Out-of-HARQ Scheduling Interruption Detection in Wireless Networks
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Solution Overview
Problem
In wireless communication systems, out-of-HARQ order scheduling scenarios hinder a network device's ability to make accurate scheduling policies due to uncertainty about the reception status of data packets, leading to potential data loss and increased transmission delays.
Innovation Solution
A method where the network device actively determines whether the transmission of a second PDSCH interrupts the processing of a first PDSCH by analyzing capability information of the terminal device, such as downlink data processing delay and the number of PDSCHs that can be processed simultaneously, and adjusts retransmission strategies to ensure self-decodable data is resent if necessary, thereby improving transmission reliability and reducing resource waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the network device uses out-of-HARQ order scheduling to prioritize emergency services, then the transmission delay of emergency data is reduced, but the network device cannot accurately determine reception status of non-emergency data leading to incorrect scheduling policies
Solution Approach 1:
The patent introduces a feedback mechanism where the terminal device sends HARQ feedback information to the network device indicating whether processing of the first PDSCH was interrupted. This feedback enables the network device to accurately determine the reception status of non-emergency data and make correct scheduling decisions, resolving the contradiction between prioritizing emergency services and maintaining scheduling accuracy.
Solution Approach 2:
The patent implements preliminary determination of potential processing interruptions by the network device before actual retransmission decisions are made. The network device proactively identifies scenarios where emergency PDSCH transmission may interrupt ongoing processing of non-emergency PDSCH, and prepares appropriate scheduling policies in advance based on terminal capability information.
2Reliability
If the network device blindly retransmits data without knowing reception status, then transmission reliability is improved, but unnecessary retransmissions increase resource consumption
Solution Approach 1:
The patent employs HARQ feedback information from the terminal device to accurately determine whether retransmission is necessary. The terminal device provides explicit feedback about processing interruptions, enabling the network device to distinguish between cases requiring retransmission and those where data was successfully received, thereby avoiding unnecessary retransmissions and reducing resource consumption.
Solution Approach 2:
The terminal device actively participates in the scheduling decision-making process by self-evaluating its processing status and providing feedback to the network device. This self-service approach allows the terminal to inform the network about interruptions it experienced, enabling more efficient and targeted retransmission decisions.
Data Source
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AI summary
This application provides a wireless communication method, a network device, a terminal device, and a computer-readable storage medium. The method includes: sending, by a network device, a first PDSCH and a second PDSCH to a terminal device, where scheduling performed by the network device on the first PDSCH and the second PDSCH is out-of-HARQ order scheduling; determining, by the network device, whether transmission of the second PDSCH interrupts a processing process performed by the terminal device on the first PDSCH; and if the network device determines that the transmission of the second PDSCH interrupts the processing process performed by the terminal device on the first PDSCH, determining, by the network device, that data corresponding to the first PDSCH is not successfully received. According to the technical solutions provided in this application, in an out-of-HARQ order scheduling scenario, a network device actively determines whether transmission of a second PDSCH interrupts a processing process performed on a first PDSCH that is transmitted first. This is favorable for the network device to make a correct scheduling policy.