Logical Channel Buffer Status Report for Latency Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In LTE and 5G communication systems, the coarse granularity of resource allocation due to buffer status report (BSR) reporting based on logical channel groups leads to increased latency for services with high transmission latency requirements, causing delays in data transmission.
Innovation Solution
Implementing BSR reporting based on individual logical channels or data bearers for service data with high transmission latency requirements, allowing for precise resource allocation and pre-segmentation of data units to reduce processing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If BSR reporting is performed based on logical channel groups (LCG), then resource allocation can be simplified and managed at a higher level, but the granularity of resource allocation becomes coarse, resulting in increased latency for latency-sensitive services
Solution Approach 1:
The patent segments the BSR reporting mechanism by introducing separate BSR types: LCG-based BSR for non-latency-sensitive services and logical channel (LC)-based BSR for latency-sensitive services. This segmentation allows the system to maintain simplified resource allocation for general traffic while providing fine-grained control for time-critical services, thereby resolving the contradiction between allocation simplicity and latency performance.
2Productivity
If BSR reporting is performed based on LCG, then the base station can allocate resources at a coarser granularity, but this prevents accurate learning of data volume on specific logical channels carrying latency-sensitive services, causing transmission delays
Solution Approach 1:
The patent implements a dynamic BSR reporting mechanism where the reporting granularity adapts based on service requirements. For latency-sensitive services, the system dynamically switches to LC-based BSR reporting to achieve precise data volume measurement, while for other services, LCG-based reporting maintains allocation efficiency. This dynamic adaptation resolves the contradiction between allocation efficiency and measurement precision.
3Loss of energy
If resource multiplexing is performed between logical channels based on LCG allocation, then resource utilization can be improved, but additional processing time is consumed in the resource multiplexing process, increasing latency
Solution Approach 1:
The patent extracts latency-sensitive services from the general LCG-based resource allocation framework by implementing separate LC-based BSR reporting and dedicated resource allocation for these services. This extraction eliminates the need for complex resource multiplexing processing for time-critical data, thereby resolving the contradiction between resource utilization efficiency and processing delay.
Data Source
AI summary
A buffer status report reporting method and apparatus, the method including determining, by a terminal, a first logical channel used to transmit first-type service data, where data processing duration required by the first-type service data is less than a first specified threshold, triggering, by the terminal, a first buffer status report BSR based on the first logical channel when the first-type service data that can be used to be sent exists on the first logical channel, sending the first BSR to a base station, receiving a first uplink resource allocated by the base station to the first logical channel, and sending, by the terminal, the first-type service data by using the first uplink resource.