Hybrid HARQ Process Identification for Long-Round-Trip Networks
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Solution Overview
Problem
The number of HARQ processes supported by existing communication systems, particularly in non-terrestrial networks and systems with larger round-trip times or more parallel data transmissions, becomes a bottleneck for improving system performance.
Innovation Solution
Implementing enhanced HARQ process identification and disabling mechanisms based on scheduling information and indicators, such as system frame indexes, sub-frame indexes, and slot indexes, to manage a larger number of HARQ processes effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of HARQ processes is increased to support larger round-trip times and more parallel data transmissions, then system performance and reliability are improved, but device complexity and data storage requirements increase
Solution Approach 1:
The patent segments the HARQ process identification into multiple components: a first identifier from scheduling information and a second identifier from feedback timing information. This segmentation allows the system to manage a larger number of HARQ processes by combining multiple identification dimensions rather than relying on a single large identifier space, thus reducing the complexity burden on individual components while maintaining high reliability
Solution Approach 2:
The patent transitions from using a single-dimensional HARQ process identifier to a multi-dimensional identification system that incorporates both scheduling information and feedback timing information. This dimensional expansion enables the system to distinguish between a larger number of concurrent HARQ processes without proportionally increasing the complexity of individual identifier management, as the identifiers are derived from existing timing and scheduling parameters
2Productivity
If the number of HARQ processes is increased to support larger round-trip times and more parallel data transmissions, then system performance is improved, but data storage requirements increase
Solution Approach 1:
The patent makes existing timing and scheduling parameters serve multiple functions: they simultaneously provide feedback timing information, HARQ process identification, and scheduling details. By deriving the second identifier from feedback timing information that is already being collected and processed by the UE, the system eliminates the need for separate dedicated storage for HARQ identifiers, thus improving productivity without proportionally increasing data storage requirements
Solution Approach 2:
The patent changes the nature of the identifier from a standalone data structure to a derived parameter that is calculated from existing timing and scheduling parameters. This parameter transformation allows the system to maintain support for a larger number of HARQ processes by utilizing mathematical operations on existing data rather than storing additional data structures, thereby improving system performance while controlling storage growth
Data Source
AI summary
The present disclosure relates to methods, systems and devices for use in a user equipment includes receiving, from a base station, BS, the scheduling information for scheduled data, and determining at least one feedback process identifier of at least one feedback process associated with the scheduling information for scheduled data based on feedback process identifier information in the scheduling information and at least one indicator.