Multi-TRP Control Information for URLLC Data Scheduling
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Solution Overview
Problem
Current communication technologies face challenges in efficiently scheduling the transmission of identical data across multiple Transmission/Reception Points (TRPs) in ultra-reliable low latency communications (URLLC) scenarios, particularly for the physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH).
Innovation Solution
The proposed solution involves a method where a terminal device receives control information from multiple network devices, determining parameters for communicating identical data with each network device. This method includes generating and transmitting control information that indicates the parameters for both network devices, allowing the terminal device to perform the communication based on these parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If identical data is transmitted across multiple TRPs for URLLC, then communication reliability is improved, but control information scheduling complexity increases
Solution Approach 1:
The patent combines control information for multiple TRPs into a single DCI (Downlink Control Information) structure. The first TRP uses a first DCI while the second TRP uses a second DCI, both containing parameters for identical data transmission. This merging approach allows the terminal to receive control information from multiple TRPs without requiring separate, complex scheduling mechanisms for each TRP, thereby improving reliability while managing complexity.
Solution Approach 2:
The control information structure is designed to be universal across multiple TRPs. The same DCI format and parameter structure are used for both the first TRP and second TRP, allowing the terminal to interpret and execute control information consistently across different TRPs. This multi-functionality reduces the complexity of handling control information for multiple TRPs while maintaining reliable data transmission.
2Productivity
If control information payload is minimized, then transmission efficiency is improved, but parameter indication capability is reduced
Solution Approach 1:
The patent applies local quality by indicating parameters differently for different TRPs within the same control information structure. The first DCI contains first parameters specific to the first TRP, while the second DCI contains second parameters specific to the second TRP. This allows efficient parameter indication tailored to each TRP's specific requirements without requiring redundant information, thereby maintaining transmission efficiency while providing adequate parameter indication capability.
Solution Approach 2:
The control information uses parameter changes to indicate different transmission parameters for different TRPs. By varying parameters such as time resources, frequency resources, and modulation coding schemes within the DCI structure, the system can efficiently adapt to different TRP configurations without increasing the overall payload size. This parameter change approach maintains transmission efficiency while providing the necessary adaptability for multi-TRP operation.
Data Source
AI summary
Embodiments of the present disclosure provide methods, devices and computer readable media for multi-TRP communication. In a method for communication, a terminal device receives control information from at least one of a first network device and a second network device. The terminal device determines, from the control information, a first parameter for communication of a first data between the first network device and the terminal device and a second parameter for communication of a second data between the second network device and the terminal device, and the first data and the second data are identical. The terminal device performs, based on the first and second parameters, the communication of the first data with the first network device and the communication of the second data with the second network device. The embodiments of the present disclosure propose a new design of control information for multi-TRP communication.