Abstract
Tracking and Data Relay Satellite System (TDRSS) is a space-based telemetry, tracking, and command system, which represents a research field of the international communication. The issue of the dynamic relay satellite scheduling, which focuses on assigning time resource to user tasks, has been an important concern in the TDRSS system. In this paper, the focus of study is on the dynamic relay satellite scheduling, whose detailed process consists of two steps: the initial relay satellite scheduling and the selection of dynamic scheduling schemes. To solve the dynamic scheduling problem, a new scheduling algorithm ABC-TOPSIS is proposed, which combines artificial bee colony (ABC) and technique for order preference by similarity to ideal solution (TOPSIS). The artificial bee colony algorithm is performed to solve the initial relay satellite scheduling. In addition, the technique for order preference by similarity to ideal solution is adopted for the selection of dynamic scheduling schemes. Plenty of simulation results are presented. The simulation results demonstrate that the proposed method provides better performance in solving the dynamic relay satellite scheduling problem in the TDRSS system.
Highlights
Tracking and Data Relay Satellite System (TDRSS) is a system which can provide service of data relaying, continuous tracking, and TT&C for the spacecrafts of LEO (Low Earth Orbit) and MEO (Middle Earth Orbit) and between spacecrafts and ground stations
The detailed process of the dynamic relay satellite scheduling consists of two steps: the initial relay satellite scheduling and the selection of dynamic scheduling schemes
The performances of the proposed dynamic scheduling method artificial bee colony (ABC)-TOPSIS are shown in the following simulation results
Summary
Tracking and Data Relay Satellite System (TDRSS) is a system which can provide service of data relaying, continuous tracking, and TT&C (telemetry, tracking, and command) for the spacecrafts of LEO (Low Earth Orbit) and MEO (Middle Earth Orbit) and between spacecrafts and ground stations. The tasks set is likely to change, which causes the variation of the relay satellite scheduling scheme In this case, the dynamic scheduling scheme needs to replace the initial scheduling scheme. A new efficient scheduling algorithm ABC-TOPSIS based on artificial bee colony (ABC) and technique for order preference by similarity to ideal solution (TOPSIS) is first proposed, in order to solve the dynamic relay satellite scheduling. The artificial bee colony (ABC) algorithm is utilized to solve the initial relay satellite scheduling. TOPSIS is applied to solve the selection of dynamic scheduling schemes when the tasks set proposed by user satellites has changed.
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