Dynamic Link Adaptation for Variable Target Error Rates
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional link adaptation schemes in wireless communication are limited to fixed target error rates, making them incompatible with communication scenarios requiring variable target error rates, such as MuLTEfire systems, where MCS reduction is frequently used, leading to slowed or eliminated outer loop link adaptation corrections.
Innovation Solution
An improved link adaptation scheme that adjusts the code rate based on the amount of data and available resources, allowing for a dynamic target error rate, which is updated after each transmission, and incorporates a fading compensation factor to mitigate errors caused by varying channel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional link adaptation schemes operate with a fixed target error rate, then the system is simple and stable, but it is incompatible with communication scenarios requiring variable target error rates
Solution Approach 1:
The patent transforms the fixed target error rate into a dynamic variable that adapts to different communication scenarios. The target error rate is no longer a static parameter but changes based on channel conditions, MCS reduction levels, and communication requirements, enabling compatibility with variable target error rate scenarios like MuLTEfire
Solution Approach 2:
The patent changes the parameter of target error rate from fixed to variable by introducing a mapping relationship between MCS reduction levels and target error rates. This parameter transformation allows the system to select appropriate error rates based on the degree of MCS reduction applied
2Productivity
If MCS reduction is frequently used to improve data transmission efficiency, then productivity increases, but outer loop link adaptation corrections are slowed or eliminated
Solution Approach 1:
The patent applies preliminary action by pre-establishing a mapping relationship between MCS reduction levels and target error rates before actual data transmission. This mapping is configured in advance based on system requirements and channel characteristics, allowing the outer loop link adaptation to function correctly even when MCS reduction is frequently applied
Solution Approach 2:
The patent enhances the feedback mechanism by using the pre-configured mapping to adjust target error rates based on the actual MCS reduction level applied. The system continuously monitors transmission performance and adjusts the target error rate according to the mapping relationship, ensuring that outer loop link adaptation corrections remain effective despite frequent MCS reduction
Data Source
AI summary
A method, a device and a computer readable media for communication are disclosed. The method (200) comprises determining, based on a target error rate between a first device and a second device, a code rate for transmitting data from the second device to the first device (210). The method also comprises adjusting the code rate based on an amount of the data and an amount of resource available for transmitting the data (220). The method further comprises updating the target error rate for transmitting subsequent data from the second device to the first device based on an amount of the adjustment of the code rate (230). An improved link adaption scheme and improve uplink/downlink transmission performance of the communication system are provided.