Logical Channel Priority Adjustment for Delay-Sensitive Uplink Traffic
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing priority adjustments for logical channels, particularly for delay-sensitive traffic such as extended reality (XR) traffic, which can lead to scheduling starvation in low-priority channels due to insufficient bandwidth allocation.
Innovation Solution
Implementing priority adjustment parameters for logical channels that allow delay-sensitive data to be dynamically upgraded to higher-priority channels, with thresholds and limits on data adjustments to ensure fair resource allocation and prevent scheduling delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If priority adjustment parameters are implemented for logical channels, then delay-sensitive traffic delivery is improved, but system complexity increases
Solution Approach 1:
The patent implements priority adjustment by changing the priority parameter of logical channels dynamically. When delay-sensitive traffic is detected, the system adjusts the priority parameter from a default value to a higher priority value, enabling timely delivery without requiring fundamental system restructuring.
Solution Approach 2:
The system transitions from static channel prioritization to dynamic prioritization where channel priorities can be adjusted in real-time based on traffic characteristics. The network node monitors traffic types and dynamically modifies priority parameters to accommodate delay-sensitive applications like XR traffic.
2Loss of time
If bandwidth is allocated to high-priority channels, then delay-sensitive traffic performance is improved, but low-priority channels experience scheduling starvation
Solution Approach 1:
The patent applies partial priority adjustment rather than complete preemption. The priority parameter is adjusted to favor delay-sensitive traffic when needed, but not to the extent that completely starves low-priority channels. This balanced approach ensures timely delivery of critical traffic while maintaining baseline service for other channels.
Solution Approach 2:
The system implements periodic priority adjustment where the priority parameter is reassessed at scheduling intervals. This allows the system to alternate between prioritizing delay-sensitive traffic when delays are detected and returning to normal priority distribution when traffic conditions improve, preventing sustained starvation of low-priority channels.
3Adaptability or versatility
If priority adjustment parameters are configured, then resource allocation flexibility is improved, but configuration overhead increases
Solution Approach 1:
The patent extracts only the essential priority adjustment parameters from the full configuration set, implementing a streamlined configuration that includes only the parameters necessary for delay-sensitive traffic handling. This reduces configuration overhead while maintaining the flexibility needed for adaptive resource allocation.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration associated with a first logical channel (LCH) with a first priority, wherein the configuration indicates one or more parameters to adjust data assigned to the LCH from the first priority to a second priority. The UE may adjust a priority of a service data unit (SDU) associated with the first LCH to the second priority in accordance with the one or more parameters. The UE may transmit the SDU via uplink shared channel (UL-SCH) resources based at least in part on the second priority. Numerous other aspects are described.