HARQ Signal Discrimination via Buffer Status and RV
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Solution Overview
Problem
In LTE mobile communication systems, the existing HARQ mechanism relies solely on the NDI to discriminate between uplink transmission resource assignment messages for initial and retransmissions, leading to potential misidentification and inefficient resource management.
Innovation Solution
The proposed method enhances discrimination by considering the NDI, RV, and HARQ buffer status to accurately differentiate between initial and retransmission messages, ensuring precise resource allocation and reducing misidentification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the HARQ mechanism relies solely on the NDI to discriminate between initial and retransmission messages, then the mechanism is simple to operate, but misidentification occurs leading to reduced transmission reliability
Solution Approach 1:
The patent combines multiple parameters (NDI, RV, and HARQ buffer status) into a unified discrimination mechanism. Instead of relying solely on NDI, the system merges these three elements to jointly determine whether a message is for initial transmission or retransmission, thereby improving reliability while managing complexity through systematic integration
Solution Approach 2:
The patent changes the discrimination approach from using a single parameter (NDI) to using multiple parameters (NDI, RV, and HARQ buffer status). This parameter expansion allows the system to distinguish between initial and retransmission messages more accurately, resolving the misidentification issue while maintaining operational feasibility
2Productivity
If the system uses only NDI for message discrimination, then the operation is simple, but resource management becomes inefficient due to misidentification
Solution Approach 1:
The system merges NDI, RV, and HARQ buffer status checks into a comprehensive discrimination process. This combination enables more accurate resource allocation by preventing misidentification of message types, thereby improving resource management efficiency while the structured approach maintains operational clarity
Solution Approach 2:
The patent incorporates HARQ buffer status feedback into the discrimination mechanism. By checking whether the HARQ buffer is empty or not, the system gains additional feedback information that helps accurately determine message type, improving resource management while the feedback-based approach provides a systematic operation framework
3Measurement precision
If the system enhances discrimination by considering NDI, RV, and HARQ buffer status, then message discrimination accuracy improves, but the processing complexity increases
Solution Approach 1:
The patent transitions from single-parameter (NDI) to multi-parameter (NDI, RV, HARQ buffer status) discrimination. This parameter expansion significantly improves message discrimination accuracy by providing multiple indicators for determination, while the systematic use of these parameters creates a manageable processing framework
Solution Approach 2:
The discrimination process is segmented into distinct checks: first examining NDI, then RV, and finally HARQ buffer status. This segmentation of the discrimination process into sequential steps makes the enhanced complexity manageable by breaking down the multi-parameter analysis into organized, sequential operations
Data Source
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AI summary
A signal transmission method and apparatus of a user equipment for a mobile communication system is provided for improving data transmission reliability and efficiency by transmitting data based on precise discrimination of the uplink transmission resource assignment messages indicative of initial transmission and retransmission. A signal transmission method of a user equipment for a mobile communication system receives an uplink transmission resource assignment message from a base station determines whether a Hybrid Automatic Repeat reQuest (HARQ) buffer is empty, and when the HARQ buffer is empty, transmits to the base station a Media Access Control Protocol Data Unit (MAC PDU) generated with reference to information contained in the uplink transmission resource assignment message.