Terminal Device Out-of-Order Downlink Data Processing for URLLC Latency
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Solution Overview
Problem
In the New Radio (NR) system, the delay-sensitive Ultra-Reliable Low Latency (URLLC) service is not scheduled in time due to terminal devices' single-process, sequential processing, which leads to increased transmission delay, as they cannot process URLLC transmissions concurrently with eMBB services.
Innovation Solution
A data transmission method where a terminal device receives and processes out-of-order downlink information, allowing for simultaneous processing and transmission of URLLC data within the idle time intervals of eMBB service processing, by determining whether to process data based on time intervals and priorities, thereby reducing latency without increasing terminal device complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If terminal devices adopt single-process sequential processing, then processing complexity is reduced, but URLLC transmission delay increases
Solution Approach 1:
The patent segments the data processing tasks by service type (eMBB and URLLC) and processes them in separate threads. The eMBB processing thread handles downlink information reception and URLLC processing thread handles uplink information transmission, allowing concurrent execution without increasing overall system complexity
Solution Approach 2:
The patent implements preliminary action by pre-configuring processing priorities where URLLC services are marked as higher priority than eMBB services. This allows the terminal device to preemptively handle URLLC transmissions when idle time arises during eMBB processing, ensuring low-latency requirements are met without complex real-time scheduling
2Productivity
If eMBB service processing time interval is extended, then processing capacity is improved, but URLLC scheduling opportunity is reduced
Solution Approach 1:
The patent introduces dynamic priority adjustment where the terminal device monitors its processing state and dynamically switches between handling eMBB and URLLC services. When idle time is detected during eMBB processing, the system dynamically prioritizes URLLC transmission, adapting the processing behavior to current conditions rather than following a fixed schedule
Solution Approach 2:
The patent ensures continuity of useful action by maintaining parallel processing threads that continuously work on their respective services. The eMBB thread continuously receives and processes downlink information while the URLLC thread continuously prepares uplink transmissions, eliminating idle gaps and ensuring both services progress simultaneously without interruption
Data Source
AI summary
The embodiments of the present disclosure relate to a data transmission method, a terminal device, and a network device. The method includes: receiving, by a terminal device, first downlink information and second downlink information transmitted by a network device, the first downlink information having a time domain position earlier than a time domain position of the second downlink information, and first uplink information corresponding to the first downlink information having a time domain position later than a time domain position of second uplink information corresponding to the second downlink information; and determining, by the terminal device, to process first data corresponding to the first downlink information and/or second data corresponding to the second downlink information, and transmitting the first uplink information and/or the second uplink information to the network device based on a result of the processing.