PDCCH Monitoring Configuration via Search Space Set Group Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In 5G NR wireless communication systems, the reduced slot length due to higher subcarrier spacing leads to reduced scheduling flexibility and potential interruptions in service when switching between bandwidth parts, as existing PDCCH monitoring methods struggle to efficiently manage PDCCH candidates and control channel elements.
Innovation Solution
Implementing a PDCCH monitoring configuration associated with a search space set group, allowing for faster switching between monitoring configurations without service interruptions, by enabling the user equipment (UE) to apply different PDCCH monitoring modes based on search space set group switches rather than bandwidth part switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If higher subcarrier spacing is used to increase data rate, then data transmission speed is improved, but slot length is reduced leading to reduced scheduling flexibility
Solution Approach 1:
The patent divides search space sets into multiple groups (first search space set group and second search space set group), each associated with different PDCCH monitoring capabilities. This segmentation allows the system to switch between different monitoring configurations without changing bandwidth parts, thereby maintaining scheduling flexibility even with higher subcarrier spacing and reduced slot lengths.
Solution Approach 2:
The patent enables dynamic switching between different PDCCH monitoring capabilities by switching between search space set groups. The UE can be configured with multiple search space set groups and switch between them based on scheduling requirements, allowing the system to adapt to varying data rate requirements while maintaining flexibility in resource allocation.
2Adaptability or versatility
If bandwidth part switching is performed to change PDCCH monitoring mode, then monitoring capability is adapted, but service interruptions occur
Solution Approach 1:
The patent segments search space sets into different groups, each with distinct PDCCH monitoring capabilities. This allows the UE to switch between monitoring modes by selecting different search space set groups without requiring bandwidth part switching, thereby avoiding service interruptions while adapting monitoring capability to current needs.
Solution Approach 2:
The patent introduces search space set group switching as an intermediary mechanism between the UE and the network for adapting PDCCH monitoring capabilities. Instead of directly switching bandwidth parts (which causes service interruption), the system uses search space set group configuration and switching as an intermediate layer that enables capability adaptation while maintaining continuous service.
3Adaptability or versatility
If multiple search space set groups are configured for different PDCCH monitoring capabilities, then scheduling flexibility is improved, but device complexity increases
Solution Approach 1:
The patent makes search space set groups multi-functional by associating each group with specific PDCCH monitoring capabilities. A single search space set group configuration can serve multiple purposes: defining search spaces, specifying monitoring capabilities, and enabling switching between different operational modes. This universality reduces the need for separate configurations for each capability level.
Solution Approach 2:
The patent manages complexity by parameterizing the search space set group configurations, where each group is defined by a set of parameters including monitoring capability indicators. The network can configure multiple groups with different parameter sets, and the UE selects appropriate groups based on current scheduling requirements, avoiding the need for complex real-time calculations while maintaining flexibility.
Data Source
AI summary
A user equipment (UE) transmits, to a base station, an indication of a capability for physical downlink control channel (PDCCH) monitoring. The UE receives, from the base station, a configuration of a plurality of search space set groups based on the capability. The apparatus then monitors PDCCH candidates for a PDCCH from the base station based on a search space set group and the configuration. A base station receives, from a UE, an indication of a capability for PDCCH monitoring and transmits, to the UE, a configuration of a plurality of search space set groups based on the capability. The apparatus transmits a PDCCH to the UE based on the search space set group and the configuration associated with the search space set group.