Aiming at the need of health evaluation of spaceborne modulation and demodulation equipment, a method of load health evaluation based on order relation analysis and entropy weight method was proposed, and membership function was introduced to solve the matching problem of equipment weight and health level. Firstly, the health index system of spaceborne modulation and demodulation equipment is established, and then the indicators are uniformly processed. The subjective weights of each index are determined by the method of order relation analysis and expert experience. By adding entropy weight method to the data features, the objective weight of each index is obtained, and the comprehensive weight is obtained by Lagrange multiplier method. Then the health membership function is obtained based on fuzzy set theory to make the comprehensive weight of each index match the health status evaluation results. Finally, the feasibility of the index system and evaluation method is verified by simulation experiments.
KEYWORDS: Network architectures, Reliability, Telecommunications, Satellites, Digital signal processing, Satellite communications, Demodulation, Control systems, Data processing
Network function virtualization technology provides the advantages of resource integration and flexible deployment for communication system, which has been widely used in ground equipment. With the demand of high reliability, intelligence and low cost for onboard integrated equipment becoming more and more urgent, onboard equipment puts forward new requirement for network function virtualization technology. The existing customized onboard equipment has a series of problems, such as poor universality, resource redundancy and high cost. In order to solve these problems, this paper proposes a resource pooling architecture based on high integration. This architecture can effectively improve the universality of onboard equipment. Through intelligent load management, this architecture can achieve flexible allocated, improve resource utilization rate and the reliability of system can be improved. The architecture has great practical value and theoretical significance for the future planning and development of onboard equipment.
With the rapid development of terrestrial IP network and mobile Internet, it is inevitable for satellite communication system to be compatible and realize IP networking communication. Limited by the performance of existing Aerospace high-level devices, the satellite communication system based on IP protocol has weak processing capacity of on-board routing protocol, the number of routing nodes that can be supported is limited, and the network scale is difficult to meet the rapidly growing application needs of users. For GEO broadband satellite IP network, this paper proposes a new system routing policy, which greatly reduces the overhead of on-board routing calculation by separating the routing calculation of ground user segment from that of space segment, Because the selection of processing chips used by ground user segment network nodes for routing calculation is not limited, ground user segment network nodes can be deployed on a large scale.
The combination of satellite optical switch and transmission can realize the direct switch of satellite optical data, and avoid the problem that it is difficult to realize the super large data capacity switch under the condition of limited processing ability of satellite electric devices. In this paper, the characteristics and application requirements of satellite network are analyzed deeply. By combing with the constraints of space environment, device selection, and engineering implementation, a multi-mode optical switching technology scheme of satellite network based on the optical burst switching system is proposed. The scheme can support the three modes of optical circuit switching, optical flow switching and optical burst switching at the same time. It is often suitable for satellite networks with limited resources of satellite to ground and inter satellite links. It needs to support the application environment of multiple service systems optical link multiplexing.
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