1 research outputs found
LEOS-assisted Inter-GEOS Communication via Distributed-storage Coding
We consider a space communication network consisting of Geosynchronous Earth
Orbit satellites (GEOSs) and Low Earth Orbit satellites (LEOSs). In case of no
direct communication link between two GEOSs, the data exchange between them is
through relay by the LEOSs. In particular, the source GEOS sends coded data to
multiple LEOSs based on the distributed storage framework. The destination GEOS
then retrieves certain amount of data from each LEOS for data reconstruction.
For the GEOS-LEOS downlink, a regenerating-code-based transmission scheme is
optimized to guarantee data reconstructability, where the transmission power
allocation to the LEOSs is proposed to minimize the total transmission energy.
We also consider the power allocation to minimize the total transmission time
given the total transmission energy. For the LEOS-GEOS uplink, a flexible
partial-downloading coding transmission scheme is proposed to guarantee data
reconstructability, where the joint uploaded-data size and power allocations
are proposed to minimize the total transmission energy or the total
transmission time. Extensive simulation results are presented to evaluate the
proposed algorithms and show that regenerating code can achieve lower
transmission energy and shorter transmission time for data regeneration than
conventional maximum-distance separable (MDS) code