Polynomial Time Algorithm for Multi-Beam SS/TDMA Satellite Communications Scheduling Problem with Frequency-Hopping Ground Stations

Title & Authors
Polynomial Time Algorithm for Multi-Beam SS/TDMA Satellite Communications Scheduling Problem with Frequency-Hopping Ground Stations
Lee, Sang-Un;

Abstract
The time slot assignment problem (TSAP) or Satellite Communications scheduling problem (SCSP) for a satellite performs $\small{n{\times}n}$ ground station data traffic switching has been known NP-hard problem. This paper suggests $\small{O(n^2)}$ time complexity algorithm for TSAP of a satellite that performs $\small{n^2{\times}n^2}$ ground station data traffic switching. This problem is more difficult than $\small{n{\times}n}$ TSAP as NP-hard problem. Firstly, we compute the average traffic for n-transponder's basic coverage zone and applies ground station exchange method that swap the ground stations until all of the transponders have a average value as possible. Nextly, we transform the D matrix to $\small{D_{LB}}$ traffic matrix that sum of rows and columns all of transponders have LB. Finally, we select the maximum traffic of row and column in $\small{D_{LB}}$, then decide the duration of kth switch mode to minimum traffic from selected values. The proposed algorithm can be get the optimal solution for experimental data.
Keywords
Multi-beam;Duplicated coverage;Time slot;Makespan;Switch mode;
Language
Korean
Cited by
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