TDM-Based URLLC M-TRP Resource Allocation
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Solution Overview
Problem
Current wireless communication systems face challenges in supporting explosive data traffic, high per-user data rates, a large number of connected devices, very low end-to-end latency, and high-energy efficiency, particularly in configuring schemes for multiple transmission reception points (TRPs) and resource allocation in time division multiplexing (TDM) based URLLC M-TRP operations.
Innovation Solution
A method for configuring a scheme where multiple TRPs perform cooperative transmission, specifically configuring the number of repetition times and resource allocation for transmission occasions corresponding to the same transport block using TDM based URLLC M-TRP operations, and modifying the Downlink Control Information (DCI) to include a time domain resource assignment field, allowing for efficient resource management and transmission in wireless communication systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple TRPs perform cooperative transmission with repeated transmissions, then reliability of data transmission is improved, but device complexity and resource management complexity increase
Solution Approach 1:
The patent segments the transmission process into multiple transmission occasions, where each TRP transmits the same transport block in different time resources. This segmentation allows the system to achieve reliability through diversity while managing complexity by treating each transmission occasion as an independent unit with standardized configuration procedures.
Solution Approach 2:
The patent introduces dynamic configuration mechanisms where the network can flexibly adjust the number of transmission occasions, time domain resource assignments, and TRP configurations based on channel conditions and service requirements. This dynamic approach allows the system to adapt reliability and complexity levels to specific operational needs rather than maintaining fixed high-complexity configurations.
2Reliability
If multiple TRPs perform cooperative transmission with repeated transmissions, then reliability of data transmission is improved, but system resource overhead increases
Solution Approach 1:
The patent merges multiple transmission occasions carrying the same transport block into a unified resource allocation framework. By combining the scheduling and resource management of multiple TRPs under a single DCI structure with time domain resource assignment fields, the system reduces control signaling overhead while maintaining the reliability benefits of multi-TRP transmission.
Solution Approach 2:
The patent creates universal configuration parameters that can be applied across different TRP configurations and transmission scenarios. The time domain resource assignment field and repetition scheme configurations serve multiple purposes: they manage repeated transmissions, coordinate multiple TRPs, and adapt to different service types (eMBB, URLLC), thereby reducing overall system overhead through multi-functional parameter design.
3Productivity
If TDM based URLLC M-TRP operation is configured with multiple transmission occasions, then data transmission efficiency is improved, but difficulty of resource allocation and management increases
Solution Approach 1:
The patent employs preliminary configuration of time domain resource assignments and transmission occasion parameters through RRC signaling before actual data transmission. This advance configuration establishes the framework for multiple TRP coordinated transmission, allowing the system to achieve high transmission efficiency while reducing real-time management complexity by pre-defining resource allocation patterns and TRP associations.
4Ease of operation
If DCI is modified to include time domain resource assignment field for M-TRP operation, then ease of operation and resource management is improved, but device complexity increases
Solution Approach 1:
The modified DCI structure with time domain resource assignment field serves multiple functions simultaneously: it schedules downlink data reception, indicates transmission occasion configurations for multiple TRPs, and provides timing information for repeated transmissions. This multi-functional design improves ease of operation by consolidating control information into a unified structure while managing device complexity through standardized field interpretations across different scenarios.
Data Source
AI summary
A method for transmitting and receiving downlink data in a wireless communication system includes the steps of: transmitting a preamble for random access; receiving a response message for the random access corresponding to the preamble, a radio remote control (RRC) connection being established based on the preamble and the response message; receiving configuration information, a repetition scheme based on time division multiplexing being set based on the configuration information; receiving downlink control information (DCI); and receiving a plurality of transmission occasions based on the DCI, wherein a resource allocation in the time domain for the first transmission occasion may be determined based on the time domain resource assignment field of the DCI, and resource allocation in the time domain for the second transmission occasion may be determined based on the resource allocation in the time domain for the first transmission occasion.