Reduced Subcarrier Spacing Window for Wireless UE
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Solution Overview
Problem
Current wireless communication systems face complexity in managing multiple subcarrier spacing (SCS) configurations, particularly in switching between different SCS for downlink transmissions, which can increase the complexity of base station transceivers and reduce efficiency.
Innovation Solution
A method and apparatus for user equipment (UE) to switch between monitoring frequency resources using different SCS by transmitting an indication of capability to switch from a first SCS to a second SCS, with the base station configuring the UE to switch based on received signaling, allowing for reduced SCS windows to decrease transceiver complexity while maintaining efficient downlink transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the base station transmits downlink transmissions with different SCS simultaneously, then the system supports multiple communication scenarios and maintains efficient downlink transmissions, but the complexity of the base station transceiver increases
Solution Approach 1:
The base station dynamically switches between different SCS configurations based on communication requirements. The transceiver can operate with a first SCS for general downlink transmissions and switch to a second SCS for specific transmissions (e.g., SSB), reducing the need for simultaneous multi-SCS support while maintaining adaptability across different communication scenarios
Solution Approach 2:
The downlink transmissions are segmented into different types with different SCS requirements. The base station applies different SCS to different transmission categories (e.g., PDSCH/PDCCH with first SCS, SSB with second SCS), allowing optimized handling of each segment while managing overall transceiver complexity
2Productivity
If the UE switches between monitoring frequency resources with different SCS, then the system enables efficient downlink transmissions with varying SCS, but the switching time and complexity increase
Solution Approach 1:
The UE is pre-configured with multiple SCS configurations and the capability to switch between them. The base station provides advance indication of upcoming SCS changes, allowing the UE to prepare for switching in advance, thereby reducing the actual switching time and maintaining continuous monitoring efficiency
Solution Approach 2:
The system changes the SCS parameter dynamically based on transmission requirements. The UE monitors frequency resources with different SCS values (e.g., 120 kHz for PDSCH/PDCCH, 480 kHz for SSB) according to base station configuration, enabling efficient adaptation to different downlink transmission scenarios without permanent complexity increases
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. For example, a user equipment (UE) may transmit, to a base station, an indication of a capability of the UE to switch from monitoring a set of frequency resources according to a first subcarrier spacing (SCS) to monitoring the set of frequency resources according to a second SCS, less than the first SCS. The indication may indicate an amount of time for the UE to switch between SCSs. The UE may receive, from the base station, signaling that indicates a configuration for monitoring the set of frequency resources according to the second SCS (e.g., a configuration for a reduced SCS window). The UE may switch from monitoring the set of frequency resources according to the first SCS to monitoring the set of frequency resources according to the second SCS based on receiving the configuration for monitoring the set of frequency resources.