XR Delay Status Reporting for Uplink Scheduling and Random Access Control
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Solution Overview
Problem
The existing Buffer Status Report (BSR) mechanism in 5G networks does not include delay status information, leading to inefficient scheduling for delay-sensitive applications like XR, and the Delay Status Report (DSR) mechanism faces challenges with insufficient uplink resources and unnecessary random access procedures.
Innovation Solution
A method and UE for enhanced DSR handling that includes stopping random access procedures when uplink resources are insufficient, forming DSR when grants are unavailable, and canceling scheduling requests to optimize resource utilization and avoid network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the existing Buffer Status Report (BSR) mechanism is used for uplink resource allocation, then the scheduling process is simple, but delay status information is not included leading to inefficient scheduling for delay-sensitive applications
Solution Approach 1:
The patent combines the Buffer Status Report (BSR) and Delay Status Report (DSR) mechanisms into a unified reporting framework. The DSR MAC CE includes both buffer status information and delay status information (remaining PDCP SDU delay), allowing the network to simultaneously assess both the quantity and timing characteristics of uplink data, thereby resolving the information loss while maintaining scheduling efficiency
Solution Approach 2:
The patent segments the status reporting into distinct MAC control elements: BSR MAC CE for buffer status and DSR MAC CE for delay status. This segmentation allows independent optimization of each reporting type while enabling the network to process different aspects of uplink status separately, improving overall scheduling efficiency for delay-sensitive applications
2Productivity
If the Delay Status Report (DSR) mechanism is implemented to include delay information, then scheduling efficiency for XR applications is improved, but uplink resource consumption increases
Solution Approach 1:
The patent implements partial DSR reporting where the UE includes delay status information only when necessary - specifically when delay-sensitive data is present in the buffer. The DSR MAC CE is transmitted selectively based on whether delay status information needs to be reported, reducing unnecessary uplink resource consumption while maintaining scheduling efficiency when needed
Solution Approach 2:
The DSR MAC CE serves multiple functions: it reports buffer status, delay status, and triggers scheduling decisions. By making this single MAC element multi-functional, the patent reduces the need for separate signaling messages, thereby optimizing uplink resource usage while maintaining comprehensive scheduling information
3Ease of operation
If random access procedure is initiated due to pending DSR without valid PUCCH resources, then scheduling requests can be transmitted, but network congestion increases and resource utilization deteriorates
Solution Approach 1:
The patent checks for the presence of valid PUCCH resources before initiating random access procedure for DSR transmission. By performing this preliminary check, the system avoids unnecessary random access procedures when alternative uplink resources are available, thereby reducing network congestion and improving overall resource utilization while still ensuring scheduling requests can be transmitted when needed
Data Source
AI summary
The disclosure relates to a 5G or 6G communication system for supporting a higher data transmission rate. Embodiments disclosed herein describe a method and user equipment (UE) for delay status report (DSR) handling for extended reality (XR) within a communication network system. The method involves the UE detecting a transmission of a medium access control (MAC) protocol data unit (PDU) or a cancellation of the DSR that triggered a scheduling request (SR) for the DSR. The UE stops an ongoing random access procedure initiated due to the SR for the DSR, wherein the SR for the DSR lacks configuration of valid physical uplink control channel (PUCCH) resources. This solution offers an enhanced DSR handling mechanism that ensures efficient transmission and better scheduling for the XR applications in wireless networks.