Abstract
Aiming at the complex structure of the space information networks (SIN) and the dynamic change of network topology, in order to design an efficient routing strategy, this paper establishes a SIN management architecture based on Software-defined Networking (SDN). A routing algorithm flow of the spatial information network based on a snapshot sequence is designed. For different spatial tasks with different Quality of Service (QoS) requirements, the concept of integrated link weight is proposed. The Warshall–Floyd algorithm is used to design the optimal routing strategy. A Task-oriented Bandwidth Resource Allocation (TBA) algorithm is proposed for multiple spatial tasks in the same link. Simulation results show that the algorithm can effectively guarantee the priority transmission of important tasks and avoid the unnecessary waste of bandwidth resources.
Highlights
The space information networks (SIN) is a network system that acquires, transmits, and processes spatial information in real time using various spatial platforms as carriers [1]
In order to improve the efficiency of the SIN and satisfy the transmission requirements of different spatial tasks, this paper studies the multi-topology routing algorithm based on Quality of Service (QoS) routing algorithm
(1) The SIN management architecture based on Software-defined Networking (SDN) is established, which realizes the unified management of spatial resources and provides sufficient storage and computing space for the routing algorithm of the SIN based on snapshot sequence
Summary
The space information networks (SIN) is a network system that acquires, transmits, and processes spatial information in real time using various spatial platforms (such as synchronous satellites or medium and low-orbiting satellites, stratospheric balloons and manned or unmanned aerial vehicles) as carriers [1]. (1) The SIN management architecture based on SDN is established, which realizes the unified management of spatial resources and provides sufficient storage and computing space for the routing algorithm of the SIN based on snapshot sequence. (2) Satellite nodes in the SIN run fast, so their topology is highly dynamic According to this topological information, the SDN controller can perform real-time and efficient operation in order to make the network run efficiently and increase the stability of the network. Combined with the idea of SDN, the ground SDN controller has the information and real-time data flow of all satellite nodes in the whole network In this way, the SDN controller can find the optimal transmission path according to the data flow distribution of the whole network, which is conducive to saving the bandwidth resources of satellite communication and avoiding the cost. (6) The global network view of the controller and the open northbound interface in SDN can realize automatic and rapid configuration and response for different dynamic requirements of tasks, and meet the dynamic and fast networking requirements of the SIN
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