PHY Header Field Array for Parallel Packet Retransmission
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Solution Overview
Problem
Existing packet data networks face challenges in minimizing packet error rates (PER) and maintaining low latency due to serial error corrective actions, particularly in environments with short burst noises, such as the automotive industry.
Innovation Solution
A physical (PHY) layer with a centralized header descriptor array (HDA) that stores and manages packet header fields, enabling parallel processing and re-transmission requests to support ultra-low PER and low latency by using a write interface module, header field array, and read interface modules for parallel reading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If serial error corrective actions are used in the data link layer, then packet error rate is reduced, but transmission latency increases
Solution Approach 1:
The patent segments the error correction process by implementing a first-in-first-out (FIFO) queue structure that separates packet reception, error detection, and retransmission handling into distinct stages. This allows multiple packets to be processed concurrently at different stages, reducing the overall latency while maintaining reliable error correction through systematic queue management and selective retransmission.
2Reliability
If retransmission mechanisms are implemented, then packet delivery reliability improves, but processing time increases
Solution Approach 1:
The patent implements preliminary action by pre-allocating FIFO queues and pre-processing packet headers to extract and validate critical information before full packet transmission. Error detection codes are calculated and verified in advance, and the system maintains ready-state retransmission buffers, allowing rapid response to errors without extensive processing delays when retransmission is needed.
Data Source
AI summary
A method for managing packet header fields in a physical (PHY) layer includes: receiving, by a header descriptor array (HDA) of a PHY layer, a data packet and a status signal of the data packet; writing, by the HDA, a header field for the received data packet; storing, by the HDA, the written header field and the status signal of the data packet in a header field array; and fetching, by the HDA, the header field of the data packet by enabling parallel reading of a plurality of locations of the header field array, enabling transmission and re-transmission of the data packet.