Ethernet PDU Session Policy Rules for Wireless Service Matching

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Solution Overview

Problem

Wireless communications systems face challenges in providing Ethernet over wireless communications due to insufficient information about the wireless device, hindering the provision of desired services.

Innovation Solution

The system provides Ethernet packet data unit (PDU) session communications by allowing a wireless device to request an Ethernet PDU session through a session management function, which applies policy rules to data flows using Ethernet packet filter sets and addresses, enabling the user plane function to establish the requested session.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the system provides Ethernet over wireless communications, then service capability is improved, but information sufficiency deteriorates due to insufficient device-specific information

Engineering Contradiction:

Improveservice capabilityVSAvoidinformation sufficiency

Core Design Contradiction:

Adaptability or versatilityVSLoss of information

Solution Approach 1:

The patent applies preliminary action by having the wireless device provide Ethernet packet filter sets and addresses to the session management function before the Ethernet PDU session is established. This advance provision of device-specific information enables the system to configure policy rules and user plane functions in preparation for the session, resolving the information sufficiency issue before service delivery begins

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The session management function acts as an intermediary between the wireless device and the user plane function. It receives device-specific information from the wireless device, processes it into policy rules, and forwards relevant information to the user plane function. This intermediary mechanism bridges the information gap, enabling Ethernet over wireless communications without direct access to all device-specific information

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If Ethernet packet filter sets and policy rules are applied to data flows, then service accuracy is improved, but system complexity increases

Engineering Contradiction:

Improveservice accuracyVSAvoidsystem complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent applies segmentation by dividing the complex task of Ethernet PDU session management into distinct functional components: the session management function handles policy rule creation and information coordination, while the user plane function handles data flow filtering and policy application. This segmentation reduces overall system complexity by distributing responsibilities across specialized components

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent extracts the policy management complexity from the user plane function and places it in the session management function. By taking out the complex policy rule creation and coordination tasks from the data path, the system achieves accurate service delivery through policy rules while reducing the complexity burden on the user plane function

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS20250350484A1Packet data unit session communications

Publication Date: 2025.11.13 COMCAST CABLE COMM LLC

AI summary

Systems, apparatuses, and methods are described for wireless communications. A network function device, such as a policy control function device, may send one or more policy rules that are based on information associated with a wireless device. For example, the policy rules may be based on a virtual local area network (VLAN) tag or an Ethernet medium access control (MAC) address. The policy rules may be associated with a packet data unit (PDU) session of the wireless device.