Flexible Buffer Status Report for 5G NR Resource Efficiency
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Solution Overview
Problem
In 5G NR networks, the traditional Buffer Status Report (BSR) method wastes channel resources when the number of logical channel groups (LCGs) carrying data is less than eight, as it transmits a long BSR regardless of the actual data load, leading to inefficient data transmission.
Innovation Solution
A system and method to determine a BSR of flexible length based on the size of the data item and the minimum number of required LCGs, including LCG identifiers, to optimize BSR transmission, prioritizing data items, and transmitting the report with high priority in duplication across multiple paths to ensure reliable resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a long BSR including buffer information of all eight LCGs is transmitted according to the LTE system, then the buffer status information is complete, but channel resources are wasted when the number of LCGs taking data item to be sent is less than eight
Solution Approach 1:
The patent segments the BSR transmission by dividing it into multiple parts: a first BSR containing buffer information of a first subset of LCGs, and a second BSR containing buffer information of a second subset of LCGs. This segmentation allows the system to transmit only the necessary buffer status information for LCGs that actually have data to send, rather than transmitting a complete BSR for all eight LCGs, thereby reducing channel resource waste while maintaining information completeness.
Solution Approach 2:
The patent implements dynamic BSR transmission by determining whether to transmit a long BSR or short BSR based on the actual data load. The system dynamically adjusts the BSR length and content according to the number of LCGs that have data items to send, using indicators such as the most significant bit (MSB) to signal the base station about the appropriate BSR format. This dynamic approach ensures that channel resources are utilized efficiently without compromising the completeness of buffer status information.
2Productivity
If the number of LCGs is increased to eight to meet the explosive growth of mobile data, then the data transmission capacity is improved, but the BSR length increases and wastes channel resources
Solution Approach 1:
The patent segments the eight LCGs into multiple subsets, transmitting buffer information for only those subsets that have data to send. By dividing the LCGs into a first subset and a second subset and using separate BSR transmissions, the system maintains the capability to handle eight LCGs for high data transmission capacity while avoiding the waste of transmitting buffer information for all eight LCGs when fewer are actually needed.
Solution Approach 2:
The patent changes the parameter of BSR length dynamically based on the actual number of active LCGs. By using indicators such as the most significant bit (MSB) to signal whether a long or short BSR should be transmitted, the system adapts the BSR parameter to match the actual data load, thereby maintaining high data transmission capacity through eight LCGs while reducing channel resource consumption when fewer LCGs are active.
Data Source
AI summary
The present disclosure disclosed a method of determining a buffer status report (BSR). The method comprises obtaining, by a user equipment (UE) from a buffer, data item to be sent; determining, by the UE, a size of the data item to be sent; determining, by the UE, a minimum number of required logical channel groups (LCGs) based on the data item to be sent; and determining, by the UE, at least one BSR with flexible length based on the size of the data item to be sent and the minimum number of the required LCGs. Information of the at least one BSR with flexible length includes the minimum number of the required LCGs, LCG identifiers (LCG IDs) respectively associated with the minimum number of the required LCGs, and at least one buffer area corresponding to the LCG IDs.