Zhang Xue-jun

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Required Navigation Performance was envisaged by ICAO as a means to avoid the inflexibility and slow changability of equipment mandates for airspace operation. It is an advanced tool in air traffic control, and will replace the current navigation system. Therefore, a new collision risk model related to RNP is required to be established. This paper present a(More)
The QoS problem is introduced in this paper firstly, then two models for IP QoS are analyzed, they are integrated services architecture model (IntServ) and differentiated services architecture model (DiffServ) respectively. Based on the analysis, an improved ATN network structure-using IP QoS architecture DiffServ in ATN is proposed. This paper also(More)
Based on the deeply research on the VDLM2 protocol, this paper does research on the air-ground IP/VDLM2 communications system. Then the OPNET Modeler software is used to model the above system and the performance of the network is analyzed, including end-to-end data link layer delay, throughput and percentage of lost packets. The simulation and analysis of(More)
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