Emergency Buffer Status Reporting for Time-Critical Uplink Data
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Solution Overview
Problem
The challenge in wireless communication systems is efficiently managing uplink and downlink data transmission to overcome latency and resource constraints, particularly in applications sensitive to delay or latency, such as 5G use cases like self-driving vehicles and remote healthcare, where timely data transmission is critical.
Innovation Solution
A method and apparatus for transmitting an emergency buffer status report (BSR) by a user equipment (UE) that triggers a BSR when the remaining time of a data unit is less than a threshold, including an indication of the remaining time, allowing the network to allocate sufficient resources for urgent data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits data units with limited remaining time, then the data transmission deadline can be met, but the network may not have sufficient time to allocate uplink resources, resulting in data loss
Solution Approach 1:
The UE triggers an emergency BSR report before the data unit deadline is reached, allowing the network to be notified in advance of the urgent resource allocation need. This preliminary notification enables the network to allocate uplink resources proactively rather than reactively, ensuring timely data transmission while avoiding data loss due to expiration.
Solution Approach 2:
The emergency BSR mechanism provides feedback to the network about the remaining time of data units in the UE buffer. By continuously monitoring and reporting buffer status with time-critical information, the network can dynamically adjust resource allocation to meet transmission deadlines, resolving the contradiction between data reliability and time constraints.
2Productivity
If the network allocates uplink resources dynamically based on BSR reports, then resource utilization efficiency is improved, but latency increases due to the additional signaling overhead and resource allocation process
Solution Approach 1:
The system dynamically adjusts the BSR triggering mechanism based on the remaining time of data units. When data units have limited remaining time, the UE triggers an emergency BSR report, enabling the network to switch to a more responsive resource allocation mode. This dynamic adaptation allows the system to balance resource utilization efficiency and latency by applying different strategies based on time-critical conditions.
3Reliability
If the UE triggers a BSR report for every data unit with limited remaining time, then the network can allocate resources timely, but the signaling overhead and network load increase
Solution Approach 1:
The emergency BSR mechanism applies a specialized reporting strategy only to data units with limited remaining time, rather than triggering reports for all data units. This localized application of the BSR mechanism ensures timely resource allocation for time-critical data while avoiding unnecessary signaling overhead for non-urgent transmissions, thus resolving the contradiction between reliability and information efficiency.
Data Source
AI summary
The present invention relates to a method of transmitting a Buffer Status Report (BSR) by a user equipment (UE) in a wireless communication system. Especially, the method includes the steps of receiving a data unit from an upper layer: triggering the BSR when a remaining time of the data unit is less than a threshold; and transmitting, to the network, the BSR including an amount of the data unit.