Delay-Aware Logical Channel Prioritization for XR Traffic
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Solution Overview
Problem
Existing wireless communication systems struggle to efficiently prioritize and transmit delay-critical data for multi-modal traffic in extended reality (XR) applications, leading to potential delays and inefficiencies in delivering synchronized audio, video, and haptic data.
Innovation Solution
Implementing a delay-aware logical channel prioritization (LCP) procedure that considers both logical channel priority and data delay status, enhancing the UL scheduling process by prioritizing delay-critical data during resource allocation, and incorporating delay status reporting (DSR) to ensure timely delivery of urgent data packets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional logical channel prioritization is used, then simple priority-based scheduling is maintained, but delay-critical data for multi-modal traffic cannot be efficiently prioritized and transmitted
Solution Approach 1:
The patent modifies the traditional single-parameter (logical channel priority) scheduling approach by introducing a second parameter (delay status) to create a multi-parameter prioritization mechanism. This allows the system to distinguish between delay-tolerant and delay-critical data, enabling reliable delivery of urgent multi-modal traffic while maintaining manageable scheduling complexity through structured parameter evaluation.
2Productivity
If delay-aware prioritization is implemented, then transmission efficiency of urgent data is improved, but processing complexity at the UE increases
Solution Approach 1:
The patent applies preliminary action by having the UE report delay status information to the network in advance, allowing the network to pre-configure prioritization rules and allocate resources accordingly. This advance preparation enables efficient transmission of delay-critical data without requiring complex real-time processing at the UE during actual data transmission.
Solution Approach 2:
The patent implements feedback through delay status reporting mechanisms where the UE provides information about its delay-critical data to the network. This feedback loop enables the network to adjust scheduling decisions dynamically, improving transmission efficiency of urgent data while keeping UE processing requirements manageable through standardized feedback protocols.
3Loss of time
If delay status reporting is added, then timely delivery of urgent packets is ensured, but overhead for resource allocation increases
Solution Approach 1:
The patent applies partial action by implementing delay status reporting selectively rather than universally - only for logical channels carrying delay-critical data. This approach ensures timely delivery of urgent packets while minimizing overhead by avoiding unnecessary reporting for delay-tolerant traffic, thus balancing performance improvement with overhead control.
4Reliability
If multi-modal traffic is prioritized, then synchronization of audio, video, and haptic data is improved, but power consumption at UE increases
Solution Approach 1:
The patent applies local quality by implementing differentiated prioritization treatment for different types of data within multi-modal traffic. Instead of uniformly treating all data equally, the system applies enhanced prioritization only to delay-critical data streams (such as audio and haptic data), while maintaining normal handling for less time-sensitive data. This selective approach improves synchronization reliability for critical streams while minimizing additional power consumption.
Data Source
AI summary
Various aspects of the present disclosure relate to techniques for delay-aware logical channel prioritization for multi-modal traffic. A user equipment (UE) is configured to establish a logical channel based on a received configuration, the configuration comprising a logical channel priority for the logical channel, receive information for allocating resources for data transmission associated with the logical channel, determine a first parameter associated with data of the logical channel and a second parameter associated with data of the logical channel, and calculate a priority value for the data of the logical channel based at least in part on the first parameter, the second parameter, and the logical channel priority in response to determining that the first parameter is below a threshold.