PDCCH Repetition Scheduling With Single ACK/NACK Feedback
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Solution Overview
Problem
Existing communication technologies lack detailed specifications for PDCCH repetitions to enhance reliability and robustness, leading to unnecessary ACK/NACK feedback for multiple PDSCH transmissions and inadequate power control in uplink transmissions due to poor channel quality.
Innovation Solution
Implementing a method where network devices transmit a set of PDCCH repetitions with a unified TPC command for power control and implicit indication of repetition enablement, allowing terminal devices to provide a single ACK or NACK for successful or unsuccessful decoding of data transmissions, and adjust power based on the TPC command without accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PDCCH repetitions are implemented to improve reliability, then communication reliability is improved, but feedback signaling becomes unnecessary and complex
Solution Approach 1:
The patent combines multiple PDCCH repetitions into a single feedback unit. Instead of requiring separate ACK/NACK feedback for each PDCCH repetition, the terminal device provides a single feedback signal that covers all repetitions, thereby reducing feedback signaling complexity while maintaining reliability improvements from repetition.
Solution Approach 2:
The system uses the presence or absence of feedback information to indicate the decoding status of PDCCH repetitions. When feedback is not provided, it implicitly indicates successful decoding, eliminating the need for explicit feedback signaling for each repetition and simplifying the feedback mechanism.
2Reliability
If multiple PDSCH transmissions are scheduled, then data transmission reliability is improved, but ACK/NACK feedback becomes unnecessary for each transmission
Solution Approach 1:
The patent merges multiple ACK/NACK feedback signals into a single feedback transmission. By combining feedback for multiple PDSCH transmissions, the system reduces the total number of feedback signals sent, thereby reducing energy consumption while maintaining the reliability benefits of multiple transmissions.
3Measurement precision
If TPC commands are accumulated from multiple PDCCH repetitions, then power control precision is improved, but system complexity increases
Solution Approach 1:
The patent extracts the TPC command from individual PDCCH repetitions and applies it directly to the corresponding PDSCH transmission. Instead of accumulating TPC commands from multiple repetitions, the system uses the TPC command from the specific repetition that schedules the data transmission, simplifying the power control mechanism while maintaining precision.
4Adaptability or versatility
If PDCCH repetition enablement is explicitly indicated, then system flexibility is improved, but signaling overhead increases
Solution Approach 1:
The system uses the presence or absence of feedback information to implicitly indicate whether PDCCH repetitions are enabled. When feedback is not provided, it implicitly indicates successful decoding and repetition enablement, eliminating the need for explicit indication signaling and reducing overhead while maintaining system flexibility.
Data Source
AI summary
Embodiments of the present disclosure relate to methods, devices and computer storage media for communication. A method comprises transmitting, from a network device to a terminal device, a set of repetitions of downlink control information (DCI) for scheduling data transmissions from the network device to the terminal device; performing, based on the set of repetitions of the DCI, the data transmissions from the network device to the terminal device; and receiving, from the terminal device, a single feedback signal for the data transmissions. Embodiments of the present disclosure can improve reliability and robustness for Physical Downlink Control Channel (PDCCH).