XR Buffer Status Reporting with Timed Data Values to Reduce Latency
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Solution Overview
Problem
Existing Buffer Status Reporting (BSR) mechanisms in 5G networks face challenges in meeting the high data rate and low latency requirements of Extended Reality (XR) applications, leading to inefficiencies in data transmission.
Innovation Solution
An optimized BSR mechanism tailored for XR applications within 5G networks, involving triggering a buffer status report based on specific data amounts at defined time points, determining bit values in the BSR, and transmitting a Medium Access Control (MAC) protocol data unit (PDU) that includes the BSR, to enhance data throughput and reduce latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional BSR mechanisms are used in 5G networks, then general data transmission is supported, but data throughput and latency performance are insufficient for XR applications
Solution Approach 1:
The patent implements dynamic BSR triggering mechanisms that adapt to XR application requirements. The system dynamically determines when to trigger BSR based on buffer status changes, data arrival patterns, and timing requirements specific to XR traffic, rather than using fixed periodic reporting intervals. This dynamic approach optimizes both throughput and latency by reporting only when necessary while ensuring timely resource allocation for time-sensitive XR data.
Solution Approach 2:
The patent modifies BSR reporting parameters specifically for XR applications, including buffer size thresholds, reporting intervals, and priority levels. By changing these parameters dynamically based on application type and network conditions, the system achieves higher data throughput and reduced latency for XR traffic compared to traditional uniform BSR mechanisms designed for general data transmission.
2Loss of time
If BSR is triggered frequently to improve scheduling responsiveness, then latency is reduced, but network overhead and resource waste increase
Solution Approach 1:
The patent applies partial action by triggering BSR only when specific conditions are met for XR applications, such as buffer threshold crossings or data arrival events, rather than using frequent periodic reporting. This selective triggering reduces unnecessary BSR transmissions and network overhead while maintaining sufficient scheduling responsiveness for time-sensitive XR traffic through event-driven reporting mechanisms.
3Productivity
If buffer status reporting is optimized for XR applications, then data transmission efficiency improves, but device complexity increases
Solution Approach 1:
The patent implements local quality by applying XR-specific BSR optimization only to designated XR application traffic flows rather than modifying the entire BSR mechanism for all traffic types. The system maintains separate handling paths where XR data triggers specialized BSR behavior while other traffic uses traditional mechanisms, thus improving transmission efficiency for XR without unnecessarily complicating the overall system.
Data Source
AI summary
A method and apparatus to support XR services is provided. Method for supporting XR services includes triggering a buffer status report (BSR) in case that uplink data for a specific logical channel becomes available, determining a format of the BSR based on amount of specific data at a first time point, determining a value to be set in a specific bit of the BSR based on amount of specific data at a second time point in case that the BSR is first format, and transmitting a medium access control (MAC) protocol data unit (PDU), wherein the MAC PDU comprises the BSR. The amount of specific data at a first time point is amount of specific data when the MAC PDU is to be built. The amount of specific data at a second time point is amount of specific data when amount of resource to be allocated to logical channel is determined. The specific bit is related to buffer size table.