Research On The Integrated TT&C And Communication Transmission System

In order to adapt to the complex environment and compound tasks of the modern air battle, the comprehensive information support system, which is network-based and multi-functional converged, plays a more and more important role. On the one hand, the system needs to form a battlefield area network with a variety of combat platforms, to provide flexible and versatile combat support. On the other hand, the organic integration of independent systems and measurement methods can provide rational allocation of resources to combat, and the system will offer accurate, efficient and comprehensive processing capacities. Only to achieve the integration of multi-function and multi-platform synergy, can we provide powerful information supports for the modern integrated combat system.Aiming at the comprehensive information support system, this thesis is based on the network scenario of airborne multiple platforms and multiple services transmission requirements, with the integrated of TT&C and Communication transmission system as the research subject. The research is mainly focused on the following contents:Firstly, the overall architecture of the integrated TT&C and Communication transmission system is researched. Aiming the needs of multi-function and multi-platform synergy of the air combat system, this thesis establishes the integrated TT&C and Communication system, puts forward the ad-hoc network topology, and proposes the business classification model according to different data transmission demands. To solve the problems of the network, a network protocol system is built, forming with the application layer, network layer, data link layer and physical layer. Meanwhile, the unified messaging standards are designed to process and transmit the multiple business data unified.Secondly, based on the overall architecture, the network system and channel access system are further studied. In the network layer, to optimize the allocation of resources, the integrated network is modeled as a hierarchical clustering ad-hoc network model. Considering the node connectivity, positioning measurement ability and transmission power, an on-demand Clustering algorithm based on AOW is put forward. In order to make the network flexible and efficient, the network management system is researched mainly in the study of the hierarchical distributed network synchronization mechanism, the management strategy of into/out of the net and the node power control scheme based on relative distance topology control.In the research of the channel access system of the integrated system, in order to improve the channel utilization,a joint TDMA_CDMA multiple access system is designed for hierarchical clustering ad-hoc network model. In this system, different spread spectrum codes are used to devise communication channels among clusters, while the Dynamic TDMA protocol is used for communications within the cluster. To guarantee the transmission demands for different levels of businesses, a DTDMA protocol based on the business classification is been raised, with the design of the protocol frame structure, the time slot structure and the slot allocation algorithm to guarantee the QoS of the businesses. Through above, an integrated navigation and positioning algorithm based on the DTDMA protocol is proposed.At last, based on the above researches, the integrated TT&C and Communication transmission system is modeled and simulated. Here comes the simulation results: The end-to-end delay of the four levels are 50 ms, 150 ms, 300 ms and 500 ms, which are better than many data link systems, and this integrated system can satisfy the transmission demands of different business because of the business classification mechanism. The network throughput is 4Mbps, while the network efficiency is 48%, which show the transmission abilities of the integrated TT&C and Communication transmission system that can meet the higher requirements of the system compared with the existing systems.