5G PDCCH DCI Monitoring for 6G RAT Segmentation
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Solution Overview
Problem
In wireless communication systems, distinguishing between 5G and 6G downlink control information (DCI) transmitted over a 5G physical downlink control channel (PDCCH) is challenging due to the different radio spectrum usage and reliability of the two technologies.
Innovation Solution
A user equipment (UE) receives DCI for both 5G and 6G RATs in a downlink control channel communicated via the 5G RAT, using DCI monitoring to determine whether the DCI is associated with the 5G or 6G RAT. This involves monitoring different search spaces, control resource sets, radio network temporary identifiers, DCI lengths, indication fields, capability parameters, and wake-up signals associated with the 5G PDCCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If 6G RAT expands spectrum usage to include lower frequencies used by 5G RAT to ensure reliable DCI transmission, then reliability of DCI communication is improved, but difficulty in distinguishing between 5G DCI and 6G DCI transmitted over 5G PDCCH increases
Solution Approach 1:
The patent segments the downlink control information by creating separate search space sets for 5G DCI and 6G DCI within the 5G PDCCH. The UE is configured to monitor specific search space sets that are associated with either 5G or 6G RAT, allowing the network to transmit different DCI types in a segmented manner that maintains reliability while enabling clear distinction between RATs.
Solution Approach 2:
The patent applies local quality by associating specific properties with specific search space sets. Each search space set is configured with specific parameters (such as monitoring occasions, aggregation levels, and RNTI associations) that are locally optimized for either 5G or 6G DCI transmission. This allows the network to transmit 6G DCI over 5G PDCCH with local modifications that maintain 6G reliability requirements while enabling distinction from 5G DCI.
2Adaptability or versatility
If multiple search space sets and monitoring configurations are implemented to distinguish between 5G and 6G DCI, then ability to differentiate RATs is improved, but device complexity increases
Solution Approach 1:
The patent implements universality by designing a search space set configuration framework that can serve multiple purposes. The same search space set configuration mechanism is used for both 5G and 6G DCI transmission, allowing the UE to use a unified monitoring procedure that adapts to different RATs. The RNTI-based association provides a universal method for the UE to identify which search space sets are relevant for which RAT, reducing the need for separate handling mechanisms.
Solution Approach 2:
The patent applies preliminary action by configuring the UE with search space set associations and RNTI mappings before DCI transmission occurs. The network provides RRC configuration that pre-establishes which search space sets are associated with which RAT and which RNTIs should be used for monitoring. This preliminary configuration allows the UE to efficiently differentiate between 5G and 6G DCI during actual transmission without requiring complex real-time analysis.
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. The techniques described herein relate to control signaling for multiple radio access technology (RAT) carrier aggregation. A user equipment (UE) receives downlink control information (DCI) for a first RAT (e.g., 5G) and/or a second RAT (e.g., 6G), in a downlink control channel of the first RAT. The UE determines whether the DCI is associated with the first RAT or the second RAT by monitoring different search spaces, different control resource sets (CORESETs), different radio network temporary identifiers (RNTIs), different DCI lengths, different indication fields of the DCI, different capability parameters, and/or wake-up signals, that are associated with the downlink control channel communicated via the first RAT. The UE 115 communicates via the second RAT based on receiving the DCI.