the protocol stack and cognitive communication idea are introduced to optimize the design of data chain.Secondly,the MAC protocol of collaborative guided data link is discussed.Asthe most important part of the link layer,the MAC protocol directly affects the network delay and throughput.In order to meet the transmission requirements of real time services and solve the problem of dynamic entry of unplanned nodes,this paper introduces the design idea of TDMA and SPMA protocol used in American data link,and designs a DTDMA access protocol which can realize time slot dynamic reservation according to the task situation.Thirdly,in order to truly realize the dynamic networking function of the collaborative guidance data link,we introduce the network layer routing technology.On the basis of theoretical analysis,the applicability of several typical routing protocols in high dynamic scenarios is verified by experiments,and to choose the routing protocol OLSR_ETX which is more suitable for collaborative guidance data link.Finally,in order to improve the anti-jamming ability of the data chain network level,based on the optimized routing,we introduce the cross-layer design to obtain the underlying layer information in real time and take it as the criterion of routing selection,and propose a cognitive anti-jamming cross layer routing protocol C-OLSR.The experimental results show that the protocol can still maintain high throughput and lower delay under the jamming condition.The comprehensive performance is better than the original protocol OLSR_ETX,and it can meet the application requirements of the collaborative guidance data link.