DRX/DTX-Aligned SPS Configuration for Lower Wireless Latency
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Solution Overview
Problem
Current cell DRX and DTX operations in wireless communication systems lead to misalignment of periodically and semi-persistently scheduled transmission occasions with active durations, resulting in inefficient communication, increased latency, and non-uniform scheduling opportunities, which negatively impact network performance.
Innovation Solution
Align periodic and semi-persistent signal or channel transmission occasions within cell DRX and DTX cycles by obtaining signal configurations with defined periodicity and offset information, allowing communication during active times and adapting to current network conditions or traffic demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If periodic and semi-persistent signal transmission occasions are configured independently of cell DRX/DTX cycles, then device complexity and configuration flexibility are maintained, but communication efficiency deteriorates and latency increases due to misalignment
Solution Approach 1:
The patent merges the configuration of periodic/semi-persistent signal transmission occasions with cell DRX/DTX cycles by defining their periodicity and offset relative to a common reference time (e.g., SSB transmission time). This integration ensures that signal transmissions automatically align with active durations of cell DRX/DTX cycles, improving communication efficiency without requiring separate complex configuration mechanisms.
2Loss of energy
If transmission occasions are misaligned with cell DRX/DTX active durations, then configuration simplicity is maintained, but energy-saving performance deteriorates due to unnecessary transmissions during inactive periods
Solution Approach 1:
The patent applies preliminary action by pre-configuring the periodicity and offset of transmission occasions relative to the cell DRX/DTX cycle reference time. This advance configuration ensures that transmissions are automatically scheduled within active durations, preventing energy waste during inactive periods while avoiding latency issues that would arise from dynamic realignment.
3Productivity
If periodic transmission occasions are aligned with cell DRX/DTX cycles using reference time, then communication efficiency improves, but scheduling flexibility is reduced
Solution Approach 1:
The patent maintains scheduling flexibility through parameter changes by allowing the network to configure different periodicity values and offset values for different signals and channels. The reference time framework provides a consistent basis for alignment, while the configurable parameters enable adaptation to various traffic patterns and service requirements without compromising communication efficiency.
Data Source
AI summary
This disclosure provides methods, components, devices, and systems for enhancing communication efficiency and energy-saving in wireless networks by aligning periodic transmission occasions, including semi-persistently scheduled (SPS) periodic occasions, within cell Discontinuous Reception (DRX) and Discontinuous Transmission (DTX) cycles. Some aspects more specifically relate to user equipment (UE) obtaining a signal configuration from a network entity indicating periodicity and offset information for a signal or channel. In some examples, the periodicity and offset information is configured to align periodic transmission occasions of the signal or channel within an on duration of a cell DRX cycle or cell DTX cycle, beginning with respect to a reference time associated with the cell DRX cycle or cell DTX cycle. The UE may then efficiently communicate the signal or data in the channel with the network entity within the on duration according to the periodicity and offset information with reduced latency, improving network performance.