Direct to Cell Satellite

LEO satellite networking for direct-to-cell and satellite IoT: predictive handover, orbital scheduling, pass-aware delivery, jurisdictional policy, and satellite-edge learning. New: Predict, Don't React, ephemeris as lead time for the Direct-to-Cell control plane.

Direct to Cell Satellite

SkyHandover

Cross layer proactive handover for the LEO satellite edge.
8.3 second lead timeF1 0.92334.2% throughput lift

SkyHandover predicts direct to cell handovers from protocol invariants rather than signal strength alone. It uses cross layer features at the RAN edge to act before the satellite transition disrupts throughput.

predict the handover from protocol invariantssatsat8.3s leadRAN edgeUEcross-layer invariants → act early
Direct to Cell Satellite

SkyWindow

Pass aware deferral for dual orbit satellite IoT.
2.5 to 17 points PDR gainwithin 7% of oracle14 day ephemeris tolerance

SkyWindow holds IoT packets for better upcoming satellite windows instead of sending immediately into poor geometry. It uses orbital predictability to improve reliability without changing satellites or gateways.

hold the packet for a better orbital windowpoornowgood+Δtpktorbital predictability, no satellite or gateway change
Direct to Cell Satellite

Adaptive Orbital D2D

Dynamic LEO, GEO, and hybrid path selection for satellite IoT.
3x capacity improvement62% lower tail latency31% lower energy

Adaptive Orbital D2D chooses among LEO, GEO, and hybrid paths based on Doppler, load, and application needs. It makes orbital choice a runtime optimization rather than a static architecture decision.

orbital path as a runtime decisiondeviceselectDoppler · loadLEOGEOhybrid
Direct to Cell Satellite

D2D Decide

Device cooperation for direct to cell satellite gaps.
6.2 dB average gain34% failures recoveredsub millisecond inference

D2D Decide determines when nearby phones should relay for a device with weak satellite signal. It avoids unnecessary discovery overhead while recovering links that would otherwise fail.

borrow a neighbor's link when yours is weaksatelliteweak UEweakneighbors relayrelay onlywhen it helps
Direct to Cell Satellite

PathLink

Predictive LEO handover for displacement corridors.
73% fewer failures2.6x throughput12,000 users modeled

PathLink precomputes handover sequences for users moving through humanitarian corridors. It combines satellite trajectory prediction with mobility patterns to keep emergency connectivity stable.

precompute the handover sequence along a corridorsatsatsathandover sequence precomputeddisplacement corridoruser moves; next satellite already chosen
Direct to Cell Satellite

PredictAct

A predict then act control plane for direct to cell.
4.3 minute application lead time14.2 minute policy lead timeshared orbital primitive

PredictAct argues that direct to cell networks should use public orbital trajectories across radio, application, and policy planes. The same propagator can expose lead time at multiple layers.

one orbital propagator, three planesorbitalpropagatorradio planeapplicationpolicy planeseconds4.3 min14.2 min
Direct to Cell Satellite

Predictability Tax

Cost accounting for LEO network predictors.
1460x energy spread238x p99.9 latency spreaddeployment budget lens

Predictability Tax measures the energy, latency, and memory cost of handover predictors that report similar accuracy. It shows that predictor choice is under specified unless deployment cost is reported with F1.

same accuracy, very different deployment costF1 ≈ 0.92 for all three predictorspredictor Apredictor Bpredictor Cenergy / latency spread up to 1460×report cost alongside F1
Direct to Cell Satellite

SpaceRegulate

Jurisdiction aware data sovereignty for LEO networks.
17.4 minute lead time6.6 ms policy commit38% conflict pairs

SpaceRegulate pre stages legal policy before a satellite crosses jurisdiction boundaries. It turns predictable orbital movement into a policy handover primitive for space data planes.

stage the policy before the boundary crossingjurisdiction Ajurisdiction Bsatin Bpolicy committed17.4 min before crossingorbital movement becomes a policy-handover primitive
Direct to Cell Satellite

FedSat LAM

Hierarchical federated learning for satellite foundation models.
85% less communication95% less energy87.6% accuracy

FedSat LAM enables large AI models on resource constrained satellites using multihop offload, tree aggregation, and parameter efficient tuning. It keeps more learning near the data produced in orbit.

keep the learning near the data produced in orbitleaf satellitesgroundtree aggregationPEFT tuningmultihop offload
Direct to Cell Satellite

SafeZones

Privacy preserving trajectories in space 5G networks.
85 to 40% attack success90% utilitysub 10 ms latency

SafeZones protects mobility traces using sensitive location discovery, differential privacy, and synthetic trajectory generation. It balances trajectory privacy with service utility at the edge.

protect the trace, keep the service usefulreal trajectoryprivacyDP · syntheticprotectedattack success 85% → 40%, utility ~90%sensitive-location discovery + synthetic generation