Research on compatible strategy of VDES heterogeneous constellation based on DQN

doi:10.7523/j.ucas.2022.071

Abstract

Abstract: As heterogeneous VDES (VHF Data Exchange System) constellations use the same communication frequency and time division multiple access (TDMA) communication mechanism, a large number of co-channel interference is caused by slot conflicts in the overlapping area of constellations,reducing the communication quality. To tackle this problem, an inter-constellation compatibility strategy for deep Q-net (DQN) is proposed. Based on the VDES communication process, the ship station is set as the resource information transfer node, which enables the satellite to perceive the communication environment. On this basis, the resource allocation problem in the heterogeneous constellation scenario is modeled as a Reinforcement Learning (RL) problem, and a DQN-based slot resource allocation algorithm is proposed. By reconstructing the historical resource information and current resource information, the optimal slot resource allocation scheme is planned and the algorithm is iteratively optimized according to the results. Simulation results show that the proposed strategy can effectively enhance the communication performance.

Key words: VDES, DQN, satellite communications, interference avoidance, resource allocation

CLC Number:

TN92

WANG Xuefan, LI Zongwang, LIANG Xuwen. Research on compatible strategy of VDES heterogeneous constellation based on DQN[J]. Journal of University of Chinese Academy of Sciences, DOI: 10.7523/j.ucas.2022.071.

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