Search Space Set Activation for UE Power Management
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Solution Overview
Problem
Current wireless communication systems lack a mechanism to activate deactivated search spaces (SS) in user equipment (UE), leading to inefficient power consumption and inability to adapt to changing communication needs.
Innovation Solution
A method and system that allow user equipment (UE) to activate deactivated search spaces (SS) based on received Downlink Control Information (DCI) and a mapping that associates SS sets with DCI types, formats, or transmission directions, enabling dynamic adjustment of PDCCH monitoring occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continuously monitors all configured search space sets, then the UE can receive all downlink control information, but the power consumption increases significantly
Solution Approach 1:
The patent implements dynamic search space set activation where the UE can switch between active and inactive states for different search space sets. The network can activate or deactivate specific search space sets via MAC CE commands, allowing the UE to monitor only necessary PDCCH occasions while saving power when full monitoring is not required.
Solution Approach 2:
The patent divides the search space monitoring into multiple independent search space sets that can be individually activated or deactivated. Each search space set can be controlled separately, allowing selective monitoring of control channels based on current network conditions and UE requirements.
2Use of energy by moving object
If the UE deactivates search space sets to save power, then the power consumption decreases, but the ability to respond to changing communication needs is reduced
Solution Approach 1:
The patent implements a feedback mechanism where the network can send activation/deactivation commands to the UE based on current communication requirements. The network monitors UE behavior and traffic patterns, then dynamically adjusts which search space sets should be active to maintain adaptability while optimizing power consumption.
Solution Approach 2:
The patent pre-configures multiple search space sets with different monitoring parameters before operation. When communication needs change, the network can quickly activate pre-configured search space sets without requiring full reconfiguration, enabling rapid adaptation to changing conditions.
3Use of energy by moving object
If the UE monitors fewer search space sets, then the power consumption is reduced, but the latency to receive critical control information increases
Solution Approach 1:
The patent applies different monitoring strategies to different search space sets based on their specific purposes. Critical search space sets (e.g., those for system information or urgent scheduling) are kept active with frequent monitoring, while less critical sets can be deactivated or monitored less frequently, optimizing the balance between power consumption and latency for different control information types.
Data Source
AI summary
Disclosed are various techniques for wireless communication. In an aspect, a user equipment (UE) may monitor a physical downlink control channel (PDCCH) monitoring occasion defined by an active search space (SS) set. The UE may receive, during the PDCCH monitoring occasion, a downlink control information (DCI). In response, the UE may activate at least one deactivated SS set based on the DCI and a mapping that associates an SS set to a DCI type, DCI format, transmission direction, or specific combinations thereof. In another aspect, a UE may monitor a subset less than all of PDCCH monitoring occasions defined by an active SS set. The UE may receive, during a PDCCH monitoring occasion, a DCI. In response, the UE may monitor a larger number of PDCCH monitoring occasions defined by the active SS set.