Data Transmission Feedback Mechanism for MTC Collision Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In machine type communication (MTC) systems using LTE technology, large numbers of devices performing contention-based non-orthogonal data transmission lead to frequent collisions and deteriorated system performance due to retransmitted data colliding with each other or new data, especially when the number of user equipment (UE) is high.
Innovation Solution
A data transmission method and system where devices determine whether to perform retransmissions based on feedback information, using a probabilistic approach and joint detection by an aggregator (AG) to decode data without requiring all collided devices to retransmit, thereby reducing unnecessary retransmissions and data collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If contention-based non-orthogonal transmission is used to reduce latency, then data transmission speed is improved, but data collisions increase and system performance deteriorates
Solution Approach 1:
The patent implements a feedback mechanism where the receiver sends feedback information to the transmitter indicating whether data transmission was successful. Based on this feedback, the transmitter determines whether to perform retransmission. This feedback loop enables the system to adapt to collision conditions dynamically, maintaining high transmission speed while improving reliability by only retransmitting when necessary.
2Reliability
If retransmission is performed for all transmission errors, then data reliability is improved, but data collisions increase and latency increases
Solution Approach 1:
The patent applies partial action by performing retransmission only when necessary, rather than for all transmission errors. The feedback information indicates whether a transmission error occurred, and retransmission is triggered only based on this condition. This selective approach maintains data reliability while avoiding unnecessary retransmissions that would increase latency and cause additional collisions.
3Quantity of substance
If the number of user equipment increases, then system capacity is improved, but data collisions increase and system performance deteriorates
Solution Approach 1:
The feedback mechanism allows the system to handle increased numbers of user equipment effectively. By receiving feedback information about transmission success or failure, each device can make informed decisions about retransmission. This feedback-driven approach enables the system to maintain performance reliability even as the quantity of user equipment increases, as devices only retransmit when necessary rather than continuously.
Data Source
AI summary
A data transmission method of a device comprises the following steps: transmitting a data to another device; receiving a feedback information from the another device; and when the feedback information indicates a transmission error of the device occurs, determining whether to perform retransmission according to the feedback information.