Delay Status Report Segmentation for Uplink Resource Allocation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G wireless communication systems, there is a need for efficient uplink resource allocation, which requires user equipment (UE) to report various pieces of information to the base station (BS), including a delay status report (DSR) to manage buffer status and data transmission effectively, but existing methods lack precision in identifying data with short remaining times, leading to potential data loss and resource wastage.
Innovation Solution
The UE receives a radio resource control (RRC) message configuring a remaining time threshold for the DSR, identifies a packet data convergence protocol (PDCP) service data unit (SDU) associated with the DSR, determines the PDCP data volume to be indicated to the medium access control (MAC) entity, and transmits a DSR MAC control element (CE) to the BS, allowing for precise reporting of remaining times and data volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE reports all PDCP data volume without filtering by remaining time, then the BS can allocate resources based on total buffer status, but data with short remaining times cannot be identified leading to potential data loss
Solution Approach 1:
The patent segments the PDCP data volume into two distinct components: data with remaining time greater than the threshold and data with remaining time less than or equal to the threshold. This segmentation allows the BS to identify and prioritize data with short remaining times, improving reliability without sacrificing measurement precision. The DSR MAC CE specifically reports the segmented volume of data meeting the remaining time criterion.
Solution Approach 2:
The patent applies local quality by providing different levels of detail for different data categories. Instead of a single aggregate report, the system provides specialized local information about data with short remaining times through the DSR MAC CE, while maintaining overall buffer status reporting. This localized precise measurement improves reliability for time-sensitive data without compromising overall system efficiency.
2Productivity
If the UE transmits detailed DSR reports frequently, then the BS can efficiently allocate uplink resources, but signaling overhead and resource wastage increase
Solution Approach 1:
The patent implements partial action by reporting only the specific portion of data that meets the remaining time threshold criterion, rather than reporting all PDCP data volume. The DSR MAC CE transmits only the volume of data with remaining time ≤ threshold, which is the critical information needed for urgent resource allocation. This partial reporting reduces signaling overhead while maintaining productivity for time-sensitive data.
Solution Approach 2:
The patent changes the reporting parameter from total PDCP data volume to segmented data volume based on remaining time threshold. By introducing the remaining time threshold parameter and reporting only data meeting this criterion, the system reduces unnecessary signaling for non-urgent data while improving resource allocation efficiency for time-sensitive data through targeted DSR reports.
3Reliability
If the UE identifies and reports only data with short remaining times, then data loss is reduced, but the complexity of identifying and segmenting data increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring the remaining time threshold parameter through RRC signaling before DSR reporting. This preliminary configuration establishes the segmentation criterion in advance, simplifying the actual DSR generation process. The UE only needs to compare data remaining times against the pre-configured threshold and report matching data, reducing identification complexity while maintaining reliability for time-sensitive data.
Solution Approach 2:
The patent introduces the remaining time threshold as an intermediary parameter that mediates between total data volume and individual data packet remaining times. This intermediary simplifies the identification process by providing a clear segmentation criterion, reducing device complexity. The threshold acts as a filter that automatically separates urgent from non-urgent data without requiring complex analysis of each packet.
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. A method performed by a user equipment (UE) in a wireless communication system is provided. The method includes receiving, from a base station (BS), a radio resource control (RRC) message configuring a remaining time threshold for a delay status report (DSR), identifying a packet data convergence protocol (PDCP) service data unit (SDU) associated with the DSR based on the remaining time threshold, determining a PDCP data volume to be indicated to at least one medium access control (MAC) entity based on the PDCP SDU associated with the DSR, and transmitting, to the BS, a DSR MAC control element (CE) based on the PDCP data volume.