HARQ Feedback Routing via Inter-Device Beam Indication
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Solution Overview
Problem
In mobile communication technology, when a terminal switches to communicate with an access network device through beams used for a neighboring cell, HARQ feedback for downlink data is not appropriately returned, leading to issues in data transmission reliability.
Innovation Solution
The proposed method involves a terminal receiving beam indication signaling to determine the target beam for HARQ feedback, and if the target beam belongs to a different access network device, the terminal performs HARQ feedback through that device, ensuring reliable data transmission by either defaulting successful receipt or requesting retransmission as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal communicates through beams used for a neighboring cell, then the terminal can expand communication coverage and access options, but HARQ feedback for downlink data is not appropriately returned, leading to data transmission reliability issues
Solution Approach 1:
The patent introduces an intermediary mechanism where the network device determines whether the target beam belongs to the same access network device or a different one. When it belongs to a different access network device, the network device sends indication information to guide the terminal on how to perform HARQ feedback (either through the target beam or through a different beam). This intermediary determination and indication mechanism resolves the contradiction by enabling flexible HARQ feedback routing that maintains reliability while supporting neighboring cell beam communication.
2Reliability
If the terminal performs HARQ feedback through the target beam when it belongs to a different access network device, then data transmission reliability is improved, but the complexity of beam management and HARQ feedback routing increases
Solution Approach 1:
The patent implements a feedback mechanism where the network device provides indication information to the terminal regarding how to perform HARQ feedback when using target beams from different access network devices. The terminal sends feedback information to the network device, and the network device responds with indication information that guides the feedback behavior. This feedback loop reduces complexity by providing clear, network-directed instructions rather than requiring the terminal to autonomously manage complex beam-HARQ mapping relationships.
Data Source
AI summary
An HARQ feedback method, a device and a storage medium are provided. The method includes: receiving, by a terminal, a beam indication signaling sent by a first access network device, wherein the beam indication signaling indicates a target beam to be used by the terminal; and in response to an access network device to which the target beam belongs being a second access network device, performing, by the terminal, HARQ feedback for downlink data through the target beam together with the second access network device.