XR Buffer Status Reporting for Accurate 5G Uplink Grants
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Solution Overview
Problem
Existing wireless communication technologies do not effectively support buffer status reporting (BSR) for extended reality (XR) services, leading to performance degradation due to packet loss and improper uplink grant sizing in 5G systems.
Innovation Solution
A novel BSR mechanism is introduced for XR services, triggered by specific conditions such as priority, importance, or timer expiration, generating ADU-specific buffer status information and using separate MAC CEs for transmission, ensuring accurate reporting of XR data volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional buffer status reporting mechanisms are used for XR services, then the network can receive basic buffer information, but the scheduling accuracy and adaptability for XR traffic characteristics are insufficient
Solution Approach 1:
The patent segments the buffer status report into multiple types (first BSR for high-priority data, second BSR for other data) and divides the buffer into separate buffers associated with different logical channels. This segmentation enables the network to receive detailed buffer information organized by priority and channel, significantly improving measurement precision while adapting to XR traffic characteristics that require differentiated handling.
Solution Approach 2:
The patent applies local quality by assigning different reporting requirements to different buffers based on their characteristics. High-priority buffers (first buffers) trigger first BSRs with specific formatting, while other buffers (second buffers) trigger second BSRs. This allows each buffer region to have customized reporting behavior matched to its specific traffic characteristics, resolving the contradiction between general reporting accuracy and XR-specific adaptability.
2Productivity
If multiple BSR types are implemented to improve scheduling accuracy, then the network can better schedule uplink grants for XR services, but the device complexity increases
Solution Approach 1:
The patent merges the BSR triggering mechanism into the existing MAC entity operation flow, combining multiple BSR types within a unified trigger-generation framework. The processor evaluates trigger conditions and generates appropriate BSR types based on buffer state, integrating complexity management into standard MAC procedures rather than adding separate complex systems. This approach improves scheduling efficiency while controlling device complexity through consolidation.
Solution Approach 2:
The patent implements preliminary action by pre-configuring buffer associations with logical channels and pre-establishing trigger conditions in the MAC entity. Before actual BSR generation, the system has prepared the structural framework for differentiated reporting, so that when triggers occur, the processor can efficiently determine the appropriate BSR type without complex real-time decision-making. This reduces operational complexity while maintaining high scheduling efficiency.
Data Source
AI summary
Embodiments of the present application relate to a method and apparatus of reporting buffer status. An exemplary UE includes: at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one receiving circuitry and the at least one transmitting circuitry, wherein the at least one processor is configured to: trigger a buffer status report (BSR) in response to a trigger condition associated with an application data unit (ADU) being satisfied; and generate buffer status information for the BSR.