PDU Set Delay Status Reporting for Accurate Uplink Scheduling
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Solution Overview
Problem
Current wireless communication systems lack mechanisms for accurate buffer delay awareness in uplink PDU set scheduling due to mismatched configured grants and buffer status report transmissions, leading to inefficient resource allocation and potential delay in XR and cloud gaming services.
Innovation Solution
A mechanism is introduced for a delay status report associated with PDU sets, enabling UE to determine and transmit delay information such as remaining PDU set delay budget, buffer delay, and arrival timing to the network, facilitating improved scheduling and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If configured grants and buffer status report transmissions are used without delay status reporting, then device complexity is reduced, but scheduling accuracy and resource allocation efficiency deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where the UE reports delay status information (remaining delay budget, buffer delay, arrival timing) to the network. This feedback enables the network to accurately assess buffer status and make informed scheduling decisions, resolving the contradiction by providing precise measurement data without requiring complex scheduling mechanisms at the UE side.
Solution Approach 2:
The delay status report acts as an intermediary information carrier between the UE buffer status and the network scheduler. Instead of directly implementing complex scheduling mechanisms, the patent introduces this intermediate reporting layer that conveys critical delay information, enabling accurate resource allocation with simpler device complexity.
2Measurement precision
If delay status reports are transmitted frequently, then scheduling accuracy improves, but network overhead and resource consumption increase
Solution Approach 1:
The patent reports only the critical delay status information (remaining delay budget, buffer delay, arrival timing) rather than complete buffer status details. This partial reporting approach provides sufficient scheduling accuracy while minimizing the amount of data transmitted, thus reducing network overhead and energy consumption.
Solution Approach 2:
The patent changes the reporting parameters from traditional buffer status indicators to delay-centric parameters (remaining delay budget, buffer delay, arrival timing). This parameter transformation enables more efficient resource allocation with reduced reporting overhead, as the network can directly use these delay parameters for scheduling decisions without additional processing.
3Productivity
If delay information is reported for all PDU sets, then resource allocation efficiency improves, but message size and processing overhead increase
Solution Approach 1:
The patent extracts and reports only the most critical delay information elements (remaining delay budget, buffer delay, arrival timing) from the complete PDU set status. This selective extraction provides the network with sufficient information for efficient resource allocation while keeping the report size manageable and processing overhead low.
Solution Approach 2:
The patent segments the delay information reporting by focusing on specific critical parameters rather than reporting all possible PDU set details. This segmentation approach allows the network to allocate resources efficiently based on the most important delay metrics while minimizing information overhead.
Data Source
AI summary
Embodiments of the subject application relate to methods and apparatuses for a delay status report associated with a protocol data unit (PDU) set. According to an embodiment of the subject application, a user equipment (UE) includes a processor and a transceiver coupled to the processor, and the processor is configured to: determine delay information associated with one or more protocol data unit (PDU) sets received from an upper layer of the UE, wherein the delay information includes at least one of: a remaining PDU set delay budget; a PDU set buffer delay; a PDU set delay budget offset; or first timing when receiving a PDU within the one or more PDU sets from the upper layer; and transmit a report including the delay information, wherein the report is at least one of: a delay budget report (DBR); a delay report (DR); an arriving timing report (ATR); or an enhanced buffer status report (EBSR).