By a News Reporter-Staff News Editor at Telecommunications Weekly -- Investigators discuss new findings in Vehicle Technology. According to news reporting from Chengdu, People's Republic of China, by VerticalNews journalists, research stated, "In this paper, we address the problem of reliable unicast transmission across wireless networks with a packet erasure channel. It has been proven that network coding (NC) can offer significant advantages over conventional approaches for this problem."
The news correspondents obtained a quote from the research from the University of Electronic Science and Technology, "However, existing NC schemes do not always fully exploit the potential of NC due to the lack of understanding of the use of the encoded packets that receivers cannot decode. To overcome this limitation, we propose an NC framework called encoded packet-assisted retransmission (EAR). EAR develops an improved opportunistic listening mechanism that allows receivers to store all heard undecodable NC packets and to report periodically the reception status to the sender. Thus, the sender can directly XOR these encoded packets with other packets to take full advantage of all the available coding opportunities. We also formulate a packet-scheduling problem that aims at maximizing the utilization of coding opportunity in the network. By solving it, we design a simple and efficient scheduler that prioritizes packets according to their contribution to the overall transmission performance. Then, the sender determines a packet that should be transmit next and selects packets to be encoded, i.e., based on the priority class. In addition, we investigate the performance of our approach from a theoretical perspective."
According to the news reporters, the research concluded: "From simulation results, it is seen that EAR can significantly reduce the total number of retransmissions and provide more efficient bandwidth utilization compared with existing schemes."
For more information on this research see: Encoded Packet-Assisted Retransmission for Multiple Unicast Flows in Wireless Networks. IEEE Transactions on Vehicular Technology, 2013;62(7):3409-3422. IEEE Transactions on Vehicular Technology can be contacted at: Ieee-Inst Electrical Electronics Engineers Inc, 445 Hoes Lane, Piscataway, NJ 08855-4141, USA. (Institute of Electrical and Electronics Engineers - www.ieee.org/; IEEE Transactions on Vehicular Technology - ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=25)
Our news journalists report that additional information may be obtained by contacting Z.H. Zhou, Univ Elect Sci & Technol China, Natl Key Lab Sci & Technol Commun, Chengdu 611731, People's Republic of China.
Keywords for this news article include: Asia, Chengdu, Wireless Network, Vehicle Technology, Wireless Technology, People's Republic of China
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