5G XR Scheduling Request Multiplexing for Uplink Resource Efficiency
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing scheduling requests (SRs) for extended reality (XR) services, particularly in terms of resource allocation and power consumption, due to the varying bit rates and priority levels of XR traffic flows.
Innovation Solution
Implementing SR enhancements through mechanisms like semi-persistent scheduling, configured grants, and dynamic scheduling, along with optimizations such as buffer status reporting, SR multiplexing, and payload concatenation, to manage XR-specific traffic characteristics and improve resource allocation and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional scheduling request mechanisms are used for XR services, then resource allocation can be maintained with existing protocols, but power consumption increases and resource allocation efficiency deteriorates due to varying bit rates and priority levels of XR traffic flows
Solution Approach 1:
The patent segments scheduling requests into multiple priority levels (first priority SR and second priority SR) corresponding to different XR traffic flows with varying bit rates and quality requirements. This segmentation allows the system to handle high-priority traffic (e.g., real-time video) separately from lower-priority traffic (e.g., background data), improving resource allocation efficiency while reducing unnecessary power consumption by not treating all traffic equally.
Solution Approach 2:
The patent changes key parameters including SR priority levels, periodicity values, and payload sizes based on XR service requirements. By dynamically adjusting these parameters according to traffic characteristics, the system optimizes resource allocation for different XR applications while reducing power consumption through adaptive scheduling rather than fixed periodic transmissions.
2Measurement precision
If multiple scheduling requests are sent for different XR traffic flows, then resource allocation accuracy improves, but device complexity and signaling overhead increase
Solution Approach 1:
The patent merges multiple scheduling requests into a single uplink transmission by multiplexing different SRs (with different priorities and payloads) into one PUCCH or PUSCH transmission. This combining approach maintains resource allocation accuracy for different XR traffic flows while reducing device complexity and signaling overhead compared to sending separate transmissions for each SR.
Solution Approach 2:
The patent creates a universal SR structure that can carry multiple priority levels and different payload types within a single scheduling request framework. This multi-functional SR design allows the system to handle diverse XR traffic requirements (different bit rates, priorities, and quality levels) through a unified mechanism, reducing complexity while maintaining allocation precision.
3Reliability
If scheduling requests are transmitted frequently to maintain real-time XR service quality, then service reliability improves, but power consumption and network overhead increase
Solution Approach 1:
The patent implements periodic scheduling requests with configurable periodicity values that adapt to XR service requirements. By using periodic rather than continuous transmissions, the system maintains real-time service quality for critical XR traffic while reducing power consumption and network overhead compared to frequent or continuous SR transmissions. The periodicity can be adjusted based on traffic characteristics and service priorities.
Data Source
AI summary
A user equipment (UE) includes a transceiver and a processor that is configured to identify a plurality of flows corresponding to data to be sent in an uplink (UL) direction. The processor is also configured to map a subset of the plurality of flows to a logical channel (LCH) of a plurality of LCHs. The processor is further configured to multiplex two or more scheduling requests (SRs) into an integrated SR for requesting one or more physical uplink control channel (PUCCH) resources corresponding to each flow of the subset of the plurality of flows of at least one LCH of the plurality of LCHs. Each SR included in the integrated SR corresponds to an SR for the data associated with at least one flow of the subset of the plurality of flows.