HARQ Retransmission Flexibility Through Dynamic Process Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The current HARQ mechanism lacks flexibility and is unable to adapt to diverse services, leading to inefficiencies in channel utilization and HARQ buffer utilization.
Innovation Solution
Enhancing the HARQ mechanism by determining HARQ-related information such as synchronous or asynchronous HARQ usage, HARQ process numbers, multi-step stop-and-wait HARQ, window-based stop-and-wait HARQ, carrier group correspondence, and RV version modes to improve flexibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the current HARQ mechanism is used, then the system maintains basic retransmission functionality, but the mechanism lacks flexibility and cannot adapt to diverse services
Solution Approach 1:
The patent implements dynamic HARQ configuration where the network device can flexibly select between synchronous and asynchronous HARQ modes, adjust the number of HARQ processes, and configure multi-step stop-and-wait parameters based on real-time service requirements. This dynamic adaptability resolves the contradiction by allowing the system to optimize HARQ behavior for different services without requiring multiple fixed mechanisms.
Solution Approach 2:
The patent changes key HARQ parameters including the number of HARQ processes (first parameter), HARQ mode selection (second parameter), and multi-step stop-and-wait configuration (third parameter). By making these parameters configurable and adjustable, the system achieves versatility across diverse services while maintaining a unified HARQ framework, thus resolving the flexibility-complexity contradiction.
2Productivity
If more HARQ processes are used to improve channel utilization, then the system throughput increases, but the HARQ buffer utilization becomes inefficient
Solution Approach 1:
The patent dynamically adjusts the number of HARQ processes based on service requirements and channel conditions rather than using a fixed large number of processes. This dynamic adjustment ensures that channel utilization is optimized without unnecessarily allocating excessive buffer resources, resolving the contradiction between throughput improvement and buffer efficiency.
Solution Approach 2:
By making the number of HARQ processes a configurable parameter (first parameter), the system can optimize the balance between channel utilization and buffer consumption. The network device determines the appropriate number of processes based on actual service needs, preventing both underutilization of channel and waste of buffer resources.
3Ease of operation
If synchronous HARQ is used for retransmission, then the timing is simplified and predictable, but the system lacks adaptability for diverse service requirements
Solution Approach 1:
The patent creates a universal HARQ configuration framework that can accommodate both synchronous and asynchronous modes through a single configurable mechanism. The network device selects between synchronous mode (for timing simplicity) and asynchronous mode (for service adaptability) based on requirements, making the system multi-functional and resolving the contradiction between operational simplicity and adaptability.
Solution Approach 2:
The system dynamically switches between synchronous and asynchronous HARQ modes depending on service requirements. For services requiring strict timing, synchronous mode is used; for services needing flexibility, asynchronous mode is employed. This dynamic mode selection resolves the contradiction by allowing the system to optimize for either simplicity or adaptability as needed.
4Ease of manufacture
If traditional HARQ mechanisms are used, then the implementation is straightforward, but signaling overhead increases and efficiency decreases
Solution Approach 1:
The patent introduces configurable parameters including multi-step stop-and-wait configuration (third parameter) that allows the system to optimize the balance between implementation complexity and signaling overhead. By adjusting these parameters, the system achieves efficient HARQ operation with reduced signaling requirements while maintaining implementability.
Data Source
Figure 1~2-2
Figure 2-3~3-2
Figure 4~3-3
AI summary
Embodiments of the present application provide a HARO implementation method and apparatus, a terminal device, and a network device. The method comprises: a terminal device determining HARQ-related information, comprising at least one of the following: first information used for indicating to use synchronous HARQ or asynchronous HARQ for retransmission; second information used for indicating whether synchronous HARQ or asynchronous HARQ can be used for retransmission; third information used for indicating the number of HARQ processes used for new transmission and/or retransmission; fourth information used for indicating to use multi-step stop-and-wait HARQ to perform new transmission and/or retransmission; fifth information used for indicating the number of stop-and-wait steps used by the multi-step stop-and-wait HARQ; sixth information used for indicating to use a HARQ method based on window stop-and-wait to perform new transmission and/or retransmission; seventh information used for indicating a window size and/or SN length of the HARQ method based on window stop-and-wait; eighth information used for indicating a corresponding relationship between a HARQ entity and a carrier group; and ninth information used for indicating a redundancy version (RV) version mode used for new transmission and/or retransmission.