Spacecoin unveiled the technical architecture of SOLAR, a communications routing protocol for satellite internet data transmission, and Lumen, a billing and settlement layer for usage fees, on Sept. 2. The design separates routing from fee settlement, allowing multiple independent operators to participate in one network rather than relying on a single telecom operator. Users can choose data transmission paths and verify each operator’s contribution for settlement. A Spacecoin official said SOLAR establishes data routes and manages communications delivery, while Lumen measures each operator’s contribution and distributes the corresponding fees. The system is designed to connect infrastructure operated by different companies into one satellite internet network without a central operator deciding routes or settling usage fees.