MF-TDMA Scheduling Algorithm for Multi-Spot Beam Satellite Systems Based on Co-Channel Interference Evaluation
TLDR
Two novel interference-aware scheduling algorithms for a DVB-RCS2 return uplink are presented and designed on the basis to be executed in real time on a fixed SuperFrame period basis.Abstract:
Very high throughput satellites (VHTS) are the new trend in satellite communications systems in order to satisfy the increasing demand for both higher throughput and ubiquitous connectivity. Implementing an IP interactive network over a VHTS would enable the satellite to compete with terrestrial networks by offering ubiquitous added value services for end-user traffic. Even so, the simulations presented in this paper show that a 30% of throughput can be lost due to co-channel interferences. In existing interactive satellite networks such as REDSAT or AmerHis, the return uplink transmissions are inherently benefited from the MF-TDMA scheduling to mitigate the co-channel interferences present in VHTS. In such networks dynamic resource assignation (DAMA) is executed at each SuperFrame period (<100 ms). Therefore, any feasible optimization on the scheduling shall be performed in real time. In this paper, two parallel problems are faced at the same time: co-channel interference mitigation and real time scheduling. In particular, two novel interference-aware scheduling algorithms for a DVB-RCS2 return uplink are presented. Despite other previous works, the proposed algorithms are designed on the basis to be executed in real time on a fixed SuperFrame period basis. The performance assessment of the proposed algorithms is carried out through system-level simulations based on realistic satellite scenarios and interactive traffic models using DAMA in real time.read more
Citations
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SatSysSim: A Novel Event-Driven Simulation Framework for DVB/RCS2 Performance Characterization
TL;DR: A novel simulation framework capable of providing a detailed assessment of a satellite communication’s network performance in realistic scenarios is presented, which employs an event-driven methodology, models the communications network as a DES (discrete event system), and focuses on the return link of the DVB-RCS2 standard.
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Модель функционирования канала спутниковой связи в условиях искажений служебной части кадров нестационарными помехами
TL;DR: It is shown that non-stationary interference, which are short noise pulses that do not affect the information part of the frame due to reparation by correction codes, can significantly reduce the reception quality due to disruption of frame synchronization and distortion of service information about the signal-code structure and frame length.
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