Configured Grant Uplink HARQ Mapping for Accurate Retransmission
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Solution Overview
Problem
In 5G communication systems, the configured grant (CG) mechanism for uplink transmission of service data with a large data amount and dynamic changes is inefficient due to identical HARQ process IDs for multiple PUSCHs, leading to inaccurate retransmission and increased processing difficulty for network devices.
Innovation Solution
A method for determining a HARQ process ID based on the number of CG transmission occasions used or skipped in a time period and the index of a subsequent CG transmission occasion, allowing for differentiated HARQ processes across multiple transmission occasions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PUSCH transmission occasions are configured in a CG periodicity time period, then uplink transmission capacity for services with large data amounts is improved, but HARQ process ID collision occurs making retransmission scheduling difficult
Solution Approach 1:
The patent segments the HARQ process identification by introducing separate fields: a first indication information field to indicate the number of used or skipped CG transmission occasions, and a second indication information field to indicate the index of the current CG transmission occasion. This segmentation allows unique HARQ process identification for multiple PUSCH transmissions within one CG periodicity while maintaining the ability to accurately schedule retransmissions.
2Reliability
If only one PUSCH transmission occasion is configured in one CG periodicity time period, then HARQ process ID uniqueness is maintained, but uplink transmission capacity for services with large data amounts is limited
Solution Approach 1:
The patent adds new dimensional information to the HARQ process identification system by introducing two new indication information fields that provide additional degrees of freedom. This allows the system to differentiate between multiple PUSCH transmission occasions within the same CG periodicity, effectively adding a temporal dimension to HARQ process identification and enabling both uniqueness and increased capacity.
3Productivity
If multiple PUSCH transmission occasions are configured, then data transmission efficiency for dynamic services is improved, but processing complexity for network devices increases
Solution Approach 1:
The patent introduces intermediary indication information fields that act as mediators between the multiple PUSCH transmission occasions and the HARQ process identification mechanism. These indication information fields provide structured, standardized information about transmission occasion usage and indexing, simplifying the processing logic for network devices while enabling efficient multi-occasion transmission.
Data Source
AI summary
A data transmission method includes determining a first hybrid automatic repeat request (HARQ) process, sending first indication information on a first configured grant (CG) transmission occasion in a first time period, and sending uplink data on the second CG transmission occasion based on the first HARQ process. An identifier of the first HARQ process is associated with a number of CG transmission occasions used or skipped in the first time period and an index of a second CG transmission occasion in a second time period. The first indication information is useable to indicate the number of CG transmission occasions used or skipped in the first time period.