D2D Feedback Mechanism for IoV Data Reliability
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Solution Overview
Problem
In the Internet of Vehicles (IoV) system, ensuring the reliability of data transmission between terminal devices without routing through a network device is a challenge due to direct terminal-to-terminal communication, which can lead to uncertainties in data reception and retransmission.
Innovation Solution
Implementing a method for data retransmission and feedback information transmission using device-to-device (D2D) communication, where terminal devices obtain and utilize retransmission resources based on feedback from the receiving device, ensuring proper communication decisions and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If direct terminal-to-terminal communication is adopted in IoV system, then spectrum efficiency is improved and transmission delay is reduced, but reliability of data transmission deteriorates due to uncertainties in data reception and retransmission
Solution Approach 1:
The patent implements a feedback mechanism where the receiving terminal device sends feedback information (ACK/NACK) to the transmitting terminal device to indicate whether data was successfully received. This feedback enables the transmitting device to determine whether retransmission is necessary, thereby improving transmission reliability while maintaining the efficiency benefits of direct D2D communication.
Solution Approach 2:
The patent establishes predetermined rules and protocols for feedback transmission and retransmission operations before actual data communication occurs. This includes pre-defining feedback resources, timing relationships, and retransmission triggers, which allows terminal devices to autonomously manage reliable communication without real-time network intervention.
2Reliability
If feedback information transmission and retransmission mechanisms are implemented in D2D communication, then reliability of data transmission is improved, but device complexity increases due to additional communication protocols and resource management
Solution Approach 1:
The patent enables terminal devices to autonomously perform feedback transmission and retransmission operations without network device intervention. The receiving device automatically sends feedback information when data is received, and the transmitting device automatically determines and executes retransmission based on the feedback, reducing the complexity burden on individual devices.
Solution Approach 2:
The patent combines feedback information transmission with existing D2D communication resources and protocols. Feedback information is transmitted using the same physical channels and resource allocation mechanisms as data transmission, and retransmission operations are integrated into the existing communication framework, thereby minimizing additional complexity.
Data Source
AI summary
Methods and devices for transmission of feedback information and methods and devices for data retransmission are provided. A method for transmission of feedback information includes the following. A second terminal device send first data to a first terminal device through device to device (D2D) communication. The second terminal device obtains a retransmission resource. The second terminal device retransmit the first data to the first terminal device on the retransmission resource through D2D communication, according to feedback information of the first terminal device responsive to the first data.