PDCCH Skipping and Cell DTX Configuration for Wireless Energy Saving
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing cell DTX (discontinuous transmission) configurations for network energy saving, particularly in scenarios where UE DRX (discontinuous reception) is configured, leading to potential misdetections of DCI (Downlink Control Information) indicating activation and deactivation of cell DTX.
Innovation Solution
The proposed solution involves implementing PDCCH skipping operations in conjunction with cell DTX configurations for network energy saving, even when UE DRX is configured. This approach enhances the accuracy of DCI detection and improves the management of cell DTX states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If cell DTX configuration is implemented for network energy saving, then energy efficiency is improved, but the reliability of DCI detection deteriorates due to potential misdetections
Solution Approach 1:
The patent implements feedback mechanisms where the UE reports PDCCH skipping status and DCI detection results to the network. This feedback loop allows the network to adjust DTX configurations based on actual detection reliability, resolving the contradiction between energy saving and detection accuracy.
Solution Approach 2:
The patent introduces dynamic adjustment of cell DTX configurations based on real-time channel conditions and UE status. The network can activate or deactivate DTX mode dynamically, allowing the system to adapt between energy saving mode and high reliability detection mode as needed.
2Use of energy by moving object
If PDCCH skipping is implemented for energy saving, then energy consumption is reduced, but the complexity of managing cell states increases
Solution Approach 1:
The patent segments the cell state management into distinct states (e.g., active state, DTX state, transition state) with clear definitions and transition rules. This segmentation simplifies the complexity by providing structured state management rather than monolithic control.
Solution Approach 2:
The patent implements self-service mechanisms where the UE autonomously manages its own state transitions and PDCCH skipping based on configured parameters. The UE automatically handles state transitions without requiring complex network control, reducing overall system complexity.
3Loss of energy
If cell DTX is configured with PDCCH skipping, then network energy saving is enhanced, but the difficulty of detecting and measuring DCI increases
Solution Approach 1:
The patent implements preliminary actions where the network sends advance notifications and configurations before actual DTX periods. This allows the UE to prepare for upcoming PDCCH skipping events, making the detection process more manageable and reducing the difficulty of measuring and detecting DCI during transition periods.
Data Source
AI summary
A method can include receiving one or more radio resource control (RRC) messages. The messages can include physical downlink control channel (PDCCH) skipping durations; parameters of cell discontinuous transmission (cell DTX) configuration; and other parameters of a PDCCH for a downlink control information (DCI) indicating an activation/deactivation of the cell DTX configuration. The method can also include receiving, based on the other parameters, a DCI indicating the activation of the Cell DTX configuration comprising a cell DTX active time and a cell DTX inactive time. The method can further include receiving another DCI indicating a PDCCH skipping duration, of the PDCCH skipping durations. The method can additionally include starting PDCCH skipping after receiving the another DCI and terminating, in response to the cell DTX configuration being activated by the DCI, the PDCCH skipping when entering outside the cell DTX active time of the cell DTX configuration.