Buffer Status Reporting for Multi-MAC Entity Wireless Devices
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Solution Overview
Problem
In wireless communication systems, particularly in LTE, there is a need for efficient buffer status reporting in User Equipment (UE) connected to multiple MAC entities, as existing methods lack effective mechanisms to accurately report available data to base stations, impacting resource allocation and network performance.
Innovation Solution
The method involves configuring multiple logical channel sets and triggering buffer status reporting to the base station when data is available for transmission, specifically prioritizing channels and using indicators to distinguish between different MAC entities, allowing for precise reporting of data availability to each base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a UE is connected to multiple MAC entities, then the network can provide more flexible service and better resource allocation, but the existing buffer status reporting mechanism cannot accurately report available data to each base station
Solution Approach 1:
The patent segments the buffer status reporting mechanism by introducing a separate buffer status indicator for each MAC entity. The UE maintains multiple buffer status indicators (first buffer status indicator for first MAC entity, second buffer status indicator for second MAC entity) to independently track and report data availability to different base stations, ensuring accurate information transmission in multi-MAC entity connections.
2Loss of information
If the UE reports buffer status for all logical channels, then the base station receives complete information, but the reporting overhead increases
Solution Approach 1:
The patent extracts only the essential buffer status information for each MAC entity rather than reporting all logical channel details. By using buffer status indicators that summarize data availability at the MAC entity level, the mechanism provides complete information about which MAC entities have data to transmit while significantly reducing the overhead compared to reporting every individual logical channel's status.
3Reliability
If the UE triggers buffer status reporting frequently, then the base station receives timely information for resource allocation, but the network overhead and processing load increase
Solution Approach 1:
The patent implements a feedback mechanism where the UE triggers buffer status reporting based on actual data availability conditions. The first buffer status indicator is triggered when data becomes available for the first MAC entity, and the second buffer status indicator is triggered when data becomes available for the second MAC entity. This conditional feedback approach ensures timely resource allocation information is provided only when necessary, reducing unnecessary network overhead and processing load.
Data Source
AI summary
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method and a device for reporting a buffer status in the wireless communication system, the method comprising: generating a MAC PDU (Protocol Data Unit) including first BSR MAC CE (Buffer Status Reporting MAC Control Element) for an amount of data to be transmitted via the first MAC entity; and transmitting the MAC PDU via the second MAC entity to a base station.