Dynamic Transmission Mode Switching for Low Latency Reliability
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Solution Overview
Problem
Current mobile communication systems, such as LTE and HSPA, face challenges in achieving high reliability and low latency due to limitations in retransmission schemes, which result in inefficient resource utilization and delayed message delivery in extreme latency-critical applications.
Innovation Solution
A transmission scheme that initiates a regular retransmission mode and switches to a more aggressive mode after a configurable time if an acknowledgement is not received, utilizing continuous transmission, increased power, or more redundancy to maximize energy conveyance and reliability within a latency budget.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If regular retransmission schemes are used, then resource utilization is efficient, but reliability is insufficient for extreme latency-critical applications
Solution Approach 1:
The system dynamically switches between two transmission modes based on whether an ACK is received within a configurable time. In the first mode, regular retransmission is used for resource efficiency. In the second mode, more aggressive retransmission with higher redundancy is used to ensure reliability. This dynamic adaptation resolves the contradiction by adjusting resource allocation based on actual delivery status.
Solution Approach 2:
The invention changes transmission parameters such as redundancy level and power allocation between two modes. In the first mode, standard parameters are used. In the second mode, parameters are adjusted to increase reliability (higher redundancy, potentially higher power) when the initial transmission fails, thus resolving the contradiction between resource efficiency and reliability.
2Reliability
If aggressive retransmission mode is used continuously, then reliability is improved, but resource waste increases
Solution Approach 1:
The system applies aggressive retransmission (excessive action) only partially - specifically, only when an ACK is not received within the configurable time. For successful transmissions, regular retransmission is used. This partial application of aggressive measures resolves the contradiction by avoiding resource waste while maintaining reliability for failed transmissions.
Solution Approach 2:
The transmission mode dynamically adapts based on ACK reception status. The system transitions from regular mode to aggressive mode only when necessary (ACK not received), and can transition back when successful delivery is confirmed. This dynamic behavior prevents continuous resource waste while ensuring reliability when needed.
3Reliability
If more redundancy is transmitted, then reliability is improved, but resource utilization decreases
Solution Approach 1:
The invention changes the redundancy parameter based on transmission success. In the first mode, standard redundancy is used for resource efficiency. In the second mode, higher redundancy is applied when the initial transmission fails, improving reliability without continuously wasting resources on successful transmissions.
Data Source
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AI summary
Transmitting node and receiving node and methods therein for a high-reliability transmission scheme with low resource utilization.The transmission scheme comprises two modes, where a first mode comprises regular acknowledged retransmission, and a second mode comprises accelerated, or otherwise ramped- up retransmission, thus improving the probability of conveying a message successfully within an allowed delay budget.