HARQ Entity Segmentation for 5G Multi-Numerology Support
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Solution Overview
Problem
Current solutions for Hybrid Automatic Repeat Request (HARQ) transmission in 5G systems do not effectively support multiple numerologies and/or Transmission Time Intervals (TTIs), which is a departure from the LTE system's single numerology and TTI configuration.
Innovation Solution
A method and device for transmitting HARQ that maintains multiple concurrent HARQ processes per cell, with terminals receiving scheduling signaling from network-side devices to determine HARQ process numbers and baseband parameters or transmission time intervals, allowing for flexible configuration of HARQ processes based on initial and retransmission signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LTE system uses a single numerology and fixed TTI length per HARQ entity, then the system structure is simple and easy to manage, but the system cannot support multiple numerologies and variable TTI lengths required for 5G scenarios
Solution Approach 1:
The patent segments the HARQ entity into multiple independent HARQ process instances, each capable of handling different numerologies and TTI lengths. This allows the system to support multiple 5G scenarios simultaneously while maintaining manageable complexity through modular organization of HARQ processes.
Solution Approach 2:
The patent creates a universal HARQ entity structure that can handle multiple numerologies and TTI configurations through a single unified framework. The HARQ entity is designed to be multi-functional, supporting both legacy LTE and new 5G scenarios within the same entity, thereby improving adaptability without proportionally increasing complexity.
2Adaptability or versatility
If the system supports variable TTI lengths for different scenarios, then the transmission flexibility improves, but the scheduling and resource management complexity increases
Solution Approach 1:
The patent implements dynamic TTI length configuration where each HARQ process can be independently configured with different TTI lengths based on traffic requirements. The scheduling signaling dynamically indicates the TTI length for each HARQ process, allowing flexible adaptation to different 5G scenarios while maintaining clear resource management through process-specific configuration.
3Productivity
If multiple HARQ processes are maintained per cell to support concurrent transmissions, then the system throughput increases, but the management and tracking of HARQ processes becomes more complex
Solution Approach 1:
The patent segments the HARQ management function into process-specific sub-managers, where each HARQ process has its own dedicated management instance. This segmentation allows concurrent HARQ processes to be handled independently, increasing system throughput while keeping individual process management simple and tractable.
Solution Approach 2:
The patent implements feedback mechanisms where each HARQ process reports its status independently, and the network side provides process-specific acknowledgments and retransmission commands. This structured feedback approach simplifies the tracking of multiple concurrent processes by providing clear status information for each process individually.
Data Source
AI summary
Disclosed in the present application are a hybrid automatic repeat request HARQ transmission method and a related device, for solving the technical problem that there not yet exists an HARQ transmission scheme for the 5G system in the prior art due to the fact that the 5G system supports multi-numerology and/or multi-TTI. The method comprises: a terminal maintains an HARQ entity on the basis of a cell, the HARQ entity supporting multiple parallel HARQ processes; the terminal receives a scheduling signaling sent by the network side device; and the terminal determines, according to the scheduling signaling, an HARQ process number of the HARQ entity against which the scheduling signaling is directed and a baseband parameter and/or transmission time interval corresponding to the HARQ process number.