Adaptive Data Block Transmission Feedback for Wireless Coverage
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Solution Overview
Problem
Current data block transmission techniques in wireless communication systems, such as NB-loT, require excessive repetition to achieve adequate coverage, leading to high radio resource consumption and device power usage, especially in challenging environments like indoors or underground.
Innovation Solution
Implementing a method where the receiving radio node provides feedback to the transmitting radio node on the number of repetitions needed for successful data block decoding, allowing the transmitting node to adapt the redundancy level, thereby reducing unnecessary repetitions and conserving resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data repetitions are transmitted multiple times to achieve coverage enhancement, then radio coverage is improved, but radio resource consumption increases
Solution Approach 1:
The receiving node sends feedback to the transmitting node indicating the actual number of repetitions needed for successful decoding. This feedback mechanism allows the transmitting node to adapt future transmissions to the actual channel conditions, avoiding unnecessary repetitions and optimizing radio resource usage while maintaining reliable coverage.
Solution Approach 2:
The system transitions from static predetermined repetition schemes to dynamic adaptation based on real-time feedback. The transmitting node adjusts the number of repetitions dynamically according to the receiving node's actual needs, optimizing the balance between coverage reliability and resource consumption.
2Reliability
If data repetitions are transmitted multiple times to achieve coverage enhancement, then radio coverage is improved, but device power consumption increases
Solution Approach 1:
The receiving node provides feedback about the actual number of repetitions required for successful decoding. This enables the transmitting node to reduce unnecessary repetitions in subsequent transmissions, directly reducing the time the receiving device must keep its receiver activated and thus lowering power consumption while maintaining coverage reliability.
Solution Approach 2:
The repetition scheme becomes dynamic rather than static, adapting to actual channel conditions through feedback. This reduces the average reception time and power consumption by transmitting only the necessary number of repetitions based on real-time channel quality assessment.
3Reliability
If data repetitions are transmitted multiple times to achieve coverage enhancement, then radio coverage is improved, but transmission time increases
Solution Approach 1:
The receiving node sends feedback indicating the actual number of repetitions needed for successful decoding. This allows the transmitting node to optimize future transmissions by sending only the necessary number of repetitions, reducing transmission time while maintaining the required coverage enhancement and reliability.
Solution Approach 2:
The system implements dynamic adaptation of repetition schemes based on real-time feedback, transitioning from fixed predetermined repetition counts to flexible, condition-based transmission lengths. This reduces average transmission time while maintaining reliable coverage.
4Reliability
If data repetitions are transmitted multiple times to achieve coverage enhancement, then radio coverage is improved, but interference generation increases
Solution Approach 1:
The receiving node provides feedback about the actual number of repetitions required for successful decoding. This enables the transmitting node to reduce unnecessary repetitions, thereby reducing the total transmitted energy and the resulting interference to other users and systems, while maintaining the required coverage enhancement.
Solution Approach 2:
The repetition transmission scheme becomes dynamic and adaptive, adjusting the number of repetitions based on actual channel conditions rather than using fixed predetermined values. This reduces unnecessary transmissions and the associated interference generation while maintaining reliable coverage in challenging environments.
Data Source
Figure 1
Figure 2A~2B
Figure 3A~3B
AI summary
A transmitting radio node (12) (e.g., a radio network node such as a base station) transmits a data block (16) to a receiving radio node (14). Responsive to transmitting the data block (16), the transmitting radio node (12) receives from the receiving radio node (14) feedback (22) indicating how many repetitions of a data block transmission the receiving radio node (14) needs to combine for successful data block decoding. Based on this feedback (22), the transmitting radio node (12) adapts a level of redundancy that the transmitting radio node (12) uses for data block transmission to the receiving radio node (14).