SDAP Header SFC Service Identifier for 5G Flow Classification
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Solution Overview
Problem
Current 5G networks lack the capability to effectively classify service function chaining (SFC) flows from non-SFC flows, which is essential for differentiated traffic management and quality of service (QoS) in next-generation cellular networks.
Innovation Solution
The introduction of a SFC service classifier that differentiates between SFC and non-SFC flows by using a SFC service ID and enhanced SDAP headers, allowing for granular mapping and encapsulation of SFC traffic paths within the 6G architecture, enabling flexible service function chaining and QoS management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If 5G networks use traditional flow classification methods, then network compatibility is maintained, but the capability to differentiate SFC flows from non-SFC flows is insufficient
Solution Approach 1:
The patent segments the flow classification process by introducing a dedicated SFC indicator field within the SDAP header structure. This segmentation allows SFC flows to be distinctly identified from non-SFC flows through a specific binary indicator (0 or 1), enabling granular classification without disrupting the overall 5G network architecture. The SFC indicator acts as a separate classification layer that works alongside existing QoS parameters.
Solution Approach 2:
The patent introduces an intermediary SFC indicator field as a mediator between the SDAP layer and the SFC service classifier. This intermediary element carries the SFC flow identification information through the network stack, allowing upstream classifiers to distinguish SFC traffic without requiring modifications to lower-layer protocols. The indicator serves as a bridge that translates SFC service requirements into actionable classification data.
2Measurement precision
If SFC service classifier is introduced with enhanced SDAP headers, then precise SFC flow classification is achieved, but header structure complexity increases
Solution Approach 1:
The patent applies partial action by introducing only the essential SFC indicator field and minimal additional metadata rather than completely redesigning the SDAP header structure. The SFC indicator uses a simple binary value (0 or 1) to convey flow type, and optional SFC metadata is only included when necessary. This partial enhancement achieves precise SFC flow identification while minimizing the increase in header complexity and processing overhead.
Solution Approach 2:
The patent applies local quality by enhancing only the specific portions of the SDAP header that are necessary for SFC classification (the SFC indicator field and optional metadata) while leaving the rest of the header structure unchanged. This localized enhancement ensures that existing SDAP processing functions continue to operate with minimal modification, reducing overall system complexity while achieving the desired classification precision.
3Adaptability or versatility
If granular mapping of SFC traffic paths is implemented, then service function chaining flexibility is improved, but traffic management complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring SFC service classifier rules that define the mapping between SFC flows and service function chains before traffic arrives. The network can pre-establish multiple SFC traffic paths with associated service function sequences, and the classifier automatically matches incoming SFC flows to the appropriate pre-configured path based on the SFC indicator and metadata. This eliminates the need for complex real-time routing decisions, reducing traffic management complexity while maintaining flexibility.
Solution Approach 2:
The patent applies dynamics by enabling the SFC service classifier rules to be dynamically updated and reconfigured without disrupting ongoing service function chaining operations. The network can add, modify, or remove SFC traffic path mappings in response to changing service requirements, and the classifier adapts its classification behavior accordingly. This dynamic capability allows the system to maintain high flexibility while managing complexity through standardized rule update procedures.
Data Source
AI summary
This disclosure describes systems, methods, and devices related to service function chaining classification in wireless networks. A communications network system may include a first cellular network device configured to: receive service data adaptation protocol (SDAP) data from a user equipment (UE) device, the SDAP data comprising a SDAP header; identify a service chaining function (SFC) service identifier of the SDAP header; determine that the SFC service identifier is indicative of a SFC service profile, the SFC service profile indicative of quality of service (QOS) traffic characteristics; identify a SFC traffic flow associated with the SFC service identifier; and transmit the SDAP data to a second cellular network device; and wherein the second cellular network device is configured to: receive the SDAP data from the first cellular network device; and transmit the SDAP data to a service function of the system.