Buffer Status Report for Split Bearers in LTE Dual Connectivity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the context of LTE systems with dual connectivity, there is no existing solution for accurately reporting buffer status information for split bearers, leading to resource wastage or insufficiency during uplink data transmission.
Innovation Solution
A method and apparatus for reporting and receiving buffer status, where a terminal transmits a Buffer Status Report (BSR) to a base station, including size information about buffer data and additional buffer data, especially when split bearers are involved, allowing each base station to accurately determine buffer data sizes and optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal uses split bearer architecture to transmit uplink data through multiple base stations, then data transmission capacity and mobility performance are improved, but the base station cannot accurately determine buffer data size leading to resource allocation inefficiency
Solution Approach 1:
The patent segments the buffer status reporting by introducing separate reporting mechanisms for split bearers. The terminal divides buffer status information into multiple parts: total buffer status and per-base-station buffer status, allowing each base station to accurately determine its allocated resource requirements while maintaining overall system productivity through dual-connectivity architecture
Solution Approach 2:
The patent introduces an intermediary reporting mechanism where the terminal provides buffer status information to both the master base station and secondary base station. This intermediary buffer status report acts as a mediator that enables each base station to make accurate resource allocation decisions without requiring complex inter-base-station communication protocols
2Device complexity
If traditional BSR reporting is used in split bearer architecture, then device complexity is reduced, but resource allocation becomes inefficient leading to waste or insufficiency
Solution Approach 1:
The patent changes the parameters of buffer status reporting by introducing new information elements: total buffer size and per-logical-channel-group buffer sizes for each base station. These parameter changes enable efficient resource allocation without requiring fundamental changes to the existing BSR protocol structure, thus maintaining low device complexity while improving resource allocation efficiency
Data Source
Figure 1~2
Figure 3~4
AI summary
The embodiments of the present invention propose a method and apparatus for reporting and receiving a buffer status. The method includes: when a terminal judges that there is a split bearer or receives a notification transmitted by a base station that an additional buffer report is required to be reported, the terminal transmitting a Buffer Status Report (BSR) of the radio bearer to the base station; herein the BSR carries size information about buffer data and size information about additional buffer data of the radio bearer. The embodiments of the present invention realize the reporting of a buffer status when there is a split bearer.