Unlicensed Channel Feedback Transmission via Multiple Resource Positions
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Solution Overview
Problem
In wireless communication systems, the Hybrid-Automatic Repeat reQuest (HARQ) mechanism is not effective for unlicensed channels due to the terminal's inability to contend for and occupy the channel, leading to failed feedback data transmission and unreliable data transfer.
Innovation Solution
A data transmission method where a base station transmits a control instruction to a terminal with indication information specifying multiple resource positions for feedback data transmission in an unlicensed channel, allowing the terminal to transmit feedback data through at least one occupied resource position, thereby increasing the success rate of feedback data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a terminal contends for an unlicensed channel to transmit feedback data, then the unlicensed channel resources can be utilized for data transmission, but the terminal may fail to occupy the channel resulting in failed feedback data transmission
Solution Approach 1:
The base station pre-configures multiple resource positions for feedback data transmission before the terminal actually transmits. This allows the terminal to have multiple predetermined opportunities to send feedback data without needing to successfully contend for the channel each time, thereby resolving the contradiction between utilizing unlicensed channel resources and ensuring reliable feedback transmission.
Solution Approach 2:
The patent provides multiple resource positions as a buffer against channel contention failure. If the terminal fails to occupy the unlicensed channel at one resource position, it still has other predetermined resource positions to attempt transmission, cushioning against the harmful effect of channel contention failure and ensuring feedback data can eventually be transmitted.
2Device complexity
If a single resource position is allocated for feedback data transmission, then the control instruction complexity is reduced, but the feedback data transmission success rate decreases
Solution Approach 1:
The feedback transmission opportunity is segmented into multiple discrete resource positions rather than a single continuous allocation. Each resource position represents an independent opportunity for the terminal to transmit feedback data. This segmentation allows the system to maintain relatively simple control instructions while providing multiple chances for successful transmission, thereby resolving the contradiction between control simplicity and transmission success rate.
Data Source
AI summary
A data transmission method includes that: a base station transmits a control instruction to a terminal, the control instruction carrying indication information and the indication information indicating multiple resource positions configured for the terminal to transmit feedback data in an unlicensed channel; and the feedback data transmitted by the terminal is received, the feedback data being transmitted by the terminal through at least one resource position among the multiple resource positions in the case of the unlicensed channel being occupied by the terminal.