The Ground-air Communication Network Research Based On The Close Air Support

Close air support(CAS)is a new type combat mode of the recent research based on Air-Ground Battle joint operations system.Using powerful air power to support and cover the ground unit,through underground unit precise guide,the air unit can effectively complete precision attack important targets.Close air support system,by using data link system to integrate the battlefield,weapons systems,voice communication and so on,achieves real-time data exchange and information sharing between the ground units with air units.Close air support is an important point in the accompanying support for data exchange and information sharing between ground units and air units.At the traditional operational mode,the various armed forces are lack of connection for each other.Especially at the end of military operations,the real-time information cannot transmit between ground units and air units.In the process of the communication,because the information may be transmitted from one system to another system,through several times of relay request and transmission,information transmission will be seriously delayed so that chances in the battle may be lost.This thesis analyzed and studied the processes of close air support organization and the characteristics of Ad Hoc self-organization network.Based on Ad Hoc network,we studied the access protocol and routing protocol of air and ground nodes in the high-speed mobile environment.Through using close air support system and data link system to simulate information interaction in the network to receive more packets,the efficiency of the network channel is increased.By setting up central control node in the network,the security and invulnerability of the network is enhanced,and the segmentation and merging of the whole network is achieved.Each traffics will be assign different priorities,by replacing the node priority,so that the high-priority traffic transmission can be guaranteed in order to achieve differentiation demand of the military network.Using OPNET simulation software to simulate the information exchange of the close air support in different scale application scenarios,Analyzed the time of nodes join into network,End-End delayed and loss-rate in different priority with the change of traffic load in each of condition.And explained this network system has the feasibility and superiority in practical application in order to contribute to close air support system in the joint operation system of our army.