User Equipment Buffer Status Report Calculation for PDU Space
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Solution Overview
Problem
In E-UTRA mobile communication networks, the existing buffer status report mechanism leads to resource waste due to unnecessary transmissions of buffer status reports, especially when only high-priority data is present or when buffers are empty, as the current system lacks clear guidelines for triggering short or long buffer status reports.
Innovation Solution
A method is introduced where user equipment calculates available space in a Protocol Data Unit (PDU) to determine if all data can be filled, triggering a short buffer status report only when necessary, and canceling reports when data can be completely transmitted, thereby optimizing resource usage by differentiating between short and long reports based on remaining data across logical channel groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing buffer status report mechanism is used in E-UTRA networks, then buffer status information can be reported to the base station, but network resources are wasted due to unnecessary transmissions of buffer status reports
Solution Approach 1:
The user equipment performs preliminary calculation of available PDU space before triggering the buffer status report transmission. By calculating whether the available PDU space can accommodate all data in the buffer of the logical channel group, the system determines in advance whether a report is necessary, preventing unnecessary transmissions and optimizing network resource usage.
2Loss of information
If buffer status reports are transmitted frequently to ensure accurate buffer status information, then the base station can make better resource allocation decisions, but network resource efficiency decreases
Solution Approach 1:
The user equipment autonomously determines whether a buffer status report needs to be transmitted by comparing the available PDU space with the buffer data amount. This self-service mechanism eliminates the need for frequent mandatory reports, allowing the system to maintain accurate buffer status information while improving resource allocation efficiency by reducing unnecessary transmissions.
3Speed
If short buffer status reports are triggered for high-priority data arrival, then timely buffer status information is provided, but unnecessary reports are sent when data can be completely transmitted
Solution Approach 1:
Upon arrival of high-priority data, the user equipment performs a preliminary check by calculating whether the available PDU space can accommodate all data in the buffer. Only if the data cannot be completely transmitted does the system trigger the short buffer status report. This preliminary action ensures timely reporting when necessary while preventing waste when transmission capacity is sufficient.
Data Source
AI summary
A method for providing a buffer status report in a mobile communication network is implemented between a base station and a user equipment. When data arrives to buffers of the user equipment and the priority of a logical channel for the data is higher than those of other logical channels for existing data in the buffers, a short buffer status report associated with the buffer of a logical channel group corresponding to the arrival data is triggered. The user equipment is based on obtained resources allocated by the base station to fill all data of the buffer of the logical channel group in a Protocol Data Unit. If all data of the buffer of the logical channel group corresponding to the arrival data can be completely filled in the Protocol Data Unit, the short buffer status report is canceled. Otherwise, the user equipment transmits the short buffer status report.