Inter-UE Coordination Messaging: HARQ Recovery for MAC-CE and SCI
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Solution Overview
Problem
Existing wireless communication systems face errors due to the inability to decode portions of requests and inter-UE coordination information transmitted via MAC-CE and SCI, leading to unreliable UE-to-UE communication.
Innovation Solution
Implementations provide methods for handling scenarios where MAC-CE and SCI-based inter-UE coordination information cannot be decoded, including priority-based handling and HARQ feedback mechanisms to mitigate errors in UE-to-UE communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If inter-UE coordination information is transmitted via MAC-CE and SCI, then UE-to-UE communication efficiency is improved, but decoding reliability deteriorates when portions of the information cannot be decoded
Solution Approach 1:
The patent implements HARQ feedback mechanisms where the receiving UE sends acknowledgment signals to indicate successful or failed decoding of MAC-CE and SCI messages. This feedback loop enables the transmitting UE to identify when decoding failures occur and trigger retransmission, directly addressing the reliability issue while preserving the efficient direct transmission mode.
Solution Approach 2:
The patent prepares for potential decoding failures by implementing priority-based handling and retransmission mechanisms in advance. When decoding failures are detected, the system can immediately initiate retransmission of critical coordination information, cushioning against the impact of initial decoding failures and ensuring continuous reliable operation.
2Reliability
If priority-based handling is implemented for inter-UE coordination requests, then error mitigation is improved, but message processing complexity increases
Solution Approach 1:
The patent applies different processing priorities to different types of coordination requests based on their local importance. Critical requests with higher priority indicators are processed and given preference in resource allocation and retransmission scheduling, while lower priority requests are handled accordingly. This localized prioritization improves error mitigation for critical messages without requiring complete system redesign.
Data Source
AI summary
Implementations for messaging for inter-user equipment (UE) coordination are described, such as related to providing ways for handling scenarios for inter-UE coordination where portions of requests for inter-UE coordination information and/or replies to requests for inter-UE coordination information are not successfully received.