Scheduling Request Cancellation for Split Data Radio Bearer
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Solution Overview
Problem
In wireless communication networks, especially in 5G NR and LTE systems, the management of scheduling requests (SRs) for split data radio bearers (DRBs) leads to inefficiencies due to unsynchronized transmission opportunities and lack of data buffer status coordination between base stations, resulting in unnecessary grants and wasted resources.
Innovation Solution
A method where user equipment (UE) determines the amount of data in its buffer and cancels SRs before transmission if the data is below a threshold, optimizing SR management by synchronizing with data buffer status and avoiding unnecessary transmissions on both primary and secondary communication links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If SR is triggered based on initial buffer status without re-checking, then SR transmission is simple and fast, but unnecessary SR transmissions occur when data is removed from buffer, wasting network resources
Solution Approach 1:
The patent applies preliminary action by checking the data buffer status before SR transmission and canceling the SR if data is no longer present. This pre-check mechanism prevents unnecessary SR transmissions and avoids wasting network resources while maintaining efficient SR handling
2Loss of energy
If SR is canceled before transmission when data is removed from buffer, then network resources are saved, but complexity increases due to additional buffer monitoring and SR cancellation logic
Solution Approach 1:
The patent implements feedback by continuously monitoring data buffer status changes and using this information to determine whether to cancel pending SR transmissions. This feedback mechanism enables intelligent SR management that balances resource efficiency with operational simplicity
3Loss of energy
If SR management is optimized by checking buffer status before transmission, then resource efficiency improves, but time is consumed for additional buffer checks and potential SR cancellations
Solution Approach 1:
The patent applies partial action by performing buffer status checks only when necessary - specifically when data is removed from the buffer before SR transmission. This selective approach optimizes resource efficiency while minimizing additional processing time by avoiding unnecessary checks
Data Source
AI summary
This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer-readable media, for managing scheduling requests (SRs) in a user equipment (UE) that supports a split data radio bearer (DRB). In some aspects, the UE may trigger a first SR for a first communication link and a second SR for a second communication link in response to determining that a first amount of data in the UE data buffer is greater than a first threshold. The UE may transmit the first SR to a first base station (BS) via the first communication link. Prior to transmission of the second SR, the UE may determine whether a second amount of data in the UE data buffer is less than a second threshold. The UE may cancel the second SR in response to the second amount of data in the UE data buffer being less than the second threshold.