Segmented CORESET Configuration for RedCap PDCCH Reception
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Solution Overview
Problem
The challenge of ensuring coexistence and efficient operation of reduced capability user equipment (RedCap) with other user equipment types in 5G networks, particularly due to the reduced bandwidth of RedCap devices, which can lead to significant complexity and coverage issues in network scheduling and CORESET configuration.
Innovation Solution
A novel configuration of a second CORESET with segments that do not exceed the bandwidth of RedCap devices, allowing for the use of a wider bandwidth CORESET in combination with a second CORESET to transmit PDCCH within the reduced bandwidth, along with a modified CCE-to-REG mapping to enhance frequency diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a first CORESET configuration with bandwidth exceeding terminal device bandwidth is provided, then network resource utilization is improved, but the terminal device cannot properly receive control information due to bandwidth mismatch
Solution Approach 1:
The first CORESET is segmented into multiple second CORESETs, where each second CORESET has a bandwidth that does not exceed the terminal device bandwidth. This segmentation allows the control information to be distributed across multiple narrower bandwidth segments that the terminal can receive, while collectively utilizing the wider network bandwidth resources.
2Adaptability or versatility
If separate configuration is provided for enhanced RedCap UE with 5 MHz bandwidth, then device compatibility is improved, but gNB operation complexity increases
Solution Approach 1:
The first CORESET configuration is designed to serve multiple purposes: it provides wide bandwidth resource utilization for the network while being segmented into narrower second CORESETs that can be received by both legacy UEs and enhanced RedCap UEs with 5 MHz bandwidth. This universal configuration approach eliminates the need for separate configurations for different device types.
3Reliability
If a second CORESET with multiple segments is introduced, then frequency diversity is enhanced, but configuration complexity increases
Solution Approach 1:
The first CORESET is divided into multiple second CORESETs distributed across different frequency segments. This segmentation inherently provides frequency diversity as control information is transmitted across multiple frequency segments, improving reliability against frequency-selective fading while maintaining a unified configuration approach that does not significantly increase complexity.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for a second resource set for a reduced capability user equipment or enhanced reduced capability user equipment as well as a mapping offset for frequency diversity are provided. For example, a method may include receiving from a network element in a radio access network, a first configuration for a first control resource set (CORESET) having a bandwidth that exceeds a bandwidth of the terminal device. The method may also include determining a second configuration for a second CORESET. The second CORESET may have multiple segments. Each of the segments may not exceed a bandwidth of the terminal device.