UE Data Delay Reporting via Threshold-Triggered MAC CE
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Solution Overview
Problem
Current wireless communication systems, particularly 5G NR, face challenges in efficiently utilizing radio resources for data transmission, as User Equipment (UE) lacks a mechanism to effectively report data delay information to the Base Station (BS), leading to suboptimal scheduling and resource allocation for time-critical traffic like Extended Reality (XR) applications.
Innovation Solution
The method involves the UE receiving thresholds from the BS and transmitting specific Medium Access Control (MAC) Control Elements (CE) carrying data delay information and buffer size values, allowing the BS to prioritize transmissions based on these values, and utilizing mapping tables to determine the appropriate data delay information for reporting, ensuring timely and efficient resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE transmits detailed data delay information for every LCG, then the BS can make more accurate scheduling decisions, but the signaling overhead and resource consumption increase
Solution Approach 1:
The patent applies local quality by differentiating the reporting behavior across different LCGs based on their specific characteristics. Each LCG is configured with its own threshold value, and the UE selectively reports data delay information only for LCGs where the delay information exceeds their specific thresholds. This allows the system to maintain high scheduling accuracy for critical LCGs while reducing signaling overhead for less critical ones.
Solution Approach 2:
The patent implements partial action by having the UE report data delay information selectively rather than for all LCGs unconditionally. The reporting is triggered only when specific conditions are met (i.e., when delay information exceeds configured thresholds), thereby providing sufficient information for accurate scheduling while avoiding the excessive signaling overhead of reporting all possible data delay information.
2Speed
If the UE reports data delay information frequently, then the BS can respond faster to latency-critical traffic, but the uplink resource consumption increases
Solution Approach 1:
The patent implements periodic action through threshold-based triggering mechanisms. Instead of continuous reporting, the UE periodically monitors data delay information and transmits reports only when predefined thresholds are exceeded. This creates a rhythm of reporting that ensures timely response to critical traffic while minimizing unnecessary transmissions that would consume uplink resources.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting the reporting behavior based on the state of data delay information. The configured thresholds act as parameter boundaries that determine when reporting should occur. When delay information crosses these parameter thresholds, reporting is activated; otherwise, the system remains in a low-resource-consumption state.
3Loss of time
If the UE prioritizes data delay information reporting over BSR reporting, then latency-critical traffic gets faster service, but the buffer status information transmission may be delayed
Solution Approach 1:
The patent applies feedback mechanisms where the BS receives data delay information reports and uses this feedback to adjust scheduling decisions. The selective reporting of data delay information provides the BS with feedback about critical traffic conditions, enabling it to prioritize latency-sensitive transmissions while maintaining overall system reliability through informed scheduling.
Solution Approach 2:
The patent implements preliminary action by pre-configuring thresholds and reporting rules before data transmission begins. This preliminary setup allows the UE to quickly determine whether reporting is needed without complex real-time decisions, enabling fast response to critical traffic while ensuring that buffer status information is reported appropriately based on pre-established criteria.
Data Source
AI summary
Methods and apparatuses for reporting and managing data delay information are provided. The method includes receiving a first threshold for a first Logical Channel Group (LCG) from a Base Station (BS) and transmitting a particular Medium Access Control (MAC) Control Element (CE) to the BS in a case that a first condition associated with the first threshold is met. The particular MAC CE carries, at least, a first data delay information value for the first LCG and a first buffer size value indicating an amount of first Uplink (UL) data that is associated with the first condition and buffered in the first LCG.