Researchers from the Massachusetts Institute of Technology, the California Institute of Technology, and the University of Aalborg say they have successfully transmitted data without link layer flow control overloading throughput with retransmission requests, and have optimized transmission size for network efficiency and application latency limitations. They achieved this stateless transmission using Random Linear Network Coding (RLNC), and the universities are collaborating to commercialize the technology via the Code On Technologies effort.
Data issued by Code On indicates RLNC was 13 percent to 465 percent faster than industry standard Reed-Solomon encoding in storage area network erasure applications testing. Code On also released data demonstrating RLNC enhanced the throughput of mobile video over Wi-Fi.
An RLNC transmission can recover from errors with neither sender nor receiver storing and updating transmission-state information and requesting retransmission of lost packets, as RLNC can reproduce any packet lost on the receiving side from a later sequenced packet. The sender can continuously transmit at near-wire speed optimized for latency and network throughput because the RLNC encoding sender does not have to listen for acknowledgements of successful transmission and perhaps resend.
Moreover, RLNC encoding can ride atop the TCP-IP protocol, so implementation does not necessitate replacement of communications equipment.
From Network World
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