Dynamic Transmission Attempt Allocation for Wireless Reliability
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Solution Overview
Problem
Current wireless communication systems fail to meet the stringent requirements of ultra-reliable and low-latency communications, particularly in applications like autonomous driving and industrial automation, due to limitations in transmission attempts and resource allocation schemes.
Innovation Solution
The proposed solution involves dividing the total number of transmission attempts for data communication between uplink and downlink in peer-to-peer communications, dynamically adjusting based on link quality and success/failure of transmission attempts, using adaptive resource allocation schemes to optimize resource utilization and meet reliability and latency constraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the total number of transmission attempts is fixed and equally allocated between uplink and downlink, then the system maintains simple resource allocation, but spectral efficiency and reliability are insufficient for ultra-reliable communications
Solution Approach 1:
The patent implements dynamic resource allocation where the network node adjusts the number of transmission attempts for uplink and downlink based on real-time link quality measurements and transmission outcomes. The allocation changes from static equal division to dynamic asymmetric allocation, allowing the system to adapt to varying channel conditions and achieve ultra-reliable communications while maintaining manageable complexity through automated adjustments.
2Reliability
If more transmission attempts are allocated to one direction, then reliability for that direction improves, but overall resource utilization efficiency decreases
Solution Approach 1:
The patent changes the parameter of transmission attempt allocation from fixed equal division to dynamic asymmetric allocation based on link quality parameters. The network node monitors channel conditions and adjusts the number of transmission attempts for each direction accordingly, optimizing both reliability and resource utilization by allocating more attempts to the direction with poorer link quality rather than uniformly distributing resources.
Solution Approach 2:
The system implements feedback mechanisms where transmission outcomes and link quality measurements are reported back to the network node, which then adjusts future transmission attempt allocations. This closed-loop control ensures that resource allocation continuously optimizes the balance between reliability and resource utilization efficiency based on actual system performance.
3Productivity
If adaptive resource allocation is implemented to optimize spectral efficiency, then communication performance improves, but system complexity and coordination overhead increase
Solution Approach 1:
The network node serves as an intermediary that centralizes the complexity of adaptive resource allocation. Instead of requiring complex coordination between user equipment nodes, the network node receives link quality measurements, determines optimal transmission attempt allocations, and provides guidance to transmitting nodes. This intermediary approach achieves high spectral efficiency while keeping individual device complexity manageable.
Data Source
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Figure 2A
AI summary
For a communication between two UEs that passes through a network node, a total number of transmission attempts for a same set of data is divided between first and second data transmission attempt(s). The first data transmission attempt(s) are allowed to be performed from a first one of the two UEs toward the network node. The second data transmission attempt(s) are allowed to be performed from the network node or from a second network node toward a second one of the two UEs. Performance of the first and second data transmission attempt(s) is coordinated based on the division to cause communication of the set of data from the first UE to the second UE. A single network node may perform the first and second data transmission attempts, or a first network node performs the first data transmission attempts while a second network node performs the second data transmission attempts.