Buffer Status Report Format for Packet Duplication
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Solution Overview
Problem
Existing buffer status report (BSR) mechanisms in wireless communication systems cannot separately reflect the buffer statuses of packets and duplicated packets, which is essential for effective scheduling and resource allocation in carrier aggregation scenarios, particularly in Vehicle to Everything (V2X) configurations.
Innovation Solution
The proposed solution enhances the BSR mechanism by introducing a new format that includes both 'Legacy BSR Info' and 'duplicated packet buffer status' within the same Media Access Control (MAC) Control Element (CE), allowing for separate reporting of buffer sizes for logical channels with and without packet duplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the existing BSR mechanism based on service priority is used, then the reporting structure remains simple, but the buffer status of packets and duplicated packets cannot be reflected separately
Solution Approach 1:
The BSR MAC CE is segmented into multiple fields: a first field for legacy BSR information (packets without duplication) and a second field for duplicated packet buffer status (packets with duplication). This segmentation allows separate reporting of buffer statuses for different packet types while maintaining a structured and manageable format.
Solution Approach 2:
The patent adds a new dimension to the BSR format by introducing a dedicated field for duplicated packet buffer status alongside the existing legacy BSR field. This dimensional expansion enables the system to distinguish and report buffer statuses for packets with and without duplication simultaneously.
2Reliability
If packet duplication is enabled for enhanced reliability, then transmission reliability improves, but the scheduling complexity for eNB increases
Solution Approach 1:
The enhanced BSR mechanism provides feedback to the eNB about the buffer status of duplicated packets, enabling the eNB to make informed scheduling decisions. This feedback loop allows the eNB to allocate resources efficiently and manage scheduling complexity while maintaining the reliability benefits of packet duplication.
3Measurement precision
If separate buffer status reporting for packets and duplicated packets is implemented, then scheduling accuracy improves, but the control element size increases
Solution Approach 1:
The patent applies local quality by providing detailed buffer status information specifically for duplicated packets where needed, while maintaining the existing legacy BSR format for non-duplicated packets. This targeted approach ensures high measurement precision for critical duplicated packet buffer status without unnecessarily expanding the entire control element structure.
Data Source
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AI summary
Methods and apparatuses for reporting buffer status are disclosed, A method of reporting buffer status, comprising: sending a control element including buffer status information for a logical channel group on which first packets transmit and buffer status information for a corresponding logical channel group on which duplicated packets transmit.