Selective DCI Monitoring in SI Windows to Cut UE Power Use
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Solution Overview
Problem
In the New Radio (NR) system, the energy consumption of user equipment is high due to the need to monitor all Physical Downlink Control Channel (PDCCH) monitoring occasions (MOs) within the system information (SI) window when the synchronization signal/PBCH block (SSB) corresponds to multiple MOs, as the existing methods do not allow for selective monitoring.
Innovation Solution
Implementing a method where the user equipment and network device select and agree on partial MOs within the SI window for monitoring or transmitting DCI, based on predefined rules or indication information, to reduce unnecessary energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If user equipment monitors all PDCCH monitoring occasions within the SI window, then DCI scheduling reliability is improved, but energy consumption increases
Solution Approach 1:
The patent segments the monitoring occasions into two categories: first monitoring occasions where DCI may be transmitted and second monitoring occasions where DCI is not transmitted. This segmentation allows the user equipment to selectively monitor only the first monitoring occasions, reducing energy consumption while maintaining DCI scheduling reliability through the predefined rule that ensures DCI is transmitted in at least one first monitoring occasion within each SI window.
Solution Approach 2:
The patent applies partial action by having the user equipment monitor only a subset of monitoring occasions (the first monitoring occasions) rather than all monitoring occasions within the SI window. The predefined rule ensures that monitoring these partial occasions is sufficient to receive DCI, as the network device is required to transmit DCI in at least one first monitoring occasion.
2Adaptability or versatility
If multiple monitoring occasions are configured for SSB, then DCI transmission flexibility is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by assigning different characteristics to different monitoring occasions. The first monitoring occasions are designated as locations where DCI may be transmitted, while the second monitoring occasions are designated as locations where DCI is not transmitted. This local differentiation simplifies the management complexity by providing clear rules for each type of monitoring occasion while maintaining overall flexibility.
Solution Approach 2:
The patent uses preliminary action by establishing predefined rules before the monitoring process begins. The network device and user equipment agree in advance on which monitoring occasions are first monitoring occasions and which are second monitoring occasions. This preliminary configuration reduces real-time decision complexity while maintaining transmission flexibility.
Data Source
AI summary
A method for monitoring downlink control information (DCI), including: monitoring in a case where a synchronization signal/PBCH block (SSB) corresponds to a plurality of monitoring occasions in each system information (SI) window, on partial monitoring occasions of the plurality of monitoring occasions corresponding to the SSB in the SI window, DCI configured for scheduling SI.