Multi-Link Dormancy Signaling for UE Power Management
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Solution Overview
Problem
Current mobile communication systems lack clear definitions and signaling mechanisms for transitioning between power saving operations and multi-link operations, leading to inefficiencies in power consumption management for user equipment (UE) in LTE and NR networks.
Innovation Solution
Implementing physical layer signaling to indicate transitions between power saving and multi-link operations, allowing user equipment to switch between dormancy states and active states on network nodes, thereby optimizing power consumption by explicitly defining the behaviors and conditions for these transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-link operation is implemented to increase system capacity and transmission efficiency, then data transfer capability is improved, but power consumption of the UE increases
Solution Approach 1:
The patent implements dynamic state transitions for UE between active and dormant states on different links. The UE can be configured with multiple links and dynamically switch between active state (monitoring PDCCH) and dormant state (not monitoring PDCCH) based on data transmission requirements, allowing the system to adapt power consumption levels to actual productivity needs
Solution Approach 2:
The patent changes the operational parameter of link monitoring by introducing dormant state as a intermediate state between active and inactive. In dormant state, the UE does not monitor PDCCH but maintains the ability to quickly transition to active state, effectively changing the monitoring parameter from continuous to conditional, thus reducing power consumption while maintaining data transfer capability when needed
2Use of energy by moving object
If the UE stays in sleep mode for power saving, then power consumption is reduced, but the ability to receive data transmission promptly deteriorates
Solution Approach 1:
The patent applies preliminary action by configuring the UE with multiple links in advance, where at least one link remains in active state while others can be dormant. This preliminary configuration allows the UE to be ready for data reception on active links while maintaining power-saving dormant state on other links, achieving both power reduction and quick data reception capability
3Productivity
If the UE monitors multiple links for data reception, then data transfer efficiency is improved, but power consumption increases
Solution Approach 1:
The patent applies local quality by allowing different links to have different operational states (active or dormant) based on local data transmission requirements. Each link can independently be configured as active (monitoring PDCCH) or dormant (not monitoring PDCCH), enabling the UE to monitor multiple links for efficiency while reducing power consumption by keeping some links in dormant state when full monitoring is not needed
Data Source
AI summary
Various solutions for power consumption reduction with multi-link operation with respect to user equipment and network apparatus in mobile communications are described. An apparatus may establish a first link with a first network node. The apparatus may establish a second link with a second network node. The apparatus may receive a dormancy indication via a physical layer signaling from the first network node. The apparatus may transit a dormancy state of the second network node according to the dormancy indication.