Protocol Layer Discard Signaling for XR Packet Delay Budgets
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Solution Overview
Problem
Current wireless communication systems struggle to meet the strict packet delay budget (PDB) requirements of Extended Reality (XR) and Cloud Gaming (CG) services due to the independent processing of data packets, which are often correlated and require synchronized handling.
Innovation Solution
Discarding data packets that cannot meet the PDB along with their associated packets, thereby releasing transmission resources for other UEs, and implementing a method where a first protocol entity sends an indication to a second protocol entity to discard a data unit set.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data packets are processed and transmitted independently in the current RAN, then each packet can be handled simply, but the temporal correlation and codec correlation between packets are not perceived, making it difficult to meet XR service requirements
Solution Approach 1:
The patent merges correlated data packets into a single data unit that is processed and transmitted together as a group. This allows the system to perceive temporal correlation and codec correlation between packets, ensuring that correlated data is handled synchronously to meet XR service requirements while maintaining processing efficiency.
2Quantity of substance
If all data packets are transmitted regardless of PDB compliance, then data completeness is maintained, but transmission resources are not released for other UEs, reducing system capacity
Solution Approach 1:
The patent introduces a timer mechanism that monitors the packet delay budget (PDB) parameter for each data unit. When the timer expires indicating PDB violation, the system changes the transmission parameter by discarding the non-compliant data unit and sending a discard indication to the lower layer, thereby releasing transmission resources for other UEs while maintaining PDB compliance for acceptable data.
3Productivity
If data units are discarded to meet PDB requirements, then transmission resources are released and system capacity improves, but data loss increases
Solution Approach 1:
The patent implements a feedback mechanism where the upper layer sends discard indications to the lower layer based on timer expiration results. This feedback loop allows the system to dynamically adjust data transmission based on PDB compliance status, releasing resources for time-critical data while maintaining awareness of discarded data to minimize information loss.
4Reliability
If correlated data packets are processed together, then temporal correlation and codec correlation are perceived, but processing complexity increases
Solution Approach 1:
The patent segments data into data units that group correlated packets together, allowing the system to process and transmit these units as atomic entities. This segmentation approach maintains the correlation awareness needed for XR services while simplifying the processing logic compared to handling individual packets, as the correlation management is encapsulated within the data unit structure.
Data Source
AI summary
A user equipment (UE) is configured for wireless communication. The UE is configured to receive a first data unit set in a first protocol entity. The first protocol entity is configured as a non-signaling radio bearer. The UE is configured to start a timer in response to receiving a first data unit. The first data unit is a data unit in the first data unit set. The UE is configured to generate a second data unit set based on the first data unit in the first data unit set. The UE is configured to send, in response to determining that the timer is expired, an indication to a second protocol entity. The indication is an indication to discard the second data unit set. A protocol layer in which the first protocol entity is located is above a protocol layer in which the second protocol entity is located.