Padding Buffer Status Reporting for Wireless Terminals
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Solution Overview
Problem
Current buffer status reporting methods in wireless communications, specifically truncated BSRs, are insufficient for accurately reporting buffer data statuses across multiple logical channel groups, leading to inadequate radio resource allocation by base stations.
Innovation Solution
A method where a terminal determines the appropriate BSR format based on the number of padding bits, the size of the BSR format plus its MAC subheader, and the quantity of logical channel groups with data, allowing for the reporting of buffer status information across multiple logical channel groups, including flexible long and truncated BSR formats that include identifiers and sequenced buffer status information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a terminal uses a truncated BSR format (1 byte) to report buffer status, then the reporting can be completed within limited padding bits, but only one logical channel group status can be reported instead of multiple logical channel groups
Solution Approach 1:
The invention segments the buffer status reporting into multiple truncated BSR messages, each carrying status information for different logical channel groups. Instead of attempting to report all logical channel groups in a single message, the terminal divides the reporting task across multiple transmissions, with each truncated BSR focusing on a subset of logical channel groups. This segmentation allows complete coverage of all logical channel groups while maintaining compatibility with limited padding bit constraints.
2Loss of information
If a terminal reports buffer status for multiple logical channel groups, then complete buffer information is provided to the base station, but the required BSR format size exceeds available padding bits
Solution Approach 1:
The invention implements periodic action by transmitting multiple truncated BSR messages at different time instances, each carrying buffer status information for different logical channel groups. Rather than requiring a single large message, the terminal periodically reports status information in smaller units, allowing the base station to accumulate complete buffer status information across multiple receptions while each individual transmission remains within padding bit limits.
3Loss of information
If a terminal uses a long BSR format to report buffer status for multiple logical channel groups, then complete buffer information is provided, but the MAC subheader size and total message length exceed available padding bits
Solution Approach 1:
The invention extracts only the necessary buffer status information for specific logical channel groups into individual truncated BSR messages, rather than including all possible logical channel group statuses in a single long BSR format. Each truncated BSR is tailored to carry information for a particular subset of logical channel groups, removing unnecessary data elements and reducing the overall message size to fit within padding bit constraints while maintaining information completeness through multiple transmissions.
Data Source
AI summary
An embodiment of the present invention discloses a buffer status reporting method, where the method including: triggering, by a terminal, reporting of a padding buffer status report (padding BSR); and determining, by the terminal, a reported BSR format according to a size of padding bits, a size of a first type of BSR format plus its media access control (MAC) subheader, and a quantity of logical channel groups currently having to-be-transmitted data being buffered, where a quantity of logical channel groups corresponding to the BSR format is greater than or equal to 1, and less than or equal to a maximum quantity of logical channel groups currently having to-be-transmitted data being buffered.