Terminal Feedback Segmentation for Multi-PDSCH Scheduling
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Solution Overview
Problem
In the New Radio (NR) system, when using high-frequency bands, the shortening of slot length poses challenges in generating proper feedback information for multiple PDSCHs scheduled by a single DCI, as existing techniques do not define how to generate HARQ-ACK information effectively.
Innovation Solution
A terminal is configured to generate and transmit feedback information, including specific types of HARQ-ACK information for both single and multiple PDSCHs scheduled by different methods, allowing proper feedback even when multiple PDSCHs are scheduled by one piece of control information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PDSCHs are scheduled by one DCI in high-frequency band, then scheduling efficiency is improved, but feedback information generation becomes undefined and unreliable
Solution Approach 1:
The feedback information is segmented into multiple types: first feedback information for control information scheduling by first method, and second feedback information for control information scheduling by second method. Each feedback type is further divided into third feedback information (single PDSCH) and fourth feedback information (multiple PDSCHs). This segmentation allows the system to handle different scheduling scenarios with appropriate feedback mechanisms, resolving the contradiction between scheduling efficiency and feedback reliability.
2Speed
If slot length is shortened for high-frequency band, then data transmission rate is improved, but feedback information generation for multiple PDSCHs becomes problematic
Solution Approach 1:
The feedback mechanism is made dynamic by adapting the feedback information structure to the scheduling method used. When multiple PDSCHs are scheduled by one DCI, the system dynamically generates appropriate feedback information (fourth feedback information) that corresponds to the specific scheduling scenario. This dynamic adaptation ensures that feedback information is not lost but rather appropriately structured for high-speed transmission scenarios.
Data Source
AI summary
A terminal includes: a control unit configured to generate feedback information including first feedback information for control information that performs scheduling for a downlink shared channel by a first method and second feedback information for control information that performs scheduling for a downlink shared channel by a second method; and a transmission unit configured to transmit the feedback information in uplink, wherein at least the first feedback information includes third feedback information for control information that performs scheduling for a single downlink shared channel and fourth feedback information for control information that performs scheduling for a plurality of downlink shared channels.