Dynamic SPS Resource Indication for 5G XR Transmission Delay
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Solution Overview
Problem
Traditional semi-persistent scheduling (SPS) methods for extended reality (XR) services in 5G communication systems suffer from large transmission delays.
Innovation Solution
The proposed solution involves configuring dynamic resource indication information associated with SPS for terminals, and indicating dynamic data transmission using this information during discontinuous reception (DRX)-off periods. This includes using downlink control information (DCI) signaling for resource allocation and dynamically adjusting monitoring position information for DCI signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional semi-persistent scheduling (SPS) is used for XR service transmission, then periodic data transmission can be achieved without scheduling requests, but transmission delay becomes large
Solution Approach 1:
The patent applies dynamics by transitioning from static SPS resource allocation to dynamic scheduling. The network device determines whether to send SPS PDSCH based on buffer status, and the terminal monitors for DCI formats during DRX-off periods to receive dynamic scheduling decisions. This dynamic approach allows the system to adapt resource allocation to actual data arrival patterns, reducing transmission delay while maintaining efficiency.
Solution Approach 2:
The patent implements preliminary action by having the terminal pre-configure monitoring positions for DCI formats during DRX-off periods before actual data transmission occurs. The terminal also pre-configures SPS PDSCH reception parameters. When data arrives early, the terminal is already prepared to receive and process the DCI and SPS PDSCH without waiting for the next scheduled DRX-on period, thus reducing transmission delay.
2Loss of time
If SPS scheduling is applied during DRX-off period, then transmission delay is reduced, but device complexity increases due to dynamic resource indication and monitoring configuration
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the monitoring position parameters for DCI formats based on actual transmission needs. The network device can configure different monitoring positions, time offsets, and window durations for DCI monitoring during DRX-off periods. This allows flexible adaptation to varying data arrival patterns and transmission requirements while maintaining manageable complexity through standardized parameter configurations.
Solution Approach 2:
The patent implements universality by designing the DCI format to serve multiple functions: it can indicate both dynamic scheduling decisions and SPS PDSCH activation/cancellation. The same monitoring mechanism handles both early data arrival scenarios and normal SPS operation. This multi-functionality reduces the need for separate complex mechanisms, thereby controlling overall device complexity while enabling delayed reduction.
3Adaptability or versatility
If dynamic monitoring position information is configured for DCI signaling, then resource allocation flexibility is improved, but information processing overhead increases
Solution Approach 1:
The patent applies partial action by configuring dynamic monitoring position information only when needed for early data transmission during DRX-off periods. For normal periodic SPS transmission during DRX-on periods, the terminal uses pre-configured monitoring positions without additional dynamic signaling. This selective application of dynamic monitoring configuration reduces overall signaling overhead while maintaining resource allocation flexibility when required.
Data Source
AI summary
Embodiments of the present disclosure provide a dynamic data transmission method and apparatus, and a storage medium. The method comprises: configuring, for a terminal, dynamic resource indication information associated with semi-persistent scheduling (SPS); and performing dynamic data transmission indication by using the dynamic resource indication information in a discontinuous reception off (DRX-off) period. According to the dynamic data transmission method and apparatus, and the storage medium provided in the embodiments of the present disclosure, during the DRX-off period, SPS PDSCH transmission is assisted by means of dynamic scheduling, and in the case that a data packet is relatively large but reserved SPS PDSCH resources are insufficient, the transmission of the data packet is assisted, without waiting for the next SPS PDSCH or a DRX-on period, thereby reducing the transmission delay.