Radio Access Network Data Retransmission Scheduling
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Solution Overview
Problem
In mobile communications systems, the overhead of downlink control information for retransmission scheduling is high, especially in scenarios with small data packets and large user density, which affects network capacity.
Innovation Solution
A data retransmission method where a radio access network device configures a first parameter and location indication information for a terminal device to determine data transmission resources and indicate retransmission scheduling information, allowing the terminal device to determine retransmission resources based on the received information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station schedules retransmission for each terminal device through delivering a PDCCH, then the terminal device can perform correct data transmission/retransmission, but the overheads of downlink control information become large, affecting network capacity
Solution Approach 1:
The patent merges the retransmission scheduling information of multiple terminal devices into a single PDCCH transmission. The base station multiplexes retransmission scheduling information for different terminal devices in one downlink control information message, allowing multiple devices to be scheduled simultaneously without requiring separate PDCCH transmissions for each device, thereby reducing control overhead and improving network capacity
Solution Approach 2:
The single PDCCH transmission serves multiple functions by simultaneously carrying retransmission scheduling information for multiple terminal devices. This universal approach allows one control signal to perform what would traditionally require multiple separate signals, efficiently managing resources in high-density scenarios
Data Source
AI summary
A radio access network device configures a first parameter and location indication information for a first terminal device. The first parameter is used to determine a data transmission resource of the first terminal device. The location indication information indicates a location of first retransmission scheduling information corresponding to the first terminal device in retransmission scheduling information. Then, the first terminal device sends uplink data to the radio access network device, and the radio access network device receives the uplink data. Afterwards, the radio access network device sends the retransmission scheduling information to the first terminal device. The first terminal device determines a retransmission resource based on the retransmission scheduling information, the location indication information, and the first parameter. Finally, the first terminal device retransmits the uplink data to the radio access network device by using the retransmission resource.