CORESET #0 Bandwidth Determination for RedCap PDSCH Reception
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Solution Overview
Problem
Existing wireless communication systems face challenges in transmitting and receiving system information efficiently in limited maximum user equipment (UE) bandwidth situations, particularly for reduced capability (RedCap) UEs, leading to reception delays and reliability issues.
Innovation Solution
A method and apparatus for receiving a physical downlink shared channel (PDSCH) that involves determining a bandwidth for CORESET #0 based on the frequency position of synchronization signal (SS)/physical broadcast channel (PBCH) blocks, allowing reduced capability UEs to receive system information without delay by adjusting bandwidth in units of resource blocks or around the center frequency, and transmitting PDSCH based on this bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the bandwidth for CORESET #0 is determined based on frequency position of SS/PBCH block, then reduced capability UEs can receive system information without delay, but the device complexity increases due to additional bandwidth determination logic
Solution Approach 1:
The bandwidth for CORESET #0 is determined in advance based on the frequency position of the SS/PBCH block before the actual system information reception. This preliminary determination allows RedCap UEs to know the exact bandwidth to monitor, enabling them to receive system information without delay while the complexity is managed through standardized rules rather than complex adaptive logic.
Solution Approach 2:
The bandwidth parameter for CORESET #0 is dynamically adjusted based on the frequency position of the SS/PBCH block. By changing the bandwidth parameter according to the frequency location, the system enables RedCap UEs to efficiently receive system information while adapting to different deployment scenarios without requiring complex device logic.
2Productivity
If the bandwidth is adjusted in units of resource blocks around center frequency, then communication efficiency is enhanced for limited bandwidth scenarios, but the manufacturing precision requirements increase for frequency positioning
Solution Approach 1:
The bandwidth is segmented into discrete resource block units around the center frequency of the SS/PBCH block. This segmentation allows for precise yet manageable bandwidth allocation that enhances communication efficiency for RedCap UEs while using standardized resource block definitions to avoid excessive manufacturing precision requirements.
Solution Approach 2:
The bandwidth adjustment is applied locally around the center frequency of the SS/PBCH block rather than across the entire spectrum. This localized approach enhances communication efficiency for the specific frequency region where system information is transmitted while reducing the overall precision requirements compared to global frequency positioning.
3Reliability
If PDSCH is transmitted based on determined bandwidth, then reliable system information transmission is achieved, but the loss of time increases due to bandwidth determination process
Solution Approach 1:
The bandwidth for CORESET #0 is determined in advance during the initial access phase based on the frequency position of the SS/PBCH block. This preliminary action ensures that the bandwidth is already established when system information transmission occurs, maintaining reliability while minimizing the time loss during actual information transfer.
Data Source
AI summary
Proposed are a method for transmitting or receiving a physical downlink shared channel in a wireless communication system, and a device therefor. The method performed by a terminal may comprise the steps of: receiving an SS/PBCH block from a base station; on the basis of at least one of the frequency location of the SS/PBCH block and/or the frequency location of CORESET #0, determining a bandwidth for CORESET #0, receiving a PDCCH from the base station on CORESET #0 on the bandwidth; and receiving a PDSCH including system information on the basis of the PDCCH.