DRX-SPS State Switching for XR PDSCH Reception
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Solution Overview
Problem
Existing wireless communication systems face challenges in accurately and efficiently transmitting and receiving signals, particularly in environments with diverse communication services and varying user demands.
Innovation Solution
Implementing a method that includes discontinuous reception (DRX) and semi-persistent scheduling (SPS) configurations, with the SPS configuration switching to an inactive pending state during DRX off-durations, and reactivating based on wake-up signals (WUS) to optimize signal transmission and reception for eXtended Reality (XR) traffic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If DRX and SPS configurations are used together for XR traffic, then power saving and efficient signal reception are improved, but the complexity of managing configuration states increases
Solution Approach 1:
The patent segments the SPS configuration into distinct states (active, inactive pending, inactive released) to manage the complexity of DRX-SPS interaction. This segmentation allows the UE to track configuration status more effectively, resolving the contradiction between power saving benefits and state management complexity.
Solution Approach 2:
The patent introduces dynamic state transitions for the SPS configuration based on DRX timing and received signals. The configuration automatically transitions between active and inactive pending states according to DRX off-durations and on-durations, enabling adaptive power management without manual intervention.
2Loss of energy
If SPS configuration switches to inactive pending state during DRX off-duration, then power consumption is reduced, but signal reception accuracy may be affected
Solution Approach 1:
The patent implements feedback mechanisms where the UE monitors for wake-up signals during DRX off-durations. If a wake-up signal is detected, the SPS configuration transitions from inactive pending to active state, ensuring accurate signal reception when needed while maintaining power savings during off-periods.
Solution Approach 2:
The patent prepares the SPS configuration in advance by transitioning it to inactive pending state before actual signal reception is needed. This preliminary action allows the UE to save power while maintaining the ability to quickly activate reception when wake-up signals indicate incoming traffic.
3Loss of energy
If SPS configuration is re-activated in next DRX on-duration, then power saving efficiency is improved, but time delay in signal reception increases
Solution Approach 1:
The patent leverages the periodic nature of DRX cycles to manage SPS configuration activation. By systematically re-activating the configuration at the start of each DRX on-duration, the system achieves predictable power saving patterns while minimizing reception delays through regular timing.
Solution Approach 2:
The patent activates the SPS configuration at the beginning of the DRX on-duration before actual signal reception occurs. This preliminary activation ensures that the configuration is ready for immediate use, reducing any potential time delay while maintaining power saving efficiency.
Data Source
AI summary
A method by which a terminal receives a signal in a wireless communication system, according to an embodiment, comprises: receiving a discontinuous reception (DRX) configuration and a semi-persistent scheduling (SPS) configuration; and receiving an SPS physical downlink shared channel (PDSCH) that is based on the SPS configuration, wherein the SPS PDSCH may include eXtended reality (XR) traffic, and the SPS configuration may switch to an inactive pending state in a DRX off-duration of each DRX cycle that is based on the DRX configuration.