Narrowband Downlink Reception with CORESET #0 Puncturing
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in supporting narrowband use cases due to channel bandwidth limitations, particularly in 5G NR, which require efficient methods for receiving downlink data in narrowband channels.
Innovation Solution
The proposed solution involves configuring the CORESET #0 bandwidth and initial downlink bandwidth part (DL BWP) to accommodate narrowband channels by puncturing or power boosting PDCCH transmissions, and defining the initial DL BWP based on the CORESET #0 configuration, allowing for efficient reception of system information blocks in narrowband wireless communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the channel bandwidth is reduced to support narrowband use cases, then the coverage and efficiency of downlink data reception are improved, but the available resource blocks for control resource set (CORESET) and bandwidth part (BWP) configuration are reduced
Solution Approach 1:
The resource blocks are segmented into two distinct groups: first resource blocks allocated for control resource set (CORESET) operations and second resource blocks allocated for bandwidth part (BWP) operations. This segmentation allows efficient utilization of limited narrowband resources by assigning specific resource blocks to specific functions, ensuring that control operations and data operations do not conflict while maximizing the use of available resource blocks in the reduced bandwidth channel.
2Length of moving object
If the total number of resource blocks is reduced in narrowband channels, then the channel bandwidth requirement is reduced, but the configuration flexibility for CORESET and BWP is limited
Solution Approach 1:
Different quality and allocation strategies are applied to different portions of the available resource blocks. The first resource blocks are dedicated to CORESET with specific allocation rules, while the second resource blocks are dedicated to BWP with different allocation rules. This local differentiation allows the system to maintain configuration flexibility for both control and data operations even within the constrained narrowband environment, as each segment can be optimized independently for its specific purpose.
Data Source
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AI summary
There is provided a method of operating a user equipment (UE) in a wireless communication system. The method includes receiving, from a base station (BS), a master information block (MIB) including configuration information related to a total number of contiguous resource blocks for control resource set (CORESET) #0; receiving, from the base station, a physical downlink control channel (PDCCH) related to system information block 1 (SIB1) through the CORESET #0 including second resource blocks excluding first resource blocks from the resource blocks based on i) the total number of the resource blocks and ii) a channel bandwidth, a puncturing for a specific number of first resource blocks among the resource blocks being assumed; and receiving, from the base station, a physical downlink shared channel (PDSCH) related to the SIB1 via an initial downlink (DL) bandwidth part (BWP) based on the PDCCH. Based on the puncturing for the first resource blocks, the initial DL BWP is defined by a number of the second resource blocks forming the CORESET #0 and a location of the second resource blocks.