Inter-layer Link Design for Resource-Constrained Double-Layered Satellite Network
Due to the relative motion of low-orbit satellites and high-orbit satellites, the inter-layer links (ILL) of double-layered satellite networks (DLSN) need to be dynamically switched, thus causing the satellite network topology changing dynamically. Traditional inter-layer link establishment strategy is low-orbit-centric which assumes that the number of ILLs equipped on high-orbit satellite is not limited. However, actual DLSNs are generally resource-constrained, such as weight and power. Thus the number of ILLs can be equipped on one satellite is limited. Therefore, traditional ILL establishment strategy is hard to apply in practice. In this paper, we first propose an ILL establishment strategy which is high-orbit-centric. We assume that high-orbit satellites have only one ILL and use this as a precondition to establish ILL. Then, the system snapshot performances of two ILL establishment strategies under two typical DLSNs constellation configurations, which are LEO/MEO and IGSO/MEO, are simulated and analyzed. Finally, since ILL establishment strategy which is high-orbit-centric can make the ILLs of some low-orbit satellites idle for some time, we point out that further research should be carried out about how to effectively use low-orbit satellite ILLs.
KeywordsInter-layer link design Double-layered satellite networks Higher-orbit-centric Simulation analysis
- 3.Chen, C., Eylem E., Akyildiz, I.F.: Satellite grouping and routing protocol for LEO/MEO satellite IP networks. In: Proceedings of the 5th ACM international workshop on Wireless mobile multimedia, pp. 109–116. ACM (2002)Google Scholar
- 7.Li, Y., Wu, J., Zhao, S., Deng, B., Miu, X.: A two-step synchronous handover scheme of optical inter-orbit links in LEO and MEO satellite network. Acta Electronica Sinica 45, 762–768 (2017)Google Scholar
- 8.Shi, W., Gao, D., Zhou, H., Xu, Q., Foh, C.H.: Traffic aware inter-layer contact selection for multi-layer satellite terrestrial network. In: GLOBECOM 2017, IEEE Global Communications Conference, pp. 1–7 (2017)Google Scholar
- 9.Yan, H., Guo, J., Wang, X., Zhang, Y., Sun, Y.: Topology analysis of inter-layer links for LEO/MEO double-layered satellite networks. In: International Conference on Space Information Network, pp. 145–158. Springer, Singapore (2018)Google Scholar