DCI-Based Two-Transport-Block Scheduling for NR Uplink Retransmissions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The current new radio (NR) system's downlink control information (DCI) for uplink scheduling lacks flexibility, allowing only one transport block (TB) to be scheduled, leading to delays and decoding failures in retransmissions, especially for tactile data, which affects user experience.
Innovation Solution
The DCI is redesigned to carry configuration parameters for two TBs, including an initially transmitted TB and a retransmitted TB, enabling flexible scheduling to avoid delays and timeouts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If only one TB can be scheduled by DCI, then the DCI structure remains simple, but the scheduling flexibility is reduced and transmission delay increases
Solution Approach 1:
The patent segments the scheduling capability by introducing separate indication fields for initially transmitted TB and retransmitted TB within the DCI. This allows independent scheduling control of different TB types while maintaining a unified DCI structure, thereby improving scheduling flexibility without excessive complexity increase.
Solution Approach 2:
The DCI structure is designed to be dynamic and adaptable, allowing the network device to flexibly indicate whether to schedule initially transmitted TB, retransmitted TB, or both based on actual transmission needs. The inclusion of new data indicator and redundancy version fields enables dynamic configuration of TB types and their scheduling priorities.
2Reliability
If retransmitted data is scheduled first, then retransmission priority is improved, but initially transmitted data may timeout waiting in queue
Solution Approach 1:
The patent implements dynamic scheduling priority control through the new data indicator field. When the indicator shows that both initially transmitted and retransmitted TBs are scheduled, the system can dynamically adjust which TB is transmitted first based on actual needs, preventing either type from being indefinitely delayed in the queue.
Solution Approach 2:
The patent changes the scheduling parameter by introducing separate indication fields that allow independent control of TB scheduling. The network device can modify the scheduling order and priority based on the specific transmission scenario, ensuring that neither initially transmitted nor retransmitted data is unnecessarily delayed.
3Reliability
If initially transmitted data waits in queue for retransmitted data transmission, then retransmission can be prioritized, but transmission delay increases
Solution Approach 1:
The patent segments the transmission process into independent initially transmitted TB and retransmitted TB scheduling, allowing both types to be handled simultaneously rather than sequentially. This segmentation enables parallel processing and reduces overall transmission delay while maintaining retransmission priority when needed.
Solution Approach 2:
The patent ensures continuous useful action by enabling the terminal device to prepare and transmit both initially transmitted data and retransmitted data without idle waiting. The separate scheduling indications allow the system to maintain continuous transmission activity, improving productivity while ensuring retransmission reliability.
Data Source
AI summary
A data transmission method and a related apparatus are provided. The method includes: receiving downlink control information (DCI) from a network device, where the DCI carries configuration parameters corresponding to two transport blocks (TBs), types of the two TBs include an initially transmitted TB and a retransmitted TB, the initially transmitted TB is used to carry initially transmitted data, and the retransmitted TB is used to carry retransmitted data; determining a type and a quantity of scheduled TBs based on the DCI; and sending, to the network device, the quantity of TBs corresponding to the type. By changing a design of the DCI, the network device can flexibly schedule the retransmitted TB and/or the initially transmitted TB by using the DCI.