Wireless Packet Recovery Through Retroactive Interference Cancellation
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Solution Overview
Problem
Existing wireless communication systems face challenges in ensuring reliable data transmission and spectral efficiency, particularly in scenarios requiring ultra-reliable low-latency communications, such as multimedia applications, where packet loss can degrade the quality of stored data without additional retransmissions.
Innovation Solution
A packet repair and recovery technique that utilizes successive interference cancellation in a retroactive manner to recover dropped packets by leveraging correlation between non-orthogonal transmitted packets, without requiring additional retransmissions, thereby improving data reliability and spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional wireless communication systems use standard packet transmission without retransmission, then spectral efficiency and power consumption are maintained at acceptable levels, but packet loss occurs and degrades data reliability
Solution Approach 1:
The system performs preliminary actions by storing received packets in a buffer before final delivery, enabling later recovery of dropped packets through interference cancellation techniques without requiring immediate retransmission, thus improving reliability while maintaining spectral efficiency
Solution Approach 2:
The patent converts the harmful effect of packet loss into a beneficial process by using interference cancellation to recover dropped packets from the buffered data sequences, transforming what would be a failure into a successful recovery mechanism that improves reliability without sacrificing spectral efficiency
2Reliability
If additional retransmissions are performed to recover dropped packets, then data reliability is improved, but system latency increases and throughput decreases
Solution Approach 1:
The system performs preliminary buffering of received packets, enabling recovery of dropped packets through interference cancellation without requiring immediate retransmission, thus improving reliability while avoiding the latency penalty of traditional retransmission mechanisms
Solution Approach 2:
The patent implements feedback mechanisms where the receiver sends acknowledgment information about packet reception status, enabling the transmitter to adjust transmission strategies and the receiver to recover dropped packets using buffered data and interference cancellation, improving reliability without excessive latency
3Reliability
If error correction codes are added to protect against packet loss, then data reliability is improved, but overhead increases and spectral efficiency decreases
Solution Approach 1:
The patent converts the harmful interference from dropped packets into a beneficial signal for recovery by using interference cancellation techniques, allowing the system to achieve packet error protection without adding traditional error correction overhead, thus maintaining spectral efficiency while improving reliability
Data Source
AI summary
A method can be implemented by a first device. A first data sequence can be received and can include a first data packet and a second data packet. It can be determined that first detection of the first data packet from the first data sequence is erroneous. The first data sequence can be stored as a first buffered data sequence in a memory buffer. A second data sequence that includes the second data packet and that excludes the first data packet can be received. The second data packet can be detected from the second data sequence. The first data packet can be detected based on the first buffered data sequence and the second data packet.