PDU Set Stream Identification for Multiplexed QoS Media Flows
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Solution Overview
Problem
Existing video coding systems in extended reality applications lack adequate mechanisms for controlling degree of freedom boundaries, leading to inefficiencies in managing multiplexed media stream data flows.
Innovation Solution
A device identifies multiplexed media stream data flows using packet data unit (PDU) set information, generating stream IDs and sending them to user plane functions or media clients, allowing for the multiplexing of media streams into quality of service (QoS) flows, and indicating stream splits or combinations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple media streams are multiplexed into a single QoS flow, then resource allocation efficiency is improved, but the ability to control degree of freedom boundaries deteriorates
Solution Approach 1:
The patent segments the QoS flow into multiple PDU sets, each carrying a specific media stream. This allows independent control and management of each stream within the QoS flow, enabling degree of freedom boundary control while maintaining resource allocation efficiency. The PDU set marking header extension provides identifiers that distinguish between different media streams multiplexed in the same QoS flow.
Solution Approach 2:
The patent introduces a PDU set marking header extension as an intermediary mechanism between the media streams and the QoS flow. This header extension contains stream identifiers and control information that enable the network to distinguish and control individual streams within the multiplexed QoS flow, resolving the contradiction between efficient multiplexing and boundary control.
2Measurement precision
If PDU set marking header extension is added to identify stream IDs, then measurement precision of data flow identification is improved, but device complexity increases
Solution Approach 1:
The patent makes the PDU set marking header extension serve multiple functions: it identifies stream IDs, provides QoS flow association information, and enables control plane signaling. By consolidating these functions into a single header extension structure, the patent improves measurement precision without proportionally increasing device complexity.
Solution Approach 2:
The patent performs stream identification and QoS flow association in advance through the PDU set marking header extension during the control plane negotiation. This preliminary action establishes the mapping relationships before data transmission begins, improving identification precision while the complexity is managed through standardized protocol procedures.
Data Source
AI summary
Systems, methods, and instrumentalities may be configured for identifying multiplexed media stream data flows using packet data unit (PDU) set information. In examples, a device may receive a first stream identifier (ID) associated with a first PDU set. The first stream ID may be received in a PDU set marking header extension (HE). The device may determine, from the PDU set marking HE, that the first stream ID is associated with a first media stream. The device may send at least the first stream ID identifying the first media stream and the first PDU set associated with the first stream ID.