Spectrum-Licensing-Gated Probing

Mechanism

A probe-issuance request entering the architecture carries a probe specification: the emitting unit's identity, the proposed center frequency, occupied bandwidth, peak and average effective isotropic radiated power, modulation class, geographic emission scope (typically a bounding region or a propagation-model-derived contour), and the proposed time window. The probe-admissibility evaluator queries the spectrum-credential store for license attestations whose coverage envelope contains the entire probe specification. A license attestation is itself a credential: it carries the issuing authority's identifier, the licensee identifier, the licensed frequency band, power and emission limits, geographic coverage, validity interval, and any conditions of use (channel-keep-out lists, dynamic-coordination obligations, secondary-user yield rules).

The evaluator admits the probe only when at least one license attestation envelopes the probe specification along every regulated dimension simultaneously: frequency containment, power-limit compliance, geographic containment, temporal containment, and condition-set satisfaction. Any failure produces a structural rejection: the probe is not transmitted, the rejection is signed by the gating authority and committed to the audit log, and the requesting unit receives a typed failure result identifying the offending dimension. Where multiple license attestations partially cover the request, the architecture supports composition: a probe may be admitted under the union of attestations if the attestations are jointly held by the requesting authority and their combined coverage envelopes the request, with each contributing attestation recorded in the admission lineage.

Successful admission produces an emission credential bound to the specific probe instance, carrying a bounded grant identifier that downstream RF transmit pipelines verify before keying the transmitter. The emission credential expires at the end of the granted time window or upon revocation by the gating authority (for example, when an interference complaint is received from a higher-priority licensee). Revocation propagates through the same channel as license issuance, structurally terminating the grant before the original window expires.

The gating evaluator is constructed as a pure function over the probe specification and the resolved set of license attestations: the same inputs always produce the same admissibility decision, and the decision is cryptographically reproducible from the audit-log entry alone. Determinism is a structural requirement because admissibility decisions are subject to post-hoc audit by the issuing spectrum authority, and the authority must be able to replay the decision without access to the live evaluator state. Side effects of the evaluator — the audit-log write, the emission-credential issuance, and any outbound coordination message — are committed under a single atomic transaction that either commits entirely or rolls back without keying the transmitter. Partial commit states are not reachable by construction, so a probe admitted to the audit log is always also a probe admitted to the transmit chain, and a probe rejected at any step never reaches the power amplifier.

Operating Parameters

Frequency containment is evaluated against the licensed band with a configurable guard-band margin, typically 0.1% of channel bandwidth or 1 kHz, whichever is greater. Power-limit compliance compares both peak and time-averaged emission against the license-specified maxima, with an architecture-default 1 dB safety margin to accommodate transmit-chain calibration uncertainty. Geographic containment uses a propagation model parameterized by terrain, antenna pattern, and atmospheric conditions to compute the predicted -120 dBm/MHz contour and tests that the contour falls inside the licensed coverage region; the model identifier and parameter set enter the admission lineage so post-hoc re-evaluation against improved models is possible.

Temporal containment requires the probe time window to fall strictly inside the license validity interval with a configurable approach margin, typically 30 seconds, before license expiry. Condition-set evaluation iterates the license's enumerated conditions: channel-keep-out lists are intersected against the probe band; dynamic-coordination obligations trigger an outbound coordination query whose response is itself credentialed; secondary-user yield rules are evaluated against current primary-user activity reported by the spectrum-sensing fabric. License attestations are cached locally with a maximum staleness parameter (typically 60 seconds for tactical operations, 5 minutes for civilian operations) beyond which the cache is invalidated and re-fetched.

Audit retention is configured per regulatory regime. Representative retention windows are 30 days for routine probes under FCC Part 15-equivalent regimes, 1 year for licensed-band probing under FCC Part 90-equivalent regimes, and indefinite retention for defense-coordinator-gated probing.

Admissibility decisions are bounded in latency to permit real-time probe scheduling: representative implementations target a 95th-percentile gating decision time below 10 milliseconds for cached license attestations and below 250 milliseconds when attestation refresh is required. Emission-credential issuance includes a unique grant identifier, a transmit-chain-bound nonce, and a key-derivation parameter that the transmit chain feeds into a hardware MAC verifier prior to keying the power amplifier. Grant identifiers are recorded both in the audit log and in a short-window emission-credential registry permitting concurrent revocation across distributed transmit chains; representative registry sizes are 10000 active grants per square kilometer of operating region with sub-second propagation of revocation messages.

Alternative Embodiments

In a first alternative embodiment, the architecture integrates with a Citizens Broadband Radio Service (CBRS-class) Spectrum Access System through a credentialed adapter: SAS grant responses are translated into license attestations consumable by the gating evaluator, and SAS heartbeat obligations are satisfied automatically while the emission credential is live. In a second alternative embodiment, the gating evaluator operates against a dynamic-shared-spectrum coordinator that issues short-lived attestations (sub-second to seconds) for opportunistic probing in bands where primary-user protection is enforced via incumbent sensing.

A third alternative embodiment supports federal-civil shared bands by composing two attestation chains — a federal coordinator chain and a civil regulator chain — and admitting only requests envelopes by the intersection of both. A fourth embodiment supports cross-jurisdictional probing for platforms operating near international boundaries, gating against the union of attestations from each jurisdictional authority and rejecting any request whose predicted emission contour crosses a boundary into a jurisdiction lacking coverage. A fifth embodiment realizes the gating decision in tamper-evident hardware on the transmit chain, with the emission credential cryptographically bound to a hardware key such that no software bypass can key the transmitter without a valid grant.

A sixth embodiment supports emergency-override probing under credentialed exception authority: a separate exception attestation, signed by a designated emergency authority and carrying its own time and scope envelope, admits probes that would otherwise fail the standard license-attestation evaluator. Exception attestations are recorded in the audit log under a distinct record type and are subject to expedited review by the issuing authority post-event. A seventh embodiment supports passive license-monitoring mode in which the gating evaluator runs over candidate probes generated by the mesh's planning subsystem without keying the transmitter, producing a forecast of which planned probes will fail admissibility under the currently held attestations. The forecast feeds back into mission planning so that infeasible probes are reformulated or replaced before the transmit window opens, reducing operational latency caused by last-minute admissibility failures during time-critical operations.

Composition With Other Primitives

Spectrum-licensing gating composes with the governed-active-probe primitive: it is the spectrum-domain specialization of the broader active-probe admissibility framework. It composes with the credential primitive (license attestations are standard credentials), with the lineage primitive (admission decisions and rejections enter the audit log), and with the witness primitive (license attestations are issued by recognized spectrum authorities acting as witnesses to regulatory authorization).

It composes with environmental-sensing primitives by gating only the active emission step; passive sensing of the same RF environment proceeds without spectrum-licensing review since passive reception is not regulated under the same framework. It composes with the cascade-propagation step through the spectrum-class edge of the credentialed topology graph: an emission credential's revocation can be modeled as a cascade source whose downstream effects on dependent units are computed by the standard cascade evaluator. It composes with adversarial-action differentiation: a request rejected at the gating stage that exhibits patterns of deliberate jurisdictional probing is escalated for adversarial-intent review rather than being treated as an isolated configuration error.

Distinction From Prior Art

Spectrum-licensing-gated probing is structurally distinct from unlicensed-spectrum operation under FCC Part 15 and equivalent rules, in which compliance is assured by hardware certification of the transmitter and no per-emission license check occurs. It is distinct from conventional licensed-band radio operation, in which the licensee's compliance with their license is enforced administratively rather than gated structurally per emission. The disclosed mechanism makes the per-emission license check a structural admissibility decision in the data path of probe issuance.

It is distinct from CBRS Spectrum Access System interactions in their conventional form: a CBRS device queries SAS for a grant and then operates within the grant, but the SAS interaction is not embedded in a broader credentialed-attestation framework that also covers non-CBRS bands, military-coordinated bands, and cross-jurisdictional operation through a unified admissibility predicate. The disclosed architecture treats SAS grants as one source of license attestations among many, all flowing through the same gating evaluator. It is distinct from software-defined-radio policy engines in academic and military research literature, which have proposed declarative policy specifications for transmitters but have not, to the inventor's knowledge, integrated a credentialed multi-authority license-attestation model with a structural per-probe admissibility predicate, hardware-bound emission credentials, and cascade-graph composition.

Disclosure Scope

This disclosure encompasses any mesh architecture in which active RF probe issuance is structurally gated by credentialed spectrum-license attestations evaluated against the probe specification along frequency, power, geographic, temporal, and condition dimensions; in which gating decisions and rejections enter a tamper-evident audit lineage; and in which emission credentials issued upon admission are cryptographically bound to specific probe instances and revocable independently of license expiry. The scope is intended to cover implementations across spectrum-authority regimes (FCC, OFCOM, ITU member national regulators, defense spectrum coordinators), license-source mechanisms (static administrative licenses, SAS-class dynamic grants, opportunistic-coordinator short-lived attestations, federal-civil shared-band intersections), and emission platforms (ground-fixed, vehicular, airborne, maritime, space). Specific authorities, license-source mechanisms, and platforms are recited as illustrative embodiments and do not limit the claims.

The disclosure further supports claims directed to: (a) the gating evaluator as an isolable software-or-hardware artifact whose admissibility predicate is reproducible from logged inputs alone; (b) the emission-credential format and the cryptographic binding between credential and transmit-chain hardware key; (c) methods of composing license attestations from multiple authorities under intersection, union, or hybrid composition rules selected per regulatory regime; (d) methods of revoking active emission credentials under cascade-graph propagation from license-revocation events upstream; and (e) methods of operating a mesh in which all active RF emissions are admitted only through the gating predicate, with passive sensing proceeding under a separate non-emitting admissibility framework. The disclosure intends to read on any system whose architecture exhibits the structural-admissibility property described above, irrespective of the deployment scale, the population of contributing licensees, or the specific cryptographic primitives used to bind credentials to hardware.