The Relay Network - FTL Communication Infrastructure
Classification: Interstellar Communication Infrastructure, Network Architecture
Domain: FTL Communication, Authentication, Coordination
Applies to: All relay nodes, corridor communication infrastructure, authentication hardware
1. Intermediation
The relay network carries FTL communication across interstellar and intergalactic distances. It enables the coordination that makes large-scale civilization possible: directives, authentication signals, queue scheduling, corridor slot negotiation, financial settlement, and the ambient information traffic of a multi-galaxy population.
The network is not a public utility. It is a tiered system. The authenticated tier - operated by the SMA - carries coordination traffic, financial settlement, and authenticated identity. The unauthenticated tier carries everything else: personal communication, commercial data, entertainment will be reprinted across four relay networks within 48 hours. Access to the authenticated tier is controlled by SMA registration. Enforcement is not by blocking access but by exclusion from civilization-speed processes - an unauthenticated actor can communicate, but cannot schedule a fabrication slot, book a corridor transit, or settle a contract in SMA-denominated Credits.
2. Constraints
FTL communication exists. It is not free. Bandwidth is limited, latency is non-zero and variable, and synchronization across intergalactic distances is unstable.
The bandwidth constraint is physical, not policy-based. An FTL channel can carry a finite information rate, and the total channel capacity across a given relay link is shared among all traffic on that link. During peak periods - corridor slot negotiations, financial settlement cycles, major coordination events - links run at capacity and traffic is prioritized. Routine personal communication across intergalactic distances is metered accordingly.
Latency is variable. A signal between Sol and the LMC might take minutes or hours depending on current link conditions, relay node loading, and routing. Real-time conversation across intergalactic distances is possible but expensive. Most communication is store-and-forward: messages are queued, transmitted when capacity is available, and delivered when they arrive. The experience is closer to email than to voice, and closer to postal mail than to email at the worst cases.
Synchronization is unstable across galaxies. The relay network maintains a distributed consensus about identity, authentication, and transaction ordering, but the consensus is eventually consistent, not strongly consistent. Two relay nodes at intergalactic separation may have different views of the current state for minutes to hours. The SMA's scheduling function operates on the assumption that perfect synchronization does not exist and designs around it - slots are booked with margins that account for synchronization uncertainty.
3. Nodology
A relay node is a physical installation: signal processing hardware, thermal management, precision-aligned antenna arrays, and the power infrastructure to run it all. Nodes are located at gravitationally stable points - Lagrange points, orbital resonances, or free-floating deep-space positions - where station-keeping requirements are minimal and the line-of-sight to neighboring nodes is stable over long periods.
Primary nodes are large installations, typically hundreds of meters across, with dedicated power from local swarm collectors or onboard reactors. Secondary and tertiary nodes are progressively smaller, serving as relays between primary nodes and local destinations. The full network comprises tens of thousands of nodes across the settled galaxies.
A node's physical form is determined by its thermal budget. FTL signal processing generates waste heat proportional to bandwidth. The heat must be rejected via radiators. The radiator array is the most visible feature of any relay node - large, flat panels extending from the node core, optimized for radiative surface area. The node looks like a radiator array with a signal processor attached, because thermally, that is what it is.
4. Decoherence
A signal passing through multiple relay hops accumulates distortion. The effect is measurable on single-hop links and significant on multi-hop chains. For data - text, numbers, contracts, scheduling information - error correction handles it. For the kind of high-bandwidth, low-latency signal that would be required for remote embodiment or uploaded mind transfer, the accumulated distortion over multiple hops is catastrophic.
This is why remote operation fails at scale. The relay network can carry directives: instructions, specifications, commands. It cannot carry enough information, fast enough, with low enough distortion, to run a biosphere, a fabrication complex, or a settled population remotely. You can supervise the LMC from Sol. You cannot run it from Sol. The relay is a management tool, not a replacement for local presence.
A version of yourself sent across the network - as an upload, a proxy, or an extended-duration remote embodiment - would accumulate relay compression artifacts at each hop. The divergence is measurable over short chains and severe over long ones. The arriving version would share your memories and capabilities but would not be you in any sense that matters to the person making the decision to send it. The practical consequence: travel still requires travel. The relay tells you what is happening. It does not put you there.
5. Credentialization
The SMA operates the authenticated tier as a coordination service, not as a government. Authentication is a technical function: a relay node verifies that a signal originates from a registered identity and routes it accordingly. An unauthenticated identity can use the unauthenticated tier without restriction. They cannot schedule fabrication priority, book corridor slots, or settle contracts in Credits - not because they are prohibited but because those functions require authentication, and authentication requires registration, and registration requires agreement to SMA protocols.
This is the enforcement mechanism that replaces physical sovereignty across most of settled space. A squatter on an unregistered body in M82 is not arrested. They are not authenticated, which means they cannot participate in civilization-speed processes. Over time, this amounts to the same thing as exclusion, without requiring anyone to show up with a weapon. The network is the enforcement layer. Exclusion from it is the penalty. The penalty is effective because participation in it is necessary for participation in the civilization at any scale beyond the purely local.
See also: #slime-world.md (FTL section, SMA section), solar-monetary-authority.md, logistics-layers.md