WANG Ning-yuan,LIU Liang,CHEN Dong,et al.A Low Time Complexity Segment Routing Approach for Multi-Commodity Traffic Flow in Mega LEO Constellation[J].ACTA ELECTRONICA SINICA,2021,49(11):2124-2132.
WANG Ning-yuan,LIU Liang,CHEN Dong,et al.A Low Time Complexity Segment Routing Approach for Multi-Commodity Traffic Flow in Mega LEO Constellation[J].ACTA ELECTRONICA SINICA,2021,49(11):2124-2132. DOI: 10.12263/DZXB.20201335.
A Low Time Complexity Segment Routing Approach for Multi-Commodity Traffic Flow in Mega LEO Constellation
The LEO mega-constellation network with inter-satellite links faces serious network congestion when multi-commodity traffics return to a limited geographical area from all over the world
which can be alleviated by centralized traffic planning. However
the computing time cost of large-scale network planning cannot meet the dynamic requirements of LEO constellation. Therefore
this paper proposes a low complexity Multi-Commodity Flow Segment Routing (MCFSR) algorithm
which divides the constellation-ground network into two zones according to different link payload
and balances between accuracy and complexity of the planning algorithm in each zone
so as to reduce the overall time complexity. Meanwhile
for the planning algorithm
this paper proposes an Improved Fully Polynomial Time Approximation (IFPTA) algorithm with adjustable precision and complexity for routing programming in each zone
which improves the planning accuracy without changing the computational complexity. Simulation results show that the total throughput of multi traffic backhaul programmed by proposed MCFSR algorithm approaches the optimal
with the time complexity far less than other similar algorithms.
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references
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