PDU-Set Parameter Handling for XR Packet Dependencies
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Solution Overview
Problem
Current 5G systems lack support for PDU-set based handling, leading to inefficient packet processing and resource wastage in XR services due to the lack of consideration for packet dependencies within PDU sets.
Innovation Solution
Implementing methods and devices that provide parameters for PDU set handling, including discard and reordering timers, and transmitting these parameters between network and terminal devices to manage PDU sets effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PDU-set based handling is implemented, then packet processing efficiency is improved and resource wastage is reduced, but device complexity increases due to additional parameters and protocols
Solution Approach 1:
The patent segments QoS handling into PDU-set level operations, introducing PDU-set identifiers and grouping multiple PDUs into sets. This allows the system to process packets in meaningful groups rather than individually, improving efficiency while managing complexity through structured organization of data units
Solution Approach 2:
The patent applies preliminary action by configuring PDU-set parameters (discard timers, reordering timers, maximum retransmission counts) in advance through RRC signaling and F1 interface messages. This pre-configuration enables efficient runtime processing without real-time decision complexity, as the system already has predetermined handling rules for various PDU-set scenarios
2Reliability
If PDU set information is reflected in Uu interface, then XR service quality is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts PDU-set specific information (PDU-set ID, association relationships, quality metrics) from the general QoS flow and transports it separately through dedicated signaling mechanisms. This extraction allows the Uu interface to carry only essential PDU-set information while maintaining XR service quality, reducing unnecessary signaling overhead
Solution Approach 2:
The patent introduces intermediary signaling elements such as PDU-set container structures and mapping information that bridge the gap between core network QoS requirements and radio access network PDU-set handling. These intermediaries enable efficient information transfer by structuring data in a way that minimizes overhead while preserving all necessary quality parameters
3Loss of energy
If packet dependencies within PDU sets are considered, then resource allocation is optimized, but processing complexity increases
Solution Approach 1:
The patent merges packets that share common dependencies into PDU-sets, allowing the system to handle them as unified units. By combining packets with similar QoS requirements and dependency relationships, the system optimizes resource allocation through bulk operations while managing complexity through standardized set structures
Solution Approach 2:
The patent changes parameters at the PDU-set level (discard timer, reordering timer, maximum retransmission count) rather than individual packet level. This parameter aggregation reduces processing complexity by applying the same rules to multiple packets simultaneously, while still optimizing resource allocation based on the specific characteristics of each PDU-set
Data Source
AI summary
Example embodiments of the present disclosure relate to methods, devices, and computer storage medium for communication. The method comprises: receiving, at a terminal device from a network device, at least one of the following parameters associated with a protocol data unit (PDU) set: a first parameter indicating whether all PDUs in the PDU set are needed by an application layer; a second parameter indicating whether the PDU set is to be discarded when an additional PDU set associated with the PDU set is lost or discarded; a third parameter indicating a discard timer for the PDU set; or a fourth parameter indicating a reordering timer for the PDU set, and processing the PDU set based on the received at least one of the parameters. In this way, packet processing with PDU set granularity is supported, and PDU-set based handling is also supported. Therefore, communication quality and network performance are improved.