Buffer Status Reporting for Low-Priority XR Data Scheduling
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Solution Overview
Problem
In XR environments, logical channels with a low Packet Delay Budget (PDB) are not prioritized for scheduling, leading to packet discard issues.
Innovation Solution
A method for a user equipment (UE) to transmit capability information associated with buffer state reporting (BSR), receive triggering conditions, and send a BSR message when low priority data meets specific criteria, including threshold-based conditions, to improve scheduling efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If logical channels with low PDB are not prioritized for scheduling, then scheduling simplicity is maintained, but packet discard occurs and reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by triggering buffer status reports in advance for low priority data before the packet delay budget expires. The UE monitors whether low priority data meets triggering conditions (such as remaining time within PDB) and proactively sends BSR messages to request scheduling resources, ensuring packets are transmitted before discard rather than reacting after discard has occurred.
Solution Approach 2:
The patent implements feedback mechanisms where the UE continuously monitors the buffer status of low priority data and provides feedback to the base station through BSR messages. This feedback loop enables the base station to make informed scheduling decisions about when to allocate resources for low priority data, improving reliability without requiring complex continuous prioritization logic.
2Loss of time
If traditional BSR triggering conditions are used, then device complexity is minimized, but low priority data within PDB is not transmitted timely
Solution Approach 1:
The patent applies local quality by implementing different BSR triggering conditions for low priority data compared to traditional high priority data handling. Specifically, low priority data is monitored for additional conditions such as remaining time within PDB, and BSR triggering is enabled only when these local conditions are met, allowing timely transmission of low priority data without overwhelming the system with complex triggering logic.
3Reliability
If low priority data is not monitored for PDB conditions, then processing overhead is reduced, but packets are discarded after PDB expires
Solution Approach 1:
The patent applies partial action by monitoring only the critical PDB condition for low priority data rather than implementing comprehensive monitoring of all possible parameters. The UE checks whether remaining time is within PDB and triggers BSR only when necessary, avoiding excessive processing overhead while ensuring PDB compliance for low priority data transmission.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system and a method for supporting a higher data transmission rate. The system and method comprise: transmitting. to a base station, a first message comprising capability information associated with a buffer state reporting (BSR): receiving. from the base station. a second message comprising configuration information triggering the BSR for low priority data: identifying. whether at least one condition of triggering the BSR for the low priority data is satisfied based on the configuration information: and transmitting, to the base station, a third message comprising the BSR for the low priority data in case that the at least one condition of triggering the BSR for the low priority data is satisfied.