Real-time packet transforms to avoid re-transmissions

摘要

There exists a need to reduce re-transmission delays in real time feeds (such as video) by sending the packet with sufficient repair/recovery information inside the packet container so the relaying stations and/or the receiving devices can fix errors in transmission by perusing the contents of the packet and the repair information, and modify the packet and then relay it. By providing the relaying station the ability to fix the error, retransmission of the packet is avoided along each relay station along the network path from source to destination and also by receiving devices that would otherwise request a re-transmission. This application teaches a method so real time streams (e.g. video) may be more efficiently transported over a CSMA based network.

主权项

1. A method for transmitting a standard format network packet containing real time information, comprising the steps of:
modifying said packet by adding redundant information to the packet;
modifying at least one packet header to add a position offset reference number that points to redundant information;revising all checksums within the packet as modified to agree with the packet contents as modified;transmitting the packet through a network, wherein transmitting further comprises the steps of
checking the modified packet during transmission;
if the modified packet is determined to have a checksum mismatch as received, modifying the packet by retrieving the redundant information pointed to by said position offset reference number and replacing a portion of the packet with said redundant information; andcalculating new checksums for packet; andrevising all checksums within the packet as modified to agree with the contents of the modified packet; and upon receipt, modifying the packet to return the packet's format to that of the standard packet format.