USS and CSS Slot Group Assignment for Control Channel Monitoring
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing user equipment (UE) specific search space (USS) and common search space (CSS) assignments for multiple slot-based control channel monitoring, which can lead to inefficiencies in resource allocation and interference management, particularly in 5G and NR networks, impacting data transmission and reception, and system performance.
Innovation Solution
The implementation of a UE-specific search space (USS) and common search space (CSS) assignment mechanism that configures different slot group sizes based on capability reports, allowing for optimized monitoring of downlink control channels, enhancing spectral efficiency and reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple slot-based control channel monitoring is implemented with separate USS and CSS assignments, then spectral efficiency is improved, but device complexity increases
Solution Approach 1:
The patent segments the control channel monitoring into two distinct search spaces: UE-specific search space (USS) and common search space (CSS). Each search space has independent configuration parameters including slot group sizes, monitoring occasions, and resource allocations. This segmentation allows optimized resource utilization for different types of control information, improving spectral efficiency while managing complexity through structured organization.
Solution Approach 2:
The patent implements dynamic configuration where the network entity can independently adjust USS and CSS parameters based on UE capability reports and current network conditions. The slot group sizes, monitoring periodicities, and resource allocations are dynamically adapted rather than fixed, enabling the system to optimize spectral efficiency in real-time while the UE adapts its monitoring behavior accordingly.
2Object-affected harmful factors
If separate slot group sizes are configured for USS and CSS, then interference management is improved, but configuration complexity increases
Solution Approach 1:
The patent applies different slot group size configurations specifically to different search space types: USS uses one slot group size optimized for UE-specific control information, while CSS uses a different slot group size optimized for common control information. This local differentiation allows interference management tailored to each search space's specific requirements without requiring complex global reconfiguration.
Solution Approach 2:
The patent changes the configuration parameters (slot group sizes, monitoring occasions, resource blocks) independently for USS and CSS based on UE capability reports and network conditions. By allowing separate parameter optimization for each search space type, the system improves interference management while the modular parameter structure keeps configuration complexity manageable through standardized configuration procedures.
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a network entity, a search space configuration indicating a first configuration for a UE specific search space (USS) that is associated with a first slot group size and a second configuration for a common search space (CSS) that is associated with a second slot group size. The UE may receive, from the network entity, a communication via a downlink control channel based at least in part on monitoring the downlink control channel in accordance with the search space configuration. Numerous other aspects are described.