Abstract
Recently, network coding (NC) has been popularly applied to wireless networks in order to improve scarce wireless capacity. In wireless LANs, NC can be applied to packet retransmission, and a base station can simultaneously retransmit multiple packets destined to different wireless stations by a single retransmission trial. On the other hand, NC creates additional packet delay at both base station and wireless stations, and hence, packet transfer delay may increase seriously. However, existing NC-based retransmission methods do not consider this additional delay explicitly. In addition, when the number of flows is small, NC exhibits less benefit because the chances of NC-based retransmission are highly reduced. Therefore, in this paper, we propose a novel NC-based retransmission method in order to improve packet transfer delay and jitter of received packets. Moreover, to achieve further improvement of delay, jitter and retransmission efficiency even when there exist a small number of traffic flows, we propose a retransmission method in which NC-based retransmission cooperates with the typical ARQ method. We overcome the disadvantage of NC-based retransmission by combining with ARQ cooperatively. Finally, we show the effectiveness of the proposed methods by extensive computer simulation.
Original language | English |
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Pages (from-to) | 3345-3353 |
Number of pages | 9 |
Journal | IEICE Transactions on Communications |
Volume | E93-B |
Issue number | 12 |
DOIs | |
Publication status | Published - 2010 Dec |
Keywords
- Automatic repeat request (ARQ)
- IEEE 802.11 DCF
- Network coding (NC)
ASJC Scopus subject areas
- Software
- Computer Networks and Communications
- Electrical and Electronic Engineering