HARQ Feedback Delay Configuration for HD-FDD MTC Terminals
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Solution Overview
Problem
Conventional fixed HARQ feedback delays in MTC terminals do not meet the requirements when supporting a certain number of HARQ processes and HARQ bundling, particularly in HD-FDD MTC terminals, leading to inefficiencies in communication systems.
Innovation Solution
Configuring flexible HARQ feedback delay values by defining distinct HARQ feedback delay value sets for different types of terminals, allowing for dynamic adjustment based on their capabilities and scheduling characteristics, using RRC or MAC signaling to indicate these values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional fixed HARQ feedback delay is used, then system simplicity is maintained, but the ability to support multiple HARQ processes and bundling functions is limited
Solution Approach 1:
The patent implements dynamic HARQ feedback delay configuration by introducing multiple delay value sets (first HARQ feedback delay value set and second HARQ feedback delay value set) that can be selectively applied based on terminal type and scheduling characteristics. This allows the system to adapt the HARQ feedback delay dynamically rather than using a fixed value, thereby supporting multiple HARQ processes and bundling functions while maintaining manageable complexity through structured configuration approaches.
Solution Approach 2:
The patent changes the HARQ feedback delay parameter by providing different delay value sets for different terminal types. The network device determines the appropriate delay value from the first or second set based on terminal capabilities and scheduling requirements, enabling the system to support diverse HARQ processes and bundling configurations by adjusting this key parameter rather than redesigning the entire HARQ mechanism.
2Reliability
If flexible HARQ feedback delay configuration is implemented, then HARQ bundling performance is improved, but configuration complexity increases
Solution Approach 1:
The patent segments the HARQ feedback delay configuration into distinct value sets (first set and second set) tailored to different terminal types and scheduling scenarios. This segmentation allows the system to optimize HARQ bundling performance for specific terminal categories while keeping the configuration complexity manageable by providing pre-defined, structured delay options rather than requiring arbitrary configuration values.
Solution Approach 2:
The patent applies local quality by providing customized HARQ feedback delay values for specific terminal types and scheduling characteristics. Instead of a uniform configuration approach, the system determines appropriate delay values from different sets based on local terminal capabilities and network scheduling requirements, thereby improving HARQ bundling performance for each terminal type while maintaining overall system coherence.
3Productivity
If terminal-specific HARQ delay value sets are used, then communication system performance is improved, but information management complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring multiple HARQ feedback delay value sets (first set and second set) that are prepared in advance for different terminal types and scheduling scenarios. This allows the network device to quickly determine and apply the appropriate delay values based on terminal capabilities and scheduling characteristics without requiring complex real-time calculations, thereby improving communication system performance while managing information requirements efficiently.
Data Source
AI summary
A method for configuring a hybrid automatic repeat request (HARQ) delay is applied to a network device, and includes: determining a first HARQ feedback delay value for a terminal of a first type, wherein the first HARQ feedback delay value belongs to a first HARQ feedback delay value set, and the first HARQ feedback delay value set is associated with the terminal of the first type and is different from a second HARQ feedback delay value set associated with a terminal of a second type.