Parity Packet Buffering for Wireless Retransmission Optimization
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently retransmitting data packets due to large buffering requirements, which affect throughput and latency, especially in high-bandwidth and low-latency scenarios.
Innovation Solution
The proposed solution involves encoding data packets to generate parity packets, which are stored in a retransmission buffer instead of the entire data packets, allowing for efficient retransmission of parity packets to recover incorrectly decoded data packets without retransmitting the entire data packets, thereby reducing buffer size and optimizing retransmission processes across multiple links at the PDCP layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If entire data packets are stored in retransmission buffer, then packet recovery reliability is improved, but buffer size requirements increase
Solution Approach 1:
The patent extracts only the essential parity information from complete data packets and stores only these parity packets in the retransmission buffer. This allows the receiver to recover original data packets through decoding operations without requiring the transmitter to buffer and retransmit entire original packets, thus reducing buffer size while maintaining recovery capability
Solution Approach 2:
Instead of storing and retransmitting original data packets, the system creates encoded copies (parity packets) that contain sufficient information for data recovery. These parity packet copies are stored in the buffer and transmitted when needed, reducing the buffer volume requirement while preserving data integrity
2Volume of stationary object
If parity packets are retransmitted instead of original data packets, then buffer size is reduced, but decoding complexity increases
Solution Approach 1:
The system performs encoding operations in advance to generate parity packets from data packets before transmission. This preliminary encoding action allows the receiver to use straightforward decoding operations on received parity packets, rather than requiring complex real-time processing, thus managing complexity while enabling buffer reduction
3Productivity
If retransmission buffer stores parity packets, then retransmission efficiency is improved, but encoding overhead increases
Solution Approach 1:
The system changes the parameter representation of data from storing complete packets to storing compressed parity information. This parameter transformation reduces the quantity of data that needs to be buffered and retransmitted, improving retransmission efficiency despite the initial encoding processing required to generate the parity packets
Data Source
AI summary
A method, an apparatus, and a processor-readable storage medium for wireless communication are provided. A transmitter transmits data packets to a receiver, encodes the data packets to generate parity packets, stores the parity packets in a retransmission buffer, receives information from the receiver indicating that a data packet was not correctly decoded, and transmits to the receiver the parity packets stored in the retransmission buffer for recovering the data packet not correctly decoded without retransmitting the data packet not correctly decoded. The transmitter may further retransmit to the receiver the parity packets. The transmitted data packets may be encoded at a medium access control (MAC) layer of the transmitter. The retransmission buffer may be located at a radio link control (RLC) layer or a packet data convergence protocol (PDCP) layer of the transmitter. A reordering buffer at the receiver may be located at the RLC layer or PDCP layer.