Reduced-Bandwidth WTRU System Information Reception via Segmented CORESETs
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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, including MIMO technology, beamforming, and scalable numerology to enhance communication efficiency and reduce bandwidth requirements for WTRUs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reduced capability WTRUs use the full bandwidth for cell search and system information acquisition, then synchronization accuracy and cell ID detection reliability are improved, but the WTRU bandwidth capability constraints are violated and device complexity increases
Solution Approach 1:
The patent segments the initial bandwidth into a first bandwidth for reduced capability WTRUs and a second bandwidth for other WTRUs. The gNB transmits synchronization signals and system information in both bandwidths simultaneously, allowing reduced capability WTRUs to operate within their limited bandwidth constraints while still accessing necessary cell search and system information functions.
Solution Approach 2:
The patent implements dynamic bandwidth configuration where the gNB can switch between transmitting in the first bandwidth (for reduced capability WTRUs) and the second bandwidth (for other WTRUs) based on the detected WTRU capability. This dynamic adaptation allows the system to optimize performance for different device types without requiring permanent complex infrastructure.
2Reliability
If reduced capability WTRUs monitor all PDCCH candidates in the full search space, then PDCCH detection reliability is improved, but processing time and energy consumption increase
Solution Approach 1:
The patent defines a first search space for reduced capability WTRUs with a subset of PDCCH candidates and a second search space for other WTRUs with a superset of candidates. Reduced capability WTRUs only monitor PDCCH candidates in the first search space, reducing processing time and energy consumption while maintaining adequate detection reliability for their operational requirements.
Solution Approach 2:
The patent applies partial action by having reduced capability WTRUs monitor only a subset of PDCCH candidates (first search space) rather than all candidates (second search space). This partial monitoring approach is sufficient for reduced capability WTRUs while full capability WTRUs can access the complete candidate set when needed.
3Loss of information
If the gNB transmits all system information blocks in the full bandwidth, then system information acquisition completeness is improved, but transmission time and bandwidth efficiency are reduced
Solution Approach 1:
The patent segments system information transmission by defining a first set of system information blocks for reduced capability WTRUs and a second set for other WTRUs. The gNB transmits both sets in the initial bandwidth, ensuring reduced capability WTRUs receive complete necessary information while improving overall bandwidth efficiency through targeted transmission.
Solution Approach 2:
The patent implements universality by having the gNB transmit synchronization signals and system information in both the first bandwidth (for reduced capability WTRUs) and the second bandwidth (for other WTRUs) simultaneously. This multi-functional transmission approach ensures all WTRU types can access required information while optimizing bandwidth utilization.
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.