Abstract
Technologies for retransmission control and error correction are available for communications over the Internet to improve reliability of data. For communications that require the data reliability be ensured, TCP, which performs retransmission control, is often employed. However, for environments and services where response confirmation and retransmission are difficult, error correction technologies are employed. Error correction is generally implemented on UDP, but the existing framework implemented on UDP frequently does not consider the maximum frame size of the data link layer and relegates data division to the IP module. The IP module divides data according to the maximum size for the data link, and the receiving IP module reconstructs the divided data. For a data link layer typified by the current Ethernet with an error detection function, the frame is often destroyed upon error detection. At the IP module, the specification allows destruction of the entire dataset whenever divided data necessary for reconstruction is incomplete. Consequently, an error in a single bit results in a total loss of data handed to the IP module, and thus error correction performance declines with the increase in data size handed to the IP module. The present study considers the MTU of the data link layer and proposes error correction protocol (ECP) over IP, which decreases the transfer data volume flowing to the data link layer by dividing data into blocks of appropriate size based on designated error correction code and its parameters (thus improving error correction performance) and assesses the performance of ECP. Experimental results demonstrate that performance is comparable or better than existing error correction frameworks. Results also show that when a specification not ensuring the reliability of the data link layer was employed, error correction was superior to existing frameworks on UDP.
Highlights
The spread of the Internet in recent years has come with increased communications in which real-time properties are emphasized, such as video teleconferences and voice communication
User Datagram Protocol (UDP) can handle data in lengths of at most 65,535 bytes, but when the data are handed to the IP module, the latter subdivides the received data according to the maximum transmission unit (MTU) size of the data link layer
In fields other than header Sequence Number, Forward Error Correction (FEC) Number, and Header Repair Symbols of Error Correction Protocol (ECP) header, repair data calculated on the basis of the values of the same fields stored in the blocks of subdivided ADU, when used as a repair data header
Summary
The spread of the Internet in recent years has come with increased communications in which real-time properties are emphasized, such as video teleconferences and voice communication. The transport layer for Web viewing and email services frequently employs the Transmission Control Protocol (TCP), which is embedded with functionality that the sending and receiving sides mutually handshake, conduct retransmission control for data errors or losses that occur in the communication pathway, and secure data reliability. Where the data size handled differs greatly between the MTU of the data link layer and UDP, an error of a single bit means loss of 1 UDP datagram. For technology such as FEC Framework [1] that performs error correction on UDP, in some cases the error correction performance declines.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
