Delay-Budget-Aware Uplink Scheduling for Wireless Logical Channels
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Solution Overview
Problem
Existing wireless communication systems struggle to effectively manage uplink resource allocation for delay-sensitive services like XR, as they do not consider the expiration times of data packets, leading to inefficiencies and increased packet loss.
Innovation Solution
A method where UE reports data packet delay information to the base station for informed resource allocation, prioritizing logical channels with data packets that have not exceeded their delay budget, ensuring timely transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional uplink resource allocation is used without considering packet expiration, then resource allocation is simple, but packet loss increases for delay-sensitive services
Solution Approach 1:
The patent applies preliminary action by having the UE report delay information (remaining delay budget) to the base station before resource allocation occurs. This allows the base station to proactively identify packets that are approaching their expiration time and prioritize them in upcoming scheduling decisions, preventing packet loss before it occurs rather than reacting after packets are lost.
Solution Approach 2:
The patent implements feedback by establishing a closed-loop mechanism where the UE continuously reports delay status information about its buffered packets to the base station. The base station uses this feedback to dynamically adjust resource allocation priorities, and the UE's delay reports provide ongoing information about which packets need urgent transmission, enabling adaptive scheduling that responds to actual network conditions.
2Productivity
If delay information reporting is implemented, then scheduling efficiency improves, but signaling overhead increases
Solution Approach 1:
The patent applies the taking out principle by extracting only the essential delay information (remaining delay budget) that the UE needs to report to the base station. Instead of transmitting complete packet-level metadata or extensive buffer status information, the solution isolates and reports only the critical delay metric, reducing signaling overhead while maintaining sufficient information for effective delay-aware scheduling decisions.
3Loss of time
If packets are prioritized based on remaining delay budget, then delay-sensitive service performance improves, but resource allocation complexity increases
Solution Approach 1:
The patent applies parameter changes by using the remaining delay budget as a dynamic parameter that changes over time for each packet. As packets age and their remaining delay budget decreases, their priority automatically increases. This transforms the static priority-based scheduling into a dynamic parameter-driven approach where the time parameter (remaining delay budget) directly influences resource allocation decisions, enabling adaptive delay management without complex algorithms.
Data Source
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AI summary
Disclosed in the present application are a method and a device used in wireless communication. A first node receives a first signaling, the first signaling indicates a first grant and a first time value; a first type time for each data packet contained in a first set of logical channels is maintained; a first subset of logical channels from the first set of logical channels based on a first set of parameters is selected; resources are allocated to logical channels in the first subset of logical channels in an order from high priority to low priority; a first set of data packets are sent via the first grant, the first set of data packets comprises data packets in logical channels allocated to resources; wherein the first set of parameters comprises the first time value, the first set of data packets comprises at least one first type data packet, the first type time of the first type data packet is not greater than the first time value; the first subset of logical channels comprises at least one logical channel. The present application effectively supports the transmission of delay-sensitive services.