Joint BWP and SSSG Switching for 5G UE Power Savings
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Solution Overview
Problem
Current 5G NR systems face challenges in efficiently managing search space set group switching and bandwidth part switching, particularly in unlicensed bands, leading to suboptimal power savings and performance due to incomplete or absent indications for UE monitoring configurations.
Innovation Solution
The implementation of a joint operation for search space set group switching and bandwidth part switching, where the UE can switch between search space sets and bandwidth parts based on downlink monitoring configurations, even with incomplete or absent indications, by using dynamic PDCCH monitoring switching mechanisms and RRC configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If separate indications are provided for BWP switching and SSSG switching, then the UE can accurately determine monitoring configurations, but the signaling overhead increases and power savings are reduced
Solution Approach 1:
The patent combines BWP switching indication and SSSG switching indication into a single unified indication mechanism. When a BWP switch is indicated, the UE automatically applies the associated SSSG configuration from the target BWP's downlink monitoring configuration, eliminating the need for separate SSSG switching indications and reducing signaling overhead while maintaining complete monitoring configuration information.
Solution Approach 2:
The downlink monitoring configuration is designed to serve multiple functions simultaneously: it contains both BWP switching information and SSSG switching information. This multi-functional configuration allows a single indication to accomplish both bandwidth part switching and search space set group switching, reducing the total number of indications required and thereby saving UE power.
2Loss of energy
If joint operation of BWP switching and SSSG switching is implemented, then signaling overhead is reduced and power savings improve, but the system complexity increases
Solution Approach 1:
The network pre-configures multiple BWPs with associated downlink monitoring configurations that include SSSG settings before operation. When BWP switching is triggered, the UE already has the SSSG configuration ready in the target BWP's downlink monitoring configuration, eliminating the need for complex real-time SSSG switching logic and reducing implementation complexity while maintaining power savings benefits.
3Productivity
If the UE monitors multiple SSSGs in the second BWP, then channel access opportunities improve, but the processing complexity and power consumption increase
Solution Approach 1:
The system dynamically switches between different SSSG configurations based on the active BWP. When the UE switches to the second BWP, it activates the corresponding downlink monitoring configuration that specifies which SSSG to monitor. This dynamic adaptation allows the UE to monitor multiple SSSGs when needed for channel access while avoiding continuous monitoring of all SSSGs, thereby balancing productivity improvement with power consumption control.
Data Source
AI summary
Aspects are provided that allow a user equipment (UE) to facilitate a joint operation of search space set group switching and bandwidth part switching. The UE may switch from a first bandwidth part (BWP) to a second BWP. The UE also may monitor a first search space set group (SSSG) in the second BWP during a scheduled monitoring occasion based on a downlink monitoring configuration.