Overview
ISO/IEC 21558-2:2023 - "Telecommunications and information exchange between systems - Future network architecture - Part 2: Proxy model-based quality of service" specifies the architectural aspects of Future Network Quality of Service (FNQoS) using an FNProxy (proxy) model. It defines the FNQoS concept, a reference architectural model for an FNQoS system, and usage scenarios (including human-centric use, inter-FNQoS interaction and inter-working with legacy networks). The document takes into account requirements from ISO/IEC TR 29181-8 and complements protocol mechanisms described in related parts (e.g., ISO/IEC 21559-2).
Key topics and technical requirements
- FNProxy model: Defines software or device elements (FNProxies) that both provide service and request services in an FNQoS system.
- Three engines inside an FNProxy:
- Perception engine - senses requirements and environmental changes.
- Negotiation engine - matches perceived needs to capabilities and signs service contracts or forwards requests.
- Execution engine - enforces contracts and may generate further requirements.
- Bidirectional Service (Bi-S): A core interaction reference point enabling concurrent, synchronized, bidirectional exchanges between FNProxies; treated as an operator for interaction semantics and harmony measurement.
- FNQoS system modes: Distributed mode (FNQoS functions distributed across FNProxies) and central mode (centralized FNQoS information system).
- Harmony relations:
- FHR (FNProxy Harmony Relation) for pairwise interaction assessment.
- MFHR (Multiple FNProxies Harmony Relation) for composed interactions among three or more FNProxies.
- Architectural constructs: FNProxy interfaces, domains (functional classification), engines, and a reference model for system composition and interoperation.
- Operational concerns: Negotiation, binding, registration and administration of FNProxies; applicability to AI-enabled networking (AIEN) and evolution paths for FNQoS.
Applications and who should use this standard
- Telecommunications architects and network engineers designing future network architectures and QoS systems.
- Vendors and integrators building AI-enabled networking (AIEN) components or proxy-based QoS services.
- Protocol designers and system implementers developing Bi‑S interaction mechanisms and FNProxy engines.
- Research groups and standardization bodies working on next-generation QoS, interoperability, and migration strategies for legacy networks.
- Solution owners needing a reference architecture for distributed vs. centralized FNQoS deployments.
Related standards (informative)
- ISO/IEC TR 29181-8 (requirements for future network QoS)
- ISO/IEC 21559-2 (related proxy-model QoS protocols and mechanisms)
- ISO/IEC 19501 and ISO/IEC/IEEE 42010 (architecture description and analysis guidance)
Keywords: Future Network QoS, FNProxy, FNQoS system, proxy model-based quality of service, Bidirectional Service, Bi‑S, AI-enabled networking, network architecture, reference architecture, FNProxy Harmony.