Regular Buffer Status Reporting for Delayed Uplink Grants
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing buffer status reports (BSRs) during transitions between different radio configurations, leading to delays and performance issues, particularly for applications that generate data at regular intervals, such as video streams and augmented reality, resulting in jittery experiences and inefficient use of network resources.
Innovation Solution
A method is introduced to enhance BSR techniques by triggering regular BSRs proactively based on specific conditions, even when uplink grants are not immediately available, to facilitate smoother data transmission and reduce delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If regular BSR procedures are followed strictly, then network resource utilization is optimized, but data transmission delays occur for applications generating data at regular intervals
Solution Approach 1:
The patent applies preliminary action by proactively triggering regular BSRs before uplink grants are available when specific conditions are met (data in buffer, application active, no recent BSR). This allows the network to prepare scheduling decisions in advance, reducing latency for time-sensitive applications while maintaining efficient resource utilization through conditional triggering rather than continuous reporting.
2Reliability
If BSRs are triggered frequently to reduce delays, then application performance improves, but network resource efficiency deteriorates
Solution Approach 1:
The patent implements partial action by triggering regular BSRs only under specific conditions rather than continuously or excessively. The conditions require data presence in buffer, active application state, and absence of recent BSRs, creating a balanced approach that provides sufficient BSRs for reliable application performance while avoiding unnecessary network resource consumption from excessive reporting.
3Productivity
If uplink grants are waited for before triggering BSR, then network resource efficiency is maintained, but data transmission speed decreases
Solution Approach 1:
The patent applies dynamics by making the BSR triggering behavior adaptive rather than static. The system dynamically adjusts BSR triggering based on real-time conditions including buffer status, application activity state, and timing since last BSR. This dynamic approach enables faster data transmission when conditions warrant it while maintaining resource efficiency during normal operation, with the added complexity of conditional logic being justified by the performance gains.
Data Source
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AI summary
Wireless communications techniques related to buffer status reports (BSRs) are provided. In some aspects, a method of wireless communication performed by a user equipment (UE) includes: determining a buffer status report (BSR) condition is present based on a condition of an application; determining an uplink grant is not available for the UE to transmit data, related to the application, in a buffer of the UE within a period of time; removing the data from the buffer; resubmitting, to the buffer, at least a portion of the data removed from the buffer; and transmitting, to a base station (BS), at least one of a BSR or a scheduling request (SR) based at least in part on the resubmitting the at least the portion of the data to the buffer. Other aspects and features are also claimed and described.