Research Of Information Dissemination Technology In Information Grid Served For Sea Battlefield

Under the conditions of modern network, an important feature of joint combat at sea is that battlefield environment and situation are more complex and change more rapidly. The opportunity for combat now is fleeting, the characteristic of nonlinear is more prominent. The expanding demand of information, increasingly complex of navy electromagnetic environment, limited wireless bandwidth and transmission quality have become the direct constrains of efficiency of the sensors, command and control system and weapons. In order to send the right information to the appropriate battle node at the right time, the information dissemination problem must be solved under the condition of grid. Efficient information dissemination technology should be researched. This paper does some related research work about this.This paper firstly introduces the supporting technology - Grid, then describes the characteristics of the definition of the grid, deeply studies the Grid's five-layer structure and the OGSA specifications. The technologies of information dissemination and data distribution in and abroad are also summarized on.After analysis of current information dissemination technology of battlefield, this paper makes a classification and detailed description of battlefield information. On the basis of analysis above, six requirement analysis are presented: load balancing, dynamic restructuring and reorganization of survivability, information retrieval, system status monitoring, distribution of quality requirements, performance requirements.After considering the function requirements above and the characteristics of information dissemination in battlefield, this paper proposes the application of"publish/subscribe"model to realize information dissemination."publish/subscribe"model which allows information exchange between the parties completely decoupled in time, space and control is more suitable for asynchronous communication under the condition of limited network bandwidth. After the research, this paper gives three matching algorithms, and has made the comparison of them in accuracy and coverage.Finally, based on the research above, this paper designs a demonstration system of information dissemination in sea battlefield, shows the system structure and information dissemination center network structure, and presents functions of the specific modules. This work makes a foundation for next research of information dissemination system in future.