PUSCH MIMO Layer Aggregation for Radar Interference Mitigation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
5G cellular networks face challenges in coexistence with high-power narrowband interferers like RADAR, leading to unreliable data transmission and potential interference with RADAR systems.
Innovation Solution
A method implemented by a wireless transmit/receive unit (WTRU) involves transmitting a message to inform the network of PUSCH MIMO layer aggregation capability, receiving a MIMO rank, and using PUSCH MIMO layer aggregation to transmit multiple redundancy versions of a codeword based on the determined layer aggregation level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If PUSCH transmission is used in overlapping bands with RADAR, then data communication efficiency is improved, but transmission reliability deteriorates due to RADAR interference
Solution Approach 1:
The codeword is divided into multiple code blocks that are distributed across multiple MIMO layers. Each layer carries a segment of the data with different redundancy versions, allowing the receiver to reconstruct the original data even if some layers are corrupted by RADAR interference.
Solution Approach 2:
Multiple redundancy versions of the codeword are transmitted in advance across different MIMO layers before the receiver needs to reconstruct the data. This preparatory distribution of redundant information cushions against potential RADAR interference, ensuring that sufficient clean copies exist for reliable decoding.
2Productivity
If PUSCH transmission is used in overlapping bands with RADAR, then spectrum utilization is improved, but interference with RADAR system increases
Solution Approach 1:
Different MIMO layers transmit different redundancy versions of the codeword, creating local variations in data quality and redundancy distribution. This allows the system to adapt to localized interference conditions from RADAR, where certain frequency-time resources may be more affected than others.
3Reliability
If MIMO layer aggregation is used to improve transmission robustness, then transmission reliability is improved, but device complexity increases
Solution Approach 1:
The WTRU预先 informs the network of its PUSCH MIMO layer aggregation capability through a capability message. This preliminary notification allows the network to configure appropriate MIMO parameters and redundancy distribution strategies, reducing the complexity of real-time decision-making during transmission.
Data Source
AI summary
A wireless transmit receive unit (WTRU) and methods are disclosed for mitigating radar interference on PUSCH transmission. The method may include: transmitting a message informing a network of PUSCH MIMO layer aggregation capability; receiving a MIMO rank; receiving an indication to use PUSCH MIMO layer aggregation; determining a PUSCH layer aggregation level based on the MIMO rank; and transmitting multiple redundancy versions of a PUSCH codeword comprising one or more code blocks based on the PUSCH layer aggregation level. The WTRU may be configured to transmit a message informing a network of PUSCH MIMO layer aggregation capability; receive a MIMO rank; receive an indication to use PUSCH MIMO layer aggregation; determine a PUSCH layer aggregation level based on the MIMO rank; and transmit multiple redundancy versions of a PUSCH codeword comprising one or more code blocks based on the PUSCH layer aggregation level.