Throughput Performance Analysis Of AOS Protocol And OPNET Modeling And Simulation

Advanced orbiting system (AOS) is the product of the standardization of space data system and the combination of TT&C and communication. AOS protocol brings the field of the space C&T tremendous changes. Our aerospace projects should implement the AOS protocol to join the world aerospace club.In this paper we analyze the characteristics of the source of space data system and give three types of source packet model; The relationship between M_PDU multiplexing efficiency and transfer frame completion waiting time has been educed by the analysis of the process of packet multiplexing and frame completion; Then we analyze several key aspects that affect the protocol throughput performance metric to formulate the throughput performance metric of AOS packet service.In this paper, we create the network, node and process model using OPNET software to simulate throughput performance of AOS packet service, and choose various combinations of source packet length, transfer frame length and channel error rate to form different simulation scenarios. By analyzing the throughput-packet length, throughput-frame length simulation curves at different channel BER we get the optimal packet length and frame length configurations, and give some advice for the optimization of protocol configuration parameters according to throughput performance metric; The complete node and process model of AOS protocol have been built by OPNET software, and a simple network scenario has been built to simulate and verify the validation of the protocol model.In this paper we integrate the theoretical analysis with OPNET modeling and simulation to analyze the key factors that affect the throughput performance metric of the AOS protocol. With the throughput curve we optimize the protocol configuration to direct the applications of the protocol to space missions. The protocol OPNET models built here could be reused for the simulation of throughput performance of AOS bitstream, virtual channel access and other services, for the simulation of delay, channel utilization, and other AOS protocol performance metrics, or for the simulation of the performances of high layer protocols (space network layer, transport layer) based on the AOS space data link protocol.