UE Capability-Based Application Delay for SSSG Switching
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Solution Overview
Problem
In Rel. 17 SSSG-switching, the UE's processing capability is not considered when determining the application delay for switching between search-space set groups, leading to potential misalignment between the UE and the network, which can result in missed PDCCHs.
Innovation Solution
The UE transmits capability information indicating support for advanced Pswitch time, and determines the application delay based on its processing capability and RRC configuration, ensuring synchronized switching with the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE transmits capability information indicating support for advanced Pswitch time, then the application delay determination becomes more accurate and synchronized with network expectations, but the device complexity and signaling overhead increase
Solution Approach 1:
The UE transmits capability information about advanced Pswitch time support in advance, before actual SSSG switching occurs. This preliminary indication allows the network to configure appropriate application delays that match the UE's processing capabilities, ensuring synchronized operation without requiring complex real-time negotiations.
2Manufacturing precision
If the UE determines application delay based on processing capability and RRC configuration, then the switching timing becomes precise and avoids missed PDCCHs, but the processing complexity and time required for delay determination increase
Solution Approach 1:
The application delay determination is segmented into distinct components: UE processing capability assessment, RRC configuration parameters, and Pswitch time calculations. Each component is handled separately based on predefined tables and configurations, which simplifies the overall process while maintaining high precision in the final switching timing.
Solution Approach 2:
The UE changes the application delay parameter based on its processing capability level (capability 1 or capability 2) and the configured Pswitch time values from RRC configuration. By selecting appropriate parameter values from predefined sets, the UE achieves precise delay determination without requiring complex real-time calculations.
3Reliability
If the UE monitors PDCCH candidates according to dense SSSG during data bursts, then the reliability of data reception improves, but the energy consumption increases
Solution Approach 1:
The UE dynamically switches between different SSSG configurations based on data burst detection. During data bursts, the UE monitors PDCCH candidates according to dense SSSG to ensure reliable reception. When no data bursts are detected, the UE switches to sparse SSSG to reduce energy consumption. This dynamic adaptation is enabled by accurate application delay determination that ensures timely switching.
Data Source
AI summary
A method performed by a user equipment (UE) for search-space set group, SSSG, switching. The method includes transmitting UE capability information to a network node, where the transmitted UE capability information determines an application delay. The method further includes monitoring PDCCH candidates according to a first SSSG. Furthermore, the method includes receiving an indication, from the network node, to switch from monitoring PDCCH candidates according the first SSSG to monitor PDCCH candidates according to a second SSSG. Finally, the method includes monitoring PDCCH candidates according to a second SSSG after the application delay. There is also provided a UE, a network node and a method for the network node.