Narrowband NR CORESET Configuration via Puncturing
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Solution Overview
Problem
Current narrowband new radio (NR) systems face challenges in configuring control resource sets (CORESETs) for narrow frequency bands, as the minimum bandwidth of NR CORESETs exceeds the available channel bandwidth, leading to incomplete fitting within the channel, which can cause compatibility issues and require hardware/software updates.
Innovation Solution
The proposed solution involves configuring the CORESET by determining a first portion within the channel bandwidth and a second portion outside it, allowing for the reuse of existing CCE mapping, and puncturing the excess portion of the CORESET to fit within the channel bandwidth, thereby maintaining compatibility without the need for updates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the minimum bandwidth of NR CORESET is used, then the control resource set can provide sufficient resources for PDCCH monitoring, but it cannot fit completely within narrow channel bandwidth, causing compatibility issues
Solution Approach 1:
The CORESET bandwidth is divided into multiple portions, with the first portion fitting within the narrow channel bandwidth and the second portion extending outside. This segmentation allows the system to maintain the required total CORESET bandwidth while ensuring compatibility with narrowband channels by placing critical control information in the first portion that can be received within the channel bandwidth.
Solution Approach 2:
The patent applies partial action by ensuring that the essential PDCCH monitoring function is fulfilled within the first portion of the CORESET that fits within the channel bandwidth, while the second portion extending beyond the channel bandwidth provides additional capacity that can be utilized when available, without requiring complete utilization of the full CORESET bandwidth.
2Adaptability or versatility
If the CORESET is configured to fit within channel bandwidth, then compatibility is maintained, but PDCCH candidate placement flexibility is reduced
Solution Approach 1:
The patent introduces an additional dimension by configuring the CORESET to extend beyond the channel bandwidth boundaries, creating a two-region structure (first portion within bandwidth, second portion outside). This dimensional extension provides more flexible placement options for PDCCH candidates across the extended frequency range while maintaining compatibility through the first portion that remains within the channel bandwidth.
3Reliability
If hardware and software updates are implemented to support narrowband CORESET, then optimal narrowband performance is achieved, but system complexity and cost increase
Solution Approach 1:
The patent creates a universal CORESET configuration that functions effectively in both narrowband and wideband scenarios. The first portion within the channel bandwidth ensures compatibility with narrowband systems using existing hardware, while the second portion provides enhanced capacity for wider bandwidths, making the same CORESET structure universally applicable across different bandwidth configurations without requiring specialized hardware or software updates.
Data Source
AI summary
Wireless communications systems and methods related to control resource set (CORESET) configuration for narrowband new radio (NR) are provided. A user equipment (UE) performs physical downlink control channel (PDCCH) monitoring in a first portion of a CORESET. The first portion is within a channel bandwidth, and the CORESET includes a second portion outside the channel bandwidth. The UE receives a system information block (SIB) based on the PDCCH monitoring.