ACK/NACK Feedback Control for URLLC Signaling Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems face challenges in reducing data transmission delay and signaling overhead, particularly for Ultra-Reliable Low-Latency Communication (URLLC) services, due to the need for Acknowledge/Non-acknowledge (ACK/NACK) feedback, which occupies control channel resources and increases latency.
Innovation Solution
A method and device for data transmission where a first device only transmits ACK/NACK feedback information when explicitly indicated by a second device, allowing for reduced signaling overhead and improved resource utilization by embedding feedback indication information within data packets or scheduling information, thereby optimizing resource allocation and minimizing unnecessary feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ACK/NACK feedback is transmitted for every data transmission, then transmission reliability is improved, but transmission delay increases and signaling overhead increases
Solution Approach 1:
The patent applies partial action by transmitting ACK/NACK feedback only when necessary (when poll indication information is received or when data is incorrectly received) rather than for every data transmission. This selective feedback approach maintains transmission reliability for critical cases while reducing overall signaling overhead and transmission delay.
Solution Approach 2:
The patent extracts the feedback transmission decision from being a mandatory universal action and makes it conditional based on specific triggers (poll indication information or decoding failure). This separates the essential feedback cases from unnecessary feedback transmissions, resolving the contradiction between reliability and delay/overhead.
2Reliability
If ACK/NACK feedback is transmitted for every data transmission, then transmission reliability is improved, but signaling overhead increases
Solution Approach 1:
The patent implements partial action by transmitting ACK/NACK feedback only in specific scenarios (when poll indication information is received or when data reception fails) rather than universally for all data transmissions. This reduces signaling overhead while maintaining reliability for critical feedback cases.
Solution Approach 2:
The patent extracts feedback transmission from being a universal requirement and makes it conditional based on specific triggers. This separation removes unnecessary feedback signaling while preserving essential feedback for reliability-critical scenarios.
3Reliability
If decoding time is extended to ensure accurate ACK/NACK feedback, then transmission reliability is improved, but transmission delay increases
Solution Approach 1:
The patent applies partial action by performing thorough decoding and feedback only when necessary (triggered by poll indication information or suspected decoding errors) rather than for every data transmission. This maintains decoding accuracy for critical cases while reducing overall feedback time.
Solution Approach 2:
The patent uses preliminary action through pre-configured poll indication information that triggers feedback transmission in advance of actual need, allowing the system to prepare for feedback transmission without waiting for decoding completion in all cases, thus reducing overall feedback time while maintaining accuracy when needed.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
Provided in embodiments of the present invention are a method and device for transmitting data. The method comprises: a first device receives first indication information transmitted by a second device, the first indication information being used for indicating whether the first device is to transmit acknowledgement/negative-acknowledgement (ACK/NACK) feedback information for first data to the second device; and when the first indication information is used for indicating the first device to transmit the ACK/NACK feedback information for the first data to the second device, the first device transmits the ACK/NACK feedback information for the first data to the second device, thus saving signaling overhead and increasing resource utilization rate.