CSI-RS Validation with Contention-Exempt SSBs
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Solution Overview
Problem
Existing wireless communication systems face challenges in validating channel state information reference signals (CSI-RS) due to failure to account for contention-exempt synchronization signal blocks (SSBs), leading to decreased opportunities for user equipment (UE) to monitor and receive CSI-RS, resulting in delayed or missed downlink transmissions.
Innovation Solution
The proposed solution involves accounting for contention-exempt SSBs in CSI-RS validation rules, allowing user equipment (UE) to monitor for CSI-RS even when configured within time frames associated with contention-exempt SSBs, by receiving indications of exempt SSBs and determining valid time periods for monitoring based on overlaps with allocated CSI-RS time periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If CSI-RS is configured to occur within time frames associated with contention-exempt SSBs, then the opportunities for UE to monitor and receive CSI-RS increase, but the validation of CSI-RS becomes complex due to overlap with SSB time periods
Solution Approach 1:
The patent segments the time frame into distinct time periods: SSB time periods (where contention-exempt SSBs are transmitted) and non-SSB time periods. By dividing the validation logic into these segments, the system can apply different validation rules to each segment, simplifying the overall validation process while allowing CSI-RS to be monitored in both SSB and non-SSB time periods.
Solution Approach 2:
The patent introduces dynamic validation rules that adapt based on whether the current time period overlaps with SSB time periods. The validation is dynamically adjusted by checking the overlap between configured CSI-RS time periods and SSB time periods, allowing flexible monitoring opportunities without requiring a complete redesign of the validation mechanism.
2Productivity
If traditional CSI-RS validation rules are applied without accounting for contention-exempt SSBs, then the validation process remains simple, but UE monitoring opportunities are decreased leading to delayed downlink transmissions
Solution Approach 1:
The patent performs preliminary validation by checking the overlap between configured CSI-RS time periods and SSB time periods before the actual CSI-RS transmission. This preliminary action identifies valid monitoring opportunities in advance, ensuring that UE can monitor CSI-RS without delay while accounting for contention-exempt SSB transmissions.
3Use of energy by moving object
If UE monitors for CSI-RS in all configured time periods without validation, then monitoring opportunities are maximized, but power consumption increases due to unnecessary monitoring
Solution Approach 1:
The patent enables UE to self-determine valid monitoring opportunities by providing the UE with SSB time period information and configured CSI-RS time periods. The UE autonomously performs the overlap check to identify valid monitoring time periods, eliminating the need for continuous monitoring in all configured periods and reducing power consumption while maintaining monitoring efficiency.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described to support accounting for contention-exempt synchronization signal blocks (SSBs) when validating one or more channel state information reference signals (CSI-RS). A base station may transmit, to a user equipment (UE), an indication of the one or more contention-exempt SSBs, and the UE may determine to monitor for a configured CSI-RS if resources assigned to the CSI-RS fall within a time frame associated with the one or more contention-exempt SSBs. Similarly, the base station may transmit configured CSI-RS if resources assigned to the CSI-RS fall within a time frame associated with the one or more contention-exempt SSBs. The time frame associated with the one or more contention-exempt SSBs may include a slot that includes the SSB(s), a symbol that includes the SSB(s), symbols between the SSB(s), slots between the SSB(s), or any combination thereof.