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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (7): 2329-2339.doi: 10.7527/S1000-6893.2015.0071

• Electronics and Control • Previous Articles     Next Articles

Link assignment problem of navigation satellite networks with limited number of inter-satellite links

YAN Hongcheng, ZHANG Qingjun, SUN Yong   

  1. Institute of Spacecraft System Engineering, China Academy of Space Technology, Beijing 100094, China
  • Received:2014-08-22 Revised:2015-03-11 Online:2015-07-15 Published:2015-03-13
  • Supported by:

    National Natural Science Foundation of China (91438102)

Abstract:

The link assignment problem of navigation satellite networks is investigated where the number of inter-satellite links is very limited and both crosslink ranging and crosslink communication requirements have to be accommodated. Firstly, the characteristic of navigation satellite networks is analyzed and a topology handling scheme based on finite state automaton (FSA) is presented. Then, the link assignment problem of navigation satellite network is formulated as a multi-objective optimization problem with the crosslink ranging as a constraint and crosslink communication delay as the optimization object. Finally, a local search algorithm based on first improvement (FI) and a heuristic optimization algorithm based on simulated annealing (SA) are presented respectively to solve the formulated link assignment problem. A new link assignment generation method based on branch and exchange strategy is also proposed. Simulation results show that the network delay performances of the optimized link assignment obtained with FI and SA are better than the initial link assignment. And the performance of SA is better than FI. The probability of obtaining a link assignment with good delay performance is higher when the state duration of FSA is small.

Key words: navigation satellite network, link assignment, multi-objective optimization, first improvement, simulated annealing, network delay

CLC Number: