Collision Detection in Data Transmission via Receive-End Feedback
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Solution Overview
Problem
In CSMA/CA protocols, the transmit end cannot timely detect collisions at the receive end, leading to low data packet transmission efficiency and channel utilization due to the need to wait for a preset duration before retransmission.
Innovation Solution
Incorporating collision detection information in data packets, allowing the receive end to perform collision detection and notify the transmit end for immediate retransmission, thereby reducing waiting time and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the transmit end waits for a preset duration before retransmission to determine collision, then the protocol implementation is simple, but the data packet transmission efficiency is low
Solution Approach 1:
The patent implements feedback by having the receive end send back collision detection information to the transmit end. This allows the transmit end to immediately know whether a collision occurred without waiting for the preset duration, enabling timely retransmission decisions and improving transmission efficiency while reducing waiting time.
Solution Approach 2:
The patent applies preliminary action by performing collision detection at the receive end immediately upon receiving the data packet, rather than waiting for the preset duration to elapse. The receive end prepares and sends collision detection information back to the transmit end in advance, allowing the transmit end to make retransmission decisions sooner.
2Productivity
If the transmit end cannot learn in time about collisions at the receive end, then the protocol implementation is straightforward, but the channel utilization is low
Solution Approach 1:
The patent establishes a feedback mechanism where the receive end sends collision detection information back to the transmit end. This ensures the transmit end receives timely collision information without loss, enabling it to adjust its transmission strategy and improve channel utilization by avoiding redundant transmissions and timing out waiting periods.
Data Source
AI summary
Example methods and apparatus for implementing collision detection in data transmission are described. One example method includes sending a data packet including collision detection information to a receive end, where the collision detection information is used by the receive end to perform collision detection on the data packet. A status indication message sent by the receive end is received by the receive end when sending the data packet. The receive end parses the status indication message. If the status indication message includes collision information, the receive end perform retransmission of the data packet.