Reduced-Capability WTRU CORESET Switching for SIB Reception
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing reduced bandwidth for reduced capability WTRUs, particularly in acquiring time and frequency synchronization and detecting cell IDs, which affects system information acquisition and PDCCH monitoring.
Innovation Solution
Implementing advanced multiplexing techniques for synchronization signals and PDCCH candidates, such as RC-CORESET0 with RMSI PDSCH, to optimize PDCCH monitoring and enhance system information reception in reduced capability WTRUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If reduced bandwidth is implemented for reduced capability WTRUs, then bandwidth requirements are reduced, but system information acquisition efficiency deteriorates
Solution Approach 1:
The patent segments the PDCCH monitoring task by introducing separate search spaces (first search space for reduced capability WTRUs, second search space for full capability WTRUs) with different sets of candidates. This allows reduced capability WTRUs to monitor only a subset of PDCCH candidates, reducing bandwidth requirements while maintaining necessary system information acquisition through targeted segmentation of the monitoring function.
Solution Approach 2:
The patent applies local quality by providing different PDCCH candidate sets tailored to different WTRU capabilities. Reduced capability WTRUs receive a first set of candidates optimized for their limitations, while full capability WTRUs receive a second set. This localized optimization ensures each WTRU type receives appropriate monitoring parameters matched to their specific capabilities, improving acquisition efficiency within the constrained bandwidth.
2Productivity
If PDCCH monitoring is optimized for reduced capability WTRUs, then monitoring efficiency improves, but measurement precision for cell ID detection deteriorates
Solution Approach 1:
The patent implements preliminary action by performing cell search and synchronization signal detection before PDCCH monitoring. Reduced capability WTRUs first acquire time and frequency synchronization and detect physical layer cell ID using synchronization signals, then proceed to monitor PDCCH candidates in the first search space. This sequential preliminary action ensures measurement precision is established before the optimized monitoring begins.
Solution Approach 2:
The patent uses synchronization signals as an intermediary between the base station and reduced capability WTRUs. These signals enable the WTRUs to first achieve synchronization and cell ID detection, then use this foundation to effectively monitor the reduced set of PDCCH candidates. The synchronization signals act as a mediator that prepares the WTRU receiver for accurate subsequent PDCCH monitoring despite bandwidth constraints.
3Device complexity
If bandwidth is reduced for reduced capability WTRUs, then device complexity is reduced, but reliability of communication deteriorates
Solution Approach 1:
The patent applies partial action by having reduced capability WTRUs monitor only a partial set of PDCCH candidates rather than the complete set. This partial monitoring approach reduces the complexity of the WTRU receiver while maintaining communication reliability through the inclusion of essential candidates in the first search space that are sufficient for reduced capability devices to operate reliably.
Solution Approach 2:
The patent utilizes parameter changes by configuring different search space parameters (first search space with first candidates, second search space with second candidates) based on WTRU capability. This parameter adaptation allows the system to optimize between device complexity and communication reliability by selecting appropriate monitoring parameters matched to each WTRU's capabilities.
Data Source
AI summary
Methods, apparatus, systems, architectures and interfaces for receiving system information performed by a wireless transmit receive unit (WTRU) having reduced capacity, are provided. A method may include any of: receiving a physical broadcast channel (PBCH) transmission of a cell, the PBCH transmission including information, wherein the information indicates a first control resource set (CORESET) associated with reception of a system information block (SIB); receiving, via the first CORESET, a first physical downlink control channel (PDCCH) transmission including information indicating a first type SIB associated with the first PDCCH transmission, wherein the information indicating the first type SIB includes information indicating a second CORESET that (1) is associated with reception of a second type SIB, and (2) has fewer resource blocks than the first CORESET; and receiving, via the second CORESET, a second PDCCH transmission including information indicating the second type SIB associated with the second PDCCH transmission.