Configured Grant BSR for Low-Latency Logical Channel Scheduling
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Solution Overview
Problem
In wireless communication systems, there is a challenge in efficiently managing buffer status reporting (BSR) due to limited resources, leading to delays and inefficiencies in uplink/downlink data transmission, particularly in applications sensitive to latency.
Innovation Solution
A method and apparatus for transmitting BSR based on Configured Grant (CG) by configuring Logical Channel Groups (LCGs) that include multiple Logical Channels (LCHs, triggering BSR, and transmitting data and BSR on a CG related to at least one LCH, with the BSR indicating data volume to be transmitted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Buffer Status Reporting is transmitted using traditional methods, then the network can receive buffer status information, but resource allocation inefficiency occurs and transmission delays increase
Solution Approach 1:
The patent applies preliminary action by transmitting Buffer Status Reports proactively on Configured Grant resources before actual data transmission is needed. The UE prepares and sends BSR information in advance using pre-configured uplink resources, allowing the network to have accurate buffer status information ready before dynamic grant allocation, thereby eliminating waiting time and improving resource allocation efficiency.
2Ease of manufacture
If Configured Grant resources are allocated without accurate buffer status information, then resource allocation is simplified, but resource wastage occurs and dynamic grants cannot be properly provided
Solution Approach 1:
The patent implements feedback by having the UE continuously report buffer status information on Configured Grant resources. This feedback mechanism provides the network with accurate real-time buffer status, enabling the network to make informed decisions about dynamic grant allocation. The network can precisely allocate resources based on actual buffer status, avoiding both over-allocation (wastage) and under-allocation (delays).
3Productivity
If multiple Logical Channels are grouped into Logical Channel Groups for BSR transmission, then resource utilization is improved, but the complexity of channel management increases
Solution Approach 1:
The patent applies merging by combining multiple Logical Channels into Logical Channel Groups (LCGs) for unified BSR transmission. Instead of managing separate BSR reports for each logical channel, the UE aggregates buffer status information from multiple LCHs within an LCG and transmits it together on Configured Grant resources. This reduces the total number of BSR transmissions and simplifies resource management while improving utilization.
Data Source
AI summary
The present disclosure relates to a method of transmitting a Buffer Status Reporting (BSR) by a user equipment (UE) in a wireless communication system. Especially, the method includes the steps of configuring a Logical Channel Group (LCG) including two or more Logical Channels (LCHs), wherein the two or more LCHs are related to different configured grants (CGs); triggering the BSR; and transmitting data of at least one of the two or more LCHs and the BSR, on a CG related to the at least one LCH, wherein the BSR indicates data volume to be transmitted on the CG.