DDIL & Edge Operations

Disconnected, Disrupted, Intermittent, and Limited bandwidth (DDIL) operations are first-class capabilities in SDL, not afterthoughts or degraded modes. The platform is designed from the ground up to operate reliably when network connectivity is constrained, unreliable, or completely absent.

Bandwidth-Aware Streaming

SDL implements message priority tiers with bandwidth-aware streaming to ensure that the most critical data reaches its destination first:

  • Messages are assigned to priority tiers based on data type and operational importance.

  • Configurable bandwidth thresholds define how much available bandwidth each priority tier receives.

  • Higher-priority data (e.g., threat warnings, time-sensitive operational updates) is transmitted first, consuming available bandwidth before lower-priority traffic.

  • Lower-priority data is queued until sufficient bandwidth is available, ensuring that critical messages are never delayed by bulk transfers.

Disconnection Handling

The platform handles connectivity loss gracefully, with no operator intervention required:

  • Automatic local caching — When bandwidth drops below a configurable threshold, the node caches outbound data locally and continues normal operations against its local data store.

  • No data loss — Connectivity interruptions do not result in lost messages or dropped updates. All data is persisted locally until it can be transmitted.

  • Automatic sync on reconnection — When connectivity is restored, the node pulls missed updates from the mesh and pushes locally accumulated changes, restoring consistency without manual intervention.

  • Backfill snapshots — Nodes that have been disconnected for an extended period receive a targeted snapshot to bring them up to the current state efficiently, rather than replaying the full change history.

Performance Validation

SDL has been validated across a wide range of bandwidth and latency conditions:

Condition Validated Performance

Full bandwidth (200 Mbps / 25ms)

Nominal throughput with full mesh consistency

Degraded bandwidth (down to 0.01 Mbps / 600ms)

Priority-based data delivery maintained, lower-priority data queued

40-node mesh at degraded bandwidth

Sustained 20,000+ entities across the mesh

Partition recovery

Full consistency restored in 10—​15 seconds after partition heals

Single Software Baseline

A single software baseline runs across all deployment environments:

  • The same container image runs in cloud, on-premise, tactical edge, and autonomous platform deployments.

  • Runtime behavior adapts to available resources and connectivity — a cloud instance with abundant bandwidth and compute uses the same software as a ruggedized edge device with constrained resources.

  • Operators use an identical interface regardless of deployment scale, eliminating the need for environment-specific training or procedures.

This approach ensures that capabilities validated in one environment are available in every environment, and that software updates are tested and deployed through a single pipeline.