HARQ Feedback Mechanism for Reducing Overhead and Improving Throughput
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Solution Overview
Problem
In existing communication systems, when transmission blocks across multiple carriers are bound for HARQ feedback, if only one block is incorrect, it is difficult to determine which block is faulty, leading to resource waste and reduced throughput due to the inability to distinguish between correct and incorrect blocks.
Innovation Solution
A method where HARQ information is sent using first and second state values of specific lengths, with the first state value representing one-to-one receiving conditions when k falls within a preset range and the second state value representing multiple conditions when k does not, allowing for more precise feedback and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If HARQ information of multiple transmission blocks is bound for feedback, then feedback overhead is reduced, but the ability to identify specific incorrect blocks is lost
Solution Approach 1:
The patent segments the feedback mechanism into two distinct parts: a first HARQ state value that provides coarse-grained feedback for multiple transmission blocks (reducing overall overhead), and a second HARQ state value that provides fine-grained identification of specific incorrect blocks. This segmentation allows the system to achieve both reduced feedback bit length and maintained identification precision by using the first state value for general status and the second state value for specific error localization only when needed.
2Quantity of substance
If binding HARQ information of transmission blocks on multiple carriers, then control signaling overhead is reduced, but system throughput is magnified negatively
Solution Approach 1:
The patent applies segmentation by dividing HARQ feedback into two components: a first HARQ state value that binds feedback for multiple transmission blocks across carriers (reducing control signaling overhead), and a second HARQ state value that provides detailed identification of incorrect blocks (enabling precise retransmission). This allows the system to reduce overhead while maintaining throughput by only requesting retransmission of specifically identified incorrect blocks rather than all bound blocks.
Solution Approach 2:
The patent implements local quality by applying different feedback granularities to different scenarios: using the first HARQ state value for general feedback when overhead reduction is prioritized, and the second HARQ state value for specific block identification when throughput optimization is needed. This local differentiation allows the system to adapt feedback precision to specific operational requirements, optimizing both overhead and throughput performance.
Data Source
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AI summary
Disclosed are an HARQ sending and receiving method and device, and a node. The method comprises: detecting reception conditions of N transmission blocks; according to the reception conditions, generating a first HARQ status value with the length of M bits, wherein each value of all the first HARQ status values corresponds to one reception condition of the N transmission blocks when k falls within a pre-set value range on a one-to-one basis, where k is the number of correctly received transmission blocks among the received transmission blocks, M, N and k are integers, 2 ≤ M < N, and 0 ≤ k ≤ N; and sending the first HARQ status value as HARQ information.