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Satellite network users want to unify different satellites to enhance the stability of the satellite networks and use different communication networks to feed different applications. Unfortunately, the state of affairs is that different applications need to use several different application programming interfaces and to design protocols on how and when to use a specific communication network. This...
In this paper, we introduce the architecture of LEO satellite network first of all, and then conduct a research on a classical distributed algorithm "Datagram Routing Algorithm"(DRA) for LEO satellite network. Our core work focus on optimizing the DRA and giving a corresponding re-routing strategy for optimized algorithm. Finally some simulation experiments evaluating the performance of...
The performance of satellite networks largely depends on their routing algorithm. Existing routing algorithms for satellite networks usually are not quite adaptive or have the disadvantage of a large consumption in both computation and storage resources. In this paper, we propose a novel routing algorithm based on dynamic clustering for LEO satellite networks. By dynamic forming cluster of the satellite...
1/3 Subharmonic resonance of current-carrying conductor subjected to harmonic excitation system is studied. The nonlinear equation of the system is established by means of dynamics theory. According to the method of multiple scales for nonlinear vibrations the approximation solution of 1/3 Subharmonic resonance of the system is obtained. Numerical analysis results show that the amplitude changed with...
To satisfy the multiple QoS constraints in different services, we divide a QoS routing problem into some multicast routing problem oriented the types of QoS service callings. Every multicasting routing problem is a Steiner tree problem. In this paper, we propose a dynamic QoS routing mechanism (DQ) to support multiple Steiner trees. We also propose a protocol to distinguish between the types of services...
Dynamic topologies and constrained recourses are two main characters of satellite networks. These characters require a specialized and efficient routing algorithm. In this paper, a QoS routing algorithm based on PEC multi objective optimization method is proposed to find paths that satisfy all user QoS requirements efficiently. A new routing scheme is also developed to reduce the computing load in...
Routing scheme plays a critical role in determining the performance and reliability of a satellite network. Since the resources in satellite networks are constrained, a major challenge in satellite network routing is how to find paths that satisfy all user QoS requirements in a low cost. In this paper, a multi-QoS optimization routing scheme is proposed to solve this problem in hierarchical satellite...
With the development of the space technology, the low performance of the on-board computing becomes a bottleneck of the satellite networks. To solve this problem, we proposed a new QoS routing scheme for LEO satellite networks based on ground station in this paper. This routing scheme is off-line and based on prediction. The most computing task of the routing scheme will be implemented on the ground...
In order to study on nonlinear vibration of RLC circuit, a mathematical model of RLC circuit with inductance nonlinearity and harmonic excitation is established by means of Lagrange-Maxwell equation. Based on the method of multiple scales for nonlinear vibration analysis, the first approximation solutions and corresponding to steady state solutions of the 1/3 subharmonic resonance system are obtained...
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