HARQ Process ID Assignment for Multi-Occasion Grant PUSCH
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Solution Overview
Problem
Existing communication systems struggle to determine HARQ process IDs for multiple transmission occasions within a configured grant PUSCH period, particularly in services like XR with variable packet sizes and time-of-arrival jitter.
Innovation Solution
A method for determining HARQ process IDs is provided, allowing terminals and network side devices to associate HARQ process IDs with multiple transmission occasions within a configured grant PUSCH period, using formulas and predefined rules to ensure unique IDs for each occasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple transmission occasions are supported within one period of configured grant PUSCH, then the system can handle variable packet sizes and time-of-arrival jitter in XR services, but the complexity of determining HARQ process IDs increases
Solution Approach 1:
The patent segments the period of configured grant PUSCH into multiple transmission occasions, with the first N occasions using one HARQ process ID determination method and subsequent M occasions using another method. This segmentation allows the system to handle variable packet sizes and jitter while maintaining manageable complexity through structured, rule-based ID assignment for each segment.
Solution Approach 2:
The patent introduces dynamic HARQ process ID determination where the ID for subsequent transmission occasions is derived based on the ID of previous occasions plus an offset. This dynamic approach allows the system to adapt to varying transmission requirements while maintaining a systematic method for ID assignment, balancing flexibility with complexity management.
2Productivity
If multiple transmission occasions are supported within one period of configured grant PUSCH, then different TBs can be transmitted on different occasions, but the difficulty of detecting and measuring HARQ process IDs increases
Solution Approach 1:
The patent implements a self-service mechanism where the terminal autonomously determines HARQ process IDs for multiple transmission occasions using predefined formulas and rules. The terminal calculates IDs based on the occasion index and configured parameters without requiring network side assignment, thereby improving transmission efficiency while maintaining manageable detection complexity through systematic ID generation.
3Reliability
If HARQ process ID is determined based on previous occasion IDs with offset, then unique IDs can be assigned to multiple transmission occasions, but the device complexity increases
Solution Approach 1:
The patent uses a copying approach where the HARQ process ID for subsequent transmission occasions is derived by copying and offsetting the ID from previous occasions. Instead of assigning completely new IDs, the system copies existing IDs and applies systematic offsets, ensuring uniqueness while reducing the complexity of ID management through pattern-based generation.
Data Source
AI summary
Embodiments of this application disclose a method for determining a HARQ process ID, a terminal, and a network side device, pertaining to the field of communication technologies. The method for determining a HARQ process ID in embodiments of this application includes: A terminal determines a first HARQ process ID associated with the first N transmission occasions within one period of a configured grant PUSCH, where a second HARQ process ID associated with each M transmission occasions after the N transmission occasions within the period is determined based on the following content: a HARQ process ID associated with M transmission occasions before the M transmission occasions, and N and M are positive integers; or the terminal determines, based on numbers of transmission occasions, a third HARQ process ID associated with each M transmission occasions within one period of the configured grant PUSCH.